Random access channel transmission method and apparatus, device, medium, and program product

Abstract

The present application relates to the field of communications, and discloses a random access channel transmission method and apparatus, a device, a medium, and a program product. The method comprises: on the basis of a correlation parameter when a random access channel is transmitted in a first-type time domain resource and / or a correlation parameter when the random access channel is transmitted in a second-type time domain resource, transmitting the random access channel. According to the method provided in the present application, for different types of time domain resources, a terminal device can determine correlation parameters for the random access channel transmission for different time domain resource types, thereby achieving differentiated design for the different time domain resource types.

Description

Random access channel transmission method, device, equipment, medium and program product Technical Field

[0001] The present application relates to the field of communications, and in particular to a transmission method, apparatus, device, medium, and program product for a random access channel. Background Art

[0002] Random access is a necessary process for establishing a wireless link between a terminal device and a network device. The terminal device needs to determine the relevant parameters when sending the random access channel.

[0003] However, as the duplex mode in the New Radio (NR) system is constantly being designed and optimized, how to design a transmission method for the random access channel to enable the random access channel to be sent based on different duplex modes is an urgent problem that needs to be solved.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a random access channel transmission method, apparatus, device, medium, and program product. The technical solution is as follows:

[0006] According to one aspect of the present application, a random access channel transmission method is provided, the method being performed by a terminal device, the method comprising:

[0007] The random access channel is sent according to relevant parameters when the random access channel is transmitted in the first type of time domain resources and / or relevant parameters when the random access channel is transmitted in the second type of time domain resources.

[0008] According to one aspect of the present application, a random access channel transmission method is provided, the method being performed by a network device, the method comprising:

[0009] The random access channel is received, where the random access channel is sent by the terminal device according to relevant parameters of the random access channel when it is transmitted in the first type of time domain resources and / or relevant parameters of the random access channel when it is transmitted in the second type of time domain resources.

[0010] According to one aspect of the present application, a random access channel transmission method is provided, the method being performed by a terminal device, the method comprising:

[0011] Receive at least one of a first configuration, a second configuration, and a third configuration, where the first configuration, the second configuration, and the third configuration are used to configure relevant parameters during transmission of the random access channel, the first configuration corresponds to the first type of time domain resources, the second configuration corresponds to the second type of time domain resources, and the third configuration corresponds to the first type of time domain resources and the second type of time domain resources.

[0012] According to one aspect of the present application, a random access channel transmission method is provided, the method being performed by a terminal device, the method comprising:

[0013] Transmitting a random access channel on a valid random access channel transmission opportunity;

[0014] Among them, a random access channel transmission opportunity is valid in the following cases: the random access channel transmission opportunity is within an uplink symbol; or the random access channel transmission opportunity is within a first type of time domain resource, and the random access channel transmission opportunity is located within a first frequency domain bandwidth.

[0015] According to one aspect of the present application, a random access channel transmission device is provided, the device comprising:

[0016] The first sending module is configured to send the random access channel according to relevant parameters of the random access channel when it is transmitted in the first type of time domain resources and / or relevant parameters of the random access channel when it is transmitted in the second type of time domain resources.

[0017] According to one aspect of the present application, a random access channel transmission device is provided, the device comprising:

[0018] The second receiving module is used to receive the random access channel, where the random access channel is sent by the terminal device according to relevant parameters of the random access channel when transmitted in the first type of time domain resources and / or relevant parameters of the random access channel when transmitted in the second type of time domain resources.

[0019] According to one aspect of the present application, a random access channel transmission device is provided, the device comprising:

[0020] The third receiving module is used to receive at least one of the first configuration, the second configuration and the third configuration, where the first configuration, the second configuration and the third configuration are used to configure relevant parameters during transmission of the random access channel, the first configuration corresponds to the first type of time domain resources, the second configuration corresponds to the second type of time domain resources, and the third configuration corresponds to the first type of time domain resources and the second type of time domain resources.

[0021] According to one aspect of the present application, a random access channel transmission device is provided, the device comprising:

[0022] A transmission module, configured to transmit a random access channel on a valid random access channel transmission opportunity;

[0023] Among them, a random access channel transmission opportunity is valid in the following cases: the random access channel transmission opportunity is within an uplink symbol; or the random access channel transmission opportunity is within a first type of time domain resource, and the random access channel transmission opportunity is located within a first frequency domain bandwidth.

[0024] According to one aspect of the present application, a terminal device is provided, comprising:

[0025] A processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor;

[0026] The processor is configured to load and execute the executable instructions to implement the above-mentioned random access channel transmission method.

[0027] According to one aspect of the present application, a network device is provided, comprising:

[0028] A processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor;

[0029] The processor is configured to load and execute the executable instructions to implement the above-mentioned random access channel transmission method.

[0030] According to one aspect of the present application, a computer-readable storage medium is provided, in which at least one program is stored. The at least one program is loaded and executed by a processor to implement the above-mentioned random access channel transmission method.

[0031] According to one aspect of the present application, a chip is provided, which includes a programmable logic circuit and / or program instructions. When the chip runs on a terminal device or a network device, it is used to implement the above-mentioned random access channel transmission method.

[0032] According to one aspect of the present application, a computer program product is provided, which includes computer instructions, the computer instructions are stored in a computer-readable storage medium, a processor obtains the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to implement the above-mentioned random access channel transmission method.

[0033] The technical solutions provided by the embodiments of the present application include at least the following beneficial effects:

[0034] The terminal device sends a random access channel based on the relevant parameters of the random access channel when it is transmitted in the first type of time domain resources and / or the relevant parameters when it is transmitted in the second type of time domain resources. That is, the terminal device can determine the relevant parameters for transmission under each time domain resource type for different time domain resource types, and send the random access channel based on the relevant parameters. Since the number, position, size, frequency domain bandwidth, etc. of available uplink resources are different in different time domain resource types, the interference to the terminal device when using different time domain resource types for time domain resource transmission will be different, so the link quality corresponding to different time domain resource types is also different; the terminal device determines different relevant parameters for transmission for different time domain resource types, which can improve the transmission success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] FIG1 shows a schematic diagram of non-overlapping full-duplex sub-bands provided by the related art;

[0037] FIG2 shows a schematic diagram of a frequency domain resource configuration of a physical random access channel (PRACH) provided by a related art;

[0038] FIG3 shows a schematic diagram of PRACH power control provided by the related art;

[0039] FIG4 shows a schematic diagram of a mobile communication system provided by an exemplary embodiment of the present application;

[0040] FIG5 shows a flow chart of a random access channel transmission method provided by an exemplary embodiment of the present application;

[0041] FIG6 is a schematic diagram showing a random access channel transmission method provided by an exemplary embodiment of the present application;

[0042] FIG7 is a schematic diagram showing a random access channel transmission method provided by an exemplary embodiment of the present application;

[0043] FIG8 is a schematic diagram showing a random access channel transmission method provided by an exemplary embodiment of the present application;

[0044] FIG9 is a schematic diagram showing a random access channel transmission method provided by an exemplary embodiment of the present application;

[0045] FIG10 is a schematic diagram showing a random access channel transmission method provided by an exemplary embodiment of the present application;

[0046] FIG11 is a schematic diagram showing a random access channel transmission method provided by an exemplary embodiment of the present application;

[0047] FIG12 is a schematic diagram showing a random access channel transmission method provided by an exemplary embodiment of the present application;

[0048] FIG13 is a schematic diagram showing a random access channel transmission method provided by an exemplary embodiment of the present application;

[0049] FIG14 is a schematic diagram showing a random access channel transmission method provided by an exemplary embodiment of the present application;

[0050] FIG15 is a schematic diagram showing a random access channel transmission method provided by an exemplary embodiment of the present application;

[0051] FIG16 is a schematic diagram showing a random access channel transmission method provided by an exemplary embodiment of the present application;

[0052] FIG17 shows a flowchart of a random access channel transmission method provided by an exemplary embodiment of the present application;

[0053] FIG18 shows a flowchart of a random access channel transmission method provided by an exemplary embodiment of the present application;

[0054] FIG19 shows a flowchart of a random access channel transmission method provided by an exemplary embodiment of the present application;

[0055] FIG20 shows a structural block diagram of a transmission device for a random access channel provided by an exemplary embodiment of the present application;

[0056] FIG21 shows a structural block diagram of a transmission device for a random access channel provided by an exemplary embodiment of the present application;

[0057] FIG22 shows a structural block diagram of a transmission device for a random access channel provided by an exemplary embodiment of the present application;

[0058] FIG23 shows a structural block diagram of a transmission device for a random access channel provided by an exemplary embodiment of the present application;

[0059] FIG24 shows a schematic structural diagram of a terminal device provided by an exemplary embodiment of the present application;

[0060] FIG25 shows a schematic structural diagram of a network device provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0061] To make the objectives, technical solutions, and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings. Exemplary embodiments will be described in detail herein, with examples shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0062] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. As used in this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0063] It should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0064] The technical solutions described in some embodiments of the present application can be applicable to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity) system. Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system, cellular Internet of Things system, cellular passive Internet of Things system, and can also be applied to subsequent evolution systems of 5G NR system, and can also be applied to 6G and subsequent evolution systems.

[0065] It should be understood that in some embodiments of the present application, "5G" may also be referred to as "5G NR" or "NR".

[0066] It should be understood that in the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0067] In the embodiments of the present application, "predefined" can be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (for example, a terminal device and a network device). The present application does not limit the specific implementation method. For example, predefined can refer to information defined in a protocol.

[0068] In the embodiments of the present application, "protocol" may refer to a standard protocol in the field of communications, for example, it may include an LTE protocol, a NR protocol, and related protocols used in future communication systems, and this application does not limit this.

[0069] Next, we will introduce SubBand non-overlapping Full Duplex (SBFD):

[0070] To overcome the problems of weak uplink coverage, long uplink latency, and insufficient uplink capacity caused by limited uplink (UL) resource allocation in Time Division Duplexing (TDD) technology, SBFD technology was proposed. SBFD technology allows data to be simultaneously transmitted and received on different subbands within the same subframe, time slot, or symbol. SBFD is primarily used on the network equipment side, while the user equipment (UE) side maintains its current state, specifically only transmitting or receiving data within the same subframe, time slot, or symbol. SBFD is also known as Cross Division Duplex (XDD) technology.

[0071] Exemplarily, the SBFD technology, as shown in Figure 1, configures a portion of the frequency domain resources corresponding to a downlink (DL) time domain unit as an uplink subband. As shown in Figure 1(a), the middle subband of the frequency domain resources corresponding to a DL time domain unit is configured as an uplink subband. Alternatively, as shown in Figure 1(b), the upper subband of the frequency domain resources corresponding to a DL time domain unit is configured as an uplink subband.

[0072] Generally speaking, SBFD operations meet the following requirements:

[0073] SBFD operates within one TDD carrier.

[0074] The SBFD solution is designed within a single uplink and downlink BWP (Bandwidth Part) pair with aligned center frequencies.

[0075] Within a TDD carrier, an SBFD symbol (including legacy uplink symbols) can contain at most one uplink subband. This uplink subband can be located in the center of the TDD carrier or on either side. Furthermore, the protocol stipulates that uplink transmission is restricted to the UL subband, and downlink reception is restricted to the DL subband.

[0076] Next, the Physical Random Access Channel (PRACH) is introduced:

[0077] PRACH-related parameters are configured through the random access general configuration (RACH-ConfigGeneric). The following describes the parameters in RACH-ConfigGeneric from three aspects: time domain resource configuration, frequency domain resource configuration, and power control.

[0078] PRACH time domain resource configuration:

[0079] In 5G NR, the time domain resources corresponding to the random access channel are determined based on the PRACH configuration table. There are three PRACH configuration tables, one for each frequency band and frequency band standard: PRACH configuration table 1 is the PRACH configuration for the FDD (Frequency Division Duplexing) band on FR1 (Frequency Range 1), PRACH configuration table 2 is the PRACH configuration for the TDD band on FR1, and PRACH configuration table 3 is the PRACH configuration on FR2. The terminal device determines the PRACH configuration table to use when receiving the PRACH configuration based on the frequency band and frequency band standard of the cell it resides in.

[0080] When configuring the time domain resources corresponding to the cell random access channel for the terminal device, the physical random access channel-configuration index (prach-ConfigurationIndex) parameter indicates a sequence number in the corresponding PRACH configuration table. The terminal obtains the PRACH time domain resource configuration information of the cell according to the corresponding PRACH configuration table. The time domain resource configuration information includes:

[0081] 1. PRACH sequence format: All long and short sequence formats are configured in FR1, and only short sequence format is configured in FR2.

[0082] 2. Configuration period and system frame number: The repetition period of the PRACH transmission opportunity and the system frame number in which it is located. NR supports period configurations of 10ms, 20ms, 40ms, 80ms and 160ms.

[0083] 3. Subframe / time slot number: The subframe number or time slot number in which the PRACH transmission opportunity appears within the system frame. FR1 indicates the subframe number, which is also the 15 kHz time slot number; FR2 indicates the 60 kHz time slot number.

[0084] 4. For short sequences, the number of PRACH time slots in a subframe or a 60 kHz time slot is also configured. When the random access sequence is configured with a larger subcarrier spacing, there will be two PRACH time slots in a subframe or a 60 kHz time slot. When the indication value is 2, both PRACH time slots can be used; when it indicates that there is one PRACH time slot, the later PRACH time slot is used by default.

[0085] 5. Start symbol and duration: The starting position and duration of a PRACH transmission opportunity within a PRACH timeslot. The duration is the number of consecutive occurrences. Even within the same sequence format, period, and timeslot number configuration, different start positions and durations can be used to provide a wider range of PRACH density configurations.

[0086] PRACH frequency domain resource configuration:

[0087] In the frequency domain dimension, NR supports the configuration of 1, 2, 4 or 8 FDM (Frequency Division Multiplexing) PRACH resources, and expands the PRACH capacity through the relevant parameter configuration of message 1-frequency division multiplexing (msg1-FDM), that is, determining the number of PRACH transmission opportunities in the frequency domain dimension, that is, determining the number of PRACH resources in the frequency domain dimension. When there are more than one PRACH resources configured in the frequency domain dimension, these PRACH resources are continuously distributed in the frequency domain dimension. The network device notifies the terminal device of the offset of the starting PRB (Physical Resource Blocks) of the first PRACH transmission opportunity in the frequency domain dimension relative to the starting PRB of the BWP through the relevant parameter message 1-frequency start (msg1-FrequencyStart). For example, as shown in Figure 2, the PRACH transmission opportunity in the frequency domain dimension is obtained by selecting msg1-FDM and msg1-FrequencyStart.

[0088] PRACH power control:

[0089] PRACH power control uses an open-loop power control mechanism. The UE sets the PRACH transmit power based on factors such as the expected receive power configured by the network equipment and the path loss measured by the downlink reference signal:

[0090] The terminal determines the PRACH transmit power using the following formula: PRACH，b，f，c (i) = min{P CMAX，f，c (i), P PRACH，target，f，c +PL b，f，c}[dBm]

[0091] Where, f is carrier; c is serving cell; b is BWP; i is PRACH transmission opportunity; P CMAX， f，c (i) The maximum output power configured for the UE; P PRACH，target，f，c is the leading target power; PL b，f，c For road damage.

[0092] The calculation formula of the preamble target power PREAMBLE_RECEIVED_TARGET_POWER is as follows.

[0093] PREAMBLE_RECEIVED_TARGET_POWER=preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER–1)×PREAMBLE_POWER_RAMPING_STEP;

[0094] Among them, the preamble target received power (preambleReceivedTargetPower) is configured through signaling and can also be called the target power level; the preamble code increment (DELTA_PREAMBLE) is determined based on at least one of the random access preamble code format, the subcarrier spacing used, and the fixed value agreed upon by the protocol; the number of retransmissions (PREAMBLE_POWER_RAMPING_COUNTER), which can also be called the number of preamble power ramps, is determined based on the power ramp counter and is initialized to 1 at the beginning of each random access process; the power ramp step (PREAMBLE_POWER_RAMPING_STEP), which can also be called the preamble power ramp step, is used to indicate the step size of the power ramp.

[0095] During the random access process, if the UE sends a PRACH but does not receive a RAR (Random Access Response) response from the network or does not successfully receive a conflict resolution message, the UE needs to resend the PRACH. When the NR UE supports multiple transmit beams, during retransmission, if the transmit beam remains unchanged, the retransmitted PRACH transmit power will be increased based on the last transmitted PRACH transmit power. This can be understood as the number of retransmissions plus 1, or as the power climb counter plus 1, until the random access process is successfully completed. However, when the UE switches the transmit beam, considering the interference control during beam switching and the delay of random access, the protocol stipulates that the power climb counter remains unchanged. As shown in Figure 3, the slashed ellipse 11 represents the transmit beam used in this transmission, and the dotted ellipse 12 represents the transmit beam not used in this transmission. The transmit beam used in the initial transmission, the first retransmission, and the second retransmission is the same. Therefore, the power climb counter is incremented by 1 during the retransmission. During the third retransmission, the transmit beam used is changed compared to the transmit beam used in the previous transmission. Therefore, the power climb counter remains unchanged during the third retransmission. During the fourth retransmission, the transmit beam used does not change, and the power climb counter is incremented by 1.

[0096] Figure 4 shows a schematic diagram of a mobile communication system provided by an exemplary embodiment of the present application. The mobile communication system includes a network device 110 and a terminal device 120, and may or may not include a terminal device 130, which is not limited in the present application.

[0097] The network device 110 in the present application provides wireless communication functions, and the network device 110 includes but is not limited to: Evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home Evolved Node B, or Home Node B, HNB), Base Band Unit (BBU), Access Point (AP) in Wireless Fidelity (Wi-Fi) system, Wireless Relay Node, Wireless Backhaul Node, Transmission Point (TP) or Transmission and Reception Point (TRP), etc., and can also be the Next Generation Node B (NGNB) in the 5th Generation (5G) mobile communication system. The term "gNB" refers to a base station (B, gNB) or a transmission point (TRP or TP), or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU), or a base station in a Beyond Fifth Generation (B5G) or a 6th Generation (6G) mobile communication system, or a core network (CN), fronthaul, backhaul, radio access network (RAN), network slicing, or a serving cell, primary cell (PCell), primary secondary cell (PSCell), special cell (SpCell), secondary cell (SCell), or neighboring cell of a terminal device.

[0098] The terminal device 120 in this application is also called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, and user device. The terminals include, but are not limited to, handheld devices, wearable devices, vehicle-mounted devices, and Internet of Things devices, such as mobile phones, tablet computers, e-book readers, laptop computers, desktop computers, televisions, game consoles, mobile Internet devices (MIDs), augmented reality (AR) terminals, virtual reality (VR) terminals, mixed reality (MR) terminals, extended reality (XR) terminals, baffle reality (BR) terminals, cinematic reality (CR) terminals, deceived reality (DR) terminals, wearable devices, handles, electronic tags, controllers, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and remote surgery. Medical Surgery), wireless terminals, cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), TV Set Top Boxes (STBs), Customer Premise Equipment (CPEs), etc.

[0099] In some embodiments, the network device 110 and the terminal device 120 communicate with each other via some air interface technology, such as a Uu interface.

[0100] For example, there are two communication scenarios between network device 110 and terminal device 120: uplink communication scenario and downlink communication scenario. Uplink communication, or uplink transmission, refers to sending signals or data to network device 110; downlink communication, or downlink transmission, refers to sending signals or data to terminal device 120.

[0101] In some embodiments, the terminal device 120 and the terminal device 130 communicate with each other via some air interface technology, such as a PC5 interface.

[0102] For example, there are two communication scenarios between terminal device 120 and terminal device 130: a first side communication scenario and a second side communication scenario. The first side communication scenario refers to terminal device 120 sending a signal to terminal device 130, while the second side communication scenario refers to terminal device 130 sending a signal to terminal device 120.

[0103] In some embodiments, terminal device 120 and terminal device 130 are both within the network coverage and located in the same cell, or terminal device 120 and terminal device 130 are both within the network coverage but located in different cells, or terminal device 120 is within the network coverage but terminal device 130 is outside the network coverage.

[0104] In some embodiments of the present application, "NR" may also be referred to as a 5G NR system or a 5G system. A 5G mobile communication system may include a non-standalone (NSA) network and / or a standalone (SA) network.

[0105] The technical solutions provided in the embodiments of the present application can also be applied to machine type communication (MTC), long term evolution technology for machine-to-machine communication (LTE-M), device-to-device (D2D) network, machine-to-machine (M2M) network, Internet of Things (IoT) network or other networks. Among them, the IoT network can include, for example, the Internet of Vehicles. Among them, the communication mode in the Internet of Vehicles system is collectively referred to as vehicle to other devices (Vehicle to X, V2X, X can represent anything), for example, the V2X can include: vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to pedestrian communication (V2P) or vehicle to network (V2N) communication, etc.

[0106] The mobile communication system provided in the embodiment of the present application can be applied to but not limited to at least one of the following communication scenarios: an uplink communication scenario, a downlink communication scenario, and a sidelink communication scenario.

[0107] FIG5 shows a flow chart of a random access channel transmission method provided by an exemplary embodiment of the present application. The method is executed by the above-mentioned terminal device, and the method includes:

[0108] Step 230: Send a random access channel according to the relevant parameters of the random access channel when transmitted in the first type of time domain resources and / or the relevant parameters of the random access channel when transmitted in the second type of time domain resources.

[0109] In some embodiments, the time domain resource includes at least one of the following: a symbol, a symbol group, a time slot, a sub-time slot, a frame, and a sub-frame. In the embodiments of the present application, the specific type of the time domain resource is not limited.

[0110] In some embodiments, the first type of time domain resources and the second type of time domain resources can be understood as two different duplex modes, time slots, or symbols. The number, location, size, and frequency domain bandwidth of the available uplink resources in the first type of time domain resources and the second type of time domain resources are different; in other words, the number, location, size, and frequency domain bandwidth of the random access channels in the first type of time domain resources and the second type of time domain resources are different. For example, the first type of time domain resources are SBFD symbols, and the second type of time domain resources are non-SBFD symbols. SBFD symbols are symbols that include at least one of an uplink subband, a downlink subband, and a guard band, while non-SBFD symbols are symbols that do not include any of the above subbands.

[0111] In some embodiments, the relevant parameters include at least one of the following: transmit power; target power level; value of the power ramp counter; value of the random access preamble transmission counter; maximum number of transmissions of the random access preamble; power ramp step of the random access channel; a first parameter, the first parameter is used to indicate the number of random access channel transmission opportunities of frequency division multiplexing in a time unit, for example, a time unit is a time instance; a second parameter, the second parameter is used to indicate the offset value between the lowest random access channel transmission opportunity in the frequency domain and the reference point, the reference point is PRB0 of the uplink BWP, that is, the starting PRB of the uplink BWP. Among them, the transmit power is used to indicate how much energy the terminal device will use to send the random access channel; the target power level is used to indicate the target power of the random access channel expected by the receiver of the network device; the value of the power climb counter is used to indicate the number of power climbs. Generally speaking, after each random access failure, the value of the power climb counter will be increased by 1; the random access preamble transmission counter is used to indicate the number of preamble transmissions during the random access process, that is, the number of random access channel transmissions; the maximum number of random access preamble transmissions is used to indicate the maximum number of preamble transmissions during the entire random access process, that is, the maximum number of random access channel transmissions; the power climb step size of the random access channel is used to indicate the amount of power increase during each power climb.

[0112] For example, as shown in Figure 6, the slashed square 10 represents a random access channel transmission opportunity, and the first parameter is 2, which is used to indicate that the number of random access channel transmission opportunities for frequency division multiplexing in one time unit is 2; if the reference point is PRB0 of the active UL BWP (activated uplink BWP), that is, the starting PRB of the active UL BWP, then the offset value between the lowest random access channel transmission opportunity and PRB0 in the frequency domain dimension in Figure 6 is the second parameter.

[0113] In some embodiments, the relevant parameters of the random access channel during transmission include power-related parameters and / or frequency domain-related parameters.

[0114] In some embodiments, a random access channel transmission opportunity is valid under the following circumstances: the random access channel transmission opportunity is within an uplink symbol; or the random access channel transmission opportunity is within a first type of time domain resource and the random access channel transmission opportunity is located within a first frequency domain bandwidth, for example, the random access channel transmission opportunity is within the first type of time domain resource and the random access channel transmission opportunity is located within the intersection of an uplink subband and an uplink BWP. The first type of time domain resource is an SBFD symbol; the random access channel transmission opportunity being within an uplink symbol means that the symbols where the random access channel transmission opportunity is located are all uplink symbols; the random access channel transmission opportunity being within the first type of time domain resource means that the symbols where the random access channel transmission opportunity is located are all SBFD symbols; that is, if a random access channel transmission opportunity is located in a symbol that includes both an uplink symbol and an SBFD symbol, then the random access channel transmission opportunity is invalid.

[0115] In some embodiments, the first frequency domain bandwidth is a subset of the available uplink bandwidth configured by the network device for the terminal device; the first frequency domain bandwidth is the actual available uplink bandwidth determined in the uplink BWP of the terminal device based on the first duplex mode or the first type of time domain resources. The first duplex mode or the first type of time domain resources may be SBFD.

[0116] In some embodiments, the uplink BWP is an uplink BWP activated for uplink transmissions by the terminal device. The first frequency-domain bandwidth is the entire bandwidth or a portion of the uplink BWP. Due to differences in available uplink subbands in different duplex modes or different time-domain resource types, the first frequency-domain bandwidth may dynamically change even for the same terminal device.

[0117] In some embodiments, the first frequency domain bandwidth may be understood as an available subband in an uplink BWP, an available uplink subband, an actually available subband, or an actually available uplink subband.

[0118] To sum up, the method provided in the embodiment of the present application is that the terminal device sends a random access channel based on the relevant parameters of the random access channel when transmitted in the first type of time domain resources and / or the relevant parameters when transmitted in the second type of time domain resources. That is, the terminal device can determine the relevant parameters for transmission under each time domain resource type for different time domain resource types, and send the random access channel based on the relevant parameters.

[0119] 1. First frequency domain bandwidth

[0120] In an optional embodiment, the first frequency domain bandwidth is a portion of available subbands within the uplink BWP. The first frequency domain bandwidth is the actual available uplink bandwidth of the terminal device. The first frequency domain bandwidth includes at least one of the following:

[0121] Uplink sub-band;

[0122] Uplink BWP;

[0123] Actual subband

[0124] The intersection of the uplink subband and the uplink BWP;

[0125] The real uplink subband is the intersection of the uplink subband (also called nominal subband) and the uplink BWP.

[0126] The real uplink BWP is the intersection of the uplink subband and the uplink BWP.

[0127] The uplink subband portion within the uplink BWP;

[0128] The available uplink subband portion within the uplink BWP;

[0129] The uplink subband portion of the uplink BWP within the first type of time domain resources;

[0130] The available uplink subband portion in the uplink BWP within the first type of time domain resources.

[0131] In some embodiments, the first frequency domain bandwidth is the intersection of the second and third frequency domain bandwidths. The second frequency domain bandwidth is the activated uplink bandwidth configured for the terminal device by the network device or communication protocol. The third frequency domain bandwidth is the uplink subband of the currently used duplex mode or time domain resource type, typically determined by the relevant configuration of the cellular communication system. The intersection of the second and third frequency domain bandwidths is the actual available uplink bandwidth of the terminal device, i.e., the first frequency domain bandwidth.

[0132] The second frequency domain bandwidth can be referred to as any of the following: uplink BWP, uplink bandwidth, activated uplink BWP, activated BWP, activated uplink bandwidth, and the like. The third frequency domain bandwidth can be referred to as any of the following: subband, uplink subband, nominal uplink subband, uplink subband within a frame structure, uplink subband within a first-type time domain resource, and the like. The first-type time domain resource is a time domain resource type that includes uplink subbands and / or downlink subbands. For example, the first-type time domain resource is at least one of an SBFD symbol, an SBFD time slot, and an SBFD subframe.

[0133] The second frequency domain bandwidth is the uplink BWP, the third frequency domain bandwidth is the uplink subband, and the first frequency domain bandwidth is the intersection of the uplink subband and the uplink BWP. Since there are many possibilities for the positions of the uplink BWP and the uplink subband, an exemplary representation is as follows:

[0134] As shown in FIG. 7 , in some examples, the uplink subband completely falls within the uplink BWP, and the first frequency domain bandwidth is the frequency domain bandwidth corresponding to the uplink subband.

[0135] As shown in FIG8 , in some embodiments, the uplink sub-band does not completely fall within the uplink BWP, and the first frequency domain bandwidth is the intersection of the uplink sub-band and the uplink BWP.

[0136] As shown in FIG9 , in some embodiments, the uplink sub-band and the uplink BWP are exactly the same, and the first frequency domain bandwidth is the frequency domain bandwidth corresponding to the uplink sub-band or the uplink BWP.

[0137] In some embodiments, the relevant parameters of the random access channel during transmission include power-related parameters and / or frequency-domain-related parameters. The power-related parameters and frequency-domain-related parameters are respectively introduced in detail below.

[0138] 2.1 Power-related parameters.

[0139] The power-related parameters include at least one of the following parameters: transmit power; target power level; value of power ramp counter; value of random access preamble transmission counter; maximum number of random access preamble transmissions; power ramp step size of random access channel.

[0140] First, two methods of calculating the transmit power are shown.

[0141] Method 1 for calculating transmit power:

[0142] In some embodiments, the target power level includes a first target power level and a second target power level, the first type of time domain resources corresponds to the first target power level, and the second type of time domain resources corresponds to the second target power level; when the random access channel transmission opportunity corresponds to the first type of time domain resources, the random access channel is transmitted, and the first transmit power of the random access channel is determined based on the first target power level; and / or, when the random access channel transmission opportunity corresponds to the second type of time domain resources, the random access channel is transmitted, and the second transmit power of the random access channel is determined based on the second target power level. That is, when the random access channel transmission opportunity used for this transmission corresponds to the first type of time domain resources, the random access channel is transmitted, and the first transmit power of the random access channel is determined based on the first target power level; and / or, when the random access channel transmission opportunity used for this transmission corresponds to the second type of time domain resources, the random access channel is transmitted, and the second transmit power of the random access channel is determined based on the second target power level.

[0143] In some embodiments, the first transmit power is determined based on at least one of a first target power level, a power ramp step, a power ramp counter, and a preamble increment; the second transmit power is determined based on at least one of a second target power level, a power ramp step, a power ramp counter, and a preamble increment; wherein the preamble increment is determined based on at least one of a random access preamble format and a subcarrier spacing.

[0144] In some embodiments, the first transmit power is the sum of the first target power level, the power climb amount and the preamble code increment; the second transmit power is the sum of the second target power level, the power climb amount and the preamble code increment; the power climb amount is determined based on the power climb counter and the power climb step size.

[0145] Exemplarily, the target power level includes a first target power level and a second target power level, the first type of time domain resources corresponds to the first target power level, and the second type of time domain resources corresponds to the second target power level; the maximum number of transmissions of the random access preamble code, the power ramping step of the random access channel, and the preamble code increment are additionally configured by the network device or agreed upon by the communication protocol, that is, the relevant parameters for the first type of time domain resources and the second type of time domain resources {maximum number of transmissions of the random access preamble code, power ramping step of the random access channel, preamble code increment} are the same, the first type of time domain resources are SBFD symbols, and the second type of time domain resources are non-SBFD symbols, the first target power level is recorded as preambleReceivedTargetPowerSBFD, the second target power level is recorded as preambleReceivedTargetPower-nonSBFD, the power ramping step corresponding to the first type of time domain resources and the second type of time domain resources is recorded as PREAMBLE_POWER_RAMPING_STEP, and the preamble code increment corresponding to the first type of time domain resources and the second type of time domain resources is recorded as DELTA_PREAMBLE. The calculation formulas for the first transmit power and the second transmit power are as follows.

[0146] First transmit power=preambleReceivedTargetPowerSBFD+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP.

[0147] Second transmit power=preambleReceivedTargetPower−nonSBFD+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP.

[0148] In some embodiments, the first target power level is the same as or different from the second target power level.

[0149] In summary, the method provided in the embodiment of the present application shows a method for calculating the first transmission power of the random access channel when it is transmitted on the first type of time domain resource and a method for calculating the second transmission power of the random access channel when it is transmitted on the second type of time domain resource, when the first type of time domain resource corresponds to the first target power level and the second type of time domain resource corresponds to the second target power level. This method can determine the different transmission powers of the random access channel when it is transmitted on different types of time domain resources through different related parameters. And because the interference to the terminal device when transmitting the symbols of the first type of time domain resource and the symbols of the second type of time domain resource is different, the link quality in the symbols of different resource types is also different. Using different transmission powers can cope with different interference situations, so that the channel can be correctly received when it reaches the receiver of the network device.

[0150] Method 2 for calculating transmit power:

[0151] In some embodiments, the first type of time domain resources corresponds to at least one of a first power ramp counter, a first random access preamble transmission counter, and a first power ramp step size; and the second type of time domain resources corresponds to at least one of a second power ramp counter, a second random access preamble transmission counter, and a second power ramp step size. That is, the terminal device maintains at least one of a power ramp counter and a random access preamble transmission counter for the first type of time domain resources and the second type of time domain resources, respectively.

[0152] In some embodiments, when a random access channel transmission opportunity corresponds to a first type of time domain resource, a random access channel is transmitted, and a first transmit power of the random access channel is determined based on at least one of a first target power level and a value of a first power escalation counter; and / or, when a random access channel transmission opportunity corresponds to a second type of time domain resource, a random access channel is transmitted, and a second transmit power of the random access channel is determined based on at least one of a second target power level and a value of a second power escalation counter. That is, when a random access channel transmission opportunity used for this transmission corresponds to the first type of time domain resource, a random access channel is transmitted, and the first transmit power of the random access channel is determined based on at least one of the first target power level and a value of the first power escalation counter; and / or, when a random access channel transmission opportunity used for this transmission corresponds to the second type of time domain resource, a random access channel is transmitted, and the second transmit power of the random access channel is determined based on at least one of the second target power level and a value of the second power escalation counter. Exemplarily, the random access channel transmission opportunity corresponds to the first type of time domain resources, which can be understood as the time domain resources where the random access channel transmission opportunity is located belong to the first type of time domain resources; the random access channel transmission opportunity corresponds to the first type of time domain resources, which can be understood as the time domain resources where the random access channel transmission opportunity is located belong to the second type of time domain resources. For example, the first type of time domain resources corresponds to the first power climb counter, the second type of time domain resources corresponds to the second power climb counter, but the first type of time domain resources and the second type of time domain resources share the same target power level; for another example, the first type of time domain resources corresponds to the first target power level, the second type of time domain resources corresponds to the second target power level, but the first type of time domain resources and the second type of time domain resources share the same power climb counter. For another example, the first type of time domain resources corresponds to the first target power level and the first power climb counter, and the second type of time domain resources corresponds to the second target power level and the second power climb counter.

[0153] In some embodiments, when a random access channel transmission opportunity corresponds to a first type of time domain resource, a random access channel is transmitted, and a first transmit power of the random access channel is determined based on the value of a first power ramp counter; when a random access channel transmission opportunity corresponds to a second type of time domain resource, a random access channel is transmitted, and a second transmit power of the random access channel is determined based on the value of a second power ramp counter. Alternatively, when a random access channel transmission opportunity corresponds to a first type of time domain resource, a random access channel is transmitted, and the first transmit power of the random access channel is determined based on a first target power level and a first power ramp step size; when a random access channel transmission opportunity corresponds to a second type of time domain resource, a random access channel is transmitted, and the second transmit power of the random access channel is determined based on a second target power level and a second power ramp step size. Or, when the random access channel transmission opportunity corresponds to the first type of time domain resources, the random access channel is sent, and the first transmission power of the random access channel is determined based on the first target power level, the value of the first power climb counter and the first power climb step; when the random access channel transmission opportunity corresponds to the second type of time domain resources, the random access channel is sent, and the second transmission power of the random access channel is determined based on the second target power level, the value of the second power climb counter and the second power climb step.

[0154] In some embodiments, the first transmit power is determined based on at least one of a first target power level, a first power ramp step, a value of a first power ramp counter, and a preamble increment; the second transmit power is determined based on at least one of a second target power level, a second power ramp step, a value of a second power ramp counter, and a preamble increment; wherein the preamble increment is determined based on at least one of a random access preamble format and a subcarrier spacing.

[0155] In some embodiments, the first transmit power is the sum of the first target power level, the first power climb amount and the preamble code increment, and the first power climb amount is determined based on the value of the first power climb counter and the first power climb step; the second transmit power is the sum of the second target power level, the second power climb amount and the preamble code increment, and the second power climb amount is determined based on the value of the second power climb counter and the second power climb step.

[0156] Illustratively, the target power level includes a first target power level and a second target power level; the power ramp step size includes a first power ramp step size and a second power ramp step size; and the power ramp counter includes a first power ramp counter and a second power ramp counter. The preamble increment is additionally configured by the network device or agreed upon by the communication protocol. The first type of time domain resources are SBFD symbols, and the second type of time domain resources are non-SBFD symbols. The first target power level is recorded as preambleReceivedTargetPowerSBFD, the second target power level is recorded as preambleReceivedTargetPower-nonSBFD, the first power ramp counter is recorded as PREAMBLE_POWER_RAMPING_COUNTER_SBFD, the second power ramp counter is recorded as PREAMBLE_POWER_RAMPING_COUNTER_nonSBFD, the first power ramp step is recorded as PREAMBLE_POWER_RAMPING_STEP_SBFD, the second power ramp step is recorded as PREAMBLE_POWER_RAMPING_STEP_nonSBFD, and the preamble code increment corresponding to the first type of time domain resources and the second type of time domain resources is recorded as DELTA_PREAMBLE. The calculation formulas for the first transmit power and the second transmit power are as follows.

[0157] First transmit power=preambleReceivedTargetPowerSBFD+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER_SBFD−1)×PREAMBLE_POWER_RAMPING_STEP_SBFD.

[0158] Second transmit power=preambleReceivedTargetPower−nonSBFD+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER_nonSBFD−1)×PREAMBLE_POWER_RAMPING_STEP_nonSBFD.

[0159] In some embodiments, the first target power level is the same as or different from the second target power level; and the first power transfer counter is the same as or different from the second power transfer counter.

[0160] In summary, the method provided in the embodiment of the present application shows a method for calculating the first transmission power of the random access channel when it is transmitted on the first type of time domain resource and a method for calculating the second transmission power of the random access channel when it is transmitted on the second type of time domain resource, when the first type of time domain resource corresponds to at least one of the first target power level, the first power climbing counter, and the first power climbing step length, and the second type of time domain resource corresponds to at least one of the second target power level, the second power climbing counter, and the second power climbing step length. This method can determine the different transmission powers of the random access channel when it is transmitted on different time domain resource types through different related parameters. And because the interference to the terminal device in the symbol transmission of the first type of time domain resource and the symbol transmission of the second type of time domain resource is different, the link quality in the symbols of different resource types is also different. Using different transmission powers can cope with different interference situations, so that the channel can be correctly received when it reaches the receiver of the network device.

[0161] In some embodiments, because the time domain resource type used by the terminal device in random access channel transmission is uncertain, the time domain resource type used in the current transmission during the random access process may be the same as or different from the time domain resource type used in the previous transmission. Therefore, the following describes different ways to increase the power ramp counter when the time domain resource type used in the current transmission is the same as or different from the time domain resource type used in the previous transmission.

[0162] In some embodiments, the time domain resource type used in this transmission is different from the time domain resource type used in the previous transmission, which can be expressed as the time domain resource type used in this transmission is the first type of time domain resource, and the time domain resource type used in the previous transmission is the second type of time domain resource; and / or, the time domain resource type used in this transmission is the second type of time domain resource, and the time domain resource type used in the previous transmission is the first type of time domain resource. For example, when the first type of time domain resource is an SBFD symbol and the second type of time domain resource is a non-SBFD symbol, since the interference of the SBFD link is more severe, when the first type of time domain resource and the second type of time domain resource share the same power ramp counter, in the case of a transition from a non-SBFD symbol to an SBFD symbol, that is, when the time domain resource type used in the current transmission is an SBFD symbol and the time domain resource type used in the previous transmission is a non-SBFD symbol, the power ramp counter is kept unchanged or reset or initialized; in the case of a transition from an SBFD symbol to a non-SBFD symbol, that is, when the time domain resource type used in the current transmission is a non-SBFD symbol and the time domain resource type used in the previous transmission is an SBFD symbol, the power ramp counter is incremented by 1. Optionally, when the time domain resource type used in the current transmission is the same as the time domain resource type used in the previous transmission, the power ramp counter is incremented by 1.

[0163] In some embodiments, the time domain resource type used in this transmission is different from the time domain resource type used in the previous transmission, which may only include: the time domain resource type used in this transmission is the first type of time domain resource, and the time domain resource type used in the previous transmission is the second type of time domain resource; in some embodiments, the time domain resource type used in this transmission is different from the time domain resource type used in the previous transmission, which may only include: the time domain resource type used in this transmission is the second type of time domain resource, and the time domain resource type used in the previous transmission is the first type of time domain resource.

[0164] Climbing method 1: The power climbing counter remains unchanged.

[0165] During random access channel transmission, the terminal device uses only one power ramp counter for both the first type of time domain resources and the second type of time domain resources. For random access channel transmission, if the corresponding time domain resource type changes compared to the previous transmission, the power ramp counter remains unchanged; or, if the time domain resource type used for the current random access channel transmission changes compared to the time domain resource type used for the previous transmission, the power ramp counter remains unchanged. It should be noted that "maintaining the power ramp counter unchanged when the time domain resource type used for the current random access channel transmission changes from that used for the previous transmission" is a different way of expressing the same meaning as "maintaining the power ramp counter unchanged when the time domain resource type used for the current random access channel transmission changes from that used for the previous transmission." That is, "maintaining the power ramp counter unchanged when the time domain resource type used for the current random access channel transmission changes from that used for the previous transmission" is equivalent to "maintaining the power ramp counter unchanged when the time domain resource type used for the current random access channel transmission changes from that used for the previous transmission." For example, if there are n random access transmissions, and the time domain resource type corresponding to the random access channel transmission opportunity used for the i-th transmission is different from the time domain resource type corresponding to the random access channel transmission opportunity used for the (i-1)-th transmission, then the power ramp counter of the random access channel used for the i-th transmission remains unchanged compared to the power ramp counter of the random access channel used for the (i-1)-th transmission.

[0166] In some embodiments, for random access channel transmission, if the corresponding time domain resource type is changed compared to the initial transmission, the power ramp counter remains unchanged; or, if the time domain resource type used for the current transmission of the random access channel is changed compared to the time domain resource type used for the initial transmission, the power ramp counter remains unchanged. For example, if there are n random access transmissions, and the time domain resource type corresponding to the random access channel transmission opportunity used for the i-th transmission is different from the time domain resource type corresponding to the random access channel transmission opportunity used for the initial transmission, then the power ramp counter of the random access channel used for the i-th transmission remains unchanged compared to the power ramp counter of the random access channel used for the (i-1)-th transmission. That is, for random access channel retransmissions, if the corresponding time domain resource type is changed compared to the previous transmission or the initial transmission, the power ramp counter remains unchanged.

[0167] Exemplarily, as shown in FIG10 , during the initial transmission, the first retransmission, and the second retransmission, the time domain resource type used is all first-type time domain resources. In this case, the power ramp counter increments by 1 after each retransmission. Optionally, during the initial transmission, the power ramp counter is initialized to an initial value of 1. That is, during the initial transmission, the power ramp counter is 1. During the first retransmission, since the time domain resource type corresponding to random access channel transmission opportunity 12 used in the first retransmission and the time domain resource type corresponding to random access channel transmission opportunity 11 used in the previous transmission, i.e., the initial transmission, are both first-type time domain resources, the power ramp counter increments by 1, and the power ramp counter is now 2. During the second retransmission, since the time domain resource type corresponding to random access channel transmission opportunity 13 used in the second retransmission and the time domain resource type corresponding to random access channel transmission opportunity 12 used in the previous transmission, i.e., the first retransmission, are both first-type time domain resources, the power ramp counter increments by 1, and the power ramp counter is now 3. During the third retransmission, since the time domain resource type corresponding to random access channel transmission opportunity 14 used in the third retransmission is the second type of time domain resource, which is different from the time domain resource type corresponding to random access channel transmission opportunity 13 used in the previous transmission, i.e., the second retransmission, the power ramp counter remains unchanged, i.e., the power ramp counter is still 3 during the third retransmission. During the fourth retransmission, since the time domain resource type corresponding to random access channel transmission opportunity 15 used in the fourth retransmission is the same as the time domain resource type corresponding to random access channel transmission opportunity 14 used in the previous transmission, i.e., the third retransmission, both are second type of time domain resources, the power ramp counter is incremented by 1, and the power ramp counter is now 4.

[0168] To sum up, the method provided in the embodiment of the present application, when the time domain resource type used in random access channel transmission is different from the time domain resource type used in the previous transmission, the power climb counter remains unchanged. This method of calculating the transmission power takes into account the interference level and the random access delay.

[0169] Climbing method 2: Power climbing counter reset or initialization.

[0170] During random access channel transmission, the terminal device uses only one power ramp counter for the first type of time domain resources and the second type of time domain resources. For random access channel transmission, if the corresponding time domain resource type changes compared to the previous transmission, the power ramp counter is reset or initialized; or, if the time domain resource type used for the current random access channel transmission changes compared to the time domain resource type used for the previous transmission, the power ramp counter is reset or initialized. It should be noted that "resetting or initializing the power ramp counter when the time domain resource type used for the current random access channel transmission changes from that used for the previous transmission" is a different way of expressing the same meaning as "resetting or initializing the power ramp counter when the time domain resource type used for the current random access channel transmission changes from that used for the previous transmission." That is, "resetting or initializing the power ramp counter when the time domain resource type used for the current random access channel transmission changes from that used for the previous transmission" is equivalent to "resetting or initializing the power ramp counter when the time domain resource type used for the current random access channel transmission changes from that used for the previous transmission." For example, if there are n random access transmissions, and the time domain resource type corresponding to the random access channel transmission opportunity used for the i-th transmission is different from the time domain resource type corresponding to the random access channel transmission opportunity used for the (i-1)th transmission, the power ramp counter for the random access channel used for the i-th transmission is reset or initialized.

[0171] In some embodiments, for random access channel transmission, if the corresponding time domain resource type is changed compared to the initial transmission, the power climb counter is reset or initialized; or, if the time domain resource type used for the current transmission of the random access channel is changed compared to the time domain resource type used for the initial transmission, the power climb counter is reset or initialized. For example, if there are n random access transmissions, if the time domain resource type corresponding to the random access channel transmission opportunity used for the i-th transmission is different from the time domain resource type corresponding to the random access channel transmission opportunity used for the initial transmission, the power climb counter of the random access channel used for the i-th transmission is reset or initialized. That is, for random access channel retransmission, if the corresponding time domain resource type is changed compared to the previous transmission or the initial transmission, the power climb counter is reset or initialized.

[0172] For example, as shown in FIG11 , during the initial transmission, the first retransmission, and the second retransmission, the time domain resource type used is all first-type time domain resources. In this case, the power ramp counter increments by 1 after each retransmission. Optionally, during the initial transmission, the power ramp counter is initialized to an initial value of 1. That is, during the initial transmission, the power ramp counter is 1. During the first retransmission, because the time domain resource type corresponding to random access channel transmission opportunity 17 used in the first retransmission and the time domain resource type corresponding to random access channel transmission opportunity 16 used in the previous transmission, i.e., the initial transmission, are both first-type time domain resources, the power ramp counter increments by 1, and the power ramp counter is now 2. During the second retransmission, because the time domain resource type corresponding to random access channel transmission opportunity 18 used in the second retransmission and the time domain resource type corresponding to random access channel transmission opportunity 17 used in the previous transmission, i.e., the first retransmission, are both first-type time domain resources, the power ramp counter increments by 1, and the power ramp counter is now 3. During the third retransmission, since the time domain resource type corresponding to random access channel transmission opportunity 19 used in the third retransmission is the second type of time domain resource, which is different from the time domain resource type corresponding to random access channel transmission opportunity 18 used in the previous transmission, i.e., the second retransmission, the power ramp counter is reset or initialized. For example, the power ramp counter is reset to 1, i.e., the power ramp counter is reset to 1 during the third retransmission. During the fourth retransmission, since the time domain resource type corresponding to random access channel transmission opportunity 20 used in the fourth retransmission is the same as the time domain resource type corresponding to random access channel transmission opportunity 19 used in the previous transmission, i.e., the third retransmission, both are second type of time domain resources, the power ramp counter is incremented by 1, and the power ramp counter is now 2.

[0173] To sum up, the method provided in the embodiment of the present application resets or initializes the power climb counter when the time domain resource type used in the random access channel transmission is different from the time domain resource type used in the previous transmission. This method of calculating the transmit power can minimize the interference to other links caused by the random access process performed after the time domain resource type changes. However, this method resets or initializes the power climb counter, which may cause the UE to need to perform multiple retransmissions, that is, power climbs, in order to achieve the transmit power required to successfully complete the random access, which may in turn increase the random access delay.

[0174] Climbing method three: the power climbing counters corresponding to the first type of time domain resources and the second type of time domain resources are different.

[0175] During the transmission process of the random access channel, the terminal device uses a power climb counter for the first type of time domain resources and the second type of time domain resources respectively, uses the first power climb counter for the first type of time domain resources, and uses the second power climb counter for the second type of time domain resources. When transmitting, the corresponding power climb counter is selected according to the type of time domain resources used during transmission.

[0176] In some embodiments, the terminal device also uses a random access preamble code transmission counter for the first type of time domain resources and the second type of time domain resources respectively. The first random access preamble code transmission counter is used for the first type of time domain resources, and the second random access preamble code transmission counter is used for the second type of time domain resources. When transmitting, the corresponding power ramp counter is selected according to the type of time domain resources used during transmission.

[0177] That is, the first type of time domain resources corresponds to at least one of a first power ramp counter and a first random access preamble transmission counter; the second type of time domain resources corresponds to at least one of a second power ramp counter and a second random access preamble transmission counter.

[0178] In some embodiments, at the start of a random access procedure, at least one of a first power ramp counter, a first random access preamble transmission counter, a second power ramp counter, and a second random access preamble transmission counter is initialized. If random access channel transmission fails and the random access channel corresponds to a first type of time domain resource, the first random access preamble transmission counter is incremented by 1. If random access channel transmission fails and the random access channel corresponds to a second type of time domain resource, the second random access preamble transmission counter is incremented by 1. If the random access channel corresponds to the first type of time domain resource and the value of the first random access preamble transmission counter is greater than a first initial value, the first power ramp counter is incremented by 1. If the random access channel corresponds to the second type of time domain resource and the value of the second random access preamble transmission counter is greater than a second initial value, the second power ramp counter is incremented by 1. Random access channel transmission failure indicates that if the RAR window times out but no random access response including the first random access preamble identifier is received or contention resolution fails, the random access channel transmission is deemed to have failed. The first random access preamble identifier matches a random access channel preamble index (PRACH preamble index) sent by the terminal.

[0179] In some embodiments, the first power ramp counter and / or the second power ramp counter are updated before random access channel transmission; the first random access preamble transmission counter and / or the second random access preamble transmission counter are updated after random access channel transmission.

[0180] Exemplarily, as shown in FIG12 , when the random access process is started, the first power climb counter, the first random access preamble transmission counter, the second power climb counter, and the second random access preamble transmission counter are all initialized to 1; during the initial transmission, since the time domain resource type corresponding to the random access channel transmission opportunity 21 used in the initial transmission is the first type of time domain resource, but the first random access preamble transmission counter is 1, that is, the first initial value, the first power climb counter remains unchanged, or since the first power climb counter is initialized for the first time using the first type of time domain resource, the first power climb counter is 1 at this time. After the initial transmission is completed, due to the failure of the initial transmission and the initial transmission using The time domain resource type corresponding to the random access channel transmission opportunity 21 used for the first retransmission is the first type of time domain resource, the first random access preamble transmission counter is increased by 1, and the first random access preamble counter is 2 at this time; during the first retransmission, since the time domain resource type corresponding to the random access channel transmission opportunity 22 used for the first retransmission is the first type of time domain resource, and the first random access preamble transmission counter is greater than the first initial value, the first power climb counter is increased by 1, and the first power climb counter is 2 at this time. After the first retransmission ends, since the first retransmission fails and the time domain resource type corresponding to the random access channel transmission opportunity 22 used for the first retransmission is the first resource type, the first random The access preamble transmission counter is increased by 1, and the first random access preamble transmission counter is 3 at this time; during the second retransmission, since the time domain resource type corresponding to the random access channel transmission opportunity 23 used in the second retransmission is the second type of time domain resource, but the second random access preamble transmission counter is 1, which is the second initial value, the second power climb counter remains unchanged, or since the second power climb counter is initialized using the second type of time domain resource for the first time, the second power climb counter is 1 at this time. After the second retransmission ends, since the second retransmission fails and the time domain resource type corresponding to the random access channel transmission opportunity 23 used in the second retransmission is the second type of time domain resource, the second power climb counter remains unchanged. The second random access preamble transmission counter is incremented by 1, and the second random access preamble transmission counter is 2 at this time; during the third retransmission, since the time domain resource type corresponding to the random access channel transmission opportunity 24 used for the third retransmission is the second type of time domain resource, and the second random access preamble transmission counter is greater than the second initial value, the second power climb counter is incremented by 1, and the second power climb counter is 2 at this time. After the second retransmission ends, since the second retransmission fails and the time domain resource type corresponding to the random access channel transmission opportunity 24 used for the second retransmission is the second resource type, the second random access preamble transmission counter is incremented by 1, and the second random access preamble transmission counter is 3 at this time;During the fourth retransmission, because the time domain resource type corresponding to random access channel transmission opportunity 25 used in the fourth retransmission is the first type of time domain resource and the value of the first random access preamble transmission counter is greater than the first initial value, the first power ramp counter is incremented by 1, and the first power ramp counter is now 3. After the fourth retransmission ends, because the fourth retransmission fails and the time domain resource type corresponding to random access channel transmission opportunity 25 used in the fourth retransmission is the first type of time domain resource, the first random access preamble counter is incremented by 1, and the first random access preamble transmission counter is now 4.

[0181] To sum up, the method provided in the embodiment of the present application configures different power climb counters for the first type of time domain resources and the second type of time domain resources, which can shorten the delay of random access to a certain extent. However, since the terminal needs to maintain two sets of power climb counters, it is easy to cause a burden on the terminal device, resulting in a higher complexity of the random access process corresponding to the terminal device.

[0182] Climbing method 4: No change is expected in the time domain resource type corresponding to the random access channel.

[0183] In some embodiments, the initial and retransmissions of the random access channel correspond to the same time domain resource type; or, the terminal device does not expect the time domain resource type corresponding to the retransmission of the random access channel to change relative to the initial transmission or the previous transmission; or, the terminal device does not expect the time domain resource type corresponding to the retransmission of the random access channel to be different from the time domain resource type corresponding to the initial transmission of the random access channel or the previous transmission of the random access channel. In other words, when selecting a random access channel transmission opportunity, the terminal device uses the same time domain resource type as the initial transmission.

[0184] To sum up, the method provided in the embodiment of the present application always uses the same time domain resource type during the random access process, and can also complete the random access process when there are two time domain resource types, avoiding the problem of interference caused by switching symbol types that cannot be judged. Since this method needs to wait for the random access resource of the desired time domain resource type, the random access delay is relatively high.

[0185] In an optional embodiment, the above-mentioned calculation method and ramping method of the transmit power may be implemented as independent embodiments or combined embodiments. For example, the first method for calculating the transmit power can be implemented independently, and when the time domain resource type corresponding to the random access channel changes, the power climb counter is increased by 1; the first method for calculating the transmit power is implemented in combination with the first climbing method, and the same power climb counter is set for the first type of time domain resources and the second type of time domain resources, and when the time domain resource type corresponding to the random access channel changes, the power climb counter remains unchanged; or, the second method for calculating the transmit power is implemented in combination with the second climbing method, and the same power climb counter is set for the first type of time domain resources and the second type of time domain resources, and when the time domain resource type corresponding to the random access channel changes, the power climb counter is reset or initialized; or, the first method for calculating the transmit power is implemented in combination with the fourth climbing method, and the same power climb counter is set for the first type of time domain resources and the second type of time domain resources, and the random access channel corresponding to the same time domain resource type is used in each transmission; or, the first method for calculating the transmit power is implemented in combination with the third climbing method, and a power climb counter and a random access preamble code transmission are maintained for the first type of time domain resources and the second type of time domain resources, respectively. Counter; or, the second method for calculating the transmit power is implemented in combination with the third method for climbing, and for the first type of time domain resources and the second type of time domain resources, a power climbing counter and a random access preamble transmission counter are maintained respectively; or, the first method for calculating the transmit power is implemented in combination with the second method for calculating the transmit power, the first type of time domain resources corresponds to the first target power level, and the first type of time domain resources corresponds to at least one of the first power climbing counter, the first random access preamble transmission counter, and the first power climbing step; the second type of time domain resources corresponds to the second target power level, and the second type of time domain resources corresponds to at least one of the second power climbing counter, the second random access preamble transmission counter, and the second power climbing step; or, the first method for calculating the transmit power can be implemented in combination with the fourth method for climbing, and the terminal device expects that the time domain resource type corresponding to each random access channel transmission is the same. After each random access channel transmission fails, the power climbing counter is increased by 1, and the transmit power is calculated using the first method for calculating the transmit power; or, the second method for calculating the transmit power can be implemented in combination with the fourth method for climbing.

[0186] 2.2 Frequency domain related parameters.

[0187] The frequency domain related parameters include at least one of the following parameters: a first parameter and a second parameter; the first parameter is used to indicate the number of random access channel transmission opportunities of frequency division multiplexing in a time unit, for example, a time unit is a time instance; the second parameter is used to indicate the offset value between the lowest random access channel transmission opportunity and the reference point in the frequency domain, and the reference point is PRB0 of the uplink BWP, that is, the starting PRB of the uplink BWP; the first parameter can be expressed as msg1-FDM, and the second parameter can be expressed as msg1-FrequencyStart.

[0188] In some embodiments, the first parameter corresponding to the first type of time domain resources is the same as or different from the first parameter corresponding to the second type of time domain resources; and / or, the second parameter corresponding to the first type of time domain resources is the same as or different from the second parameter corresponding to the second type of time domain resources.

[0189] For example, as shown in FIG13 , the first parameter corresponding to the first type of time domain resources can be recorded as msg1-FDMSBFD, the second parameter corresponding to the first type of time domain resources can be recorded as msg1-FrequencyStartSBFD, the first parameter corresponding to the second type of time domain resources can be recorded as msg1-FDMNonSBFD, and the second parameter corresponding to the second type of time domain resources can be recorded as msg1-FrequencyStartNonSBFD. In FIG13 , based on the parameters configured in the first configuration: msg1-FDMSBFD = 2, msg1-FrequencyStartSBFD = N1, a group of random access channel transmission opportunities 26 located in the uplink subband is selected, and the group of random access channel transmission opportunities 26 includes 4 random access channel transmission opportunities. Based on the parameters configured in the second configuration: msg1-FDMNonSBFD = 4, msg1-FrequencyStartNonSBFD = N2, a group of random access channel transmission opportunities 27 is selected, and the group of random access channel transmission opportunities 27 includes 8 random access channel transmission opportunities.

[0190] In summary, the method provided in the embodiment of the present application performs frequency domain configuration for the first type of time domain resources and the second type of time domain resources respectively, in a flexible manner, which can not only ensure that all random access channel transmission opportunities are valid, but also ensure that the random access channel transmission opportunities are at both ends of the uplink BWP or uplink subband, thereby avoiding resource fragmentation.

[0191] In some embodiments, the network device provides differentiated configurations for the terminal device for the first type of time domain resources and / or the second type of time domain resources. There are two configuration methods, which are described below.

[0192] 3.1 Configuration method 1

[0193] In an optional embodiment based on FIG5 , the method further includes:

[0194] Step 210: Receive a first configuration and a second configuration, where the first configuration and the second configuration are used to configure relevant parameters during random access channel transmission, the first configuration corresponds to a first type of time domain resource, and the second configuration corresponds to a second type of time domain resource.

[0195] In some embodiments, the time domain resources include at least one of the following: a symbol, a symbol group, a time slot, a sub-time slot, a frame, and a subframe. In the embodiments of the present application, the specific type of time domain resources is not limited. For example, the first configuration corresponds to a first type of symbol, and the second configuration corresponds to a second type of symbol. For example, the first configuration corresponds to an SBFD symbol, and the second configuration corresponds to a non-SBFD symbol. An SBFD symbol is a symbol that includes at least one of an uplink subband, a downlink subband, and a guard band, while a non-SBFD symbol is a symbol that does not include any of the above subbands.

[0196] In some embodiments, the configuration of the random access channel includes at least one of a power configuration and a frequency domain configuration. The power configuration is used to configure power-related parameters during random access channel transmission, and the frequency domain configuration is used to configure frequency-related parameters during random access channel transmission. The first configuration includes at least one of a first power configuration and a first frequency domain configuration; the second configuration includes at least one of a second power configuration and a second frequency domain configuration. The configuration items included in the first configuration and the second configuration are the same, that is, when the first configuration includes the first power configuration, the second configuration should also include the second power configuration; when the first configuration includes the first frequency domain configuration, the second configuration should also include the second frequency domain configuration; when the first configuration includes the first power configuration and the first frequency domain configuration, the second configuration should also include the second power configuration and the second frequency domain configuration.

[0197] In some embodiments, the power configuration includes at least one of the following related parameters: target power level; maximum number of transmissions of the random access preamble code; power ramp step size of the random access channel; that is, either the first configuration or the second configuration includes at least one of the following related parameters: target power level; maximum number of transmissions of the random access preamble code; power ramp step size of the random access channel.

[0198] In some embodiments, the power-related parameters include at least one of the following parameters: transmit power; target power level; value of the power ramp counter; value of the random access preamble transmission counter; maximum number of transmissions of the random access preamble; power ramp step of the random access channel. The first part of the related parameters is based on additional configuration of the network device or protocol agreement, and the second part of the parameters is selected, calculated or determined by the terminal device based on the first part of the parameters. Exemplarily, the power-related parameters are configured through configuration method 1, and any one of the first configuration and the second configuration includes at least one of the following parameters: target power level, maximum number of transmissions of the random access preamble, and power ramp step of the random access channel.

[0199] In some embodiments, the first configuration includes a first target power level and the second configuration includes a second target power level.

[0200] In some embodiments, the first configuration further includes a first power ramp step length, and the second configuration further includes a second power ramp step length, wherein the first power ramp step length is the same as or different from the second power ramp step length.

[0201] In some embodiments, the first configuration further includes a first maximum number of times, which is the maximum number of times a random access preamble is transmitted corresponding to the first type of time domain resources; the second configuration further includes a second maximum number of times, which is the maximum number of times a random access preamble is transmitted corresponding to the second type of time domain resources. The first maximum number of times is the same as or different from the second maximum number of times.

[0202] In some embodiments, the first configuration and the second configuration only include parameters with different values, wherein the parameters with the same values ​​in the first configuration and the second configuration can be additionally configured by the network device or agreed upon by the communication protocol; for example, the first configuration includes a first target power level, the second configuration includes a second target power level, the maximum number of transmissions of the random access preamble code and the power climbing step of the random access channel are additionally configured by the network device or agreed upon by the communication protocol; or, the first configuration includes the first target power level and the first power climbing step, the second configuration includes the second target power level and the second power climbing step, the maximum number of transmissions of the random access preamble code is additionally configured by the network device or agreed upon by the communication protocol; or, the first configuration includes the first target power level and the first maximum number, the second configuration includes the second target power level and the second maximum number, and the power climbing step of the random access channel is additionally configured by the network device or agreed upon by the communication protocol; or, the first configuration includes the first target power level, the first maximum number and the first power climbing step, and the second configuration includes the second target power level, the second maximum number and the second power climbing step.

[0203] In some embodiments, the first configuration and the second configuration include all parameters. That is, the first configuration includes a first target power level, a first maximum number of times, and a first power ramp step size, while the second configuration includes a second target power level, a second maximum number of times, and a second power ramp step size. The first maximum number of times and the second maximum number of times may be the same or different, and the first power ramp step size and the second power ramp step size may be the same or different.

[0204] In some embodiments, the frequency domain configuration includes at least one of the following related parameters: a first parameter, the first parameter is used to indicate the number of random access channel transmission opportunities for frequency division multiplexing in one time unit; a second parameter, the second parameter is used to indicate the offset value between the lowest random access channel transmission opportunity in the frequency domain and the reference point, and the reference point is PRB0 of the uplink BWP, that is, the starting PRB of the uplink BWP; that is, either the first configuration and the second configuration includes at least one of the following related parameters: the first parameter, the first parameter is used to indicate the number of random access channel transmission opportunities for frequency division multiplexing in one time unit; the second parameter, the second parameter is used to indicate the offset value between the lowest random access channel transmission opportunity in the frequency domain and the reference point, and the reference point is PRB0 of the uplink BWP.

[0205] In some embodiments, the first configuration and the second configuration share some related parameters. Exemplarily, as shown in Figure 14, the terminal device uses a set of power climb counters and preamble transmission counters for the first configuration and the second configuration. At this time, the shared related parameters corresponding to the first configuration and the second configuration are the power climb counter and the preamble transmission counter. The first configuration includes at least one of the following: a first target power level, a first maximum number of times, a first power climb step, a first parameter 1, and a second parameter 1. The second configuration includes at least one of the following: a second target power level, a second maximum number of times, a second power climb step, a first parameter 2, and a second parameter 2. Among them, the first target power level and the second target power level are usually different. The first maximum number and the second maximum number may be the same or different, the first power climb step and the second power climb step may be the same or different, the first parameter 1 and the first parameter 2 may be the same or different, and the second parameter 1 and the second parameter 2 may be the same or different.

[0206] In some embodiments, the first configuration and the second configuration do not share relevant parameters. For example, as shown in FIG15 , the terminal device uses a set of power ramp counters and preamble transmission counters for the first configuration and the second configuration, respectively. The first configuration includes at least one of the following: a first target power level, a first maximum number of times, a first power ramp step size, a first power ramp counter, a first preamble transmission counter, a first parameter 1, and a second parameter 1. The second configuration includes at least one of the following: a second target power level, a second maximum number of times, a second power ramp step size, a second power ramp counter, a second preamble transmission counter, a first parameter 2, and a second parameter 2. The first target power level and the second target power level are typically different. The first maximum number and the second maximum number of times can be the same or different, the first power ramp step size and the second power ramp step size can be the same or different, the first power ramp counter and the second power ramp counter are typically different, the first preamble transmission counter and the second preamble transmission counter are typically different, the first parameter 1 and the first parameter 2 can be the same or different, and the second parameter 1 and the second parameter 2 can be the same or different.

[0207] In some embodiments, a first configuration parameter and a second configuration parameter are received, the first configuration parameter corresponds to the first configuration, and the second configuration parameter corresponds to the second configuration; or, a first configuration parameter and an offset value are received, the first configuration parameter corresponds to the first configuration, and the configuration parameter after the first configuration parameter is offset based on the offset value corresponds to the second configuration; or, a second configuration parameter and an offset value are received, the second configuration parameter corresponds to the second configuration, and the configuration parameter after the second configuration value parameter is offset based on the offset value corresponds to the first configuration; or, the first configuration parameter is received, the first configuration parameter corresponds to the first configuration; or, the second configuration parameter is received, and the second configuration parameter corresponds to the second configuration. Exemplarily, the first configuration parameter includes a first target power level, and the second configuration parameter includes a second target power level; or, the first configuration includes a first target power level, and the offset value includes a target power level offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset; or, the first configuration includes a first target power level and a first power climbing step, and the offset value includes a target power level offset and a power climbing step offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset, and the second power climbing step corresponding to the second configuration is the sum of the first target power climbing step and the power climbing step offset.

[0208] In some embodiments, a part of the related parameters are configured by a first configuration parameter and a second configuration parameter; another part of the related parameters are configured by a first configuration parameter and an offset value; or, the first part of the related parameters are configured by a first configuration parameter and a second configuration parameter, the second part of the related parameters are configured by a first configuration parameter and an offset value, and the third part of the related parameters are based on additional configuration of the network device or protocol agreement. For example, the related parameters include a target power level, a maximum number of transmissions of a random access preamble, and a power ramp step of a random access channel; for the target power level, the first configuration parameter (i.e., the first target power level) and the second configuration parameter (i.e., the second target power level) are used for configuration; or, based on additional configuration of the network device or protocol agreement; or, the first configuration parameter (i.e., the first target power level) and the offset value (i.e., the target power level offset) are used for configuration; for the maximum number of transmissions of a random access preamble, the first configuration parameter (i.e., the first maximum number) and the second configuration parameter (i.e., the second target power level) are used for configuration. Configuration is performed using the first configuration parameter (i.e., the second maximum number of times); or, based on additional configuration of the network device or protocol agreement; or, using the first configuration parameter (i.e., the first maximum number of times) and the offset value (i.e., the maximum number offset) for configuration; for the power ramp step of the random access channel, the first configuration parameter (i.e., the first power ramp step) and the second configuration parameter (i.e., the second power ramp step) are configured; or, based on additional configuration of the network device or protocol agreement; or, using the first configuration parameter (i.e., the first power ramp step) and the offset value (i.e., the power ramp step offset) for configuration.

[0209] Exemplarily, the first configuration parameter includes a first target power level, and the second configuration parameter includes a second target power level; or, the first configuration includes a first target power level, and the offset value includes a target power level offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset; or, the first configuration includes a first target power level and a first power climbing step, and the offset value includes a target power level offset and a power climbing step offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset, and the second power climbing step corresponding to the second configuration is the sum of the first target power climbing step and the power climbing step offset.

[0210] For example, if the second configuration parameter is the second target power level, denoted as preambleReceivedTargetPower, and the offset value is the target power level offset, denoted as delta_SBFD, then the first target power level corresponding to the first configuration is preambleReceivedTargetPower + delta_SBFD. The calculation formulas for the first and second transmit powers are as follows.

[0211] First transmit power=preambleReceivedTargetPower+delta_SBFD+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP.

[0212] Second transmit power=preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP.

[0213] In an optional embodiment, the power configuration of the random access channel can also be implemented as follows: if the time domain resource type used in the current transmission is different from the time domain resource type used in the previous transmission, the power ramp counter is incremented by 1; an offset count is set, recorded as counter_SBFD, and when the time domain resource type used in the initial transmission is the first type of time domain resource, the offset count is initialized to 1; when the time domain resource type used in the initial transmission is the second type of time domain resource, the offset count is initialized to 0; when the time domain resource type used in the retransmission is the first type of time domain resource, the offset count is incremented by 1, that is, counter_SBFD + 1. In this case, the calculation formulas for the first transmit power and the second transmit power are as follows.

[0214] First transmit power=preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP+counter_SBFD×delta_SBFD.

[0215] Second transmit power=preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP.

[0216] To sum up, the method provided in the embodiment of the present application provides the terminal device with a first configuration and a second configuration of the random access channel, so that the terminal device can use the first configuration or the second configuration for random access. Since the first configuration corresponds to the first type of time domain resources and the second configuration corresponds to the second type of time domain resources; this enables the terminal device to select different configurations for different time domain resource types during the random access process.

[0217] 3.2 Configuration method 2.

[0218] In an optional embodiment based on FIG5 , the method includes:

[0219] Step 220: Receive a third configuration, where the third configuration is used to configure relevant parameters during random access channel transmission, and the third configuration corresponds to the first type of time domain resources and the second type of time domain resources.

[0220] In some embodiments, when configuring frequency domain related parameters of the random access channel, a set of configurations, ie, a third configuration, may be used in common for the first type of time domain resources and the second type of time domain resources.

[0221] In some embodiments, the third configuration includes a second parameter; the second parameter is used to indicate an offset value between a lowest random access channel transmission opportunity in the frequency domain and a reference point. For the first type of time domain resources, the reference point is the lowest PRB of the first frequency domain bandwidth in the frequency domain; and for the second type of time domain resources, the reference point is PRB0 of the uplink BWP.

[0222] In some embodiments, the third configuration further includes a first parameter, where the first parameter is used to indicate the number of frequency division multiplexing random access channel transmission opportunities in a time unit, for example, a time unit is a time instance.

[0223] Exemplarily, as shown in FIG16 , the third configuration includes a first parameter and a second parameter, the first parameter can be recorded as msg1-FDM, and the second parameter can be recorded as msg1-FrequencyStart. In FIG16 , based on the parameters msg1-FDM=2 and msg1-FrequencyStart=0 configured in the third configuration, a group of random access channel transmission opportunities 28 of the first type of time domain resources and a group of random access channel transmission opportunities 29 of the second type of time domain resources are selected, wherein the group of random access channel transmission opportunities 28 includes 4 random access channel transmission opportunities, and the group of random access channel transmission opportunities 29 includes 4 random access channel transmission opportunities. The reference point for the first type of time domain resources is recorded as reference point 30, and the reference point for the second type of time domain resources is recorded as reference point 31. Reference point 30 is the lowest PRB of the intersection of the uplink subband and the uplink BWP in the frequency domain dimension, and reference point 31 is PRB0 of the uplink BWP.

[0224] In summary, the method provided in the embodiments of the present application shares a set of configurations for first-type time-domain resources and second-type time-domain resources, thereby reducing signaling overhead. The terminal device only needs to maintain one set of configurations and interpret the first-type time-domain resources and second-type time-domain resources differently, ensuring that all random access channel transmission opportunities are valid and that the random access channel transmission opportunities are at both ends of the uplink BWP or uplink subband, thus avoiding resource fragmentation.

[0225] In some embodiments, the random access channel transmission method illustrated in step 210 and the random access channel transmission method illustrated in step 220 can be implemented in combination. That is, a portion of the relevant parameters can be configured using configuration method one, while another portion can be configured using configuration method two; or, a first portion of the relevant parameters can be configured using configuration method one, a second portion can be configured using configuration method two, and a third portion can be configured based on additional network device configuration or protocol agreement. For example, configuration method one can be used for power configuration, while configuration method two can be used for frequency domain configuration; or, for the frequency domain configuration of the random access channel, a first type of time domain resource corresponds to a first configuration, a second type of time domain resource corresponds to a second configuration, the first configuration and the second configuration include a first parameter, and the value of the first parameter corresponding to the first configuration is the same as or different from the value of the first parameter corresponding to the second configuration; the first type of time domain resource and the second type of time domain resource correspond to a third configuration, the third configuration includes a second parameter, and the third configuration has different interpretation methods for the first type of time domain resource and the second type of time domain resource. That is, the number of random access channel transmission opportunities corresponding to the first type of time domain resources and the number of random access channel transmission opportunities corresponding to the second type of time domain resources are determined according to the method shown in step 210, and the positions of the random access channel transmission opportunities corresponding to the first type of time domain resources and the second type of time domain resources are determined according to the method shown in step 220. Steps 210 and 220 may be implemented as independent embodiments or as a combined embodiment. When steps 210 and 220 are implemented as a combined embodiment, steps 210 and 220 may be swapped in order or performed simultaneously.

[0226] In some embodiments, a corresponding random access failure judgment method is designed for the situation where the terminal device uses a random access preamble code transmission counter for the first type of time domain resources and the second type of time domain resources respectively.

[0227] In some embodiments, a random access problem is reported based on a first random access preamble transmission counter and a first threshold, or a second random access preamble transmission counter and a second threshold, the first threshold is related to a first maximum number of times, which is the maximum number of transmissions of a random access preamble corresponding to a first type of time domain resource, and the second threshold is related to a second maximum number of times, which is the maximum number of transmissions of a random access preamble corresponding to a second type of time domain resource; or, a random access problem is reported based on the first random access preamble transmission counter, the second random access preamble transmission counter and a third threshold, the third threshold is related to the maximum number of transmissions of a random access preamble corresponding to the first type of time domain resource and the second time domain resource class; wherein, the random access problem is used to indicate that there is an abnormality in the random access process of the terminal device.

[0228] Failure judgment method 1: The first type of time domain resources and the second type of time domain resources respectively correspond to the maximum number of transmission times of a random access preamble code.

[0229] When the value of the first random access preamble transmission counter is greater than or equal to the first threshold, the random access problem is reported; or when the value of the second random access preamble transmission counter is greater than or equal to the second threshold, the random access problem is reported.

[0230] In some embodiments, the first threshold is the first maximum number of times, and the second threshold is the second maximum number of times; or, the first threshold is the sum of the first maximum number of times and the first initial value, and the second threshold is the sum of the second maximum number of times and the second initial value.

[0231] Exemplarily, the first type of time domain resources are SBFD symbols, and the second type of time domain resources are non-SBFD symbols; the first maximum number is recorded as preambleTransMax_SBFD, and the second maximum number is recorded as preambleTransMax_nonSBFD. The first type of time domain resources corresponds to the first random access preamble transmission counter (PREAMBLE_TRANSMISSION_COUNTER_SBFD), and the second type of time domain resources corresponds to the second random access preamble transmission counter (PREAMBLE_TRANSMISSION_COUNTER_nonSBFD); the first threshold is the sum of the first maximum number and the first initial value, and the second threshold is the sum of the second maximum number and the second initial value; the first initial value is the initial value of the first random access preamble transmission counter, which is 1; the second initial value is the initial value of the second random access preamble transmission counter, which is also 1. At this time, if PREAMBLE_TRANSMISSION_COUNTER_SBFD=preambleTransMax_SBFD+1, or PREAMBLE_TRANSMISSION_COUNTER_nonSBFD=preambleTransMax_nonSBFD+1, a random access problem is reported.

[0232] To sum up, the method provided in the embodiment of the present application records the number of times the terminal device attempts the random access process by setting a preamble code transmission counter, so that when there are first type time domain resources and second type time domain resources, the terminal device can judge whether it is necessary to continue the random access process.

[0233] Failure judgment method 2: The first type of time domain resources and the second type of time domain resources correspond to only a maximum number of transmission times of a random access preamble code.

[0234] When the number of transmissions is greater than or equal to the third threshold, a random access problem is reported, and the number of transmissions is the sum of the value of the first random access preamble transmission counter and the value of the second random access preamble transmission counter.

[0235] In some embodiments, the third threshold is the maximum number of transmissions of the random access preamble; or, the third threshold is the sum of the maximum number of transmissions of the random access preamble, the first initial value, and the second initial value.

[0236] Exemplarily, the first type of time domain resources are SBFD symbols, and the second type of time domain resources are non-SBFD symbols; the maximum number of transmissions of the random access preamble is recorded as preambleTransMax. The first type of time domain resources corresponds to the first random access preamble transmission counter (PREAMBLE_TRANSMISSION_COUNTER_SBFD), and the second type of time domain resources corresponds to the second random access preamble transmission counter (PREAMBLE_TRANSMISSION_COUNTER_nonSBFD); the third threshold is the sum of the maximum number of transmissions of the random access preamble, the first initial value, and the second initial value; the first initial value is the initial value of the first random access preamble transmission counter, which is 1; the second initial value is the initial value of the second random access preamble transmission counter, which is also 1. At this time, if PREAMBLE_TRANSMISSION_COUNTER_SBFD+PREAMBLE_TRANSMISSION_COUNTER_nonSBFD=preambleTransMax+2, a random access problem is reported.

[0237] To sum up, the method provided in the embodiment of the present application records the number of times the terminal device attempts the random access process by setting a preamble code transmission counter, so that when there are first type time domain resources and second type time domain resources, the terminal device can judge whether it is necessary to continue the random access process.

[0238] FIG17 shows a flow chart of a random access channel transmission method provided by an exemplary embodiment of the present application. The method is executed by a network device and includes:

[0239] Step 330: Receive a random access channel, where the random access channel is sent by the terminal device according to relevant parameters of the random access channel when transmitted in the first type of time domain resources and / or relevant parameters of the random access channel when transmitted in the second type of time domain resources.

[0240] In some embodiments, the time domain resource includes at least one of the following: a symbol, a symbol group, a time slot, a sub-time slot, a frame, and a sub-frame. In the embodiments of the present application, the specific type of the time domain resource is not limited.

[0241] In some embodiments, the first type of time domain resources and the second type of time domain resources can be understood as two different duplex modes, time slots, or symbols. The number, position, size, and frequency domain bandwidth of the available uplink resources in the first type of time domain resources and the second type of time domain resources are different; or the number, position, size, and frequency domain bandwidth of the random access channels in the first type of time domain resources and the second type of time domain resources are different. For example, the first type of time domain resources are SBFD symbols, and the second type of time domain resources are non-SBFD symbols. SBFD symbols are symbols that include at least one of an uplink subband, a downlink subband, and a guard band, while non-SBFD symbols are symbols that do not include the above subbands.

[0242] In some embodiments, the relevant parameters include at least one of the following: transmit power; target power level; value of a power ramp counter; value of a random access preamble transmission counter; maximum number of transmissions of a random access preamble; power ramp step of a random access channel; a first parameter, the first parameter is used to indicate the number of frequency-division multiplexed random access channel transmission opportunities in a time unit, such as a time unit is a time instance; a second parameter, the second parameter is used to indicate an offset value between the lowest random access channel transmission opportunity in the frequency domain and a reference point, the reference point being PRB0 of the uplink BWP. Among them, the transmit power is used to indicate how much energy the terminal device will use to send the random access channel; the target power level is used to indicate the target power of the random access channel expected by the receiver of the network device; the value of the power climb counter is used to indicate the number of power climbs. Generally speaking, after each random access failure, the value of the power climb counter will be increased by 1; the random access preamble transmission counter is used to indicate the number of preamble transmissions during the random access process, that is, the number of random access channel transmissions; the maximum number of random access preamble transmissions is used to indicate the maximum number of preamble transmissions during the entire random access process, that is, the maximum number of random access channel transmissions; the power climb step size of the random access channel is used to indicate the amount of power increase during each power climb.

[0243] For example, as shown in Figure 6, the slashed square 10 represents a random access channel transmission opportunity, and the first parameter is 2, which is used to indicate that the number of random access channel transmission opportunities for frequency division multiplexing in one time unit is 2; if the reference point is PRB0 of the active UL BWP (activated uplink BWP), that is, the starting PRB of the active UL BWP, then the offset value between the lowest random access channel transmission opportunity and PRB0 in the frequency domain dimension in Figure 6 is the second parameter.

[0244] In some embodiments, the relevant parameters of the random access channel during transmission include power-related parameters and / or frequency domain-related parameters.

[0245] In some embodiments, the power-related parameters include transmit power and a power ramp counter.

[0246] Among them, the specific calculation process of the transmission power is the transmission power calculation process of the terminal device, which will not be repeated here.

[0247] In some embodiments, the target power level includes a first target power level and a second target power level, the first type of time domain resources corresponds to the first target power level, and the second type of time domain resources corresponds to the second target power level; a random access channel is received, the random access channel transmission opportunity corresponds to the first type of time domain resources, and the first transmit power of the random access channel is determined by the terminal device based on the first target power level; and / or, a random access channel is received, the random access channel transmission opportunity corresponds to the second type of time domain resources, and the second transmit power of the random access channel is determined by the terminal device based on the second target power level.

[0248] In some embodiments, the first transmit power is determined by the terminal device based on at least one of a first target power level, a power climb step, a power climb counter, and a preamble code increment; the second transmit power is determined by the terminal device based on at least one of a second target power level, a power climb step, a power climb counter, and a preamble code increment; wherein the preamble code increment is determined based on at least one of a random access preamble code format and a subcarrier spacing.

[0249] In some embodiments, the first type of time domain resources corresponds to at least one of a first power climb counter, a first random access preamble transmission counter, and a first power climb step; the second type of time domain resources corresponds to at least one of a second power climb counter, a second random access preamble transmission counter, and a second power climb step.

[0250] In some embodiments, a random access channel is received, the random access channel transmission opportunity corresponds to a first type of time domain resource, and the first transmit power of the random access channel is determined by the terminal device based on at least one of the first target power level and the value of the first power climb counter; and / or, a random access channel is received, the random access channel transmission opportunity corresponds to a second type of time domain resource, and the second transmit power of the random access channel is determined by the terminal device based on at least one of the second target power level and the value of the second power climb counter. For example, the first type of time domain resource corresponds to the first power climb counter, the second type of time domain resource corresponds to the second power climb counter, but the first type of time domain resource and the second type of time domain resource share the same target power level; for another example, the first type of time domain resource corresponds to the first target power level, the second type of time domain resource corresponds to the second target power level, but the first type of time domain resource and the second type of time domain resource share the same power climb counter. For another example, the first type of time domain resource corresponds to the first target power level and the first power climb counter, and the second type of time domain resource corresponds to the second target power level and the second power climb counter.

[0251] In some embodiments, the first transmit power is determined by the terminal device based on at least one of a first target power level, a first power climb step, a first power climb counter and a preamble code increment; the second transmit power is determined by the terminal device based on at least one of a second target power level, a second power climb step, a second power climb counter and a preamble code increment; wherein the preamble code increment is determined based on at least one of a random access preamble code format and a subcarrier spacing.

[0252] Next, different ways of increasing the power increase counter in the terminal device are shown.

[0253] In some embodiments, for random access channel transmission, if the corresponding time domain resource type changes compared to the previous transmission, the terminal device keeps the power ramp counter unchanged.

[0254] In some embodiments, for random access channel transmission, if the corresponding time domain resource type changes compared to the previous transmission, the terminal device resets or initializes the power ramp counter.

[0255] In some embodiments, when the random access process is started, the terminal device initializes at least one of the first power climb counter, the first random access preamble transmission counter, the second power climb counter, and the second random access preamble transmission counter; when the random access channel transmission fails and the random access channel corresponds to the first type of time domain resources, the first random access preamble transmission counter in the terminal device is increased by 1; when the random access channel transmission fails and the random access channel corresponds to the second type of time domain resources, the second random access preamble transmission counter in the terminal device is increased by 1; when the random access channel corresponds to the first type of time domain resources and the value of the first random access preamble transmission counter is greater than the first initial value, the first power climb counter in the terminal device is increased by 1; when the random access channel corresponds to the second type of time domain resources and the value of the second random access preamble transmission counter is greater than the second initial value, the second power climb counter in the terminal device is increased by 1. Random access channel transmission failure indicates that if the RAR window times out but no random access response containing the first random access preamble identifier is received or contention resolution is unsuccessful, the random access channel transmission is considered to have failed. The first random access preamble identifier matches the PRACH preamble index sent by the terminal.

[0256] In some embodiments, the initial transmission and retransmission of the random access channel correspond to the same time domain resource type; or, the terminal device does not expect the retransmission of the random access channel to change the corresponding time domain resource type relative to the initial transmission or relative to the previous transmission; or, the terminal device does not expect the time domain resource type corresponding to the retransmission of the random access channel to be different from the time domain resource type corresponding to the initial transmission of the random access channel or the previous transmission of the random access channel.

[0257] In some embodiments, a random access problem reported by a terminal device is received, and the random access problem is reported based on a first random access preamble transmission counter and a first threshold, or a second random access preamble transmission counter and a second threshold, the first threshold is related to a first maximum number of times, and the first maximum number of times is the maximum number of transmissions of the random access preamble corresponding to the first type of time domain resources, and the second threshold is related to the second maximum number of times, and the second maximum number of times is the maximum number of transmissions of the random access preamble corresponding to the second type of time domain resources; or, a random access problem reported by a terminal device is received, and the random access problem is reported based on the first random access preamble transmission counter, the second random access preamble transmission counter and a third threshold, and the third threshold is related to the maximum number of transmissions of the random access preamble corresponding to the first type of time domain resources and the second time domain resource class; wherein the random access problem is used to indicate that there is an abnormality in the random access process of the terminal device.

[0258] In some embodiments, a random access channel transmission opportunity is valid under the following circumstances: the random access channel transmission opportunity is within an uplink symbol; or the random access channel transmission opportunity is within a first type of time domain resource and the random access channel transmission opportunity is located within a first frequency domain bandwidth, for example, the random access channel transmission opportunity is within the first type of time domain resource and the random access channel transmission opportunity is located within the intersection of an uplink subband and an uplink BWP. The first type of time domain resource is an SBFD symbol; the random access channel transmission opportunity being within an uplink symbol means that the symbols where the random access channel transmission opportunity is located are all uplink symbols; the random access channel transmission opportunity being within the first type of time domain resource means that the symbols where the random access channel transmission opportunity is located are all SBFD symbols; that is, if a random access channel transmission opportunity is located in a symbol that includes both an uplink symbol and an SBFD symbol, then the random access channel transmission opportunity is invalid.

[0259] In some embodiments, the first frequency domain bandwidth is a subset of the available uplink bandwidth configured by the network device for the terminal device; the first frequency domain bandwidth is the actual available uplink bandwidth determined in the uplink BWP of the terminal device based on the first duplex mode or the first type of time domain resources. The first duplex mode or the first type of time domain resources may be SBFD.

[0260] In some embodiments, the uplink BWP is an uplink BWP activated for uplink transmissions by the terminal device. The first frequency-domain bandwidth is the entire bandwidth or a portion of the uplink BWP. Due to differences in available uplink subbands in different duplex modes or different time-domain resource types, the first frequency-domain bandwidth may dynamically change even for the same terminal device.

[0261] In some embodiments, the first frequency domain bandwidth may be understood as an available subband in an uplink BWP, an available uplink subband, an actually available subband, or an actually available uplink subband.

[0262] To sum up, in the method provided in the embodiment of the present application, the network device receives a random access channel, and the random access channel is sent by the terminal device based on the relevant parameters of the random access channel when it is transmitted in the first type of time domain resources and / or the relevant parameters when it is transmitted in the second type of time domain resources. That is, the random access channel received by the network device is determined by the terminal device based on different relevant parameters corresponding to different time domain resource types.

[0263] In an optional embodiment, the first frequency domain bandwidth is a portion of available subbands within the uplink BWP. The first frequency domain bandwidth is the actual available uplink bandwidth of the terminal device. A detailed description of the first frequency domain bandwidth is provided in "1. First Frequency Domain Bandwidth" above and is not repeated here.

[0264] In some embodiments, the network device provides differentiated configurations for the terminal device for the first type of time domain resources and / or the second type of time domain resources. There are two configuration methods, which are described below.

[0265] 4.1 Configuration method 1.

[0266] In an optional embodiment based on FIG. 17 , the method further includes:

[0267] Step 310: Send a first configuration and a second configuration, where the first configuration and the second configuration are used to configure relevant parameters during random access channel transmission. The first configuration corresponds to a first type of time domain resource, and the second configuration corresponds to a second type of time domain resource.

[0268] In some embodiments, the time domain resources include at least one of the following: a symbol, a symbol group, a time slot, a sub-time slot, a frame, and a subframe. In the embodiments of the present application, the specific type of time domain resources is not limited. For example, the first configuration corresponds to a first type of symbol, and the second configuration corresponds to a second type of symbol. For example, the first configuration corresponds to an SBFD symbol, and the second configuration corresponds to a non-SBFD symbol. An SBFD symbol is a symbol that includes at least one of an uplink subband, a downlink subband, and a guard band, while a non-SBFD symbol is a symbol that does not include any of the above subbands.

[0269] In some embodiments, the configuration of the random access channel includes at least one of a power configuration and a frequency domain configuration. The power configuration is used to configure power-related parameters during random access channel transmission, and the frequency domain configuration is used to configure frequency-related parameters during random access channel transmission. The first configuration includes at least one of a first power configuration and a first frequency domain configuration; the second configuration includes at least one of a second power configuration and a second frequency domain configuration. The configuration items included in the first configuration and the second configuration are the same, that is, when the first configuration includes the first power configuration, the second configuration should also include the second power configuration; when the first configuration includes the first frequency domain configuration, the second configuration should also include the second frequency domain configuration; when the first configuration includes the first power configuration and the first frequency domain configuration, the second configuration should also include the second power configuration and the second frequency domain configuration.

[0270] In some embodiments, the power configuration includes at least one of the following related parameters: target power level; maximum number of transmissions of the random access preamble code; power ramp step size of the random access channel; that is, either the first configuration or the second configuration includes at least one of the following related parameters: target power level; maximum number of transmissions of the random access preamble code; power ramp step size of the random access channel.

[0271] In some embodiments, the power-related parameters include at least one of the following parameters: transmit power; target power level; value of the power ramp counter; value of the random access preamble transmission counter; maximum number of transmissions of the random access preamble; and power ramp step size of the random access channel.

[0272] In some embodiments, the first configuration and the second configuration only include parameters with different values, wherein the parameters with the same values ​​in the first configuration and the second configuration can be additionally configured by the network device or agreed upon by the communication protocol; for example, the first configuration includes a first target power level, the second configuration includes a second target power level, the maximum number of transmissions of the random access preamble code and the power climbing step of the random access channel are additionally configured by the network device or agreed upon by the communication protocol; or, the first configuration includes the first target power level and the first power climbing step, the second configuration includes the second target power level and the second power climbing step, the maximum number of transmissions of the random access preamble code is additionally configured by the network device or agreed upon by the communication protocol; or, the first configuration includes the first target power level and the first maximum number, the second configuration includes the second target power level and the second maximum number, and the power climbing step of the random access channel is additionally configured by the network device or agreed upon by the communication protocol; or, the first configuration includes the first target power level, the first maximum number and the first power climbing step, and the second configuration includes the second target power level, the second maximum number and the second power climbing step.

[0273] In some embodiments, the first configuration and the second configuration include all parameters. That is, the first configuration includes a first target power level, a first maximum number of times, and a first power ramp step size, while the second configuration includes a second target power level, a second maximum number of times, and a second power ramp step size. The first maximum number of times and the second maximum number of times may be the same or different, and the first power ramp step size and the second power ramp step size may be the same or different.

[0274] In some embodiments, the frequency domain configuration includes at least one of the following related parameters: a first parameter, the first parameter is used to indicate the number of random access channel transmission opportunities for frequency division multiplexing in one time unit; a second parameter, the second parameter is used to indicate the offset value between the lowest random access channel transmission opportunity in the frequency domain and the reference point, and the reference point is PRB0 of the uplink BWP; that is, either the first configuration or the second configuration includes at least one of the following related parameters: a first parameter, the first parameter is used to indicate the number of random access channel transmission opportunities for frequency division multiplexing in one time unit; a second parameter, the second parameter is used to indicate the offset value between the lowest random access channel transmission opportunity in the frequency domain and the reference point, and the reference point is PRB0 of the uplink BWP.

[0275] In some embodiments, the first configuration and the second configuration share some related parameters. Exemplarily, as shown in Figure 14, the terminal device uses a set of power climb counters and preamble transmission counters for the first configuration and the second configuration. At this time, the shared related parameters corresponding to the first configuration and the second configuration are the power climb counter and the preamble transmission counter. The first configuration includes at least one of the following: a first target power level, a first maximum number of times, a first power climb step, a first parameter 1, and a second parameter 1. The second configuration includes at least one of the following: a second target power level, a second maximum number of times, a second power climb step, a first parameter 2, and a second parameter 2. Among them, the first target power level and the second target power level are usually different. The first maximum number and the second maximum number may be the same or different, the first power climb step and the second power climb step may be the same or different, the first parameter 1 and the first parameter 2 may be the same or different, and the second parameter 1 and the second parameter 2 may be the same or different.

[0276] In some embodiments, the first configuration and the second configuration do not share relevant parameters. For example, as shown in FIG15 , the terminal device uses a set of power ramp counters and preamble transmission counters for the first configuration and the second configuration, respectively. The first configuration includes at least one of the following: a first target power level, a first maximum number of times, a first power ramp step size, a first power ramp counter, a first preamble transmission counter, a first parameter 1, and a second parameter 1. The second configuration includes at least one of the following: a second target power level, a second maximum number of times, a second power ramp step size, a second power ramp counter, a second preamble transmission counter, a first parameter 2, and a second parameter 2. The first target power level and the second target power level are typically different. The first maximum number and the second maximum number of times can be the same or different, the first power ramp step size and the second power ramp step size can be the same or different, the first power ramp counter and the second power ramp counter are typically different, the first preamble transmission counter and the second preamble transmission counter are typically different, the first parameter 1 and the first parameter 2 can be the same or different, and the second parameter 1 and the second parameter 2 can be the same or different.

[0277] In some embodiments, a first configuration parameter and a second configuration parameter are sent, the first configuration parameter corresponds to the first configuration, and the second configuration parameter corresponds to the second configuration; or, the first configuration parameter and an offset value are sent, the first configuration parameter corresponds to the first configuration, and the configuration parameter after the first configuration parameter is offset based on the offset value corresponds to the second configuration; or, the second configuration parameter and an offset value are sent, the second configuration parameter corresponds to the second configuration, and the configuration parameter after the second configuration value parameter is offset based on the offset value corresponds to the first configuration; or, the first configuration parameter is sent, the first configuration parameter corresponds to the first configuration; or, the second configuration parameter is sent, and the second configuration parameter corresponds to the second configuration. Exemplarily, the first configuration parameter includes a first target power level, and the second configuration parameter includes a second target power level; or, the first configuration includes a first target power level, and the offset value includes a target power level offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset; or, the first configuration includes a first target power level and a first power climbing step, and the offset value includes a target power level offset and a power climbing step offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset, and the second power climbing step corresponding to the second configuration is the sum of the first target power climbing step and the power climbing step offset.

[0278] In some embodiments, a part of the related parameters are configured by a first configuration parameter and a second configuration parameter; another part of the related parameters are configured by a first configuration parameter and an offset value; or, the first part of the related parameters are configured by a first configuration parameter and a second configuration parameter, the second part of the related parameters are configured by a first configuration parameter and an offset value, and the third part of the related parameters are based on additional configuration of the network device or protocol agreement. For example, the related parameters include a target power level, a maximum number of transmissions of a random access preamble, and a power ramp step of a random access channel; for the target power level, the first configuration parameter (i.e., the first target power level) and the second configuration parameter (i.e., the second target power level) are used for configuration; or, based on additional configuration of the network device or protocol agreement; or, the first configuration parameter (i.e., the first target power level) and the offset value (i.e., the target power level offset) are used for configuration; for the maximum number of transmissions of a random access preamble, the first configuration parameter (i.e., the first maximum number) and the second configuration parameter (i.e., the second target power level) are used for configuration. Configuration is performed using the first configuration parameter (i.e., the second maximum number of times); or, based on additional configuration of the network device or protocol agreement; or, using the first configuration parameter (i.e., the first maximum number of times) and the offset value (i.e., the maximum number offset) for configuration; for the power ramp step of the random access channel, the first configuration parameter (i.e., the first power ramp step) and the second configuration parameter (i.e., the second power ramp step) are configured; or, based on additional configuration of the network device or protocol agreement; or, using the first configuration parameter (i.e., the first power ramp step) and the offset value (i.e., the power ramp step offset) for configuration.

[0279] Exemplarily, the first configuration parameter includes a first target power level, and the second configuration parameter includes a second target power level; or, the first configuration includes a first target power level, and the offset value includes a target power level offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset; or, the first configuration includes a first target power level and a first power climbing step, and the offset value includes a target power level offset and a power climbing step offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset, and the second power climbing step corresponding to the second configuration is the sum of the first target power climbing step and the power climbing step offset.

[0280] For example, if the second configuration parameter is the second target power level, denoted as preambleReceivedTargetPower, and the offset value is the target power level offset, denoted as delta_SBFD, then the first target power level corresponding to the first configuration is preambleReceivedTargetPower + delta_SBFD. The calculation formulas for the first and second transmit powers are as follows.

[0281] First transmit power=preambleReceivedTargetPower+delta_SBFD+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP.

[0282] Second transmit power=preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP.

[0283] In an optional embodiment, the power configuration of the random access channel can also be implemented as follows: if the time domain resource type used in the current transmission is different from the time domain resource type used in the previous transmission, the power ramp counter is incremented by 1; an offset count is set, recorded as counter_SBFD, and when the time domain resource type used in the initial transmission is the first type of time domain resource, the offset count is initialized to 1; when the time domain resource type used in the initial transmission is the second type of time domain resource, the offset count is initialized to 0; when the time domain resource type used in the retransmission is the first type of time domain resource, the offset count is incremented by 1, that is, counter_SBFD + 1. In this case, the calculation formulas for the first transmit power and the second transmit power are as follows.

[0284] First transmit power=preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP+counter_SBFD×delta_SBFD.

[0285] Second transmit power=preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP.

[0286] To sum up, in the method provided in the embodiment of the present application, the network device performs random access by sending the first configuration and the second configuration of the random access channel to the terminal device. Since the first configuration corresponds to the first type of time domain resources and the second configuration corresponds to the second type of time domain resources; this enables the terminal device to select different configurations for different time domain resource types during the random access process.

[0287] 4.2 Configuration method 2.

[0288] In an optional embodiment based on FIG. 17 , the method further includes:

[0289] Step 320: Send a third configuration, where the third configuration is used to configure relevant parameters during random access channel transmission. The third configuration corresponds to the first type of time domain resources and the second type of time domain resources.

[0290] In some embodiments, when configuring frequency domain related parameters of the random access channel, a set of configurations, ie, a third configuration, may be used in common for the first type of time domain resources and the second type of time domain resources.

[0291] In some embodiments, the third configuration includes a second parameter; the second parameter is used to indicate an offset value between a lowest random access channel transmission opportunity in the frequency domain and a reference point. For the first type of time domain resources, the reference point is the lowest PRB of the first frequency domain bandwidth in the frequency domain; and for the second type of time domain resources, the reference point is PRB0 of the uplink BWP.

[0292] In some embodiments, the third configuration further includes a first parameter, where the first parameter is used to indicate the number of frequency division multiplexing random access channel transmission opportunities in a time unit, for example, a time unit is a time instance.

[0293] Exemplarily, as shown in FIG16 , the third configuration includes a first parameter and a second parameter, the first parameter can be recorded as msg1-FDM, and the second parameter can be recorded as msg1-FrequencyStart. In FIG16 , based on the parameters msg1-FDM=2 and msg1-FrequencyStart=0 configured in the third configuration, a group of random access channel transmission opportunities 28 of the first type of time domain resources and a group of random access channel transmission opportunities 29 of the second type of time domain resources are selected, wherein the group of random access channel transmission opportunities 28 includes 4 random access channel transmission opportunities, and the group of random access channel transmission opportunities 29 includes 4 random access channel transmission opportunities. The reference point for the first type of time domain resources is recorded as reference point 30, and the reference point for the second type of time domain resources is recorded as reference point 31. Reference point 30 is the lowest PRB of the intersection of the uplink subband and the uplink BWP in the frequency domain dimension, and reference point 31 is PRB0 of the uplink BWP.

[0294] In summary, the method provided in the embodiments of the present application enables the network device to set only one configuration for the first type of time domain resources and the second type of time domain resources, thereby saving signaling overhead. The terminal device only needs to maintain one configuration and interpret the first type of time domain resources and the second type of time domain resources differently, while still ensuring that all random access channel transmission opportunities are valid and that the random access channel transmission opportunities are at both ends of the uplink BWP or uplink subband, thus avoiding resource fragmentation.

[0295] In some embodiments, the random access channel transmission method shown in step 310 and the random access channel transmission method shown in step 320 can be implemented in combination. That is, a portion of the relevant parameters can be configured by configuration method one, and another portion of the parameters can be configured by configuration method two; or, a first portion of the relevant parameters can be configured by configuration method one, a second portion of the parameters can be configured by configuration method two, and a third portion of the parameters can be based on additional configuration of the network device or protocol agreement. For example, for the frequency domain configuration of the random access channel, the first type of time domain resources corresponds to the first configuration, the second type of time domain resources corresponds to the second configuration, the first configuration and the second configuration include a first parameter, and the value of the first parameter corresponding to the first configuration is the same as or different from the value of the first parameter corresponding to the second configuration; the first type of time domain resources and the second type of time domain resources correspond to a third configuration, the third configuration includes a second parameter, and the third configuration has different interpretation methods for the first type of time domain resources and the second type of time domain resources. That is, the terminal device configures the number of random access channel transmission opportunities corresponding to the first type of time domain resources and the number of random access channel transmission opportunities corresponding to the second type of time domain resources according to the method shown in step 310, and configures the positions of the random access channel transmission opportunities corresponding to the first type of time domain resources and the second type of time domain resources according to the method shown in step 320. Steps 310 and 320 may be implemented as independent embodiments or as a combined embodiment. When steps 310 and 320 are implemented as a combined embodiment, steps 310 and 320 may be swapped in order or performed simultaneously.

[0296] FIG18 shows a flow chart of a random access channel transmission method provided by an exemplary embodiment of the present application. The method is executed by the above-mentioned terminal device, and the method includes:

[0297] Step 410: Receive at least one of the first configuration, the second configuration and the third configuration, where the first configuration, the second configuration and the third configuration are used to configure relevant parameters during random access channel transmission, the first configuration corresponds to the first type of time domain resources, the second configuration corresponds to the second type of time domain resources, and the third configuration corresponds to the first type of time domain resources and the second type of time domain resources.

[0298] In some embodiments, the time domain resource includes at least one of the following: a symbol, a symbol group, a time slot, a sub-time slot, a frame, and a sub-frame. In the embodiments of the present application, the specific type of the time domain resource is not limited.

[0299] In some embodiments, the first type of time domain resources and the second type of time domain resources can be understood as two different duplex modes, time slots, or symbols. The number, position, size, and frequency domain bandwidth of the available uplink resources in the first type of time domain resources and the second type of time domain resources are different; or the number, position, size, and frequency domain bandwidth of the random access channels in the first type of time domain resources and the second type of time domain resources are different. For example, the first type of time domain resources are SBFD symbols, and the second type of time domain resources are non-SBFD symbols. SBFD symbols are symbols that include at least one of an uplink subband, a downlink subband, and a guard band, while non-SBFD symbols are symbols that do not include the above subbands.

[0300] In some embodiments, the terminal device receives the first configuration and the second configuration; or, the terminal device receives the third configuration; or, the terminal device receives the first configuration, the second configuration, and the third configuration.

[0301] Among them, the first configuration, second configuration and third configuration received by the terminal device can be found in the above "3.1 Configuration method 1" and "3.2 Configuration method 2", which will not be repeated here.

[0302] In summary, in the method provided in the embodiment of the present application, the terminal device receives at least one of the first configuration, the second configuration, and the third configuration before transmitting the random access channel, wherein the first configuration, the second configuration, and the third configuration are used to configure the relevant parameters for the transmission of the random access channel, the first configuration corresponds to the first type of time domain resources, the second configuration corresponds to the second type of time domain resources, and the third configuration corresponds to the first type of time domain resources and the second type of time domain resources. The first configuration and the second configuration correspond to the case of separate configuration, and the third configuration corresponds to the case of common configuration. Whether they are configured separately or together, the terminal device can select different configurations for different time domain resource types during the random access process.

[0303] FIG19 shows a flow chart of a random access channel transmission method provided by an exemplary embodiment of the present application. The method is executed by the above-mentioned terminal device, and the method includes:

[0304] Step 510: Transmitting a random access channel on a valid random access channel transmission opportunity;

[0305] Among them, a random access channel transmission opportunity is valid in the following cases: the random access channel transmission opportunity is within an uplink symbol; or the random access channel transmission opportunity is within the first type of time domain resources, and the random access channel transmission opportunity is located within the first frequency domain bandwidth.

[0306] For example, if a random access channel transmission opportunity is within the first type of time domain resources and is located at the intersection of the uplink subband and the uplink BWP, the first type of time domain resources are SBFD symbols. A random access channel transmission opportunity within an uplink symbol indicates that all symbols containing the random access channel transmission opportunity are uplink symbols. A random access channel transmission opportunity within the first type of time domain resources indicates that all symbols containing the random access channel transmission opportunity are SBFD symbols. In other words, if a random access channel transmission opportunity is located within a symbol that includes both uplink symbols and SBFD symbols, then the random access channel transmission opportunity is invalid.

[0307] In some embodiments, the first frequency domain bandwidth is a subset of the available uplink bandwidth configured by the network device for the terminal device; the first frequency domain bandwidth is the actual available uplink bandwidth determined in the uplink BWP of the terminal device based on the first duplex mode or the first type of time domain resources. The first duplex mode or the first type of time domain resources may be SBFD.

[0308] In some embodiments, the uplink BWP is an uplink BWP activated for uplink transmissions by the terminal device. The first frequency-domain bandwidth is the entire bandwidth or a portion of the uplink BWP. Due to differences in available uplink subbands in different duplex modes or different time-domain resource types, the first frequency-domain bandwidth may dynamically change even for the same terminal device.

[0309] In some embodiments, the first frequency domain bandwidth may be understood as an available subband in an uplink BWP, an available uplink subband, an actually available subband, or an actually available uplink subband.

[0310] In some embodiments, the first frequency domain bandwidth is a portion of available subbands within the uplink BWP. The first frequency domain bandwidth is the actual available uplink bandwidth of the terminal device. A detailed description of the first frequency domain bandwidth is provided in "1. First Frequency Domain Bandwidth" above and is omitted here.

[0311] In summary, the method provided in the embodiment of the present application shows that the transmission condition of the random access channel is to be transmitted on a valid random access channel transmission opportunity, and gives the transmission condition of a valid random access channel transmission opportunity, so that the terminal device can successfully transmit when transmitting on the random access channel.

[0312] FIG20 shows a block diagram of a random access channel transmission apparatus provided by an exemplary embodiment of the present application. The apparatus may be implemented as a terminal device, or as a part of a terminal device, through software or hardware, or a combination of both. The apparatus includes:

[0313] The first sending module 610 is configured to send a random access channel according to relevant parameters of the random access channel when transmitted in the first type of time domain resources and / or relevant parameters of the random access channel when transmitted in the second type of time domain resources.

[0314] In some embodiments, the time domain resource includes at least one of the following: a symbol, a symbol group, a time slot, a sub-time slot, a frame, and a sub-frame. In the embodiments of the present application, the specific type of the time domain resource is not limited.

[0315] In some embodiments, the first type of time domain resources and the second type of time domain resources can be understood as two different duplex modes, time slots, or symbols. The number, position, size, and frequency domain bandwidth of the available uplink resources in the first type of time domain resources and the second type of time domain resources are different; or the number, position, size, and frequency domain bandwidth of the random access channels in the first type of time domain resources and the second type of time domain resources are different. For example, the first type of time domain resources are SBFD symbols, and the second type of time domain resources are non-SBFD symbols. SBFD symbols are symbols that include at least one of an uplink subband, a downlink subband, and a guard band, while non-SBFD symbols are symbols that do not include the above subbands.

[0316] In some embodiments, the relevant parameters include at least one of the following: transmit power; target power level; value of the power climb counter; value of the random access preamble transmission counter; maximum number of transmissions of the random access preamble; power climb step of the random access channel; a first parameter, the first parameter is used to indicate the number of random access channel transmission opportunities of frequency division multiplexing in one time unit; a second parameter, the second parameter is used to indicate the offset value between the lowest random access channel transmission opportunity in the frequency domain and the reference point, the reference point is PRB0 of the uplink BWP, that is, the starting PRB of the uplink BWP. Among them, the transmit power is used to indicate how much energy the terminal device will use to send the random access channel; the target power level is used to indicate the target power of the random access channel expected by the receiver of the network device; the value of the power climb counter is used to indicate the number of power climbs. Generally speaking, after each random access failure, the value of the power climb counter will be increased by 1; the random access preamble transmission counter is used to indicate the number of preamble transmissions during the random access process, that is, the number of random access channel transmissions; the maximum number of random access preamble transmissions is used to indicate the maximum number of preamble transmissions during the entire random access process, that is, the maximum number of random access channel transmissions; the power climb step size of the random access channel is used to indicate the amount of power increase during each power climb.

[0317] For example, as shown in Figure 6, the slashed square 10 represents a random access channel transmission opportunity, and the first parameter is 2, which is used to indicate that the number of random access channel transmission opportunities for frequency division multiplexing in a time instance is 2; if the reference point is PRB0 of the active UL BWP (activated uplink BWP), that is, the starting PRB of the active UL BWP, then the offset value between the lowest random access channel transmission opportunity and PRB0 in the frequency domain dimension in Figure 6 is the second parameter.

[0318] In some embodiments, the relevant parameters of the random access channel during transmission include power-related parameters and / or frequency domain-related parameters.

[0319] In some embodiments, a random access channel transmission opportunity is valid under the following circumstances: the random access channel transmission opportunity is within an uplink symbol; or the random access channel transmission opportunity is within a first type of time domain resource and the random access channel transmission opportunity is within a first frequency domain bandwidth, for example, the random access channel transmission opportunity is within an SBFD symbol and the random access channel transmission opportunity is within the intersection of an uplink subband and an uplink BWP. The first type of time domain resource is an SBFD symbol; the random access channel transmission opportunity is within an uplink symbol, which means that the symbols where the random access channel transmission opportunity is located are all uplink symbols; the random access channel transmission opportunity is within the first type of time domain resource, which means that the symbols where the random access channel transmission opportunity is located are all SBFD symbols; that is, if a random access channel transmission opportunity is located in a symbol that includes both an uplink symbol and an SBFD symbol, then the random access channel transmission opportunity is invalid.

[0320] In some embodiments, the first frequency domain bandwidth is a subset of the available uplink bandwidth configured by the network device for the terminal device; the first frequency domain bandwidth is the actual available uplink bandwidth determined in the uplink BWP of the terminal device based on the first duplex mode or the first type of time domain resources. The first duplex mode or the first type of time domain resources may be SBFD.

[0321] In some embodiments, the uplink BWP is an uplink BWP activated for uplink transmissions by the terminal device. The first frequency-domain bandwidth is the entire bandwidth or a portion of the uplink BWP. Due to differences in available uplink subbands in different duplex modes or different time-domain resource types, the first frequency-domain bandwidth may dynamically change even for the same terminal device.

[0322] In some embodiments, the first frequency domain bandwidth may be understood as an available subband in an uplink BWP, an available uplink subband, an actually available subband, or an actually available uplink subband.

[0323] To sum up, in the apparatus provided in the embodiment of the present application, the terminal device sends a random access channel according to the relevant parameters of the random access channel when transmitted in the first type of time domain resources and / or the relevant parameters when transmitted in the second type of time domain resources, that is, the terminal device can determine the relevant parameters for transmission under each time domain resource type for different time domain resource types, and send the random access channel according to the relevant parameters.

[0324] In an optional embodiment, the first frequency domain bandwidth is a portion of available subbands within the uplink BWP. The first frequency domain bandwidth is the actual available uplink bandwidth of the terminal device. A detailed description of the first frequency domain bandwidth is provided in "1. First Frequency Domain Bandwidth" above and is not repeated here.

[0325] In some embodiments, the relevant parameters of the random access channel during transmission include power-related parameters and / or frequency-domain-related parameters. For detailed descriptions of power-related parameters and frequency-domain-related parameters, please refer to "2.1 Power-Related Parameters" and "2.2 Frequency-Related Parameters" in the above method side, and will not be repeated here.

[0326] In some embodiments, the network device provides differentiated configurations for the terminal device for the first type of time domain resources and / or the second type of time domain resources. There are two configuration methods, which are described below.

[0327] 3.1 Configuration method 1

[0328] In an optional embodiment based on FIG. 20 , the apparatus further comprises:

[0329] The first receiving module is used to receive a first configuration and a second configuration, where the first configuration and the second configuration are used to configure relevant parameters during random access channel transmission, the first configuration corresponds to a first type of time domain resource, and the second configuration corresponds to a second type of time domain resource.

[0330] In some embodiments, the time domain resources include at least one of the following: a symbol, a symbol group, a time slot, a sub-time slot, a frame, and a subframe. In the embodiments of the present application, the specific type of time domain resources is not limited. For example, the first configuration corresponds to a first type of symbol, and the second configuration corresponds to a second type of symbol. For example, the first configuration corresponds to an SBFD symbol, and the second configuration corresponds to a non-SBFD symbol. An SBFD symbol is a symbol that includes at least one of an uplink subband, a downlink subband, and a guard band, while a non-SBFD symbol is a symbol that does not include any of the above subbands.

[0331] In some embodiments, the configuration of the random access channel includes at least one of a power configuration and a frequency domain configuration. The power configuration is used to configure power-related parameters during random access channel transmission, and the frequency domain configuration is used to configure frequency-related parameters during random access channel transmission. The first configuration includes at least one of a first power configuration and a first frequency domain configuration; the second configuration includes at least one of a second power configuration and a second frequency domain configuration. The configuration items included in the first configuration and the second configuration are the same, that is, when the first configuration includes the first power configuration, the second configuration should also include the second power configuration; when the first configuration includes the first frequency domain configuration, the second configuration should also include the second frequency domain configuration; when the first configuration includes the first power configuration and the first frequency domain configuration, the second configuration should also include the second power configuration and the second frequency domain configuration.

[0332] In some embodiments, the power configuration includes at least one of the following related parameters: target power level; maximum number of transmissions of the random access preamble code; power ramp step size of the random access channel; that is, either the first configuration or the second configuration includes at least one of the following related parameters: target power level; maximum number of transmissions of the random access preamble code; power ramp step size of the random access channel.

[0333] In some embodiments, the power-related parameters include at least one of the following parameters: transmit power; target power level; value of the power ramp counter; value of the random access preamble transmission counter; maximum number of transmissions of the random access preamble; power ramp step of the random access channel. The first part of the related parameters is based on additional configuration of the network device or protocol agreement, and the second part of the parameters is selected, calculated or determined by the terminal device based on the first part of the parameters. Exemplarily, the power-related parameters are configured through configuration method 1, and any one of the first configuration and the second configuration includes at least one of the following parameters: target power level, maximum number of transmissions of the random access preamble, and power ramp step of the random access channel.

[0334] In some embodiments, the first configuration includes a first target power level and the second configuration includes a second target power level.

[0335] In some embodiments, the first configuration further includes a first power ramp step length, and the second configuration further includes a second power ramp step length, wherein the first power ramp step length is the same as or different from the second power ramp step length.

[0336] In some embodiments, the first configuration further includes a first maximum number of times, which is the maximum number of times a random access preamble is transmitted corresponding to the first type of time domain resources; the second configuration further includes a second maximum number of times, which is the maximum number of times a random access preamble is transmitted corresponding to the second type of time domain resources. The first maximum number of times is the same as or different from the second maximum number of times.

[0337] In some embodiments, the first configuration and the second configuration only include parameters with different values, wherein the parameters with the same values ​​in the first configuration and the second configuration can be additionally configured by the network device or agreed upon by the communication protocol; for example, the first configuration includes a first target power level, the second configuration includes a second target power level, the maximum number of transmissions of the random access preamble code and the power climbing step of the random access channel are additionally configured by the network device or agreed upon by the communication protocol; or, the first configuration includes the first target power level and the first power climbing step, the second configuration includes the second target power level and the second power climbing step, the maximum number of transmissions of the random access preamble code is additionally configured by the network device or agreed upon by the communication protocol; or, the first configuration includes the first target power level and the first maximum number, the second configuration includes the second target power level and the second maximum number, and the power climbing step of the random access channel is additionally configured by the network device or agreed upon by the communication protocol; or, the first configuration includes the first target power level, the first maximum number and the first power climbing step, and the second configuration includes the second target power level, the second maximum number and the second power climbing step.

[0338] In some embodiments, the first configuration and the second configuration include all parameters. That is, the first configuration includes a first target power level, a first maximum number of times, and a first power ramp step size, while the second configuration includes a second target power level, a second maximum number of times, and a second power ramp step size. The first maximum number of times and the second maximum number of times may be the same or different, and the first power ramp step size and the second power ramp step size may be the same or different.

[0339] In some embodiments, the frequency domain configuration includes at least one of the following related parameters: a first parameter, the first parameter is used to indicate the number of random access channel transmission opportunities for frequency division multiplexing in one time unit; a second parameter, the second parameter is used to indicate the offset value between the lowest random access channel transmission opportunity in the frequency domain dimension and the reference point, and the reference point is PRB0 of the uplink BWP, that is, the starting PRB of the uplink BWP; that is, either the first configuration or the second configuration includes at least one of the following related parameters: a first parameter, the first parameter is used to indicate the number of random access channel transmission opportunities for frequency division multiplexing in one time unit; a second parameter, the second parameter is used to indicate the offset value between the lowest random access channel transmission opportunity in the frequency domain and the reference point, and the reference point is PRB0 of the uplink BWP.

[0340] In some embodiments, the first configuration and the second configuration share some related parameters. Exemplarily, as shown in Figure 14, the terminal device uses a set of power climb counters and preamble transmission counters for the first configuration and the second configuration. At this time, the shared related parameters corresponding to the first configuration and the second configuration are the power climb counter and the preamble transmission counter. The first configuration includes at least one of the following: a first target power level, a first maximum number of times, a first power climb step, a first parameter 1, and a second parameter 1. The second configuration includes at least one of the following: a second target power level, a second maximum number of times, a second power climb step, a first parameter 2, and a second parameter 2. Among them, the first target power level and the second target power level are usually different. The first maximum number and the second maximum number may be the same or different, the first power climb step and the second power climb step may be the same or different, the first parameter 1 and the first parameter 2 may be the same or different, and the second parameter 1 and the second parameter 2 may be the same or different.

[0341] In some embodiments, the first configuration and the second configuration do not share relevant parameters. For example, as shown in FIG15 , the terminal device uses a set of power ramp counters and preamble transmission counters for the first configuration and the second configuration, respectively. The first configuration includes at least one of the following: a first target power level, a first maximum number of times, a first power ramp step size, a first power ramp counter, a first preamble transmission counter, a first parameter 1, and a second parameter 1. The second configuration includes at least one of the following: a second target power level, a second maximum number of times, a second power ramp step size, a second power ramp counter, a second preamble transmission counter, a first parameter 2, and a second parameter 2. The first target power level and the second target power level are typically different. The first maximum number and the second maximum number of times can be the same or different, the first power ramp step size and the second power ramp step size can be the same or different, the first power ramp counter and the second power ramp counter are typically different, the first preamble transmission counter and the second preamble transmission counter are typically different, the first parameter 1 and the first parameter 2 can be the same or different, and the second parameter 1 and the second parameter 2 can be the same or different.

[0342] In some embodiments, the first receiving module is used to receive a first configuration parameter and a second configuration parameter, the first configuration parameter corresponds to the first configuration, and the second configuration parameter corresponds to the second configuration; or, receive the first configuration parameter and an offset value, the first configuration parameter corresponds to the first configuration, and the configuration parameter after the first configuration parameter is offset based on the offset value corresponds to the second configuration; or, receive the second configuration parameter and an offset value, the second configuration parameter corresponds to the second configuration, and the configuration parameter after the second configuration value parameter is offset based on the offset value corresponds to the first configuration; or, receive the first configuration parameter, the first configuration parameter corresponds to the first configuration; or, receive the second configuration parameter, the second configuration parameter corresponds to the second configuration. Exemplarily, the first configuration parameter includes a first target power level, and the second configuration parameter includes a second target power level; or, the first configuration includes a first target power level, and the offset value includes a target power level offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset; or, the first configuration includes a first target power level and a first power climbing step, and the offset value includes a target power level offset and a power climbing step offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset, and the second power climbing step corresponding to the second configuration is the sum of the first target power climbing step and the power climbing step offset.

[0343] In some embodiments, a part of the related parameters are configured by a first configuration parameter and a second configuration parameter; another part of the related parameters are configured by a first configuration parameter and an offset value; or, the first part of the related parameters are configured by a first configuration parameter and a second configuration parameter, the second part of the related parameters are configured by a first configuration parameter and an offset value, and the third part of the related parameters are based on additional configuration of the network device or protocol agreement. For example, the related parameters include a target power level, a maximum number of transmissions of a random access preamble, and a power ramp step of a random access channel; for the target power level, the first configuration parameter (i.e., the first target power level) and the second configuration parameter (i.e., the second target power level) are used for configuration; or, based on additional configuration of the network device or protocol agreement; or, the first configuration parameter (i.e., the first target power level) and the offset value (i.e., the target power level offset) are used for configuration; for the maximum number of transmissions of a random access preamble, the first configuration parameter (i.e., the first maximum number) and the second configuration parameter (i.e., the second target power level) are used for configuration. Configuration is performed using the first configuration parameter (i.e., the second maximum number of times); or, based on additional configuration of the network device or protocol agreement; or, using the first configuration parameter (i.e., the first maximum number of times) and the offset value (i.e., the maximum number offset) for configuration; for the power ramp step of the random access channel, the first configuration parameter (i.e., the first power ramp step) and the second configuration parameter (i.e., the second power ramp step) are configured; or, based on additional configuration of the network device or protocol agreement; or, using the first configuration parameter (i.e., the first power ramp step) and the offset value (i.e., the power ramp step offset) for configuration.

[0344] Exemplarily, the first configuration parameter includes a first target power level, and the second configuration parameter includes a second target power level; or, the first configuration includes a first target power level, and the offset value includes a target power level offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset; or, the first configuration includes a first target power level and a first power climbing step, and the offset value includes a target power level offset and a power climbing step offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset, and the second power climbing step corresponding to the second configuration is the sum of the first target power climbing step and the power climbing step offset.

[0345] For example, if the second configuration parameter is the second target power level, denoted as preambleReceivedTargetPower, and the offset value is the target power level offset, denoted as delta_SBFD, then the first target power level corresponding to the first configuration is preambleReceivedTargetPower + delta_SBFD. The calculation formulas for the first and second transmit powers are as follows.

[0346] First transmit power=preambleReceivedTargetPower+delta_SBFD+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP.

[0347] Second transmit power=preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP.

[0348] In an optional embodiment, the power configuration of the random access channel can also be implemented as follows: if the time domain resource type used in the current transmission is different from the time domain resource type used in the previous transmission, the power ramp counter is incremented by 1; an offset count is set, recorded as counter_SBFD, and when the time domain resource type used in the initial transmission is the first type of time domain resource, the offset count is initialized to 1; when the time domain resource type used in the initial transmission is the second type of time domain resource, the offset count is initialized to 0; when the time domain resource type used in the retransmission is the first type of time domain resource, the offset count is incremented by 1, that is, counter_SBFD + 1. In this case, the calculation formulas for the first transmit power and the second transmit power are as follows.

[0349] First transmit power=preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP+counter_SBFD×delta_SBFD.

[0350] Second transmit power=preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP.

[0351] To sum up, the device provided in the embodiment of the present application provides the terminal device with a first configuration and a second configuration of the random access channel, so that the terminal device can use the first configuration or the second configuration for random access. Since the first configuration corresponds to the first type of time domain resources and the second configuration corresponds to the second type of time domain resources; this enables the terminal device to select different configurations for different time domain resource types during the random access process.

[0352] 3.2 Configuration method 2.

[0353] In an optional embodiment based on Figure 20, the first receiving module is also used to receive a third configuration, which is used to configure relevant parameters during random access channel transmission. The third configuration corresponds to the first type of time domain resources and the second type of time domain resources.

[0354] In some embodiments, when configuring frequency domain related parameters of the random access channel, a set of configurations, ie, a third configuration, may be used in common for the first type of time domain resources and the second type of time domain resources.

[0355] In some embodiments, the third configuration includes a second parameter; the second parameter is used to indicate an offset value between a lowest random access channel transmission opportunity in the frequency domain and a reference point. For the first type of time domain resources, the reference point is the lowest PRB of the intersection of the uplink subband and the uplink BWP in the frequency domain; and for the second type of time domain resources, the reference point is PRB0 of the uplink BWP.

[0356] In some embodiments, the third configuration further includes a first parameter, where the first parameter is used to indicate the number of frequency division multiplexing random access channel transmission opportunities in a time unit, for example, a time unit is a time instance.

[0357] Exemplarily, as shown in FIG16 , the third configuration includes a first parameter and a second parameter, the first parameter can be recorded as msg1-FDM, and the second parameter can be recorded as msg1-FrequencyStart. In FIG16 , based on the parameters msg1-FDM=2 and msg1-FrequencyStart=0 configured in the third configuration, a group of random access channel transmission opportunities 28 of the first type of time domain resources and a group of random access channel transmission opportunities 29 of the second type of time domain resources are selected, wherein the group of random access channel transmission opportunities 28 includes 4 random access channel transmission opportunities, and the group of random access channel transmission opportunities 29 includes 4 random access channel transmission opportunities. The reference point for the first type of time domain resources is recorded as reference point 30, and the reference point for the second type of time domain resources is recorded as reference point 31. Reference point 30 is the lowest PRB of the intersection of the uplink subband and the uplink BWP in the frequency domain dimension, and reference point 31 is PRB0 of the uplink BWP.

[0358] In summary, the method provided in the embodiments of the present application shares a set of configurations for first-type time-domain resources and second-type time-domain resources, thereby reducing signaling overhead. The terminal device only needs to maintain one set of configurations and interpret the first-type time-domain resources and second-type time-domain resources differently, ensuring that all random access channel transmission opportunities are valid and that the random access channel transmission opportunities are at both ends of the uplink BWP or uplink subband, thus avoiding resource fragmentation.

[0359] In some embodiments, the first receiving module in the above-mentioned configuration method 1 and configuration method 2 can be implemented as the same device or as different devices. That is, a part of the relevant parameters can be configured by configuration method 1, and another part of the parameters can be configured by configuration method 2; or, the first part of the relevant parameters can be configured by configuration method 1, the second part of the parameters can be configured by configuration method 2, and the third part of the parameters can be based on additional configuration of the network device or protocol agreement. For example, configuration method 1 is used for power configuration, and configuration method 2 is used for frequency domain configuration; or, for the frequency domain configuration of the random access channel, the first type of time domain resource corresponds to the first configuration, the second type of time domain resource corresponds to the second configuration, the first configuration and the second configuration include the first parameter, and the value of the first parameter corresponding to the first configuration is the same as or different from the value of the first parameter corresponding to the second configuration; the first type of time domain resource and the second type of time domain resource correspond to the third configuration, the third configuration includes the second parameter, and the third configuration has different interpretation methods for the first type of time domain resource and the second type of time domain resource. That is, the terminal device determines the number of random access channel transmission opportunities corresponding to the first type of time domain resources and the number of random access channel transmission opportunities corresponding to the second type of time domain resources according to configuration method one, and determines the positions of the random access channel transmission opportunities corresponding to the first type of time domain resources and the second type of time domain resources according to configuration method two.

[0360] In some embodiments, a corresponding random access failure judgment method is designed for the situation where the terminal device uses a random access preamble code transmission counter for the first type of time domain resources and the second type of time domain resources respectively.

[0361] In an optional embodiment, the device further includes: a problem reporting module. The problem reporting module is configured to report a random access problem based on a first random access preamble transmission counter and a first threshold, or a second random access preamble transmission counter and a second threshold, wherein the first threshold is related to a first maximum number of times, which is the maximum number of transmissions of a random access preamble corresponding to a first type of time domain resource, and the second threshold is related to a second maximum number of times, which is the maximum number of transmissions of a random access preamble corresponding to a second type of time domain resource; or, report a random access problem based on the first random access preamble transmission counter, the second random access preamble transmission counter, and a third threshold, wherein the third threshold is related to the maximum number of transmissions of a random access preamble corresponding to the first type of time domain resource and the second type of time domain resource; wherein the random access problem is used to indicate that there is an abnormality in the random access process of the terminal device.

[0362] For the specific process of the random access failure judgment method, please refer to "Failure Judgment Method 1" and "Failure Judgment Method 2" on the above method side, which will not be repeated here.

[0363] FIG21 shows a block diagram of a random access channel transmission device provided by an exemplary embodiment of the present application. The device can be implemented as a network device or as a part of a network device through software or hardware or a combination of both. The device includes:

[0364] The second receiving module 710 is used to receive a random access channel, which is sent by the terminal device according to relevant parameters of the random access channel when transmitted in the first type of time domain resources and / or relevant parameters when transmitted in the second type of time domain resources.

[0365] In some embodiments, the time domain resource includes at least one of the following: a symbol, a symbol group, a time slot, a sub-time slot, a frame, and a sub-frame. In the embodiments of the present application, the specific type of the time domain resource is not limited.

[0366] In some embodiments, the first type of time domain resources and the second type of time domain resources can be understood as two different duplex modes, time slots, or symbols. The number, position, size, and frequency domain bandwidth of the available uplink resources in the first type of time domain resources and the second type of time domain resources are different; or the number, position, size, and frequency domain bandwidth of the random access channels in the first type of time domain resources and the second type of time domain resources are different. For example, the first type of time domain resources are SBFD symbols, and the second type of time domain resources are non-SBFD symbols. SBFD symbols are symbols that include at least one of an uplink subband, a downlink subband, and a guard band, while non-SBFD symbols are symbols that do not include the above subbands.

[0367] In some embodiments, the relevant parameters include at least one of the following: transmit power; target power level; value of the power ramp counter; value of the random access preamble transmission counter; maximum number of transmissions of the random access preamble; power ramp step of the random access channel; a first parameter, the first parameter is used to indicate the number of random access channel transmission opportunities of frequency division multiplexing in a time unit, for example, a time unit is a time instance; a second parameter, the second parameter is used to indicate the offset value between the lowest random access channel transmission opportunity in the frequency domain dimension and the reference point, the reference point is PRB0 of the uplink BWP. Among them, the transmit power is used to indicate how much energy the terminal device will use to send the random access channel; the target power level is used to indicate the target power of the random access channel expected by the receiver of the network device; the value of the power climb counter is used to indicate the number of power climbs. Generally speaking, after each random access failure, the value of the power climb counter will be increased by 1; the random access preamble transmission counter is used to indicate the number of preamble transmissions during the random access process, that is, the number of random access channel transmissions; the maximum number of random access preamble transmissions is used to indicate the maximum number of preamble transmissions during the entire random access process, that is, the maximum number of random access channel transmissions; the power climb step size of the random access channel is used to indicate the amount of power increase during each power climb.

[0368] For example, as shown in Figure 6, the slashed square 10 represents a random access channel transmission opportunity, and the first parameter is 2, which is used to indicate that the number of random access channel transmission opportunities for frequency division multiplexing in one time unit is 2; if the reference point is PRB0 of the active UL BWP (activated uplink BWP), that is, the starting PRB of the active UL BWP, then the offset value between the lowest random access channel transmission opportunity and PRB0 in the frequency domain dimension in Figure 6 is the second parameter.

[0369] In some embodiments, the relevant parameters of the random access channel during transmission include power-related parameters and / or frequency domain-related parameters.

[0370] In some embodiments, the power-related parameters include transmit power and a power ramp counter.

[0371] Among them, the specific calculation process of the transmission power is the transmission power calculation process of the terminal device, which will not be repeated here.

[0372] In some embodiments, the target power level includes a first target power level and a second target power level, the first type of time domain resources corresponds to the first target power level, and the second type of time domain resources corresponds to the second target power level.

[0373] In some embodiments, the second receiving module 710 is used to receive a random access channel, where the random access channel transmission opportunity corresponds to a first type of time domain resource, and the first transmission power of the random access channel is determined by the terminal device based on the first target power level; and / or, to receive a random access channel, where the random access channel transmission opportunity corresponds to a second type of time domain resource, and the second transmission power of the random access channel is determined by the terminal device based on the second target power level.

[0374] In some embodiments, the first transmit power is determined by the terminal device based on at least one of a first target power level, a power climb step, a power climb counter, and a preamble code increment; the second transmit power is determined by the terminal device based on at least one of a second target power level, a power climb step, a power climb counter, and a preamble code increment; wherein the preamble code increment is determined based on at least one of a random access preamble code format and a subcarrier spacing.

[0375] In some embodiments, the first type of time domain resources corresponds to at least one of a first power climb counter, a first random access preamble transmission counter, and a first power climb step; the second type of time domain resources corresponds to at least one of a second power climb counter, a second random access preamble transmission counter, and a second power climb step.

[0376] In some embodiments, the second receiving module 710 is used to receive a random access channel, where the random access channel transmission opportunity corresponds to a first type of time domain resource, and the first transmit power of the random access channel is determined by the terminal device based on at least one of the first target power level and the first power escalation counter; and / or, receive a random access channel, where the random access channel transmission opportunity corresponds to a second type of time domain resource, and the second transmit power of the random access channel is determined by the terminal device based on at least one of the second target power level and the second power escalation counter. For example, the first type of time domain resource corresponds to the first power escalation counter, and the second type of time domain resource corresponds to the second power escalation counter, but the first type of time domain resource and the second type of time domain resource share the same target power level; for another example, the first type of time domain resource corresponds to the first target power level, and the second type of time domain resource corresponds to the second target power level, but the first type of time domain resource and the second type of time domain resource share the same power escalation counter. For another example, the first type of time domain resource corresponds to the first target power level and the first power escalation counter, and the second type of time domain resource corresponds to the second target power level and the second power escalation counter.

[0377] In some embodiments, the first transmit power is determined by the terminal device based on at least one of a first target power level, a first power climb step, a first power climb counter and a preamble code increment; the second transmit power is determined by the terminal device based on at least one of a second target power level, a second power climb step, a second power climb counter and a preamble code increment; wherein the preamble code increment is determined based on at least one of a random access preamble code format and a subcarrier spacing.

[0378] Next, different ways of increasing the power increase counter in the terminal device are shown.

[0379] In some embodiments, for random access channel transmission, if the corresponding time domain resource type changes compared to the previous transmission, the terminal device keeps the power ramp counter unchanged.

[0380] In some embodiments, for random access channel transmission, if the corresponding time domain resource type changes compared to the previous transmission, the terminal device resets or initializes the power ramp counter.

[0381] In some embodiments, when a random access procedure is initiated, the terminal device initializes at least one of a first power ramp counter, a first random access preamble transmission counter, a second power ramp counter, and a second random access preamble transmission counter; if random access channel transmission fails and the random access channel corresponds to a first type of time domain resource, the first random access preamble transmission counter in the terminal device is incremented by 1; if random access channel transmission fails and the random access channel corresponds to a second type of time domain resource, the second random access preamble transmission counter in the terminal device is incremented by 1; if the random access channel corresponds to the first type of time domain resource and the first random access preamble transmission counter is greater than a first initial value, the first power ramp counter in the terminal device is incremented by 1; if the random access channel corresponds to the second type of time domain resource and the second random access preamble transmission counter is greater than a second initial value, the second power ramp counter in the terminal device is incremented by 1. Random access channel transmission failure indicates that if the RAR window times out but no random access response including the first random access preamble identifier is received or contention resolution is unsuccessful, the random access channel transmission is considered to have failed. The first random access preamble identifier matches a random access channel preamble index (PRACH preamble index) sent by the terminal.

[0382] In some embodiments, the initial transmission and retransmission of the random access channel correspond to the same time domain resource type; or, the terminal device does not expect the retransmission of the random access channel to change the corresponding time domain resource type relative to the initial transmission or relative to the previous transmission; or, the terminal device does not expect the time domain resource type corresponding to the retransmission of the random access channel to be different from the time domain resource type corresponding to the initial transmission of the random access channel or the previous transmission of the random access channel.

[0383] In some embodiments, the apparatus further includes a problem receiving module. The problem receiving module is configured to receive a random access problem reported by a terminal device, where the random access problem is reported based on a first random access preamble transmission counter and a first threshold, or a second random access preamble transmission counter and a second threshold, where the first threshold is related to a first maximum number of times, which is the maximum number of transmissions of a random access preamble corresponding to a first type of time domain resource, and the second threshold is related to a second maximum number of times, which is the maximum number of transmissions of a random access preamble corresponding to a second type of time domain resource; or, receive a random access problem reported by a terminal device, where the random access problem is reported based on the first random access preamble transmission counter, the second random access preamble transmission counter, and a third threshold, where the third threshold is related to the maximum number of transmissions of a random access preamble corresponding to the first type of time domain resource and the second type of time domain resource; wherein the random access problem is used to indicate that there is an abnormality in the random access process of the terminal device.

[0384] In some embodiments, a random access channel transmission opportunity is valid under the following circumstances: the random access channel transmission opportunity is within an uplink symbol; or the random access channel transmission opportunity is within a first type of time domain resource and the random access channel transmission opportunity is within a first frequency domain bandwidth, for example, the random access channel transmission opportunity is within an SBFD symbol and the random access channel transmission opportunity is within the intersection of an uplink subband and an uplink BWP. The first type of time domain resource is an SBFD symbol; the random access channel transmission opportunity is within an uplink symbol, which means that the symbols where the random access channel transmission opportunity is located are all uplink symbols; the random access channel transmission opportunity is within the first type of time domain resource, which means that the symbols where the random access channel transmission opportunity is located are all SBFD symbols; that is, if a random access channel transmission opportunity is located in a symbol that includes both an uplink symbol and an SBFD symbol, then the random access channel transmission opportunity is invalid.

[0385] In some embodiments, the first frequency domain bandwidth is a subset of the available uplink bandwidth configured by the network device for the terminal device; the first frequency domain bandwidth is the actual available uplink bandwidth determined in the uplink BWP of the terminal device based on the first duplex mode or the first type of time domain resources. The first duplex mode or the first type of time domain resources may be SBFD.

[0386] In some embodiments, the uplink BWP is an uplink BWP activated for uplink transmissions by the terminal device. The first frequency-domain bandwidth is the entire bandwidth or a portion of the uplink BWP. Due to differences in available uplink subbands in different duplex modes or different time-domain resource types, the first frequency-domain bandwidth may dynamically change even for the same terminal device.

[0387] In some embodiments, the first frequency domain bandwidth may be understood as an available subband in an uplink BWP, an available uplink subband, an actually available subband, or an actually available uplink subband.

[0388] To sum up, in the apparatus provided in the embodiment of the present application, the network device receives a random access channel. The random access channel is sent by the terminal device based on the relevant parameters of the random access channel when it is transmitted in the first type of time domain resources and / or the relevant parameters when it is transmitted in the second type of time domain resources. That is, the random access channel received by the network device is determined by the terminal device based on different relevant parameters corresponding to different time domain resource types.

[0389] In an optional embodiment, the first frequency domain bandwidth is a portion of available subbands within the uplink BWP. The first frequency domain bandwidth is the actual available uplink bandwidth of the terminal device. A detailed description of the first frequency domain bandwidth is provided in "1. First Frequency Domain Bandwidth" above and is not repeated here.

[0390] In some embodiments, the network device provides differentiated configurations for the terminal device for the first type of time domain resources and / or the second type of time domain resources. There are two configuration methods, which are described below.

[0391] 4.1 Configuration method 1.

[0392] In an optional embodiment based on FIG. 21 , the apparatus further includes a second sending module.

[0393] The second sending module is used to send a first configuration and a second configuration, where the first configuration and the second configuration are used to configure relevant parameters during random access channel transmission. The first configuration corresponds to a first type of time domain resource, and the second configuration corresponds to a second type of time domain resource.

[0394] In some embodiments, the time domain resources include at least one of the following: a symbol, a symbol group, a time slot, a sub-time slot, a frame, and a subframe. In the embodiments of the present application, the specific type of time domain resources is not limited. For example, the first configuration corresponds to a first type of symbol, and the second configuration corresponds to a second type of symbol. For example, the first configuration corresponds to an SBFD symbol, and the second configuration corresponds to a non-SBFD symbol. An SBFD symbol is a symbol that includes at least one of an uplink subband, a downlink subband, and a guard band, while a non-SBFD symbol is a symbol that does not include any of the above subbands.

[0395] In some embodiments, the configuration of the random access channel includes at least one of a power configuration and a frequency domain configuration. The power configuration is used to configure power-related parameters during random access channel transmission, and the frequency domain configuration is used to configure frequency-related parameters during random access channel transmission. The first configuration includes at least one of a first power configuration and a first frequency domain configuration; the second configuration includes at least one of a second power configuration and a second frequency domain configuration. The configuration items included in the first configuration and the second configuration are the same, that is, when the first configuration includes the first power configuration, the second configuration should also include the second power configuration; when the first configuration includes the first frequency domain configuration, the second configuration should also include the second frequency domain configuration; when the first configuration includes the first power configuration and the first frequency domain configuration, the second configuration should also include the second power configuration and the second frequency domain configuration.

[0396] In some embodiments, the power configuration includes at least one of the following related parameters: target power level; maximum number of transmissions of the random access preamble code; power ramp step size of the random access channel; that is, either the first configuration or the second configuration includes at least one of the following related parameters: target power level; maximum number of transmissions of the random access preamble code; power ramp step size of the random access channel.

[0397] In some embodiments, the power-related parameters include at least one of the following parameters: transmit power; target power level; value of the power ramp counter; value of the random access preamble transmission counter; maximum number of transmissions of the random access preamble; and power ramp step size of the random access channel.

[0398] In some embodiments, the first configuration and the second configuration only include parameters with different values, wherein the parameters with the same values ​​in the first configuration and the second configuration can be additionally configured by the network device or agreed upon by the communication protocol; for example, the first configuration includes a first target power level, the second configuration includes a second target power level, the maximum number of transmissions of the random access preamble code and the power climbing step of the random access channel are additionally configured by the network device or agreed upon by the communication protocol; or, the first configuration includes the first target power level and the first power climbing step, the second configuration includes the second target power level and the second power climbing step, the maximum number of transmissions of the random access preamble code is additionally configured by the network device or agreed upon by the communication protocol; or, the first configuration includes the first target power level and the first maximum number, the second configuration includes the second target power level and the second maximum number, and the power climbing step of the random access channel is additionally configured by the network device or agreed upon by the communication protocol; or, the first configuration includes the first target power level, the first maximum number and the first power climbing step, and the second configuration includes the second target power level, the second maximum number and the second power climbing step.

[0399] In some embodiments, the first configuration and the second configuration include all parameters. That is, the first configuration includes a first target power level, a first maximum number of times, and a first power ramp step size, while the second configuration includes a second target power level, a second maximum number of times, and a second power ramp step size. The first maximum number of times and the second maximum number of times may be the same or different, and the first power ramp step size and the second power ramp step size may be the same or different.

[0400] In some embodiments, the first configuration and the second configuration share some related parameters. Exemplarily, as shown in Figure 14, the terminal device uses a set of power climb counters and preamble transmission counters for the first configuration and the second configuration. At this time, the shared related parameters corresponding to the first configuration and the second configuration are the power climb counter and the preamble transmission counter. The first configuration includes at least one of the following: a first target power level, a first maximum number of times, a first power climb step, a first parameter 1, and a second parameter 1. The second configuration includes at least one of the following: a second target power level, a second maximum number of times, a second power climb step, a first parameter 2, and a second parameter 2. Among them, the first target power level and the second target power level are usually different. The first maximum number and the second maximum number may be the same or different, the first power climb step and the second power climb step may be the same or different, the first parameter 1 and the first parameter 2 may be the same or different, and the second parameter 1 and the second parameter 2 may be the same or different.

[0401] In some embodiments, the first configuration and the second configuration do not share relevant parameters. For example, as shown in FIG15 , the terminal device uses a set of power ramp counters and preamble transmission counters for the first configuration and the second configuration, respectively. The first configuration includes at least one of the following: a first target power level, a first maximum number of times, a first power ramp step size, a first power ramp counter, a first preamble transmission counter, a first parameter 1, and a second parameter 1. The second configuration includes at least one of the following: a second target power level, a second maximum number of times, a second power ramp step size, a second power ramp counter, a second preamble transmission counter, a first parameter 2, and a second parameter 2. The first target power level and the second target power level are typically different. The first maximum number and the second maximum number of times can be the same or different, the first power ramp step size and the second power ramp step size can be the same or different, the first power ramp counter and the second power ramp counter are typically different, the first preamble transmission counter and the second preamble transmission counter are typically different, the first parameter 1 and the first parameter 2 can be the same or different, and the second parameter 1 and the second parameter 2 can be the same or different.

[0402] In some embodiments, the frequency domain configuration includes at least one of the following related parameters: a first parameter, the first parameter is used to indicate the number of random access channel transmission opportunities for frequency division multiplexing in a time unit, such as a time unit is a time instance; a second parameter, the second parameter is used to indicate the offset value between the lowest random access channel transmission opportunity in the frequency domain dimension and the reference point; that is, any one of the first configuration and the second configuration includes at least one of the following related parameters: a first parameter, the first parameter is used to indicate the number of random access channel transmission opportunities for frequency division multiplexing in a time unit, such as a time unit is a time instance; a second parameter, the second parameter is used to indicate the offset value between the lowest random access channel transmission opportunity in the frequency domain dimension and the reference point.

[0403] In some embodiments, the second sending module is used to send the first configuration parameter and the second configuration parameter, the first configuration parameter corresponds to the first configuration, and the second configuration parameter corresponds to the second configuration; or, send the first configuration parameter and the offset value, the first configuration parameter corresponds to the first configuration, and the configuration parameter after the first configuration parameter is offset based on the offset value corresponds to the second configuration; or, send the second configuration parameter and the offset value, the second configuration parameter corresponds to the second configuration, and the configuration parameter after the second configuration value parameter is offset based on the offset value corresponds to the first configuration; or, send the first configuration parameter, the first configuration parameter corresponds to the first configuration; or, send the second configuration parameter, the second configuration parameter corresponds to the second configuration. Exemplarily, the first configuration parameter includes a first target power level, and the second configuration parameter includes a second target power level; or, the first configuration includes a first target power level, and the offset value includes a target power level offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset; or, the first configuration includes a first target power level and a first power climbing step, and the offset value includes a target power level offset and a power climbing step offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset, and the second power climbing step corresponding to the second configuration is the sum of the first target power climbing step and the power climbing step offset.

[0404] In some embodiments, a part of the related parameters are configured by a first configuration parameter and a second configuration parameter; another part of the related parameters are configured by a first configuration parameter and an offset value; or, the first part of the related parameters are configured by a first configuration parameter and a second configuration parameter, the second part of the related parameters are configured by a first configuration parameter and an offset value, and the third part of the related parameters are based on additional configuration of the network device or protocol agreement. For example, the related parameters include a target power level, a maximum number of transmissions of a random access preamble, and a power ramp step of a random access channel; for the target power level, the first configuration parameter (i.e., the first target power level) and the second configuration parameter (i.e., the second target power level) are used for configuration; or, based on additional configuration of the network device or protocol agreement; or, the first configuration parameter (i.e., the first target power level) and the offset value (i.e., the target power level offset) are used for configuration; for the maximum number of transmissions of a random access preamble, the first configuration parameter (i.e., the first maximum number) and the second configuration parameter (i.e., the second target power level) are used for configuration. Configuration is performed using the first configuration parameter (i.e., the second maximum number of times); or, based on additional configuration of the network device or protocol agreement; or, using the first configuration parameter (i.e., the first maximum number of times) and the offset value (i.e., the maximum number offset) for configuration; for the power ramp step of the random access channel, the first configuration parameter (i.e., the first power ramp step) and the second configuration parameter (i.e., the second power ramp step) are configured; or, based on additional configuration of the network device or protocol agreement; or, using the first configuration parameter (i.e., the first power ramp step) and the offset value (i.e., the power ramp step offset) for configuration.

[0405] Exemplarily, the first configuration parameter includes a first target power level, and the second configuration parameter includes a second target power level; or, the first configuration includes a first target power level, and the offset value includes a target power level offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset; or, the first configuration includes a first target power level and a first power climbing step, and the offset value includes a target power level offset and a power climbing step offset, then the second target power level corresponding to the second configuration is the sum of the first target power level and the target power level offset, and the second power climbing step corresponding to the second configuration is the sum of the first target power climbing step and the power climbing step offset.

[0406] For example, if the second configuration parameter is the second target power level, denoted as preambleReceivedTargetPower, and the offset value is the target power level offset, denoted as delta_SBFD, then the first target power level corresponding to the first configuration is preambleReceivedTargetPower + delta_SBFD. The calculation formulas for the first and second transmit powers are as follows.

[0407] First transmit power=preambleReceivedTargetPower+delta_SBFD+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP.

[0408] Second transmit power=preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP.

[0409] In an optional embodiment, the power configuration of the random access channel can also be implemented as follows: if the time domain resource type used in the current transmission is different from the time domain resource type used in the previous transmission, the power ramp counter is incremented by 1; an offset count is set, recorded as counter_SBFD, and when the time domain resource type used in the initial transmission is the first type of time domain resource, the offset count is initialized to 1; when the time domain resource type used in the initial transmission is the second type of time domain resource, the offset count is initialized to 0; when the time domain resource type used in the retransmission is the first type of time domain resource, the offset count is incremented by 1, that is, counter_SBFD + 1. In this case, the calculation formulas for the first transmit power and the second transmit power are as follows.

[0410] First transmit power=preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP+counter_SBFD×delta_SBFD.

[0411] Second transmit power=preambleReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER−1)×PREAMBLE_POWER_RAMPING_STEP.

[0412] To sum up, in the apparatus provided in the embodiment of the present application, the network device performs random access by sending the first configuration and the second configuration of the random access channel to the terminal device. Since the first configuration corresponds to the first type of time domain resources and the second configuration corresponds to the second type of time domain resources; this enables the terminal device to select different configurations for different time domain resource types during the random access process.

[0413] 4.2 Configuration method 2.

[0414] In an optional embodiment based on Figure 21, the second sending module is also used to send a third configuration, which is used to configure relevant parameters during random access channel transmission. The third configuration corresponds to the first type of time domain resources and the second type of time domain resources.

[0415] In some embodiments, when configuring frequency domain related parameters of the random access channel, a set of configurations, ie, a third configuration, may be used in common for the first type of time domain resources and the second type of time domain resources.

[0416] In some embodiments, the third configuration includes a second parameter; the second parameter is used to indicate an offset value between a lowest random access channel transmission opportunity in the frequency domain and a reference point. For the first type of time domain resources, the reference point is the lowest PRB of the intersection of the uplink subband and the uplink BWP in the frequency domain; and for the second type of time domain resources, the reference point is PRB0 of the uplink BWP.

[0417] In some embodiments, the third configuration further includes a first parameter, where the first parameter is used to indicate the number of frequency division multiplexing random access channel transmission opportunities in a time unit, for example, a time unit is a time instance.

[0418] Exemplarily, as shown in FIG16 , the third configuration includes a first parameter and a second parameter, the first parameter can be recorded as msg1-FDM, and the second parameter can be recorded as msg1-FrequencyStart. In FIG16 , based on the parameters msg1-FDM=2 and msg1-FrequencyStart=0 configured in the third configuration, a group of random access channel transmission opportunities 28 of the first type of time domain resources and a group of random access channel transmission opportunities 29 of the second type of time domain resources are selected, wherein the group of random access channel transmission opportunities 28 includes 4 random access channel transmission opportunities, and the group of random access channel transmission opportunities 29 includes 4 random access channel transmission opportunities. The reference point for the first type of time domain resources is recorded as reference point 30, and the reference point for the second type of time domain resources is recorded as reference point 31. Reference point 30 is the lowest PRB of the intersection of the uplink subband and the uplink BWP in the frequency domain dimension, and reference point 31 is PRB0 of the uplink BWP.

[0419] In summary, in the apparatus provided in the embodiments of the present application, the network device only sets one configuration for the first type of time domain resources and the second type of time domain resources, which can save signaling overhead. The terminal device only needs to maintain one configuration and interpret the first type of time domain resources and the second type of time domain resources differently, while still ensuring that all random access channel transmission opportunities are valid and that the random access channel transmission opportunities are at both ends of the uplink BWP or uplink subband, thus avoiding resource fragmentation.

[0420] In some embodiments, the second sending module in the above-mentioned configuration method 1 and configuration method 2 can be implemented as the same device or as different devices. That is, a part of the relevant parameters can be configured by configuration method 1, and the other part of the parameters can be configured by configuration method 2; or, the first part of the relevant parameters can be configured by configuration method 1, the second part of the parameters can be configured by configuration method 2, and the third part of the parameters can be based on additional configuration of the network device or protocol agreement. For example, for the frequency domain configuration of the random access channel, the first type of time domain resources corresponds to the first configuration, the second type of time domain resources corresponds to the second configuration, the first configuration and the second configuration include the first parameter, and the value of the first parameter corresponding to the first configuration is the same as or different from the value of the first parameter corresponding to the second configuration; the first type of time domain resources and the second type of time domain resources correspond to the third configuration, the third configuration includes the second parameter, and the third configuration has different interpretation methods for the first type of time domain resources and the second type of time domain resources. That is, the terminal device configures the number of random access channel transmission opportunities corresponding to the first type of time domain resources and the number of random access channel transmission opportunities corresponding to the second type of time domain resources according to the instructions of the second sending module in configuration method one, and configures the positions of the random access channel transmission opportunities corresponding to the first type of time domain resources and the second type of time domain resources according to the instructions of the second sending module in configuration method one.

[0421] FIG22 shows a block diagram of a random access channel transmission apparatus provided by an exemplary embodiment of the present application. The apparatus may be implemented as a terminal device, or as a part of a terminal device, through software or hardware, or a combination of both. The apparatus includes:

[0422] The third receiving module 810 is used to receive at least one of the first configuration, the second configuration and the third configuration, where the first configuration, the second configuration and the third configuration are used to configure relevant parameters during random access channel transmission, the first configuration corresponds to the first type of time domain resources, the second configuration corresponds to the second type of time domain resources, and the third configuration corresponds to the first type of time domain resources and the second type of time domain resources.

[0423] In some embodiments, the time domain resource includes at least one of the following: a symbol, a symbol group, a time slot, a sub-time slot, a frame, and a sub-frame. In the embodiments of the present application, the specific type of the time domain resource is not limited.

[0424] In some embodiments, the first type of time domain resources and the second type of time domain resources can be understood as two different duplex modes, time slots, or symbols. The number, position, size, and frequency domain bandwidth of the available uplink resources in the first type of time domain resources and the second type of time domain resources are different; or the number, position, size, and frequency domain bandwidth of the random access channels in the first type of time domain resources and the second type of time domain resources are different. For example, the first type of time domain resources are SBFD symbols, and the second type of time domain resources are non-SBFD symbols. SBFD symbols are symbols that include at least one of an uplink subband, a downlink subband, and a guard band, while non-SBFD symbols are symbols that do not include the above subbands.

[0425] In some embodiments, the terminal device receives the first configuration and the second configuration; or, the terminal device receives the third configuration; or, the terminal device receives the first configuration, the second configuration, and the third configuration.

[0426] Among them, the first configuration, second configuration and third configuration received by the terminal device can be found in the above "3.1 Configuration method 1" and "3.2 Configuration method 2", which will not be repeated here.

[0427] In summary, in the apparatus provided by the embodiments of the present application, the terminal device receives at least one of the first configuration, the second configuration, and the third configuration before transmitting the random access channel, wherein the first configuration, the second configuration, and the third configuration are used to configure relevant parameters for random access channel transmission, the first configuration corresponds to the first type of time domain resources, the second configuration corresponds to the second type of time domain resources, and the third configuration corresponds to the first type of time domain resources and the second type of time domain resources. The first configuration and the second configuration correspond to the case of separate configuration, and the third configuration corresponds to the case of common configuration. Whether they are configured separately or together, the terminal device can select different configurations for different time domain resource types during the random access process.

[0428] FIG23 shows a block diagram of a random access channel transmission apparatus provided by an exemplary embodiment of the present application. The apparatus may be implemented as a terminal device, or as a part of a terminal device, through software or hardware, or a combination of both. The apparatus includes:

[0429] The transmission module 910 is configured to transmit a random access channel on a valid random access channel transmission opportunity;

[0430] Among them, a random access channel transmission opportunity is valid in the following cases: the random access channel transmission opportunity is within an uplink symbol; or the random access channel transmission opportunity is within the first type of time domain resources, and the random access channel transmission opportunity is located within the first frequency domain bandwidth.

[0431] For example, if a random access channel transmission opportunity is within the first type of time domain resources and is located at the intersection of the uplink subband and the uplink BWP, the first type of time domain resources are SBFD symbols. A random access channel transmission opportunity within an uplink symbol indicates that all symbols containing the random access channel transmission opportunity are uplink symbols. A random access channel transmission opportunity within the first type of time domain resources indicates that all symbols containing the random access channel transmission opportunity are SBFD symbols. In other words, if a random access channel transmission opportunity is located within a symbol that includes both uplink symbols and SBFD symbols, then the random access channel transmission opportunity is invalid.

[0432] In some embodiments, the first frequency domain bandwidth is a subset of the available uplink bandwidth configured by the network device for the terminal device; the first frequency domain bandwidth is the actual available uplink bandwidth determined in the uplink BWP of the terminal device based on the first duplex mode or the first type of time domain resources. The first duplex mode or the first type of time domain resources may be SBFD.

[0433] In some embodiments, the uplink BWP is an uplink BWP activated for uplink transmissions by the terminal device. The first frequency-domain bandwidth is the entire bandwidth or a portion of the uplink BWP. Due to differences in available uplink subbands in different duplex modes or different time-domain resource types, the first frequency-domain bandwidth may dynamically change even for the same terminal device.

[0434] In some embodiments, the first frequency domain bandwidth may be understood as an available subband in an uplink BWP, an available uplink subband, an actually available subband, or an actually available uplink subband.

[0435] In some embodiments, the first frequency domain bandwidth is a portion of available subbands within the uplink BWP. The first frequency domain bandwidth is the actual available uplink bandwidth of the terminal device. A detailed description of the first frequency domain bandwidth is provided in "1. First Frequency Domain Bandwidth" above and is omitted here.

[0436] To sum up, the device provided in the embodiment of the present application shows that the transmission condition of the random access channel is transmitted on a valid random access channel transmission opportunity, and gives the transmission condition of a valid random access channel transmission opportunity, so that the terminal device can successfully transmit when transmitting on the random access channel.

[0437] It should be noted that the device provided in the above embodiment is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0438] Regarding the device in this embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method and will not be elaborated here.

[0439] Figure 24 shows a schematic diagram of the structure of a terminal device provided by an exemplary embodiment of the present application. The terminal device 1000 can be used to execute the method steps performed by the terminal device in the above-mentioned embodiment. The terminal device 1000 may include: a processor 1001, a transceiver 1002, and a memory 1003. The processor 1001 can be used to control transmission and / or reception. The transceiver 1002 can be used to implement transmission and / or reception functions, such as implementing the functions of at least one of the first transmission module 610, the first reception module, the problem reporting module, the third reception module 810, and the transmission module 910.

[0440] The processor 1001 includes one or more processing cores. The processor 1001 executes various functional applications and information processing by running software programs and modules.

[0441] The transceiver 1002 may include a receiver and a transmitter. For example, the receiver and the transmitter may be implemented as the same wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0442] The memory 1003 may be connected to the processor 1001 and the transceiver 1002 .

[0443] The memory 1003 may be used to store a computer program executed by the processor, and the processor 1001 is used to execute the computer program to implement each step in the above method embodiment.

[0444] In addition, the memory 1003 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, and the volatile or non-volatile storage device includes but is not limited to: a magnetic disk or optical disk, an electrically erasable programmable read-only memory, an erasable programmable read-only memory, a static access memory, a read-only memory, a magnetic memory, a flash memory, and a programmable read-only memory.

[0445] In some embodiments, the processor 1001 is configured to send a random access channel according to relevant parameters of the random access channel when transmitted in the first type of time domain resources and / or relevant parameters of the random access channel when transmitted in the second type of time domain resources.

[0446] In some embodiments, the processor 1001 is used to receive at least one of a first configuration, a second configuration, and a third configuration, where the first configuration, the second configuration, and the third configuration are used to configure relevant parameters during random access channel transmission, the first configuration corresponds to a first type of time domain resource, the second configuration corresponds to a second type of time domain resource, and the third configuration corresponds to both the first type of time domain resource and the second type of time domain resource.

[0447] In some embodiments, the processor 1001 is configured to transmit a random access channel on a valid random access channel transmission opportunity.

[0448] For details not described in detail in this embodiment, please refer to the above embodiments and will not be described in detail here.

[0449] Figure 25 shows a schematic diagram of the structure of a network device provided by an exemplary embodiment of the present application. Network device 1100 may be used to execute the method steps performed by the network device in the above-described embodiments. Network device 1100 may include a processor 1101, a transceiver 1102, and a memory 1103. Processor 1101 may be used to control transmission and / or reception. Transceiver 1102 may be used to implement transmission and / or reception functions, such as implementing the functions of at least one of the above-described second receiving module 710, the question receiving module, and the second transmitting module.

[0450] The processor 1101 includes one or more processing cores. The processor 1101 executes various functional applications and information processing by running software programs and modules.

[0451] The transceiver 1102 may include a receiver and a transmitter. For example, the transceiver 1102 may include a wired communication component, which may include a wired communication chip and a wired interface (such as an optical fiber interface). Alternatively, the transceiver 1102 may also include a wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0452] The memory 1103 may be connected to the processor 1101 and the transceiver 1102 .

[0453] The memory 1103 may be used to store a computer program executed by the processor, and the processor 1101 is used to execute the computer program to implement each step performed by the network device in the above method embodiment.

[0454] In addition, the memory 1103 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disk or optical disk, electrically erasable programmable read-only memory, erasable programmable read-only memory, static random access memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0455] In some embodiments, the processor 1101 is used to receive a random access channel, which is sent by the terminal device based on relevant parameters of the random access channel when transmitted in the first type of time domain resources and / or relevant parameters when transmitted in the second type of time domain resources.

[0456] For details not described in detail in this embodiment, please refer to the above embodiments and will not be described in detail here.

[0457] The embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored, and the computer program is used to be executed by a processor to implement the above-mentioned random access channel transmission method. In some embodiments, the computer-readable storage medium may include: ROM (Read-Only Memory), RAM (Random-Access Memory), SSD (Solid State Drives) or optical disks, etc. Among them, the random access memory may include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

[0458] An embodiment of the present application further provides a chip, which includes a programmable logic circuit and / or program instructions, and when the chip is running, is used to implement the above-mentioned random access channel transmission method.

[0459] An embodiment of the present application also provides a computer program product, which includes a computer program stored in a computer-readable storage medium. A processor reads and executes the computer program from the computer-readable storage medium to implement the above-mentioned random access channel transmission method.

[0460] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0461] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0462] In this document, "plurality" refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0463] The term “greater than or equal to” mentioned herein may mean greater than or equal to, or greater than, and the term “less than or equal to” may mean less than or equal to, or less than.

[0464] In addition, the step numbers described in this document only illustrate a possible execution order between the steps. In some other embodiments, the above steps may not be executed in the order of the numbers, such as two steps with different numbers are executed at the same time, or two steps with different numbers are executed in the opposite order of the diagram. The embodiments of the present application are not limited to this.

[0465] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0466] The above are merely exemplary embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A random access channel transmission method, characterized in that: The method comprises: The random access channel is sent according to relevant parameters when the random access channel is transmitted in the first type of time domain resources and / or relevant parameters when the random access channel is transmitted in the second type of time domain resources.

2. The method according to claim 1, characterized in that The relevant parameters include at least one of the following: transmit power; target power level; value of a power ramp counter; value of a random access preamble transmission counter; maximum number of random access preamble transmissions; power ramp step size of the random access channel; a first parameter indicating the number of frequency division multiplexing random access channel transmission opportunities in a time unit; A second parameter is used to indicate an offset value between a lowest random access channel transmission opportunity and a reference point in the frequency domain.

3. The method according to claim 2, characterized in that The target power level includes a first target power level and a second target power level, the first type of time domain resources corresponds to the first target power level, and the second type of time domain resources corresponds to the second target power level; The sending of the random access channel according to relevant parameters of the random access channel when transmitted in the first type of time domain resources and / or relevant parameters of the random access channel when transmitted in the second type of time domain resources includes: When the random access channel transmission opportunity corresponds to the first type of time domain resources, the random access channel is sent, and the first transmission power of the random access channel is determined based on the first target power level; and / or, when the random access channel transmission opportunity corresponds to the second type of time domain resources, the random access channel is sent, and the second transmission power of the random access channel is determined based on the second target power level.

4. The method according to claim 3, characterized in that The first transmit power is determined based on at least one of the first target power level, the power ramp step, the value of the power ramp counter, and the preamble code increment; the second transmit power is determined based on at least one of the second target power level, the power ramp step, the value of the power ramp counter, and the preamble code increment; wherein the preamble code increment is determined based on at least one of the random access preamble code format and the subcarrier spacing.

5. The method according to claim 2 or 3, characterized in that The first type of time domain resources corresponds to at least one of a first power climb counter, a first random access preamble transmission counter, and a first power climb step; the second type of time domain resources corresponds to at least one of a second power climb counter, a second random access preamble transmission counter, and a second power climb step.

6. The method according to claim 5, characterized in that The sending the random access channel according to relevant parameters when the random access channel is transmitted in the first type of time domain resources and / or the second type of time domain resources includes: When the random access channel transmission opportunity corresponds to the first type of time domain resources, the random access channel is sent, and the first transmission power of the random access channel is determined based on at least one of the first target power level and the value of the first power climb counter; and / or, when the random access channel transmission opportunity corresponds to the second type of time domain resources, the random access channel is sent, and the second transmission power of the random access channel is determined based on at least one of the second target power level and the value of the second power climb counter.

7. The method according to claim 6, characterized in that The first transmit power is determined based on at least one of the first target power level, the first power climb step, the value of the first power climb counter and the preamble code increment; the second transmit power is determined based on at least one of the second target power level, the second power climb step, the value of the second power climb counter and the preamble code increment; wherein the preamble code increment is determined based on at least one of the random access preamble code format and the subcarrier spacing.

8. The method according to any one of claims 2 to 4, characterized in that The relevant parameters are determined based on the following steps: for random access channel transmission, if the corresponding time domain resource type changes compared to the previous transmission, the power climb counter is kept unchanged; or, if the time domain resource type used for this transmission of the random access channel changes compared to the time domain resource type used for the previous transmission, the power climb counter is kept unchanged.

9. The method according to any one of claims 2 to 4, characterized in that The relevant parameters are determined based on the following steps: For random access channel transmission, if the corresponding time domain resource type changes compared to the previous transmission, reset or initialize the power climb counter; or, if the time domain resource type used for this transmission of the random access channel changes compared to the time domain resource type used for the previous transmission, reset or initialize the power climb counter.

10. The method according to claim 2, 5, 6 or 7, characterized in that: The relevant parameters are determined based on at least one of the following steps: Initializing at least one of the first power ramp counter, the first random access preamble transmission counter, the second power ramp counter, and the second random access preamble transmission counter when the random access process is started; In the case where the random access channel transmission fails and the random access channel corresponds to the first type of time domain resources, the first The random access preamble transmission counter is incremented by 1; In a case where the random access channel transmission fails and the random access channel corresponds to the second type of time domain resources, the second random access preamble transmission counter is incremented by 1; When the random access channel corresponds to the first type of time domain resources and the value of the first random access preamble transmission counter is greater than the first initial value, the first power ramp counter is incremented by 1; When the random access channel corresponds to the second type of time domain resources and the value of the second random access preamble transmission counter is greater than the second initial value, the second power ramp counter is incremented by 1.

11. The method according to any one of claims 2 to 4, characterized in that The relevant parameters are determined based on the following steps: The initial transmission and retransmission of the random access channel correspond to the same time domain resource type; or, the terminal device does not expect the retransmission of the random access channel to change the corresponding time domain resource type relative to the initial transmission or the previous transmission; or, the terminal device does not expect the time domain resource type corresponding to the retransmission of the random access channel to be different from the time domain resource type corresponding to the initial transmission of the random access channel or the previous transmission of the random access channel.

12. The method according to any one of claims 1 to 11, characterized in that: The method further comprises: Receive a first configuration and / or a second configuration, where the first configuration and the second configuration are used to configure relevant parameters during transmission of the random access channel, the first configuration corresponds to the first type of time domain resources, and the second configuration corresponds to the second type of time domain resources.

13. The method according to claim 12, characterized in that Either the first configuration or the second configuration includes at least one of the following related parameters: a target power level; a maximum number of transmissions of a random access preamble; and a power ramp step size of the random access channel.

14. The method according to claim 12 or 13, characterized in that Either of the first configuration and the second configuration includes at least one of the following related parameters: a first parameter, the first parameter is used to indicate the number of random access channel transmission opportunities of frequency division multiplexing in one time unit; a second parameter, the second parameter is used to indicate the offset value between the lowest random access channel transmission opportunity in the frequency domain and the reference point, and the reference point is the starting physical resource block PRB0 of the uplink part bandwidth BWP.

15. The method according to any one of claims 12 to 14, characterized in that: The receiving the first configuration and the second configuration includes: Receive a first configuration parameter and receive a second configuration parameter, the first configuration parameter corresponds to the first configuration, and the second configuration parameter corresponds to the second configuration; or, receive the first configuration parameter and an offset value, the first configuration parameter corresponds to the first configuration, and the configuration parameter after the first configuration parameter is offset based on the offset value corresponds to the second configuration; or, receive the first configuration parameter, the first configuration parameter corresponds to the first configuration; or, receive the second configuration parameter, the second configuration parameter corresponds to the second configuration.

16. The method according to any one of claims 1 to 15, characterized in that The method further comprises: A third configuration is received, where the third configuration is used to configure relevant parameters during transmission of the random access channel, and the third configuration corresponds to the first type of time domain resources and the second type of time domain resources.

17. The method according to claim 16, characterized in that The third configuration includes a second parameter, which is used to indicate the offset value between the lowest random access channel transmission opportunity and the reference point in the frequency domain; wherein, for the first type of time domain resources, the reference point is the lowest physical resource block PRB of the first frequency domain bandwidth in the frequency domain; for the second type of time domain resources, the reference point is PRB0 of the uplink BWP.

18. The method according to claim 5, 6, 7 or 10, characterized in that: The method further comprises: The random access problem is reported based on the first random access preamble transmission counter and the first threshold, or the second random access preamble transmission counter and the second threshold, the first threshold is related to the first maximum number of times, the first maximum number of times the random access preamble corresponding to the first type of time domain resources, the second threshold is related to the second maximum number of times, the second maximum number of times the random access preamble corresponding to the second type of time domain resources; or, the random access problem is reported based on the first random access preamble transmission counter, the second random access preamble transmission counter and the third threshold, the third threshold is related to the maximum number of times the random access preamble corresponding to the first type of time domain resources and the second time domain resource class is transmitted; wherein, the random access problem is used to indicate that there is an abnormality in the random access process of the terminal device.

19. The method according to any one of claims 1 to 18, characterized in that A random access channel transmission opportunity is valid in the following cases: the random access channel transmission opportunity is within an uplink symbol; or the random access channel transmission opportunity is within a first type of time domain resource and the random access channel transmission opportunity is within a first frequency domain bandwidth.

20. The method according to claim 17 or 19, characterized in that The first frequency domain bandwidth includes at least one of the following: an uplink subband; an intersection of the uplink subband and the uplink BWP; a real uplink subband, the real uplink subband being the intersection of the uplink subband and the uplink BWP; A real uplink BWP, where the real uplink BWP is the intersection of the uplink subband and the uplink BWP; an uplink subband portion within the uplink BWP; An available uplink subband portion within the uplink BWP; an uplink subband portion in the uplink BWP within the first type of time domain resources; The available uplink subband portion in the uplink BWP within the first type of time domain resources.

21. A random access channel transmission method, characterized in that: The method comprises: Receive the random access channel, the random access channel is based on the first type of time domain resources and / or the second type of The relevant parameters are sent when transmitting in the time domain resource of this type.

22. The method according to claim 21, characterized in that The relevant parameters include at least one of the following: transmit power; target power level; value of a power ramp counter; value of a random access preamble transmission counter; maximum number of random access preamble transmissions; power ramp step size of the random access channel; a first parameter indicating the number of frequency division multiplexing random access channel transmission opportunities in a time unit; A second parameter is used to indicate an offset value between a lowest random access channel transmission opportunity in the frequency domain and a reference point.

23. The method according to claim 21 or 22, characterized in that The method further comprises: Send a first configuration and / or a second configuration of the random access channel, where the first configuration and the second configuration are used to configure relevant parameters during transmission of the random access channel, the first configuration corresponds to the first type of time domain resources, and the second configuration corresponds to the second type of time domain resources.

24. The method according to claim 23, wherein Either the first configuration or the second configuration includes at least one of the following related parameters: a target power level; a maximum number of transmissions of a random access preamble; and a power ramp step size of the random access channel.

25. The method according to claim 23 or 24, characterized in that Either of the first configuration and the second configuration includes at least one of the following related parameters: a first parameter, the first parameter is used to indicate the number of random access channel transmission opportunities of frequency division multiplexing in one time unit; a second parameter, the second parameter is used to indicate the offset value between the lowest random access channel transmission opportunity in the frequency domain and the reference point, and the reference point is the starting physical resource block PRB0 of the uplink part bandwidth BWP.

26. The method according to any one of claims 23 to 25, characterized in that The receiving the first configuration and the second configuration includes: Send a first configuration parameter and send a second configuration parameter, the first configuration parameter corresponds to the first configuration, and the second configuration parameter corresponds to the second configuration; or, send the first configuration parameter and an offset value, the first configuration parameter corresponds to the first configuration, and the configuration parameter after the first configuration parameter is offset based on the offset value corresponds to the second configuration; or, send the first configuration parameter, the first configuration parameter corresponds to the first configuration; or, send the second configuration parameter, and the second configuration parameter corresponds to the second configuration.

27. The method according to any one of claims 21 to 26, characterized in that The method further comprises: Send a third configuration of the random access channel, where the third configuration is used to configure relevant parameters during transmission of the random access channel, and the third configuration corresponds to the first type of time domain resources and the second type of time domain resources.

28. The method according to claim 27, characterized in that The third configuration includes a second parameter, which is used to indicate an offset value between the lowest random access channel transmission opportunity in the frequency domain and a reference point; wherein, for the first type of time domain resources, the reference point is the lowest physical resource block PRB of the first frequency domain bandwidth in the frequency domain, and for the second type of time domain resources, the reference point is PRB0 of the uplink BWP.

29. The method according to any one of claims 21 to 28, characterized in that The method further comprises: Receive a random access problem reported by the terminal device, where the random access problem is reported based on the first random access preamble transmission counter and a first threshold, or the second random access preamble transmission counter and a second threshold, where the first threshold is related to a first maximum number of times, which is the maximum number of transmissions of the random access preamble corresponding to the first type of time domain resources, and the second threshold is related to a second maximum number of times, which is the maximum number of transmissions of the random access preamble corresponding to the second type of time domain resources; or receive a random access problem reported by the terminal device, where the random access problem is reported based on the first random access preamble transmission counter, the second random access preamble transmission counter and a third threshold, where the third threshold is related to the maximum number of transmissions of the random access preamble corresponding to the first type of time domain resources and the second time domain resource class; wherein the random access problem is used to indicate that there is an abnormality in the random access process of the terminal device.

30. The method according to any one of claims 21 to 29, characterized in that A random access channel transmission opportunity is valid in the following cases: the random access channel transmission opportunity is within an uplink symbol; or the random access channel transmission opportunity is within a first type of time domain resource and the random access channel transmission opportunity is within a first frequency domain bandwidth.

31. The method according to claim 28 or 30, characterized in that The first frequency domain bandwidth includes at least one of the following: an uplink subband; an intersection of the uplink subband and the uplink BWP; a real uplink subband, the real uplink subband being the intersection of the uplink subband and the uplink BWP; A real uplink BWP, where the real uplink BWP is the intersection of the uplink subband and the uplink BWP; an uplink subband portion within the uplink BWP; An available uplink subband portion within the uplink BWP; an uplink subband portion in the uplink BWP within the first type of time domain resources; The available uplink subband portion in the uplink BWP within the first type of time domain resources.

32. A random access channel transmission method, characterized in that: The method is executed by a terminal device, and includes: Receive at least one of a first configuration, a second configuration, and a third configuration, where the first configuration, the second configuration, and the third configuration are used to configure relevant parameters during transmission of the random access channel, the first configuration corresponds to the first type of time domain resources, the second configuration corresponds to the second type of time domain resources, and the third configuration corresponds to the first type of time domain resources and the second type of time domain resources.

33. A random access channel transmission method, characterized in that: The method is executed by a terminal device, and includes: The random access channel is transmitted on a valid random access channel transmission opportunity; wherein a random access channel transmission opportunity is It is effective in the following cases: the random access channel transmission opportunity is within an uplink symbol; or the random access channel transmission opportunity is within a first type of time domain resource, and the random access channel transmission opportunity is within a first frequency domain bandwidth.

34. A transmission device for a random access channel, characterized in that: The device comprises: The first sending module is configured to send the random access channel according to relevant parameters of the random access channel when it is transmitted in the first type of time domain resources and / or relevant parameters of the random access channel when it is transmitted in the second type of time domain resources.

35. A transmission device for a random access channel, characterized in that: The device comprises: The second receiving module is used to receive the random access channel, where the random access channel is sent by the terminal device according to relevant parameters of the random access channel when transmitted in the first type of time domain resources and / or relevant parameters of the random access channel when transmitted in the second type of time domain resources.

36. A transmission device for a random access channel, characterized in that: The device comprises: The third receiving module is used to receive at least one of the first configuration, the second configuration and the third configuration, where the first configuration, the second configuration and the third configuration are used to configure relevant parameters during transmission of the random access channel, the first configuration corresponds to the first type of time domain resources, the second configuration corresponds to the second type of time domain resources, and the third configuration corresponds to the first type of time domain resources and the second type of time domain resources.

37. A transmission device for a random access channel, characterized in that: The device comprises: A transmission module is configured to transmit a random access channel on a valid random access channel transmission opportunity; wherein a random access channel transmission opportunity is valid in the following cases: the random access channel transmission opportunity is within an uplink symbol; or the random access channel transmission opportunity is within a first type of time domain resource and the random access channel transmission opportunity is located within a first frequency domain bandwidth.

38. A terminal device, characterized in that: The terminal device includes: A processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; The processor is configured to load and execute the executable instructions to implement the random access channel transmission method according to any one of claims 1 to 21, or the random access channel transmission method according to claim 32, or the random access channel transmission method according to claim 33.

39. A network device, characterized in that: The network equipment includes: A processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; The processor is configured to load and execute the executable instructions to implement the random access channel transmission method according to any one of claims 21 to 31.

40. A computer-readable storage medium, characterized in that The computer-readable storage medium stores at least one program, and the at least one program is loaded and executed by the processor to implement the random access channel transmission method according to any one of claims 1 to 33.

41. A chip, characterized in that: The chip includes a programmable logic circuit and / or program instructions, and when the chip runs on a terminal device or a network device, it is used to implement the random access channel transmission method described in any one of claims 1 to 33 above.

42. A computer program product, characterized in that The computer program product includes computer instructions, which are stored in a computer-readable storage medium. The processor obtains the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to implement the random access channel transmission method according to any one of claims 1 to 33.

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