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

Abstract

The present application relates to the field of communications. Disclosed are a random access channel transmission method and apparatus, and a device, a medium and a product. The method comprises: on the basis of at least one of a first variable and a second variable, sending a random access channel, wherein the first variable is used for the transmission of the random access channel in a first-type transmission opportunity, and the second variable is used for the transmission of the random access channel in a second-type transmission opportunity. The method provided in the present application can enable a terminal device to determine, for different types of transmission opportunities, variables used during the transmission of a random access channel in the different types of transmission opportunities, thereby achieving differentiated designs for the different types of transmission opportunities.

Description

Transmission method, device, equipment, medium and product of random access channel TECHNICAL FIELD

[0001] The present application relates to the field of communication, in particular to a transmission method, device, equipment, medium and product of a random access channel. BACKGROUND

[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 relevant parameters when transmitting a random access channel.

[0003] However, due to the continuous optimization of the duplex mode in the New Radio (NR) system, the type of random access channel transmission opportunity is also changing, and how to design the transmission method of the random access channel is a problem that needs to be solved at present.

[0004] SUMMARY

[0005] The embodiments of the present application provide a transmission method, device, equipment, medium and product of a random access channel, and the technical solutions are as follows:

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

[0007] transmitting the random access channel based on at least one of a first variable and a second variable; wherein the first variable is used for transmission of the random access channel in a first type of transmission opportunity, and the second variable is used for transmission of the random access channel in a second type of transmission opportunity.

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

[0009] receiving the random access channel, which is transmitted based on at least one of a first variable and a second variable; wherein the first variable is used for transmission of the random access channel in a first type of transmission opportunity, and the second variable is used for transmission of the random access channel in a second type of transmission opportunity.

[0010] According to one aspect of the present application, a transmission device of a random access channel is provided, and the device comprises:

[0011] a sending module, configured to transmit the random access channel based on at least one of a first variable and a second variable; wherein the first variable is used for transmission of the random access channel in a first type of transmission opportunity, and the second variable is used for transmission of the random access channel in a second type of transmission opportunity.

[0012] According to an aspect of the present application, a transmission apparatus of a random access channel is provided, the apparatus comprising:

[0013] a receiving module configured to receive the random access channel, the random access channel being transmitted based on at least one of a first variable and a second variable; wherein the first variable is used for transmission of the random access channel in a first type of transmission opportunity, and the second variable is used for transmission of the random access channel in a second type of transmission opportunity.

[0014] According to an aspect of the present application, a terminal device is provided, the terminal device comprising:

[0015] a processor, a transceiver connected to the processor, and a memory configured to store executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement a transmission method of a random access channel.

[0016] According to an aspect of the present application, a network device is provided, the network device comprising:

[0017] a processor, a transceiver connected to the processor, and a memory configured to store executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement a transmission method of a random access channel.

[0018] According to an aspect of the present application, a computer readable storage medium is provided, the computer readable storage medium storing at least one program, the at least one program being loaded and executed by a processor to implement a transmission method of a random access channel.

[0019] According to an aspect of the present application, a chip is provided, the chip comprising programmable logic circuit and / or program instructions, when the chip is running on a first node, for implementing the above-mentioned transmission method of a random access channel.

[0020] According to an aspect of the present application, a computer program product is provided, the computer program product comprising computer instructions stored in a computer readable storage medium, the computer instructions being acquired by a processor from the computer readable storage medium, and the processor executing the computer instructions to implement a transmission method of a random access channel.

[0021] The technical solutions provided by the embodiments of the present application have at least the following beneficial effects:

[0022] Different variables are set for the first type of transmission opportunity and the second type of transmission opportunity, and the variable in the random access channel transmission process is determined based on the first variable corresponding to the first type of transmission opportunity and the second variable corresponding to the second type of transmission opportunity in the sending process of the random access channel, that is, the terminal device can determine the variable used for transmission under each type of random access channel transmission opportunity for different types of random access channel transmission opportunities, and send the random access channel according to the variable. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] FIG. 1 shows a schematic diagram of sub-band non-overlapping full duplex provided by the related art;

[0025] FIG. 2 shows a schematic diagram of PRACH power control provided by the related art;

[0026] FIG. 3 shows a schematic diagram of a mobile communication system provided by an example embodiment of the present application;

[0027] FIG. 4 shows a flowchart of a random access channel transmission method provided by some example embodiments of the present application;

[0028] FIG. 5 shows a flowchart of a random access channel transmission method provided by some example embodiments of the present application;

[0029] FIG. 6 shows a flowchart of a random access channel transmission method provided by some example embodiments of the present application;

[0030] FIG. 7 shows a flowchart of a random access channel transmission method provided by some example embodiments of the present application;

[0031] FIG. 8 shows a structural block diagram of a random access channel transmission apparatus provided by some example embodiments of the present application;

[0032] FIG. 9 shows a structural block diagram of a random access channel transmission apparatus provided by some example embodiments of the present application;

[0033] FIG. 10 shows a structural schematic diagram of a terminal device provided by an example embodiment of the present application;

[0034] FIG. 11 shows a structural schematic diagram of a network device provided by an example embodiment of the present application. DETAILED DESCRIPTION

[0035] For the purpose of clarity, technical solution and advantages of the present application will be further described in detail below with reference to the accompanying drawings. Herein, exemplary embodiments will be described in detail with reference to the accompanying drawings. The following description relates to the drawings, in which the same reference numerals refer to the same or similar elements throughout the several drawings. The embodiments described in the following exemplary embodiments do not represent all the implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the appended claims.

[0036] The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in the present application and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0037] It will be understood that, although the terms first, second, third, etc. can be used herein to describe various information, the information should not be limited to these terms. These terms are used only to distinguish one from another information. For example, a first information could be termed a second information, and, similarly, a second information could be termed a first information without departing from the scope of the present application. As used herein, the term "if' can be interpreted to mean "when" or "upon" or "in response to determining" depending on the context.

[0038] The technical solutions described in some embodiments of the present application can be applied to various communication systems, for example: 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, evolved system of NR 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 (WiFi), 5th-Generation (5G) system, cellular Internet of Things system, cellular passive Internet of Things system, and can also be applied to the evolved system after 5G NR system, and can also be applied to 6G and subsequent evolved systems.

[0039] It should be understood that in some embodiments of the present application, "5G" can also be referred to as "5G NR" or "NR".

[0040] It should be understood that in the description of the embodiments of the present application, the term "corresponding" can represent a direct or indirect corresponding relationship between the two, can also represent an associated relationship between the two, and can also indicate a relationship such as indicated, configured, and configured.

[0041] In embodiments of the present application, "predefined" can be implemented by pre-storing corresponding codes, tables or other means for indicating relevant information in devices (for example, including terminal devices and network devices), and the present application does not limit the specific implementation manner thereof. For example, predefined can refer to definition in a protocol.

[0042] In embodiments of the present application, "protocol" can refer to a standard protocol in the field of communication, for example, can include LTE protocol, NR protocol and relevant protocols applied in future communication systems, and the present application does not limit this.

[0043] Next, sub-band non-overlapping full duplex (SBFD) is introduced:

[0044] In order to overcome the problems of weak uplink coverage, large uplink delay and insufficient uplink capacity caused by less uplink resource allocation in time division duplex (TDD) technology, SBFD technology is proposed. SBFD technology refers to a technology that can simultaneously transmit and receive data on different sub-bands in the same subframe or the same time slot or the same symbol. SBFD technology is mainly used on the network device side, and the terminal device (UE) side remains in the current state, that is, only transmitting data or only receiving data in the same subframe / time slot / symbol. SBFD technology can also be referred to as cross division duplex (XDD) technology.

[0045] For example, SBFD technology is shown in FIG. 1, a part of the frequency domain resource corresponding to a downlink (DL) time domain unit is configured as an uplink sub-band. As shown in part (a) of FIG. 1, the middle sub-band of the frequency domain resource corresponding to a downlink time domain unit is configured as an uplink sub-band, or as shown in part (b) of FIG. 1, the upper part sub-band of the frequency domain resource corresponding to a downlink time domain unit is configured as an uplink sub-band.

[0046] Generally, SBFD operation meets the following points:

[0047] SBFD operates within a TDD carrier.

[0048] SBFD scheme design is within a single uplink / downlink BWP (Bandwidth Part) pair with aligned center frequency points.

[0049] • Within one TDD carrier, there is at most one UL sub-band on one SBFD symbol (including legacy UL symbol). This UL sub-band can be located in the middle of the TDD carrier or at both sides of the TDD carrier. In addition, the protocol agrees that the UL transmission can only be limited within the UL sub-band, and the DL reception can only be limited within the DL sub-band.

[0050] Next, the physical random access channel (PRACH) is introduced:

[0051] The PRACH related parameters are configured by the random access generic configuration (RACH-ConfigGeneric), and next the parameters in RACH-ConfigGeneric are described from three aspects of time domain resource configuration, frequency domain resource configuration and power control.

[0052] PRACH time domain resource configuration:

[0053] In 5G NR, the time domain resource corresponding to the random access channel is determined according to the PRACH configuration table, and there are three PRACH configuration tables corresponding to different frequency bands and frequency band modes: PRACH configuration table 1 is the PRACH configuration of FDD (Frequency Division Duplexing) frequency band on FR1 (Frequency Range 1), PRACH configuration table 2 is the PRACH configuration of TDD frequency band on FR1, and PRACH configuration table 3 is the PRACH configuration on FR2. The terminal device will determine the PRACH configuration table to be used when receiving the PRACH configuration according to the frequency band and frequency band mode of the cell it resides in.

[0054] When configuring the time domain resource corresponding to the cell random access channel for the terminal device, the corresponding PRACH configuration table is indicated by the related parameter prach-ConfigurationIndex. The terminal obtains the PRACH time domain resource configuration information of the cell according to the corresponding PRACH configuration table, and the time domain resource configuration information includes:

[0055] 1. The format of the PRACH sequence: all long and short sequence formats are configured on FR1, and only short sequence formats are configured on FR2.

[0056] 2. Configuration period and system frame number: the repetition period of the PRACH transmission opportunity and the system frame number where it is located, and NR supports 10ms, 20ms, 40ms, 80ms and 160ms period configurations.

[0057] 3. Subframe / slot number: The subframe number or the slot number of the PRACH transmission occasion within a system frame; where on FR1, it is indicated as the subframe number, which is also the 15KHz slot number; on FR2, it is indicated as the 60KHz slot number.

[0058] 4. For short sequences, the number of PRACH slots in one subframe or one 60KHz slot is also configured, when the random access sequence is configured with a larger subcarrier spacing, there are 2 PRACH slots in one subframe or one 60KHz slot, when the indicated value is 2, both of the 2 PRACH slots can be used; when the indicated value is 1, the latter PRACH slot is used by default.

[0059] 5. Starting symbol and duration: the starting position and the duration of the PRACH transmission occasion in one PRACH slot, the duration is the number of consecutive occurrences. Even with the same sequence format, the same periodicity and the same slot number configuration, different starting positions and durations can be configured, which can provide more PRACH density configurations.

[0060] PRACH power control:

[0061] The PRACH power control adopts an open-loop power control mechanism, and the UE sets the PRACH transmission power based on the expected received power configured by the network device and the path loss measured by the downlink reference signal and other factors:

[0062] The terminal determines the PRACH transmission power by the following formula: P PRACH，b，f，c (i) = min{P CMAX，f，c (i), P PRACH，target，f，c + pL b，f，c}[dBm]

[0063] Where f is the carrier; c is the serving cell; b is the BWP; i is the PRACH transmission occasion; P CMAX， f，c (i) is the maximum output power configured by the UE; P PRACH，target，f，c is the preamble target power; PL b，f，c is the path loss.

[0064] The calculation formula of the target received power PREAMBLE_RECEIVED_TARGET_POWER (referred to as the received power) is as follows.

[0065] PREAMBLE_RECEIVED_TARGET_POWER = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) x PREAMBLE_POWER_RAMPING_STEP

[0066] Wherein, the target power level (preambleReceivedTargetPower, referred to as power level) is configured by RRC (Radio Resource Control, Radio Resource Control) signaling; the preamble increment (DELTA_PREAMBLE) is determined based on at least one of the random access preamble format, the used subcarrier spacing, and the protocol agreed fixed value; the power ramping counter (PREAMBLE_POWER_RAMPING_COUNTER), which can also be referred to as the preamble power ramping number, is determined according to the power ramping counter, initialized to 1 at the beginning of each random access process, and increased by 1 each time the retransmission; the power ramping step (PREAMBLE_POWER_RAMPING_STEP), which can also be referred to as the preamble power ramping step, is used to indicate the step size of the power ramping.

[0067] In the random access process, if the UE sends PRACH but does not receive the RAR (Random Access Response, Random Access Response) response of the network or does not successfully receive the conflict resolution message, the UE needs to retransmit PRACH. When the NR UE supports multiple transmit beams, if the transmit beam remains unchanged when retransmitting, the received power of the retransmitted PRACH is ramped up based on the received power of the last transmitted PRACH, which can be understood as the retransmission number plus 1, or the power ramping counter plus 1, until the random access process is successfully completed. However, when the UE switches the transmit beam, considering the interference control and the delay of random access when switching the beam, the protocol agrees that the power ramping counter remains unchanged. As shown in FIG. 2, the oblique ellipse 11 represents the transmit beam used for this transmission, and the dashed ellipse 12 represents the transmit beam not used for this transmission. When the initial transmission, the first retransmission, and the second retransmission use the same transmit beam, the power ramping counter is increased by 1 when retransmitting. When the third retransmission uses a different transmit beam than the one used in the last transmission, the power ramping counter does not change. When the fourth retransmission uses the same transmit beam as the one used in the last transmission, the power ramping counter is increased by 1.

[0068] When the number of PRACH transmissions reaches the RRC configured parameter preambleTransMax (maximum number of preamble transmissions, also known as the maximum number of random access preamble transmissions), the random access problem is indicated to the higher layer, or the random access process is considered unsuccessful.

[0069] That is, at the beginning of the random access process, the MAC (Medium Access Control) layer initializes the power ramping counter and the random access preamble transmission counter to 1, if the UE sends PRACH but does not receive the RAR response of the network or does not successfully receive the conflict resolution message, the random access preamble transmission counter + 1 (indicating that the UE needs to retransmit PRACH), if the random access preamble transmission counter is greater than 1, the power ramping counter + 1, in this way, when setting the power, since PREAMBLE_RECEIVED_TARGET_POWER = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) × PREAMBLE_POWER_RAMPING_STEP, the power ramping of PRACH retransmission and the counting of the number of PRACH transmissions are naturally realized.

[0070] Random access channel transmission in SBFD symbols:

[0071] Currently, the agreement is that RACH transmission is supported in SBFD symbols for RRC IDLE / INACTIVE / CONNECTED state, and two RACH configuration options are supported: Option 1, i.e., for SBFD-aware UE and legacy UE to multiplex the same set of RACH configuration, for example, both use the RO configured in rach-ConfigCommon; Option 2, i.e., to define separate RACH configuration, one set of legacy RACH configuration and one set of additional RACH configuration. Regardless of which option, for SBFD-aware UE, two types of RACH occasions (ROs) are identified, legacy RO (e.g., RO in UL symbol and flexible symbol in Option 1, RO configured by legacy RACH configuration in Option 2) and additional RO (e.g., RO in SBFD-Dsymbol in Option 1, RO configured by additional RACH configuration in Option 2).

[0072] rach-ConfigCommon is used to configure the BWP for non-contention-based random access and contention-based random access and retransmission after contention-based random access failure. When Option 2 is adopted, the legacy RACH configuration is the configuration used traditionally, i.e., the rach-ConfigCommon set in the current protocol, and the additional RACH configuration is the configuration set for SBFD operation, i.e., the additional configuration based on rach-ConfigCommon.

[0073] FIG. 3 shows a schematic diagram of a mobile communication system according to an example embodiment of the present application. The mobile communication system includes a network device 110 and a terminal device 120, and can further include or not include a terminal device 130, which is not limited in the present application.

[0074] The network device 110 in the present application provides wireless communication functions, which includes but is not limited to: an evolved node B (eNB), a radio network controller (RNC), a node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (for example, a home evolved node B or a home node B, HNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (Wi-Fi) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc., and can also be a next generation node B (gNB) or a transmission point (TRP or TP) in a 5th generation (5G) mobile communication system, or an antenna panel 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), etc., or a base station in a beyond 5th generation (B5G) or a 6th generation (6G) mobile communication system, or a core network (CN), a fronthaul, a backhaul, a radio access network (RAN), a network slice, etc., or a serving cell, a primary cell (PCell), a primary secondary cell (PSCell), a special cell (SpCell), a secondary cell (SCell), a neighboring cell, etc., of a terminal device.

[0075] The terminal device 120 in the present application, also known as User Equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, user apparatus. The terminal includes but is not limited to: handheld devices, wearable devices, vehicle-mounted devices, and Internet of Things devices, etc., such as: mobile phones, tablet computers, e-book readers, laptop computers, desktop computers, televisions, game consoles, Mobile Internet Devices (MID), Augmented Reality (AR) terminals, Virtual Reality (VR) terminals, and Mixed Reality (MR) terminals, Extended Reality (XR) terminals, Baffle Reality (BR) terminals, Cinematic Reality (CR) terminals, Deceive Reality (DR) terminals, wearable devices, hand-held devices, electronic tags, controllers, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, wireless terminals in remote medical surgery, cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), television set-top boxes (STBs), customer premises equipment (CPE), etc.

[0076] In some embodiments, the network device 110 and the terminal device 120 communicate with each other through a certain air interface technology, such as the Uu interface.

[0077] Exemplarily, there are two communication scenarios between the network device 110 and the terminal device 120: an uplink communication scenario and a downlink communication scenario. The uplink communication, also referred to as uplink transmission, refers to transmitting a signal or data to the network device 110; and the downlink communication, also referred to as downlink transmission, refers to transmitting a signal or data to the terminal device 120.

[0078] In some embodiments, the terminal device 120 and the terminal device 130 communicate with each other through a certain air interface technology, for example, a PC5 interface.

[0079] Exemplarily, there are two communication scenarios between the terminal device 120 and the terminal device 130: a first sidelink communication scenario and a second sidelink communication scenario. The first sidelink communication refers to transmitting a signal from the terminal device 120 to the terminal device 130; and the second sidelink communication refers to transmitting a signal from the terminal device 130 to the terminal device 120.

[0080] In some embodiments, the terminal device 120 and the terminal device 130 are both in network coverage and located in the same cell, or the terminal device 120 and the terminal device 130 are both in network coverage but located in different cells, or the terminal device 120 is in network coverage but the terminal device 130 is out of network coverage.

[0081] In some embodiments of the present application, the "NR" can also be referred to as a 5G NR system or a 5G system. The 5G mobile communication system can include a non-standalone (Non-Stand Alone, NSA) and / or standalone (Stand Alone, SA).

[0082] The technical solutions provided by the embodiments in the application can also be applied to Machine Type Communication (MTC), Long Term Evolution-Machine (LTE-M), Device to Device (D2D) network, Machine to Machine (M2M) network, Internet of Things (IoT) network, or other networks. The IoT network may, for example, include a vehicle network. In the vehicle network, the communication modes are collectively referred to as Vehicle to X (V2X, X can represent any object), for example, the V2X can include Vehicle to Vehicle (V2V) communication, Vehicle to Infrastructure (V2I) communication, Vehicle to Pedestrian (V2P) communication, or Vehicle to Network (V2N) communication, and the like.

[0083] The mobile communication system provided by the embodiments in the application can be applied to, but is not limited to, at least one of the following communication scenarios: an uplink communication scenario, a downlink communication scenario, and a sidelink communication scenario.

[0084] FIG. 4 shows a flowchart of a transmission method of a random access channel provided by an example embodiment of the application. The method is performed by a terminal device, which can be the terminal device shown in FIG. 3. The method includes:

[0085] In step 210, the random access channel is transmitted based on at least one of the first variable and the second variable.

[0086] The first variable is used for transmission of the random access channel in the first type of transmission opportunity, and the second variable is used for transmission of the random access channel in the second type of transmission opportunity. That is, the first variable is used when the random access channel is transmitted in the first type of transmission opportunity, and the second variable is used when the random access channel is transmitted in the second type of transmission opportunity.

[0087] The first type of transmission opportunity and the second type of transmission opportunity can be understood as transmission opportunities using two different duplex modes.

[0088] In some embodiments, the terminal device selects the first type of transmission opportunity or the second type of transmission opportunity to transmit the random access channel according to at least one of the first variable and the second variable; or, the terminal device selects the first type of transmission opportunity or the second type of transmission opportunity, and then transmits the random access channel according to the first variable corresponding to the first type of transmission opportunity or the second variable corresponding to the second type of transmission opportunity. For example, the terminal device determines to select the first type of transmission opportunity to transmit the random access channel according to a first part of the first variable and the second variable, and a variable in a transmission process of the random access channel is determined by a second part of the first variable. Or, the terminal device selects the first type of transmission opportunity and transmits the random access channel according to the first variable; or, the terminal device selects the second type of transmission opportunity and transmits the random access channel according to the second variable.

[0089] In summary, the method provided by the embodiments of the present application sets different variables for the first type of transmission opportunity and the second type of transmission opportunity, and determines a variable in a transmission process of the random access channel based on the first variable corresponding to the first type of transmission opportunity and the second variable corresponding to the second type of transmission opportunity in the transmission process of the random access channel, that is, the terminal device can determine a variable used for transmission under each type of random access channel transmission opportunity for different types of random access channel transmission opportunities, and transmit the random access channel according to the variable.

[0090] FIG. 5 shows a flowchart of a random access channel transmission method provided by an example embodiment of the present application. The method is performed by a network device, which can be the network device shown in FIG. 3. The method includes:

[0091] Step 310: receiving a random access channel, the random access channel being transmitted based on at least one of a first variable and a second variable.

[0092] The first variable is used for transmission of the random access channel in the first type of transmission opportunity, and the second variable is used for transmission of the random access channel in the second type of transmission opportunity. That is, the variable used by the random access channel when transmitted in the first type of transmission opportunity is the first variable, and the variable used by the random access channel when transmitted in the second type of transmission opportunity is the second variable.

[0093] The first type of transmission opportunity and the second type of transmission opportunity can be understood as transmission opportunities using two different duplex modes.

[0094] In some embodiments, the random access channel is transmitted by the terminal according to at least one of the first variable and the second variable, or the terminal device selects the first type of transmission opportunity or the second type of transmission opportunity, and then transmits the random access channel according to the first variable corresponding to the first type of transmission opportunity or the second variable corresponding to the second type of transmission opportunity. For example, the terminal device determines to select the first type of transmission opportunity to transmit the random access channel according to a first part of the first variable and the second variable, and a second part of the first variable determines the variable in the transmission process of the random access channel. Or, the terminal device selects the first type of transmission opportunity and transmits the random access channel according to the first variable, or the terminal selects the second type of transmission opportunity and transmits the random access channel according to the second variable.

[0095] In summary, the method provided by the embodiments of the present application is that the received random access channel is transmitted by the terminal device based on the first variable corresponding to the first type of transmission opportunity and the second variable corresponding to the second type of transmission opportunity in the transmission process of the random access channel by setting different variables for the first type of transmission opportunity and the second type of transmission opportunity, that is, the network device receives the random access channel transmitted by the terminal device according to the variable used for transmission of each type of random access channel transmission opportunity determined by the terminal device for different types of random access channel transmission opportunities.

[0096] Next, the first type of transmission opportunity and the second type of transmission opportunity will be briefly introduced.

[0097] In some embodiments, the first type of transmission opportunity is a non-SBFD symbol associated RO, and the second type of transmission opportunity is an SBFD symbol associated RO. It can also be said that the first type of transmission opportunity is a non-SBFD time domain resource associated RO, and the second type of transmission opportunity is an SBFD time domain resource associated RO. The time domain resource includes at least one of the following: symbol, symbol group, time slot, sub-slot, frame, sub-frame. The specific type of time domain resource in the embodiments of the present application is not limited. Among them, the SBFD symbol is a symbol including at least one of the uplink sub-band, the downlink sub-band, and the guard band, and the non-SBFD symbol (i.e. non-SBFD symbol) is a symbol not including the above sub-band. That is, the above "the first variable is used for transmission of the random access channel in the first type of transmission opportunity, and the second variable is used for transmission of the random access channel in the second type of transmission opportunity" can be understood as the first variable is used for transmission of the random access channel in the first type of time domain resource, and the second variable is used for transmission of the random access channel in the second type of time domain resource. The first type of time domain resource is a non-SBFD symbol, and the second type of time domain resource is an SBFD symbol. The second type of time domain resource is a time domain resource type containing an uplink sub-band and / or a downlink sub-band. For example, the second type of time domain resource is at least one of an SBFD symbol, an SBFD time slot, and an SBFD sub-frame.

[0098] In some embodiments, the first type of time domain resource and the second type of time domain resource can be understood as two different duplex modes, time slots or symbols, etc. The number, position, size, and frequency domain bandwidth of the available uplink resources in the first type of time domain resource and the second type of time domain resource are different; or in other words, the number, position, size, and frequency domain bandwidth of the random access channel in the first type of time domain resource and the second type of time domain resource are different. For example, the first type of time domain resource is a non-SBFD symbol, and the second type of time domain resource is an SBFD symbol. Among them, the SBFD symbol is a symbol including at least one of the uplink sub-band, the downlink sub-band, and the guard band, and the non-SBFD symbol is a symbol not including the above sub-band.

[0099] The non-SBFD symbol associated RO can be understood as an RO located in a non-SBFD symbol, an RO in a non-SBFD symbol, etc.; the SBFD symbol is the same, the SBFD symbol associated RO can be understood as an RO located in an SBFD symbol, an RO in an SBFD symbol, etc.; the non-SBFD time domain resource associated RO can be understood as an RO located in a non-SBFD time domain resource, an RO in a non-SBFD time domain resource, etc.; the SBFD time domain resource is the same, the SBFD time domain resource associated RO can be understood as an RO located in an SBFD time domain resource, an RO in an SBFD time domain resource, etc.

[0100] 1. The first type of transmission opportunity.

[0101] The first type of transmission opportunity includes at least one of the following: RO in non-SBFD symbol; RO in flexible symbol; legacy RO; RO configured in the first random access channel configuration. The flexible symbol is a symbol without a determined transmission direction, and the flexible symbol can be instructed to perform uplink or downlink transmission according to control signaling. The flexible symbol can be a symbol configured as a flexible symbol in the uplink and downlink common configuration signaling. The legacy RO is a RO applicable to a legacy UE mentioned in the “random access channel transmission in SBFD symbol” above, or in other words, the legacy RO is a RO in the related art. The first random access channel configuration is used to configure cell-specific random access parameters, that is, the legacy RACH configuration mentioned in the “random access channel transmission in SBFD symbol” above, that is, the rach-ConfigCommon set in the current protocol.

[0102] 2. The second type of transmission opportunity.

[0103] The second type of transmission opportunity includes at least one of the following: RO in SBFD symbol; RO in SBFD symbol configured as downlink in the uplink and downlink common configuration signaling; RO configured in the second random access channel configuration. The SBFD symbol configured as downlink in the uplink and downlink common configuration signaling is the SBFD symbol configured as downlink by tdd-UL-DL-ConfigurationCommon. The second random access channel configuration is a configuration other than the first random access channel configuration, that is, the Additional RACH configuration mentioned in the “random access channel transmission in SBFD symbol” above.

[0104] Next, the variables of the random access channel when transmitting in the first type of transmission opportunity or the second type of transmission opportunity are introduced.

[0105] 3. The first variable and the second variable.

[0106] That is, the first variable and / or the second variable comprises at least one of the following variables: received power; power level; maximum number of transmissions of a random access preamble; power ramping step size of a random access channel; power ramping counter; random access preamble transmission counter. In other words, the first variable comprises at least one of the following variables: received power; power level; maximum number of transmissions of a random access preamble; power ramping step size of a random access channel; power ramping counter; random access preamble transmission counter. The second variable comprises at least one of the following variables: received power; power level; maximum number of transmissions of a random access preamble; power ramping step size of a random access channel; power ramping counter; random access preamble transmission counter. Wherein, the received power is used to indicate how much energy the terminal device will use to send the random access channel; the power level is used to indicate the received power of the random access channel expected by the receiver of the network device; the power ramping counter is used to indicate the number of power ramping, generally, the random access preamble transmission counter is increased by 1 after each random access failure, and the power ramping counter is increased by 1 if the random access channel is to be transmitted when the random access preamble transmission counter is greater than 1; the random access preamble transmission counter is used to indicate the number of transmissions of the random access preamble (referred to as preamble) in the random access process, i.e. the number of transmissions of the random access channel; the maximum number of transmissions of the random access preamble is used to indicate the maximum number of transmissions of the preamble in the entire random access process, i.e. the maximum number of transmissions of the random access channel; and the power ramping step size of the random access channel is used to indicate the power increase amount of each power ramping.

[0107] In some embodiments, the variable types in the first variable and the second variable can be the same or different; and the variable values of the same type of variable in the first variable and the second variable can be the same or different. The embodiments of the present application do not limit this. For example, the first variable comprises a power level, a maximum number of transmissions of a random access preamble, and a power ramping step size of a random access channel, and the second variable comprises a power level, a maximum number of transmissions of a random access preamble, a power ramping step size of a random access channel, and a power ramping counter; or, the first variable and the second variable both comprise a power level, a maximum number of transmissions of a random access preamble, and a power ramping step size of a random access channel.

[0108] By way of example but not limitation, the first variable comprises a power level of 20 dBm, and the second variable comprises a power level of -10 dBm; or, the power levels in the first variable and the second variable are both 10 dBm, and the first variable comprises a power ramping step size of a random access channel of 2 dB, and the second variable comprises a power ramping step size of a random access channel of 4 dB.

[0109] In the random access procedure, a major factor affecting the transmission result of the random access channel is the reception power. If the reception power of the random access channel is too small, the network is likely to fail to receive the random access channel transmitted by the terminal device, which can be regarded as a transmission failure of the random access channel. In the case of transmission failure determined by the terminal device, the reception power of the random access channel will be subjected to power climbing, and the random access channel will be transmitted again based on the climbed reception power until the transmission times reach the maximum transmission times. For terminal devices supporting the use of two types of transmission resources, the random access channel is usually transmitted using the two types of transmission resources in the random access procedure.

[0110] In a possible implementation, the terminal device randomly selects the first type of transmission opportunity and the second type of transmission opportunity at each transmission of the random access channel.

[0111] In another possible implementation, the terminal device can switch to the transmission opportunity of the other type after using the transmission opportunity of one type (the first type of transmission opportunity or the second type of transmission opportunity) for a certain number of times. For example, the terminal device switches to the second type of transmission opportunity after transmitting the random access channel for n times using the first type of transmission opportunity. The transmission times of the first type of transmission opportunity and the second type of transmission opportunity are the same or different.

[0112] Regardless of which of the above two implementations is used, it is necessary to consider how to design the calculation method of the reception power of the random access channel, that is, to design the power control method of the random access channel.

[0113] The calculation method of the reception power is as follows:

[0114] The calculation method of the reception power is as follows:

[0115] The calculation method of the reception power is as follows:

[0116] For the reception power, the transmission of the random access channel can be attempted again with a reception power that can be increased in case of a failure of the current transmission. The increase of the reception power, which can also be referred to as power ramping, reception power boosting, etc., mainly involves two variables, a power ramping step and a power ramping counter. Thus, the design can also be based on these two variables. First, a power ramping step is set for the first type of transmission opportunity and the second type of transmission opportunity, i.e., the first type of transmission opportunity corresponds to a first power ramping step, and the second type of transmission opportunity corresponds to a second power ramping step. It can also be understood that the first variable includes the first power ramping step, and the second variable includes the second power ramping step. The different types of transmission opportunities correspond to different power ramping steps, which can more effectively manage the interference on different types of transmission opportunities. For the second type of transmission opportunity located in the SBFD symbol, the random access channel transmitted on the transmission opportunity can interfere with the downlink transmission (such as the transmission using the downlink subband in the SBFD symbol), and thus the power ramping step for the second type of transmission opportunity can be set to be smaller to avoid interference with the downlink transmission in the same symbol. It should be noted that the calculation method of the reception power provided in the embodiments of the present application is also applicable to the case where the first type of transmission opportunity and the second type of transmission opportunity correspond to the same power ramping step. The embodiments of the present application are exemplarily described in the case where the first type of transmission opportunity and the second type of transmission opportunity correspond to different power ramping steps, but the protection scope of the embodiments of the present application is not limited thereto.

[0117] At this time, the reception power of the random access channel is determined based on at least one of the first power ramping step and the second power ramping step, i.e., the reception power included in the first variable or the second variable is determined based on at least one of the first power ramping step and the second power ramping step. If the random access channel is transmitted in the first type of transmission opportunity, the reception power of the random access channel is the reception power in the first variable. If the random access channel is transmitted in the second type of transmission opportunity, the reception power of the random access channel is the reception power in the second variable.

[0118] Based on the first variable including the first power ramping step and the second variable including the second power ramping step, there are two design ideas. The first design idea is that the first type of transmission opportunity and the second type of transmission opportunity correspond to the same power ramping counter. The second design idea is that the first type of transmission opportunity and the second type of transmission opportunity correspond to a power ramping counter respectively.

[0119] Next, the calculation methods of the above three reception powers will be further introduced in combination with the setting of the power ramping step and the power ramping counter in the first design idea and the second design idea (the introduction order does not limit the advantages and disadvantages of the power ramping methods).

[0120] It should be noted that the random access channel corresponds to the first type of transmission opportunity, which can be understood as the random access channel corresponding to the first type of time domain resource; the random access channel corresponds to the second type of transmission opportunity, which can be understood as the random access channel corresponding to the second type of time domain resource.

[0121] The calculation method of the received power is accumulation.

[0122] The accumulation calculation method is that the received power of the random access channel of the current transmission is determined based on the received power of the random access channel of the last transmission and the power ramping step corresponding to the current transmission. For example, when the first variable and the second variable further include the same power ramping counter, in the case that the random access channel of the i+1th transmission corresponds to the first type of transmission opportunity, the received power of the random access channel of the i+1th transmission is determined based on the received power of the ith transmission and the first power ramping step, and the received power of the random access channel of the ith transmission is determined based on at least one of the first power ramping step and the second power ramping step and the power ramping counter, i being a positive integer; in the case that the random access channel of the i+1th transmission corresponds to the second type of transmission opportunity, the received power of the random access channel of the i+1th transmission is determined based on the received power of the ith transmission and the second power ramping step. In other words, when the first variable and the second variable further include the same power ramping counter, in the case that the random access channel of the i+1th transmission corresponds to the first type of transmission opportunity, the received power corresponding to the random access channel of the i+1th transmission is determined based on the received power of the ith transmission and the first power ramping step, and the received power of the random access channel of the ith transmission is determined based on at least one of the first power ramping step and the second power ramping step and the power ramping counter, i being a positive integer; in the case that the random access channel of the i+1th transmission corresponds to the second type of transmission opportunity, the received power corresponding to the random access channel of the i+1th transmission is determined based on the received power of the ith transmission and the second power ramping step. Wherein, the first variable and the second variable include the same power ramping counter means that there is only one power ramping counter in the terminal, or in other words, only one power ramping counter is enabled in the random access process.

[0123] The received power of the random access channel can also be determined based on a first accumulated sum, which is determined based on at least one of the first power ramping step and the second power ramping step and the power ramping counter. For example, the first accumulated sum is an accumulated sum of a first number of power ramping steps, the first number is determined based on the power ramping counter, and each of the first number of power ramping steps is one of the first power ramping step and the second power ramping step, e.g., the ith power ramping step is the first power ramping step or the second power ramping step, which is determined based on the type of transmission opportunity corresponding to the ith transmission or retransmission of the random access channel (if the ith transmission or retransmission of the random access channel corresponds to the first type of transmission opportunity, the ith power ramping step is the first power ramping step; if the ith transmission or retransmission of the random access channel corresponds to the second type of transmission opportunity, the ith power ramping step is the second power ramping step). For example, the first number is 4, and the first accumulated sum is an accumulated sum of 4 of the first power ramping step and / or the second power ramping step, e.g., 1 of the first power ramping step and 3 of the second power ramping step, 0 of the first power ramping step and 4 of the second power ramping step, 2 of the first power ramping step and 2 of the second power ramping step, etc.

[0124] For example, "the received power of the ith+1 transmission of the random access channel is determined based on the received power of the ith transmission and the first power ramping step if the ith+1 transmission of the random access channel corresponds to the first type of transmission opportunity" is equivalent to "the received power of the current transmission of the random access channel is determined based on the received power of the last transmission and the first power ramping step if the current transmission of the random access channel corresponds to the first type of transmission opportunity"; and "the received power of the ith+1 transmission of the random access channel is determined based on the received power of the ith transmission and the second power ramping step if the ith+1 transmission of the random access channel corresponds to the second type of transmission opportunity" is equivalent to "the received power of the current transmission of the random access channel is determined based on the received power of the last transmission and the second power ramping step if the current transmission of the random access channel corresponds to the second type of transmission opportunity".

[0125] For example, the calculation of the received power is as follows.

[0126] In the formula, preambleReceivedTargetPower is a power level, usually configured by RRC signaling; DELTA_PREAMBLE represents a preamble increment, determined based on at least one of a random access preamble format, a used subcarrier spacing, and a fixed value agreed by a protocol; i represents a retransmission number, preamble_power_ranmping_counter represents a power ramping counter, and PREAMBLE_POWER_RAMPI NG_STEP_i represents a power ramping step corresponding to the i-th retransmission, which is determined based on a random access channel used for the i-th retransmission, i.e., if the random access channel for the i-th retransmission is a first type of transmission opportunity, then PREAMBLE_POWER_RAMPING_STEP_i = PREAMBLE_POWER_RAMPING_STEP_1, and PREAMBLE_POWER_RAMPING_STEP_1 is a first power ramping step; if the random access channel for the i-th retransmission is a second type of transmission opportunity, then PREAMBLE_POWER_RAMPING_STEP_i = PREAMBLE_POWER_RAMPING_STEP_2, and PREAMBLE_POWER_RAMPING_STEP_2 is a second power ramping step.

[0127] For example, the first number determined based on the power ramping counter can be represented as the first number being the power ramping counter minus 1.

[0128] By way of example and not limitation, the first power ramping step is 2, and the second power ramping step is 1. When the calculation formula of the received power is used for calculation, before the first transmission (i.e., initial transmission) starts, the power ramping counter is initialized to 1, i.e., when the first transmission is performed, When the first transmission is performed, the received power calculated is equal whether the random access channel uses the first type of transmission opportunity or the second type of transmission opportunity. After the first transmission fails, the second transmission is started, at which time the power ramping counter is incremented by 1, and the power ramping counter is 2. When the random access channel for the second transmission corresponds to the first type of transmission opportunity, the second transmission is performed, After the second transmission fails, the third transmission is started, at which time the power ramping counter is incremented by 1, and the power ramping counter is 3. When the random access channel for the third transmission corresponds to the second type of transmission opportunity, the third transmission is performed, ……; until the random access succeeds or the terminal device determines that the random access fails. The second transmission can be referred to as the first retransmission, the third transmission can be referred to as the second retransmission, the ith transmission can be referred to as the (i-1)th retransmission, and the (i+1)th transmission can be referred to as the ith retransmission.

[0129] As can be seen from the formula, the calculation manner of the accumulation is that the power ramping step by which the received power of the current transmission needs to be increased is added to the received power of the previous transmission.

[0130] It should be noted that the first power ramping step in the above formula can be written as

[0131] That is, starting from the second transmission (the first retransmission),

[0132] In the formula, j represents the transmission number, PREAMBLE_POWER_RAMPING_STEP_j represents the power ramping step corresponding to the jth transmission, which is determined based on the random access channel used for the jth transmission, that is, if the random access channel for the jth transmission is the first type of transmission opportunity, then PREAMBLE_POWER_RAMPING_STEP_j=PREAMBLE_POWER_RAMPING_STEP_1, and PREAMBLE_POWER_RAMPING_STEP_1 is the first power ramping step; if the random access channel for the jth transmission is the second type of transmission opportunity, then PREAMBLE_POWER_RAMPING_STEP_j=PREAMBLE_POWER_RAMPING_STEP_2, and PREAMBLE_POWER_RAMPING_STEP_2 is the second power ramping step.

[0133] On the other hand, in addition to the power ramping step and the received power, the first variable and the second variable can also be set to have the same or different power levels, maximum transmission numbers of random access preambles, and random access preamble transmission counters.

[0134] For example, the first variable further includes a first power level, and the second variable further includes a second power level. In this case, the calculation formula of the first received power when the random access channel uses the first type of transmission opportunity and the second received power when the random access channel uses the second type of transmission opportunity is as follows.

[0135] ​In the formula, preambleReceivedTargetPower_1 represents the first power level, and preambleReceivedTargetPower_2 represents the second power level. Optionally, the second power level is less than the first power level.

[0136] It should be noted that the above-listed calculation formula of the received power only involves four variables, i.e., the power level, the preamble increment, the power ramping step, and the power ramping counter, but in actual use, other variables can also be added to the calculation formula of the received power according to actual needs. For example, in the case of a backoff mechanism related to a random access process, the calculation formula of the received power can also add a variable of a power offset (POWER_OFFSET_2STEP_RA). The POWER_OFFSET_2STEP_RA is a power offset existing when the power of the MsgA preamble is increased (which can also be referred to as a power boost), and is initialized to 0 dB. The MsgA is a process used by a terminal device to send a random access channel in a two-step random access, and is similar to Msg1 in a four-step random access.

[0137] For example, taking the calculation formula shown in the calculation method one of the received power as an example, the formula can also be as shown in the following formula.

[0138] In summary, the method provided by the embodiments of the present application provides a new calculation method of the received power by using the cumulative method to calculate the received power. In addition, the power ramping step is set for the first variable and the second variable respectively, which can realize that different types of ROs correspond to different power ramping steps, so that interference management on different types of transmission opportunities can be more effective. For example, the random access channel transmitted on the RO in the SBFD symbol can interfere with the downlink transmission, so the power ramping step can be set to be smaller to avoid interference with the downlink transmission in the same symbol. Moreover, the terminal device only needs to maintain one power ramping counter, which is relatively simple to implement for the terminal device.

[0139] Calculation method two of the received power: calculation based on the offset value.

[0140] The calculation manner based on the offset value is adding an offset value to the received power based on the calculation formula shown in the related art. The offset value represents the offset of the power ramping of the first type of transmission opportunity relative to the power ramping of the second type of transmission opportunity; or, the offset value represents the offset of the power ramping of the second type of transmission opportunity relative to the power ramping of the first type of transmission opportunity; or, the offset value represents the offset of the power ramping of the first type of transmission opportunity before the current transmission relative to the power ramping of the second type of transmission opportunity; or, the offset value represents the offset of the power ramping of the second type of transmission opportunity before the current transmission relative to the power ramping of the first type of transmission opportunity; or, the offset value at the i-th transmission represents the offset of the total power ramping of the second type of transmission opportunity in the previous i-1 transmissions relative to the total power ramping of the first type of transmission opportunity; or, the offset value at the i-th transmission represents the offset of the total power ramping of the first type of transmission opportunity in the previous i-1 transmissions relative to the total power ramping of the second type of transmission opportunity. Wherein, i is a positive integer greater than 2, and the total power ramping is the sum of the power ramping of each transmission relative to the previous transmission.

[0141] The calculation manner based on the offset value is applicable to the design idea one and the design idea two. Therefore, the calculation manner based on the offset value using the design idea one and the calculation manner based on the offset value using the design idea two will be introduced respectively.

[0142] 1. Using the design idea one: the first type of transmission opportunity and the second type of transmission opportunity correspond to the same power ramping counter.

[0143] In some embodiments, the first variable and the second variable further include the same power ramping counter; the received power of the random access channel is determined based on the power ramping counter, the first power ramping step and the first offset value, and the first offset value represents the offset of the power ramping of the second type of transmission opportunity relative to the power ramping of the first type of transmission opportunity; or, the received power of the random access channel is determined based on the power ramping counter, the second power ramping step and the second offset value, and the second offset value represents the offset of the power ramping of the first type of transmission opportunity relative to the power ramping of the second type of transmission opportunity. Wherein, the first variable and the second variable including the same power ramping counter means that there is only one power ramping counter in the terminal, or in other words, only one power ramping counter is enabled in the random access process.

[0144] In some embodiments, the reception power of the random access channel is determined based on a first product and a first offset value, the first product being determined based on the power ramping counter and a first power ramping step; or, the reception power of the random access channel is determined based on a second product and a second offset value, the second product being determined based on the power ramping counter and a second power ramping step. For example, the first product is a difference between the power ramping counter and 1 multiplied by the first power ramping step; and the second product is a difference between the power ramping counter and 1 multiplied by the second power ramping step.

[0145] For example, the reception power of the random access channel is determined based on the following formula.

[0146] reception power = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) x PREAMBLE_POWER_RAMPING_STEP_1 + POWER_OFFSET_2;

[0147] or, reception power = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) x PREAMBLE_POWER_RAMPING_STEP_2 + POWER_OFFSET_1.

[0148] wherein, PREAMBLE_POWER_RAMPING_COUNTER is the power ramping counter; PREAMBLE_POWER_RAMPING_STEP_1 is the first power ramping step; PREAMBLE_POWER_RAMPING_STEP_2 is the second power ramping step; POWER_OFFSET_2 is the first offset value; and POWER_OFFSET_1 is the second offset value.

[0149] wherein, the first offset value is determined based on the following formula: POWER_OFFSET_2 = (PREAMBLE_POWER_RAMPING_COUNTER - 1) x (PREAMBLE_POWER_RAMPING_STEP_2 - PREAMBLE_POWER_RAMPING_STEP_1).

[0150] The calculation formula of the second offset value is POWER_OFFSET_1 = (PREAMBLE_POWER_RAMPING_COUNTER - 1) x (PREAMBLE_POWER_RAMPING_STEP_1 - PREAMBLE_POWER_RAMPING_STEP_2).

[0151] That is, the first offset value is determined based on the power ramping counter, the first power ramping step and the second power ramping step; and the second offset value is determined based on the power ramping counter, the first power ramping step and the second power ramping step.

[0152] For example, the first offset value is determined based on the product of a first difference value and a second difference value, the first difference value being the power ramping counter minus 1, and the second difference value being the difference between the second power ramping step and the first power ramping step; and the second offset value is determined based on the product of a third difference value and a fourth difference value, the third difference value being the power ramping counter minus 1, and the fourth difference value being the difference between the first power ramping step and the second power ramping step.

[0153] In other words, the reception power of the random access channel is determined based on the power ramping counter, the first power ramping step and the second power ramping step.

[0154] On the other hand, the first variable and the second variable can be the same or different in addition to the power ramping step and the reception power, and can also be set as a power level, a maximum number of random access preamble transmissions, a random access preamble transmission counter.

[0155] It should be noted that the above-listed calculation formula of the reception power only involves the four variables of the power level, the preamble increment, the power ramping step and the power ramping counter, but in actual use, other variables can also be added to the calculation formula of the reception power according to actual needs. For example, in the case of a backoff mechanism related to the random access process, a power offset (POWER_OFFSET_2STEP_RA) can also be added to the calculation formula of the reception power, POWER_OFFSET_2STEP_RA being a power offset existing when the power of the inherited MsgA preamble is increased (also referred to as a power boost), and being initialized to 0 dB. MsgA is a process used by a terminal device to transmit a random access channel in a two-step random access, and is similar to Msg1 in a four-step random access.

[0156] The calculation timing of the first offset value and / or the second offset value, and the use of the calculation formula of the reception power of the random access channel, can be flexibly set according to the channel interference caused by using different types of transmission opportunities, the delay requirement for the random access process, and the like.

[0157] For example, in case of initial transmission selecting the first type of transmission opportunity for transmission, the first type of transmission opportunity adopts the conventional calculation formula of received power, and the second type of transmission opportunity adopts the above calculation formula.

[0158] That is, the first received power = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) x PREAMBLE_POWER_RAMPING_STEP_1;

[0159] The second received power = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) x PREAMBLE_POWER_RAMPING_STEP_2 + POWER_OFFSET_1.

[0160] In the formula, PREAMBLE_POWER_RAMPING_STEP_1 represents the first power ramping step, PREAMBLE_POWER_RAMPING_STEP_2 represents the second power ramping step, and POWER_OFFSET_1 represents the second offset value.

[0161] At this time, in case of the second type of transmission opportunity corresponding to the random access channel, the received power of the random access channel is determined based on the second product and the second offset value, and the second product is determined based on the power ramping counter and the second power ramping step.

[0162] Or, in case of initial transmission selecting the second type of transmission opportunity for transmission, the second type of transmission opportunity adopts the conventional calculation formula of received power, and the first type of transmission opportunity adopts the above calculation formula.

[0163] That is, the first received power = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) x PREAMBLE_POWER_RAMPING_STEP_1 + POWER_OFFSET_2;

[0164] The second received power = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) x PREAMBLE_POWER_RAMPING_STEP_2.

[0165] In the formula, PREAMBLE_POWER_RAMPING_STEP_1 represents the first power ramping step, PREAMBLE_POWER_RAMPING_STEP_2 represents the second power ramping step, and POWER_OFFSET_2 represents the first offset value.

[0166] At this time, in the case that the random access channel corresponds to the first type of transmission opportunity, the reception power of the random access channel is determined based on a first product and the first offset value, the first product being determined based on the power ramping counter and the first power ramping step.

[0167] The calculation of the offset value including the first offset value and the second offset value is performed before the switching of the transmission opportunity type, i.e., the offset value is recalculated every time the type of RO changes, and the offset value will be used until the next change of the type of RO.

[0168] Next, the conventional calculation formula of the reception power is used for the first type of transmission opportunity, and the above calculation formula is used for the second type of transmission opportunity. Assuming that the first power ramping step is 2, the second power ramping step is 1, and the other part of the reception power preambleReceivedTargetPower+DELTA_PREAMBLE is x; at the first transmission, since the first type of transmission opportunity is used, the conventional calculation formula is used, and the final calculated reception power of the first transmission is x, and the calculation parameters and results of the reception power are shown in Table 1; at the second transmission, the first type of transmission opportunity is still used, and the final calculated reception power of the second transmission is x+2; at the third transmission, the type of RO changes, and the second offset value (i.e., the offset of the power ramping of the first type of transmission opportunity relative to the power ramping of the second type of transmission opportunity) is calculated, at this time, the calculated second offset value is 1, and in the calculation of the reception power, the reception power of the third transmission is x+3; at the fourth transmission, the second type of transmission opportunity is still used, the second offset value is 1, and the reception power is x+4; at the fifth transmission, the second type of transmission opportunity is still used, the second offset value is 1, and the reception power is x+5.

[0169] Table 1. Calculation results of reception power

[0170] It should be noted that when the type of RO changes, the power ramping counter continues to increase by 1 in the embodiments of the present application, but in actual implementation, the power ramping counter can also be unchanged or reset when the type of RO changes, so as to better match the interference conditions of different types of RO.

[0171] For example, when the type of RO is switched, the power ramping counter is not reset, as shown in Table 2. When the third transmission is switched from the first type of transmission opportunity to the second type of transmission opportunity, the power ramping counter is still 2, which is the value of the second transmission.

[0172] Table 2. Calculation result of received power

[0173] For example, when the type of RO is switched, the power ramping counter is reset, as shown in Table 3. When the third transmission is switched from the first type of transmission opportunity to the second type of transmission opportunity, the power ramping counter is reset to 1.

[0174] Table 3. Calculation result of received power

[0175] In summary, the method provided by the embodiments of the present application provides a new calculation method of received power by using the offset value to calculate the received power. In addition, the power ramping step is set for the first variable and the second variable respectively, so that different types of ROs correspond to different power ramping steps, which can more effectively manage the interference on different types of transmission opportunities. For example, the random access channel transmitted by the RO in the SBFD symbol can interfere with the downlink transmission, so the power ramping step can be set to be smaller to avoid interference with the downlink transmission in the same symbol. Moreover, the terminal device only needs to maintain one power ramping counter, which is relatively simple to implement for the terminal device.

[0176] 2. Adopting the second design idea: the first type of transmission opportunity and the second type of transmission opportunity correspond to different power ramping counters.

[0177] In some embodiments, the first variable and the second variable further include a third power ramping counter, and the first variable or the second variable further includes a fourth power ramping counter. That is, the third power ramping counter is used to record the total number of power ramping when the random access channel is transmitted in the first type of transmission opportunity and the second type of transmission opportunity, and the fourth power ramping counter is used to record the number of power ramping when the random access channel is transmitted in the first type of transmission opportunity or the second type of transmission opportunity. For example, the third power ramping counter is used to record the total number of power ramping when the random access channel is transmitted in the first type of transmission opportunity and the second type of transmission opportunity, and the first variable and the second variable include the third power ramping counter. The fourth power ramping counter is used to record the number of power ramping when the random access channel is transmitted in the second type of transmission opportunity, and the second variable further includes the fourth power ramping counter; or, the fourth power ramping counter is used to record the number of power ramping when the random access channel is transmitted in the first type of transmission opportunity, and the first variable further includes the fourth power ramping counter.

[0178] At this time, the reception power of the random access channel is determined based on the third power ramping counter, the first power ramping step, and a third offset value representing an offset value of the power ramping of the second type of transmission opportunity relative to the power ramping of the first type of transmission opportunity; or, the reception power of the random access channel is determined based on the third power ramping counter, the second power ramping step, and a fourth offset value representing an offset value of the power ramping of the first type of transmission opportunity relative to the power ramping of the first type of transmission opportunity.

[0179] In some embodiments, the reception power of the random access channel is determined based on a third product and the third offset value, the third product being determined based on the third power ramping counter and the first power ramping step; or, the reception power of the random access channel is determined based on a fourth product and the fourth offset value, the fourth product being determined based on the third power ramping counter and the second power ramping step. For example, the third product is a difference between the third power ramping counter and 1 multiplied by the first power ramping step; the fourth product is a difference between the third power ramping counter and 1 multiplied by the second power ramping step.

[0180] For example, the calculation formula of the reception power of the random access channel is as follows.

[0181] Reception power = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) x PREAMBLE_POWER_RAMPING_STEP_1 + POWER_OFFSET_2;

[0182] Or, reception power = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) x PREAMBLE_POWER_RAMPING_STEP_2 + POWER_OFFSET_1.

[0183] In the formula, PREAMBLE_POWER_RAMPING_COUNTER is the third power ramping counter; PREAMBLE_POWER_RAMPING_STEP_1 is the first power ramping step; PREAMBLE_POWER_RAMPING_STEP_2 is the second power ramping step; POWER_OFFSET_2 is the third offset value; and POWER_OFFSET_1 is the fourth offset value.

[0184] The calculation formula of the third offset value is POWER OFFSET 2 = (PREAMBLE POWER RAMPING COUNTER 2 - 1) x (PREAMBLE POWER RAMPING STEP 2 - PREAMBLE POWER RAMPING STEP 1).

[0185] The calculation formula of the fourth offset value is POWER OFFSET 1 = (PREAMBLE POWER RAMPING COUNTER 2 - 1) x (PREAMBLE POWER RAMPING STEP 1 - PREAMBLE POWER RAMPING STEP 2).

[0186] In the formula, PREAMBLE POWER RAMPING COUNTER 2 is the fourth power ramping counter.

[0187] That is, the third offset value is determined based on the fourth power ramping counter, the first power ramping step and the second power ramping step; and the second offset value is determined based on the fourth power ramping counter, the first power ramping step and the second power ramping step.

[0188] For example, the third offset value is determined based on the product of a fifth difference value and a sixth difference value, the fifth difference value being the fourth power ramping counter minus 1, and the sixth difference value being the difference between the second power ramping step and the first power ramping step; and the fourth offset value is determined based on the product of a seventh difference value and an eighth difference value, the seventh difference value being the fourth power ramping counter minus 1, and the eighth difference value being the difference between the first power ramping step and the second power ramping step.

[0189] In other words, the received power of the random access channel is determined based on the third power ramping counter, the fourth power ramping counter, the first power ramping step and the second power ramping step.

[0190] The calculation of the third offset value and / or the fourth offset value and / or the use of the calculation formula of the received power of the random access channel can be flexibly set according to the channel interference caused by using different types of transmission opportunities, the delay requirement of the random access process, etc.

[0191] In some embodiments, the first reception power and / or the second reception power = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) x PREAMBLE_POWER_RAMPING_STEP_1 + POWER_OFFSET_2. Or, the first reception power and / or the second reception power = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER - 1) x PREAMBLE_POWER_RAMPING_STEP_2 + POWER_OFFSET_1.

[0192] In some embodiments, the first variable and the second variable further comprise a same or different random access preamble transmission counter; the third power ramping counter is incremented by 1 in case the value of the random access preamble transmission counter is greater than 1; the fourth power ramping counter is incremented by 1 in case the value of the random access preamble transmission counter is greater than 1 and the random access channel transmission corresponds to a transmission opportunity corresponding to the fourth power ramping counter, the transmission opportunity comprising a first type of transmission opportunity and a second type of transmission opportunity. In other words, the third power ramping counter is incremented by 1 in case the value of the random access preamble transmission counter included in the first variable and the second variable is greater than 1. The fourth power ramping counter is included in the first variable and is incremented by 1 in case the value of the random access preamble transmission counter included in the first variable is greater than 1 and the random access channel transmission corresponds to a first type of transmission opportunity; or, the fourth power ramping counter is included in the second variable and is incremented by 1 in case the value of the random access preamble transmission counter included in the second variable is greater than 1 and the random access channel transmission corresponds to a second type of transmission opportunity. In other words, when the (i-1)th transmission fails, the value of the random access preamble transmission counter is incremented by 1, and in the ith transmission, the third power ramping counter is incremented by 1 in case the value of the random access preamble transmission counter is greater than 1; the fourth power ramping counter is incremented by 1 in case the value of the random access preamble transmission counter is greater than 1 and the random access channel corresponds to a transmission opportunity corresponding to the fourth power ramping counter in the ith transmission, i being a positive integer.

[0193] In some embodiments, the calculation of the offset value is performed in each transmission, i.e., the offset value is updated each time the reception power is calculated.

[0194] Next, the first power ramping step is 2, the second power ramping step is 1, the other part of the received power is preambleReceivedTargetPower+DELTA_PREAMBLE, the initial value of the third offset value is 0, and the fourth power ramping counter is used to record the number of power ramping when the random access channel is transmitted in the second type of transmission opportunity. The offset value is calculated at each transmission. At the first transmission, since the first type of transmission opportunity is used, the final calculated received power of the first transmission is x, and the calculation parameters and results of the received power are shown in Table 4; at the second transmission, the first type of transmission opportunity is still used, the third power ramping counter is incremented by 1, the fourth power ramping counter remains the initial value 1, the calculated third offset value is still 0, and the final calculated received power of the second transmission is x+2; at the third transmission, the type of RO changes, the third power ramping counter is incremented by 1, and the fourth power ramping counter is also incremented by 1, the calculated third offset value is -1, and the calculated received power of the third transmission is x+3; at the fourth transmission, the third power ramping counter is incremented by 1, and the fourth power ramping counter is also incremented by 1, the calculated third offset value is -2, and the final calculated received power is x+4; at the fifth transmission, the second type of transmission opportunity is still used, the third power ramping counter is incremented by 1, and the fourth power ramping counter is also incremented by 1, the calculated third offset value is -3, and the final calculated received power is x+5.

[0195] Table 4. Calculation results of received power

[0196] It should be noted that when the type of RO is switched, the power ramping counter is incremented by 1 in the embodiment of the present application, but in actual implementation, the power ramping counter can also remain unchanged or be reset when the type of RO is switched, so as to better match the interference of different types of RO.

[0197] In summary, the method provided by the embodiments of the present application provides a new calculation method of received power by using offset value to calculate received power. In addition, the power ramping step is set for the first variable and the second variable respectively, so that different RO types correspond to different power ramping steps, which can more effectively perform interference management on different types of transmission opportunities. For example, the random access channel transmitted by the RO in the SBFD symbol can interfere with the downlink transmission, so the power ramping step can be set smaller to avoid interference with the downlink transmission in the same symbol. Moreover, the method uses two power ramping counters to implement, one is the same as the conventional counter and does not distinguish the RO type, and the other counter corresponds to one type of RO, so that the protocol change can be minimized and the standard impact is small, but the terminal implementation is complex.

[0198] The third calculation method of received power: sum product.

[0199] In some embodiments, the first variable further includes a first power ramping counter, and the second variable further includes a second power ramping counter, that is, the first power ramping counter is used to record the number of power ramping when the random access channel is transmitted in the first type of transmission opportunity, and the second power ramping counter is used to record the number of power ramping when the random access channel is transmitted in the second type of transmission opportunity. The calculation method of sum product is that the received power of this transmission is determined based on the first power ramping step, the first power ramping counter, the second power ramping step and the second power ramping counter, that is, the received power of the random access channel is determined based on the first power ramping step, the first power ramping counter, the second power ramping step and the second power ramping counter.

[0200] For example, the calculation formula of received power is as follows.

[0201] Received power = preambleReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_POWER_RAMPING_COUNTER_1 - 1) x PREAMBLE_POWER_RAMPING_STEP_1 + (PREAMBLE_POWER_RAMPING_COUNTER_2 - 1) x PREAMBLE_POWER_RAMPING_STEP_2.

[0202] In the formula, PREAMBLE_POWER_RAMPING_COUNTER_1 represents the first power ramping counter, PREAMBLE_POWER_RAMPING_COUNTER_2 represents the second power ramping counter, PREAMBLE_POWER_RAMPING_STEP_1 represents the first power ramping step, and PREAMBLE_POWER_RAMPING_STEP_2 represents the second power ramping step.

[0203] In some embodiments, the first variable and the second variable further comprise a same or different random access preamble transmission counter; in a case where the value of the random access preamble transmission counter is greater than 1 and the random access channel transmission corresponds to the first type of transmission opportunity, the value of the first power ramping counter is incremented by 1; in a case where the value of the random access preamble transmission counter is greater than 1 and the random access channel transmission corresponds to the second type of transmission opportunity, the value of the second power ramping counter is incremented by 1. In other words, in a case where the value of the random access preamble transmission counter included in the first variable is greater than 1 and the random access channel transmission corresponds to the first type of transmission opportunity, the value of the first power ramping counter is incremented by 1; in a case where the value of the random access preamble transmission counter included in the second variable is greater than 1 and the random access channel transmission corresponds to the second type of transmission opportunity, the value of the second power ramping counter is incremented by 1.

[0204] In other words, when the (i-1)th transmission fails, the value of the random access preamble transmission counter is incremented by 1. In the ith transmission, if the value of the random access preamble transmission counter is greater than 1 and the random access channel transmission corresponds to the first type of transmission opportunity, the value of the first power ramping counter is incremented by 1; or, in the ith transmission, if the value of the random access preamble transmission counter is greater than 1 and the random access channel transmission corresponds to the second type of transmission opportunity, the value of the second power ramping counter is incremented by 1, i being a positive integer.

[0205] Next, taking the first power ramping step as 2, the second power ramping step as 1, the other part of the received power preambleReceivedTargetPower+DELTA_PREAMBLE as x, (PREAMBLE_POWER_RAMPING_COUNTER_1-1) x PREAMBLE_POWER_RAMPING_STEP_1 as the first intermediate expression, and (PREAMBLE_POWER_RAMPING_COUNTER_2-1) x PREAMBLE_POWER_RAMPING_STEP_2 as the second intermediate expression as an example. In the first transmission, the first power ramping counter and the second power ramping counter are initialized as 1, and the final calculated received power of the first transmission is x. The calculation parameters and results of the received power are shown in Table 5. In the second transmission, the first type of transmission opportunity is still used, the first power ramping counter is incremented by 1, and the second power ramping counter remains unchanged as the initial value 1. The final calculated received power of the second transmission is x+2. In the third transmission, the type of RO used has changed, the first power ramping counter remains unchanged as 2, and the second power ramping counter is incremented by 1. The calculated received power of the third transmission is x+3. In the fourth transmission, the first power ramping counter remains unchanged as 2, and the second power ramping counter is incremented by 1. The calculated received power is x+4. In the fifth transmission, the second type of transmission opportunity is still used, the first power ramping counter remains unchanged as 2, and the second power ramping counter is incremented by 1. The calculated received power is x+5.

[0206] Table 5. Calculation results of received power

[0207] On the other hand, in addition to the power ramping step and the received power, the first variable and the second variable can also be set to have the same or different power levels, maximum number of random access preamble transmissions, and random access preamble transmission counters.

[0208] It should be noted that the calculation formula of the received power listed above only involves four variables, i.e., the power level, the preamble increment, the power ramping step, and the power ramping counter, but in actual use, other variables can also be added to the calculation formula of the received power according to actual needs. For example, in the case of a backoff mechanism related to a random access process, a variable of a power offset (POWER_OFFSET_2STEP_RA) can also be added to the calculation formula of the received power, where the POWER_OFFSET_2STEP_RA is a power offset existing when the power of a MsgA preamble is increased (which can also be referred to as a power boost), and is initialized to 0 dB. The MsgA is a process used by a terminal device to transmit a random access channel in a two-step random access, and is similar to the Msg1 in a four-step random access.

[0209] To sum up, the method provided by the embodiments of the present application provides a new calculation method of received power by using the product of the first variable and the second variable. In addition, the power ramping step is set for the first variable and the second variable respectively, so that different types of ROs correspond to different power ramping steps, which can more effectively manage interference on different types of transmission opportunities. For example, the random access channel transmitted on the RO in the SBFD symbol can interfere with the downlink transmission, so the power ramping step can be set to be smaller to avoid interference with the downlink transmission in the same symbol. Moreover, this method uses two power ramping counters to implement, which correspond to two types of ROs respectively, and the protocol design is simple, but the terminal implementation is complex.

[0210] For the two implementation methods of the terminal device selecting the first type of transmission opportunity or the second type of transmission opportunity to transmit the random access channel, especially the second implementation method of switching to the other type of transmission opportunity for transmission after using one type of transmission opportunity (the first type of transmission opportunity or the second type of transmission opportunity) for a certain number of times, related variables need to be set for the terminal device to support the terminal device to determine when to change the type of RO used.

[0211] The type of transmission opportunity used by the random access channel is determined based on the maximum number of random access preamble transmissions and the random access preamble transmission counter. The type of random access channel transmission opportunity includes a first type and a second type, the first type of random access channel transmission opportunity is the first type of transmission opportunity, and the second type of random access channel transmission opportunity is the second type of transmission opportunity.

[0212] Next, two judgment methods are shown.

[0213] Judgment method one: one random access preamble transmission counter.

[0214] In some embodiments, the first variable and the second variable comprise a same random access preamble transmission counter, the first variable and the second variable further comprise a first maximum transmission number, the first maximum transmission number being used to indicate a maximum transmission number of the random access channel; the first variable comprises a second maximum transmission number, the second maximum transmission number being used to indicate a maximum transmission number of the random access channel transmitted on the first type of transmission opportunity, or the second variable comprises a second maximum transmission number, the second maximum transmission number being used to indicate a maximum transmission number of the random access channel transmitted on the second type of transmission opportunity; the transmission opportunity type is determined based on at least one of the first maximum transmission number, the second maximum transmission number and the random access preamble transmission counter. Wherein the first variable and the second variable comprising a same random access preamble transmission counter means that there is only one random access preamble transmission counter in the terminal, or in other words, only one random access preamble transmission counter is enabled in the random access process.

[0215] Wherein, the random access channel transmission opportunity type can also be referred to as a transmission opportunity type, a type of RO, a type of RO, or other equivalent terms, and the embodiments of the present application do not limit this.

[0216] In addition, the first maximum transmission number is used to indicate a maximum transmission number of the random access channel, which is equivalent to the first maximum transmission number being used to indicate a maximum number of random access preamble transmissions performed before declaring a random access failure, and can also be said to be used to indicate a maximum number of random access channel transmissions performed before declaring a random access failure.

[0217] In some embodiments, the second variable comprises a second maximum transmission number, in a case where a value of the random access preamble transmission counter is less than the second maximum transmission number plus 1 and the value of the random access preamble transmission counter is less than the first maximum transmission number plus 1, the random access channel is sent in the second type of transmission opportunity; in a case where the value of the random access preamble transmission counter is greater than or equal to the second maximum transmission number plus 1 and the value of the random access preamble transmission counter is less than the first maximum transmission number plus 1, the random access channel is sent in the first type of transmission opportunity; in a case where the value of the random access preamble transmission counter is equal to the first maximum transmission number plus 1, a random access problem is reported, the random access problem being used to indicate that there is an abnormality in the random access process of the terminal device.

[0218] In some embodiments, the first variable includes a second maximum number of transmissions, the random access preamble transmission counter is incremented by one in a case that the value of the random access preamble transmission counter is less than the second maximum number of transmissions plus one and the value of the random access preamble transmission counter is less than the first maximum number of transmissions plus one, the random access channel is transmitted in the first type of transmission opportunity; the random access preamble transmission counter is incremented by one in a case that the value of the random access preamble transmission counter is greater than or equal to the second maximum number of transmissions plus one and the value of the random access preamble transmission counter is less than the first maximum number of transmissions plus one, the random access channel is transmitted in the second type of transmission opportunity; the random access problem is reported in a case that the value of the random access preamble transmission counter is equal to the first maximum number of transmissions plus one, the random access problem is used to indicate that the random access procedure of the terminal device is abnormal.

[0219] The value of the random access preamble transmission counter is incremented by one in a case that the i-th transmission of the random access channel corresponds to the first type of transmission opportunity; the value of the random access preamble transmission counter is incremented by one in a case that the i-th transmission of the random access channel corresponds to the second type of transmission opportunity.

[0220] In summary, the method provided by the embodiments of the present application can realize the switching of the initial transmission and retransmission of the random access channel between the two ROs, but the switching is conditional, for example, the switching to another RO after the use of one RO reaches a certain number of times.

[0221] The second judgment mode is two random access preamble transmission counters.

[0222] 1. The first type of transmission opportunity and the second type of transmission opportunity correspond to one random access preamble transmission counter respectively

[0223] In some embodiments, the first variable includes a third maximum number of transmissions and a first random access preamble transmission counter, the second variable includes a fourth maximum number of transmissions and a second random access preamble transmission counter, the third maximum number of transmissions is used to indicate the maximum number of transmissions of the random access channel in the first type of transmission opportunity, the fourth maximum number of transmissions is used to indicate the maximum number of transmissions of the random access channel in the second type of transmission opportunity; the type of transmission opportunity is determined based on at least one of the third maximum number of transmissions, the fourth maximum number of transmissions, the first random access preamble transmission counter and the second random access preamble transmission counter.

[0224] In some embodiments, the value of the first random access preamble transmission counter is incremented by one in a case that the i-th transmission of the random access channel fails and the i-th transmission of the random access channel corresponds to the first type of transmission opportunity; the value of the second random access preamble transmission counter is incremented by one in a case that the i-th transmission of the random access channel fails and the i-th transmission of the random access channel corresponds to the second type of transmission opportunity.

[0225] In a case where the value of the first random access preamble transmission counter is greater than or equal to the third maximum transmission number plus 1 and the value of the second random access preamble transmission counter is less than the fourth maximum transmission number plus 1, the i+1th transmission only uses the second type transmission opportunity; in a case where the value of the second random access preamble transmission counter is greater than or equal to the fourth maximum transmission number plus 1 and the value of the first random access preamble transmission counter is less than the third maximum transmission number plus 1, the i+1th transmission only uses the first type transmission opportunity.

[0226] In a case where the value of the first random access preamble transmission counter is equal to the third maximum transmission number plus 1 and the value of the second random access preamble transmission counter is equal to the fourth maximum transmission number plus 1, a random access problem is reported, and the random access problem is used to indicate that the random access process of the terminal device is abnormal. i is a positive integer.

[0227] Taking the third maximum transmission number as 2 and the fourth transmission number as 2 as an example, in the first transmission of the random access channel, the values of the first random access preamble transmission counter and the second random access preamble transmission counter are initialized as 1, in the case that the first transmission does not receive the RAR response of the network or does not successfully receive the conflict resolution message (i.e. the first transmission fails), and the first random access preamble transmission counter is less than the third maximum transmission number plus 1 and the random access channel corresponding to the first type transmission opportunity in this transmission, the first random access preamble transmission counter is incremented by 1; in the second transmission, the value of the first random access preamble transmission counter (2) is less than the third maximum transmission number plus 1, so the first type transmission opportunity (or the second type transmission opportunity) can be selected, assuming that the first type transmission opportunity is selected in the second transmission, in the case that the second transmission does not receive the RAR response of the network or does not successfully receive the conflict resolution message and the random access channel corresponding to the first type transmission opportunity in this transmission, the first random access preamble transmission counter is incremented by 1, and the first random access preamble transmission counter is 3 at this time; in the third transmission, the value of the first random access preamble transmission counter (3) is equal to the third maximum transmission number plus 1, and the value of the second random access preamble transmission counter is less than the fourth maximum transmission number plus 1, so the first type transmission opportunity cannot be selected in the subsequent transmission, and only the second type transmission opportunity can be used; therefore, the second type transmission opportunity will be used in the third transmission, in the case that the third transmission does not receive the RAR response of the network or does not successfully receive the conflict resolution message and the random access channel corresponding to the second type transmission opportunity in this transmission, the second random access preamble transmission counter is incremented by 1, and the second random access preamble transmission counter is 2; in the fourth transmission, the value of the second random access preamble transmission counter (2) is less than the fourth maximum transmission number plus 1, so the second type transmission opportunity can be used, in the case that the fourth transmission does not receive the RAR response of the network or does not successfully receive the conflict resolution message and the random access channel corresponding to the second type transmission opportunity in this transmission, the second random access preamble transmission counter is incremented by 1, and the second random access preamble transmission counter is 3 at this time; in the fifth transmission, the value of the first random access preamble transmission counter is equal to the third maximum transmission number plus 1, and the value of the second random access preamble transmission counter is equal to the fourth maximum transmission number plus 1, the random access problem is reported, and the random access process is ended.

[0228] It should be noted that, in actual transmission process, the transmission opportunity type can be freely selected and used, unless the preamble transmission counter corresponding to one transmission opportunity type has reached the maximum transmission number corresponding to the transmission opportunity type, and the preamble transmission counter corresponding to another transmission opportunity type is less than the maximum transmission number corresponding to the transmission opportunity type, in which case only the another transmission opportunity type can be used in subsequent transmission.

[0229] 2. One random access preamble transmission counter corresponds to the first type of transmission opportunity and the second type of transmission opportunity, and the other random access preamble transmission counter corresponds to the first type of transmission opportunity or the second type of transmission opportunity

[0230] In some embodiments, the first variable and the second variable include a fifth maximum transmission number and a third random access preamble transmission counter, the fifth maximum transmission number being used to indicate the maximum transmission number of the random access channel; the first variable includes a sixth maximum transmission number and a fourth random access preamble transmission counter, the sixth maximum transmission number being used to indicate the maximum transmission number of the random access channel transmitted on the first type of transmission opportunity, or the second variable includes a sixth maximum transmission number and a fourth random access preamble transmission counter, the sixth maximum transmission number being used to indicate the maximum transmission number of the random access channel transmitted on the second type of transmission opportunity; the transmission opportunity type is determined based on at least one of the fifth maximum transmission number, the sixth maximum transmission number, the third random access preamble transmission counter and the fourth random access preamble transmission counter.

[0231] Wherein, the third random access preamble transmission counter is used to indicate the number of times of transmission of the random access channel in the first type of transmission opportunity and the second type of transmission opportunity; the fourth random access preamble transmission counter is used to indicate the number of times of transmission of the random access channel in the first type of transmission opportunity or the second type of transmission opportunity.

[0232] In some embodiments, if the first variable includes the fourth random access preamble transmission counter, in the case of the i th transmission failure of the random access channel, the random access channel of the i th transmission corresponds to the first type of transmission opportunity, the value of the third random access preamble counter and the value of the fourth random access preamble counter are both increased by 1; in the case of the i th transmission failure of the random access channel, and the random access channel of the i th transmission corresponds to the second type of transmission opportunity, the value of the third random access preamble transmission counter is increased by 1.

[0233] In the case that the i-th transmission of the random access channel fails, the value of the fourth random access preamble transmission counter is greater than or equal to the sixth maximum transmission number plus 1, and the value of the third random access preamble transmission counter is less than the fifth maximum transmission number plus 1, the i+1-th transmission only uses the second type of transmission opportunity; in the case that the i-th transmission of the random access channel fails, and the value of the third random access preamble transmission counter is greater than or equal to the fifth maximum transmission number plus 1, a random access problem is reported, and the random access problem is used to indicate that the random access process of the terminal device is abnormal. Or, if the second variable includes the fourth random access preamble transmission counter, in the case that the i-th transmission of the random access channel fails, and the random access channel of the i-th transmission corresponds to the second type of transmission opportunity, the value of the third random access preamble counter and the value of the fourth random access preamble counter are both incremented by 1; in the case that the i-th transmission of the random access channel fails, and the random access channel of the i-th transmission corresponds to the first type of transmission opportunity, the value of the third random access preamble transmission counter is incremented by 1.

[0234] In the case that the i-th transmission of the random access channel fails, the value of the fourth random access preamble transmission counter is greater than or equal to the sixth maximum transmission number plus 1, and the value of the third random access preamble transmission counter is less than the fifth maximum transmission number plus 1, the i+1-th transmission only uses the first type of transmission opportunity; in the case that the i-th transmission of the random access channel fails, and the value of the third random access preamble transmission counter is greater than or equal to the fifth maximum transmission number plus 1, a random access problem is reported, and the random access problem is used to indicate that the random access process of the terminal device is abnormal.

[0235] In the case of the fifth maximum transmission number being 5, the sixth transmission number being 2, and the second variable including the fourth random access preamble transmission counter and the sixth transmission number, the third random access preamble transmission counter and the fourth random access preamble transmission counter are initialized to 1 at the first transmission of the random access channel, the third random access preamble transmission counter and the fourth random access preamble transmission counter are incremented by 1 in the case that the first transmission does not receive the RAR response of the network or does not successfully receive the conflict resolution message (i.e., the first transmission fails), and the random access channel of the current transmission corresponds to the second type of transmission opportunity. At the second transmission, the value of the fourth random access preamble transmission counter (2) is less than the sixth maximum transmission number plus 1, so the second type of transmission opportunity can be continued to be used (or the first type of transmission opportunity can be selected). Assuming that the second transmission continues to select the first type of transmission opportunity, the third random access preamble transmission counter and the fourth random access preamble transmission counter are incremented by 1 in the case that the second transmission does not receive the RAR response of the network or does not successfully receive the conflict resolution message, and the random access channel of the current transmission corresponds to the second type of transmission opportunity. At this time, the value of the fourth random access preamble transmission counter is 3. At the third transmission, the value of the fourth random access preamble transmission counter (3) is equal to the sixth maximum transmission number plus 1, and the third random access preamble transmission counter is less than the fifth maximum transmission number plus 1, so the second type of transmission opportunity cannot be selected in the subsequent transmission, and only the first type of transmission opportunity can be used. In the case that the third transmission does not receive the RAR response of the network or does not successfully receive the conflict resolution message, and the random access channel of the current transmission corresponds to the first type of transmission opportunity, the value of the third random access preamble transmission counter is incremented by 1, which is 4. At the fourth transmission, the first type of transmission opportunity is continued to be used. In the case that the fourth transmission does not receive the RAR response of the network or does not successfully receive the conflict resolution message, and the random access channel of the current transmission corresponds to the first type of transmission opportunity, the value of the third random access preamble transmission counter is incremented by 1, and the second random access preamble transmission counter is 5 at this time. At the fifth transmission, the first type of transmission opportunity is continued to be used. In the case that the fifth transmission does not receive the RAR response of the network or does not successfully receive the conflict resolution message, and the random access channel of the current transmission corresponds to the first type of transmission opportunity, the value of the third random access preamble transmission counter is incremented by 1, and the value of the third random access preamble transmission counter is 6 at this time. At the sixth transmission, the third random access preamble transmission counter is equal to the fifth maximum transmission number plus 1, the random access problem is reported, and the current random access process is ended.

[0236] It should be noted that, in the actual transmission process, the transmission opportunity type can be freely selected, unless the preamble transmission counter corresponding to one transmission opportunity type has reached the maximum number of transmissions corresponding to the transmission opportunity type, and the preamble transmission counter corresponding to another transmission opportunity type is less than the maximum number of transmissions corresponding to the transmission opportunity type, and only the other transmission opportunity type can be used in subsequent transmissions.

[0237] In summary, the method provided by the embodiments of the present application can realize free switching between the first RO and the second RO for PRACH initial transmission and retransmission, and does not require switching conditions. The method shown in 1 can separately control the maximum number of PRACH transmissions using the first type of RO and the second type of RO, which is more flexible but more complex in logic. The method shown in 2 can separately control the maximum number of PRACH transmissions using the first type of RO or the second type of RO, which has less impact on the standard and is less flexible than the method shown in 1.

[0238] In some embodiments, the two determination methods and the three calculation methods of received power can be combined. For example, the first calculation method is combined with the first determination method, and the terminal device includes one power ramping counter and one random access preamble transmission counter; or, the first calculation method is combined with the second determination method, and the terminal device includes one power ramping counter and two random access preamble transmission counters; or, the second calculation method is combined with the first determination method, and the terminal device includes one power ramping counter (or two power ramping counters) and one random access preamble transmission counter; or, the first calculation method is combined with the second determination method, and the terminal device includes one power ramping counter (or two power ramping counters) and two random access preamble transmission counters; or, the third calculation method is combined with the first determination method, and the terminal device includes two power ramping counters and one random access preamble transmission counter; or, the first calculation method is combined with the second determination method, and the terminal device includes two power ramping counters and two random access preamble transmission counters.

[0239] Finally, a configuration method of a random access channel is shown.

[0240] In the optional embodiment based on FIG. 4, as shown in FIG. 6, the method further includes:

[0241] Step 410: determining a first configuration and / or a second configuration, the first configuration and / or the second configuration being used to configure a first variable and / or a second variable of the random access channel.

[0242] The first configuration corresponds to the first type of transmission opportunity and the second configuration corresponds to the second type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration corresponds to the second type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity; or, the first configuration corresponds to the second type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity.

[0243] In some embodiments, the transmission opportunities corresponding to the first configuration and the second configuration depend on the calculation manner of the reception power adopted by the terminal. For example, for the first calculation manner of the reception power, the first configuration corresponds to the first type of transmission opportunity, and the second configuration corresponds to the second type of transmission opportunity. For the second calculation manner of the reception power, the first configuration can correspond to the first type of transmission opportunity, and the second configuration can correspond to the second type of transmission opportunity, or the first configuration can correspond to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration can correspond to the first type of transmission opportunity; or, the first configuration can correspond to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration can correspond to the second type of transmission opportunity; or, the first configuration can correspond to the first type of transmission opportunity, and the second configuration can correspond to the first type of transmission opportunity and the second type of transmission opportunity; or, the first configuration can correspond to the second type of transmission opportunity, and the second configuration can correspond to the first type of transmission opportunity and the second type of transmission opportunity. For the third calculation manner of the reception power, the first configuration can correspond to the first type of transmission opportunity, and the second configuration can correspond to the second type of transmission opportunity.

[0244] In some embodiments, any one of the first configuration and the second configuration includes at least one of the following variables: a power level; a maximum number of transmission times of a random access preamble; a power ramping step of a random access channel.

[0245] In some embodiments, the first configuration is determined based on a first configuration parameter, and the second configuration is determined based on a second configuration parameter; or, the first configuration is determined based on the first configuration parameter, and the second configuration is determined based on the first configuration parameter and a fifth offset value; or, the first configuration is determined based on the second configuration parameter and a sixth offset value, and the second configuration is determined based on the second configuration parameter. That is, the first variable includes the first configuration parameter and / or the second configuration parameter; and / or, the second variable includes the first configuration parameter and / or the second configuration parameter.

[0246] In some embodiments, the terminal device receives the first configuration parameter and the second configuration parameter; or, receives the first configuration parameter and the fifth offset value, the first configuration is determined based on the first configuration parameter, and the second configuration is determined based on the sum of the first configuration parameter and the fifth offset value; or, receives the second configuration parameter and the sixth offset value, the first configuration is determined based on the sum of the second configuration parameter and the sixth offset value, and the second configuration is determined based on the second configuration parameter.

[0247] In some embodiments, only variables with different values are included in the first configuration and the second configuration, wherein the variables with the same values in the first configuration and the second configuration can be additionally configured by the network device or agreed by the communication protocol; for example, the first power level is included in the first configuration, and the second power level is included in the second configuration, and the maximum transmission number of the random access preamble and the power ramping step of the random access channel are additionally configured by the network device or agreed by the communication protocol; or, the first power level and the first power ramping step are included in the first configuration, and the second power level and the second power ramping step are included in the second configuration, and the maximum transmission number of the random access preamble is additionally configured by the network device or agreed by the communication protocol; or, the first power level, the first maximum number are included in the first configuration, and the second power level and the second maximum number are included in the second configuration, and the power ramping step of the random access channel is additionally configured by the network device or agreed by the communication protocol; or, the first power level, the first maximum number and the first power ramping step are included in the first configuration, and the second power level, the second maximum number and the second power ramping step are included in the second configuration.

[0248] In some embodiments, all variables are included in the first configuration and the second configuration. That is, the first power level, the first maximum number and the first power ramping step are included in the first configuration, and the second power level, the second maximum number and the second power ramping step are included in the second configuration. The first maximum number and the second maximum number are the same or different, and the first power ramping step and the second power ramping step are the same or different.

[0249] In summary, the method provided by the embodiments of the present application, the terminal device determines the first configuration and the second configuration of the random access channel for random access, since the first configuration corresponds to the first type of transmission opportunity (and the second type of transmission opportunity), and the second configuration corresponds to the second type of transmission opportunity (and the first type of transmission opportunity); this enables the terminal device to select different configurations for different types of ROs in the random access process.

[0250] In the optional embodiment based on FIG. 5, as shown in FIG. 7, the method further includes:

[0251] Step 510: determining the first configuration and / or the second configuration, the first configuration and / or the second configuration being used to configure the first variable and / or the second variable of the random access channel.

[0252] The first configuration corresponds to the first type of transmission opportunity and the second configuration corresponds to the second type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration corresponds to the second type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity; or, the first configuration corresponds to the second type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity.

[0253] In some embodiments, the transmission opportunities corresponding to the first configuration and the second configuration depend on the calculation manner of the reception power adopted by the terminal. For the calculation manner one of the reception power, the first configuration corresponds to the first type of transmission opportunity, and the second configuration corresponds to the second type of transmission opportunity. For the calculation manner two of the reception power, the first configuration can correspond to the first type of transmission opportunity, and the second configuration corresponds to the second type of transmission opportunity, or, the first configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration corresponds to the second type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity; or, the first configuration corresponds to the second type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity. For the calculation manner three of the reception power, the first configuration can correspond to the first type of transmission opportunity, and the second configuration corresponds to the second type of transmission opportunity.

[0254] In some embodiments, any one of the first configuration and the second configuration includes at least one of the following variables: a power level; a maximum number of transmission times of a random access preamble; a power ramping step of a random access channel.

[0255] In some embodiments, the first configuration is determined based on a first configuration parameter, and the second configuration is determined based on a second configuration parameter; or, the first configuration is determined based on the first configuration parameter, and the second configuration is determined based on the first configuration parameter and a fifth offset value; or, the first configuration is determined based on the second configuration parameter and a sixth offset value, and the second configuration is determined based on the second configuration parameter. That is, the first variable includes the first configuration parameter and / or the second configuration parameter; and / or, the second variable includes the first configuration parameter and / or the second configuration parameter.

[0256] In some embodiments, the network device transmits the first configuration parameter and the second configuration parameter; or, transmits the first configuration parameter and the fifth offset value, the first configuration being determined based on the first configuration parameter, and the second configuration being determined based on the sum of the first configuration parameter and the fifth offset value; or, transmits the second configuration parameter and the sixth offset value, the first configuration being determined based on the sum of the second configuration parameter and the sixth offset value, and the second configuration being determined based on the second configuration parameter.

[0257] In some embodiments, only variables with different values are included in the first configuration and the second configuration, and variables with the same values in the first configuration and the second configuration can be additionally configured by the network device or agreed by a communication protocol; for example, the first power level is included in the first configuration, the second power level is included in the second configuration, and the maximum number of transmission times of the random access preamble and the power ramping step of the random access channel are additionally configured by the network device or agreed by a communication protocol; or, the first power level and the first power ramping step are included in the first configuration, the second power level and the second power ramping step are included in the second configuration, and the maximum number of transmission times of the random access preamble is additionally configured by the network device or agreed by a communication protocol; or, the first power level, the first maximum number of times are included in the first configuration, the second power level and the second maximum number of times are included in the second configuration, and the power ramping step of the random access channel is additionally configured by the network device or agreed by a communication protocol; or, the first power level, the first maximum number of times and the first power ramping step are included in the first configuration, and the second power level, the second maximum number of times and the second power ramping step are included in the second configuration.

[0258] In some embodiments, all variables are included in the first configuration and the second configuration. That is, the first power level, the first maximum number of times and the first power ramping step are included in the first configuration, and the second power level, the second maximum number of times and the second power ramping step are included in the second configuration. The first maximum number of times is the same as or different from the second maximum number of times, and the first power ramping step is the same as or different from the second power ramping step.

[0259] In summary, the method provided by the embodiments of the present application is that the network device determines the first configuration and the second configuration of the random access channel for random access. Since the first configuration corresponds to the first type of transmission opportunity (and the second type of transmission opportunity), and the second configuration corresponds to the second type of transmission opportunity (and the first type of transmission opportunity), the terminal device can select different configurations for different types of ROs in the random access process.

[0260] FIG. 8 shows a structural block diagram of a transmission device of a random access channel provided by an example embodiment of the present application. The device can be realized as a terminal device or a part of a terminal device by software or hardware or a combination of both, and the device includes:

[0261] The sending module 610 is configured to send the random access channel based on at least one of the first variable or the second variable.

[0262] The first variable is used for transmission of the random access channel in the first type of transmission opportunity, and the second variable is used for transmission of the random access channel in the second type of transmission opportunity. That is, the first variable is used when the random access channel is transmitted in the first type of transmission opportunity, and the second variable is used when the random access channel is transmitted in the second type of transmission opportunity.

[0263] The first type of transmission opportunity and the second type of transmission opportunity can be understood as transmission opportunities using two different duplex modes.

[0264] In some embodiments, the terminal device selects the first type of transmission opportunity or the second type of transmission opportunity to send the random access channel based on at least one of the first variable or the second variable, or the terminal device selects the first type of transmission opportunity or the second type of transmission opportunity and then sends the random access channel based on the first variable corresponding to the first type of transmission opportunity or the second variable corresponding to the second type of transmission opportunity. For example, the terminal device determines to select the first type of transmission opportunity to send the random access channel based on a first part of the first variable or the second variable, and a second part of the first variable is used to determine the variable in the transmission process of the random access channel. Or, the terminal device selects the first type of transmission opportunity and sends the random access channel based on the first variable, or the terminal device selects the second type of transmission opportunity and sends the random access channel based on the second variable.

[0265] In summary, the apparatus provided by the embodiments of the present application sets different variables for the first type of transmission opportunity and the second type of transmission opportunity, and determines the variable in the transmission process of the random access channel based on the first variable corresponding to the first type of transmission opportunity and the second variable corresponding to the second type of transmission opportunity, that is, the terminal device can determine the variable used for transmission under each type of random access channel transmission opportunity for different types of random access channel transmission opportunities, and send the random access channel according to the variable.

[0266] FIG. 9 shows a structural block diagram of a random access channel transmission apparatus provided by an example embodiment of the present application. The apparatus can be implemented as a network device or a part of a network device through software or hardware or a combination of both. The apparatus includes:

[0267] The receiving module 710 is configured to receive the random access channel, which is transmitted based on at least one of the first variable or the second variable.

[0268] The first variable is used for transmission of the random access channel in the first type of transmission opportunity, and the second variable is used for transmission of the random access channel in the second type of transmission opportunity. That is, the variable used by the random access channel when transmitting in the first type of transmission opportunity is the first variable, and the variable used by the random access channel when transmitting in the second type of transmission opportunity is the second variable.

[0269] The first type of transmission opportunity and the second type of transmission opportunity can be understood as transmission opportunities using two different duplex modes.

[0270] In some embodiments, the random access channel is transmitted by the terminal according to at least one of the first variable and the second variable, or the random access channel is transmitted by the terminal device according to the first type of transmission opportunity or the second type of transmission opportunity, and then according to the first variable corresponding to the first type of transmission opportunity or the second variable corresponding to the second type of transmission opportunity. For example, the terminal device determines to select the first type of transmission opportunity to transmit the random access channel according to a first part of the first variable and the second variable, and a second part of the first variable is used to determine the variable in the transmission process of the random access channel. Or, the terminal device selects the first type of transmission opportunity and transmits the random access channel according to the first variable, or the terminal selects the second type of transmission opportunity and transmits the random access channel according to the second variable.

[0271] In summary, the random access channel received by the device provided by the embodiments of the present application is transmitted by the terminal device based on the first variable corresponding to the first type of transmission opportunity and the second variable corresponding to the second type of transmission opportunity in the transmission process of the random access channel by setting different variables for the first type of transmission opportunity and the second type of transmission opportunity, that is, the random access channel received by the network device is transmitted by the terminal device according to the variable used for transmission in each type of random access channel transmission opportunity determined by the terminal device for different types of random access channel transmission opportunities.

[0272] In some embodiments, the specific description of the first type of transmission opportunity, the second type of transmission opportunity, the first variable, and the second variable is as described above in “1. First type of transmission opportunity”, “2. Second type of transmission opportunity”, and “3. First variable and second variable”, which will not be repeated here.

[0273] In some embodiments, a major factor affecting the transmission result of the random access channel in the random access procedure is the reception power. If the reception power of the random access channel is too small, the network is likely to fail to receive the random access channel transmitted by the terminal device, which can be regarded as a transmission failure of the random access channel. In the case of transmission failure determined by the terminal device, the reception power of the random access channel will be subjected to power climbing, and the random access channel will be transmitted again based on the climbed reception power until the transmission times reach the maximum transmission times. For terminal devices supporting the use of two types of transmission resources, the random access channel is usually transmitted using the two types of transmission resources in the random access procedure.

[0274] In a possible implementation, the terminal device randomly selects the first type of transmission opportunity and the second type of transmission opportunity at each transmission of the random access channel.

[0275] In another possible implementation, the terminal device can switch to the transmission opportunity of the other type after using the transmission opportunity of one type (the first type of transmission opportunity or the second type of transmission opportunity) for a certain number of times. For example, the terminal device switches to use the second type of transmission opportunity after transmitting the random access channel for n times using the first type of transmission opportunity. The transmission times of the first type of transmission opportunity and the second type of transmission opportunity are the same or different.

[0276] Regardless of which of the above two implementations is used, it is necessary to consider how to design the calculation method of the reception power of the random access channel, that is, to design the power control method of the random access channel.

[0277] The calculation method of the reception power is as follows:

[0278] The calculation method of the reception power is as follows:

[0279] The calculation method of the reception power is as follows:

[0280] For the reception power, the transmission of the random access channel can be attempted again with a higher reception power in the case of a failed transmission. The increase in the reception power (which can also be referred to as power ramping, power boosting, etc.) mainly involves two variables, a power ramping counter and a power ramping step. Therefore, the design can also be based on these two variables. First, a power ramping step is set for the first type of transmission opportunity and the second type of transmission opportunity, i.e., the first type of transmission opportunity corresponds to a first power ramping step, and the second type of transmission opportunity corresponds to a second power ramping step. It can also be understood that the first variable includes the first power ramping step, and the second variable includes the second power ramping step. Different types of transmission opportunities correspond to different power ramping steps, which can more effectively manage interference on different types of transmission opportunities. As for the second type of transmission opportunity located in the SBFD symbol, the random access channel transmitted on the transmission opportunity can interfere with the downlink transmission (such as the transmission using the downlink subband in the SBFD symbol), and therefore the power ramping step for the second type of transmission opportunity can be set to be smaller to avoid interference with the downlink transmission in the same symbol. It should be noted that the calculation method of the reception power provided in the embodiments of the present application is also applicable to the case where the first type of transmission opportunity and the second type of transmission opportunity correspond to the same power ramping step. The embodiments of the present application are exemplified by the case where the first type of transmission opportunity and the second type of transmission opportunity correspond to different power ramping steps, but the protection scope of the embodiments of the present application is not limited thereto.

[0281] At this time, the reception power of the random access channel is determined based on at least one of the first power ramping step and the second power ramping step, i.e., the reception power included in the first variable or the second variable is determined based on at least one of the first power ramping step and the second power ramping step. If the random access channel is transmitted in the first type of transmission opportunity, the reception power of the random access channel is the reception power in the first variable. If the random access channel is transmitted in the second type of transmission opportunity, the reception power of the random access channel is the reception power in the second variable.

[0282] Based on the first variable including the first power ramping step and the second variable including the second power ramping step, there are two design ideas. The first design idea is that the first type of transmission opportunity and the second type of transmission opportunity correspond to the same power ramping counter. The second design idea is that the first type of transmission opportunity and the second type of transmission opportunity correspond to a power ramping counter respectively (i.e., correspond to different power ramping counters).

[0283] The specific implementation processes of the first calculation mode of the received power, the second calculation mode of the received power and the third calculation mode of the received power are shown in the above contents corresponding to the bold titles, such as "the first calculation mode of the received power: accumulation", "the second calculation mode of the received power: calculation based on the offset value" and "the third calculation mode of the received power: sum product", which will not be repeated here.

[0284] In some embodiments, two implementation manners of selecting the first type of transmission opportunity or the second type of transmission opportunity for the terminal device to transmit the random access channel, especially the second implementation manner of switching to the transmission opportunity of another type for transmission after using the transmission opportunity of one type (the first type of transmission opportunity or the second type of transmission opportunity) for a certain number of times, needs to set related variables for the terminal device to support the terminal device to determine when to change the type of RO used.

[0285] The random access channel transmission opportunity type corresponding to the random access channel is determined based on the random access preamble transmission counter, and the random access channel transmission opportunity type includes a first type and a second type. The random access channel transmission opportunity of the first type is the first type of transmission opportunity, and the random access channel transmission opportunity of the second type is the second type of transmission opportunity.

[0286] The specific determination manners are shown in the above "determination manner one: one random access preamble transmission counter" and "determination manner two: two random access preamble transmission counters", which will not be repeated here.

[0287] In the optional embodiment based on FIG. 8, the apparatus further includes a first determination module.

[0288] The first determination module is configured to determine a first configuration and / or a second configuration, and the first configuration and / or the second configuration are used to configure a first variable and / or a second variable of the random access channel.

[0289] The first configuration corresponds to the first type of transmission opportunity, and the second configuration corresponds to the second type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration corresponds to the second type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity; or, the first configuration corresponds to the second type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity.

[0290] In some embodiments, the transmission opportunities corresponding to the first configuration and the second configuration depend on the calculation manner of the reception power employed by the terminal. For example, for the first calculation manner of the reception power, the first configuration corresponds to the first type of transmission opportunity, and the second configuration corresponds to the second type of transmission opportunity. For the second calculation manner of the reception power, the first configuration can correspond to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration can correspond to the first type of transmission opportunity; or, the first configuration can correspond to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration can correspond to the second type of transmission opportunity; or, the first configuration can correspond to the first type of transmission opportunity, and the second configuration can correspond to the first type of transmission opportunity and the second type of transmission opportunity; or, the first configuration can correspond to the second type of transmission opportunity, and the second configuration can correspond to the first type of transmission opportunity and the second type of transmission opportunity. For the third calculation manner of the reception power, the first configuration can correspond to the first type of transmission opportunity, and the second configuration can correspond to the second type of transmission opportunity.

[0291] In some embodiments, any one of the first configuration and the second configuration includes at least one of the following variables: a power level; a maximum number of transmission times of a random access preamble; a power ramping step of a random access channel.

[0292] In some embodiments, the first configuration is determined based on a first configuration parameter, and the second configuration is determined based on a second configuration parameter; or, the first configuration is determined based on a first configuration parameter, and the second configuration is determined based on the first configuration parameter and a fifth offset value; or, the first configuration is determined based on a second configuration parameter and a sixth offset value, and the second configuration is determined based on the second configuration parameter. That is, the first variable includes the first configuration parameter and / or the second configuration parameter; and / or, the second variable includes the first configuration parameter and / or the second configuration parameter.

[0293] In some embodiments, the terminal device receives the first configuration parameter and the second configuration parameter; or, receives the first configuration parameter and a fifth offset value, and the first configuration is determined based on the first configuration parameter, and the second configuration is determined based on a sum of the first configuration parameter and the fifth offset value; or, receives the second configuration parameter and a sixth offset value, and the first configuration is determined based on a sum of the second configuration parameter and the sixth offset value, and the second configuration is determined based on the second configuration parameter.

[0294] In some embodiments, only variables with different values are included in the first configuration and the second configuration, and variables with the same values in the first configuration and the second configuration can be additionally configured by the network device or agreed by the communication protocol; for example, the first power level is included in the first configuration, and the second power level is included in the second configuration, and the maximum number of transmission times of the random access preamble and the power ramping step of the random access channel are additionally configured by the network device or agreed by the communication protocol; or, the first power level and the first power ramping step are included in the first configuration, and the second power level and the second power ramping step are included in the second configuration, and the maximum number of transmission times of the random access preamble is additionally configured by the network device or agreed by the communication protocol; or, the first power level, the first maximum number of times are included in the first configuration, and the second power level and the second maximum number of times are included in the second configuration, and the power ramping step of the random access channel is additionally configured by the network device or agreed by the communication protocol; or, the first power level, the first maximum number of times, and the first power ramping step are included in the first configuration, and the second power level, the second maximum number of times, and the second power ramping step are included in the second configuration.

[0295] In some embodiments, all variables are included in the first configuration and the second configuration. That is, the first power level, the first maximum number of times, and the first power ramping step are included in the first configuration, and the second power level, the second maximum number of times, and the second power ramping step are included in the second configuration. The first maximum number of times is the same as or different from the second maximum number of times, and the first power ramping step is the same as or different from the second power ramping step.

[0296] In summary, the method provided by the embodiments of the present application enables the terminal device to determine the first configuration and the second configuration of the random access channel for random access, because the first configuration corresponds to the first type of transmission opportunity (and the second type of transmission opportunity), and the second configuration corresponds to the second type of transmission opportunity (and the first type of transmission opportunity); this enables the terminal device to select different configurations for different types of ROs in the random access process.

[0297] In the optional embodiment based on FIG. 9, the apparatus further includes a second determination module.

[0298] The second determination module is configured to determine the first configuration and / or the second configuration, and the first configuration and / or the second configuration is used to configure the first variable and / or the second variable of the random access channel.

[0299] The first configuration corresponds to the first type of transmission opportunity and the second configuration corresponds to the second type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration corresponds to the second type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity; or, the first configuration corresponds to the second type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity.

[0300] In some embodiments, the transmission opportunities corresponding to the first configuration and the second configuration depend on the calculation manner of the reception power adopted by the terminal. For the calculation manner one of the reception power, the first configuration corresponds to the first type of transmission opportunity and the second configuration corresponds to the second type of transmission opportunity. For the calculation manner two of the reception power, the first configuration can correspond to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity, and the second configuration corresponds to the second type of transmission opportunity; or, the first configuration corresponds to the first type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity; or, the first configuration corresponds to the second type of transmission opportunity, and the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity. For the calculation manner three of the reception power, the first configuration corresponds to the first type of transmission opportunity and the second configuration corresponds to the second type of transmission opportunity.

[0301] In some embodiments, any one of the first configuration and the second configuration includes at least one of the following variables: a power level; a maximum number of transmission times of a random access preamble; a power ramping step of a random access channel.

[0302] In some embodiments, the first configuration is determined based on a first configuration parameter, and the second configuration is determined based on a second configuration parameter; or, the first configuration is determined based on a first configuration parameter, and the second configuration is determined based on the first configuration parameter and a fifth offset value; or, the first configuration is determined based on a second configuration parameter and a sixth offset value, and the second configuration is determined based on the second configuration parameter. That is, the first variable includes the first configuration parameter and / or the second configuration parameter; and / or, the second variable includes the first configuration parameter and / or the second configuration parameter.

[0303] In some embodiments, the network device transmits the first configuration parameter and the second configuration parameter; or, transmits the first configuration parameter and the fifth offset value, the first configuration being determined based on the first configuration parameter, and the second configuration being determined based on the sum of the first configuration parameter and the fifth offset value; or, transmits the second configuration parameter and the sixth offset value, the first configuration being determined based on the sum of the second configuration parameter and the sixth offset value, and the second configuration being determined based on the second configuration parameter.

[0304] In some embodiments, only parameters with different values are included in the first configuration and the second configuration, wherein the variables with the same values in the first configuration and the second configuration can be additionally configured by the network device or agreed by the communication protocol; for example, the first power level is included in the first configuration, and the second power level is included in the second configuration, and the maximum number of transmission times of the random access preamble and the power ramping step of the random access channel are additionally configured by the network device or agreed by the communication protocol; or, the first power level and the first power ramping step are included in the first configuration, and the second power level and the second power ramping step are included in the second configuration, and the maximum number of transmission times of the random access preamble is additionally configured by the network device or agreed by the communication protocol; or, the first power level, the first maximum number of times are included in the first configuration, and the second power level and the second maximum number of times are included in the second configuration, and the power ramping step of the random access channel is additionally configured by the network device or agreed by the communication protocol; or, the first power level, the first maximum number of times and the first power ramping step are included in the first configuration, and the second power level, the second maximum number of times and the second power ramping step are included in the second configuration.

[0305] In some embodiments, all variables are included in the first configuration and the second configuration. That is, the first power level, the first maximum number of times and the first power ramping step are included in the first configuration, and the second power level, the second maximum number of times and the second power ramping step are included in the second configuration. The first maximum number of times and the second maximum number of times are the same or different, and the first power ramping step and the second power ramping step are the same or different.

[0306] In summary, the method provided by the embodiments of the present application is that the network device determines the first configuration and the second configuration of the random access channel for random access. Since the first configuration corresponds to the first type of transmission opportunity (and the second type of transmission opportunity), and the second configuration corresponds to the second type of transmission opportunity (and the first type of transmission opportunity), the terminal device can select different configurations for different types of ROs in the random access process.

[0307] It should be noted that: the apparatus provided by the above embodiments is only exemplified by the division of the above functional modules, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0308] For the apparatus in this embodiment, the specific manners in which various modules perform operations have been described in detail in the embodiments of the method, and thus will not be described in detail here.

[0309] Fig. 10 shows a structural schematic diagram of a terminal device provided in an example embodiment of the present application. The terminal device 800 can be used to perform the method steps performed by the terminal device in the above-described embodiments. The terminal device 800 can include a processor 801, a transceiver 802, and a memory 803. The processor 801 can be used to control sending and / or receiving. The transceiver 802 can be used to implement the functions of sending and / or receiving, such as the functions of at least one of the sending module 610 and the first determining module described above.

[0310] The processor 801 includes one or more processing cores. The processor 801 performs various functional applications and information processing by running software programs and modules.

[0311] The transceiver 802 can include a receiver and a transmitter, which can be implemented as the same wireless communication component, and the wireless communication component can include a wireless communication chip and a radio frequency antenna.

[0312] The memory 803 can be connected to the processor 801 and the transceiver 802.

[0313] The memory 803 can be used to store computer programs executed by the processor. The processor 801 is used to execute the computer programs to implement various steps in the above-described method embodiments.

[0314] In addition, the memory 803 can be implemented by any type of volatile or non-volatile storage devices or a combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable read-only memories, erasable programmable read-only memories, static random access memories, read-only memories, magnetic memories, flash memories, programmable read-only memories.

[0315] For details not described in this embodiment, refer to the above embodiments, which will not be described here.

[0316] Fig. 11 shows a structural schematic diagram of a network device provided in an example embodiment of the present application. The network device 900 can be used to perform the method steps performed by the network device in the above-described embodiments. The network device 900 can include a processor 901, a transceiver 902, and a memory 903. The processor 901 can be used to control sending and / or receiving. The transceiver 902 can be used to implement the functions of sending and / or receiving, such as the functions of at least one of the receiving module 710 and the second determining module described above.

[0317] The processor 901 includes one or more processing cores, and performs various function applications and information processing by running software programs and modules.

[0318] The transceiver 902 can include a receiver and a transmitter. For example, the transceiver 902 can include a wired communication component, which can include a wired communication chip and a wired interface (such as an optical fiber interface). Optionally, the transceiver 902 can also include a wireless communication component, which can include a wireless communication chip and a radio frequency antenna.

[0319] The memory 903 can be connected to the processor 901 and the transceiver 902.

[0320] The memory 903 can be used to store computer programs executed by the processor 901, and the processor 901 is configured to execute the computer programs to implement various steps performed by the network device in the above method embodiments.

[0321] In addition, the memory 903 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: a magnetic or optical disk, an electrically erasable programmable read-only memory, an erasable programmable read-only memory, a static random access memory, a read-only memory, a magnetic storage, a flash memory, and a programmable read-only memory.

[0322] For details not described in the present embodiment, refer to the above embodiments, which will not be repeated here.

[0323] The embodiments of the present application also provide a computer readable storage medium, which stores a computer program. The computer program is configured to be executed by a processor to implement the above transmission method of a random access channel. In some embodiments, the computer readable storage medium can include a ROM (Read-Only Memory), a RAM (Random-Access Memory), a SSD (Solid State Drives) or an optical disk, etc. Among them, the random access memory can include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

[0324] The embodiments of the present application also provide a chip, which includes a programmable logic circuit and / or program instructions. When the chip is running, it is used to implement the above transmission method of a random access channel.

[0325] The embodiment of the present application further provides a computer program product, which comprises a computer program stored in a computer readable storage medium, and a processor reads and executes the computer program from the computer readable storage medium to realize the transmission method of the random access channel.

[0326] It should be understood that the "indication" mentioned in the embodiments of the present application can be direct indication, or indirect indication, or can be an indication of an associated relationship. For example, A indicates B, which can mean that B can be obtained directly through A; or A indirectly indicates B, for example, A indicates C, and B can be obtained through C; or A and B have an associated relationship.

[0327] In the description of the embodiments of the present application, the term "corresponding" can mean a direct or indirect corresponding relationship between the two, or an associated relationship between the two, or an indication and being indicated, configuration and being configured, etc.

[0328] "Multiple" mentioned herein refers to two or more. "And / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents that the associated objects before and after it are in an "or" relationship.

[0329] "Greater than or equal to" mentioned herein can mean greater than or equal to, and "less than or equal to" can mean less than or equal to.

[0330] In addition, the step numbers described herein only exemplarily show a possible execution order between steps, and in some other embodiments, the above steps can also be executed in a sequence different from the numbers, such as simultaneously executing two steps with different numbers, or executing two steps with different numbers in an order opposite to the illustration, and the embodiments of the present application do not limit this.

[0331] Those skilled in the art should realize that in one or more of the above examples, the functions described in the embodiments of the present application can be realized by hardware, software, firmware or any combination thereof. When realized by 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. The computer readable medium includes a computer storage medium and a communication medium, wherein the communication medium includes any medium that facilitates the transmission of a computer program from one place to another. The storage medium can be any available medium that can be accessed by a general or special purpose computer.

[0332] The above merely illustrates the exemplary embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A transmission method of a random access channel, characterized by, The method is performed by a terminal device, and the method comprises: transmitting the random access channel based on at least one of a first variable and a second variable; wherein the first variable is used for transmission of the random access channel in a first type of transmission opportunity, and the second variable is used for transmission of the random access channel in a second type of transmission opportunity.

2. The method of claim 1, wherein, The first type of transmission opportunity is a non-sub-band non-overlapping full-duplex (SBFD) symbol associated random access channel transmission opportunity (RO), and the second type of transmission opportunity is an SBFD symbol associated RO.

3. The method according to claim 1 or 2, characterized in that, The first type of transmission opportunity comprises at least one of the following: an RO in a non-SBFD symbol; an RO in a flexible symbol; an RO configured in a first random access channel configuration, the first random access channel configuration being used for configuring cell-specific random access parameters.

4. The method according to any one of claims 1 to 3, characterized in that, The second type of transmission opportunity comprises at least one of the following: an RO in an SBFD symbol; an RO in an SBFD symbol configured as a downlink in uplink-downlink common configuration signaling; an RO configured in a second random access channel configuration, the second random access channel configuration being a configuration other than the first random access channel configuration.

5. The method according to any one of claims 1 to 4, characterized in that, The first variable and / or the second variable comprise at least one of the following variables: received power; power level; maximum number of transmissions of a random access preamble; power ramping step of the random access channel; power ramping counter; random access preamble transmission counter.

6. The method of claim 5, wherein, The first variable comprises a first power ramping step, and the second variable comprises a second power ramping step; received power of the random access channel is determined based on at least one of the first power ramping step and the second power ramping step.

7. The method of claim 6, wherein, The first variable and the second variable further comprise a same power ramping counter; in a case where an i+1th transmission of the random access channel corresponds to the first type of transmission opportunity, received power of the i+1th transmission of the random access channel is determined based on received power of an ith transmission and the first power ramping step, i being a positive integer; or, in a case where the i+1th transmission of the random access channel corresponds to the second type of transmission opportunity, received power of the i+1th transmission of the random access channel is determined based on the received power of the ith transmission and the second power ramping step; wherein the received power of the ith transmission of the random access channel is determined based on at least one of the first power ramping step and the second power ramping step and the power ramping counter.

8. The method of claim 6, wherein, The first variable and the second variable further comprise a same power ramping counter; received power of the random access channel is determined based on a first accumulated sum, the first accumulated sum being determined based on at least one of the first power ramping step and the second power ramping step and the power ramping counter.

9. The method of claim 8, wherein, The first accumulated sum is an accumulated sum of a first number of power ramping steps, the first number being determined based on the power ramping counter, and each of the first number of power ramping steps being one of the first power ramping step and the second power ramping step.

10. The method of claim 6, wherein, The first variable and the second variable further comprise a same power ramping counter; the reception power of the random access channel is determined based on the power ramping counter, the first power ramping step and a first offset value, the first offset value representing an offset value of power ramping of the second type of transmission opportunity relative to power ramping of the first type of transmission opportunity; or, the reception power of the random access channel is determined based on the power ramping counter, the second power ramping step and a second offset value, the second offset value representing an offset value of power ramping of the first type of transmission opportunity relative to power ramping of the first type of transmission opportunity.

11. The method of claim 10, wherein, The reception power of the random access channel is determined based on a first product and the first offset value, the first product being determined based on the power ramping counter and the first power ramping step; or, the reception power of the random access channel is determined based on a second product and the second offset value, the second product being determined based on the power ramping counter and the second power ramping step.

12. The method of claim 6, wherein, The first variable further comprises a first power ramping counter, and the second variable further comprises a second power ramping counter; the reception power of the random access channel is determined based on the first power ramping step, the first power ramping counter, the second power ramping step and the second power ramping counter.

13. The method of claim 12, wherein, The reception power of the random access channel is determined based on a first power ramping value and a second power ramping value, the first power ramping value being determined based on the first power ramping step and the first power ramping counter, and the second power ramping value being determined based on the second power ramping step and the second power ramping counter.

14. The method of claim 12, wherein, The first variable and the second variable further comprise a same or different random access preamble transmission counter; in a case that the random access preamble transmission counter is greater than 1 and the random access channel transmission corresponds to the first type of transmission opportunity, the first power ramping counter is incremented by 1, i being a positive integer; in a case that the random access preamble transmission counter is greater than 1 and the random access channel transmission corresponds to the second type of transmission opportunity, the second power ramping counter is incremented by 1.

15. The method of claim 6, wherein, The first variable and the second variable further comprise a third power ramping counter, and the first variable or the second variable further comprises a fourth power ramping counter; the reception power of the random access channel is determined based on the third power ramping counter, the first power ramping step and a third offset value, the third offset value representing an offset value of power ramping of the second type of transmission opportunity relative to power ramping of the first type of transmission opportunity; or, the reception power of the random access channel is determined based on the third power ramping counter, the second power ramping step and a fourth offset value, the fourth offset value representing an offset value of power ramping of the first type of transmission opportunity relative to power ramping of the first type of transmission opportunity.

16. The method of claim 15, wherein, The reception power of the random access channel is determined based on a third product and the third offset value, the third product being determined based on the third power ramping counter and the first power ramping step; or, the reception power of the random access channel is determined based on a fourth product and the fourth offset value, the fourth product being determined based on the third power ramping counter and the second power ramping step.

17. The method of claim 15, wherein, The first variable and the second variable further comprise a same or different random access preamble transmission counter; in a case that a value of the random access preamble transmission counter is greater than 1, a value of the third power ramping counter is added by 1; in a case that the value of the random access preamble transmission counter is greater than 1 and the random access channel transmission corresponds to a transmission opportunity type corresponding to the fourth power ramping counter, a value of the fourth power ramping counter is added by 1.

18. The method of any one of claims 1 to 17, wherein, The transmission opportunity type used by the random access channel is determined based on the maximum transmission number of the random access preamble and the random access preamble transmission counter.

19. The method of claim 18, wherein, The first variable and the second variable comprise a same random access preamble transmission counter, the first variable and the second variable further comprise a first maximum transmission number, the first maximum transmission number being used to indicate a maximum transmission number of the random access channel; the first variable comprises a second maximum transmission number, the second maximum transmission number being used to indicate a maximum transmission number of the random access channel transmitted on the first type of transmission opportunity, or the second variable comprises the second maximum transmission number, the second maximum transmission number being used to indicate a maximum transmission number of the random access channel transmitted on the second type of transmission opportunity. The transmission opportunity type is determined based on at least one of the first maximum transmission number, the second maximum transmission number and the random access preamble transmission counter.

20. The method of claim 18, wherein, The first variable comprises a third maximum transmission number and a first random access preamble transmission counter, the second variable comprises a fourth maximum transmission number and a second random access preamble transmission counter, the third maximum transmission number being used to indicate a maximum transmission number of the random access channel transmitted on the first type of transmission opportunity, the fourth maximum transmission number being used to indicate a maximum transmission number of the random access channel transmitted on the second type of transmission opportunity. The transmission opportunity type is determined based on at least one of the third maximum transmission number, the fourth maximum transmission number, the first random access preamble transmission counter and the second random access preamble transmission counter.

21. The method of claim 18, wherein, The first variable and the second variable include a fifth maximum transmission number and a third random access preamble transmission counter, the fifth maximum transmission number being used to indicate a maximum transmission number of the random access channel; the first variable includes a sixth maximum transmission number and a fourth random access preamble transmission counter, the sixth maximum transmission number being used to indicate a maximum transmission number of the random access channel transmitted in the first type of transmission opportunity, or the second variable includes the sixth maximum transmission number and the fourth random access preamble transmission counter, the sixth maximum transmission number being used to indicate a maximum transmission number of the random access channel transmitted in the second type of transmission opportunity. The transmission opportunity type is determined based on at least one of the fifth maximum transmission number, the sixth maximum transmission number, the third random access preamble transmission counter, and the fourth random access preamble transmission counter.

22. The method of any one of claims 1 to 21, wherein, The method further includes: determining a first configuration and / or a second configuration, the first configuration and / or the second configuration being used to configure the first variable and / or the second variable of the random access channel; wherein the first configuration corresponds to the first type of transmission opportunity, the second configuration corresponds to the second type of transmission opportunity; or the first configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity, the second configuration corresponds to the first type of transmission opportunity; or the first configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity, the second configuration corresponds to the second type of transmission opportunity; or the first configuration corresponds to the first type of transmission opportunity, the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity; or the first configuration corresponds to the second type of transmission opportunity, the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity.

23. The method of claim 22, wherein, Any one of the first configuration and the second configuration includes at least one of the following variables: a power level; a maximum transmission number of a random access preamble; a power ramping step of the random access channel.

24. The method of claim 22 or 23, wherein, The first configuration is determined based on a first configuration parameter, and the second configuration is determined based on a second configuration parameter; or the first configuration is determined based on the first configuration parameter, and the second configuration is determined based on the first configuration parameter and a fifth offset value; or the first configuration is determined based on the second configuration parameter and a sixth offset value, and the second configuration is determined based on the second configuration parameter.

25. A transmission method of a random access channel, characterized by, The method is performed by a network device, and the method includes: receiving the random access channel, the random access channel being transmitted based on at least one of a first variable and a second variable; wherein the first variable is used for transmission of the random access channel in a first type of transmission opportunity, and the second variable is used for transmission of the random access channel in a second type of transmission opportunity.

26. The method of claim 25, wherein, The first type of transmission opportunity is a non-sub-band non-overlapping full-duplex (SBFD) symbol associated random access channel transmission opportunity (RO), and the second type of transmission opportunity is an SBFD symbol associated RO.

27. The method of claim 25 or 26, wherein, The first type of transmission opportunity comprises at least one of: an RO in a non-SBFD symbol; an RO in a flexible symbol; an RO configured in a first random access channel configuration, the first random access channel configuration being configured for configuring cell-specific random access parameters.

28. The method of any one of claims 25 to 27, wherein, The second type of transmission opportunity comprises at least one of: an RO in an SBFD symbol; an RO in an SBFD symbol configured as downlink in uplink-downlink common configuration signaling; an RO configured in a second random access channel configuration, the second random access channel configuration being a configuration other than the first random access channel configuration.

29. The method of any one of claims 25 to 28, wherein, The first variable and / or the second variable comprises at least one of: a received power; a power level; a maximum number of transmission of a random access preamble; a power ramping step size of the random access channel; a power ramping counter; a random access preamble transmission counter.

30. The method of claim 29, wherein, The first variable comprises a first power ramping step size, and the second variable comprises a second power ramping step size; a received power of the random access channel is determined based on at least one of the first power ramping step size and the second power ramping step size.

31. The method of claim 30, wherein, The first variable and the second variable further comprise a same power ramping counter; in a case that an i+1th transmission of a random access channel corresponds to the first type of transmission opportunity, a received power of the i+1th transmission of the random access channel is determined based on a received power of an ith transmission and the first power ramping step size, i being a positive integer; or, in a case that the i+1th transmission of the random access channel corresponds to the second type of transmission opportunity, the received power of the i+1th transmission of the random access channel is determined based on the received power of the ith transmission and the second power ramping step size; wherein the received power of the ith transmission of the random access channel is determined based on at least one of the first power ramping step size and the second power ramping step size and the power ramping counter.

32. The method of claim 31, wherein, The first variable and the second variable further comprise a same power ramping counter; a received power of the random access channel is determined based on a first accumulated sum, the first accumulated sum being determined based on at least one of the first power ramping step size and the second power ramping step size and the power ramping counter.

33. The method of claim 32, wherein, The first accumulated sum is an accumulated sum of a first number of power ramping step sizes, the first number being determined based on the power ramping counter, each of the first number of power ramping step sizes being one of the first power ramping step size and the second power ramping step size.

34. The method of claim 30, wherein, The first variable and the second variable further comprise a same power ramping counter; the reception power of the random access channel is determined based on the power ramping counter, the first power ramping step and a first offset value, the first offset value representing an offset value of power ramping of the second type of transmission opportunity relative to power ramping of the first type of transmission opportunity; or, the reception power of the random access channel is determined based on the power ramping counter, the second power ramping step and a second offset value, the second offset value representing an offset value of power ramping of the first type of transmission opportunity relative to power ramping of the first type of transmission opportunity.

35. The method of claim 34, wherein, The reception power of the random access channel is determined based on a first product and the first offset value, the first product being determined based on the power ramping counter and the first power ramping step; or, the reception power of the random access channel is determined based on a second product and the second offset value, the second product being determined based on the power ramping counter and the second power ramping step.

36. The method of claim 30, wherein, The first variable further comprises a first power ramping counter, and the second variable further comprises a second power ramping counter; the reception power of the random access channel is determined based on the first power ramping step, the first power ramping counter, the second power ramping step and the second power ramping counter.

37. The method of claim 36, wherein, The reception power of the random access channel is determined based on a first power ramping value and a second power ramping value, the first power ramping value being determined based on the first power ramping step and the first power ramping counter, and the second power ramping value being determined based on the second power ramping step and the second power ramping counter.

38. The method of claim 36, wherein, The first variable and the second variable further comprise a same or different random access preamble transmission counter; in a case that the random access preamble transmission counter is greater than 1 and the random access channel transmission corresponds to the first type of transmission opportunity, the first power ramping counter is incremented by 1, i being a positive integer; in a case that the random access preamble transmission counter is greater than 1 and the random access channel transmission corresponds to the second type of transmission opportunity, the second power ramping counter is incremented by 1.

39. The method of claim 30, wherein, The first variable and the second variable further comprise a third power ramping counter, and the first variable or the second variable further comprises a fourth power ramping counter; the reception power of the random access channel is determined based on the third power ramping counter, the first power ramping step and a third offset value, the third offset value representing an offset value of power ramping of the second type of transmission opportunity relative to power ramping of the first type of transmission opportunity; or, the reception power of the random access channel is determined based on the third power ramping counter, the second power ramping step and a fourth offset value, the fourth offset value representing an offset value of power ramping of the first type of transmission opportunity relative to power ramping of the first type of transmission opportunity.

40. The method of claim 39, wherein, The reception power of the random access channel is determined based on a third product and the third offset value, the third product being determined based on the third power ramping counter and the first power ramping step; or, the reception power of the random access channel is determined based on a fourth product and the fourth offset value, the fourth product being determined based on the third power ramping counter and the second power ramping step.

41. The method of claim 39, wherein, The first variable and the second variable further comprise a same or different random access preamble transmission counter; in a case where a value of the random access preamble transmission counter is greater than 1, a value of the third power ramping counter is added by 1, i being a positive integer; in a case where the value of the random access preamble transmission counter is greater than 1 and the random access channel transmission corresponds to a transmission opportunity type corresponding to the fourth power ramping counter, a value of the fourth power ramping counter is added by 1.

42. The method of any one of claims 25 to 41, wherein, The transmission opportunity type used by the random access channel is determined based on the maximum transmission number of the random access preamble and the random access preamble transmission counter.

43. The method of claim 42, wherein, The first variable and the second variable comprise a same random access preamble transmission counter, the first variable and the second variable further comprise a first maximum transmission number, the first maximum transmission number being used to indicate a maximum transmission number of the random access channel; the first variable comprises a second maximum transmission number, the second maximum transmission number being used to indicate a maximum transmission number of the random access channel transmitted on the first type of transmission opportunity, or the second variable comprises the second maximum transmission number, the second maximum transmission number being used to indicate a maximum transmission number of the random access channel transmitted on the second type of transmission opportunity. The transmission opportunity type is determined based on at least one of the first maximum transmission number, the second maximum transmission number and the random access preamble transmission counter.

44. The method of claim 42, wherein, The first variable comprises a third maximum transmission number and a first random access preamble transmission counter, the second variable comprises a fourth maximum transmission number and a second random access preamble transmission counter, the third maximum transmission number being used to indicate a maximum transmission number of the random access channel transmitted on the first type of transmission opportunity, the fourth maximum transmission number being used to indicate a maximum transmission number of the random access channel transmitted on the second type of transmission opportunity. The transmission opportunity type is determined based on at least one of the third maximum transmission number, the fourth maximum transmission number, the first random access preamble transmission counter and the second random access preamble transmission counter.

45. The method of claim 42, wherein, The first variable and the second variable include a fifth maximum transmission number and a third random access preamble transmission counter, the fifth maximum transmission number being used to indicate a maximum transmission number of the random access channel; the first variable includes a sixth maximum transmission number and a fourth random access preamble transmission counter, the sixth maximum transmission number being used to indicate a maximum transmission number of the random access channel transmitted in the first type of transmission opportunity, or the second variable includes the sixth maximum transmission number and the fourth random access preamble transmission counter, the sixth maximum transmission number being used to indicate a maximum transmission number of the random access channel transmitted in the second type of transmission opportunity. The transmission opportunity type is determined based on at least one of the fifth maximum transmission number, the sixth maximum transmission number, the third random access preamble transmission counter and the fourth random access preamble transmission counter.

46. The method of any one of claims 25 to 45, wherein, The method further includes: determining a first configuration and / or a second configuration, the first configuration and / or the second configuration being used to configure the first variable and / or the second variable of the random access channel; wherein the first configuration corresponds to the first type of transmission opportunity, the second configuration corresponds to the second type of transmission opportunity; or the first configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity, the second configuration corresponds to the first type of transmission opportunity; or the first configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity, the second configuration corresponds to the second type of transmission opportunity; or the first configuration corresponds to the first type of transmission opportunity, the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity; or the first configuration corresponds to the second type of transmission opportunity, the second configuration corresponds to the first type of transmission opportunity and the second type of transmission opportunity.

47. The method of claim 46, wherein, Any one of the first configuration and the second configuration includes at least one of the following variables: a power level; a maximum transmission number of a random access preamble; a power ramping step of the random access channel.

48. The method of claim 46 or 47, wherein, The first configuration is determined based on a first configuration parameter, and the second configuration is determined based on a second configuration parameter; or the first configuration is determined based on the first configuration parameter, and the second configuration is determined based on the first configuration parameter and a fifth offset value; or the first configuration is determined based on the second configuration parameter and a sixth offset value, and the second configuration is determined based on the second configuration parameter.

49. A transmission apparatus of a random access channel, characterized by, The apparatus includes: a sending module, configured to send the random access channel based on at least one of a first variable and a second variable; wherein the first variable is used for transmission of the random access channel in a first type of transmission opportunity, and the second variable is used for transmission of the random access channel in a second type of transmission opportunity.

50. An apparatus for transmitting a random access channel, the apparatus comprising: The apparatus includes: The receiving module is configured to receive the random access channel, the random access channel being transmitted based on at least one of a first variable and a second variable; wherein the first variable is used for transmission of the random access channel in a first type of transmission opportunity, and the second variable is used for transmission of the random access channel in a second type of transmission opportunity.

51. A terminal device, comprising: The terminal device comprises: A processor, a transceiver connected to the processor, and a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the method for transmitting a random access channel according to any one of claims 1 to 24.

52. A network device, comprising: The network device comprises: A processor, a transceiver connected to the processor, and a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the method for transmitting a random access channel according to any one of claims 25 to 48.

53. A computer-readable storage medium, comprising: 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 method for transmitting a random access channel according to any one of claims 1 to 48.

54. A chip, comprising: The chip comprises programmable logic circuit and / or program instructions, and when the chip is running on a first node, the programmable logic circuit and / or program instructions are used to implement the method for transmitting a random access channel according to any one of claims 1 to 48.

55. A computer program product, characterised in that, The computer program product comprises computer instructions stored in a computer readable storage medium, and the processor obtains the computer instructions from the computer readable storage medium, and executes the computer instructions to implement the method for transmitting a random access channel according to any one of claims 1 to 48.

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