WO2024207384A1 - Random access type determination method and apparatus - Google Patents

Abstract

Embodiments of the present disclosure provide a random access type determination method and apparatus, which are applied to a user equipment (UE). The method comprises: for a random access channel (RACH) attempt in a random access procedure, under the condition that a predetermined event occurs, determining to use multiple physical random access channel (PRACH) transmissions or a single PRACH transmission. According to the solution of the present disclosure, determination of a random access type is realized, and switching between a single PRACH transmission and multiple PRACH transmissions can be achieved, thereby improving the transmission efficiency and the communication capability.

Description

A random access type determination method and device Technical Field

The present disclosure relates to the field of communication technology, and in particular to a random access type determination method and a device thereof.

Background Art

A possible solution to the problem of limited uplink coverage of communication networks is to perform multiple Physical Random Access Channel (PRACH) transmissions. Compared with single PRACH transmission, multiple PRACH transmissions enable terminal devices to send multiple signalings in one random access attempt. Currently, there is no consensus on the determination or switching of random access types.

Summary of the invention

The embodiments of the present disclosure provide a random access type determination method and apparatus thereof, which implements the determination of the random access type and can switch between single PRACH transmission and multiple PRACH transmission, thereby improving transmission efficiency and communication capability.

A first aspect embodiment of the present disclosure provides a random access type determination method, which is performed by a user equipment UE. The method includes: for a random access channel RACH attempt in a random access process, when a predetermined event occurs, determining whether to use multiple physical random access channel PRACH transmission or single PRACH transmission.

In some embodiments, the predetermined event includes at least one of the following: the random access type is switched from non-contention random access CFRA to contention random access CBRA; the random access type is switched from CBRA to CFRA; the random access type is switched from two-step random access 2-step RA to four-step random access 4-step RA.

In some embodiments, when a predetermined event occurs, determining to use multiple physical random access channels PRACH transmission or single PRACH transmission includes: if single PRACH transmission is used when random access starts, determining to use single PRACH transmission.

In some embodiments, when a predetermined event occurs, determining to use multiple physical random access channel PRACH transmission or single PRACH transmission includes: if single PRACH transmission is used at the beginning of random access, determining to use multiple PRACH transmission when a preset condition is met.

In some embodiments, when a predetermined event occurs, determining to use multiple physical random access channel PRACH transmission or single PRACH transmission includes: if multiple PRACH transmission is used when random access starts, determining to use multiple PRACH transmission.

In some embodiments, when a predetermined event occurs, determining to use multiple physical random access channel PRACH transmission or single PRACH transmission includes: if multiple PRACH transmission is used at the beginning of random access, determining to use multiple PRACH transmission when a preset condition is met.

In some embodiments, the preset conditions include at least one of the following: the random access type is not 2-step RA; the random access type is not CFRA; the reference signal received power RSRP of the downlink path loss reference point meets the threshold requirement; RACH resources for multiple PRACH transmissions are configured on the partial bandwidth BWP selected by the UE; the RACH resources selected by the UE support multiple PRACH transmissions.

In some embodiments, the method further comprises: determining a number of transmissions for the multiple PRACH transmissions.

In some embodiments, determining the number of transmissions of multiple PRACH transmissions includes: if multiple PRACH transmissions are used at the beginning of random access, determining a first number of transmissions selected by the UE at the beginning of random access; and determining the first number of transmissions as the number of transmissions of multiple PRACH transmissions.

In some embodiments, determining the number of transmissions of the multiple PRACH transmissions comprises: if multiple PRACH transmissions are used at the beginning of random access, Determine a first transmission number selected by the UE when random access starts; determine a second transmission number as the transmission number of multiple PRACH transmissions, wherein the second transmission number is different from the first transmission number.

In some embodiments, the method further includes: receiving configuration information sent by a network device, wherein the configuration information carries information indicating whether the UE determines to adopt multi-PRACH transmission or single PRACH transmission when a predetermined event occurs.

In some embodiments, when a predetermined event occurs, determining whether to use multiple physical random access channel PRACH transmission or single PRACH transmission includes: based on the configuration information of the network device or based on the protocol agreement, when a predetermined event occurs, determining whether to use multiple physical random access channel PRACH transmission or single PRACH transmission.

In some embodiments, the method further includes: sending capability information to a network device, wherein the capability information identifies whether the UE supports switching between single PRACH and multiple PRACH transmissions during random access, and/or the capability information identifies whether the UE has the ability to adjust the number of transmissions of multiple PRACH transmissions.

A second aspect embodiment of the present disclosure provides a method for determining a random access type, which is performed by a network device. The method includes: for a random access channel RACH attempt in a random access process, receiving a PRACH transmission message sent by a user equipment UE with a random access type of multiple physical random access channel PRACH transmission or a single PRACH transmission, wherein the random access type is determined by the UE when a predetermined event occurs.

In some embodiments, the predetermined event includes at least one of the following: the random access type is switched from non-contention random access CFRA to contention random access CBRA; the random access type is switched from CBRA to CFRA; the random access type is switched from two-step random access 2-step RA to four-step random access 4-step RA.

In some embodiments, the method further includes: sending configuration information to the UE, wherein the configuration information carries information indicating whether the UE determines to adopt multi-PRACH transmission or single PRACH transmission when a predetermined event occurs.

In some embodiments, the method further includes: receiving capability information sent by the UE, wherein the capability information identifies whether the UE supports switching between single PRACH and multiple PRACH transmissions during random access, and/or the capability information identifies whether the UE has the ability to adjust the number of transmissions of multiple PRACH transmissions.

The third aspect embodiment of the present disclosure provides a random access type determination device, which is configured in a user equipment UE, and includes: a determination module, which is used to determine whether to use multiple physical random access channel PRACH transmission or single PRACH transmission for a random access channel RACH attempt in a random access process when a predetermined event occurs.

The fourth aspect embodiment of the present disclosure provides a random access type determination device, which is configured on a network device, and the device includes: a receiving module, which is used to receive a PRACH transmission message sent by a user equipment UE for a random access channel RACH attempt in a random access process, with a random access type of multiple physical random access channel PRACH transmission or single PRACH transmission, wherein the random access type is determined by the UE when a predetermined event occurs.

The fifth aspect embodiment of the present disclosure provides a communication device, including: a transceiver; a memory; a processor, which is connected to the transceiver and the memory respectively, and is configured to control the wireless signal reception and transmission of the transceiver by executing computer-executable instructions on the memory, and can implement the method described in the first aspect embodiment of the present disclosure.

The sixth aspect embodiment of the present disclosure provides a computer-readable storage medium for storing instructions, which, when executed, enables the method described in the first aspect embodiment of the present disclosure to be implemented.

The embodiment of the present disclosure provides a random access type determination method and a device thereof, wherein a user equipment UE can determine a random access type. The random access channel RACH attempt in the process determines whether to use multiple physical random access channel PRACH transmission or single PRACH transmission when a predetermined event occurs. The scheme disclosed in the present invention determines the random access type by setting a predetermined event, and can switch between single PRACH transmission and multiple PRACH transmission, thereby improving transmission efficiency and communication capability.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the background technology, the drawings required for use in the embodiments of the present disclosure or the background technology will be described below.

FIG1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure;

FIG2 is a schematic diagram of a flow chart of a method for determining a random access type provided by an embodiment of the present disclosure;

FIG3 is a schematic diagram of a flow chart of a method for determining a random access type provided by an embodiment of the present disclosure;

FIG4 is a schematic diagram of a flow chart of a method for determining a random access type provided by an embodiment of the present disclosure;

FIG5 is a schematic diagram of a flow chart of a method for determining a random access type provided by an embodiment of the present disclosure;

FIG6 is a schematic diagram of a flow chart of a method for determining a random access type according to an embodiment of the present disclosure;

FIG7 is a schematic diagram of a flow chart of a method for determining a random access type provided by an embodiment of the present disclosure;

FIG8 is a schematic diagram of the structure of a random access type determination device provided by an embodiment of the present disclosure;

FIG9 is a schematic diagram of the structure of a random access type determination device provided by an embodiment of the present disclosure;

FIG10 is a schematic diagram of the structure of a communication device provided by an embodiment of the present disclosure;

FIG. 11 is a schematic diagram of the structure of a chip provided in an embodiment of the present disclosure.

DETAILED DESCRIPTION

Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

The terms used in the disclosed embodiments are only for the purpose of describing specific embodiments and are not intended to limit the disclosed embodiments. The singular forms of "a" and "the" used in the disclosed embodiments and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. 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.

It should be understood that, although the terms first, second, third, etc. may be used to describe various information in the embodiments of the present disclosure, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" for the purpose of brevity and ease of understanding, the terms used herein when characterizing the size relationship are "greater than" or "less than", "higher than" or "lower than". However, for those skilled in the art, it can be understood that the term "greater than" also covers the meaning of "greater than or equal to", and "less than" also covers the meaning of "less than or equal to"; the term "higher than" covers the meaning of "higher than or equal to", and "lower than" also covers the meaning of "lower than or equal to".

In order to better understand the random access type determination method disclosed in the embodiment of the present disclosure, the following first describes the method applicable to the embodiment of the present disclosure. The communication system is described below.

Please refer to FIG. 1, which is a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure. The communication system may include, but is not limited to, a network device and a terminal device. The number and form of devices shown in FIG. 1 are only used as examples and do not constitute a limitation on the embodiments of the present disclosure. In actual applications, two or more network devices and two or more terminal devices may be included. The communication system shown in FIG. 1 includes, for example, a network device 101 and a terminal device 102.

It should be noted that the technical solution of the embodiment of the present disclosure can be applied to various communication systems. For example: long term evolution (LTE) system, fifth generation (5G) mobile communication system, 5G new radio (NR) system, or other future new mobile communication systems. It should also be noted that the side link in the embodiment of the present disclosure can also be called a side link or a through link.

The network device 101 in the embodiment of the present disclosure is an entity on the network side for transmitting or receiving signals. For example, the network device 101 may be an evolved NodeB (eNB), a transmission point (TRP), a next generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system. The embodiment of the present disclosure does not limit the specific technology and specific device form adopted by the network device. The network device provided in an embodiment of the present disclosure may be composed of a central unit (CU) and a distributed unit (DU), wherein the CU may also be referred to as a control unit. The CU-DU structure may be used to split the protocol layer of the network device, such as a base station, and the functions of some protocol layers are placed in the CU for centralized control, and the functions of the remaining part or all of the protocol layers are distributed in the DU, and the DU is centrally controlled by the CU.

The terminal device 102 in the disclosed embodiment is an entity on the user side for receiving or transmitting signals, such as a mobile phone. The terminal device may also be referred to as a terminal device (terminal), a user equipment (UE), a mobile station (MS), a mobile terminal device (MT), etc. The terminal device may be a car with communication function, a smart car, a mobile phone (mobile phone), a wearable device, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in a smart city (smart city), a wireless terminal device in a smart home (smart home), etc. The embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal device.

It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution provided by an embodiment of the present disclosure. A person of ordinary skill in the art can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided by an embodiment of the present disclosure is also applicable to similar technical problems.

It should be noted that the random access type determination method provided in any embodiment of the present disclosure may be executed alone, or in combination with possible implementation methods in other embodiments, or in combination with any technical solution in related technologies.

In previous standards, such as the 3GPP R17 standard, a terminal device can only send a single signaling in one random access attempt, that is, a single PRACH transmission. However, single PRACH transmission limits the uplink coverage capability of the communication network to a certain extent. Therefore, in order to alleviate the problem of limited uplink coverage, the 3GPP R18 standard is preparing to formulate a solution based on multiple PRACH transmissions, that is, allowing terminal devices to send multiple signalings in one random access attempt. However, there is currently no solution for determining and switching the random access type. The solution disclosed in the present invention realizes the determination of the random access type and can switch between single PRACH transmission and multiple PRACH transmission, thereby improving transmission efficiency. The random access type determination method and device provided by the present disclosure are described in detail below in conjunction with the accompanying drawings.

It should be understood that adopting a single PRACH transmission or adopting a multiple PRACH transmission may refer to adopting a single PRACH or multiple PRACHs for random access, for example, preamble codes may be sent in multiple formats based on a single PRACH or multiple PRACHs. The transmission may refer to information or messages sent on the PRACH.

Please refer to Figure 2, which is a flow chart of a method for determining a random access type provided by an embodiment of the present disclosure. The method is executed by a user equipment (UE), as shown in Figure 2, and includes but is not limited to the following steps:

S201: For a random access channel RACH attempt in a random access process, when a predetermined event occurs, determine whether to use multiple physical random access channel PRACH transmission or single PRACH transmission.

In some optional embodiments, single PRACH transmission means that the UE sends a preamble to the network device at one time, or in other words, the UE sends a message 1 (Msg1) to the network device at one time. Similarly, multiple PRACH transmission means that the UE sends multiple preambles to the network device at one time, or in other words, the UE sends multiple Msg1s to the network device at one time.

In some optional embodiments, the multi-PRACH transmission may be sending multiple Msg1s to one network device (or one cell of one network device) at one time.

In some optional embodiments, when the UE performs multiple PRACH transmissions, it may be that after sending the first Msg1 to the network device, it starts to monitor the message 2 (Msg2) sent by the network device to the UE, or the UE may send multiple Msg1s to the network device at one time and then receive Msg2 from the network device, which is not limited in the present disclosure.

In some optional embodiments, the Msg1 sent by the UE in multiple PRACH transmissions is the same (or the information carried by the Msg1 is the same). In other words, the multiple PRACHs are the same PRACH.

In some optional implementations, the user equipment UE may determine whether to adopt multiple physical random access channel (PRACH) transmission or single PRACH transmission for a random access channel (RACH) attempt in the random access process when a predetermined event occurs. That is, the user equipment UE may determine whether the current transmission adopts multiple PRACH transmission when a predetermined event occurs in one (or in other words, each of multiple) RACH attempts in the random access process.

Optionally, the predetermined event may include, but is not limited to, at least one of the following: the random access type is switched from non-contention random access (Contention Free Random Access, CFRA) to contention random access (Contention Based Random Access, CBRA); the random access type is switched from contention random access CBRA to non-contention random access CFRA; the random access type is switched from two-step random access (2-step Random Access, 2-step RA) to four-step random access (4-step RA Random Access, 4-step RA).

In the embodiment of the present disclosure, when determining whether to adopt multiple PRACH transmission, the user equipment UE may determine whether to adopt multiple PRACH transmission when a predetermined event occurs according to different PRACH transmission conditions at the start of random access. For example, the PRACH transmission condition at the start of random access may include: adopting single PRACH transmission at the start of random access, and adopting multiple PRACH transmission at the start of random access. An example is given below.

a) Single PRACH transmission is used at the beginning of random access.

Optionally, if single PRACH transmission is adopted at the beginning of random access, it is determined to adopt single PRACH transmission, that is, the user equipment adopts single PRACH transmission at the beginning of random access, and when a predetermined event occurs, the user equipment may continue to adopt single PRACH transmission.

Optionally, if a single PRACH transmission is used at the beginning of random access, it is determined to use multiple PRACHs if a preset condition is met. Transmission, that is, the user equipment adopts single PRACH transmission at the beginning of random access, and in the event of a predetermined event, if the preset conditions are met, the user equipment can adopt multiple PRACH transmissions.

The preset conditions may include at least one of the following: the random access type is not 2-step RA; the random access type is not CFRA; the reference signal receiving power (RSRP) of the downlink path loss reference point meets the threshold requirement; the RACH resources for multiple PRACH transmissions are configured on the bandwidth part (Bandwidth Part, BWP) selected by the UE; the RACH resources selected by the UE support multiple PRACH transmissions. That is, if a single PRACH transmission is used at the beginning of random access, in the event of a predetermined event, the user equipment may continue to use a single PRACH transmission, or, when the preset conditions are met, use multiple PRACH transmissions.

b) Multiple PRACH transmissions are used at the beginning of random access.

Optionally, if multiple PRACH transmission is adopted at the beginning of random access, it is determined to adopt multiple PRACH transmission, that is, the user equipment adopts multiple PRACH transmission at the beginning of random access, and when a predetermined event occurs, the user equipment may continue to adopt multiple PRACH transmission.

Optionally, if multiple PRACH transmissions are used at the beginning of random access, if preset conditions are met, it is determined to use multiple PRACH transmissions, that is, multiple PRACH transmissions are used at the beginning of random access of the user equipment, and when a predetermined event occurs, if the preset conditions are met, the user equipment may use multiple PRACH transmissions.

The preset conditions may include at least one of the following: the random access type is not 2-step RA; the random access type is not CFRA; the reference signal received power RSRP of the downlink path loss reference point meets the threshold requirement; the RACH resources for multi-PRACH transmission are configured on the partial bandwidth BWP selected by the UE; the RACH resources selected by the UE support multi-PRACH transmission. In other words, if multi-PRACH transmission is used at the beginning of random access, in the event of a predetermined event, the user equipment may continue to use multi-PRACH transmission, or, when the preset conditions are met, use multi-PRACH transmission.

It should be understood that the PRACH transmission mode adopted by the user equipment at the beginning of random access is not limited by the present disclosure. In some embodiments, the random access success includes the following situations:

1) CFRA/2-step RA, UE determines to use single PRACH transmission: UE sends Msg1 to the network device, and the network device sends Msg2 to the UE after successful reception. After the UE successfully receives Msg2, the access is completed;

2) CFRA/2-step RA, UE determines to use multiple PRACH transmission: UE sends multiple Msg1s to the network device, and the network device sends Msg2 to the UE after successfully receiving one or more Msg1s. When the UE successfully receives Msg2, access is completed;

3) CBRA/4-step RA, UE determines to use single PRACH transmission: UE sends Msg1 to the network device, the network device sends Msg2 to the UE after successful reception, the UE sends message 3 (Mg3) to the network device after successful reception, the network device sends message 4 (Mg4) to the UE after successful reception, and the UE completes access when successful reception is successful;

4) CBRA/4-step RA, UE determines to use multi-PRACH transmission: UE sends multiple Msg1s to the network device. After the network device successfully receives one or more Msg1s, it sends Msg2 to the UE. After the UE successfully receives Msg2, it sends message 3 (Mg3) to the network device. After successfully receiving Msg2, the network device sends message 4 (Mg4) to the UE. Once the UE receives successfully, the access is completed.

In the disclosed embodiments, the random access type is determined, and switching between single PRACH transmission and multiple PRACH transmission can be performed, thereby improving transmission efficiency and communication capability.

Please refer to FIG. 3 , which is a flow chart of a method for determining a random access type provided by an embodiment of the present disclosure. The method for determining a random access type is performed by a user equipment UE. In addition to the method shown in the embodiment of FIG. 2 , the method may also include but is not limited to the following steps:

S301, determining the number of transmissions of multiple PRACH transmissions.

In some optional implementations, the user equipment may determine the number of transmissions of the multiple PRACH transmissions, i.e., if the user equipment randomly accesses the start If multiple PRACH transmission is initially adopted, when a predetermined event occurs, if it is determined to adopt multiple PRACH transmission, the user equipment may select the number of transmissions of the multiple PRACH transmission.

In this embodiment, the user equipment may use different methods to determine the number of transmissions when performing multiple PRACH transmissions. For example, the method for the user equipment to determine the number of transmissions may include: continuing to use the number of multiple PRACH transmissions selected by the UE at the beginning of random access, and re-determining the number of transmissions for multiple PRACH transmissions. An example is given below.

1) Continue to use the multiple PRACH transmission times selected by the UE at the beginning of random access.

Optionally, if multiple PRACH transmissions are used at the start of random access, determine a first transmission number selected by the UE at the start of random access; and determine the first transmission number as the transmission number of the multiple PRACH transmissions.

The first transmission number, that is, the transmission number selected by the UE at the beginning of random access, can be obtained based on signal quality calculation, and the specific method for obtaining the transmission number is not limited by the embodiments of the present disclosure.

That is, when multiple PRACH transmissions are used at the start of random access, the user equipment may determine the number of transmissions for performing multiple PRACH transmissions after a predetermined event occurs according to the first number of transmissions selected by the UE at the start of random access.

2) Re-determine the number of transmissions of the multi-PRACH transmission.

Optionally, if multiple PRACH transmissions are used at the beginning of random access, determine the first number of transmissions selected by the UE at the beginning of random access; and determine the second number of transmissions as the number of transmissions of the multiple PRACH transmissions. The second number of transmissions is different from the first number of transmissions, and the second number of transmissions, that is, the number of transmissions obtained by re-determining the multiple PRACH transmissions of the user equipment, can be obtained based on signal quality calculations. The specific method for obtaining the number of transmissions is not limited by the embodiments of the present disclosure.

That is, when multiple PRACH transmissions are used at the beginning of random access, the user equipment may reset the number of transmissions of the multiple PRACH transmissions to determine the number of transmissions when multiple PRACH transmissions are performed after a predetermined event occurs.

In the disclosed embodiment, the user equipment may determine the number of transmissions of the multiple PRACH transmissions, and thus perform the multiple PRACH transmissions with an appropriate number of transmissions, thereby ensuring transmission reliability and improving communication capabilities.

Please refer to FIG. 4, which is a flow chart of a method for determining a random access type provided in an embodiment of the present disclosure. The method for determining a random access type is performed by a user equipment UE. In addition to the methods shown in the embodiments of FIG. 2 to FIG. 3, the method may also include but is not limited to the following steps:

S401, receiving configuration information sent by a network device.

In some optional implementations, the user equipment may receive configuration information sent by the network device, wherein the configuration information may carry, but is not limited to, information indicating whether the UE determines to adopt multi-PRACH transmission or single PRACH transmission when a predetermined event occurs.

That is to say, the user equipment can receive the configuration information sent by the network equipment to determine whether it is necessary to determine whether to use multiple PRACH transmission or single PRACH transmission when sending a predetermined event. For example, the indication information sent by the network equipment indicates to the user equipment that it is necessary to determine whether to use multiple PRACH transmission or single PRACH transmission when a predetermined event occurs. Then, when the predetermined event occurs, the user equipment needs to make a further judgment on whether to use multiple PRACH transmission or single PRACH transmission. Conversely, if the indication information sent by the network equipment indicates to the user equipment that it is not necessary to determine whether to use multiple PRACH transmission or single PRACH transmission when a predetermined event occurs, then, when the predetermined event occurs, the user equipment does not need to make a further judgment on whether to use multiple PRACH transmission or single PRACH transmission.

In the disclosed embodiment, the user equipment may receive configuration information sent by the network equipment to determine whether to use multiple PRACH transmissions or single PRACH transmissions when a predetermined event occurs, thereby ensuring transmission reliability and improving communication capabilities.

Please refer to FIG. 5, which is a flow chart of a method for determining a random access type provided by an embodiment of the present disclosure. The method for determining a random access type is performed by a user equipment UE. When a predetermined event occurs, it is determined to adopt multiple physical random access channel PRACH transmission or single PRACH transmission. The method may include but is not limited to the following steps:

S501, based on the configuration information of the network device or based on the protocol agreement, when a predetermined event occurs, determine whether to use multiple physical random access channel PRACH transmission or single PRACH transmission.

In some optional implementations, the user equipment may determine to adopt multiple physical random access channel PRACH transmission or single PRACH transmission based on configuration information of the network device or based on a protocol agreement when a predetermined event occurs.

That is to say, the user equipment can determine whether to use multiple physical random access channel PRACH transmission or single PRACH transmission based on the configuration information of the network device when a predetermined event occurs, or the user equipment can determine whether to use multiple physical random access channel PRACH transmission or single PRACH transmission based on the protocol agreement when a predetermined event occurs.

In the disclosed embodiment, the user equipment may determine whether to adopt multiple physical random access channel PRACH transmission or single PRACH transmission based on the configuration information of the network equipment or based on the protocol agreement when a predetermined event occurs, thereby ensuring transmission reliability and improving communication capabilities.

Please refer to FIG. 6, which is a flow chart of a method for determining a random access type provided in an embodiment of the present disclosure. The method for determining a random access type is performed by a user equipment UE. In addition to the methods shown in the embodiments of FIG. 2 to FIG. 5, the method may also include but is not limited to the following steps:

S601: Send capability information to a network device.

In some optional implementations, the user equipment UE may send capability information to the network device, wherein the capability information identifies whether the UE supports switching between single PRACH and multiple PRACH transmissions during random access, and/or the capability information identifies whether the UE has the ability to adjust the number of transmissions of multiple PRACH transmissions.

That is, the user equipment may report its capability information to the network equipment, such as whether it has the capability to support single PRACH/multiple PRACH transmission switching during random access, or whether it has the capability to adjust the number of transmissions of multiple PRACH transmissions.

In the disclosed embodiment, the user equipment may report capability information to the network equipment so that the network equipment can understand whether the user equipment can perform single PRACH/multi-PRACH transmission switching, or can adjust the number of transmissions of multi-PRACH transmissions, thereby ensuring transmission reliability and improving communication capabilities.

The embodiments of the present disclosure are not exhaustive, but are only illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

In each embodiment of the present disclosure, unless otherwise specified or there is a logical conflict, the terms and/or descriptions between the embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment based on their internal logical relationships.

Another aspect of the present disclosure may provide a network device, wherein the network device may be used to perform the steps relative to the above steps S401, S501, and S601. Specifically, in some optional embodiments, the network device may send configuration information to the UE, wherein the configuration information may carry but is not limited to carrying an indication of whether the UE determines to use multiple PRACH transmission or single PRACH when a predetermined event occurs. In some optional embodiments, the network device may not send configuration information to the UE, and the UE may determine whether to use single PRACH transmission or multiple PRACH transmission according to the protocol agreement. In some optional embodiments, the network device may be used to receive capability information sent by the UE, wherein the capability information identifies whether the UE supports switching between single PRACH and multiple PRACH transmissions during random access, and/or the capability information identifies whether the UE has the ability to adjust the number of transmissions of multiple PRACH transmissions.

Please refer to FIG. 7, which is a flow chart of a method for determining a random access type provided by an embodiment of the present disclosure. The method for determining a random access type is performed by a network device. The method may include but is not limited to the following steps:

S701: For a random access channel RACH attempt in a random access process, a PRACH transmission message sent by a user equipment UE is received with a random access type of multiple physical random access channels PRACH transmission or single PRACH transmission.

In some optional embodiments, single PRACH transmission refers to the UE sending a PRACH transmission message to the network device at one time, or in other words, sending a preamble, or in other words, the UE sending a message 1 (Msg1) to the network device at one time. In some embodiments, the PRACH transmission message is Msg1. Similarly, multiple PRACH transmission refers to the UE sending multiple preambles to the network device at one time, or in other words, the UE sending multiple Msg1s to the network device at one time.

In some optional embodiments, the multi-PRACH transmission may be sending multiple Msg1s to one network device (or one cell of one network device) at one time.

In some optional embodiments, when the UE performs multiple PRACH transmissions, it may be that after sending the first Msg1 to the network device, it starts to monitor the message 2 (Msg2) sent by the network device to the UE, or the UE may send multiple Msg1s to the network device at one time and then receive Msg2 from the network device, which is not limited in the present disclosure.

In some optional embodiments, the Msg1 sent by the UE in multiple PRACH transmissions is the same (or the information carried by the Msg1 is the same). In other words, the multiple PRACHs are the same PRACH.

In some optional implementations, the user equipment UE may determine whether to adopt multiple physical random access channel (PRACH) transmission or single PRACH transmission for a random access channel (RACH) attempt in the random access process when a predetermined event occurs. That is, the user equipment UE may determine whether the current transmission adopts multiple PRACH transmission when a predetermined event occurs in one (or in other words, each of multiple) RACH attempts in the random access process.

Optionally, the predetermined event may include, but is not limited to, at least one of the following: the random access type is switched from non-contention random access (Contention Free Random Access, CFRA) to contention random access (Contention Based Random Access, CBRA); the random access type is switched from contention random access CBRA to non-contention random access CFRA; the random access type is switched from two-step random access (2-step Random Access, 2-step RA) to four-step random access (4-step RA Random Access, 4-step RA).

In the embodiment of the present disclosure, when determining whether to adopt multiple PRACH transmission, the user equipment UE may determine whether to adopt multiple PRACH transmission when a predetermined event occurs according to different PRACH transmission conditions at the start of random access. For example, the PRACH transmission condition at the start of random access may include: adopting single PRACH transmission at the start of random access, and adopting multiple PRACH transmission at the start of random access. An example is given below.

a) Single PRACH transmission is used at the beginning of random access.

Optionally, if single PRACH transmission is adopted at the beginning of random access, it is determined to adopt single PRACH transmission, that is, the user equipment adopts single PRACH transmission at the beginning of random access, and when a predetermined event occurs, the user equipment may continue to adopt single PRACH transmission.

Optionally, if single PRACH transmission is used at the beginning of random access, if preset conditions are met, it is determined to use multiple PRACH transmission, that is, the user equipment uses single PRACH transmission at the beginning of random access, and when a predetermined event occurs, if the preset conditions are met, the user equipment can use multiple PRACH transmission.

The preset conditions may include at least one of the following: the random access type is not 2-step RA; the random access type is not CFRA; the reference signal receiving power (RSRP) of the downlink path loss reference point meets the threshold requirement; the RACH resources for multiple PRACH transmissions are configured on the bandwidth part (Bandwidth Part, BWP) selected by the UE; the RACH resources selected by the UE support multiple PRACH transmissions. That is, if a single PRACH transmission is used at the beginning of random access, in the event of a predetermined event, the user equipment may continue to use a single PRACH transmission, or, when the preset conditions are met, use multiple PRACH transmissions.

b) Multiple PRACH transmissions are used at the beginning of random access.

Optionally, if multiple PRACH transmission is adopted at the beginning of random access, it is determined to adopt multiple PRACH transmission, that is, the user equipment adopts multiple PRACH transmission at the beginning of random access, and when a predetermined event occurs, the user equipment may continue to adopt multiple PRACH transmission.

Optionally, if multiple PRACH transmissions are used at the beginning of random access, if preset conditions are met, it is determined to use multiple PRACH transmissions, that is, multiple PRACH transmissions are used at the beginning of random access of the user equipment, and when a predetermined event occurs, if the preset conditions are met, the user equipment may use multiple PRACH transmissions.

The preset conditions may include at least one of the following: the random access type is not 2-step RA; the random access type is not CFRA; the reference signal received power RSRP of the downlink path loss reference point meets the threshold requirement; the RACH resources for multi-PRACH transmission are configured on the partial bandwidth BWP selected by the UE; the RACH resources selected by the UE support multi-PRACH transmission. In other words, if multi-PRACH transmission is used at the beginning of random access, the user equipment may continue to use multi-PRACH transmission in the event of a predetermined event, or, when the preset conditions are met, use multi-PRACH transmission.

It should be understood that the PRACH transmission mode adopted by the user equipment at the beginning of random access is not limited by the present disclosure. In some embodiments, the random access success includes the following situations:

1) CFRA/2-step RA, UE determines to use single PRACH transmission: UE sends Msg1 to the network device, and the network device sends Msg2 to the UE after successful reception. After the UE successfully receives Msg2, the access is completed;

2) CFRA/2-step RA, UE determines to use multiple PRACH transmission: UE sends multiple Msg1s to the network device, and the network device sends Msg2 to the UE after successfully receiving one or more Msg1s. When the UE successfully receives Msg2, access is completed;

3) CBRA/4-step RA, UE determines to use single PRACH transmission: UE sends Msg1 to the network device, the network device sends Msg2 to the UE after successful reception, the UE sends message 3 (Mg3) to the network device after successful reception, the network device sends message 4 (Mg4) to the UE after successful reception, and the UE completes access when successful reception is successful;

4) CBRA/4-step RA, UE determines to use multi-PRACH transmission: UE sends multiple Msg1s to the network device. After the network device successfully receives one or more Msg1s, it sends Msg2 to the UE. After the UE successfully receives Msg2, it sends message 3 (Mg3) to the network device. After successfully receiving Msg2, the network device sends message 4 (Mg4) to the UE. Once the UE receives successfully, the access is completed.

In the disclosed embodiments, the random access type is determined, and switching between single PRACH transmission and multiple PRACH transmission can be performed, thereby improving transmission efficiency and communication capability.

The random access type is determined by the UE when a predetermined event occurs.

In some embodiments, the predetermined event includes at least one of the following:

The random access type is switched from non-contention random access CFRA to contention random access CBRA;

The random access type is switched from CBRA to CFRA;

The random access type is switched from two-step random access 2-step RA to four-step random access 4-step RA.

In some embodiments, the method further comprises: sending configuration information to the UE,

The configuration information carries information indicating whether the UE determines to adopt multi-PRACH transmission or single PRACH transmission when a predetermined event occurs.

In some embodiments, the method further comprises: receiving capability information sent by the UE,

The capability information identifies whether the UE supports switching between single PRACH and multiple PRACH transmissions during random access, and/or the capability information identifies whether the UE has the ability to adjust the number of transmissions of multiple PRACH transmissions.

In the disclosed embodiments, the random access type is determined, and switching between single PRACH transmission and multiple PRACH transmission can be performed, thereby improving transmission efficiency and communication capability.

It should be understood that another aspect of the present disclosure may provide a communication system, wherein the communication system includes a UE and a network device. The UE may perform one or more steps in the embodiments shown in Figures 2 to 6 above. The network device may perform steps corresponding to the UE.

In some optional embodiments, the UE and the network device perform the following steps to implement the random access procedure:

Step 1: The UE sends capability information to the network device.

The capability information identifies whether the UE supports switching between single PRACH and multiple PRACH transmissions during random access, and/or the capability information identifies whether the UE has the ability to adjust the number of transmissions of multiple PRACH transmissions.

The above step 1 may be an optional step.

Step 2: The network device sends configuration information to the UE.

The configuration information carries information indicating whether the UE determines to adopt multi-PRACH transmission or single PRACH transmission when a predetermined event occurs.

The above step 2 may be an optional step.

Step 3: For each random access channel RACH attempt in the random access process, when a predetermined event occurs, the UE determines to adopt multiple physical random access channel PRACH transmission or single PRACH transmission.

In some embodiments, if in step 2 the network device instructs the UE to determine whether to use multiple PRACH transmissions or single PRACH transmissions when a predetermined event occurs, step 3 is performed.

Step 4: The UE sends a PRACH transmission message Msg1 to the network device.

In some embodiments, if it is determined in step 3 to perform single PRACH transmission, the UE sends one Msg1 to the network device at one time; if it is determined in step 3 to perform multiple PRACH transmission, the UE sends multiple Msg1 to the network device at one time.

Correspondingly, the network device receives the PRACH transmission message Msg1 sent by the UE.

Step 5: The network device sends Msg2 to the UE.

In some embodiments, if the network device successfully receives Msg1 (including successfully receiving one Msg1 transmitted by a single PRACH, and also including successfully receiving one or more Msg1 transmitted by multiple PRACH), the network device sends Msg2 to the UE.

For CFRA and 2-step RA, the network device sends a successful Msg2 to the UE, indicating that the access is successful, thus completing the random access process.

Step 6: The UE sends Msg3 to the network device.

Step 7: The network device sends Msg4 to the UE.

The above steps 6 and 7 are optional steps, that is, for CFRA and 2-step RA, the above steps 6 and 7 do not need to be performed. For CBRA and 4-step RA, the network device sends a successful Msg4 to the UE, indicating that the access is successful and the random access process is completed.

Please refer to FIG8, which is a schematic diagram of the structure of a random access type determination device 80 provided in an embodiment of the present disclosure. The random access type determination device 80 shown in FIG8 is executed by a user equipment UE and may include:

The determination module 810 is used to determine whether to adopt multiple physical random access channel PRACH transmission or single PRACH transmission for a random access channel RACH attempt in a random access process when a predetermined event occurs.

Optionally, the predetermined event includes at least one of the following: the random access type is switched from non-contention random access CFRA to contention random access CBRA; the random access type is switched from CBRA to CFRA; the random access type is switched from two-step random access 2-step RA to four-step random access 4-step RA.

Optionally, when a predetermined event occurs and it is determined whether to adopt multiple physical random access channel PRACH transmission or single PRACH transmission, the determination module 810 is further configured to: if single PRACH transmission is adopted when random access starts, determine to adopt single PRACH transmission.

Optionally, when a predetermined event occurs and it is determined whether to adopt multiple physical random access channel PRACH transmission or single PRACH transmission, the determination module 810 is further configured to: if single PRACH transmission is adopted at the beginning of random access, determine to adopt multiple PRACH transmission if preset conditions are met.

Optionally, when a predetermined event occurs and it is determined whether to adopt multiple physical random access channel PRACH transmission or single PRACH transmission, the determination module 810 is further configured to: if multiple PRACH transmission is adopted at the beginning of random access, determine to adopt multiple PRACH transmission.

Optionally, when a predetermined event occurs and it is determined whether to adopt multiple physical random access channel PRACH transmission or single PRACH transmission, the determination module 810 is further configured to: if multiple PRACH transmission is adopted at the beginning of random access, determine to adopt multiple PRACH transmission when preset conditions are met.

Optionally, the preset conditions include at least one of the following: the random access type is not 2-step RA; the random access type is not CFRA; the reference signal received power RSRP of the downlink path loss reference point meets the threshold requirement; RACH resources for multiple PRACH transmissions are configured on the partial bandwidth BWP selected by the UE; the RACH resources selected by the UE support multiple PRACH transmissions.

Optionally, the determination module 810 is further configured to: determine the number of transmissions of the multi-PRACH transmission.

Optionally, when determining the number of transmissions of multiple PRACH transmissions, the determination module 810 is further configured to: if multiple PRACH transmissions are used at the start of random access, determine the first number of transmissions selected by the UE at the start of random access; and determine the first number of transmissions as the number of transmissions of multiple PRACH transmissions.

Optionally, when determining the number of transmissions of multiple PRACH transmissions, the determination module 810 is further configured to: if multiple PRACH transmissions are used at the start of random access, determine the first number of transmissions selected by the UE at the start of random access; determine the second number of transmissions as the number of transmissions of multiple PRACH transmissions, wherein the second number of transmissions is different from the first number of transmissions.

Optionally, the apparatus 80 further includes a receiving module, configured to receive configuration information sent by a network device, wherein the configuration information carries information indicating whether the UE determines to adopt multi-PRACH transmission or single PRACH transmission when a predetermined event occurs.

Optionally, when a predetermined event occurs and it is determined whether to adopt multiple physical random access channel PRACH transmission or single PRACH transmission, the determination module 810 is also configured to: based on the configuration information of the network device or based on the protocol agreement, when a predetermined event occurs, determine whether to adopt multiple physical random access channel PRACH transmission or single PRACH transmission.

Optionally, the receiving module is further used to send capability information to the network device, wherein the capability information identifies whether the UE supports switching between single PRACH and multiple PRACH transmissions during random access, and/or the capability information identifies whether the UE has the capability to adjust multiple PRACHs. The ability to transfer the number of transfers.

Please refer to FIG9, which is a schematic diagram of the structure of a random access type determination device 90 provided in an embodiment of the present disclosure. The random access type determination device 90 shown in FIG8 is executed by a user equipment UE and may include:

The receiving module 910 is used to receive a PRACH transmission message sent by a user equipment UE with a random access channel RACH attempt in a random access process, with a random access type of multiple physical random access channel PRACH transmission or a single PRACH transmission, wherein the random access type is determined by the UE when a predetermined event occurs.

In some embodiments, the predetermined event includes at least one of the following:

The random access type is switched from non-contention random access CFRA to contention random access CBRA;

The random access type is switched from CBRA to CFRA;

The random access type is switched from two-step random access 2-step RA to four-step random access 4-step RA.

In some embodiments, the apparatus 90 further comprises a sending module, configured to send configuration information to the UE, wherein the configuration information carries information indicating whether the UE determines to adopt multi-PRACH transmission or single PRACH transmission when a predetermined event occurs.

In some embodiments, the receiving module 910 is further configured to receive capability information sent by the UE.

The capability information identifies whether the UE supports switching between single PRACH and multiple PRACH transmissions during random access, and/or the capability information identifies whether the UE has the ability to adjust the number of transmissions of multiple PRACH transmissions.

Thereby, transmission reliability is ensured, thereby improving communication capabilities.

Please refer to Figure 10, which is a schematic diagram of the structure of another communication device 80 provided in an embodiment of the present disclosure. The communication device 80 can be a network device, or a terminal device, or a chip, a chip system, or a processor that supports the network device to implement the above method, or a chip, a chip system, or a processor that supports the terminal device to implement the above method. The device can be used to implement the method described in the above method embodiment, and the details can be referred to the description in the above method embodiment.

The communication device 80 may include one or more processors 801. The processor 801 may be a general-purpose processor or a dedicated processor, etc. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a computer program, and process the data of the computer program.

Optionally, the communication device 80 may further include one or more memories 802, on which a computer program 803 may be stored, and the processor 801 executes the computer program 803, so that the communication device 80 performs the method described in the above method embodiment. Optionally, data may also be stored in the memory 802. The communication device 80 and the memory 802 may be provided separately or integrated together.

Optionally, the communication device 80 may further include a transceiver 804 and an antenna 805. The transceiver 804 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., and is used to implement a transceiver function. The transceiver 804 may include a receiver and a transmitter, the receiver may be referred to as a receiver or a receiving circuit, etc., and is used to implement a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., and is used to implement a transmitting function.

Optionally, the communication device 80 may further include one or more interface circuits 806. The interface circuit 806 is used to receive code instructions and transmit them to the processor 801. The processor 801 runs the code instructions to enable the communication device 80 to perform the method described in the above method embodiment.

The communication device 80 is a terminal device used to implement the functions of the terminal device in the aforementioned embodiment.

The communication device 80 is a network device used to implement the functions of the network device in the aforementioned embodiment.

In one implementation, the processor 801 may include a transceiver for implementing the receiving and sending functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing the receiving and sending functions may be separate or integrated. The above-mentioned transceiver circuit, interface, or interface circuit may be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface, or interface circuit may be used for transmitting or delivering signals.

In one implementation, the processor 801 may store a computer program 803, which runs on the processor 801 and enables the communication device 80 to perform the method described in the above method embodiment. The computer program 803 may be fixed in the processor 801, in which case the processor 801 may be implemented by hardware.

In one implementation, the communication device 80 may include a circuit that can implement the functions of sending or receiving or communicating in the aforementioned method embodiments. The processor and transceiver described in the present disclosure may be implemented in an integrated circuit (IC), an analog IC, a radio frequency integrated circuit RFIC, a mixed signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and transceiver may also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The communication device described in the above embodiments may be a network device or, but the scope of the communication device described in the present disclosure is not limited thereto, and the structure of the communication device may not be limited by FIG. 9. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be:

(1) Independent integrated circuit IC, or chip, or chip system or subsystem;

(2) having a set of one or more ICs, and optionally, the IC set may also include a storage component for storing data and computer programs;

(3) ASIC, such as modem;

(4) Modules that can be embedded in other devices;

(5) Receivers, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.;

(6)Others

For the case where the communication device can be a chip or a chip system, please refer to the schematic diagram of the chip structure shown in Figure 10. The chip shown in Figure 10 includes a processor 901 and an interface 902. The number of processors 901 can be one or more, and the number of interfaces 902 can be multiple.

The embodiment of the present disclosure also proposes a chip, which can be seen in the schematic diagram of the structure of the chip shown in Figure 10. The chip shown in Figure 10 includes a processor 901 and an interface 902. Among them, the number of processors 901 can be one or more, and the number of interfaces 902 can be multiple. Optionally, the chip also includes a memory 903, and the memory 903 is used to store computer instructions. When the processor executes the computer instructions, the electronic device executes the random access type determination method described in the above embodiment of the present disclosure.

Those skilled in the art can also understand that the various illustrative logical blocks and steps listed in the embodiments of the present disclosure can be implemented by electronic hardware, computer software, or a combination of both. The software implementation depends on the specific application and the design requirements of the entire system. Those skilled in the art can use various methods to implement the functions described for each specific application, but such implementation should not be understood as exceeding the scope of protection of the embodiments of the present disclosure.

The present disclosure also provides a readable storage medium having instructions stored thereon, which implement the functions of any of the above method embodiments when executed by a computer.

The present disclosure also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, the process or function described in the embodiment of the present disclosure is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

Those skilled in the art can understand that the various numerical numbers such as first and second involved in the present disclosure are only used for the convenience of description and are not used to limit the scope of the embodiments of the present disclosure, but also indicate the order of precedence.

At least one in the present disclosure may also be described as one or more, and a plurality may be two, three, four or more, which is not limited in the present disclosure. In the embodiments of the present disclosure, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", etc., and there is no order of precedence or size between the technical features described by the "first", "second", "third", "A", "B", "C" and "D".

The corresponding relationships shown in the tables in the present disclosure can be configured or predefined. The values of the information in each table are only examples and can be configured as other values, which are not limited by the present disclosure. When configuring the corresponding relationship between the information and each parameter, it is not necessarily required to configure all the corresponding relationships illustrated in each table. For example, in the table in the present disclosure, the corresponding relationships shown in some rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above table, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables can also use other names that can be understood by the communication device, and the values or representations of the parameters can also be other values or representations that can be understood by the communication device. When implementing the above tables, other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables.

The predefined in the present disclosure may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this disclosure.

In some embodiments, the terms "access network device (AN device), "radio access network device (RAN device)", "base station (BS)", "radio base station (radio base station)", "fixed station (fixed station)", "node", "access point (access point)", "transmission point (TP)", "reception point (RP)", "transmission/reception point (TRP)", "panel", "antenna panel (antenna panel)", "antenna array (antenna array)", "cell", "macro cell", "small cell (small cell)", "femto cell (femto cell)", "pico cell (pico cell)", "sector (sector)", "cell group (cell)", "serving cell", "carrier (carrier)", "component carrier (component carrier)", "bandwidth part (bandwidth part (BWP))" and so on can be used interchangeably.

In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal" "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client and the like can be used interchangeably.

In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by the communication between multiple terminals (for example, it can also be called device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a structure in which the terminal has all or part of the functions of the access network device. In addition, the language such as "uplink" and "downlink" can also be replaced by the language corresponding to the communication between the terminals (for example, "side"). For example, the uplink channel, the downlink channel, etc. can be replaced by the side channel, and the uplink, the downlink, etc. can be replaced by the side link.

In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may also be configured to have a structure that has all or part of the functions of the terminal.

In some embodiments, the names of information, etc. are not limited to the names recorded in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "code element", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

In some embodiments, "obtain", "obtain", "get", "receive", "transmit", "bidirectional transmission", "send and/or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from a protocol, obtaining by self-processing, autonomous implementation, etc.

In some embodiments, terms such as "send", "transmit", "report", "send", "transmit", "bidirectional transmission", "send and/or receive" can be used interchangeably.

In some embodiments, "predetermined" or "preset" may be interpreted as a pre-determined setting in a protocol or the like, or may be interpreted as a setting in a device or the like. Perform a preset action.

In some embodiments, determining can be interpreted as judging, calculating, computing, processing, deriving, investigating, searching, looking up, searching, inquiring, ascertaining, receiving, transmitting, inputting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, “assuming,” “expecting,” “considering,” broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but is not limited to the foregoing.

In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values (for example, comparison with a predetermined value), but is not limited to this.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims (21)

A method for determining a random access type, characterized in that the method is performed by a user equipment UE, and the method includes: For a random access channel RACH attempt in a random access process, when a predetermined event occurs, it is determined to adopt multiple physical random access channel PRACH transmission or single PRACH transmission. The method according to claim 1, wherein the predetermined event includes at least one of the following: The random access type is switched from non-contention random access CFRA to contention random access CBRA; The random access type is switched from CBRA to CFRA; The random access type is switched from two-step random access 2-step RA to four-step random access 4-step RA. The method according to claim 1 or 2, characterized in that, in the event of a predetermined event, determining to adopt multiple physical random access channel PRACH transmission or single PRACH transmission comprises: If single PRACH transmission is adopted at the beginning of random access, it is determined to adopt single PRACH transmission. The method according to claim 1 or 2, characterized in that, in the event of a predetermined event, determining to adopt multiple physical random access channel PRACH transmission or single PRACH transmission comprises: If single PRACH transmission is adopted at the beginning of random access, it is determined to adopt multiple PRACH transmission when a preset condition is met. The method according to claim 1 or 2, characterized in that, in the event of a predetermined event, determining to adopt multiple physical random access channel PRACH transmission or single PRACH transmission comprises: If multiple PRACH transmission is adopted at the beginning of random access, it is determined to adopt multiple PRACH transmission. The method according to claim 1 or 2, characterized in that, in the event of a predetermined event, determining to adopt multiple physical random access channel PRACH transmission or single PRACH transmission comprises: If multiple PRACH transmission is adopted at the beginning of random access, it is determined to adopt multiple PRACH transmission when a preset condition is met. The method according to claim 4 or 6, characterized in that the preset condition includes at least one of the following: The random access type is not 2-step RA; The random access type is not CFRA; The reference signal received power RSRP of the downlink path loss reference point meets the threshold requirement; RACH resources for multiple PRACH transmissions are configured on the partial bandwidth BWP selected by the UE; The RACH resource selected by the UE supports multiple PRACH transmissions. The method according to any one of claims 1 to 7, characterized in that the method further comprises: Determine a number of transmissions of the multiple PRACH transmissions. The method according to claim 8, characterized in that the determining the number of transmissions of the multiple PRACH transmissions comprises: If multiple PRACH transmissions are used at the start of random access, determining the first transmission number selected by the UE at the start of random access; The first transmission number is determined as the transmission number of the multiple PRACH transmissions. The method according to claim 8, characterized in that the determining the number of transmissions of the multiple PRACH transmissions comprises: If multiple PRACH transmissions are used at the start of random access, determining the first transmission number selected by the UE at the start of random access; Determine the second transmission number as the transmission number of the multiple PRACH transmissions, The second transmission number is different from the first transmission number. The method according to any one of claims 1 to 10, characterized in that the method further comprises: Receive configuration information sent by network devices, The configuration information carries information indicating whether the UE determines to adopt multi-PRACH transmission or single PRACH transmission when a predetermined event occurs. The method according to any one of claims 1 to 11, characterized in that, in the event of a predetermined event, determining to adopt multiple physical random access channel PRACH transmission or single PRACH transmission comprises: Based on the configuration information of the network device or based on the protocol agreement, when a predetermined event occurs, it is determined whether to use multiple physical random access channel PRACH transmission or single PRACH transmission. The method according to any one of claims 1 to 12, characterized in that the method further comprises: Send capability information to network devices, The capability information identifies whether the UE supports switching between single PRACH and multiple PRACH transmissions during random access, and/or the capability information identifies whether the UE has the ability to adjust the number of transmissions of multiple PRACH transmissions. A method for determining a random access type, characterized in that the method is performed by a network device, and the method includes: For a random access channel RACH attempt in a random access process, a PRACH message sent by a user equipment UE is received with a random access type of multiple physical random access channel PRACH transmission or single PRACH transmission, The random access type is determined by the UE when a predetermined event occurs. The method according to claim 14, wherein the predetermined event includes at least one of the following: The random access type is switched from non-contention random access CFRA to contention random access CBRA; The random access type is switched from CBRA to CFRA; The random access type is switched from two-step random access 2-step RA to four-step random access 4-step RA. The method according to claim 14 or 15, characterized in that the method further comprises: sending configuration information to the UE, The configuration information carries information indicating whether the UE determines to adopt multi-PRACH transmission or single PRACH transmission when a predetermined event occurs. The method according to any one of claims 14 to 16, characterized in that the method further comprises: receiving capability information sent by the UE, The capability information identifies whether the UE supports switching between single PRACH and multiple PRACH transmissions during random access, and/or the capability information identifies whether the UE has the ability to adjust the number of transmissions of multiple PRACH transmissions. A random access type determination device, characterized in that the device is configured in a user equipment UE, and the device includes: The determination module is used to determine whether to adopt multiple physical random access channel PRACH transmission or single PRACH transmission for a random access channel RACH attempt in a random access process when a predetermined event occurs. A random access type determination device, characterized in that the device is configured in a network device, and the device comprises: The receiving module is used for the random access channel RACH attempt in the random access process to receive the random access channel PRACH transmission or a random access type of a single PRACH transmission, receiving a PRACH transmission message sent by a user equipment UE, The random access type is determined by the UE when a predetermined event occurs. A communication device, comprising: a transceiver; a memory; a processor, connected to the transceiver and the memory respectively, configured to control the wireless signal reception and transmission of the transceiver by executing computer executable instructions on the memory, and capable of implementing the method described in any one of claims 1-117. A computer storage medium, wherein the computer storage medium stores computer executable instructions; after the computer executable instructions are executed by a processor, the method according to any one of claims 1 to 17 can be implemented.