Wireless communication method, terminal device and base station for coverage enhancement

Abstract

A wireless communication method for coverage enhancement. And the base station sends random access channel (RACH) opportunity configuration to the terminal equipment in the configuration message. The RACH occasion (RO) configures a plurality of ROs indicating a repetition of a physical random access channel (PRACH) transmission of the terminal device (referred to as a PRACH repetition). And the terminal device selects a plurality of ROs from the plurality of ROs indicated by the RACH opportunity configuration in the configuration message, and sends one or more PRACH repetitions of the terminal device in the selected plurality of ROs. And the base station receives one or more PRACH repetitions of the terminal device by monitoring the RO indicated by the RACH occasion configuration in the configuration message.

Description

Technical Field

[0001] The present invention relates to the field of communication systems, and more specifically, to a wireless communication method, terminal equipment and base station. Background Art

[0002] Wireless communication systems, such as the third generation (3G) mobile phone standards and technologies are well known. Such 3G standards and technologies are developed by the Third Generation Partnership Project (3GPP). The third generation of wireless communications is generally developed to support macrocellular mobile phone communications. Communication systems and networks have evolved into broadband and mobile systems. In a cellular wireless communication system, a user equipment (UE) is connected to a radio access network (RAN) via a wireless link. The RAN includes a group of base stations (BSs) that provide wireless links for the UEs in the cells covered by the base stations and provide an interface with a core network (CN), which provides control of the entire network. It will be appreciated that the RAN and the CN perform their respective functions for the entire network. The 3GPP developed the so-called Long Term Evolution (LTE) system, namely the Evolved Universal Mobile Telecommunication System Territorial Radio Access Network (E-UTRAN), for mobile access networks, where one or more macro cells are supported by base stations called eNodeB or eNB (evolved NodeB). Recently, LTE is further evolving towards the so-called 5G or New Radio (NR) system, where one or more cells are supported by base stations called gNBs. Technical issues

[0003] In the RAN#94 meeting, a new Rel-18 work item on NR coverage enhancement was approved. The goal of the study item is to study potential coverage enhancement solutions for specific scenarios in FR1 and FR2. Some potential coverage enhancement methods have been discussed in the previous RAN1 meeting, however, there are still some issues that need to be enhanced.

[0004] In the current specification, the legacy (Rel-15~17) RACH opportunity resources are configured by the gNB via SIB1. The UE randomly selects a PRACH preamble and sends it on a valid random access channel (RACH) opportunity (RO). When multiple PRACH transmissions are enabled, if the RO of the legacy PRACH is also used for multiple PRACH transmissions, the collision probability between the legacy UE and the enhanced UE (UE with multiple PRACH transmissions) will increase significantly. This has a great impact on the legacy UE. Summary of the invention

[0005] An object of the present invention is to provide a user equipment, a base station and a wireless communication method.

[0006] In a first aspect, an embodiment of the invention provides a wireless communication method executable in a base station, comprising: Sending a random access channel (RACH) opportunity configuration in at least one configuration message, wherein the RACH opportunity (RO) configuration is used for repetition of a physical random access channel (PRACH) transmission of a terminal device, referred to as a PRACH repetition; and One or more PRACH repetitions of the terminal device are received by monitoring a plurality of ROs indicated by the RACH opportunity configuration in the configuration message.

[0007] In a second aspect, an embodiment of the invention provides a base station, comprising a processor configured to call and run a computer program stored in a memory so that a device equipped with the chip executes the method and any combination of embodiments of the method.

[0008] In a third aspect, an embodiment of the invention provides a wireless communication method executable in a terminal device, comprising: Receiving a random access channel (RACH) opportunity configuration in a configuration message, wherein the RACH opportunity (RO) configuration indicates a number of ROs of repetitions (referred to as PRACH repetitions) of a physical random access channel (PRACH) transmission of the terminal device; Selecting a plurality of ROs from the plurality of ROs indicated by the RACH opportunity configuration in the configuration message; and sending one or more PRACH repetitions of the terminal device in the selected plurality of ROs.

[0009] In a fourth aspect, an embodiment of the invention provides a terminal device, comprising a processor configured to call and run a computer program stored in a memory so that a device equipped with the chip executes the method and any combination of embodiments of the method.

[0010] In a fourth aspect, an embodiment of the invention provides a base station, comprising a processor configured to call and run a computer program stored in a memory, so that a device equipped with the processor executes the method.

[0011] The method may be programmed as computer-executable instructions stored in a non-transitory computer-readable medium. When the non-transitory computer-readable medium is loaded onto a computer, it directs the processor of the computer to execute the method.

[0012] The non-transitory computer-readable medium may include at least one of the following groups: a hard disk, a CD-ROM, an optical storage device, a magnetic storage device, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory, and a flash memory.

[0013] The method can be programmed as a computer program product to enable a computer to execute the method.

[0014] The method can be programmed as a computer program to make a computer execute the method. Beneficial Effects

[0015] In the 3GPP standard Rel-17, PRACH coverage enhancement has not been addressed and is identified as one of the bottleneck channels in the corresponding study. PRACH transmission is very important for many processes, such as initial access and beam failure recovery. In order to achieve better coverage performance, some enhancement methods are needed. The present invention proposes some coverage enhancement methods for PRACH channels, by which better coverage can be achieved. Random Access Channel (RACH) Opportunities (RO) can be configured and allocated to repetitions of PRACH transmissions from one or more terminal devices. RO can be shared between different UE types or separated by UE type. The base station can implicitly determine the number of repetitions from the one or more terminal devices based on the configured RO bundle or RO set selected by the terminal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or related technologies, the following drawings will be described in the embodiments and briefly introduced. Obviously, the drawings are only some embodiments of the present invention, and people with ordinary skills in the field can obtain other drawings based on these drawings without paying any prerequisites.

[0017] Figure 1 A schematic diagram of a telecommunication system is shown.

[0018] Figure 2A schematic diagram of an embodiment of a wireless communication method is shown.

[0019] Figure 3 An example schematic diagram of extending PRACH resources based on the time domain is shown.

[0020] Figure 4 An example schematic diagram of extending PRACH resources based on the time domain is shown. resource.

[0021] Figure 5 An example schematic diagram of frequency domain-based extended PRACH resources is shown.

[0022] Figure 6 An example schematic diagram of extending PRACH resources based on frequency domain and time domain is shown.

[0023] Figure 7 Shows an example diagram for configuring RO bundling.

[0024] Figure 8 An example schematic diagram showing multiple PRACH transmission modes with different time and frequency instances (ie, resources) is shown.

[0025] Fig. 9 An example schematic diagram showing multiple PRACH transmissions with inter-RO frequency hopping.

[0026] Fig.10 A schematic diagram of a wireless communication system according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail with reference to the accompanying drawings in combination with technical matters, structural features, implementation objectives and effects. Specifically, the terms in the embodiments of the present invention are only used for the purpose of describing the specific embodiments, rather than limiting the present invention.

[0028] The present invention relates to a wireless communication system, and in particular to coverage enhancement for uplink (UL) transmission. When the RACH opportunity resources of the enhanced UE are shared with the traditional UE, how does the gNB know whether the UE transmits multiple PRACHs? If there is a misunderstanding, the capacity will be reduced. Therefore, how to configure the resources for multiple PRACH transmissions is a problem. In addition, when the resources for the multiple PRACH transmissions are configured, during the initial access process, the gNB does not know any information about the UE in the cell. In order to avoid misunderstandings between the gNB and the UE, how the UE selects the resources for the multiple PRACHs or how to determine the starting RO of multiple PRACH transmissions of a UE also needs further study.

[0029] How to configure the resources for multiple PRACH transmissions requires further study. In addition, when the resources for multiple PRACH transmissions are configured, in order to avoid misunderstanding between the gNB and the UE, in some cases, how the UE selects the resources for multiple PRACHs or how to determine the starting RO for multiple PRACH transmissions of a UE will require further study.

[0030] PRACH is one of the coverage bottleneck channels evaluated in Rel-17 and needs to be further studied in the PRACH coverage enhancement standardization. In the current specification, for 4-step RACH, first, the UE sends a non-repeated RACH preamble on the RACH opportunity (RO), and the RO is configured by SIB1 or DCI. After the UE sends the RACH preamble, the RACH response window starts. If the UE does not receive a random access response (Random Access Response, RAR) during the RAR window or the initial transmission fails, the UE can perform a power-boosted retransmission and continue the initial access process. However, this approach will introduce a large delay. To overcome the problem, a direct approach is to enable multiple PRACH transmissions. However, in the current specification, PRACH transmission of legacy UEs (Rel-15~17) only supports a single PRACH transmission, and does not support multiple PRACH transmissions. Since the gNB does not know any coverage status of the UE during the initial access process, how to determine the number of repetitions needs further study. Therefore, determining the number of repetitions of the multiple PRACH transmissions based on the UE side and aligning them with the gNB, or determining them based on the gNB side, needs to be studied.

[0031] How to determine the number of repetitions of the PRACH transmission of the UE requires further study.

[0032] In the current specification, the time domain and frequency domain resources of the RO are indicated by system information. For time domain resources, one RO or multiple ROs can be configured for the UE in one PRACH time slot. For frequency domain resources, 1, 2, 4 or 8 frequency division multiplexed (FDMed) PRACH resources can be configured. When more than one resource is configured in the frequency domain, the resources are continuous in the frequency domain. If multiple PRACH transmissions are enabled, the PRACH repetition mode within the RACH period should be determined to avoid ambiguity between the gNB and the UE. A time domain priority mapping scheme or a frequency domain priority mapping scheme can be considered. In addition, frequency hopping is one of the suitable ways to improve coverage capabilities. How to consider frequency domain hopping on top of multiple PRACH transmissions also needs further study. In addition, when repetition is enabled, how the transmission power of each repetition is associated also needs further study.

[0033] How to support frequency hopping over multiple PRACH transmissions may be studied. In addition, the transmission power of each repetition may also be determined.

[0034] Some embodiments of the present invention provide a method for determining resources for multiple physical random access channel (PRACH) transmissions and rules for a user equipment (UE) or terminal device to determine the number of multiple PRACH transmissions. Note that the term UE can be interpreted as a terminal device or as defined by 3GPP. The term "resource" described in this article can be interpreted as a wireless resource in the time domain and the frequency domain. The wireless resource unit in the time domain can be referred to as a time instance, a time range, or a time entity. The wireless resource unit in the frequency domain can be referred to as a frequency instance, a frequency range, or a frequency entity. The term physical random access channel The term physical random access channel (PRACH) and the term random access channel (RACH) are used interchangeably. A PRACH transmission may include msgA, msg1, and msg3 in the uplink, and msgB, msg2, and msg4 in the downlink. Embodiments of the present invention may be applied to two-step or four-step random access. The frequency domain axis in the accompanying drawings is shown as f, and the time domain axis in the accompanying drawings is shown as t.

[0035] The resources for multiple PRACH transmissions for a class of UE types (e.g., UE types compliant with 3GPP Release 18) may be independent of the resources for a single PRACH transmission for a legacy UE type (e.g., UE types compliant with 3GPP Release 17, 16, 15 or earlier). The multiple PRACH transmissions may include different multiple PRACH transmissions or different repetitions of a PRACH transmission. Parameters for determining the resources for the multiple PRACH transmissions may be jointly encoded with the random access channel (RACH) resources (e.g., multiple RACH occasions (RO)). Some columns may be added to the random access configuration table of the current 3GPP standard to configure the parameters of the resources for the multiple PRACH transmissions.

[0036] In some embodiments, the resources used for multiple PRACH transmissions may be independent of the resources used for a single PRACH transmission, and a new set of random access configuration tables may be introduced to indicate the resources for multiple PRACH transmissions.

[0037] Resources for multiple PRACH transmissions can reuse the current architecture. In some embodiments, some additional parameters may be added in the random access configuration table or the system information block SIB1.

[0038] Some embodiments of the present invention provide a method for determining the transmission mode of multiple PRACH transmissions, referred to as multiple PRACH transmission modes.

[0039] The multiple PRACH transmission modes (referred to as PRACH repetition modes) are based on the time domain, and each RO for multiple PRACH transmissions may have different time and frequency instances (i.e., different time and frequency resources). In some embodiments, the resource block (RB) offset or frequency domain offset may be configured by the gNB in ​​a configuration message (e.g., SIB1 or DCI).

[0040] In some embodiments, frequency hopping between multiple PRACH transmissions is enabled, and the frequency hopping information may be indicated by SIB1 or downlink control information (DCI) format 1-0 or other types of control signaling. In some embodiments, the frequency hopping information may include at least one of the following parameters: frequency hopping offset, frequency hopping type, and frequency hopping function status (i.e., enabled or disabled).

[0041] Reference Figure 1 A telecommunication system including UE 10a, UE 10b, a base station (BS) 20a and a network entity device 30 performs the method according to an embodiment of the present invention. Figure 1For illustration only and not limitation, the system may include more UEs, BSs and core network (CN) entities. The connections between devices and device components are shown as lines and arrows in the figure. The UE 10a may include a processor 11a, a memory 12a and a transceiver 13a. The UE 10b may include a processor 11b, a memory 12b and a transceiver 13b. The base station 20a may include a processor 21a, a memory 22a and a transceiver 23a. The network entity device 30 may include a processor 31, a memory 32 and a transceiver 33. Each of the processors 11a, 11b, 21a and 31 may be configured to implement the functions, processes and / or methods proposed in the description herein. The layers of the wireless interface protocol may be implemented in the processors 11a, 11b, 21a and 31. Each of the memories 12a, 12b, 22a and 32 operatively stores a variety of programs and information to operate the connected processors. Each of the transceivers 13a, 13b, 23a and 33 is operatively coupled to a connected processor and transmits and / or receives wireless signals or wired signals. The UE 10a can communicate with the UE 10b via a side link. The base station 20a can be one of an eNB, a gNB or other types of wireless nodes, and can configure wireless resources for the UE 10a and the UE 10b.

[0042] Each of the processors 11a, 11b, 21a and 31 may include an Application-Specific Integrated Circuit (ASICs), other chipsets, logic circuits and / or data processing devices. Each of the memories 12a, 12b, 22a and 32 may include a Read-Only Memory (ROM), a Random Access Memory (RAM), a flash memory, a memory card, a storage medium and / or other storage devices. Each of the transceivers 13a, 13b, 23a and 33 may include a baseband circuit and a Radio Frequency (RF) circuit to process radio frequency signals. When the embodiments are implemented in software, the techniques described herein may be implemented by modules, processes, functions, entities, etc. that perform the functions described herein. The modules may be stored in a memory and executed by the processor. The memory may be implemented inside the processor or outside the processor, in which case they may be communicatively coupled to the processor in various ways known in the art.

[0043] The network entity device 30 may be a node in CN. CN may include Long Term Evolution (LTE) CN or 5G Core (5G Core, 5GC), including User Plane Function (UPF), Session Management Function (SMF), Access and Mobility Management Function (AMF), Unified Data Management (UDM), Policy Control Function (PCF), Control Plane (CP) / User Plane (UP) Separation (CUPS), Authentication Server (AUSF), Network Slice Selection Function (NSSF) and Network Exposure Function (NEF).

[0044] An example of a UE described herein may include one of the UE 10a or UE 10b. An example of a base station described herein may include the base station 20a. An uplink (UL) transmission of a control signal or data may be a transmission operation from a UE to a base station. A downlink (DL) transmission of a control signal or data may be a transmission operation from a base station to a UE. A DL control signal may include downlink control information (DCI) or a radio resource control (RRC) signal from a base station to a UE.

[0045] Reference Figure 2 , the terminal device 10 and the base station 20 perform an embodiment of the wireless communication method. An example of the terminal device 10 described in this document may include one of the UE 10a or the UE 10b. An example of the base station 20 described in this document may include the base station 20a.

[0046] The base station 20 sends a random access channel (RACH) timing configuration to the terminal device 10 in a configuration message 111, wherein the RACH timing (RO) configuration indicates a plurality of ROs (referred to as PRACH repetitions) of physical random access channel (PRACH) transmission repetitions of the terminal device (S11). The terminal device 10 receives the configuration message 111 carrying the RO configuration (S12). The terminal device 10 selects a plurality of ROs from the plurality of ROs indicated in the RACH timing configuration, and sends one or more PRACH repetitions 114 of the terminal device in the selected plurality of ROs (S14). The base station 20 receives one or more PRACH repetitions 114 of the terminal device 10 by monitoring the plurality of ROs indicated by the RACH timing configuration in the configuration message (S15).

[0047] For example, a portion of the terminal devices 10, such as UE 10a, may belong to a first UE type (e.g., a legacy UE type compliant with 3GPP Release 17, 16, 15 or earlier), and a portion of the terminal devices 10, such as UE 10b, may belong to a second UE type (e.g., a UE type compliant with 3GPP Release 18). The RO configuration indicates a plurality of ROs for a physical random access channel (PRACH) transmission of the first UE type and a plurality of ROs for repetitions (referred to as PRACH repetitions) of the PRACH transmission of the second UE type.

[0048] Some terminal devices 10 (e.g., UE 10a) select multiple ROs from the multiple ROs indicated in the RACH timing configuration, and send one or more PRACH transmissions of the terminal devices in the selected multiple ROs. Some terminal devices 10 (e.g., UE 10b) select multiple ROs from the multiple ROs indicated in the RACH timing configuration, and send one or more PRACH repetitions 114 of the terminal devices in the selected multiple ROs.

[0049] The base station 20 receives one or more PRACH transmissions of a first UE (eg, UE 10a) belonging to the first UE type and one or more PRACH repetitions of a second UE (eg, UE 10b) belonging to the second UE type by monitoring the RO indicated by the RACH opportunity configuration in the configuration message.

[0050] In some embodiments, the RACH timing configuration further indicates one or more reference ROs of the plurality of ROs for PRACH transmission of the first UE type, and the RACH timing configuration indicates that at least a portion of the plurality of ROs is used for the PRACH repetition of the terminal device as an extension of the plurality of ROs for PRACH transmission of the first UE type based on the one or more reference ROs. Examples are presented in the subsequent content.

[0051] In some embodiments, the RACH opportunity configuration further indicates one or more reference ROs for extending the RO resources of the multiple PRACH transmissions.

[0052] Embodiment 1:

[0053] The present invention proposes a method for supporting multiple PRACH transmissions with the same or multiple beams for RACH, and determining the resources (time domain and / or frequency domain resources or RACH sequence resources) of PRACH repetition to avoid misunderstanding between the gNB and the UE (i.e., asynchronous knowledge of the RO, PRACH repetition, frequency domain hopping, and other contents discussed in the description of this article). One potential solution is that the time domain and / or frequency domain resources of the RACH timing (RO) for multiple PRACH transmissions can be independent of the RACH timing indication for a single PRACH transmission. Another way is that all or part of the RACH timing is shared by multiple PRACH transmissions and a single PRACH transmission. A more detailed resource configuration method is needed to support multiple PRACH transmissions and a single PRACH transmission.

[0054] Furthermore, in some cases, when resources are predefined for multiple PRACH transmissions of different levels, it should be defined how the UE selects one of the resources of the multiple PRACH transmissions. In other words, it should be defined how to determine the number of repetitions of a PRACH transmission and the corresponding resources.

[0055] In order to determine resources for multiple PRACH transmissions, the following possible implementation methods may be considered.

[0056] A first possible implementation: The resources used for multiple PRACH transmissions are independent of the resources used for a single PRACH transmission. The parameters used to determine the resources for multiple PRACH transmissions are jointly encoded with the RACH resources. Some columns may be added to the random access configuration table to configure certain parameters of the resources for multiple PRACH transmissions, wherein the columns are used to indicate at least one of the following parameters: ●PRACH preamble format, x, y, subframe number, start symbol, number of time domain PRACH opportunities within a PRACH time slot, PRACH duration.

[0057] For example (taking FR1 and paired spectrum / supplementary uplink random access configuration as an example), some columns are added to the random access configuration table, and the parameters in the columns in the table determine the resources of multiple PRACH transmissions. For example, the parameters include: ●A PRACH format, a PRACH period, a system frame index used for PRACH in the period, the number of time slots, the starting symbol of the PRACH preamble, the number of ROs in the time slot, etc.

[0058] When the prach-ConfigurationIndex is indicated by the gNB in ​​a control message (such as SIB1 or DCI), the multiple PRACH transmission resources and the single PRACH transmission resource are configured, and all configured PRACH resources can be used for the terminal device 10 to transmit PRACH.

[0059] In some embodiments, the RACH sequence used for a single PRACH transmission is the same as the RACH sequence for multiple PRACH transmissions. In some embodiments, the RACH sequence used for a single PRACH transmission is different from the multiple PRACH transmissions.

[0060] In some embodiments, a group of RO bundles is configured, each RO bundle in the group has the same or different size, and each of the RO bundles contains multiple ROs. The bundling of the RO bundles can be based on the time domain, the frequency domain, or the time domain and the frequency domain. In some embodiments, the RACH timing configuration indicates the RO bundles of the multiple ROs for the PRACH repetitions of the terminal device, each of the RO bundles includes the multiple ROs for the PRACH repetitions of the terminal device, and the RO bundles are mutually exclusive RO sets.

[0061] In some embodiments, the system frames within the PRACH period may exceed 1. In some embodiments, the resources used for multiple PRACH transmissions are independent of the resources used for a single PRACH transmission. The parameters used to determine the resources for multiple PRACH transmissions are jointly encoded with the RACH resources (referred to as joint encoding), and some rows are added to the random access configuration table to configure certain parameters of the resources for multiple PRACH transmissions. At least one of the terminal devices 10 may indicate more than one prach-ConfigurationIndex value, one value being used to indicate the resources for the single PRACH transmission and another value being used to indicate the resources for the multiple PRACH transmissions.

[0062] Note that the multiple PRACH transmissions refer to PRACH transmissions with repetitions, and the single PRACH transmission refers to PRACH transmissions without repetitions.

[0063] A second possible implementation: resources for multiple PRACH transmissions are independent of resources for a single PRACH transmission. A new set of random access configuration tables is introduced to indicate resources for multiple PRACH transmissions. The new random access configuration table group includes at least one random access configuration table, and the random access configuration table is used for the scenarios of FR1 and paired spectrum / supplementary uplink, FR1 and non-paired spectrum, or FR2 and non-paired spectrum. The base station 20 (for example, through SIB1 or DCI) indicates two values, one value represents or indicates the resources for the single PRACH transmission, and the other value represents or indicates the resources for the multiple PRACH transmissions. For example, as shown in Table 1, the prach-ConfigurationIndex (configurable as an integer value from 0 to 255) indicates the resources for the single PRACH transmission, and the prach-ConfigurationIndex-r18 (configurable as an integer value from 0 to 255) indicates the resources for the multiple PRACH transmissions. The parameters may be shared by a single PRACH transmission of Rel.17 UEs and multiple PRACH transmissions of Rel.18 UEs. Table 1: RACH-ConfigGeneric information elements for single and multiple PRACH transmissions

[0064] In some embodiments, at least one of the following resource configuration parameters may be shared between a single PRACH transmission and multiple PRACH transmissions, the parameters being as follows: ●msg1-FDM; msg1-FrequencyStart; ·zeroCorrelationZoneConfig; ●preambleReceivedTargetPower; ●preambleTransMax; ●powerRampingStep; ●ra-ResponseWindow.

[0065] In some embodiments, at least one of the following resource configuration parameters may be different between a single PRACH transmission and multiple PRACH transmissions, the parameters being as follows: ●msg1-FDM; msg1-FrequencyStart; zeroCorrelationZoneConfig; ●preambleReceivedTargetPower; ●preambleTransMax; ●powerRampingStep; ●ra-ResponseWindow.

[0066] In some embodiments, a new random access configuration table is introduced to cooperate with the traditional random access configuration table, wherein the new random access configuration table is used to determine the resources of multiple PRACH transmissions, and the traditional random access configuration table is used to determine the resources of a single PRACH transmission (for example, for Rel-15 to 17). A prach-ConfigurationIndex can indicate the resources of a single PRACH transmission and multiple PRACH transmissions at the same time. For example, for each case (for example, FR1 and paired spectrum / supplemental uplink, FR1 and non-paired spectrum, or FR2 and non-paired spectrum), there is a traditional random access configuration table and a new random access configuration table. The new random access configuration table is associated with the traditional random access configuration table. When the prach-ConfigurationIndex indication is used, the prach-ConfigurationIndex is used to indicate the corresponding resources of a single and / or multiple PRACH transmissions.

[0067] In some embodiments, a group of RO bundles is configured, each RO bundle in the group has the same or different size, each RO bundle contains multiple ROs, and the bundling of the RO bundles can be based on the time domain, the frequency domain, or the time domain and the frequency domain.

[0068] A third possible implementation: the resources for multiple PRACH transmissions may reuse the current architecture, and some additional parameters, such as time domain extension, frequency domain extension, or time domain and frequency domain extension parameters, may be added to the random access configuration table or SIB1, which are used to extend the PRACH resources of the multiple PRACH transmissions based on the PRACH resources of the single PRACH transmission or based on a reference RO or a group of reference ROs. For example, the extended parameters may include at least the number of PRACH resources extended in addition to the PRACH resources of the single PRACH transmission. The extended resources may be based on time and / or frequency.

[0069] In some embodiments, the RACH timing configuration further indicates one or more reference ROs among the multiple ROs for PRACH transmission of the first UE type, and the RACH timing configuration indicates that at least a portion of the multiple ROs are used for the PRACH repetition of the terminal device as an extension of multiple ROs for PRACH transmission of the first UE type based on the one or more reference ROs.

[0070] In one embodiment, the time-based extended PRACH resource (referred to as the time-domain extended PRACH resource) is the PRACH resource with the same or different frequency, used for PRACH transmission, such as Figure 3 and Figure 4 For example, Figure 3 As shown, the configured traditional RO includes {RO1, RO2, RO3, RO4}, wherein the RO3 is configured as a reference RO. The number of the time domain extended PRACH resources is 4, then the extended RO includes {ROi, ROi+1, ROi+2, ROi+3}, represented as a group of extended ROs. Each RO in the extended RO group has a different time instance. In one embodiment, the traditional RO can be configured only for a single PRACH transmission. Alternatively, the traditional RO can be configured to be shared only by a single PRACH transmission and multiple PRACH transmissions of the terminal device 10.

[0071] For example, Figure 4 As shown, the configured conventional RO includes {RO1, RO2, RO3, RO4}, and the RO3 and RO4 are configured as reference ROs. The number of the time-based extended PRACH resources is 4. The extended RO includes {ROi, ROi+1, ROi+2, ROi+3, ROi+4, ROi+5, ROi+6, ROi+7}, which are represented as the extended RO group. Each RO in the extended RO group has different or the same time instances.

[0072] The frequency-based extended resources are the PRACH resources with the same or different time instances, used for PRACH transmission, such as Figure 5 For example, Figure 5As shown, the configured conventional RO includes {RO1, RO2, RO3, RO4}, and the RO1 and RO2 are configured as reference ROs. The number of the frequency-extended PRACH resources is 4. The extended RO includes {ROi, ROi+1, ROi+2, ROi+3, ROi+4, ROi+5, ROi+6, ROi+7}, which are represented as the extended RO group. Each RO in the extended RO group has a different or the same frequency instance. In some embodiments, multiple reference ROs are required for the frequency-based extended PRACH resources, and at least two of the reference ROs have different time instances.

[0073] Frequency and time based extended resources are PRACH resources with the same or different time instances and the same or different frequency instances for PRACH transmission. Figure 6 As shown, the configured conventional RO includes {RO1, RO2, RO3, RO4}, and the RO3 is configured as a reference RO. The number of the time domain extended PRACH resources is 4, and the number of the frequency extended PRACH resources is 4. The extended RO includes {ROi, ROi+1, ROi+2, ROi+3, ROi+4, ROi+5, ROi+6, ROi+7, ROi+9, ROi+10, ROi+11, ROi+12, ROi+13, ROi+14, ROi+15}, which are represented as the extended RO group. Each RO in the extended RO group has different or the same frequency instances and different or the same time instances.

[0074] In some embodiments, the extended resource of the PRACH is based on the last or first RO in a set of ROs (referred to as an RO set) of the single PRACH transmission, or the RO with the largest index.

[0075] In some embodiments, the extended PRACH resources based on the PRACH resources (ie, RO) of the single PRACH transmission can only be used for multiple PRACH transmissions, and the RACH sequence used for multiple PRACH transmissions may be the same as or different from the RACH sequence used for the single PRACH transmission.

[0076] In some embodiments, a group of RO bundles is configured, each RO bundle in the group has the same or different size, and each RO bundle contains multiple ROs. The bundling of the RO bundle can be based on the time domain, the frequency domain, or the time domain and the frequency domain. In some embodiments, each RO in the RO bundle has the same or different time instance and / or the same or different frequency domain instance.

[0077] In addition, when the RO resources are configured, it is necessary to define how the UE selects a group of ROs for multiple PRACH transmissions and how the base station and the UE reach a consistent understanding, which will be described in detail in the subsequent content. The base station 20 configures a set of PRACH sequences (for example, As predefined or indicated by SIB1 or DCI), used for multiple PRACH transmissions, each group of PRACH sequences is associated with a specific PRACH repetition number of the terminal device. The number of the plurality of PRACH transmissions may be determined based on the RSRP-SSB set. RSRP represents Reference Signal Received Power (SSB) stands for Synchronization Signal Block (SSB). The number of the plurality of PRACH transmissions may be determined based on the resources of the RO. A set of RO bundles is set / determined. If the terminal device 10 (eg, UE 10b) selects one of the RO bundles, the number of the multiple PRACH transmissions is equal to the size of the RO bundle. Figure 7 As shown. The base station 20 is configured with three RO bundles, wherein the RO bundle B1 includes {ROi, ROi+1}, the RO bundle B2 includes {ROi+2, ROi+3}, and the RO bundle B3 includes {ROi+4, ROi+5, ROi+6, ROi+7}. When the UE 10b selects the RO bundle B3 for multiple PRACH transmissions, the number of PRACH repetitions is equal to 4. The base station 20 may determine that the number of PRACH repetitions is equal to 4 according to the number of ROs in the selected RO bundle B3.

[0078] The terminal device 10 determines that the number of PRACH repetitions in the one or more PRACH repetitions of the terminal device 10 (e.g., UE 10b) belonging to the second UE type is equal to the size of the RO bundle selected by the terminal device for transmitting the one or more PRACH repetitions of the terminal device, and the size of the RO bundle is the number of ROs in the selected RO bundle. The terminal device 10 (e.g., UE 10b) transmits two PRACH repetitions in two selected multiple ROs when the number of multiple ROs selected by the terminal device 10 is 2, and transmits three PRACH repetitions in three selected multiple ROs when the number of multiple ROs selected by the terminal device 10 is 3, and so on. In the scheme of implicitly determining the number of PRACH repetitions, the base station 20 determines that the number of PRACH repetitions in the one or more PRACH repetitions of the terminal device 10 (e.g., UE 10b) belonging to the second UE type is equal to the size of the RO bundle selected by the terminal device for transmitting the one or more PRACH repetitions of the terminal device, and the size of the RO bundle is the number of ROs in the selected RO bundle.

[0079] In some embodiments, the multiple PRACH transmissions cannot cross the boundary of the RO bundle. In some embodiments, the multiple PRACH transmissions can cross the boundary of the RO bundle.

[0080] Figure 7 It shows a UE selecting a specific RO bundle from multiple configured RO bundles.

[0081] In some embodiments, for contention free random access (CFRA), the number of the multiple PRACH transmissions is indicated by trigger signaling. A column is added to the random access configuration table to indicate the number of PRACH repetitions. Alternatively, a new field may be added to the trigger signaling to indicate the number of the multiple PRACH transmissions.

[0082] Embodiment 2:

[0083] Some embodiments of the present invention propose a method for determining the pattern (including time domain and / or frequency domain) of multiple PRACH transmissions. The pattern of multiple PRACH transmissions needs to be determined to avoid misunderstandings between the gNB and the UE regarding PRACH repetition. PRACH resources based only on the time domain can be considered, with the same or different frequency resources, for multiple PRACH transmissions. In addition, in order to further improve the coverage enhancement, frequency domain hopping of multiple PRACH transmissions can be adopted. Examples are described in detail in the subsequent content.

[0084] The first possible implementation: the pattern of the multiple PRACH transmissions (called the PRACH repetition pattern) is configured by the base station 20 for the multiple PRACH transmissions based on the time domain. The pattern of the multiple PRACH transmissions includes multiple ROs for multiple PRACH transmissions. In the pattern of multiple PRACH transmissions, each RO for multiple PRACH transmissions has a different time and frequency instance (i.e., resource), and the resource block (RB) offset or frequency domain offset is configured by the base station 20 (e.g., in SIB1 or DCI). The frequency resource of the RO is determined based on the RB offset or frequency offset value and the most recent previous RO. The starting frequency resource of the RO with index i (expressed as ROi_startRB) can be expressed as: ROi_startRB=ROi-1_endRB+RB_offset value, wherein the ROi-1_endRB represents the bundled RB of the ROi-1, and the RB_offset value represents the RB offset or frequency domain offset.

[0085] The indexes of the multiple ROs of the multiple repetitions for one PRACH transmission are sorted based on the start time (eg, start symbol or time slot) of the RO. The earlier the start time of the RO, the smaller the index of the RO.

[0086] For example, Figure 8 As shown, the number of the multiple PRACH transmissions is 4, and the indexes of the four ROs are 1 to 4. Specifically, the RO with the earliest start time among the four ROs is RO1, the RO with the second earliest start time among the four ROs is RO2, the RO with the third earliest start time among the four ROs is RO3, and the RO with the fourth earliest start time among the four ROs is RO4. At least one of the terminal devices 10, such as UE 10b, repeatedly transmits four PRACH repetitions on {RO1, RO2, RO3, RO4}. In some embodiments, the RACH timing configuration indicates the resource block (RB) offset (expressed as a variable RB_offset) of the multiple ROs indicated in the RACH timing configuration, and any two adjacent ROs in the selected RO set are separated by an RB offset in the frequency domain. The starting frequency of RO2 (i.e., the starting RB) is: RO2_startRB=RO1_endRB+RB_offset.

[0087] The starting frequency of RO3 is: RO3_startRB=RO2_endRB+RB_offset.

[0088] The starting frequency of RO4 is: RO4_startRB=RO3_endRB+RB_offset.

[0089] In some embodiments, the frequency resource of the RO is calculated and obtained based on the RB offset or frequency offset value and the most recent previous RO. The starting frequency resource of the RO can be expressed as: ROi_startRB=ROi-1_startRB+RB_offset value, where ROi-1_startRB represents the starting RB of ROi-1.

[0090] In some embodiments, the first RO of the multiple ROs for multiple repetitions of a PRACH transmission does not need the frequency offset to calculate the starting frequency of the first RO. In some embodiments, the frequency resources of a group of ROs for multiple repetitions of a PRACH transmission are the same, and the frequency offset is applied to every two adjacent RO sets. The RO set (referred to as an RO set) can be configured or predefined by the base station 20. Each RO set can be grouped into a hop.

[0091] A second possible implementation: the frequency domain hopping of the multiple PRACH transmissions (referred to as the frequency domain hopping function) is enabled, and the frequency domain hopping information is indicated by the base station 20 in a control signal or control message, such as system information block (SIB) SIB1 or DCI format 1-0 or other signaling. The frequency domain hopping information includes one or more of the following parameters: ● Frequency hopping offset in frequency domain, ● Frequency hopping type in frequency domain, ●Frequency domain hopping function status.

[0092] The frequency domain hopping function status indicates whether frequency domain hopping is enabled or disabled for multiple PRACH transmissions of the terminal device 10 (eg, UE 10b). The frequency domain hopping offset is the frequency domain offset between two adjacent hops in the frequency domain hopping function.

[0093] The frequency domain hopping type reflects the time domain unit of each hop in the frequency domain hopping function. Each hop may include one or more ROs. The frequency domain hopping type shows which time unit each hop in the frequency domain hopping function is organized. The frequency domain hopping type may include at least one of the following: ● Frequency hopping within a time slot, ● Frequency hopping between time slots, ●Inter-RO frequency hopping, ●Frequency hopping between RO sets.

[0094] When the frequency domain hopping type indicates intra-time slot hopping, two adjacent ROs in different sub-time slot units belong to different hops, and a hop in the frequency domain hopping function includes a frequency range and one or more ROs in a sub-time slot unit. The sub-time slot unit can be a mini-slot or an orthogonal frequency division multiplexing (OFDM) symbol.

[0095] When the frequency domain hopping type indicates the inter-time slot hopping, two adjacent ROs in different time slots belong to different hoppings, and a hopping in the frequency domain hopping function includes one or more ROs in a frequency range and a time slot unit. The time slot unit may include one or more time slots.

[0096] When the frequency domain hopping type indicates the inter-RO hopping, two adjacent ROs belong to different hoppings, and a hopping in the frequency domain hopping function includes one or more ROs in a frequency range and an RO-based time range. The RO-based time range may include one or more ROs.

[0097] When the frequency domain hopping type indicates the inter-RO set hopping, two adjacent RO sets belong to different hoppings, and a hopping in the frequency domain hopping function includes one or more RO sets in a frequency range and a time range based on an RO set. The time range based on an RO set may include one or more RO sets.

[0098] Specifically, the inter-RO frequency hopping means that two adjacent ROs with multiple PRACH transmissions belong to different hops. Fig. 9 As shown, the number of the multiple PRACH transmissions is 4, and the corresponding ROs are represented as {RO1, RO2, RO3, RO4}. RO1 and RO3 belong to hop 1, and RO2 and RO4 belong to hop 2. Each hop in the frequency domain hopping function includes multiple ROs allocated in the same frequency instance and different time instances. In one embodiment, each hop in the frequency domain hopping function includes one or more RO bundles allocated in the same frequency instance and different time instances. Alternatively, each hop in the frequency domain hopping function includes one or more RO sets allocated in the same frequency instance and different time instances. There is a frequency domain offset between ROi and ROi+1, where i={1,2,3}. In some embodiments, the RACH opportunity configuration indicates the resource block (RB) offset of the hop indicated in the RACH opportunity configuration, and any two adjacent hops are separated by one RB offset in the frequency domain.

[0099] In some embodiments, the transmission beam of each RO within the plurality of ROs for the plurality of PRACH transmissions may be different or the same. In some embodiments, among the plurality of ROs indicated in the RACH timing configuration, each RO is associated with a beam and a transmission power. The transmission power associated with each RO within the plurality of ROs for the plurality of PRACH transmissions may be different, and the power boost step (denoted as power_step) value is configured by the base station 20. The transmission power of the beam of the RO with index i (denoted as a variable ROi_TxPow) is obtained by adding the power boost step to the transmission power of the beam of another RO with index i-1 (denoted as a variable ROi-1_TxPow), where i is an integer variable.

[0100] For example, the transmission power associated with one RO is determined by: ROi_TxPow=ROi-1_TxPow+power_step, where ROi_TxPow is the transmit power of the RO with index i, ROi-1_TxPow is the transmission power of the RO with index i-1.

[0101] In some embodiments, the transmission beams of each RO set within the multiple PRACH transmissions may be different or the same. The RO set is configured or predefined by the gNB 20, and the set includes multiple ROs. In some embodiments, among the multiple ROs indicated in the RACH timing configuration, each RO set is associated with a beam and a transmission power. In some embodiments, the transmission power of each RO set within the multiple PRACH transmissions may be different, and the power boost step (denoted as power_step) value is configured by the base station 20. The transmission power of the beam of the RO set with index i (denoted as a variable RO_seti_TxPow) is obtained by adding the power boost step to the transmission power of the beam of another RO set with index i-1 (denoted as a variable RO_seti-1_TxPow), where i is an integer variable.

[0102] For example, the transmission power of a RO is determined by: RO_seti_TxPow = RO_seti-1_TxPow+power_step, where RO_seti_TxPow is the transmission power of the RO set with index i, and RO_seti-1_TxPow is the transmission power of the RO set with index i-1.

[0103] The RO set may be configured or predefined by gNB 20. An RO set includes multiple ROs.

[0104] Fig.10 7 is a block diagram of an exemplary system 700 for wireless communication according to an embodiment of the present invention. The embodiments described herein may be implemented into the system using any suitably configured hardware and / or software. Fig.10 The system 700 is shown, including a radio frequency (RF) circuit 710, a baseband circuit 720, a processing unit 730, a memory / storage 740, a display 750, a camera 760, a sensor 770, and an input / output (I / O) interface 780, which are coupled to each other as shown.

[0105] The processing unit 730 may include circuits such as, but not limited to, one or more single-core or multi-core processors. The processor may include any combination of general-purpose processors and special-purpose processors (e.g., graphics processors and application processors). The processor may be coupled to the memory / storage and configured to execute instructions stored in the memory / storage to enable various applications and / or operating systems running on the system.

[0106] The baseband circuit 720 may include circuits, such as but not limited to one or more single-core or multi-core processors. The processor may include a baseband processor. The baseband circuit may handle various wireless control functions for communicating with one or more wireless networks through the RF circuit. The wireless control functions may include but are not limited to signal modulation, encoding, decoding, radio frequency shifting, etc. In some embodiments, the baseband circuit may provide compatible communications with one or more wireless technologies. For example, in some embodiments, the baseband circuit may support communications with 5G New Radio (NR), LTE, Evolved Universal Terrestrial Radio Access Network (EUTRAN) and other wireless metropolitan area networks (WMAN), wireless local area networks (WLAN), and wireless personal area networks (WPAN). An embodiment in which the baseband circuit is configured to support wireless communications of multiple wireless protocols may be referred to as a multimode baseband circuit. In various embodiments, the baseband circuit 720 may include circuits for processing signals that are not strictly considered to be baseband frequencies. For example, in some embodiments, the baseband circuit may include circuits for processing signals having an intermediate frequency between a baseband frequency and a radio frequency.

[0107] The RF circuit 710 may enable communication with a wireless network using modulated electromagnetic radiation through a non-solid medium. In various embodiments, the RF circuit may include switches, filters, amplifiers, etc. to facilitate communication with the wireless network. In various embodiments, the RF circuit 710 may include circuits for processing signals that are not strictly considered to be radio frequencies. For example, in some embodiments, the RF circuit may include circuits for processing signals having intermediate frequencies between baseband frequencies and radio frequencies.

[0108] In various embodiments, the transmitter circuit, control circuit or receiver circuit discussed above regarding the UE, eNB or gNB may be embodied in whole or in part in one or more of the RF circuit, the baseband circuit and / or the processing unit. As used herein, "circuit" may refer to, be or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated or group) and / or a memory (shared, dedicated or group), which executes one or more software or firmware programs, combinational logic circuits and / or other appropriate hardware components that provide the described functionality. In some embodiments, the electronic device circuit may be implemented in one or more software or firmware modules, or the functions associated with the circuit may be implemented by one or more software or firmware modules. In some embodiments, part or all of the components of the baseband circuit, the processing unit and / or the memory / storage may be implemented together on a chip system (system on a chip, SOC).

[0109] The memory / storage 740 may be used to load and store data and / or instructions, for example, for the system. The memory / storage may include any combination of suitable volatile memory (e.g., dynamic random access memory (DRAM)) and / or non-volatile memory (e.g., flash memory) in one embodiment. In various embodiments, the I / O interface 780 may include one or more user interfaces designed to enable user interaction with the system, and / or peripheral component interfaces designed to enable peripheral components to interact with the system. User interfaces may include, but are not limited to, physical keyboards or keypads, touch pads, speakers, microphones, etc. Peripheral component interfaces may include, but are not limited to, non-volatile memory ports, universal serial bus (USB) ports, audio jacks, and power interfaces.

[0110] In various embodiments, the sensor 770 may include one or more sensing devices to determine environmental conditions and / or location information associated with the system. In some embodiments, the sensor may include, but is not limited to, a gyroscope sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit. The positioning unit may also be part of the baseband circuit and / or the RF circuit, or interact with it to communicate with components of a positioning network (e.g., a global positioning system (GPS) satellite). In various embodiments, the display 750 may include a display, such as a liquid crystal display and a touch screen display. In various embodiments, the system 700 may be a mobile computing device, such as, but not limited to, a notebook computing device, a tablet computing device, a netbook, an ultrabook, a smart phone, etc. In various embodiments, the system may have more or fewer components and / or different architectures. Where appropriate, the methods described herein may be implemented as computer programs. The computer program may be stored on a storage medium, such as a non-transient storage medium.

[0111] The described embodiments of the present invention are a combination of techniques / processes that can be adopted in the 3GPP specifications to create a final product.

[0112] It is understood by those of ordinary skill in the art that each of the units, algorithms, and steps described and disclosed in the embodiments of the present invention are implemented using electronic hardware or a combination of computer software and electronic hardware. Whether the function is run on hardware or software depends on the conditions of the application and the design requirements of the technical solution. Those of ordinary skill in the art may implement the function in different ways for each specific application, but such implementation should not exceed the scope of the present invention. It is understood by those of ordinary skill in the art that since the working processes of the systems, devices, and units of the above-mentioned embodiments are basically the same, he / she can refer to the working processes of the systems, devices, and units. For ease of description and brevity, these working processes are not described in detail.

[0113] It is understood that the systems, devices and methods disclosed in the embodiments of the present invention can be implemented in other ways. The above embodiments are exemplary only. The division of the units is based only on logical functions, and there are other division methods in the implementation. Multiple units or components may be combined or integrated into another system. Certain features may also be omitted or skipped. On the other hand, the mutual coupling, direct coupling or communication coupling shown or discussed is operated indirectly or in a communication manner through some ports, devices or units in an electrical, mechanical or other form.

[0114] The units described as separate components may or may not be physically separate. The units used for display may or may not be physical units, i.e. located in one place or distributed over multiple network units. Some or all of the units are used according to the purpose of the embodiment. In addition, each of the functional units in each of the embodiments may be integrated into a processing unit, physically independent, or two or more units may be integrated into a processing unit.

[0115] If the software functional unit is implemented and used and sold as a product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution proposed by the present invention can be essentially or partially implemented in the form of the software product. Alternatively, a part of the technical solution that is beneficial to the conventional technology can be implemented in the form of the software product. The computer software product is stored in a storage medium and includes multiple commands for causing a computing device (such as a personal computer, a server, or a network device) to run all or part of the steps disclosed in the embodiment of the present invention. The storage medium includes a USB disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a floppy disk, or other medium capable of storing program code.

[0116] An embodiment of the present invention provides a wireless communication method performed by a base station, comprising: sending a random access channel (RACH) timing configuration in a configuration message, wherein the RACH timing (RO) configuration indicates a RO of a physical random access channel (PRACH) transmission of a first user equipment (UE) type and multiple ROs of repetitions (referred to as PRACH repetitions) of PRACH transmissions of a second UE type; receiving one or more PRACH transmissions of a first UE belonging to the first UE type and one or more PRACH repetitions of a second UE belonging to the second UE type by monitoring the RO indicated by the RACH timing configuration in the configuration message.

[0117] The configuration message is a system information block SIB1 or downlink control information (DCI).

[0118] The RACH timing configuration indicates a plurality of ROs for PRACH transmission of a first UE type, and the terminal device belongs to a second UE type. The RACH timing configuration further indicates one or more reference ROs of the plurality of ROs for PRACH transmission of the first UE type. The RACH timing configuration indicates that at least a portion of the plurality of ROs are used for the PRACH repetition of the terminal device as an extension of the plurality of ROs for PRACH transmission of the first UE type based on the one or more reference ROs.

[0119] The RACH timing configuration indicates an RO bundle of PRACH repetitions for the terminal device in the multiple ROs, each of the RO bundles includes multiple ROs of the PRACH repetitions for the terminal device, and the RO bundles are mutually exclusive RO sets. The base station determines that the number of PRACH repetitions in the one or more PRACH repetitions of the terminal device belonging to the second UE type is equal to the size of the RO bundle selected by the terminal device for transmitting the one or more PRACH repetitions of the terminal device, and the size of the RO bundle is the number of ROs in the selected RO bundle.

[0120] In some embodiments, the RACH timing configuration indicates frequency domain hopping information of a frequency domain hopping function of the terminal device, and the frequency domain hopping information includes one or more of a frequency domain hopping offset, a frequency domain hopping type, and a frequency domain hopping function status.

[0121] The frequency domain hopping offset is the frequency domain offset between two adjacent hops in the frequency domain hopping function. The frequency domain hopping type reflects the time domain unit of each hop in the frequency domain hopping function, and each hop may include one or more ROs. The frequency domain hopping function status shows whether the frequency domain hopping function is enabled or disabled.

[0122] While the present invention has been described in connection with what are presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments but is intended to cover various arrangements made without departing from the scope of the broadest interpretation of the appended claims.

Claims

1. A wireless communication method performed by a base station, comprising: Sending a random access channel RACH opportunity configuration in at least one configuration message, wherein the RACH opportunity (RO) configuration is used for repetition of a physical random access channel PRACH transmission of a terminal device, referred to as a PRACH repetition; and One or more PRACH repetitions of the terminal device are received by monitoring a plurality of ROs indicated by the RACH opportunity configuration in the configuration message. 2 . The wireless communication method according to claim 1 , wherein the configuration message is a system information block SIB1 or downlink control information DCI.

3. The wireless communication method according to claim 1, wherein the RACH opportunity configuration indicates a plurality of ROs for PRACH transmission of a first user equipment type, and the terminal device belongs to a second user equipment type; The RACH opportunity configuration further indicates one or more reference ROs of the plurality of ROs for PRACH transmission of the first user equipment type; and The RACH opportunity configuration indicates that at least a portion of the plurality of ROs are used for the PRACH repetition of the terminal device as an extension of the plurality of ROs for PRACH transmission of the first user equipment type based on the one or more reference ROs.

4. A wireless communication method as described in any one of claims 1 to 3, wherein the RACH timing configuration indicates an RO bundle of the multiple ROs for PRACH repetitions of the terminal device, each of the RO bundles includes multiple ROs of the multiple ROs for PRACH repetitions of the terminal device, and the RO bundle is a mutually exclusive RO set.

5. The wireless communication method according to claim 4, wherein the base station determines a PRACH in the one or more PRACH repetitions of the terminal device belonging to the second user equipment type. The number of repetitions is equal to the size of the RO bundle selected by the terminal device for transmitting the one or more PRACH repetitions of the terminal device, and the size of the RO bundle is the number of ROs in the selected RO bundle.

6. The wireless communication method according to claim 1, wherein the RACH timing configuration indicates a resource block (RB) offset of the plurality of ROs indicated in the RACH timing configuration, and any two adjacent ROs in the selected RO set are separated by one RB offset in the frequency domain.

7. The wireless communication method according to claim 1, wherein the RACH opportunity configuration indicates frequency domain frequency hopping information of a frequency domain frequency hopping function of the terminal device, and the frequency domain frequency hopping information includes one or more of a frequency domain frequency hopping offset, a frequency domain frequency hopping type, and a frequency domain frequency hopping function state; wherein the frequency domain hopping offset is a frequency domain offset between two adjacent hops in the frequency domain hopping function; The frequency domain hopping type reflects the time domain unit of each hop in the frequency domain hopping function, and each hop may include one or more ROs; and The frequency domain hopping function status displays whether the frequency domain hopping function is enabled or disabled.

8. The wireless communication method of claim 7, wherein each hop in the frequency domain hopping function includes a plurality of ROs allocated in the same frequency instance and different time instances.

9. The wireless communication method of claim 7, wherein each hop in the frequency domain hopping function includes one or more RO bundles allocated in the same frequency instance and different time instances.

10. The wireless communication method of claim 1, wherein each of the plurality of ROs indicated in the RACH opportunity configuration is associated with one beam and one transmission power.

11. The wireless communication method of claim 10, wherein the transmission power of a beam having an RO with index i is obtained by adding a power boost step to the transmission power of a beam of another RO with index i-1, and i is an integer variable.

12. The wireless communication method of claim 1, wherein each RO set of the plurality of ROs indicated in the RACH opportunity configuration is associated with one beam and one transmission power.

13. The wireless communication method of claim 12, wherein the transmission power of a beam having an RO set indexed as i is obtained by adding a power boost step to the transmission power of a beam having another RO set indexed as i-1, and i is an integer variable.

14. The wireless communication method as claimed in claim 1, wherein the base station configures a group of PRACH sequences for the terminal device for multiple PRACH transmissions, and each group of PRACH sequences is associated with a specific PRACH repetition number of the terminal device.

15. A base station, comprising: A processor configured to call and run a computer program stored in a memory so that a device equipped with the processor executes the method according to any one of claims 1 to 14.

16. A chip, comprising: A processor configured to call and run a computer program stored in a memory so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 14.

17. A computer-readable storage medium having a computer program stored therein, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 14.

18. A computer program product comprising a computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 14.

19. A computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 14.

20. A wireless communication method performed by a terminal device, comprising: Receiving a random access channel (RACH) opportunity configuration in at least one configuration message, wherein the RACH opportunity (RO) configuration is for a repetition of a physical random access channel (PRACH) transmission of the terminal device, referred to as a PRACH repetition; Selecting a plurality of ROs from a plurality of ROs indicated by the RACH opportunity configuration in the configuration message; and One or more PRACH repetitions of the terminal device are transmitted in the selected plurality of ROs.

21. The wireless communication method according to claim 20, wherein the configuration message is a system information block SIB1 or downlink control information DCI.

22. The wireless communication method of claim 20, wherein the RACH opportunity configuration indicates a plurality of ROs for PRACH transmission of a first user equipment type, and the terminal device belongs to a second user equipment type; The RACH opportunity configuration further indicates one or more reference ROs of the plurality of ROs for PRACH transmission of the first user equipment type; and The RACH opportunity configuration indicates that at least a portion of the plurality of ROs are used for the PRACH repetition of the terminal device as an extension of the plurality of ROs for PRACH transmission of the first user equipment type based on the one or more reference ROs.

23. The wireless communication method according to any one of claims 20 to 22, wherein the RACH The timing configuration indicates an RO bundle of the multiple ROs used for the PRACH repetition of the terminal device, each of the RO bundles includes multiple ROs of the multiple ROs used for the PRACH repetition of the terminal device, and the RO bundle is a mutually exclusive RO set.

24. A wireless communication method as described in claim 23, wherein the terminal device determines that the number of PRACH repetitions in the one or more PRACH repetitions of the terminal device belonging to the second user equipment type is equal to the size of the RO bundle selected by the terminal device for transmitting the one or more PRACH repetitions of the terminal device, and the size of the RO bundle is the number of ROs in the selected RO bundle.

25. The wireless communication method of claim 24, wherein the RACH timing configuration indicates a resource block (RB) offset of the plurality of ROs indicated in the RACH timing configuration, and any two adjacent ROs in the selected RO set are separated by one RB offset in the frequency domain.

26. The wireless communication method according to claim 24, wherein the RACH opportunity configuration indicates frequency domain frequency hopping information of a frequency domain frequency hopping function of the terminal device, the frequency domain frequency hopping information comprising one or more of a frequency domain frequency hopping offset, a frequency domain frequency hopping type, and a frequency domain frequency hopping function state; wherein the frequency domain hopping offset is a frequency domain offset between two adjacent hops in the frequency domain hopping function; The frequency domain hopping type reflects the time domain unit of each hop in the frequency domain hopping function, and each hop may include one or more ROs; and The frequency domain hopping function status displays whether the frequency domain hopping function is enabled or disabled.

27. The wireless communication method of claim 26, wherein each hop in the frequency domain hopping function includes a plurality of ROs allocated in the same frequency instance and different time instances.

28. The wireless communication method of claim 26, wherein each hop in the frequency domain hopping function includes one or more RO bundles allocated in the same frequency instance and different time instances.

29. The wireless communication method of claim 20, wherein each of the plurality of ROs indicated in the RACH opportunity configuration is associated with one beam and one transmission power.

30. The wireless communication method of claim 29, wherein the transmission power of a beam having an RO with index i is obtained by adding a power boost step to the transmission power of a beam of another RO with index i-1, i being an integer variable.

31. The wireless communication method of claim 20, wherein each RO set of the plurality of ROs indicated in the RACH opportunity configuration is associated with one beam and one transmission power.

32. The wireless communication method of claim 20, wherein the transmission power of a beam having an RO set indexed as i is obtained by adding a power boost step to the transmission power of a beam having another RO set indexed as i-1, and i is an integer variable.

33. The wireless communication method of claim 20, wherein a group of PRACH sequences is used for multiple PRACH transmissions of the terminal device, and each group of PRACH sequences is associated with a specific PRACH repetition number of the terminal device.

34. A wireless communication method as described in claim 20, wherein the terminal device determines the number of PRACH repetitions of the terminal device based on a set of reference signal received power synchronization signal blocks (RSRP-SSBs).

35. A terminal device, comprising: A processor configured to call and run a computer program stored in a memory so that a device equipped with the processor executes the method according to any one of claims 20 to 34.

36. A chip, comprising: The processor is configured to call and run the computer program stored in the memory so that the device equipped with the chip executes the method according to any one of claims 20 to 34.

37. A computer-readable storage medium having a computer program stored therein, the computer program causing a computer to execute the method according to any one of claims 20 to 34.

38. A computer program product comprising a computer program, the computer program causing a computer to execute the method according to any one of claims 20 to 34.

39. A computer program, wherein the computer program causes a computer to perform the method according to any one of claims 20 to 34.

40. A base station, comprising: Transceiver; Memory; A processor is electrically connected to the transceiver and the memory and is configured to execute a wireless communication method, the method comprising: Sending a random access channel RACH opportunity configuration in at least one configuration message, wherein the RACH opportunity (RO) configuration is used for repetition of a physical random access channel PRACH transmission of a terminal device, referred to as a PRACH repetition; and One or more PRACH repetitions of the terminal device are received by monitoring a plurality of ROs indicated by the RACH opportunity configuration in the configuration message.

41. The base station according to claim 40, wherein the configuration message is a system information block SIB1 or downlink control information DCI.

42. The base station of claim 40, wherein the RACH opportunity configuration indicates a plurality of ROs for PRACH transmission of a first user equipment type, and the terminal device belongs to a second user equipment type; the RACH opportunity configuration further indicates one or more reference ROs of the plurality of ROs for PRACH transmission of the first user equipment type; and The RACH opportunity configuration indicates that at least a portion of the plurality of ROs are used for the PRACH repetition of the terminal device as an extension of the plurality of ROs for PRACH transmission of the first user equipment type based on the one or more reference ROs.

43. A terminal device, comprising: Transceiver; Memory; A processor is electrically connected to the transceiver and the memory and is configured to execute a wireless communication method, the method comprising: Receiving a random access channel (RACH) opportunity configuration in at least one configuration message, wherein the RACH opportunity (RO) configuration is for a repetition of a physical random access channel (PRACH) transmission of the terminal device, referred to as a PRACH repetition; Selecting a plurality of ROs from a plurality of ROs indicated by the RACH opportunity configuration in the configuration message; and One or more PRACH repetitions of the terminal device are transmitted in the selected plurality of ROs.

44. The terminal device as claimed in claim 43, wherein the configuration message is system information block SIB1 or downlink control information DCI.

45. The terminal device of claim 43, wherein the RACH opportunity configuration indicates a plurality of ROs for PRACH transmissions of a first user equipment type, the terminal device belonging to a second user equipment type; The RACH opportunity configuration further indicates one or more reference ROs of the plurality of ROs for PRACH transmission of the first user equipment type; and The RACH opportunity configuration indicates that at least a portion of the plurality of ROs are used for the PRACH repetition of the terminal device as an extension of the plurality of ROs for PRACH transmission of the first user equipment type based on the one or more reference ROs.

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