Method and apparatus for configuring random access channel, and device, medium and product

Abstract

The present application relates to the field of communications. Disclosed are a method and apparatus for configuring a random access channel, and a device, a medium and a product. The method comprises: receiving frequency start parameters configured by a network device, wherein the frequency start parameters are configured to determine a first offset between a first random access channel transmission opportunity and a first reference point, and / or are configured to determine a second offset between a second random access channel transmission opportunity and a second reference point; the first reference point corresponds to a first-type time-domain resource, and the second reference point corresponds to a second-type time-domain resource; alternatively, the first reference point corresponds to a first-type transmission opportunity, and the second reference point corresponds to a second-type transmission opportunity. The method provided in the present application interprets the frequency start parameters differently for the first-type time-domain resource and the second-type time-domain resource, making random access channel transmission opportunities valid on both the first-type time-domain resource and the second-type time-domain resource.

Description

Method, apparatus, device, medium and product for configuring random access channel TECHNICAL FIELD

[0001] The present application relates to the field of communication, in particular to a method, apparatus, device, medium and product for configuring 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 sending a random access channel, such as a frequency domain position, a number of random access channel transmission opportunities, etc.

[0003] However, due to the continuous design and 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 configuration method of the random access channel is a problem that needs to be solved at present.

[0004] SUMMARY

[0005] The present application provides a method, apparatus, device, medium and product for configuring random access channel, and the technical solution is as follows:

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

[0007] receiving a frequency start parameter configured by a network device, the frequency start parameter being used to determine a first offset between a first random access channel transmission opportunity and a first reference point, and / or being used to determine a second offset between a second random access channel transmission opportunity and a second reference point;

[0008] wherein the first reference point corresponds to a first type of time domain resource, and the second reference point corresponds to a second type of time domain resource; or, the first reference point corresponds to a first type of transmission opportunity, and the second reference point corresponds to a second type of transmission opportunity.

[0009] According to one aspect of the present application, a method for configuring a random access channel is provided, the method is executed by a terminal device, and the method comprises:

[0010] determining a number of repetitions applicable to the random access channel according to at least one parameter;

[0011] wherein the at least one parameter corresponds to at least one of a first type of time domain resource and a second type of time domain resource; or, the at least one parameter corresponds to at least one of a first type of transmission opportunity and a second type of transmission opportunity.

[0012] According to an aspect of the present application, a method for configuring a random access channel is provided, the method is performed by a network device, and the method comprises:

[0013] configuring a frequency starting parameter for the terminal device, the frequency starting parameter being used to determine a first offset between a first random access channel transmission opportunity and a first reference point, and / or being used to determine a second offset between a second random access channel transmission opportunity and a second reference point;

[0014] wherein the first reference point corresponds to a first type of time domain resource, and the second reference point corresponds to a second type of time domain resource; or the first reference point corresponds to a first type of transmission opportunity, and the second reference point corresponds to a second type of transmission opportunity.

[0015] According to an aspect of the present application, a method for configuring a random access channel is provided, the method is performed by a network device, and the method comprises:

[0016] sending a first configuration to a terminal device, the first configuration being used to indicate at least one parameter, the at least one parameter being used by the terminal device to determine a repetition number applicable to a random access channel;

[0017] wherein the at least one parameter corresponds to at least one of a first type of time domain resource and a second type of time domain resource; or the at least one parameter corresponds to at least one of a first type of transmission opportunity and a second type of transmission opportunity.

[0018] According to an aspect of the present application, a device for configuring a random access channel is provided, the device comprises:

[0019] a first receiving module, configured to receive a frequency starting parameter configured by a network device, the frequency starting parameter being used to determine a first offset between a first random access channel transmission opportunity and a first reference point, and / or being used to determine a second offset between a second random access channel transmission opportunity and a second reference point;

[0020] wherein the first reference point corresponds to a first type of time domain resource, and the second reference point corresponds to a second type of time domain resource; or the first reference point corresponds to a first type of transmission opportunity, and the second reference point corresponds to a second type of transmission opportunity.

[0021] According to an aspect of the present application, a device for configuring a random access channel is provided, the device comprises:

[0022] a determining module, configured to determine a repetition number applicable to a random access channel according to at least one parameter;

[0023] The at least one parameter corresponds to at least one of a first type of time domain resource and a second type of time domain resource; or, the at least one parameter corresponds to at least one of a first type of transmission opportunity and a second type of transmission opportunity.

[0024] According to an aspect of the present application, a configuration apparatus of a random access channel is provided, the apparatus comprising:

[0025] The first sending module is configured to configure a frequency starting parameter for the terminal device, the frequency starting parameter being used to determine a first offset between a first random access channel transmission opportunity and a first reference point, and / or being used to determine a second offset between a second random access channel transmission opportunity and a second reference point.

[0026] The first reference point corresponds to a first type of time domain resource, and the second reference point corresponds to a second type of time domain resource; or, the first reference point corresponds to a first type of transmission opportunity, and the second reference point corresponds to a second type of transmission opportunity.

[0027] According to an aspect of the present application, a configuration apparatus of a random access channel is provided, the apparatus comprising:

[0028] The second sending module is configured to send a first configuration to the terminal device, the first configuration being used to indicate at least one parameter, the at least one parameter being used by the terminal device to determine a repetition number applicable to a random access channel.

[0029] The at least one parameter corresponds to at least one of a first type of time domain resource and a second type of time domain resource; or, the at least one parameter corresponds to at least one of a first type of transmission opportunity and a second type of transmission opportunity.

[0030] According to an aspect of the present application, a terminal device is provided, the terminal device comprising:

[0031] A processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement a configuration method of a random access channel.

[0032] According to an aspect of the present application, a network device is provided, the network device comprising:

[0033] A processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement a configuration method of a random access channel.

[0034] According to an aspect of the present application, a computer readable storage medium is provided, wherein at least one program is stored in the computer readable storage medium, and the at least one program is loaded and executed by a processor to implement the method for configuring a random access channel.

[0035] According to an aspect of the present application, a chip is provided, wherein the chip comprises a programmable logic circuit and / or program instructions, and when the chip is running on a terminal device or a network device, the chip is configured to implement the method for configuring a random access channel.

[0036] According to an aspect of the present application, a computer program product is provided, wherein the computer program product comprises computer instructions, the computer instructions are stored in a computer readable storage medium, and a processor acquires the computer instructions from the computer readable storage medium, and the processor executes the computer instructions to implement the method for configuring a random access channel.

[0037] The technical scheme provided by the embodiments of the present application has at least the following beneficial effects:

[0038] The first type of time domain resource and the second type of time domain resource (or the first type of transmission opportunity and the second type of transmission opportunity) can share the same starting frequency parameter, which can save signaling overhead in the random access channel configuration process. At the same time of saving signaling overhead, the same starting frequency parameter corresponding to the first type of time domain resource and the second type of time domain resource is interpreted differently. Since 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, the different interpretation methods can make the random access channel transmission opportunity effective on the first type of time domain resource and the second type of time domain resource. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical scheme 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 effort.

[0040] FIG. 1 shows a schematic diagram of sub-band non-overlapping full duplex provided by the related art;

[0041] FIG. 2 shows a schematic diagram of PRACH frequency domain configuration provided by the related art;

[0042] FIG. 3 shows a schematic diagram of a mobile communication system provided by an exemplary embodiment of the present application;

[0043] FIG. 4 shows a schematic diagram of a configuration method of a random access channel transmission opportunity provided by the related art;

[0044] FIG. 5 shows a flow chart of a method for configuring a random access channel according to an example embodiment of the present application;

[0045] FIG. 6 shows a flow chart of a method for configuring a random access channel according to an example embodiment of the present application;

[0046] FIG. 7 shows a schematic diagram of a method for configuring a random access channel according to an example embodiment of the present application;

[0047] FIG. 8 shows a schematic diagram of a method for configuring a random access channel according to an example embodiment of the present application;

[0048] FIG. 9 shows a schematic diagram of a method for configuring a random access channel according to an example embodiment of the present application;

[0049] FIG. 10 shows a schematic diagram of a method for configuring a random access channel according to an example embodiment of the present application;

[0050] FIG. 11 shows a schematic diagram of a method for configuring a random access channel according to an example embodiment of the present application;

[0051] FIG. 12 shows a schematic diagram of a method for configuring a random access channel according to an example embodiment of the present application;

[0052] FIG. 13 shows a schematic diagram of a method for configuring a random access channel according to an example embodiment of the present application;

[0053] FIG. 14 shows a schematic diagram of a method for configuring a random access channel according to an example embodiment of the present application;

[0054] FIG. 15 shows a schematic diagram of a method for configuring a random access channel according to an example embodiment of the present application;

[0055] FIG. 16 shows a schematic diagram of a method for configuring a random access channel according to an example embodiment of the present application;

[0056] FIG. 17 shows a flow chart of a method for configuring a random access channel according to an example embodiment of the present application;

[0057] FIG. 18 shows a flow chart of a method for configuring a random access channel according to an example embodiment of the present application;

[0058] FIG. 19 shows a structural block diagram of a device for configuring a random access channel according to an example embodiment of the present application;

[0059] FIG. 20 shows a structural block diagram of a device for configuring a random access channel according to an example embodiment of the present application;

[0060] FIG. 21 shows a structural block diagram of a configuration device of a random access channel according to an example embodiment of the present application;

[0061] FIG. 22 shows a structural block diagram of a configuration device of a random access channel according to an example embodiment of the present application;

[0062] FIG. 23 shows a structural diagram of a terminal device according to an example embodiment of the present application;

[0063] FIG. 24 shows a structural diagram of a network device according to an example embodiment of the present application. DETAILED DESCRIPTION

[0064] For the purpose of the present application, the technical solutions and advantages will be more clearly understood, the following will be further described in detail with the help of the accompanying drawings. Here will be described in detail the example embodiments, which example is shown in the drawings. The following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The following example embodiments described in the embodiments are not representative of all embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present application, as detailed in the appended claims.

[0065] The terms used in the present application are merely for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a," "an," and "the" used in the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0066] It should be understood that although the terms first, second, third, etc. can be used in this application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another type of information. For example, without departing from the scope of the present application, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information. Depending on the context, the word "if" as used herein can be interpreted as "when" or "upon determination" or "in response to determining".

[0067] 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.

[0068] It should be understood that in some embodiments of the present application, "5G" can also be referred to as "5G NR" or "NR".

[0069] 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.

[0070] 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.

[0071] 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.

[0072] Next, sub-band non-overlapping full duplex (SBFD) is introduced:

[0073] 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.

[0074] 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.

[0075] Generally, SBFD operation meets the following points:

[0076] SBFD operates within a TDD carrier.

[0077] SBFD scheme design is within a single uplink / downlink BWP (Bandwidth Part) pair with aligned center frequency points.

[0078] • 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.

[0079] Next, the physical random access channel (PRACH) is introduced:

[0080] 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.

[0081] PRACH time domain resource configuration:

[0082] 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.

[0083] 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:

[0084] 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.

[0085] 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.

[0086] 3. Subframe / slot number: The subframe number or the slot number of the PRACH transmission occasion within a system frame; where on FR1, it indicates the subframe number, which is also the slot number of 15KHz slot; on FR2, it indicates the slot number in 60KHz slot.

[0087] 4. For short sequence, the number of PRACH slots in one subframe or one 60KHz slot is also configured, when the random access sequence is configured with 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.

[0088] 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.

[0089] PRACH frequency domain resource configuration:

[0090] In the frequency domain dimension, NR supports configuring 1, 2, 4 or 8 FDM (Frequency Division Multiplexing) PRACH resources, which is configured by the msg1-FDM parameter to expand the PRACH capacity, i.e., to determine the number of PRACH transmission occasions in the frequency domain dimension, i.e., to determine the number of PRACH resources in the frequency domain dimension, when the number of PRACH resources configured in the frequency domain dimension is more than 1, these PRACH resources are distributed continuously in the frequency domain dimension. The network device informs the terminal device of the starting PRB (Physical Resource Blocks) of the first PRACH transmission occasion in the frequency domain dimension relative to the starting PRB of the BWP through the related parameter msg1-FrequencyStart. For example, as shown in FIG. 2, the PRACH transmission occasion in the frequency domain dimension is selected by msg1-FDM and msg1-FrequencyStart.

[0091] Wherein, msg1-FDM is the number of frequency division multiplexed random access channel transmission occasions in a time unit; msg1-FrequencyStart is the offset of the lowest random access channel transmission occasion and PRB0 in the frequency domain dimension.

[0092] Random access channel transmission in SBFD symbol:

[0093] Currently, it is agreed in the protocol that RACH transmission is supported in SBFD symbol for RRC IDLE / INACTIVE / CONNECTED state, and two RACH configuration options are supported: Option 1, i.e. multiplexing the same set of RACH configuration for SBFD-aware UE and legacy UE, for example, using the RO configured in rach-ConfigCommon; Option 2, i.e. defining 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 (RO) will be 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).

[0094] PRACH repetition:

[0095] In order to improve the coverage of PRACH, a PRACH repetition mechanism is supported in the standard. PRACH can only be repeatedly sent in a set of PRACH transmission opportunities that meet certain conditions. The set of PRACH transmission opportunities needs to be continuous in the time domain, have the same frequency domain resources, and be associated with the same SSB (Synchronization Signal Block) index. The number of repetitions N of PRACH is determined jointly by the base station configuration and the measurement results of the terminal. Specifically, the base station configures the number of PRACH repetitions associated with the random access resource through high-layer signaling, and the terminal determines the number of repetitions used according to the comparison between the RSRP (Reference Signal Receiving Power) measured by the terminal according to the downlink loss reference signal and the threshold value configured by the base station.

[0096] wherein msg1-RepetitionNum is the number of repetitions of a random access channel. When the random access channel is configured, at least one of the following parameters can be included: rsrp-ThresholdMsg1-RepetitionNum2, rsrp-ThresholdMsg1-RepetitionNum4, rsrp-ThresholdMsg1-RepetitionNum8.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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).

[0106] 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 system, 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.

[0107] The mobile communication system provided by the embodiments of 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.

[0108] The frequency domain resource configuration and the repetition number configuration used in the related art have the following problems:

[0109] Frequency domain resource configuration problem: an example of using option 1 (i.e., a set of configurations is shared by SBFD symbols and non-SBFD symbols) for frequency domain configuration of PRACH is shown in FIG. 4, which shows five time slots, the first to third time slots are SBFD time slots configured as downlink, and the fourth and fifth time slots are uplink time slots and / or flexible time slots. If option 1 is used and the reference point represented by msg1-FrequencyStart in the configuration is the starting PRB (i.e., PRB0), in order to ensure that the RO is valid in the SBFD symbol, the frequency domain position of the RO is configured within the UL subband / UL usable PRB. This configuration can ensure that the legacy RO (RO in uplink symbols and flexible symbols) and the RO in the SBFD-D symbol are valid ROs for SBFD aware UEs (because they are completely within the UL resources of the SBFD-D symbol). However, this configuration has a problem that the RO in the uplink symbol and the flexible symbol is likely to be located in a position corresponding to the UL resources of the SBFD-D symbol in the frequency domain dimension, which will cause fragmentation of the uplink resources (e.g., the available uplink resources in the uplink symbol / flexible symbol are divided into two small uplink resources by the RO), i.e., this configuration causes the inability to schedule large uplink data packets to occupy the remaining uplink resources in the uplink symbol / flexible symbol.

[0110] Number of repetitions configuration problem: due to the gNB-to-gNB CLI (Cross Link Interference) problem in SBFD, and the different antenna / panel configurations in SBFD symbols and non-SBFD symbols, the PRACH detection performance results in SBFD symbols and non-SBFD symbols may be different, i.e., for the case where the same downlink path loss measurement results are obtained for SBFD symbols and non-SBFD symbols, if the base station is expected to correctly receive the PRACH in the SBFD symbol, the terminal device may need to use higher transmission power or more repetitions. However, too high transmission power may cause serious UE-to-UE CLI, so the transmission power of SBFD PRACH cannot be blindly increased. The CLI refers to the problem that due to flexible configuration of uplink and downlink by different base stations, at the same time, one neighboring cell may transmit downlink signals while the other neighboring cell transmits uplink signals, thereby causing interference between base stations and interference between UEs.

[0111] First, the terms involved in the embodiments of the present application are briefly introduced.

[0112] The first type of time domain resource and the second type of time domain resource (or the first type of transmission opportunity and the second type of transmission opportunity):

[0113] In some embodiments, the time domain resource includes at least one of the following: a symbol, a symbol group, a slot, a sub-slot, a frame, a subframe. The specific type of time domain resource in the embodiments of the present application is not limited.

[0114] Optionally, the first type of time domain resource is a non-SBFD type of time domain resource, and / or is an SBFD time domain resource configured as flexible; and the second type of time domain resource is an SBFD type of time domain resource, and / or is an SBFD time domain resource configured as downlink. For example, the first type of time domain resource is a non-SBFD symbol (i.e., a non-SBFD symbol), and the second type of time domain resource is an SBFD symbol; or, the first type of time domain resource is a non-SBFD slot, and the second type of time domain resource is an SBFD slot; and so on. The embodiments of the present application are not limited in this regard. Wherein, the SBFD symbol is a symbol including at least one of the uplink subband, the downlink subband, and the guard band, and the non-SBFD symbol is a symbol not including the above subbands. The second type of time domain resource described above is a type of time domain resource containing the uplink subband and / or the downlink subband.

[0115] The first type of transmission opportunity is the RO associated with the first type of time domain resource, and the second type of transmission opportunity is the RO associated with the second type of time domain resource. That is, the first type of transmission opportunity is the RO associated with the non-SBFD symbol, and the second type of transmission opportunity is the RO associated with the SBFD symbol; or, the first type of transmission opportunity is the RO associated with the non-SBFD slot, and the second type of transmission opportunity is the RO associated with the SBFD slot; and so on.

[0116] Wherein, the RO associated with the first type of time domain resource can be understood as the RO located within the first type of time domain resource, the RO in the first type of time domain resource, and so on; the second type of transmission opportunity is the same, the RO associated with the second type of time domain resource can be understood as the RO located within the second type of time domain resource, the RO in the second type of time domain resource, and so on; the RO associated with the non-SBFD symbol can be understood as the RO located within the non-SBFD symbol, the RO in the non-SBFD symbol, and so on; the RO associated with the SBFD symbol can be understood as the RO located within the SBFD symbol, the RO in the SBFD symbol, and so on.

[0117] 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, location, 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, location, size, and frequency domain bandwidth of the random access channels 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. Wherein, the SBFD symbol is a symbol including at least one of an uplink sub-band, a downlink sub-band, and a guard band, and the non-SBFD symbol is a symbol not including the above sub-bands.

[0118] In addition, the first type of time domain resource described above can also be referred to as a first type of time domain unit, and the second type of time domain resource can also be referred to as a second type of time domain unit, which is not limited in the embodiments of the present application.

[0119] I. Frequency domain configuration

[0120] FIG. 5 shows a flowchart of a configuration method of a random access channel provided by an example embodiment of the present application. The method is performed by a terminal device, which can be the terminal device shown in FIG. 3. The method includes:

[0121] Step 210: receiving a frequency start parameter configured by a network device, the frequency start parameter being used to determine a first offset between a first random access channel transmission opportunity and a first reference point, and / or being used to determine a second offset between a second random access channel transmission opportunity and a second reference point.

[0122] Wherein, the first reference point corresponds to the first type of time domain resource, and the second reference point corresponds to the second type of time domain resource; or the first reference point corresponds to the first type of transmission opportunity, and the second reference point corresponds to the second type of transmission opportunity.

[0123] In some embodiments, the frequency start parameter is msg1-FrequencyStart in the four-step random access process described above; or the frequency start parameter is msgA-RO-FrequencyStart (message A-random access channel transmission opportunity-frequency start) in the two-step random access process. The frequency start parameter can also be referred to as a start parameter, a frequency offset parameter, an offset parameter, a frequency domain start parameter, and other names, which are not limited in the embodiments of the present application.

[0124] In some embodiments, the first random access channel transmission opportunity and / or the second random access channel transmission opportunity is determined by the terminal device based on the frequency starting parameter configured by the network device. Alternatively, the terminal device determines at least one random access channel transmission opportunity based on the frequency starting parameter configured by the network device, and the at least one random access channel transmission opportunity includes the first random access channel transmission opportunity and / or the second random access channel transmission opportunity.

[0125] The frequency starting parameter is used to determine a first offset between the first random access channel transmission opportunity and a first reference point, and / or is used to determine a second offset between the second random access channel transmission opportunity and a second reference point. The first reference point corresponds to the first type of time domain resource or the first type of transmission opportunity, and the first offset corresponds to the first type of time domain resource or the first type of transmission opportunity. The second reference point corresponds to the second type of time domain resource or the second type of transmission opportunity, and the second offset corresponds to the second type of time domain resource or the second type of transmission opportunity.

[0126] In some embodiments, the first reference point and the second reference point are different, but the first offset and the second offset have the same or different values.

[0127] In summary, the method provided by the embodiments of the present application can share the same starting frequency parameter for the first type of time domain resource and the second type of time domain resource (or the first type of transmission opportunity and the second type of transmission opportunity), which can save signaling overhead in the random access channel configuration process. At the same time of saving signaling overhead, the same starting frequency parameter corresponding to the first type of time domain resource and the second type of time domain resource is interpreted differently. Since 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, the different interpretation methods can make the random access channel transmission opportunity effective in the first type of time domain resource and the second type of time domain resource.

[0128] FIG. 6 shows a flowchart of a random access channel configuration 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:

[0129] Step 310: configuring a frequency starting parameter for the terminal device, the frequency starting parameter being used to determine a first offset between the first random access channel transmission opportunity and a first reference point, and / or being used to determine a second offset between the second random access channel transmission opportunity and a second reference point.

[0130] The first reference point corresponds to the first type of time domain resource, and the second reference point corresponds to the second type of time domain resource; or the first reference point corresponds to the first type of transmission opportunity, and the second reference point corresponds to the second type of transmission opportunity.

[0131] In some embodiments, the frequency starting parameter is msg1-FrequencyStart in the four-step random access procedure shown above; or, the frequency starting parameter is msgA-RO-FrequencyStart (message A-random access channel transmission opportunity-frequency start) in the two-step random access procedure. The frequency starting parameter can also be referred to as a starting parameter, a frequency offset parameter, an offset parameter, a frequency domain starting parameter, and other names, which are not limited in the embodiments of the present application.

[0132] In some embodiments, the first random access channel transmission opportunity and / or the second random access channel transmission opportunity is determined by the terminal device based on the frequency starting parameter configured by the network device. Alternatively, the terminal device determines at least one random access channel transmission opportunity based on the frequency starting parameter configured by the network device, and the at least one random access channel transmission opportunity includes the first random access channel transmission opportunity and / or the second random access channel transmission opportunity.

[0133] The frequency starting parameter is used to determine a first offset between the first random access channel transmission opportunity and a first reference point, and / or the frequency starting parameter is used to determine a second offset between the second random access channel transmission opportunity and a second reference point. The first reference point corresponds to the first type of time domain resource or the first type of transmission opportunity, and the first offset corresponds to the first type of time domain resource or the first type of transmission opportunity; the second reference point corresponds to the second type of time domain resource or the second type of transmission opportunity, and the second offset corresponds to the second type of time domain resource or the second type of transmission opportunity.

[0134] In some embodiments, the first reference point and the second reference point are different, and the first offset and the second offset have the same or different values.

[0135] In summary, the method provided by the embodiments of the present application can share the same starting frequency parameter for the first type of time domain resource and the second type of time domain resource (or the first type of transmission opportunity and the second type of transmission opportunity), which can save the signaling overhead in the random access channel configuration process. At the same time of saving the signaling overhead, the same starting frequency parameter corresponding to the first type of time domain resource and the second type of time domain resource is interpreted differently. Since the number, position, size, frequency domain bandwidth, and the like of the available uplink resources in the first type of time domain resource and the second type of time domain resource are different, the different interpretation methods can make the random access channel transmission opportunity effective in the first type of time domain resource and the second type of time domain resource.

[0136] Next, the settings of the first reference point and the second reference point are briefly introduced.

[0137] It should be noted that the lowest PRB mentioned below is the PRB with the smallest PRB index, or can be understood as the PRB with the lowest frequency. The highest PRB is the PRB with the largest PRB index, or can be understood as the PRB with the highest frequency.

[0138] 1. The first reference point.

[0139] In some embodiments, the first reference point is the lowest PRB of the uplink BWP. That is, for the first type of time domain resource or the first type of transmission opportunity, the first reference point is the lowest PRB of the uplink BWP. The frequency start parameter is used to determine a first offset between the first random access channel and the lowest PRB of the uplink BWP. The first offset is the offset between the first random access channel transmission opportunity and the lowest PRB of the uplink BWP.

[0140] In some embodiments, the first reference point is the highest PRB of the uplink BWP. That is, for the first type of time domain resource or the first type of transmission opportunity, the first reference point is the highest PRB of the uplink BWP. The frequency start parameter is used to determine a first offset between the first random access channel and the highest PRB of the uplink BWP. The first offset is the offset between the first random access channel transmission opportunity and the highest PRB of the uplink BWP.

[0141] 2. The second reference point.

[0142] In some embodiments, the setting of the second reference point includes two ways, and the two setting ways of the second reference point are introduced as follows.

[0143] Setting way one: the second reference point is the lowest PRB of the first frequency domain bandwidth.

[0144] In some embodiments, for the second type of time domain resource or the second type of transmission opportunity, the second reference point is the lowest PRB of the first frequency domain bandwidth. The frequency start parameter is used to determine a second offset between the second random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth. The second offset is the offset between the second random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth.

[0145] Setting way two: the second reference point is the highest PRB of the first frequency domain bandwidth.

[0146] In some embodiments, for the second type of time domain resource or the second type of transmission opportunity, the second reference point is the highest PRB of the first frequency domain bandwidth. The frequency start parameter is used to determine a second offset between the second random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth. The second offset is the offset between the second random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth.

[0147] In some embodiments, the first offset and the second offset are the same or different.

[0148] In the case where the first offset and the second offset are the same, the first offset and the second offset are determined based on the frequency start parameter. For example, the first offset is equal to the frequency start parameter; the second offset is equal to the frequency start parameter. Or, the first offset is equal to the frequency start parameter plus a first constant; the second offset is equal to the frequency start parameter plus the first constant. Or, the first offset is equal to the product of the frequency start parameter and a second constant; the second offset is equal to the product of the frequency start parameter and the second constant. Wherein, the values of the first constant and the second constant can be set based on specific scenarios, the first constant and the second constant can be positive or negative, and the first constant and the second constant can be integers or decimals, and the embodiments of the present application do not limit them.

[0149] The first reference point is the lowest PRB of the uplink BWP, the second reference point is the lowest PRB of the first frequency domain bandwidth, the first offset is equal to the frequency start parameter, and the second offset is equal to the frequency start parameter. For example, as shown in FIG. 7, there are 5 time slots, the 1st to 3rd time slots are SBFD time slots configured as downlink (i.e., the second type of time domain resource), and the 4th and 5th time slots are uplink time slots and / or flexible time slots (i.e., the first type of time domain resource). At the same time, it is assumed that the first random access channel transmission opportunity and the second random access channel transmission opportunity are both the nearest random access channel transmission opportunity in the frequency domain. If the frequency start parameter (msg1-FrequencyStart) configured in the traditional RACH configuration is 0 and the frequency division multiplexing parameter (msg1-FDM) is 2, then there are two random access channel transmission opportunities in each time slot, and the offset between the random access channel transmission opportunity with the lower frequency domain position and the reference point (the first reference point or the second reference point) is 0. For example, in the 2nd time slot (SBFD time slot, i.e., the second type of time domain resource), there are random access channel transmission opportunity 10 and random access channel transmission opportunity 11, the frequency domain position of the random access channel transmission opportunity 10 is lower than that of the random access channel transmission opportunity 11, i.e., the random access channel transmission opportunity 10 is the second random access channel transmission opportunity, and the second offset between the second random access channel transmission opportunity and the second reference point (reference point 12 of the SBFD time slot) is equal to the frequency start parameter, which is equal to 0. In the 4th time slot (non-SBFD time slot, i.e., the first type of time domain resource), there are random access channel transmission opportunity 13 and random access channel transmission opportunity 14, the frequency domain position of the random access channel transmission opportunity 13 is lower than that of the random access channel transmission opportunity 14, i.e., the random access channel transmission opportunity 13 is the first random access channel transmission opportunity, and the first offset between the first random access channel transmission opportunity 14 and the first reference point (reference point 15 of the non-SBFD time slot) is equal to the frequency start parameter, which is equal to 0.

[0150] In the manner shown in FIG. 7, the same offset value (both equal to the frequency start parameter) is used for the first type of time domain resource and the second type of time domain resource (or, the first type of transmission opportunity and the second type of transmission opportunity), but the reference points for calculating the offset values are different for different types of time domain resources or transmission opportunities. Compared with the traditional manner shown in FIG. 4, this manner of interpreting different reference points for different types of time domain resources or transmission opportunities can to some extent avoid the problem of fragmentation of uplink resources in the uplink symbol / flexible symbol.

[0151] However, this manner of different interpretation of reference points is not applicable to all scenarios. For example, when the value of the frequency start parameter is large, a case as shown in FIG. 8 can occur. Although the random access channel transmission opportunity 17 in the fourth time slot (first type of time domain resource) is located in the uplink resource, the random access channel transmission opportunity 16 in the second time slot (second type of time domain resource) falls outside the uplink subband / available PRB, which can cause there to be no valid random access channel transmission opportunity in the first type of time domain resource, i.e., the terminal device cannot select a random access channel transmission opportunity in the first type of time domain resource for transmission in the random access process.

[0152] To solve this problem, embodiments of the present application propose that different offset values can be set for the first type of time domain resource and the second type of time domain resource (or, the first type of transmission opportunity and the second type of transmission opportunity). Next, how to set different offset values for the first type of time domain resource and the second type of time domain resource (or, the first type of transmission opportunity and the second type of transmission opportunity) in the case of sharing the same frequency start parameter is introduced.

[0153] 3. The first offset.

[0154] In some embodiments, for the first type of time domain resource or the first type of transmission opportunity, the first random access channel transmission opportunity is the lowest random access channel transmission opportunity in the frequency domain, and the first offset is determined based on the frequency start parameter. Optionally, the first offset is equal to the frequency start parameter.

[0155] For example, the first offset is equal to the frequency start parameter, i.e., the offset between the first random access channel transmission opportunity and the first reference point is equal to the frequency start parameter, i.e., the offset between the lowest random access channel transmission opportunity and the first reference point is equal to the frequency start parameter. Referring to the above “1. The first reference point”, the first reference point is the lowest PRB of the uplink BWP; that is, the first offset is the offset between the lowest random access channel transmission opportunity and the lowest PRB of the uplink BWP, and the frequency start parameter is equal to the offset between the lowest random access channel transmission opportunity and the lowest PRB of the uplink BWP.

[0156] In other words, for the first type of time domain resource or the first type of transmission opportunity, the frequency starting parameter is used to indicate the offset between the lowest random access channel transmission opportunity and the lowest PRB of the uplink BWP; or in other words, the frequency starting parameter is used to determine the offset between the lowest random access channel transmission opportunity and the lowest PRB of the uplink BWP.

[0157] To sum up, the method provided by the embodiments of the present application is because the first type of time domain resource or the first type of transmission opportunity is a non-SBFD type of time domain resource or transmission opportunity. That is, the first type of time domain resource or the second type of transmission opportunity is a traditional type of time domain resource or transmission opportunity. Therefore, by using the calculation method of the first offset shown in the related art, the standard is less changed from the perspective of the first offset.

[0158] 4. The second offset.

[0159] The second type of time domain resource is a SBFD type of time domain resource, and the second type of transmission opportunity is a SBFD type of transmission opportunity. For the second type of time domain resource or the second type of transmission opportunity, the valid RO needs to ensure that the RO falls within the first frequency domain bandwidth. Therefore, the following three calculation methods of the second offset are designed to avoid invalid ROs in the second type of time domain resource or the second type of transmission opportunity as much as possible.

[0160] Calculation method one: linear scaling.

[0161] In some embodiments, for the second type of time domain resource or the second type of transmission opportunity, the second random access channel transmission opportunity is the lowest random access channel transmission opportunity in the frequency domain, and the second offset is determined based on the frequency starting parameter and the first scaling factor.

[0162] By way of example but not limitation, the second offset is determined based on the frequency starting parameter and the first scaling factor. For example, the second offset is equal to the product of the frequency starting parameter and the first scaling factor, or the second offset is an integer value determined based on the product of the frequency starting parameter and the first scaling factor. For example, the second offset is the first product value, the first product value is the product of the frequency starting parameter and the first scaling factor; or the second offset is the value obtained by rounding down the first product value; or the second offset is the value obtained by rounding up the first product value; or the second offset is the value obtained by rounding the first product value; or the second offset of the random access channel transmission opportunity used by the terminal device when transmitting the random access channel relative to the second reference point is less than or equal to the offset determined based on the frequency starting parameter; or there is a value set including at least one offset, and the terminal device determines the offset of the random access channel transmission opportunity used relative to the second reference point from the value set, which is less than or equal to the maximum integer value of the offset determined based on the frequency starting parameter and the first scaling factor.

[0163] wherein the first scaling factor is determined based on at least one of a size of the first frequency domain bandwidth, a size of the uplink BWP, and a bandwidth size of a random access channel transmission opportunity (i.e., RO). For example, the first scaling factor is calculated as follows.

[0164] or, or, or, or, or, or, or,

[0165] wherein scaling factor represents the first scaling factor; represents a floor function; represents a ceiling function; and f(·) represents a rounding function.

[0166] In other words, the first scaling factor is a first ratio of the size of the first frequency domain bandwidth to the size of the uplink BWP; or, the first scaling factor is a value obtained by performing a floor operation on the first ratio; or, the first scaling factor is a value obtained by performing a ceiling operation on the first ratio; or, the first scaling factor is a value obtained by performing a rounding operation on the first ratio; or, the first scaling factor is a second ratio of a first difference to the size of the uplink BWP, the first difference being a difference between the size of the first frequency domain bandwidth and a bandwidth size of a random access channel transmission opportunity; or, the first scaling factor is a value obtained by performing a floor operation on the second ratio; or, the first scaling factor is a value obtained by performing a ceiling operation on the second ratio; or, the first scaling factor is a value obtained by performing a rounding operation on the second ratio.

[0167] In some embodiments, when the first scaling factor is an integer, the second offset is a product of the frequency starting parameter and the first scaling factor. When the first scaling factor is a decimal number (or a floating point number, a fraction, or the like), the second offset is an integer value determined based on a product of the frequency starting parameter and the first scaling factor, such as the second offset is a value obtained by rounding down the product of the frequency starting parameter and the first scaling factor; or, the second offset is a value obtained by rounding up the product of the frequency starting parameter and the first scaling factor; or, the second offset is a value obtained by rounding the product of the frequency starting parameter and the first scaling factor; or, the second offset of the random access channel transmission opportunity used by the terminal device when transmitting the random access channel with respect to the second reference point is less than or equal to an offset determined based on the frequency starting parameter; or, there is a value set including at least one offset, and the terminal device determines the offset of the random access channel transmission opportunity used with respect to the second reference point from the value set to be less than or equal to the maximum integer value of the offset determined based on the frequency starting parameter and the first scaling factor.

[0168] For example, as shown in FIG. 9, assuming that the size of the uplink BWP is 20 MHz and the size of the first frequency domain bandwidth is 10 MHz, the second reference point is set based on the first setting manner (i.e., the second reference point is the lowest PRB of the first frequency domain bandwidth). If the first scaling factor is the ratio of the size of the first frequency domain bandwidth to the size of the uplink BWP, i.e., the first scaling factor is 0.5. At this time, the offset of the random access channel transmission opportunity 18 (or referred to as the second type transmission opportunity 18) in the second type time domain resource with respect to the second reference point is a value obtained by rounding the product of the frequency starting parameter and the first scaling factor. The offset of the random access channel transmission opportunity 19 (or referred to as the first type transmission opportunity 19) in the first type time domain resource with respect to the first reference point is the frequency starting parameter. At this time, there is a certain offset between the random access channel transmission opportunity 19 in the first type time domain resource and the highest PRB in the uplink BWP corresponding to the first type time domain resource, i.e., the frequency starting parameter shown in FIG. 9 does not reach the maximum value. However, under the method shown in FIG. 9, when the frequency starting parameter reaches the maximum value, the random access channel transmission opportunity 18 in the second type time domain resource may fall outside the uplink sub-band, i.e., there is an invalid random access channel transmission opportunity in the second type time domain resource.

[0169] Therefore, a method as shown in FIG. 10 can be adopted, i.e., the above-mentioned method of the first scaling factor being the second ratio, the second ratio being the ratio of the first difference value and the size of the uplink BWP, and the first difference value being the difference between the size of the first frequency domain bandwidth and the bandwidth size of the random access channel transmission opportunity. Assuming that the bandwidth size of a random access channel transmission opportunity is 2 MHz, the first scaling factor is 0.4, i.e., the first scaling factor = (10-2) / 20. At this time, the offset of the random access channel transmission opportunity 20 in the second type of time domain resource (or the second type of transmission opportunity 20) relative to the second reference point is the value obtained after rounding the product of the frequency starting parameter and the first scaling factor. This method can ensure that the random access channel transmission opportunity in the first type of time domain resource (i.e., the first type of transmission opportunity) is valid, while the random access channel transmission opportunity in the second type of time domain resource (i.e., the second type of transmission opportunity) is also valid.

[0170] In summary, the method provided by the embodiments of the present application avoids the problem of uplink resource fragmentation when no re-interpretation is performed, and avoids the problem of invalid RO in the random access channel transmission opportunity in the second type of time domain resource (or the second type of transmission opportunity) when re-interpretation is performed. At the same time, the operation of multiplying the frequency starting parameter by a first scaling factor is a linear operation, which can achieve the following effects: as shown in FIG. 11, for the first type of time domain resource, the random access channel transmission opportunity 21 in the first type of time domain resource (i.e., the first type of transmission opportunity 21) is configured in the lower half of the uplink BWP, and then the random access channel transmission opportunity 22 in the second type of time domain resource (i.e., the second type of transmission opportunity 22) in the second type of time domain resource calculated by this method is also interpreted in the lower half of the uplink sub-band / uplink available PRB; similarly, as shown in FIG. 9, for the first type of time domain resource, if the random access channel transmission opportunity 19 in the first type of time domain resource (i.e., the first type of transmission opportunity 19) is configured in the upper half of the uplink BWP, then in the second type of time domain resource, the random access channel transmission opportunity 18 in the second type of time domain resource (i.e., the second type of transmission opportunity 18) is also interpreted in the upper half of the uplink sub-band / uplink available PRB.

[0171] The second calculation method: determining the lower bound.

[0172] In some embodiments, for the second type of time domain resource or the second type of transmission opportunity, the second random access channel transmission opportunity is the lowest random access channel transmission opportunity in the frequency domain, and the second offset is determined based on the frequency starting parameter. Optionally, the second offset is equal to the frequency starting parameter.

[0173] For example, the second offset is equal to the frequency starting parameter, i.e., the offset between the second random access channel transmission opportunity and the second reference point is equal to the frequency starting parameter, i.e., the offset between the lowest random access channel transmission opportunity and the second reference point is equal to the frequency starting parameter. Referring to the above-mentioned "2. The second reference point", the second reference point is the lowest PRB of the first frequency domain bandwidth, or the second reference point is the highest PRB of the first frequency domain bandwidth; that is, the second offset is the offset between the lowest random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth, and the frequency starting parameter is equal to the offset between the lowest random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth; or, the second offset is the offset between the lowest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth, and the frequency starting parameter is equal to the offset between the lowest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth.

[0174] In other words, for the second type of time domain resource or the second type of transmission opportunity, the frequency starting parameter is used to indicate the offset between the lowest random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth, or the frequency starting parameter is used to indicate the offset between the lowest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth; or, the frequency starting parameter is used to determine the offset between the lowest random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth, or the frequency starting parameter is used to determine the offset between the lowest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth.

[0175] For example, taking the lowest PRB of the first frequency domain bandwidth as the second reference point, as shown in FIG. 12, there are 5 time slots, and there are two random access channel transmission opportunities in the 2nd time slot, the second type of transmission opportunity 23 and the second type of transmission opportunity 24, wherein the second type of transmission opportunity 23 is lower than the second type of transmission opportunity 24 in the frequency domain, i.e., the second type of transmission opportunity 23 is the second random access channel transmission opportunity, i.e., the lowest random access channel transmission opportunity in the frequency domain, the second offset is equal to the frequency starting parameter, and the second offset is the offset between the second type of transmission opportunity 23 and the lowest PRB of the first frequency domain bandwidth. In this case, the random access channel transmission opportunities configured within the first frequency domain bandwidth and higher than the second type of transmission opportunity 23 (i.e., the second random access channel transmission opportunity) in the frequency domain are all valid.

[0176] To sum up, the method provided by the embodiments of the present application avoids the problem of uplink resource fragmentation when no re-interpretation is performed, and to some extent, avoids the problem that the RO falls completely outside the uplink sub-band / available PRB after re-interpretation, resulting in that the random access channel transmission opportunity (or second type transmission opportunity) in the second type time domain resource is invalid RO. At the same time, in the case of using the calculation method and the second reference point being the lowest PRB of the first frequency domain bandwidth, the valid RO can be found from the bottom up based on the second random access channel transmission opportunity.

[0177] Calculation method three: determine the upper bound.

[0178] In some embodiments, for the second type time domain resource or the second type transmission opportunity, the second random access channel transmission opportunity is the highest random access channel transmission opportunity in the frequency domain, and the second offset is determined based on the frequency start parameter and the size of the uplink BWP. Optionally, the second offset is equal to the difference between the size of the uplink BWP and the frequency start parameter, that is, the second offset is equal to the difference between the size of the uplink BWP and the frequency start parameter. Or, the second offset is equal to the second difference, and the second difference is the difference between the size of the uplink BWP and the frequency start parameter.

[0179] For example, the offset between the second random access channel transmission opportunity and the second reference point is equal to the second difference, that is, the offset between the highest random access channel transmission opportunity and the second reference point is equal to the second difference. Referring to the above-mentioned “2. Second reference point”, the second reference point is the lowest PRB of the first frequency domain bandwidth, or the second reference point is the highest PRB of the first frequency domain bandwidth; that is, the second offset is the offset between the highest random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth, which is equal to the second difference; or, the second offset is the offset between the highest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth, which is equal to the second difference.

[0180] In other words, for the second type time domain resource or the second type transmission opportunity, the frequency start parameter and the size of the uplink BWP are used to determine the offset between the highest random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth, or the frequency start parameter and the size of the uplink BWP are used to determine the offset between the highest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth.

[0181] Taking the highest PRB of the first frequency domain bandwidth as the second reference point as an example, as shown in FIG. 13, there are 5 time slots, and the frequency start parameter is greater than the size of the first frequency domain bandwidth. In this case, if the second reference point is interpreted as the lowest PRB of the uplink BWP, an invalid second type transmission opportunity 25 will be obtained; if the second reference point is interpreted as the lowest PRB of the first frequency domain bandwidth, an invalid second type transmission opportunity 26 will also be obtained. If the current calculation method three is used, the second reference point is interpreted as the highest PRB of the first frequency domain bandwidth, and the second random access channel transmission opportunity is the highest random access channel transmission opportunity in the frequency domain, the second type transmission opportunity 27 will be obtained. At this time, the second offset is equal to the second difference, that is, equal to the difference between the size of the uplink BWP and the frequency start parameter, which is the offset between the highest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth. That is, the random access channel transmission opportunities configured in the first frequency domain bandwidth and lower than the second type transmission opportunity 27 in the frequency domain are all valid.

[0182] It should be noted that the above example is based on the second random access channel transmission opportunity being the highest random access channel transmission opportunity, and the second offset being the offset between the lowest PRB of the highest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth. However, in fact, the second offset can also be the offset between the highest PRB of the highest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth. When the highest PRB of the highest random access channel transmission opportunity is used to confirm the second offset, the corresponding second random access channel transmission opportunity is shown as the second type transmission opportunity 28 in FIG. 13. At this time, the random access channel transmission opportunities configured in the first frequency domain bandwidth and lower than the second type transmission opportunity 28 in the frequency domain are all valid.

[0183] In summary, the method provided by the embodiments of the present application not only avoids the problem of uplink resource fragmentation when no re-interpretation is performed, but also avoids the problem of invalid random access channel transmission opportunities (or second type transmission opportunities) in the second type time domain resource when the RO falls completely outside the uplink sub-band / available PRB after re-interpretation. At the same time, in the case of using the calculation method and the second reference point being the highest PRB of the first frequency domain bandwidth, the effective RO can be found from top to bottom based on the second random access channel transmission opportunity.

[0184] In some embodiments, the above-mentioned calculation manner two and calculation manner three can be combined to implement, i.e., the terminal device determines whether to use the calculation manner two or the calculation manner three to determine the second offset according to actual conditions. For example, the terminal device determines the second random access channel transmission opportunity to be the lowest random access channel transmission opportunity in the frequency domain or the highest random access channel transmission opportunity in the frequency domain based on at least one of the configuration of the network device and the frequency start parameter; and / or, determines the second offset to be determined based on the frequency start parameter or determined based on the frequency start parameter and the size of the uplink BWP based on at least one of the configuration of the network device and the frequency start parameter; and / or, determines the second reference point to be the lowest PRB of the first frequency domain bandwidth or the highest PRB of the first frequency domain bandwidth based on at least one of the configuration of the network device and the frequency start parameter.

[0185] By way of example and not limitation, the configuration of the network device indicates that the terminal device adopts the manner corresponding to the calculation manner two in the calculation of the second offset, and the terminal device determines to use the calculation manner two based on the configuration of the network device, i.e., the terminal device can at least determine the second random access channel transmission opportunity to be the lowest random access channel transmission opportunity in the frequency domain, and the second offset is determined based on the frequency start parameter. Or, the protocol agreement or the network device configuration uses the calculation manner three when the frequency start parameter is greater than or equal to the size of the first frequency domain bandwidth, and uses the calculation manner two when the frequency start parameter is less than the size of the first frequency domain bandwidth; the terminal device selects to use the calculation manner two or the calculation manner three according to the size relationship between the size of the first frequency domain bandwidth and the frequency start parameter indicated in the configuration of the network device. Or, the protocol agreement or the network device configuration uses the calculation manner three when the frequency start parameter is greater than or equal to the first difference, and uses the calculation manner two when the frequency start parameter is less than the first difference; the terminal device selects to use the calculation manner two or the calculation manner three according to the size relationship between the size of the first frequency domain bandwidth and the frequency start parameter indicated in the configuration of the network device; the first difference is the difference between the size of the first frequency domain bandwidth and the bandwidth size of the random access channel transmission opportunity.

[0186] In some embodiments, the above-mentioned “1. first reference point”, “2. second reference point”, “3. first offset” and “4. second offset” have a correlation relationship, and in particular, the two setting manners shown in the above-mentioned “2. second reference point” can be combined with the three calculation manners shown in “4. second offset” to implement.

[0187] The setting manner one can be combined with the calculation manner one, that is, the second random access channel transmission opportunity is the lowest random access channel transmission opportunity in the frequency domain, the second reference point is the lowest PRB of the first frequency domain bandwidth, and the second offset between the lowest random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth is determined based on the frequency starting parameter and the first scaling factor; or, the setting manner one can be combined with the calculation manner two, that is, the second random access channel transmission opportunity is the lowest random access channel transmission opportunity in the frequency domain, the second reference point is the lowest PRB of the first frequency domain bandwidth, and the second offset between the lowest random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth is determined based on the frequency starting parameter; or, the setting manner two can be combined with the calculation manner three, that is, the second random access channel transmission opportunity is the highest random access channel transmission opportunity in the frequency domain, the second reference point is the highest PRB of the first frequency domain bandwidth, and the second offset between the highest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth is determined based on the frequency starting parameter and the size of the uplink BWP; or, the setting manner two can be combined with the calculation manner one, that is, the second random access channel transmission opportunity is the lowest random access channel transmission opportunity in the frequency domain, the second reference point is the highest PRB of the first frequency domain bandwidth, and the second offset between the lowest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth is determined based on the frequency starting parameter and the first scaling factor; or, the setting manner two can be combined with the calculation manner two, that is, the second random access channel transmission opportunity is the lowest random access channel transmission opportunity in the frequency domain, the second reference point is the highest PRB of the first frequency domain bandwidth, and the second offset between the lowest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth is determined based on the frequency starting parameter; or, the setting manner one can be combined with the calculation manner three, that is, the second random access channel transmission opportunity is the highest random access channel transmission opportunity in the frequency domain, the second reference point is the lowest PRB of the first frequency domain bandwidth, and the second offset between the highest random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth is determined based on the frequency starting parameter and the first scaling factor.

[0188] For the case that different first reference points and first offsets are adopted for the first type time domain resources (or first type transmission opportunities), and different second reference points and second offsets are adopted for the second type time domain resources (or second type transmission opportunities), there are also multiple combination manners.

[0189] For example, the first reference point is the lowest PRB of the uplink BWP, the first offset is determined based on the frequency starting parameter, the second reference point is the lowest PRB of the first frequency domain bandwidth (setting method one), and the second offset is determined based on the frequency starting parameter and the first scaling factor (calculation method one); or, the first reference point is the lowest PRB of the uplink BWP, the first offset is determined based on the frequency starting parameter, the second reference point is the lowest PRB of the first frequency domain bandwidth (setting method one), and the second offset is determined based on the frequency starting parameter (calculation method two); or, the first reference point is the lowest PRB of the uplink BWP, the first offset is determined based on the frequency starting parameter, the second reference point is the lowest PRB of the first frequency domain bandwidth (setting method one), and the second offset is determined based on the frequency starting parameter and the size of the uplink BWP (calculation method three); or, the first reference point is the lowest PRB of the uplink BWP, the first offset is determined based on the frequency starting parameter, the second reference point is the highest PRB of the first frequency domain bandwidth (setting method two), and the second offset is determined based on the frequency starting parameter and the first scaling factor (calculation method one); or, the first reference point is the lowest PRB of the uplink BWP, the first offset is determined based on the frequency starting parameter, the second reference point is the highest PRB of the first frequency domain bandwidth (setting method two), and the second offset is determined based on the frequency starting parameter (calculation method two); or, the first reference point is the lowest PRB of the uplink BWP, the first offset is determined based on the frequency starting parameter, the second reference point is the highest PRB of the first frequency domain bandwidth (setting method two), and the second offset is determined based on the frequency starting parameter and the size of the uplink BWP (calculation method three).

[0190] 5. Other parameters of the frequency domain configuration.

[0191] In some embodiments, other parameters in the frequency domain configuration of the random access channel can also refer to the above-mentioned methods shown to achieve two interpretation methods for one parameter for the first type of time domain resource and the second type of time domain resource in the case of using a set of configurations.

[0192] For example, the frequency domain configuration further includes a frequency division multiplexing parameter in addition to the frequency starting parameter.

[0193] In some embodiments, the terminal device receives the frequency division multiplexing parameter configured by the network device, and the frequency division multiplexing parameter is used to determine the number of frequency division multiplexed random access channel transmission opportunities in a time unit; wherein for the first type of time domain resource or the first type of transmission opportunity, the number is determined based on the frequency division multiplexing parameter; for the second type of time domain resource or the second type of transmission opportunity, the number is determined based on the frequency division multiplexing parameter and the first scaling factor.

[0194] In some embodiments, the network device sends a frequency division multiplexing parameter to the terminal device, the frequency division multiplexing parameter being used to determine a number of frequency division multiplexed random access channel transmission opportunities in a time unit; wherein for the first type of time domain resource or the first type of transmission opportunity, the number is determined based on the frequency division multiplexing parameter; and for the second type of time domain resource or the second type of transmission opportunity, the number is determined based on the frequency division multiplexing parameter and a first scaling factor.

[0195] By way of example and not limitation, the number of random access channel transmission opportunities is equal to the product of the frequency division multiplexing parameter and the first scaling factor; or, the number of random access channel transmission opportunities is an integer value determined based on the frequency division multiplexing parameter and the first scaling factor. That is, the number of random access channel transmission opportunities is a second product value, the second product value being the product of the frequency division multiplexing parameter and the first scaling factor; or, the number is the value after the second product value is rounded down; or, the number is the value after the second product value is rounded up; or, the number is the value after the second product value is rounded. Wherein the first scaling factor is determined based on at least one of the size of the first frequency domain bandwidth, the size of the uplink BWP, and the bandwidth size of the random access channel transmission opportunity. The calculation method of the first scaling factor is as shown in the calculation method shown in "4. Second offset", which will not be repeated here.

[0196] In some embodiments, the number of random access channel transmission opportunities used by the terminal device when transmitting the random access channel is less than or equal to the number determined based on the frequency division multiplexing parameter. Or, there is a value set including at least one number, and the terminal device determines the number of random access channel transmission opportunities used from the value set, which is less than or equal to the maximum integer value of the number determined based on the frequency division multiplexing parameter.

[0197] In summary, the method provided by the embodiments of the present application can share a set of configurations for the first type of time domain resource and the second type of time domain resource (or the first type of transmission opportunity and the second type of transmission opportunity), which can save signaling overhead in the random access channel configuration process. Different interpretation methods for the first type of time domain resource and the second type of time domain resource can support the use of different numbers of random access channel transmission opportunities for the random access channel on different types of time domain resources.

[0198] 6. The first frequency domain bandwidth.

[0199] In an optional embodiment, the first frequency domain bandwidth is a part of the available subband within the uplink BWP. The first frequency domain bandwidth is the actual available uplink bandwidth of the terminal device. The first frequency domain bandwidth includes at least one of the following:

[0200] · uplink subband;

[0201] • intersection of uplink subband and uplink BWP;

[0202] • available uplink PRB;

[0203] • uplink subband part within uplink BWP;

[0204] • available uplink subband part within uplink BWP;

[0205] • a segment of continuous uplink resources within uplink BWP;

[0206] • uplink BWP;

[0207] • actual subband;

[0208] • actual uplink subband, which is the intersection of uplink subband (also called nominal subband) and uplink BWP;

[0209] • actual uplink BWP, which is the intersection of uplink subband and uplink BWP;

[0210] • uplink subband part within uplink BWP in second type of time domain resource;

[0211] • available uplink subband part within uplink BWP in second type of time domain resource.

[0212] In some embodiments, the first frequency domain bandwidth is the intersection of a second frequency domain bandwidth and a third frequency domain bandwidth. The second frequency domain bandwidth is an active uplink bandwidth configured for the terminal device by the network device or the communication protocol; the third frequency domain bandwidth is an uplink subband in a current duplex mode or a type of time domain resource, which is usually determined by the relevant configuration of the cellular communication system. The intersection of the second frequency domain bandwidth and the third frequency domain bandwidth is the actual available uplink bandwidth of the terminal device, i.e., the first frequency domain bandwidth.

[0213] Wherein, the second frequency domain bandwidth can be referred to as any one of uplink BWP, uplink bandwidth, active uplink BWP, active BWP, active uplink bandwidth, etc. The third frequency domain bandwidth can be referred to as any one of subband, uplink subband, nominal uplink subband, uplink subband within frame structure, uplink subband within second type of time domain resource, etc. The second type of time domain resource is a type of time domain resource containing uplink subband and / or downlink subband. For example, the second type of time domain resource is at least one of SBFD symbol, SBFD slot, and SBFD subframe.

[0214] Taking the second frequency domain bandwidth as uplink BWP and the third frequency domain bandwidth as uplink subband, the first frequency domain bandwidth is the intersection of uplink subband and uplink BWP. Since there can be multiple possibilities for the positions of uplink BWP and uplink subband, exemplary representations are as follows:

[0215] As shown in FIG. 14, in some examples, the uplink sub-band completely falls into the uplink BWP, and the first frequency domain bandwidth is the frequency domain bandwidth corresponding to the uplink sub-band.

[0216] As shown in FIG. 15, in some embodiments, the uplink sub-band does not completely fall into the uplink BWP, and the first frequency domain bandwidth is the intersection of the uplink sub-band and the uplink BWP.

[0217] As shown in FIG. 16, in some embodiments, the uplink sub-band and the uplink BWP are completely the same, and the first frequency domain bandwidth is the frequency domain bandwidth corresponding to the uplink sub-band or the uplink BWP.

[0218] II. Repetition number configuration

[0219] The repeated sending of the random access channel can be divided into two cases: one is non-cross type repetition, and the other is cross type repetition. The non-cross type repetition refers to that the random access channels corresponding to the repeated sending have the same time domain resource type / transmission opportunity type, i.e., the repeated sending of the random access channel is all on the first type time domain resource, or the repeated sending of the random access channel is all on the first type transmission opportunity, or the repeated sending of the random access channel is all on the second type time domain resource, or the repeated sending of the random access channel is all on the second type transmission opportunity. The cross type repetition refers to that the random access channels corresponding to the repeated sending have different time domain resource types / transmission opportunity types, i.e., the repeated sending of the random access channel is on the first type time domain resource and the second type time domain resource, or the repeated sending of the random access channel is on the first type transmission opportunity and the second type transmission opportunity.

[0220] However, whether to support the repeated sending of the random access channel and how to design the number of repeated sending of the random access channel under the introduction of the SBFD technology is still under discussion. The present application shows a configuration and confirmation method of the number of repeated sending of the random access channel.

[0221] FIG. 17 shows a flowchart of a configuration method of a random access channel provided by an exemplary embodiment of the present application. The method is executed by a terminal device, which can be the terminal device shown in FIG. 3. The method comprises:

[0222] Step 410: determining the number of repeated sending of the random access channel according to at least one parameter.

[0223] The at least one parameter corresponds to at least one of the first type time domain resource and the second type time domain resource, or the at least one parameter corresponds to at least one of the first type transmission opportunity and the second type transmission opportunity.

[0224] In some embodiments, the number of repetitions applicable to the random access channel is a specific number or a set of numbers. For example, the number of repetitions applicable to the random access channel is 4; or, the number of repetitions applicable to the random access channel is {2, 4}.

[0225] In some embodiments, the terminal device receives at least one parameter sent by the network device; or, receives a first parameter and a first offset value sent by the network device, a second parameter is determined based on the first parameter and the first offset value; or, receives a second parameter and a second offset value sent by the network device, a first parameter is determined based on the second parameter and the second offset value; or, receives a first parameter, a third offset value and a fourth offset value sent by the network device, a second parameter is determined based on the first parameter and the third offset value, and a third parameter is determined based on the first parameter and the fourth offset value; or, receives a second parameter, a fifth offset value and a sixth offset value sent by the network device, a first parameter is determined based on the second parameter and the fifth offset value, and a third parameter is determined based on the second parameter and the sixth offset value; or, receives a third parameter, a seventh offset value and an eighth offset value sent by the network device, a first parameter is determined based on the third parameter and the seventh offset value, and a second parameter is determined based on the third parameter and the eighth offset value. Wherein, the first parameter corresponds to a first type of time domain resource or a first type of transmission opportunity; the second parameter corresponds to a second type of time domain resource or a second type of transmission opportunity.

[0226] In some embodiments, the first parameter, the second parameter and the third parameter satisfy an arithmetic sequence, then the three parameters can be indicated in the manner of one parameter and one offset value. For example, the terminal device receives a first parameter and an offset value, and the second parameter and the third parameter can be determined based on the first parameter and the offset value, the second parameter is the first parameter plus the offset value, and the third parameter is the first parameter plus a third product value, and the third product value is the product of the offset value and 2.

[0227] For example, in the case of at least one parameter including the following "2. Three parameters", i.e., the at least one parameter is a first parameter, a second parameter and a third parameter, the terminal device receives at least one parameter sent by the network device, or, receives a first parameter, a third offset value and a fourth offset value sent by the network device, or, receives a second parameter, a fifth offset value and a sixth offset value sent by the network device, or, receives a third parameter, a seventh offset value and an eighth offset value sent by the network device. Or, in the case of at least one parameter including the following "1. Two parameters", i.e., the at least one parameter is a first parameter and a second parameter, the terminal device receives a first parameter and an offset value sent by the network device, or, the terminal device receives a second parameter and an offset value sent by the network device.

[0228] In some embodiments, each of the at least one parameter comprises at least one of: a power threshold of the first number of repetitions; a power threshold of the second number of repetitions; a power threshold of the third number of repetitions. In a case that the at least one parameter is the first parameter and the second parameter, and the number of repetitions corresponding to each parameter is the same, the terminal device receives the first parameter and the offset value sent by the network device, or the terminal device receives the second parameter and the offset value sent by the network device. The number of repetitions corresponding to each parameter is the same, for example, the first parameter comprises a power threshold of the first number of repetitions and a power threshold of the second number of repetitions, and the second parameter also comprises a power threshold of the first number of repetitions and a power threshold of the second number of repetitions. Or, in a case that the number of repetitions corresponding to each parameter is different, the terminal device receives the at least one parameter sent by the network device. Or, in a case that there is a same number of repetitions and a different number of repetitions in the number of repetitions corresponding to each parameter, the terminal device receives the at least one parameter sent by the network device.

[0229] In summary, the method provided by the embodiments of the present application can achieve the purpose of similar coverage by respectively setting at least one parameter related to the number of repetitions corresponding to the first type of time domain resource and the second type of time domain resource (or the first type of transmission opportunity and the second type of transmission opportunity), and determining the applicable number of repetitions according to the single PRACH performance detection result detected by the first type of time domain resource and the second type of time domain resource, respectively.

[0230] FIG. 18 shows a flowchart of a configuration method of a random access channel 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 comprises:

[0231] Step 510: sending a first configuration to a terminal device, the first configuration being used to indicate at least one parameter, the at least one parameter being used by the terminal device to determine an applicable number of repetitions of a random access channel.

[0232] The at least one parameter corresponds to at least one of the first type of time domain resource and the second type of time domain resource; or, the at least one parameter corresponds to at least one of the first type of transmission opportunity and the second type of transmission opportunity.

[0233] In some embodiments, the applicable number of repetitions of the random access channel is a specific value or a set of values. For example, the applicable number of repetitions of the random access channel is 4; or, the applicable number of repetitions of the random access channel is {2, 4}.

[0234] In some embodiments, the sending the first configuration to the terminal device comprises: sending at least one parameter to the terminal device; or, sending a first parameter and a first offset value to the terminal device, a second parameter being determined based on the first parameter and the first offset value; or, sending a second parameter and a second offset value to the terminal device, the first parameter being determined based on the second parameter and the second offset value; or, sending a first parameter, a third offset value and a fourth offset value to the terminal device, a second parameter being determined based on the first parameter and the third offset value, a third parameter being determined based on the first parameter and the fourth offset value; or, sending a second parameter, a fifth offset value and a sixth offset value to the terminal device, the first parameter being determined based on the second parameter and the fifth offset value, the third parameter being determined based on the second parameter and the sixth offset value; or, sending a third parameter, a seventh offset value and an eighth offset value to the terminal device, the first parameter being determined based on the third parameter and the seventh offset value, the second parameter being determined based on the third parameter and the eighth offset value.

[0235] For example, in the case that the at least one parameter comprises the following “2. Three parameters”, i.e., the at least one parameter is a first parameter, a second parameter and a third parameter, the terminal device receives the at least one parameter sent by the network device, or, the terminal device receives a first parameter, a third offset value and a fourth offset value, or, the terminal device receives a second parameter, a fifth offset value and a sixth offset value, or, the terminal device receives a third parameter, a seventh offset value and an eighth offset value. Or, in the case that the at least one parameter comprises the following “1. Two parameters”, i.e., the at least one parameter is a first parameter and a second parameter, the terminal device receives a first parameter and an offset value sent by the network device, or, the terminal device receives a second parameter and an offset value sent by the network device.

[0236] In some embodiments, each of the at least one parameter comprises at least one of: a power threshold of a first repetition number; a power threshold of a second repetition number; a power threshold of a third repetition number. In the case that the at least one parameter is a first parameter and a second parameter, and each parameter corresponds to the same repetition number, the terminal device receives the first parameter and an offset value sent by the network device, or, the terminal device receives the second parameter and an offset value sent by the network device. Each parameter corresponds to the same repetition number, for example, the first parameter comprises a power threshold of a first repetition number and a power threshold of a second repetition number, and the second parameter also comprises a power threshold of a first repetition number and a power threshold of a second repetition number. Or, in the case that each parameter corresponds to different repetition numbers, the terminal device receives the at least one parameter sent by the network device. Or, in the case that there is a same repetition number and a different repetition number in each parameter corresponding to the repetition number, the terminal device receives the at least one parameter sent by the network device.

[0237] In summary, the method provided by the embodiments of the present application can achieve the purpose of similar coverage by setting at least one parameter related to the number of repetitions corresponding to the first type of time domain resource and the second type of time domain resource (or the first type of transmission opportunity and the second type of transmission opportunity) respectively, and determining the applicable number of repetitions according to the single PRACH performance detection results detected by the first type of time domain resource and the second type of time domain resource respectively.

[0238] In some embodiments, the number of repetitions applicable to the random access channel is determined by the terminal device according to the RSRP measured by the downlink loss reference signal and the threshold value configured by the network device. Optionally, the at least one parameter is the threshold value configured by the network device.

[0239] For example, each of the at least one parameter includes at least one of the following: a power threshold value of the first number of repetitions; a power threshold value of the second number of repetitions; and a power threshold value of the third number of repetitions. The first number of repetitions is greater than the second number of repetitions, and the second number of repetitions is greater than the third number of repetitions. Optionally, the power threshold value of the first number of repetitions is greater than the power threshold value of the second number of repetitions, and the power threshold value of the second number of repetitions is greater than the power threshold value of the third number of repetitions. It should be noted that in implementation, more or fewer power threshold values corresponding to the number of repetitions can also be designed according to specific scenarios, and the embodiments of the present application are not limited thereto.

[0240] By way of example but not limitation, the at least one parameter includes a first parameter and a second parameter. The first parameter includes a power threshold value of the first number of repetitions, a power threshold value of the second number of repetitions, and a power threshold value of the third number of repetitions. The second parameter includes a power threshold value of the second number of repetitions and a power threshold value of the third number of repetitions. However, the power threshold value of the first number of repetitions included in the first parameter and the power threshold value of the first number of repetitions included in the second parameter can be the same or different. That is, the power threshold value corresponding to the same number of repetitions included in each parameter can be the same or different.

[0241] For example, the power threshold value of the first number of repetitions is the parameter rsrp-ThresholdMsg1-RepetitionNum8, the power threshold value of the second number of repetitions is the parameter rsrp-ThresholdMsg1-RepetitionNum4, and the power threshold value of the third number of repetitions is the parameter rsrp-ThresholdMsg1-RepetitionNum2.

[0242] 1. Two parameters.

[0243] In some embodiments, the at least one parameter comprises a first parameter and a second parameter. The first parameter corresponds to the first type of time domain resource, and the second parameter corresponds to the second type of time domain resource; or, the first parameter corresponds to the first type of transmission opportunity, and the second parameter corresponds to the second type of transmission opportunity.

[0244] Firstly, the description is made for non-cross type repetition.

[0245] 1.1 Non-cross type repetition

[0246] In the case that the repetition of the random access channel is determined to be non-cross type repetition, if the random access channel transmission opportunity is repeatedly transmitted on the first type of time domain resource or the first type of transmission opportunity, the number of repetitions is determined based on the first parameter; or, if the random access channel is repeatedly transmitted on the second type of time domain resource or the second type of transmission opportunity, the number of repetitions is determined based on the second parameter. That is, the number of repetitions is determined according to the type of time domain resource or the type of transmission opportunity corresponding to the random access channel.

[0247] For example, the random access channel is determined to be repeatedly transmitted on the first type of time domain resource, the first parameter comprises a power threshold of the first number of repetitions and a power threshold of the second number of repetitions, and then the terminal device determines the number of repetitions applicable to the random access channel to be the first number of repetitions or the second number of repetitions according to the measured RSRP.

[0248] In some embodiments, if the random access channel is repeatedly transmitted on the first type of time domain resource or the first type of transmission opportunity; in the case that the first parameter includes a power threshold of the first number of repetitions, and the measured RSRP is lower than the power threshold of the first number of repetitions, the number of repetitions includes the first number of repetitions; in the case that the first parameter includes a power threshold of the second number of repetitions, and the measured RSRP is lower than the power threshold of the second number of repetitions, the number of repetitions includes the second number of repetitions; in the case that the first parameter includes a power threshold of the third number of repetitions, and the measured RSRP is lower than the power threshold of the third number of repetitions, the number of repetitions includes the third number of repetitions; in the case that the measured RSRP is not lower than any power threshold included in the first parameter, the number of repetitions is the minimum number of repetitions configured for the current BWP, the current BWP refers to the BWP in which the random access channel is transmitted, and the minimum number of repetitions is configured by the network device. And / or, if the random access channel is repeatedly transmitted on the second type of time domain resource or the second type of transmission opportunity; in the case that the second parameter includes a power threshold of the first number of repetitions, and the measured RSRP is lower than the power threshold of the first number of repetitions, the number of repetitions includes the first number of repetitions; in the case that the second parameter includes a power threshold of the second number of repetitions, and the measured RSRP is lower than the power threshold of the second number of repetitions, the number of repetitions includes the second number of repetitions; in the case that the second parameter includes a power threshold of the third number of repetitions, and the measured RSRP is lower than the power threshold of the third number of repetitions, the number of repetitions includes the third number of repetitions; in the case that the measured RSRP is not lower than any power threshold included in the second parameter, the number of repetitions is the minimum number of repetitions configured for the current BWP.

[0249] In some embodiments, in the case that the terminal device determines that the applicable number of repetitions includes multiple numbers of repetitions; for example, the first number of repetitions is 8, the second number of repetitions is 4, and the third number of repetitions is 2, the first parameter includes a power threshold of the first number of repetitions, a power threshold of the second number of repetitions, and a power threshold of the third number of repetitions, and the measured RSRP is lower than the power threshold of the first number of repetitions, also lower than the power threshold of the second number of repetitions, and also lower than the power threshold of the third number of repetitions, the terminal device finally determines that the applicable number of repetitions includes {2, 4, 8}. Optionally, the terminal device first uses a smaller number of repetitions for repeated transmission of the random access channel, for example, the terminal device first transmits according to the number of repetitions of 2, if n times of transmission are still unsuccessful, a larger number of repetitions is selected, for example, the number of repetitions of 4 is used for reattempt, until the maximum number of repetitions confirmed or the random access is successful.

[0250] Next, cross-type repetition is described.

[0251] 1.2 Cross-type repetition.

[0252] In a case that the repetition of the random access channel is determined as a cross-type repetition, i.e., if the random access channel is repeatedly transmitted on the first type time domain resource and the second type time domain resource, the repetition number is determined based on the time domain resource type corresponding to the first transmission of the random access channel; or, if the random access channel is repeatedly transmitted on the first type transmission opportunity and the second type transmission opportunity, the repetition number is determined based on the transmission opportunity type corresponding to the first transmission of the random access channel.

[0253] For example, if the first transmission corresponds to the first type time domain resource, the repetition number is determined based on the first parameter corresponding to the first type time domain resource; or, if the first transmission corresponds to the second type transmission opportunity, the repetition number is determined based on the second parameter corresponding to the second type transmission opportunity.

[0254] In some embodiments, the repetition number comprises the first repetition number in a case that the first parameter comprises a power threshold of the first repetition number, the measured RSRP is lower than the power threshold of the first repetition number in the first parameter, and the first transmission of the random access channel corresponds to the first type of time domain resource or the first type of transmission opportunity; the repetition number comprises the second repetition number in a case that the first parameter comprises a power threshold of the second repetition number, the measured RSRP is lower than the power threshold of the second repetition number in the first parameter, and the first transmission of the random access channel corresponds to the first type of time domain resource or the first type of transmission opportunity; the repetition number comprises the third repetition number in a case that the first parameter comprises a power threshold of the third repetition number, the measured RSRP is lower than the power threshold of the third repetition number in the first parameter, and the first transmission of the random access channel corresponds to the first type of time domain resource or the first type of transmission opportunity; the repetition number is a minimum repetition number configured for a current BWP in a case that the first transmission of the random access channel corresponds to the first type of time domain resource or the first type of transmission opportunity, and the measured RSRP is not lower than any power threshold comprised in the first parameter, the current BWP being a BWP in which the random access channel is transmitted, and the minimum repetition number being configured by the network device; the repetition number comprises the first repetition number in a case that the second parameter comprises a power threshold of the first repetition number, the measured RSRP is lower than the power threshold of the first repetition number in the second parameter, and the first transmission of the random access channel corresponds to the second type of time domain resource or the second type of transmission opportunity; the repetition number comprises the second repetition number in a case that the second parameter comprises a power threshold of the second repetition number, the measured RSRP is lower than the power threshold of the second repetition number in the second parameter, and the first transmission of the random access channel corresponds to the second type of time domain resource or the second type of transmission opportunity; the repetition number comprises the third repetition number in a case that the second parameter comprises a power threshold of the third repetition number, the measured RSRP is lower than the power threshold of the third repetition number in the second parameter, and the first transmission of the random access channel corresponds to the second type of time domain resource or the second type of transmission opportunity; and the repetition number is a minimum repetition number configured for a current BWP in a case that the first transmission of the random access channel corresponds to the second type of time domain resource or the second type of transmission opportunity, and the measured RSRP is not lower than any power threshold comprised in the second parameter.

[0255] 2. three parameters.

[0256] In some embodiments, the at least one parameter further comprises a third parameter in addition to the first parameter and the second parameter. The first parameter corresponds to the first type of time domain resource, the second parameter corresponds to the second type of time domain resource, and the third parameter corresponds to the first type of time domain resource and the second type of time domain resource; or, the first parameter corresponds to the first type of transmission opportunity, the second parameter corresponds to the second type of transmission opportunity, and the third parameter corresponds to the first type of transmission opportunity and the second type of transmission opportunity.

[0257] Firstly, the non-cross-type repetition is described.

[0258] 2.1 Non-cross-type repetition

[0259] In a case where it is determined that the repeated sending of the random access channel is non-cross-type repetition, if the random access channel transmission opportunity is repeatedly sent on the first type of time domain resource or the first type of transmission opportunity, the number of repetitions is determined based on the first parameter; or, if the random access channel is repeatedly sent on the second type of time domain resource or the second type of transmission opportunity, the number of repetitions is determined based on the second parameter. That is, the number of repetitions is determined according to the type of time domain resource or the type of transmission opportunity corresponding to the random access channel.

[0260] It should be noted that the non-cross-type repetition designed based on the three parameters is basically the same as the above-mentioned “1.1 Non-cross-type repetition” designed based on the two parameters, and the specific content can be referred to the above-mentioned “1.1 Non-cross-type repetition”.

[0261] 2.2 Cross-type repetition

[0262] In a case where it is determined that the repeated sending of the random access channel is non-cross-type repetition, that is, if the random access channel is repeatedly sent on the first type of time domain resource and the second type of time domain resource, the number of repetitions is determined based on the third parameter; or, if the random access channel is repeatedly sent on the first type of transmission opportunity and the second type of transmission opportunity, the number of repetitions is determined based on the third parameter.

[0263] In some embodiments, in a case where the third parameter includes a power threshold of a first number of repetitions, and the measured RSRP is lower than the power threshold of the first number of repetitions in the third parameter, the number of repetitions includes the first number of repetitions; in a case where the third parameter includes a power threshold of a second number of repetitions, and the measured RSRP is lower than the power threshold of the second number of repetitions in the third parameter, the number of repetitions includes the second number of repetitions; in a case where the third parameter includes a power threshold of a third number of repetitions, and the measured RSRP is lower than the power threshold of the third number of repetitions in the third parameter, the number of repetitions includes the third number of repetitions; in a case where the measured RSRP is not lower than any power threshold included in the third parameter, the number of repetitions is the minimum number of repetitions configured for the current BWP, the current BWP refers to the BWP in which the random access channel is transmitted, and the minimum number of repetitions is configured by the network device.

[0264] Next, a configuration device of a random access channel is shown.

[0265] I. Frequency domain configuration

[0266] FIG. 19 shows a structural block diagram of a configuration 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 comprises:

[0267] The first receiving module 610 is configured to receive a frequency start parameter configured by a network device, the frequency start parameter being used to determine a first offset between a first random access channel transmission opportunity and a first reference point, and / or used to determine a second offset between a second random access channel transmission opportunity and a second reference point.

[0268] For details, refer to step 210 above.

[0269] In summary, the device provided by the embodiments of the present application can share the same start frequency parameter for the first type of time domain resource and the second type of time domain resource (or the first type of transmission opportunity and the second type of transmission opportunity), which can save signaling overhead in the random access channel configuration process. While saving the signaling overhead, the same start frequency parameter corresponding to the first type of time domain resource and the second type of time domain resource is interpreted differently. Since the number, position, size, frequency domain bandwidth, etc. of the available uplink resources in the first type of time domain resource and the second type of time domain resource are different, the different interpretation methods can make the random access channel transmission opportunity effective on the first type of time domain resource and the second type of time domain resource.

[0270] FIG. 20 shows a structural block diagram of a configuration device of a random access channel provided by an example embodiment of the present application. The device can be realized as a network device or a part of a network device by software or hardware or a combination of both, and the device comprises:

[0271] The first sending module 710 is configured to configure a frequency start parameter to a terminal device, the frequency start parameter being used to determine a first offset between a first random access channel transmission opportunity and a first reference point, and / or used to determine a second offset between a second random access channel transmission opportunity and a second reference point.

[0272] For details, refer to step 310 above.

[0273] In summary, the apparatus provided by the embodiments of the present application can share the same starting frequency parameter for the first type of time domain resource and the second type of time domain resource (or the first type of transmission opportunity and the second type of transmission opportunity), thereby saving signaling overhead in the random access channel configuration process. While saving signaling overhead, the same starting frequency parameter corresponding to the first type of time domain resource and the second type of time domain resource is interpreted differently. Since 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, the different interpretation methods can make the random access channel transmission opportunity valid in the first type of time domain resource and the second type of time domain resource.

[0274] Next, the setting of the first reference point and the second reference point will be briefly introduced.

[0275] 1. The first reference point.

[0276] In some embodiments, the first reference point is the lowest PRB of the uplink BWP. That is, for the first type of time domain resource or the first type of transmission opportunity, the first reference point is the lowest PRB of the uplink BWP. The frequency starting parameter is used to determine a first offset between the first random access channel and the lowest PRB of the uplink BWP. The first offset is the offset between the first random access channel transmission opportunity and the lowest PRB of the uplink BWP.

[0277] In some embodiments, the first reference point is the highest PRB of the uplink BWP. That is, for the first type of time domain resource or the first type of transmission opportunity, the first reference point is the highest PRB of the uplink BWP. The frequency starting parameter is used to determine a first offset between the first random access channel and the highest PRB of the uplink BWP. The first offset is the offset between the first random access channel transmission opportunity and the highest PRB of the uplink BWP.

[0278] 2. The second reference point.

[0279] In some embodiments, the setting of the second reference point includes two ways, and the two setting ways of the second reference point will be introduced next.

[0280] Setting way one: the second reference point is the lowest PRB of the first frequency domain bandwidth.

[0281] In some embodiments, for the second type of time domain resource or the second type of transmission opportunity, the second reference point is the lowest PRB of the first frequency domain bandwidth. The frequency starting parameter is used to determine a second offset between the second random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth. The second offset is the offset between the second random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth.

[0282] Option 2: The second reference point is the highest PRB of the first frequency domain bandwidth.

[0283] In some embodiments, for the second type of time domain resource or the second type of transmission opportunity, the second reference point is the highest PRB of the first frequency domain bandwidth. The frequency starting parameter is used to determine a second offset between the second random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth. The second offset is an offset between the second random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth.

[0284] In some embodiments, the first offset and the second offset are the same or different.

[0285] To solve the problem, embodiments of the present application propose that different offset values can be set for the first type of time domain resource and the second type of time domain resource (or, the first type of transmission opportunity and the second type of transmission opportunity). Next, how to set different offset values for the first type of time domain resource and the second type of time domain resource (or, the first type of transmission opportunity and the second type of transmission opportunity) in the case of sharing the same frequency starting parameter is introduced.

[0286] 3. The first offset.

[0287] In some embodiments, for the first type of time domain resource or the first type of transmission opportunity, the first random access channel transmission opportunity is the lowest random access channel transmission opportunity in the frequency domain, and the first offset is determined based on the frequency starting parameter. Optionally, the first offset is equal to the frequency starting parameter.

[0288] For example, the first offset is equal to the frequency starting parameter, that is, the offset between the first random access channel transmission opportunity and the first reference point is equal to the frequency starting parameter, that is, the offset between the lowest random access channel transmission opportunity and the first reference point is equal to the frequency starting parameter. Referring to the above “1. The first reference point”, the first reference point is the lowest PRB of the uplink BWP; that is, the first offset is the offset between the lowest random access channel transmission opportunity and the lowest PRB of the uplink BWP, and the frequency starting parameter is equal to the offset between the lowest random access channel transmission opportunity and the lowest PRB of the uplink BWP.

[0289] In other words, for the first type of time domain resource or the first type of transmission opportunity, the frequency starting parameter is used to indicate the offset between the lowest random access channel transmission opportunity and the lowest PRB of the uplink BWP; or, the frequency starting parameter is used to determine the offset between the lowest random access channel transmission opportunity and the lowest PRB of the uplink BWP.

[0290] In summary, the apparatus provided by the embodiments of the present application is because the first type of time domain resource or the first type of transmission opportunity is a non-SBFD type of time domain resource or transmission opportunity. That is, the first type of time domain resource or the second type of transmission opportunity is a conventional type of time domain resource or transmission opportunity. Therefore, by using the calculation method of the first offset shown in the related art, the standard is less changed from the perspective of the first offset.

[0291] 4. The second offset.

[0292] The second type of time domain resource is a SBFD type of time domain resource, and the second type of transmission opportunity is a SBFD type of transmission opportunity. For the second type of time domain resource or the second type of transmission opportunity, the valid RO needs to ensure that the RO falls within the first frequency domain bandwidth. Therefore, three calculation methods of the second offset are designed to avoid invalid ROs in the second type of time domain resource or the second type of transmission opportunity as much as possible.

[0293] Calculation method one: linear scaling.

[0294] In some embodiments, for the second type of time domain resource or the second type of transmission opportunity, the second random access channel transmission opportunity is the lowest random access channel transmission opportunity in the frequency domain, and the second offset is determined based on the frequency start parameter and the first scaling factor.

[0295] By way of example but not limitation, the second offset is determined based on the frequency start parameter and the first scaling factor. For example, the second offset is equal to the product of the frequency start parameter and the first scaling factor, or the second offset is an integer value determined based on the product of the frequency start parameter and the first scaling factor. For example, the second offset is the first product value, the first product value is the product of the frequency start parameter and the first scaling factor; or the second offset is the value after the first product value is rounded down; or the second offset is the value after the first product value is rounded up; or the second offset is the value after the first product value is rounded; or the second offset of the random access channel transmission opportunity used by the terminal device when transmitting the random access channel relative to the second reference point is less than or equal to the offset determined based on the frequency start parameter; or there is a value set including at least one offset, and the terminal device determines the offset of the random access channel transmission opportunity used relative to the second reference point from the value set, which is less than or equal to the maximum integer value of the offset determined based on the frequency start parameter and the first scaling factor.

[0296] Wherein, the first scaling factor is determined based on at least one of the size of the first frequency domain bandwidth, the size of the uplink BWP and the bandwidth size of the random access channel transmission opportunity (i.e. RO). For example, the calculation method of the first scaling factor is as follows.

[0297] Or, or, or, or, or, or, or,

[0298] In the formula, scaling factor represents the first scaling factor; represents down rounding; represents up rounding; f(·) represents rounding.

[0299] That is, the first scaling factor is a first ratio, the first ratio is a ratio of the size of the first frequency domain bandwidth to the size of the uplink BWP; or, the first scaling factor is a value obtained by down rounding the first ratio; or, the first scaling factor is a value obtained by up rounding the first ratio; or, the first scaling factor is a value obtained by rounding the first ratio; or, the first scaling factor is a second ratio, the second ratio is a ratio of a first difference to the size of the uplink BWP, the first difference is a difference between the size of the first frequency domain bandwidth and the bandwidth size of the random access channel transmission opportunity; or, the first scaling factor is a value obtained by down rounding the second ratio; or, the first scaling factor is a value obtained by up rounding the second ratio; or, the first scaling factor is a value obtained by rounding the second ratio.

[0300] In some embodiments, in a case where the first scaling factor is an integer, the second offset is a product of the frequency start parameter and the first scaling factor. In a case where the first scaling factor is a decimal number (or a floating point number, a fraction, or the like), the second offset is an integer value determined based on a product of the frequency start parameter and the first scaling factor, e.g., the second offset is a value obtained by down rounding the product of the frequency start parameter and the first scaling factor; or, the second offset is a value obtained by up rounding the product of the frequency start parameter and the first scaling factor; or, the second offset is a value obtained by rounding the product of the frequency start parameter and the first scaling factor; or, a second offset of a random access channel transmission opportunity used by the terminal device when transmitting a random access channel with respect to the second reference point is less than or equal to an offset determined based on the frequency start parameter; or, there is a value set including at least one offset, and the terminal device determines, from the value set, an offset of a random access channel transmission opportunity used with respect to the second reference point to be less than or equal to a maximum integer value of an offset determined based on the frequency start parameter and the first scaling factor.

[0301] For example, as shown in FIG. 9, assuming that the size of the uplink BWP is 20 MHz and the size of the first frequency domain bandwidth is 10 MHz, and the second reference point is set according to the first setting mode (i.e., the second reference point is the lowest PRB of the first frequency domain bandwidth). If the first scaling factor is the ratio of the size of the first frequency domain bandwidth to the size of the uplink BWP, i.e., the first scaling factor is 0.5. At this time, the offset of the random access channel transmission opportunity 18 (or referred to as the second type transmission opportunity 18) in the second type time domain resource relative to the second reference point is the value obtained by rounding off the product of the frequency starting parameter and the first scaling factor; the offset of the random access channel transmission opportunity 19 (or referred to as the first type transmission opportunity 19) in the first type time domain resource relative to the first reference point is the frequency starting parameter. At this time, there is a certain offset between the random access channel transmission opportunity 19 in the first type time domain resource and the highest PRB in the uplink BWP corresponding to the first type time domain resource, i.e., the frequency starting parameter shown in FIG. 9 does not reach the maximum value. However, under the method shown in FIG. 9, in the case where the frequency starting parameter reaches the maximum value, the random access channel transmission opportunity 18 in the second type time domain resource may fall outside the uplink sub-band, i.e., there is an invalid random access channel transmission opportunity in the second type time domain resource.

[0302] Therefore, the method shown in FIG. 10 can be used, i.e., the first scaling factor is the second ratio, and the second ratio is the ratio of the first difference to the size of the uplink BWP, and the first difference is the difference between the size of the first frequency domain bandwidth and the bandwidth size of the random access channel transmission opportunity. Assuming that the bandwidth size of a random access channel transmission opportunity is 2 MHz, the first scaling factor is 0.4, i.e., the first scaling factor = (10-2) / 20. At this time, the offset of the random access channel transmission opportunity 20 (or referred to as the second type transmission opportunity 20) in the second type time domain resource relative to the second reference point is the value obtained by rounding off the product of the frequency starting parameter and the first scaling factor. This method can ensure that the random access channel transmission opportunity (i.e., the first type transmission opportunity) in the first type time domain resource is valid, and the random access channel transmission opportunity (i.e., the second type transmission opportunity) in the second type time domain resource is also valid.

[0303] In summary, the device provided by the embodiments of the present application avoids the problem of uplink resource fragmentation when no re-interpretation is performed, and avoids the problem of invalid RO in the random access channel transmission opportunity (or second type transmission opportunity) in the second type time domain resource when re-interpretation is performed. At the same time, the operation of multiplying the frequency start parameter by a first scaling factor is a linear operation, which can achieve the following effect: as shown in FIG. 11, for the first type time domain resource, if the random access channel transmission opportunity 21 (i.e., the first type transmission opportunity 21) in the configured first type time domain resource is in the lower half of the uplink BWP, then the second type time domain resource obtained by the method will also be interpreted in the lower half of the uplink sub-band / available PRB in the second type time domain resource; similarly, as shown in FIG. 9, for the first type time domain resource, if the random access channel transmission opportunity 19 (i.e., the first type transmission opportunity 19) in the first type time domain resource is configured in the upper half of the uplink BWP, then by the method, the second type time domain resource in the second type time domain resource will also be interpreted in the upper half of the uplink sub-band / available PRB in the second type time domain resource.

[0304] Calculation method two: determine the lower bound.

[0305] In some embodiments, for the second type time domain resource or the second type transmission opportunity, the second random access channel transmission opportunity is the lowest random access channel transmission opportunity in the frequency domain, and the second offset is determined based on the frequency start parameter. Optionally, the second offset is equal to the frequency start parameter.

[0306] For example, the second offset is equal to the frequency start parameter, that is, the offset between the second random access channel transmission opportunity and the second reference point is equal to the frequency start parameter, that is, the offset between the lowest random access channel transmission opportunity and the second reference point is equal to the frequency start parameter. Referring to the above-mentioned “2. Second reference point”, the second reference point is the lowest PRB of the first frequency domain bandwidth, or the second reference point is the highest PRB of the first frequency domain bandwidth; that is, the second offset is the offset between the lowest random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth, and the frequency start parameter is equal to the offset between the lowest random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth; or, the second offset is the offset between the lowest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth, and the frequency start parameter is equal to the offset between the lowest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth.

[0307] In other words, for the second type of time domain resource or the second type of transmission opportunity, the frequency start parameter is used to indicate an offset between the lowest random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth, or the frequency start parameter is used to indicate an offset between the lowest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth; or in other words, the frequency start parameter is used to determine an offset between the lowest random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth, or the frequency start parameter is used to determine an offset between the lowest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth.

[0308] In summary, the device provided by the embodiments of the present application not only avoids the problem of uplink resource fragmentation when no re-interpretation is performed, but also avoids the problem of invalid RO in the random access channel transmission opportunity (or the second type of transmission opportunity) in the second type of time domain resource when the RO falls completely outside the uplink sub-band / uplink available PRB after re-interpretation. At the same time, in the case of using the calculation method and the second reference point being the lowest PRB of the first frequency domain bandwidth, the effective RO can be found based on the second random access channel transmission opportunity from bottom to top.

[0309] Calculation method three: determine the upper bound.

[0310] In some embodiments, for the second type of time domain resource or the second type of transmission opportunity, the second random access channel transmission opportunity is the highest random access channel transmission opportunity in the frequency domain, and the second offset is determined based on the frequency start parameter and the uplink BWP. Optionally, the second offset is equal to the difference between the size of the uplink BWP and the frequency start parameter, i.e., the second offset is equal to the difference between the uplink BWP and the frequency start parameter. Or in other words, the second offset is equal to the second difference, and the second difference is the difference between the size of the uplink BWP and the frequency start parameter.

[0311] For example, the offset between the second random access channel transmission opportunity and the second reference point is equal to the second difference, i.e., the offset between the highest random access channel transmission opportunity and the second reference point is equal to the second difference. Referring to the above-mentioned “2. Second reference point”, the second reference point is the lowest PRB of the first frequency domain bandwidth, or the second reference point is the highest PRB of the first frequency domain bandwidth; that is, the second offset is the offset between the highest random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth, which is equal to the second difference; or the second offset is the offset between the highest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth, which is equal to the second difference.

[0312] In other words, for the second type of time domain resource or the second type of transmission opportunity, the frequency starting parameter and the size of the uplink BWP are used to determine the offset between the highest random access channel transmission opportunity and the lowest PRB of the first frequency domain bandwidth, or the frequency starting parameter and the size of the uplink BWP are used to determine the offset between the highest random access channel transmission opportunity and the highest PRB of the first frequency domain bandwidth.

[0313] In summary, the device provided by the embodiments of the present application avoids the problem of uplink resource fragmentation when no re-interpretation is performed, and to some extent, avoids the problem that the RO falls completely outside the uplink sub-band / uplink available PRB after re-interpretation, resulting in that the random access channel transmission opportunity (or the second type of transmission opportunity) in the second type of time domain resource is invalid RO. At the same time, in the case of using the calculation method and the second reference point being the highest PRB of the first frequency domain bandwidth, the effective RO can be found from top to bottom based on the second random access channel transmission opportunity.

[0314] In some embodiments, the above-mentioned calculation method two and calculation method three can be combined for implementation, that is, the terminal device determines whether to use the calculation method two or the calculation method three to determine the second offset according to the actual situation. For example, the terminal device determines that the second random access channel transmission opportunity is the lowest random access channel transmission opportunity in the frequency domain or the highest random access channel transmission opportunity in the frequency domain based on at least one of the configuration of the network device and the frequency starting parameter; and / or, determines that the second offset is determined based on the frequency starting parameter or based on the frequency starting parameter and the size of the uplink BWP based on at least one of the configuration of the network device and the frequency starting parameter; and / or, determines that the second reference point is the lowest PRB of the first frequency domain bandwidth or the highest PRB of the first frequency domain bandwidth based on at least one of the configuration of the network device and the frequency starting parameter.

[0315] 5. Other parameters of the frequency domain configuration.

[0316] In some embodiments, other parameters in the frequency domain configuration of the random access channel can also refer to the above-mentioned method to achieve that one parameter has two interpretation methods for the first type of time domain resource and the second type of time domain resource in the case of using a set of configurations.

[0317] For example, the frequency domain configuration includes a frequency division multiplexing parameter in addition to the frequency starting parameter.

[0318] In some embodiments, the first receiving module 610 is configured to receive a frequency division multiplexing parameter configured by the network device, the frequency division multiplexing parameter being used to determine a number of frequency division multiplexed random access channel transmission opportunities in a time unit; wherein for the first type of time domain resource or the first type of transmission opportunity, the number is determined based on the frequency division multiplexing parameter; and for the second type of time domain resource or the second type of transmission opportunity, the number is determined based on the frequency division multiplexing parameter and a first scaling factor.

[0319] In some embodiments, the first sending module 710 is configured to send, by the terminal device, a frequency division multiplexing parameter, the frequency division multiplexing parameter being used to determine a number of frequency division multiplexed random access channel transmission opportunities in a time unit; wherein for the first type of time domain resource or the first type of transmission opportunity, the number is determined based on the frequency division multiplexing parameter; and for the second type of time domain resource or the second type of transmission opportunity, the number is determined based on the frequency division multiplexing parameter and a first scaling factor.

[0320] By way of example and not limitation, the number of random access channel transmission opportunities is equal to the product of the frequency division multiplexing parameter and the first scaling factor; or, the number of random access channel transmission opportunities is an integer value determined based on the frequency division multiplexing parameter and the first scaling factor. That is, the number of random access channel transmission opportunities is a second product value, the second product value being the product of the frequency division multiplexing parameter and the first scaling factor; or, the number is a value obtained by rounding down the second product value; or, the number is a value obtained by rounding up the second product value; or, the number is a value obtained by rounding the second product value. The first scaling factor is determined based on at least one of the size of the first frequency domain bandwidth, the size of the uplink BWP, and the bandwidth size of the random access channel transmission opportunity. The calculation method of the first scaling factor is as shown in the calculation method shown in “4. Second offset”, which will not be described here.

[0321] In some embodiments, the number of random access channel transmission opportunities used by the terminal device when transmitting the random access channel is less than or equal to the number determined based on the frequency division multiplexing parameter. Or, there is a value set including at least one number, and the terminal device determines the number of random access channel transmission opportunities used from the value set, which is less than or equal to the maximum integer value of the number determined based on the frequency division multiplexing parameter.

[0322] In summary, the device provided by the embodiments of the present application can share a set of configurations for the first type of time domain resource and the second type of time domain resource (or the first type of transmission opportunity and the second type of transmission opportunity), thereby saving signaling overhead in the random access channel configuration process. Different interpretation methods for the first type of time domain resource and the second type of time domain resource can support the use of different numbers of random access channel transmission opportunities for the random access channel on different types of time domain resources.

[0323] In some embodiments, the first frequency domain bandwidth comprises at least one of: an uplink subband; an intersection of the uplink subband and an uplink BWP; an uplink available PRB; an uplink subband part within the uplink BWP; an available uplink subband part within the uplink BWP; a continuous uplink resource part within the uplink BWP; the uplink BWP; an actual subband; an actual uplink subband, which is an intersection of the uplink subband (also referred to as a nominal subband) and the uplink BWP; an actual uplink BWP, which is an intersection of the uplink subband and the uplink BWP; an uplink subband part in the uplink BWP within the second type of time domain resource; and an available uplink subband part in the uplink BWP within the second type of time domain resource. The first frequency domain bandwidth is specifically described in the above "6. First frequency domain bandwidth".

[0324] II. Repetition number configuration

[0325] The repeated sending of the random access channel can be divided into two cases: one is non-type-cross repetition, and the other is type-cross repetition. The non-type-cross repetition refers to that the random access channels corresponding to the repeated sending have the same type of time domain resource / transmission opportunity, i.e., the repeated sending of the random access channel is all on the first type of time domain resource, or the repeated sending of the random access channel is all on the first type of transmission opportunity, or the repeated sending of the random access channel is all on the second type of time domain resource, or the repeated sending of the random access channel is all on the second type of transmission opportunity. The type-cross repetition refers to that the random access channels corresponding to the repeated sending have different types of time domain resource / transmission opportunity, i.e., the repeated sending of the random access channel is on the first type of time domain resource and the second type of time domain resource, or the repeated sending of the random access channel is on the first type of transmission opportunity and the second type of transmission opportunity.

[0326] However, whether to support the repeated sending of the random access channel and how to design the number of repetitions of the random access channel under the introduction of the SBFD technology is still under discussion. The present application shows a method for configuring and confirming the number of repetitions of the random access channel.

[0327] FIG. 21 shows a structural block diagram of a configuration device of a random access channel according to an example embodiment of the present application. The device can be realized as a terminal device or a part of a terminal device through software or hardware or a combination of both, and the device comprises:

[0328] The determining module 810 is configured to determine the number of repetitions applicable to the random access channel according to at least one parameter.

[0329] The at least one parameter corresponds to at least one of the first type of time domain resource and the second type of time domain resource, or the at least one parameter corresponds to at least one of the first type of transmission opportunity and the second type of transmission opportunity.

[0330] In some embodiments, the number of repetitions applicable to the random access channel is a specific number or a set of numbers. For example, the number of repetitions applicable to the random access channel is 4; or the number of repetitions applicable to the random access channel is {2, 4}.

[0331] In some embodiments, the apparatus further includes a second receiving module, which is configured to receive at least one parameter sent by the network device; or receive a first parameter and a first offset value sent by the network device, and determine a second parameter based on the first parameter and the first offset value; or receive a second parameter and a second offset value sent by the network device, and determine a first parameter based on the second parameter and the second offset value; or receive a first parameter, a third offset value and a fourth offset value sent by the network device, and determine a second parameter based on the first parameter and the third offset value, and determine a third parameter based on the first parameter and the fourth offset value; or receive a second parameter, a fifth offset value and a sixth offset value sent by the network device, and determine a first parameter based on the second parameter and the fifth offset value, and determine a third parameter based on the second parameter and the sixth offset value; or receive a third parameter, a seventh offset value and an eighth offset value sent by the network device, and determine a first parameter based on the third parameter and the seventh offset value, and determine a second parameter based on the third parameter and the eighth offset value. The first parameter corresponds to the first type of time domain resource or the first type of transmission opportunity; and the second parameter corresponds to the second type of time domain resource or the second type of transmission opportunity.

[0332] For details, refer to step 410 described above.

[0333] In summary, the method provided by the embodiments of the present application can achieve the purpose of similar coverage by respectively setting at least one parameter related to the number of repetitions corresponding to the first type of time domain resource and the second type of time domain resource (or the first type of transmission opportunity and the second type of transmission opportunity), and determining the number of repetitions applicable to the random access channel according to the single PRACH performance detection result detected by the first type of time domain resource and the second type of time domain resource, respectively.

[0334] FIG. 22 shows a structural block diagram of a configuration device of a random access channel provided by an example embodiment of the present application. The device can be realized as a network device or a part of a network device by software or hardware or a combination of both, and the device includes:

[0335] The second sending module 910 is configured to send a first configuration to a terminal device, and the first configuration is used to indicate at least one parameter, and the at least one parameter is used by the terminal device to determine the number of repetitions applicable to the random access channel.

[0336] The at least one parameter corresponds to at least one of the first type of time domain resource and the second type of time domain resource, or the at least one parameter corresponds to at least one of the first type of transmission opportunity and the second type of transmission opportunity.

[0337] In some embodiments, the number of repetitions applicable to the random access channel is a specific number or a set of numbers. For example, the number of repetitions applicable to the random access channel is 4; or the number of repetitions applicable to the random access channel is {2, 4}.

[0338] In some embodiments, the second sending module 910 is further configured to send the first configuration to the terminal device, including: sending the at least one parameter to the terminal device; or sending the first parameter and the first offset value to the terminal device, the second parameter being determined based on the first parameter and the first offset value; or sending the second parameter and the second offset value to the terminal device, the first parameter being determined based on the second parameter and the second offset value; or sending the first parameter, the third offset value and the fourth offset value to the terminal device, the second parameter being determined based on the first parameter and the third offset value, and the third parameter being determined based on the first parameter and the fourth offset value; or sending the second parameter, the fifth offset value and the sixth offset value to the terminal device, the first parameter being determined based on the second parameter and the fifth offset value, and the third parameter being determined based on the second parameter and the sixth offset value; or sending the third parameter, the seventh offset value and the eighth offset value to the terminal device, the first parameter being determined based on the third parameter and the seventh offset value, and the second parameter being determined based on the third parameter and the eighth offset value.

[0339] For details, refer to step 510 described above.

[0340] In summary, the device provided by the embodiments of the present application can achieve the purpose of similar coverage by respectively setting at least one parameter related to the number of repetitions corresponding to the first type of time domain resource and the second type of time domain resource (or the first type of transmission opportunity and the second type of transmission opportunity), and determining the number of repetitions applicable to the random access channel according to the single PRACH performance detection result detected by the first type of time domain resource and the second type of time domain resource, respectively.

[0341] In some embodiments, the number of repetitions applicable to the random access channel is determined by the terminal device according to the RSRP measured by the downlink loss reference signal and the threshold value configured by the network device. Optionally, the at least one parameter is the threshold value configured by the network device.

[0342] Exemplarily, each of the at least one parameter comprises at least one of: a power threshold of the first repetition number; a power threshold of the second repetition number; a power threshold of the third repetition number. Wherein, the first repetition number is greater than the second repetition number, and the second repetition number is greater than the third repetition number. Optionally, the power threshold of the first repetition number is greater than the power threshold of the second repetition number, and the power threshold of the second repetition number is greater than the power threshold of the third repetition number. It should be noted that, in actual implementation, more or fewer power thresholds corresponding to repetition numbers can also be designed according to specific scenarios, and the embodiments of the present application do not limit this.

[0343] By way of example but not limitation, the at least one parameter comprises a first parameter and a second parameter, the first parameter comprises a power threshold of the first repetition number, a power threshold of the second repetition number and a power threshold of the third repetition number; and the second parameter comprises a power threshold of the second repetition number and a power threshold of the third repetition number. However, the power threshold of the first repetition number included in the first parameter and the power threshold of the first repetition number included in the second parameter can be the same or different. That is, the value of the power threshold corresponding to the same repetition number included in each parameter can be the same or different.

[0344] Exemplarily, the power threshold of the first repetition number is the parameter rsrp-ThresholdMsg1-RepetitionNum8, the power threshold of the second repetition number is the parameter rsrp-ThresholdMsg1-RepetitionNum4, and the power threshold of the third repetition number is the parameter rsrp-ThresholdMsg1-RepetitionNum2.

[0345] 1. Two parameters.

[0346] In some embodiments, the at least one parameter comprises a first parameter and a second parameter. The first parameter corresponds to a first type of time domain resource, and the second parameter corresponds to a second type of time domain resource; or, the first parameter corresponds to a first type of transmission opportunity, and the second parameter corresponds to a second type of transmission opportunity.

[0347] Firstly, the non-cross-type repetition is described.

[0348] 1.1 Non-cross-type repetition.

[0349] In a case where it is determined that the repeated sending of the random access channel is not cross-type repetition, if the random access channel transmission opportunity is repeatedly sent on the first type of time domain resource or the first type of transmission opportunity, the number of repetitions is determined based on the first parameter; or, if the random access channel is repeatedly sent on the second type of time domain resource or the second type of transmission opportunity, the number of repetitions is determined based on the second parameter. That is, the number of repetitions is determined according to the type of time domain resource or the type of transmission opportunity corresponding to the random access channel.

[0350] For example, the random access channel is determined to be repeatedly sent on the first type of time domain resource, the first parameter includes a power threshold of the first number of repetitions and a power threshold of the second number of repetitions, and the terminal device determines the number of repetitions of the random access channel to be the first number of repetitions or the second number of repetitions according to the measured RSRP.

[0351] In some embodiments, if the random access channel is repeatedly sent on the first type of time domain resource or the first type of transmission opportunity; in a case where the first parameter includes a power threshold of the first number of repetitions, and the measured RSRP is lower than the power threshold of the first number of repetitions, the number of repetitions includes the first number of repetitions; in a case where the first parameter includes a power threshold of the second number of repetitions, and the measured RSRP is lower than the power threshold of the second number of repetitions, the number of repetitions includes the second number of repetitions; in a case where the first parameter includes a power threshold of the third number of repetitions, and the measured RSRP is lower than the power threshold of the third number of repetitions, the number of repetitions includes the third number of repetitions; in a case where the measured RSRP is not lower than any power threshold included in the first parameter, the number of repetitions is the minimum number of repetitions configured for the current BWP, the current BWP refers to the BWP in which the random access channel is transmitted, and the minimum number of repetitions is configured by the network device. And / or, if the random access channel is repeatedly sent on the second type of time domain resource or the second type of transmission opportunity; in a case where the second parameter includes a power threshold of the first number of repetitions, and the measured RSRP is lower than the power threshold of the first number of repetitions, the number of repetitions includes the first number of repetitions; in a case where the second parameter includes a power threshold of the second number of repetitions, and the measured RSRP is lower than the power threshold of the second number of repetitions, the number of repetitions includes the second number of repetitions; in a case where the second parameter includes a power threshold of the third number of repetitions, and the measured RSRP is lower than the power threshold of the third number of repetitions, the number of repetitions includes the third number of repetitions; in a case where the measured RSRP is not lower than any power threshold included in the second parameter, the number of repetitions is the minimum number of repetitions configured for the current BWP.

[0352] In some embodiments, in the case that the number of repetitions determined by the terminal device includes multiple numbers of repetitions; for example, the first number of repetitions is 8, the second number of repetitions is 4, and the third number of repetitions is 2, the first parameter includes the power threshold of the first number of repetitions, the power threshold of the second number of repetitions, and the power threshold of the third number of repetitions, and the measured RSRP is lower than the power threshold of the first number of repetitions, lower than the power threshold of the second number of repetitions, and lower than the power threshold of the third number of repetitions, then the number of repetitions finally determined by the terminal device includes {2, 4, 8}. Alternatively, the terminal device first uses a smaller number of repetitions for repeated transmission of the random access channel, for example, the terminal device first transmits according to the number of repetitions of 2, if n times of transmission are still unsuccessful, a larger number of repetitions is selected, for example, the number of repetitions of 4 is used for reattempt, until the maximum number of repetitions confirmed is reached or the random access is successful.

[0353] Next, cross-type repetition is described.

[0354] 1.2 Cross-type repetition.

[0355] In the case that the repeated transmission of the random access channel is cross-type repetition, that is, if the random access channel is repeatedly transmitted on the first type of time domain resource and the second type of time domain resource, the number of repetitions is determined based on the type of time domain resource corresponding to the first transmission of the random access channel; or, if the random access channel is repeatedly transmitted on the first type of transmission opportunity and the second type of transmission opportunity, the number of repetitions is determined based on the type of transmission opportunity corresponding to the first transmission of the random access channel.

[0356] For example, the first transmission corresponds to the first type of time domain resource, then the number of repetitions is determined based on the first parameter corresponding to the first type of time domain resource; or, the first transmission corresponds to the second type of transmission opportunity, then the number of repetitions is determined based on the second parameter corresponding to the second type of transmission opportunity.

[0357] In some embodiments, the repetition number comprises a first repetition number in a case that the first parameter comprises a power threshold of the first repetition number, the measured RSRP is lower than the power threshold of the first repetition number in the first parameter, and the first transmission of the random access channel corresponds to the first type of time domain resource or the first type of transmission opportunity; the repetition number comprises a second repetition number in a case that the first parameter comprises a power threshold of the second repetition number, the measured RSRP is lower than the power threshold of the second repetition number in the first parameter, and the first transmission of the random access channel corresponds to the first type of time domain resource or the first type of transmission opportunity; the repetition number comprises a third repetition number in a case that the first parameter comprises a power threshold of the third repetition number, the measured RSRP is lower than the power threshold of the third repetition number in the first parameter, and the first transmission of the random access channel corresponds to the first type of time domain resource or the first type of transmission opportunity; the repetition number is a minimum repetition number configured for a current BWP in a case that the first transmission of the random access channel corresponds to the first type of time domain resource or the first type of transmission opportunity, and the measured RSRP is not lower than any power threshold comprised in the first parameter, the current BWP being a BWP in which the random access channel is transmitted, and the minimum repetition number being configured by the network device; the repetition number comprises the first repetition number in a case that the second parameter comprises a power threshold of the first repetition number, the measured RSRP is lower than the power threshold of the first repetition number in the second parameter, and the first transmission of the random access channel corresponds to the second type of time domain resource or the second type of transmission opportunity; the repetition number comprises the second repetition number in a case that the second parameter comprises a power threshold of the second repetition number, the measured RSRP is lower than the power threshold of the second repetition number in the second parameter, and the first transmission of the random access channel corresponds to the second type of time domain resource or the second type of transmission opportunity; the repetition number comprises the third repetition number in a case that the second parameter comprises a power threshold of the third repetition number, the measured RSRP is lower than the power threshold of the third repetition number in the second parameter, and the first transmission of the random access channel corresponds to the second type of time domain resource or the second type of transmission opportunity; and the repetition number is a minimum repetition number configured for a current BWP in a case that the first transmission of the random access channel corresponds to the second type of time domain resource or the second type of transmission opportunity, and the measured RSRP is not lower than any power threshold comprised in the second parameter.

[0358] 2. three parameters.

[0359] In some embodiments, the at least one parameter further comprises a third parameter in addition to the first parameter and the second parameter. The first parameter corresponds to the first type of time domain resource, the second parameter corresponds to the second type of time domain resource, and the third parameter corresponds to the first type of time domain resource and the second type of time domain resource; or, the first parameter corresponds to the first type of transmission opportunity, the second parameter corresponds to the second type of transmission opportunity, and the third parameter corresponds to the first type of transmission opportunity and the second type of transmission opportunity.

[0360] Firstly, the non-cross-type repetition is described.

[0361] 2.1 Non-cross-type repetition

[0362] In a case where it is determined that the repeated sending of the random access channel is non-cross-type repetition, if the random access channel transmission opportunity is repeatedly sent on the first type of time domain resource or the first type of transmission opportunity, the number of repetitions is determined based on the first parameter; or, if the random access channel is repeatedly sent on the second type of time domain resource or the second type of transmission opportunity, the number of repetitions is determined based on the second parameter. That is, the number of repetitions is determined according to the type of time domain resource or the type of transmission opportunity corresponding to the random access channel.

[0363] It should be noted that the non-cross-type repetition designed based on the three parameters is basically the same as the above-mentioned “1.1 Non-cross-type repetition” designed based on the two parameters, and the specific content can be referred to the above-mentioned “1.1 Non-cross-type repetition”.

[0364] 2.2 Cross-type repetition

[0365] In a case where it is determined that the repeated sending of the random access channel is non-cross-type repetition, that is, if the random access channel is repeatedly sent on the first type of time domain resource and the second type of time domain resource, the number of repetitions is determined based on the third parameter; or, if the random access channel is repeatedly sent on the first type of transmission opportunity and the second type of transmission opportunity, the number of repetitions is determined based on the third parameter.

[0366] In some embodiments, in a case where the third parameter comprises a power threshold of a first number of repetitions, and the measured RSRP is lower than the power threshold of the first number of repetitions in the third parameter, the number of repetitions comprises the first number of repetitions; in a case where the third parameter comprises a power threshold of a second number of repetitions, and the measured RSRP is lower than the power threshold of the second number of repetitions in the third parameter, the number of repetitions comprises the second number of repetitions; in a case where the third parameter comprises a power threshold of a third number of repetitions, and the measured RSRP is lower than the power threshold of the third number of repetitions in the third parameter, the number of repetitions comprises the third number of repetitions; in a case where the measured RSRP is not lower than any power threshold comprised in the third parameter, the number of repetitions is the minimum number of repetitions configured for the current BWP, the current BWP refers to the BWP in which the random access channel is transmitted, and the minimum number of repetitions is configured by the network device.

[0367] It should be noted that the apparatus provided by the above embodiments is only used as an example for the division of the above functional modules. In actual applications, 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.

[0368] As to 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 will not be described in detail here.

[0369] FIG. 23 shows a structural schematic diagram of a terminal device provided by an example embodiment of the present application. The terminal device 1000 can be used to execute the method steps performed by the terminal device in the above embodiments. The terminal device 1000 can include a processor 1001, a transceiver 1002, and a memory 1003. The processor 1001 can be used to control sending and / or receiving. The transceiver 1002 can be used to implement the functions of sending and / or receiving, such as the functions of at least one of the first receiving module 610, the determining module 810, and the second receiving module.

[0370] The processor 1001 includes one or more processing cores. The processor 1001 performs various functional applications and information processing by running software programs and modules.

[0371] The transceiver 1002 can include a receiver and a transmitter, for example. The receiver and the transmitter can be implemented as the same wireless communication component, which can include a wireless communication chip and a radio frequency antenna.

[0372] The memory 1003 can be connected to the processor 1001 and the transceiver 1002.

[0373] The memory 1003 can be used to store computer programs executed by the processor. The processor 1001 is used to execute the computer programs to implement various steps in the above method embodiments.

[0374] In addition, the memory 1003 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.

[0375] For details not described in this embodiment, refer to the above embodiments, which will not be described here.

[0376] FIG. 24 shows a structural diagram of a network device according to an example embodiment of the present application. The network device 1100 can be used to perform the method steps performed by the network device in the above embodiments. The network device 1100 can include a processor 1101, a transceiver 1102, and a memory 1103. The processor 1101 can be used to control the sending and / or receiving. The transceiver 1102 can be used to implement the functions of sending and / or receiving, such as the functions of at least one of the first sending module 710 and the second sending module 910 described above.

[0377] The processor 1101 includes one or more processing cores. The processor 1101 performs various functional applications and information processing by running software programs and modules.

[0378] The transceiver 1102 can include a receiver and a transmitter. For example, the transceiver 1102 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 1102 can also include a wireless communication component, which can include a wireless communication chip and a radio frequency antenna.

[0379] The memory 1103 can be connected to the processor 1101 and the transceiver 1102.

[0380] The memory 1103 can be used to store computer programs executed by the processor. The processor 1101 is used to execute the computer programs to implement the various steps performed by the network device in the above method embodiments.

[0381] In addition, the memory 1103 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: 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.

[0382] For details not described in the present embodiment, please refer to the above embodiments, which will not be repeated here.

[0383] The embodiment of the application further provides a computer readable storage medium, and the computer readable storage medium stores a computer program. The computer program is used for being executed by a processor to implement the method for configuring 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 disc, and the like. The random access memory can include a ReRAM (Resistance Random Access Memory) and a DRAM (Dynamic Random Access Memory).

[0384] The embodiment of the application further provides a chip, and the chip includes a programmable logic circuit and / or program instructions. When the chip is running, the programmable logic circuit and / or the program instructions are used to implement the method for configuring a random access channel.

[0385] The embodiment of the application further provides a computer program product, and the computer program product includes a computer program. The computer program is stored in a computer readable storage medium. A processor reads and executes the computer program from the computer readable storage medium to implement the method for configuring a random access channel.

[0386] It should be understood that the "indication" mentioned in the embodiments of the application can be direct indication, indirect indication, or can be an indication of an associated relationship. For example, A indicates B, which can mean that B can be obtained by A, or A indirectly indicates B, for example, A indicates C, and B can be obtained by C, or A and B have an associated relationship.

[0387] In the description of the embodiments of the application, the term "corresponding" can mean that there is a direct or indirect corresponding relationship between the two, or can mean that there is an associated relationship between the two, or can mean an indication and being indicated, configuration and being configured, and the like.

[0388] "Multiple" mentioned in the present text 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 means that the associated objects before and after it are in an "or" relationship.

[0389] "Greater than or equal to" mentioned in the present text can mean greater than or equal to, and "less than or equal to" can mean less than or equal to.

[0390] In addition, the step numbers described herein only exemplarily show a possible execution sequence between steps, and in some other embodiments, the above steps can also be executed in a sequence different from the numbers, such as two steps with different numbers are executed at the same time, or two steps with different numbers are executed in a sequence opposite to the illustration, which is not limited in the embodiments of the present application.

[0391] Those skilled in the art can realize that, in one or more examples described above, the functions described in the embodiments of the present application can be implemented in hardware, software, firmware or any combination thereof. When implemented in software, the 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 computer storage medium and communication medium, and the communication medium includes any medium that facilitates the transfer of computer programs from one place to another. The storage medium can be any available medium accessible by a general or special purpose computer.

[0392] The above is only an exemplary embodiment of the present application, and is not intended 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

A method for configuring a random access channel, characterized in that, The method is performed by a terminal device, and the method comprises: receiving a frequency start parameter configured by a network device, the frequency start parameter being used to determine a first offset between a first random access channel transmission opportunity and a first reference point, and / or, used to determine a second offset between the second random access channel transmission opportunity and a second reference point; wherein the first reference point corresponds to a first type of time domain resource, and the second reference point corresponds to a second type of time domain resource; or, the first reference point corresponds to a first type of transmission opportunity, and the second reference point corresponds to a second type of transmission opportunity. The method of claim 1, wherein For the second type of time domain resource or the second type of transmission opportunity, the second reference point is a lowest PRB of a first frequency domain bandwidth. The method of claim 1, wherein For the second type of time domain resource or the second type of transmission opportunity, the second reference point is a highest PRB of the first frequency domain bandwidth. The method according to claim 2 or 3, characterized in that For the first type of time domain resource or the first type of transmission opportunity, the first reference point is a lowest PRB of an uplink BWP. The method according to claim 2, characterized in that For the second type of time domain resource or the second type of transmission opportunity, the second random access channel transmission opportunity is a lowest random access channel transmission opportunity in a frequency domain, and the second offset is determined based on the frequency start parameter and a first scaling factor. The method according to claim 5, characterized in that The second offset is a first product value determined based on the frequency start parameter and the first scaling factor; or, the second offset is a value obtained by rounding down the first product value; or, the second offset is a value obtained by rounding up the first product value; or, the second offset is a value obtained by rounding the first product value. The method according to claim 2 or 3, characterized in that For the second type of time domain resource or the second type of transmission opportunity, the second random access channel transmission opportunity is a lowest random access channel transmission opportunity in a frequency domain, and the second offset is determined based on the frequency start parameter; and / or, for the second type of time domain resource or the second type of transmission opportunity, the second random access channel transmission opportunity is a highest random access channel transmission opportunity in a frequency domain, and the second offset is determined based on the frequency start parameter and a size of the uplink BWP. The method of claim 7, wherein The method further comprises: determining, based on at least one of a configuration of the network device and the frequency start parameter, that the second random access channel transmission opportunity is a lowest random access channel transmission opportunity in a frequency domain, or, a highest random access channel transmission opportunity in a frequency domain; and / or, determining, based on at least one of the configuration of the network device and the frequency start parameter, that the second offset is determined based on the frequency start parameter, or, determined based on the frequency start parameter and the size of the uplink BWP; and / or, determining, based on at least one of the configuration of the network device and the frequency start parameter, that the second reference point is a lowest PRB of the first frequency domain bandwidth, or, a highest PRB of the first frequency domain bandwidth. The method according to claim 4, characterized in that For the first type of time domain resource or the first type of transmission opportunity, the first random access channel transmission opportunity is a lowest random access channel transmission opportunity in a frequency domain, and the first offset is determined based on the frequency start parameter. The method according to any one of claims 1 to 9, characterized in that The method further includes: receiving a frequency division multiplexing parameter configured by the network device, the frequency division multiplexing parameter being used to determine a number of frequency division multiplexed random access channel transmission opportunities in a time unit; wherein, for the first type of time domain resource or the first type of transmission opportunity, the number is determined based on the frequency division multiplexing parameter; and for the second type of time domain resource or the second type of transmission opportunity, the number is determined based on the frequency division multiplexing parameter and a first scaling factor. The method according to claim 5 or 6 or 10, characterized in that The first scaling factor is determined based on at least one of a size of the first frequency domain bandwidth, a size of the uplink BWP, or a bandwidth size of the random access channel transmission opportunity. The method of claim 11, wherein The first scaling factor is a first ratio of the size of the first frequency domain bandwidth to the size of the uplink BWP; or, the first scaling factor is a value obtained by rounding down the first ratio; or, the first scaling factor is a value obtained by rounding up the first ratio; or, the first scaling factor is a value obtained by rounding the first ratio; or, the first scaling factor is a second ratio of a first difference to the size of the uplink BWP, the first difference being a difference between the size of the first frequency domain bandwidth and the bandwidth size of the random access channel transmission opportunity; or, the first scaling factor is a value obtained by rounding down the second ratio; or, the first scaling factor is a value obtained by rounding up the second ratio; or, the first scaling factor is a value obtained by rounding the second ratio. The method according to any one of claims 1 to 12, characterized in that The first frequency domain bandwidth includes at least one of: an uplink sub-band; an intersection of the uplink sub-band and the uplink BWP; an uplink available PRB; an uplink sub-band part within the uplink BWP; an available uplink sub-band part within the uplink BWP; or a continuous uplink resource within the uplink BWP. A method for configuring a random access channel, characterized in that, The method is performed by a terminal device, and the method includes: determining, according to at least one parameter, a number of repetitions applicable to the random access channel; wherein, the at least one parameter corresponds to at least one of a first type of time domain resource and a second type of time domain resource; or, the at least one parameter corresponds to at least one of a first type of transmission opportunity and a second type of transmission opportunity. The method of claim 14, wherein The at least one parameter includes a first parameter and a second parameter; the first parameter corresponds to the first type of time domain resource, and the second parameter corresponds to the second type of time domain resource; or, the first parameter corresponds to the first type of transmission opportunity, and the second parameter corresponds to the second type of transmission opportunity. The method of claim 15, wherein The at least one parameter further includes a third parameter; the third parameter corresponds to the first type of time domain resource and the second type of time domain resource; or, the third parameter corresponds to the second type of transmission opportunity and the second type of transmission opportunity. The method according to any one of claims 14 to 16, characterized in that Each of the at least one parameter comprises at least one of: a power threshold of the first repetition number; a power threshold of the second repetition number; a power threshold of the third repetition number. The method according to claim 15 or 17, characterized in that If the random access channel is repeatedly transmitted on the first type of time domain resource and the second type of time domain resource, the repetition number is determined based on the time domain resource type corresponding to the first transmission of the random access channel; or, if the random access channel is repeatedly transmitted on the first type of transmission opportunity and the second type of transmission opportunity, the repetition number is determined based on the transmission opportunity type corresponding to the first transmission of the random access channel. The method according to claim 16 or 17, characterized in that If the random access channel is repeatedly transmitted on the first type of time domain resource and the second type of time domain resource, the repetition number is determined based on the third parameter; or, if the random access channel is repeatedly transmitted on the first type of transmission opportunity and the second type of transmission opportunity, the repetition number is determined based on the third parameter. The method according to any one of claims 15 to 19, characterized in that If the random access channel is repeatedly transmitted on the first type of time domain resource or the first type of transmission opportunity, the repetition number is determined based on the first parameter; or, if the random access channel is repeatedly transmitted on the second type of time domain resource or the second type of transmission opportunity, the repetition number is determined based on the second parameter. The method according to claim 14 or 15 or 17 or 18 or 20, characterized in that The method further comprises: receiving the at least one parameter transmitted by the network device; or, receiving the first parameter and a first offset value transmitted by the network device, the second parameter being determined based on the first parameter and the first offset value; or, receiving the second parameter and a second offset value transmitted by the network device, the first parameter being determined based on the second parameter and the second offset value; or, receiving the first parameter, a third offset value and a fourth offset value transmitted by the network device, the second parameter being determined based on the first parameter and the third offset value, and the third parameter being determined based on the first parameter and the fourth offset value; or, receiving the second parameter, a fifth offset value and a sixth offset value transmitted by the network device, the first parameter being determined based on the second parameter and the fifth offset value, and the third parameter being determined based on the second parameter and the sixth offset value; or, receiving the third parameter, a seventh offset value and an eighth offset value transmitted by the network device, the first parameter being determined based on the third parameter and the seventh offset value, and the second parameter being determined based on the third parameter and the eighth offset value. A method for configuring a random access channel, characterized in that, The method is performed by a network device, and the method comprises: configuring a frequency start parameter for a terminal device, the frequency start parameter being used to determine a first offset between a first random access channel transmission opportunity and a first reference point, and / or being used to determine a second offset between a second random access channel transmission opportunity and a second reference point; wherein the first reference point corresponds to a first type of time domain resource, and the second reference point corresponds to a second type of time domain resource; or, the first reference point corresponds to a first type of transmission opportunity, and the second reference point corresponds to a second type of transmission opportunity. The method of claim 22, wherein For the second type of time domain resource or the second type of transmission opportunity, the second reference point is a lowest PRB of the first frequency domain bandwidth. The method of claim 22, wherein For the second type of time domain resource or the second type of transmission opportunity, the second reference point is a highest PRB of the first frequency domain bandwidth. The method according to claim 23 or 24, characterized in that For the first type of time domain resource or the first type of transmission opportunity, the first reference point is a lowest PRB of the uplink BWP. The method of claim 23, wherein For the second type of time domain resource or the second type of transmission opportunity, the second random access channel transmission opportunity is a lowest random access channel transmission opportunity in a frequency domain, and the second offset is determined based on the frequency start parameter and a first scaling factor. The method of claim 26, wherein The second offset is a first product value determined based on the frequency start parameter and the first scaling factor, or the second offset is a value obtained by rounding down the first product value, or the second offset is a value obtained by rounding up the first product value, or the second offset is a value obtained by rounding the first product value. The method according to claim 23 or 24, characterized in that For the second type of time domain resource or the second type of transmission opportunity, the second random access channel transmission opportunity is a lowest random access channel transmission opportunity in a frequency domain, and the second offset is determined based on the frequency start parameter; or for the second type of time domain resource or the second type of transmission opportunity, the second random access channel transmission opportunity is a highest random access channel transmission opportunity in a frequency domain, and the second offset is determined based on the frequency start parameter and a size of the uplink BWP. The terminal device determines, based on at least one of a configuration of the network device and a size of the frequency start parameter, that the second random access channel transmission opportunity is a lowest random access channel transmission opportunity in a frequency domain or a highest random access channel transmission opportunity in a frequency domain; and / or the terminal device determines, based on at least one of the configuration of the network device and the size of the frequency start parameter, that the second offset is determined based on the frequency start parameter or based on the frequency start parameter and the size of the uplink BWP; and / or based on at least one of the configuration of the network device and the size of the frequency start parameter, the second reference point is determined to be a lowest PRB of the first frequency domain bandwidth or a highest PRB of the first frequency domain bandwidth. The method of claim 28, wherein For the first type of time domain resource or the first type of transmission opportunity, the first random access channel transmission opportunity is a lowest random access channel transmission opportunity in a frequency domain, and the first offset is determined based on the frequency start parameter. The method of claim 25, wherein The method further includes: The method according to any one of claims 22 to 30, characterized in that sending, to the terminal device, a frequency division multiplexing parameter used to determine a number of frequency division multiplexed random access channel transmission opportunities in one time unit; wherein for the first type of time domain resource or the first type of transmission opportunity, the number is determined based on the frequency division multiplexing parameter; and for the second type of time domain resource or the second type of transmission opportunity, the number is determined based on the frequency division multiplexing parameter and a first scaling factor. ​ The method according to claim 26 or 27 or 31, characterized in that The first scaling factor is determined based on at least one of a size of the first frequency domain bandwidth, a size of the uplink BWP, and a bandwidth size of the random access channel transmission opportunity. The method of claim 32, wherein The first scaling factor is a first ratio of the size of the first frequency domain bandwidth to the size of the uplink BWP, or the first scaling factor is a value obtained by down rounding the first ratio, or the first scaling factor is a value obtained by up rounding the first ratio, or the first scaling factor is a value obtained by rounding the first ratio, or the first scaling factor is a second ratio of a first difference to the size of the uplink BWP, the first difference being a difference between the size of the first frequency domain bandwidth and the bandwidth size of the random access channel transmission opportunity, or the first scaling factor is a value obtained by down rounding the second ratio, or the first scaling factor is a value obtained by up rounding the second ratio, or the first scaling factor is a value obtained by rounding the second ratio. The method according to any one of claims 22 to 33, characterized in that The first frequency domain bandwidth includes at least one of an uplink subband, an intersection of the uplink subband and the uplink BWP, an uplink available PRB, an uplink subband part within the uplink BWP, an available uplink subband part within the uplink BWP, or a continuous uplink resource within the uplink BWP. A method for configuring a random access channel, characterized in that, The method is performed by a network device, and the method includes: sending, to a terminal device, a first configuration, the first configuration being used to indicate at least one parameter, the at least one parameter being used by the terminal device to determine a repetition number applicable to a random access channel; wherein the at least one parameter corresponds to at least one of a first type of time domain resource and a second type of time domain resource, or the at least one parameter corresponds to at least one of a first type of transmission opportunity and a second type of transmission opportunity. The method of claim 35, wherein The at least one parameter includes a first parameter and a second parameter, the first parameter corresponding to the first type of time domain resource, and the second parameter corresponding to the second type of time domain resource, or the first parameter corresponding to the first type of transmission opportunity, and the second parameter corresponding to the second type of transmission opportunity. The method of claim 36, wherein The at least one parameter further includes a third parameter, the third parameter corresponding to the first type of time domain resource and the second type of time domain resource, or the third parameter corresponding to the second type of transmission opportunity and the second type of transmission opportunity. The method according to claim 36 or 37, characterized in that Each of the at least one parameter includes at least one of a power threshold of a first repetition number, a power threshold of a second repetition number, or a power threshold of a third repetition number. The method according to claim 36 or 38, characterized in that If the random access channel is repeatedly transmitted on the first type of time domain resource and the second type of time domain resource, the repetition number is determined based on a time domain resource type corresponding to a first transmission of the random access channel, or if the random access channel is repeatedly transmitted on the first type of transmission opportunity and the second type of transmission opportunity, the repetition number is determined based on a transmission opportunity type corresponding to the first transmission of the random access channel. The method according to claim 37 or 38, characterized in that If the random access channel is repeatedly sent on the first type of time domain resource and the second type of time domain resource, the number of repetitions is determined based on the third parameter; or, if the random access channel is repeatedly sent on the first type of transmission opportunity and the second type of transmission opportunity, the number of repetitions is determined based on the third parameter. The method according to any one of claims 36 to 40, characterized in that If the random access channel is repeatedly sent on the first type of time domain resource or the first type of transmission opportunity, the number of repetitions is determined based on the first parameter; or, if the random access channel is repeatedly sent on the second type of time domain resource or the second type of transmission opportunity, the number of repetitions is determined based on the second parameter. The method according to any one of claims 35 to 41, characterized in that The first configuration includes: The at least one parameter is sent to the terminal device; or, the first parameter and the first offset value are sent to the terminal device, and the The second parameter is determined based on the first parameter and the first offset value; or, the second parameter and the second offset value are sent to the terminal device, and the first parameter is determined based on the second parameter and the second offset value; or, the first parameter, the third offset value and the fourth offset value are sent to the terminal device, the second parameter is determined based on the first parameter and the third offset value, and the third parameter is determined based on the first parameter and the fourth offset value; or, the second parameter, the fifth offset value and the sixth offset value are sent to the terminal device, the first parameter is determined based on the second parameter and the fifth offset value, and the third parameter is determined based on the second parameter and the sixth offset value; or, the third parameter, the seventh offset value and the eighth offset value are sent to the terminal device, the first parameter is determined based on the third parameter and the seventh offset value, and the second parameter is determined based on the third parameter and the eighth offset value. An apparatus for configuring a random access channel, characterized by The apparatus includes: The first receiving module is configured to receive a frequency start parameter configured by a network device, the frequency start parameter being used to determine a first offset between a first random access channel transmission opportunity and a first reference point, and / or being used to determine a second offset between a second random access channel transmission opportunity and a second reference point. The first reference point corresponds to a first type of time domain resource, and the second reference point corresponds to a second type of time domain resource; or, the first reference point corresponds to a first type of transmission opportunity, and the second reference point corresponds to a second type of transmission opportunity. An apparatus for configuring a random access channel, characterized by The apparatus includes: The determining module is configured to determine a number of repetitions applicable to the random access channel according to at least one parameter. The at least one parameter corresponds to at least one of a first type of time domain resource and a second type of time domain resource; or, the at least one parameter corresponds to at least one of a first type of transmission opportunity and a second type of transmission opportunity. An apparatus for configuring a random access channel, characterized by The apparatus includes: The first sending module is configured to configure a frequency start parameter for a terminal device, the frequency start parameter being used to determine a first offset between a first random access channel transmission opportunity and a first reference point, and / or being used to determine a second offset between a second random access channel transmission opportunity and a second reference point. The first reference point corresponds to a first type of time domain resource, and the second reference point corresponds to a second type of time domain resource; or the first reference point corresponds to a first type of transmission opportunity, and the second reference point corresponds to a second type of transmission opportunity. An apparatus for configuring a random access channel, characterized by The apparatus includes The second sending module is configured to send a first configuration to a terminal device, the first configuration being used to indicate at least one parameter, the at least one parameter being used by the terminal device to determine a number of repetitions applicable to a random access channel; The at least one parameter corresponds to at least one of a first type of time domain resource and a second type of time domain resource; or the at least one parameter corresponds to at least one of a first type of transmission opportunity and a second type of transmission opportunity. A terminal device, characterized by comprising: The terminal device includes 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 configuring a random access channel according to any one of claims 1 to 21. A network device, characterized in that The network device includes 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 configuring a random access channel according to any one of claims 22 to 42. A computer-readable storage medium, characterized by 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 configuring a random access channel according to any one of claims 1 to 42. A chip characterized by The chip includes programmable logic circuit and / or program instructions, and when the chip is running on a terminal device or a network device, the programmable logic circuit and / or program instructions are used to implement the method for configuring a random access channel according to any one of claims 1 to 42. A computer program product, characterized in that The computer program product includes 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 configuring a random access channel according to any one of claims 1 to 42.

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