Random access method, terminal and storage medium

Abstract

The invention relates to a random access method, a terminal and a storage medium. The method comprises the following steps: determining the number of attempts of random access (RA) by adopting an uplink capacity improvement technology; and when the number of attempts is greater than a number threshold, performing RA without using an uplink capacity improvement technology. Therefore, the problem that when the flow of marrow machine access is carried out by adopting uplink capacity improvement, the flow is returned to the traditional random access flow is solved to a certain extent.

Description

Random access method, terminal and storage medium TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of communication, and particularly relates to a random access method, a terminal and a storage medium. BACKGROUND

[0002] In a communication system, one research direction for system performance enhancement is to provide optimized capacity on the uplink through multiplexing technology to improve uplink capacity. The random access process also involves uplink transmission, so the uplink capacity improvement in the random access process also needs to be considered.

[0003] SUMMARY

[0004] Embodiments of the present disclosure provide a random access method, a terminal and a storage medium, which solve the problem of when the process of random access by using uplink capacity improvement falls back to the traditional random access process to a certain extent.

[0005] According to a first aspect of embodiments of the present disclosure, a random access method is provided, the method is performed by a terminal, and the method comprises:

[0006] determining a number of attempts of random access (RA) by using uplink capacity improvement technology;

[0007] not performing RA by using uplink capacity improvement technology in a case that the number of attempts is greater than a threshold number of attempts.

[0008] According to a second aspect of embodiments of the present disclosure, a terminal is provided, comprising:

[0009] a processing module configured to determine a number of attempts of random access (RA) by using uplink capacity improvement technology;

[0010] a transceiver configured to not perform RA by using uplink capacity improvement technology in a case that the number of attempts is greater than a threshold number of attempts.

[0011] According to a third aspect of embodiments of the present disclosure, a terminal is provided, comprising:

[0012] one or more processors;

[0013] The access network device is configured to perform the random access method of the first aspect.

[0014] According to a fourth aspect of embodiments of the present disclosure, a communication system is provided, comprising a network device and a terminal, wherein the terminal is configured to implement the random access method of the first aspect.

[0015] According to a fifth aspect of the embodiments of the present disclosure, a storage medium is provided, and the storage medium stores instructions. When the instructions run on a communication device, the communication device performs the random access method according to the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following describes the drawings required for the embodiments, and the following drawings are only some embodiments of the present disclosure, and do not specifically limit the protection scope of the present disclosure.

[0017] FIG. 1 is an architecture schematic diagram of a communication system according to an embodiment of the present disclosure;

[0018] FIGS. 2A-2C are interaction schematic diagrams of a random access method according to an embodiment of the present disclosure;

[0019] FIGS. 3A-3D are flow schematic diagrams of a random access method according to an embodiment of the present disclosure;

[0020] FIG. 4 is a structure schematic diagram of a terminal according to an embodiment of the present disclosure;

[0021] FIG. 5A is a structure schematic diagram of a communication device according to an embodiment of the present disclosure;

[0022] FIG. 5B is a structure schematic diagram of a chip according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0023] The embodiments of the present disclosure provide a random access method, a terminal and a storage medium.

[0024] In a first aspect, the embodiments of the present disclosure provide a random access method, and the method is performed by a terminal, and the method comprises:

[0025] determining a number of attempts of performing random access (RA) by using an uplink capacity enhancement technology;

[0026] in a case where the number of attempts is greater than a threshold number, not performing RA by using the uplink capacity enhancement technology.

[0027] In the above embodiments, in a case where the number of attempts of performing RA by using the uplink capacity enhancement technology is greater than the threshold number, the terminal can not perform RA by using the uplink capacity enhancement technology in the RA process. Thus, on the basis of improving the uplink capacity of the random access process, the reliability and success rate of RA are ensured, and the reliability of the communication system is improved.

[0028] In combination with some embodiments of the first aspect, in some embodiments, the method further comprises:

[0029] determine the threshold number of times according to the coverage enhancement level selected by the terminal.

[0030] In the above embodiment, by determining the threshold number of times according to the selected coverage enhancement level, the flexibility of fallback to RA without uplink capacity enhancement based on the number of attempts is improved, and the probability of successful random access is further improved.

[0031] In combination with some embodiments of the first aspect, in some embodiments, the RA without using the uplink capacity enhancement technology comprises:

[0032] The coverage enhancement level selected by the terminal is a first coverage enhancement level, and the terminal uses the RA resource without using the OCC and the first coverage enhancement level for RA; or

[0033] The coverage enhancement level selected by the terminal is a first coverage enhancement level, and the terminal is not configured with the RA resource without using the OCC and the first coverage enhancement level, and uses the RA resource without using the OCC and without coverage enhancement for RA.

[0034] In the above embodiment, when the terminal falls back to the RA without uplink capacity enhancement, the terminal can flexibly select the RA resource to be used as needed, further improving the flexibility of RA and providing conditions for further improving the success rate of RA.

[0035] In combination with some embodiments of the first aspect, in some embodiments, the method further comprises:

[0036] determine the threshold number of times according to whether the cell attempted to access by the terminal is a coverage enhancement cell.

[0037] In the above embodiment, the coverage enhancement cell and the non-coverage enhancement cell can correspond to different threshold numbers of times, thereby further improving the flexibility of fallback to traditional RA and providing conditions for further improving the success rate of RA.

[0038] In combination with some embodiments of the first aspect, in some embodiments, for the RA using only any of the following, the number of attempts of the RA includes the number of times of unsuccessfully receiving a random access response RAR: OCC-based physical random access channel PRACH enhancement; OCC-based narrowband NPRACH enhancement; OCC-based physical uplink shared channel PUSCH message MsgA transmission; OCC-based narrowband NPUSCH MsgA transmission.

[0039] In combination with some embodiments of the first aspect, in some embodiments, for the RA using only OCC-based PUSCH transmission of uplink transmission scheduled by a random access response RAR, the number of attempts of the RA only includes the number of times of contention resolution failure.

[0040] With reference to some embodiments of the first aspect, in some embodiments, the number of contention resolution failures comprises any of: a number of times a message 4, Msg4, is not received; a number of times a Msg4 is received but contention resolution fails.

[0041] With reference to some embodiments of the first aspect, in some embodiments, the number of RA attempts comprises a number of times a RAR is unsuccessfully received and a number of contention resolution failures for RA employing one or more of: OCC-based physical random access channel, PRACH, enhancement; OCC-based narrowband, NB, PRACH enhancement; OCC-based physical uplink shared channel, PUSCH, transmission of MsgA; OCC-based NB PUSCH transmission of MsgA; OCC-based PUSCH transmission of uplink transmission scheduled by RAR; OCC-based NB PUSCH transmission of uplink transmission scheduled by RAR.

[0042] In the above embodiments, for different uplink transmissions employing OCC-based in RA procedure, different ways can be employed to determine the number of RA attempts based on uplink capacity boosting techniques, and further determine the timing of fallback to RA without employing OCC, thereby further improving the flexibility of RA and providing conditions for improving the success rate of RA in different situations.

[0043] In a second aspect, the embodiments of the present disclosure provide a terminal, comprising:

[0044] a processing module configured to determine a number of attempts of random access, RA, employing uplink capacity boosting techniques;

[0045] a transceiver configured to perform the RA without employing the uplink capacity boosting techniques if the number of attempts is greater than a threshold number.

[0046] With reference to some embodiments of the second aspect, in some embodiments, the processing module is further configured to:

[0047] determine the threshold number according to a coverage enhancement level selected by the terminal.

[0048] With reference to some embodiments of the second aspect, in some embodiments, the processing module is further configured to:

[0049] the coverage enhancement level selected by the terminal is a first coverage enhancement level, and the RA is performed using RA resources that do not employ OCC and are of the first coverage enhancement level; or

[0050] The terminal selects a coverage enhancement level as a first coverage enhancement level, and the terminal is not configured to use the OCC and the RA resource of the first coverage enhancement level, and the RA is performed using the RA resource which does not use the OCC and is not coverage enhanced.

[0051] In some embodiments of the second aspect, the processing module is further configured to:

[0052] The threshold number of times is determined according to whether the cell that the terminal attempts to access is a coverage enhanced cell.

[0053] In some embodiments of the second aspect, for the RA using only any one of the following, the threshold number of times of the RA includes only the number of times of unsuccessfully receiving a random access response (RAR): OCC-based physical random access channel (PRACH) enhancement; OCC-based narrowband (NB) PRACH enhancement; OCC-based physical uplink shared channel (PUSCH) transmission message (MsgA); OCC-based NB PUSCH transmission MsgA.

[0054] In some embodiments of the second aspect, for the RA using only OCC-based PUSCH transmission of uplink transmission scheduled by a random access response (RAR), the threshold number of times of the RA includes only the number of times of contention resolution failure.

[0055] In some embodiments of the second aspect, the number of times of contention resolution failure includes any one of the following: the number of times of not receiving a message 4 (Msg4); the number of times of receiving the Msg4 but failing in contention resolution.

[0056] In some embodiments of the second aspect, for the RA using one or more of the following, the threshold number of times of the RA includes the number of times of unsuccessfully receiving a random access response (RAR) and the number of times of contention resolution failure: OCC-based physical random access channel (PRACH) enhancement; OCC-based narrowband (NB) PRACH enhancement; OCC-based physical uplink shared channel (PUSCH) transmission MsgA; OCC-based NB PUSCH transmission MsgA; OCC-based PUSCH transmission of uplink transmission scheduled by a RAR; OCC-based NB PUSCH transmission of uplink transmission scheduled by a RAR.

[0057] In a third aspect, the embodiments of the present disclosure provide a terminal, comprising: one or more processors; wherein the terminal is configured to perform the optional implementation of the random access method of the first aspect.

[0058] In a fourth aspect, the embodiments of the present disclosure provide a communication system, the communication system comprising: a network device, a terminal; wherein the terminal is configured to perform the method described in the optional implementation of the first aspect.

[0059] In a fifth aspect, the embodiments of the present disclosure provide a storage medium, the storage medium storing instructions which, when executed on a communication device, cause the communication device to perform the method described in the first aspect and the optional implementation of the first aspect.

[0060] In a sixth aspect, the embodiments of the present disclosure provide a program product, the program product, when executed by a communication device, causes the communication device to perform the method described in the first aspect and the optional implementation of the first aspect.

[0061] In a seventh aspect, the embodiments of the present disclosure provide a computer program, when executed on a computer, causes the computer to perform the method described in the first aspect and the optional implementation of the first aspect.

[0062] In an eighth aspect, the embodiments of the present disclosure provide a chip or chip system. The chip or chip system comprises processing circuitry configured to perform the method described in the first aspect and the optional implementation of the first aspect.

[0063] It can be understood that the access network device, the terminal, the communication system, the storage medium, the program product, the computer program, the chip or the chip system are all used to perform the method proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved are referred to the beneficial effects in the corresponding method, which will not be described here.

[0064] The embodiments of the present disclosure propose a random access method. In some embodiments, the terms of the random access method, the measurement method, the communication method, the configuration method, etc. can be replaced with each other, the terms of the communication device and the configuration device, the measurement device, the random access device, etc. can be replaced with each other, and the terms of the communication system, the configuration system, the measurement system, the random access system, etc. can be replaced with each other.

[0065] The embodiments of the present disclosure are not exhaustive, but only illustrate some embodiments, and are not specific limitations on the protection scope of the present disclosure. In the case of no contradiction, each step in an embodiment can be implemented as an independent embodiment, and the steps can be combined arbitrarily, for example, the scheme after removing some steps in an embodiment can also be implemented as an independent embodiment, and the order of the steps in an embodiment can be exchanged arbitrarily, in addition, the optional implementation in an embodiment can be combined arbitrarily; in addition, the embodiments can be combined arbitrarily, for example, the steps of different embodiments or part of the steps of different embodiments can be combined arbitrarily, an embodiment can be combined with the optional implementation of other embodiments.

[0066] In the embodiments of the present disclosure, the terms and / or descriptions among the embodiments are consistent and can be referred to each other if there is no special description and logical conflict, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0067] The terms used in the embodiments of the present disclosure are only for the purpose of describing particular embodiments and are not used as limitations of the present disclosure.

[0068] In the embodiments of the present disclosure, unless otherwise specified and logically conflicted, the elements expressed in singular form, such as "one", "one kind", "the", "the above", "the above", "the above", "this" and the like, can represent "one and only one", and can also represent "one or more", "at least one" and the like. For example, in the case of using articles such as "a", "an", "the" and the like in English, the noun after the article can be understood as singular expression, and can also be understood as plural expression.

[0069] In the embodiments of the present disclosure, "plurality" refers to two or more.

[0070] In some embodiments, the terms "at least one of", "one or more", "a plurality of", "multiple" and the like can be replaced with each other.

[0071] In some embodiments, the writing manner of "at least one of A, B", "A and / or B", "A in one case and B in another case", "A in response to one case and B in response to another case" and the like can include the following technical solutions according to the case: A in some embodiments (A is executed regardless of B); B in some embodiments (B is executed regardless of A); A and B are selectively executed in some embodiments (A and B are selected from A and B); A and B are executed in some embodiments (A and B are executed). When there are more branches of A, B, C and the like, it is similar to the above.

[0072] In some embodiments, the writing manner of "A or B" and the like can include the following technical solutions according to the case: A in some embodiments (A is executed regardless of B); B in some embodiments (B is executed regardless of A); A and B are selectively executed in some embodiments (A and B are selected from A and B). When there are more branches of A, B, C and the like, it is similar to the above.

[0073] The prefix words of "first", "second" and the like in the embodiments of the present disclosure are merely used to distinguish different description objects, and do not constitute limitation on the position, order, priority, quantity or content of the description objects. The description objects are described in the claims or embodiments, and should not be construed as redundant limitation because of the use of the prefix words. For example, the description object is "field", and the ordinal words before "field" in "first field" and "second field" do not limit the position or order between "fields", and "first" and "second" do not limit whether the "fields" modified thereby are in the same message or not, nor limit the order of "first field" and "second field". For another example, the description object is "level", and the ordinal words before "level" in "first level" and "second level" do not limit the priority between "levels". For another example, the quantity of the description object is not limited by the ordinal words, and can be one or more. For example, "first device", wherein the quantity of "device" can be one or more. In addition, the objects modified by different prefix words can be the same or different, for example, the description object is "device", and "first device" and "second device" can be the same device or different devices, and the types thereof can be the same or different. For another example, the description object is "information", and "first information" and "second information" can be the same information or different information, and the contents thereof can be the same or different.

[0074] In some embodiments, "including A", "containing A", "for indicating A", "carrying A" can be interpreted as directly carrying A, or indirectly indicating A.

[0075] In some embodiments, the terms of "in response to", "in response to determining", "in the case of", "when", "when", "if", "if" and the like can be replaced with each other.

[0076] In some embodiments, the terms of "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not lower than", "above" and the like can be replaced with each other, and the terms of "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", "below" and the like can be replaced with each other.

[0077] In some embodiments, the apparatuses and devices can be interpreted as entities, and also as virtual, whose names are not limited to the names described in the embodiments, and in some cases can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0078] In some embodiments, "network (or network device)" can be interpreted as an apparatus included in a network, for example, an access network device, a core network device, etc.

[0079] In some embodiments, "access network device (AN device)" can also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", and in some embodiments can also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

[0080] In some embodiments, a "terminal" or "terminal device" can be referred to as a "user equipment" (UE), a "user terminal," a "mobile station" (MS), a "mobile terminal" (MT), a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, and / or the like.

[0081] In some embodiments, data, information and / or the like can be obtained in compliance with laws and regulations of a country where a location is situated.

[0082] In some embodiments, data, information and / or the like can be obtained after consent of a user is obtained.

[0083] FIG. 1 is an architecture diagram of a communication system, according to an embodiment of the present disclosure.

[0084] As shown in FIG. 1, the communication system 100 includes a terminal 101 and a network device 102.

[0085] In some embodiments, the terminal 101 includes at least one of a mobile phone, a wearable device, an Internet of Things device, a communication-capable automobile, a smart automobile, a tablet (Pad), a wireless-transmitting computer, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, a wireless terminal device in a smart home, and the like, but is not limited thereto.

[0086] In some embodiments, the network device 102 can include at least one of an access network device 1021 and a core network device 1022.

[0087] In some embodiments, the access network device 1021 is at least one of a node or a device that accesses a terminal to a wireless network, for example, and can include an evolved NodeB (eNB) in a 5G communication system, a next generation eNB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved node B (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an Open RAN, a Cloud RAN, a base station in other communication systems, an access node in a Wi-Fi system, and the like, but is not limited thereto.

[0088] In some embodiments, the technical solutions of the present disclosure can be applied to an Open RAN architecture, at this time, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can become internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0089] In some embodiments, the access network device 1021 can be composed of a central unit (CU) and a distributed unit (DU), where the CU can also be referred to as a control unit. The CU-DU structure can split the protocol layers of the access network device, and some protocol layer functions are controlled by the CU, and the remaining or all protocol layer functions are distributed in the DU and controlled by the CU, but not limited thereto.

[0090] In some embodiments, the core network device 1022 can be one device including one or more network elements, or a plurality of devices or device groups including all or part of the above one or more network elements. The network element can be virtual or physical. The core network includes at least one of an evolved packet core (EPC), a 5G core network (5GCN), and a next-generation core (NGC).

[0091] It can be understood that the communication system described in the embodiments of the present disclosure is for more clearly illustrating the technical solutions of the present disclosure, and does not constitute a limitation on the technical solutions proposed in the present disclosure. It can be understood by those skilled in the art that, as the system architecture evolves and new business scenarios appear, the technical solutions proposed in the present disclosure are also applicable to similar technical problems.

[0092] The following embodiments of the present disclosure can be applied to the communication system 100 shown in FIG. 1 or part of the subject, but are not limited thereto. The subjects shown in FIG. 1 are examples, and the communication system can include all or part of the subjects in FIG. 1, or include other subjects other than those in FIG. 1. The number and form of each subject is arbitrary, each subject can be physical or virtual, the connection relationship between each subject is an example, each subject can not be connected or can be connected, and the connection can be in any way, can be direct connection or indirect connection, can be wired connection or wireless connection.

[0093] Embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (Bluetooth (registered trademark)), Public Land Mobile Network (PLMN) network, Device-to-Device (D2D) system, Machine to Machine (M2M) system, Internet of Things (IoT) system, Vehicle-to-Everything (V2X), system using other communication methods, next-generation system expanded based thereon, and the like. Further, a plurality of systems can be applied in combination (for example, combination of LTE or LTE-A and 5G, and the like).

[0094] In the field of communication technology, for non-terrestrial networks (NTN), due to the very wide coverage of NTN satellites, considering the device density, it is expected that there will be a large number of terminals in the coverage of the satellite. Especially for low-orbit satellites, during the satellite coverage, there may be a large number of covered terminals successfully transmitting the required data, which means that the satellite resources need to be quickly accessed and released.

[0095] However, since the total spectrum resources available to the network will be limited, especially in the early stages of new radio (NR) NTN deployment, further resource multiplexing granularity can significantly improve the capacity efficiency of the system.

[0096] Uplink transmission is also involved in the random access (RA) procedure, such as the transmission of the preamble, the payload of the message A (MsgA) of the 2-step RA, the uplink transmission scheduled by the random access response (RAR) in the 4-step contention-based random access (CBRA) and the 4-step contention-free random access (CFRA), etc. Therefore, in the RA procedure, it is also necessary to allocate as much available resource as possible to each terminal to serve as many terminals as possible. That is, in the RA procedure, the uplink capacity of the physical random access channel (PRACH) and / or the physical uplink shared channel (PUSCH) also needs to be considered.

[0097] However, in the RA procedure, when uplink capacity enhancement (such as based on orthogonal cover code (OCC)) is used, since multiple terminals use the same resource for uplink transmission, the interference-to-noise ratio (INR) will seriously affect the reception demodulation performance. Therefore, not in all cases can always rely on uplink capacity enhancement for random access, and when the INR is relatively high, it needs to be able to fall back to the legacy random access procedure.

[0098] To this end, the disclosure provides a method for a terminal to perform a RA procedure from a manner using uplink capacity boosting (or enhancement), and fallback to a RA procedure without uplink capacity enhancement. Thus, on the basis of improving the uplink available capacity of the system in the random access stage, the flexibility and reliability of the RA procedure are improved.

[0099] FIG. 2A is an interaction schematic diagram of a random access method according to an embodiment of the disclosure. As shown in FIG. 2A, the embodiment of the disclosure relates to a random access method for a terminal 101 and a network device 102, and the method comprises:

[0100] In step S2101, the terminal 101 determines the number of times of unsuccessfully receiving RAR in a RA procedure using uplink capacity boosting technology.

[0101] In some embodiments, the RA procedure using uplink capacity boosting technology by the terminal 101 comprises any one of the following: PRACH enhancement based on orthogonal cover code OCC; NPRACH enhancement based on OCC; PUSCH sending MsgA based on OCC; NPUSCH sending MsgA based on OCC.

[0102] In some embodiments, the terminal 101 can only determine the number of times of unsuccessfully receiving RAR in a RA procedure using OCC as the number of attempts in a RA procedure using OCC.

[0103] In some embodiments, the terminal 101 can only determine the number of times of unsuccessfully receiving RAR.

[0104] In some embodiments, the terminal 101 can be in an idle state, or an inactive state, or a connected state.

[0105] In some embodiments, the terminal 101 can be an NR NTN terminal, or an IOT NTN terminal, or a 6G NTN terminal.

[0106] In some embodiments, the terms “NR”, “new radio”, “new radio” and the like can be replaced with each other.

[0107] In some embodiments, the terms “NTN”, “non-terrestrial network”, “Non-Terrestrial Networks” and the like can be replaced with each other.

[0108] In some embodiments, the terminal 101 can be a RedCap NTN terminal or a non-RedCap NTN terminal.

[0109] In some embodiments, the technical terms “Reduced Capability UE”, “RedCap UE”, “RedCap terminal”, “capability limited terminal”, etc. can be replaced by each other.

[0110] In some embodiments, the technical terms “non Reduced Capability UE”, “non-RedCap UE”, “non-RedCap terminal”, “non-capability limited terminal”, etc. can be replaced by each other.

[0111] In some embodiments, the technical terms “OCC”, “Orthogonal coverage code”, “Orthogonal coverage code”, etc. can be replaced by each other.

[0112] In some embodiments, the technical terms “use Uplink capacity improvement”, “use Uplink capacity enhancement”, “use Uplink capacity improvement”, “use Uplink capacity enhancement”, “consider Uplink capacity enhancement”, “consider Uplink capacity improvement”, “concern Uplink capacity improvement”, “use Uplink capacity improvement”, etc. can be replaced by each other.

[0113] In some embodiments, the RA using Uplink capacity improvement techniques can be 2-step RA, or can be 4-step RA.

[0114] In some embodiments, the technical terms “2-step RA”, “2-step Random Access”, “2step Random Access”, etc. can be replaced by each other.

[0115] In some embodiments, the RA can be 2-step CFRA, or can be 2-step CBRA.

[0116] In some embodiments, the 4-step RA can be 4-step CFRA, or can be 4-step CBRA.

[0117] In some embodiments, the technical terms “Contention-Free Random Access”, “CFRA”, “NCRA”, “Non-contention Random Access”, etc. can be replaced by each other.

[0118] In some embodiments, the technical terms “Contention-based Random Access”, “CBRA”, etc. can be replaced by each other.

[0119] In some embodiments, the terms “2-step CFRA,” “2-step Contention-Free Random Access,” “2step Contention-Free Random Access,” “2step Non-contention Random Access,” “2-step NCRA,” and the like can be replaced with each other.

[0120] In some embodiments, the terms “2-step CBRA,” “2-step Contention-Based Random Access,” and the like can be replaced with each other.

[0121] In some embodiments, the terms “RAR,” “Random Access Response,” “Random Access Response,” and the like can be replaced with each other.

[0122] In some embodiments, the terms “PRACH,” “Physical Random Access Channel,” “Physical Random Access channel,” and the like can be replaced with each other.

[0123] In some embodiments, the terms “NPRACH,” “narrowband Physical Random Access Channel,” “narrowband Physical Random Access channel,” and the like can be replaced with each other.

[0124] In some embodiments, the terms “PUSCH,” “Physical uplink shared channel,” “Physical uplink shared channel,” and the like can be replaced with each other.

[0125] In some embodiments, the terms “NPUSCH,” “narrowband Physical uplink shared channel,” “narrowband Physical uplink shared channel,” and the like can be replaced with each other.

[0126] In some embodiments, OCC-based PUSCH transmission MsgA can be based on OCC-based PUSCH transmission MsgA payload.

[0127] In the embodiments of the present disclosure, since only OCC-based PRACH (NPRACH) enhancement or only OCC-based PUSCH (NPUSCH) enhancement is used in the RA process, whether the RA attempt using the uplink capacity enhancement technology is successful can only be reflected by whether the RAR is successfully received. Therefore, in the present disclosure, the number of RA attempts using the uplink capacity enhancement technology is determined only by whether the RAR is successfully received. In this way, the accuracy and reliability of determining the number of RA attempts using the uplink capacity enhancement technology are improved, which provides a condition for accurately determining the fallback occasion.

[0128] For example, if N (N is a positive integer) RA processes are initiated by using only OCC-based PRACH enhancement, but the RAR is not successfully received in the N RA processes, it can be determined that the number of RA attempts using the uplink capacity enhancement technology is N.

[0129] In step S2102, the terminal 101 determines the number threshold according to the selected coverage enhancement level.

[0130] In some embodiments, the terms "coverage enhancement", "coverage enhancement" and "CE" can be replaced with each other.

[0131] In some embodiments, the coverage enhancement level selected by the terminal 101 can be the coverage enhancement level selected by the terminal 101 when performing RA using the uplink capacity enhancement technology (such as using OCC).

[0132] In some embodiments, the terminal 101 can select the coverage enhancement level based on the reference signal receiving power (RSRP).

[0133] In some embodiments, the number threshold corresponding to different coverage enhancement levels can be different or the same, and the present disclosure does not limit this.

[0134] In some embodiments, the terminal 101 can determine the number threshold corresponding to different coverage enhancement levels according to the protocol agreement.

[0135] In some embodiments, the terminal 101 can also determine the number threshold corresponding to different coverage enhancement levels according to the indication of the network device.

[0136] In some embodiments, the number threshold corresponding to different coverage enhancement levels can also be pre-configured in the terminal 101.

[0137] In some embodiments, the terminal 101 can also determine the number threshold according to whether the cell attempted to access is a coverage enhancement cell,

[0138] That is, the coverage enhancement cell and the non-coverage enhancement cell can correspond to different number thresholds respectively. Thus, the terminal 101 can determine the number threshold according to whether the cell attempting to access is a coverage enhancement cell.

[0139] In some embodiments, the number thresholds corresponding to the coverage enhancement cell and the non-coverage enhancement cell respectively can be agreed by the protocol, can be indicated by the network device 102, or can be pre-configured in the terminal 101, and the disclosure does not limit this.

[0140] The above steps S2101 and S2102 can be executed simultaneously, or the step S2102 can be executed first, and then the step S2101 can be executed, and the disclosure does not limit this.

[0141] Step S2103, in the case where the number of times of unsuccessfully receiving the RAR is greater than the number threshold, the uplink capacity enhancement technology is not used for the RA.

[0142] In some embodiments, not using the uplink capacity enhancement technology for the RA includes: the terminal selects a coverage enhancement level as a first coverage enhancement level, and uses the RA resource without using the OCC and the first coverage enhancement level for the RA; or,

[0143] The terminal selects a coverage enhancement level as a first coverage enhancement level, and the terminal is not configured with the RA resource without using the OCC and the first coverage enhancement level, and uses the RA resource without using the OCC and the non-coverage enhancement for the RA.

[0144] In some embodiments, the first coverage enhancement level can be any type of coverage enhancement level in the communication system. For example, for a narrow band Internet of Things (NB-IoT) system, the first coverage enhancement level can be a coverage increase level 0 (CE Level 0), or can be a CE Level 1, or can be a CE Level 2, and the disclosure does not limit this.

[0145] That is, when the terminal 101 determines the cell coverage enhancement level as the first coverage enhancement level when using the uplink capacity enhancement technology for random access, the terminal 101 can select the random access resource without using the uplink capacity enhancement and the first coverage enhancement level for random access when falling back to not using the uplink capacity enhancement technology for the RA. If the random access resource without using the uplink capacity enhancement and the first coverage enhancement level is not found, the terminal 101 can use the random access resource without using the uplink capacity enhancement and the non-coverage enhancement for the RA.

[0146] For example, in a case that the terminal selects the first coverage enhancement level, and the number of times of unsuccessfully receiving the RAR is greater than the number threshold, when the terminal only uses the OCC-based PUSCH to send the payload of the MsgA, the terminal can select the RA resource of the first coverage enhancement level without using the OCC to perform the RA. If the RA resource of the first coverage enhancement level without using the OCC is not found, the terminal can use the RA resource without using the OCC and without coverage enhancement to perform the RA.

[0147] The random access method related to the embodiments of the present disclosure can include at least one of steps S2101 to S2103. For example, step S2102 can be implemented as an independent embodiment, steps S2101+S2103 can be implemented as an independent embodiment, steps S2102+step S2103 can be implemented as an independent embodiment, and the like, but are not limited thereto.

[0148] In the embodiments of the present disclosure, part or all of the steps, and optional implementation manners thereof, can be combined with part or all of the steps in other embodiments, or can be combined with optional implementation manners of other embodiments.

[0149] In the embodiments of the present disclosure, each step can also be independently implemented.

[0150] In the present embodiment, in a case that the terminal performs the RA by using the uplink capacity enhancement technology, and the number of times of unsuccessfully receiving the RAR is greater than the number threshold, the terminal can fall back to performing the RA without using the uplink capacity enhancement technology. In this way, on the basis of improving the uplink capacity in the random access process, the reliability and success rate of the RA are ensured, and the reliability of the communication system is improved.

[0151] FIG. 2B is an interaction schematic diagram of a random access method according to an embodiment of the present disclosure. As shown in FIG. 2B, the embodiments of the present disclosure relate to a random access method for a terminal 101 and a network device 102, and the above method includes:

[0152] In step S2201, the terminal 101 determines the number of times of contention resolution failures for the RA of using the OCC-based PUSCH to send the uplink transmission scheduled by the RAR.

[0153] In some embodiments, for the 4-step CBRA, the uplink transmission scheduled by the RAR can be the Msg3. That is, for the case of using the OCC-based PUSCH to send the Msg3 for the 4-step CBRA, the number of times of attempting to perform the RA by using the uplink capacity enhancement technology can be determined only according to the number of times of contention resolution failures.

[0154] In some embodiments, the terms "contention resolution", "contention resolution" and the like can be replaced by each other.

[0155] In some embodiments, the terminal 101 can only determine the number of times of contention resolution failure.

[0156] Since in the contention-based random access (CBRA, Contention-Based Random Access) process, when multiple terminals randomly select the same RA preamble (Preambles) from the shared preamble pool, they will receive the same RAR. These terminals will then send the uplink transmission scheduled by the RAR on the same uplink UL time / frequency resource. At this time, the network device needs to resolve the contention between these terminals to determine which terminal can successfully access the network. In the embodiments of the present disclosure, since the uplink capacity enhancement technology is only used in the process of sending the uplink transmission scheduled by the RAR, for the number of attempts of RA using the uplink capacity enhancement technology, it cannot be determined according to the number of times of receiving the RAR, but only according to the number of times of contention resolution failure. Therefore, the accuracy and reliability of determining the number of attempts of RA using the uplink capacity enhancement technology are ensured, which provides a condition for accurately determining the time to fall back to RA without using the uplink capacity enhancement technology, and improves the success rate of RA.

[0157] In some embodiments, the number of times of contention resolution failure includes any of the following: the number of times of not receiving message 4 Msg4; the number of times of receiving Msg4 but failing in contention resolution.

[0158] That is, the contention resolution failure can be that the terminal considers it as a contention resolution failure when it does not receive message 4; or, it can also be that although Msg4 is received, random access failure still occurs, so it can also be considered as a contention resolution failure, which is not limited by the present disclosure.

[0159] Step S2202, the terminal 101 determines the number threshold according to the selected coverage enhancement level.

[0160] The above steps S2201 and S2202 can be executed simultaneously, or step S2202 can be executed first, and then step S2201, which is not limited by the present disclosure.

[0161] Step S2203, in the case where the number of times of contention resolution failure is greater than the number threshold, RA is not performed using the uplink capacity enhancement technology.

[0162] The detailed description of the above steps S2202-S2203 can refer to steps S2102-S2103 in the embodiment shown in FIG. 2A, which will not be repeated here.

[0163] The random access method related in the embodiments of the present disclosure can include at least one of steps S2201 to S2203. For example, step S2202 can be implemented as an independent embodiment, steps S2201+S2203 can be implemented as an independent embodiment, steps S2202+step S2203 can be implemented as an independent embodiment, and the like, but are not limited thereto.

[0164] In the embodiments of the present disclosure, part or all of the steps, and optional implementation manners thereof, can be combined with part or all of the steps in other embodiments, or can be combined with optional implementation manners of other embodiments.

[0165] In the embodiments of the present disclosure, each step can also be independently implemented.

[0166] In the present embodiment, in the RA of the terminal using OCC for PUSCH transmission of uplink transmission scheduled by RAR, when the number of contention resolution failures is greater than the number threshold, the terminal can fall back to the RA without using OCC. Thereby, on the basis of improving the uplink capacity in the random access process, the reliability and success rate of the RA are ensured, and the reliability of the communication system is improved.

[0167] FIG. 2C is an interaction schematic diagram of a random access method according to an embodiment of the present disclosure. As shown in FIG. 2C, the embodiments of the present disclosure relate to a random access method for a terminal 101 and a network device 102, and the above method includes:

[0168] Step S2301, the terminal 101 determines the number of unsuccessful RAR receptions and the number of contention resolution failures in the process of performing RA using the uplink capacity improvement technology.

[0169] In some embodiments, the process of the terminal 101 performing RA using the uplink capacity improvement technology can include the process of performing RA using the OCC. The process of performing RA using the OCC can include one or more of the following RA: OCC-based PRACH enhancement; OCC-based NPRACH enhancement; OCC-based PUSCH transmission of MsgA; OCC-based NPUSCH transmission of MsgA; OCC-based RA of PUSCH transmission of uplink transmission scheduled by RAR; OCC-based NPUSCH transmission of uplink transmission scheduled by RAR.

[0170] In some embodiments, the terminal 101 can determine the sum of the number of unsuccessful RAR receptions and the number of contention resolution failures as the number of attempts of performing RA using the uplink capacity improvement technology.

[0171] In some embodiments, if the terminal 101 employs the OCC-based PRACH (or NPRACH) enhancement and the OCC-based PUSCH (or NPUSCH) to send the payload of MsgA in the random access procedure, the number of attempts of RA employing the uplink capacity boosting technique can be determined, including the number of times of unsuccessfully receiving RAR and the number of times of contention resolution failure.

[0172] In some embodiments, if the terminal 101 employs the OCC-based PRACH (or NPRACH) enhancement and the OCC-based PUSCH (or NPUSCH) to send the payload of MsgA in the random access procedure, the number of attempts of RA employing the uplink capacity boosting technique can be determined, including the number of times of unsuccessfully receiving RAR and the number of times of contention resolution failure.

[0173] In the embodiments of the present disclosure, if the PRACH (or NPRACH) and the PUSCH (or NPUSCH) in the RA procedure both employ the uplink capacity boosting technique (for example, both employ the OCC-based enhancement), the number of times of unsuccessfully receiving RAR can reflect the number of times of the OCC-based PRACH (or NPRACH) enhancement, and the number of times of contention resolution failure can reflect the number of times of the OCC-based PUSCH (or NPUSCH) enhancement. Therefore, in the present disclosure, the number of attempts of RA employing the uplink capacity boosting technique can be determined, including the number of times of unsuccessfully receiving RAR and the number of times of contention resolution failure. Thus, the accuracy and reliability of the determined number of attempts of RA employing the uplink capacity boosting technique are ensured, which provides a condition for accurately determining the timing of falling back to RA without employing the uplink capacity boosting technique, improves the success rate of RA, and improves the performance of the communication system.

[0174] In step S2302, the terminal 101 determines the number threshold according to the selected coverage enhancement level.

[0175] The above steps S2301 and S2302 can be performed simultaneously, or the step S2302 can be performed first and then the step S2301, which is not limited in the present disclosure.

[0176] In step S2303, if the sum of the number of times of unsuccessfully receiving RAR and the number of times of contention resolution failure is greater than the number threshold, RA is not performed by employing the uplink capacity boosting technique.

[0177] The detailed description of the above steps S2302-S2303 can refer to the steps S2102-S2103 in the embodiment shown in FIG. 2A, which will not be described here.

[0178] The random access method related in the embodiments of the present disclosure can include at least one of steps S2301 to S2303. For example, step S2302 can be implemented as an independent embodiment, steps S2301+S2303 can be implemented as an independent embodiment, steps S2302+step S2303 can be implemented as an independent embodiment, and the like, but are not limited thereto.

[0179] In the embodiments of the present disclosure, part or all of the steps, and optional implementation manners thereof, can be combined with part or all of the steps in other embodiments, or can be combined with optional implementation manners of other embodiments.

[0180] In the embodiments of the present disclosure, each step can also be independently implemented.

[0181] In the present embodiment, in the RA in which the terminal transmits the uplink transmission scheduled by the RAR by using the OCC-based PRACH and the OCC-based PUSCH (or transmits the payload of the MsgA by using the OCC-based PUSCH), when the sum of the number of times of unsuccessfully receiving the RAR and the number of times of contention resolution failure is greater than the number threshold, the terminal can fall back to the RA without using the OCC. Thus, on the basis of improving the uplink capacity in the random access process, the reliability and success rate of the RA are ensured, and the reliability of the communication system is improved.

[0182] FIG. 3A is a flow diagram of a random access method according to an embodiment of the present disclosure. As shown in FIG. 3A, the embodiments of the present disclosure relate to a random access method for a terminal, and the above method includes:

[0183] Step S3101, determining the number of times of unsuccessfully receiving the RAR in the process of performing the RA by using the uplink capacity improvement technology.

[0184] In some embodiments, the process of performing the RA by using the uplink capacity improvement technology includes any one of the following: OCC-based PRACH enhancement; OCC-based NPRACH enhancement; OCC-based PUSCH transmission of MsgA; OCC-based NPUSCH transmission of MsgA.

[0185] Step S3102, determining the number threshold according to the selected coverage enhancement level.

[0186] Step S3103, not performing the RA by using the uplink capacity improvement technology in the case where the number of times of unsuccessfully receiving the RAR is greater than the number threshold.

[0187] For detailed descriptions of steps S3101 to S3103, reference can be made to steps S2101 to S2103 in the embodiment shown in FIG. 2A, which will not be repeated here.

[0188] The random access method related in the embodiments of the present disclosure can include at least one of steps S3101-S3103. For example, step S3102 can be implemented as an independent embodiment, step S3102+step S3103 can be implemented as an independent embodiment, step S3101+step S3103 can be implemented as an independent embodiment, and the like, but are not limited thereto.

[0189] In the embodiments of the present disclosure, part or all of the steps, and the optional implementation manners thereof, can be combined with part or all of the steps in other embodiments, or can be combined with the optional implementation manners of other embodiments.

[0190] In the embodiments of the present disclosure, each step can also be implemented independently.

[0191] In the embodiment, when the terminal performs RA by using the uplink capacity enhancement technology, and the number of times of unsuccessfully receiving the RAR is greater than the number threshold, the terminal can fall back to performing RA without using the uplink capacity enhancement technology. Thus, on the basis of improving the uplink capacity in the random access process, the reliability and success rate of RA are ensured, and the reliability of the communication system is improved.

[0192] FIG. 3B is a flow diagram of a random access method according to an embodiment of the present disclosure. As shown in FIG. 3B, the embodiments of the present disclosure relate to a random access method for a terminal 101, and the above method includes:

[0193] Step S3201, for RA that only uses OCC-based PUSCH to send uplink transmission scheduled by RAR, determining the number of times of contention resolution failure.

[0194] Step S3202, according to the selected coverage enhancement level, determining the number threshold.

[0195] Step S3203, in the case where the number of times of contention resolution failure is greater than the number threshold, performing RA without using the OCC manner.

[0196] For detailed introduction of steps S3201-S3203, reference can be made to steps S2201-S2203 in the embodiment shown in FIG. 2B, which will not be repeated here.

[0197] The random access method related in the embodiments of the present disclosure can include at least one of steps S3201-S3203. For example, step S3202 can be implemented as an independent embodiment, step S3202+step S3203 can be implemented as an independent embodiment, step S3201+step S3203 can be implemented as an independent embodiment, and the like, but are not limited thereto.

[0198] In the embodiments of the present disclosure, part or all of the steps, and optional implementation manners thereof, can be combined with part or all of the steps in other embodiments, or can be combined with optional implementation manners of other embodiments.

[0199] In the embodiments of the present disclosure, each step can also be independently implemented.

[0200] In the present embodiment, in the RA of the terminal using OCC to send the uplink transmission scheduled by the RAR, when the number of contention resolution failures is greater than the number threshold, the RA can be performed in a manner without using OCC. Thus, on the basis of improving the uplink capacity in the random access process, the reliability and success rate of the RA are ensured, and the reliability of the communication system is improved.

[0201] FIG. 3C is a flow diagram of a random access method according to an embodiment of the present disclosure. As shown in FIG. 3C, the present embodiment relates to a random access method for a terminal 101, and the above method comprises:

[0202] Step S3301, in the process of performing RA in the OCC manner, determining the number of unsuccessful RAR receptions and the number of contention resolution failures.

[0203] In some embodiments, the process of performing RA in the OCC manner can include one or more of the following RA: OCC-based PRACH enhancement; OCC-based NPRACH enhancement; OCC-based PUSCH sending MsgA; OCC-based NPUSCH sending MsgA; OCC-based RA of PUSCH sending uplink transmission scheduled by RAR; OCC-based RA of NPUSCH sending uplink transmission scheduled by RAR.

[0204] Step S3302, determining the number threshold according to the selected coverage enhancement level.

[0205] Step S3303, in the case where the sum of the number of unsuccessful RAR receptions and the number of contention resolution failures is greater than the number threshold, performing RA in a manner without using OCC.

[0206] For detailed descriptions of steps S3301 to S3303, reference can be made to steps S2301 to S2303 in the embodiment shown in FIG. 2C, which will not be repeated here.

[0207] The random access method related in the embodiments of the present disclosure can include at least one of steps S3301-S3303. For example, step S3302 can be implemented as an independent embodiment, step S3302+step S3303 can be implemented as an independent embodiment, step S3301+step S3303 can be implemented as an independent embodiment, and the like, but are not limited thereto.

[0208] In the embodiments of the present disclosure, part or all of the steps, and optional implementation manners thereof, can be combined with part or all of the steps in other embodiments, or can be combined with optional implementation manners of other embodiments.

[0209] In the embodiments of the present disclosure, each step can also be implemented independently.

[0210] In the present embodiment, in the RA in which the terminal transmits the uplink transmission scheduled by the RAR by using the OCC-based PRACH and the OCC-based PUSCH (or transmits the payload of the MsgA by using the OCC-based PUSCH), when the sum of the number of times of unsuccessfully receiving the RAR and the number of times of contention resolution failure is greater than the number threshold, the terminal can fall back to the RA without using the OCC. Thus, on the basis of improving the uplink capacity in the random access process, the reliability and success rate of the RA are ensured, and the reliability of the communication system is improved.

[0211] FIG. 3D is a flow diagram of a random access method according to an embodiment of the present disclosure. As shown in FIG. 3D, the embodiments of the present disclosure relate to a random access method for a terminal 101, and the above method includes:

[0212] Step S3401, determining the number of attempts of random access RA by using the uplink capacity improvement technology.

[0213] In some embodiments, the method further includes:

[0214] According to the coverage enhancement level selected by the terminal, the number threshold is determined.

[0215] In some embodiments, the method further includes:

[0216] According to whether the cell accessed by the terminal is a coverage enhancement cell, the number threshold is determined.

[0217] In some embodiments, for the RA using only any one of the following, the number of attempts of the RA includes only the number of times of unsuccessfully receiving a random access response RAR: OCC-based physical random access channel PRACH enhancement; OCC-based narrowband NPRACH enhancement; OCC-based physical uplink shared channel PUSCH transmission of a message MsgA; OCC-based narrowband NPUSCH transmission of the MsgA.

[0218] In some embodiments, for RA employing OCC-based PUSCH transmission for uplink transmission scheduled by random access response (RAR), the number of attempts of the RA includes only the number of contention resolution failures.

[0219] In some embodiments, the number of contention resolution failures includes any of: the number of times of not receiving message 4 (Msg4); the number of times of receiving Msg4 but failing contention resolution.

[0220] In some embodiments, for RA employing one or more of: OCC-based physical random access channel (PRACH) enhancement; OCC-based narrowband (NB) PRACH enhancement; OCC-based physical uplink shared channel (PUSCH) transmission MsgA; OCC-based NB PUSCH transmission MsgA; OCC-based PUSCH transmission for uplink transmission scheduled by RAR; OCC-based NB PUSCH transmission for uplink transmission scheduled by RAR, the number of attempts of the RA includes the number of times of unsuccessfully receiving RAR and the number of contention resolution failures.

[0221] Step S3402, in case that the number of attempts is greater than the number threshold, the RA is not performed with the uplink capacity boosting technique.

[0222] In some embodiments, the not performing the RA with the uplink capacity boosting technique includes:

[0223] The terminal selects a coverage enhancement level as a first coverage enhancement level, and performs the RA using RA resources that do not employ the OCC and that are of the first coverage enhancement level; or

[0224] The terminal selects a coverage enhancement level as a first coverage enhancement level, and the terminal is not configured with RA resources that do not employ the OCC and that are of the first coverage enhancement level, and the terminal performs the RA using RA resources that do not employ the OCC and that are not of coverage enhancement.

[0225] The details of steps S3401-S3402 can refer to the above embodiment descriptions.

[0226] The following is an exemplary introduction to the above method.

[0227] A terminal initiates random access, the random access employs an uplink capacity boosting technique, and the terminal falls back to random access without the uplink capacity boosting technique when the number of random access attempts is greater than a threshold value.

[0228] Optionally, the random access is a contention-based random access (CBRA), or a contention-free random access (CFRA); the random access is a 2-step random access (2-Step RA), or a 4-step random access (4-step RA).

[0229] Optionally, the terminal is in an Idle state, or an inactive state, or a connected state. The terminal is a NR NTN terminal, or an IOT NTN terminal, or a 6G NTN terminal. The terminal can be a RedCap NTN terminal or a non-RedCap NTN terminal.

[0230] Optionally, the random access employs uplink capacity boosting techniques including PRACH / NPRACH transmission employing OCC-based uplink capacity boosting techniques, and / or MsgA PUSCH transmission employing OCC-based uplink capacity boosting techniques, and / or Msg3 transmission employing OCC-based uplink capacity boosting techniques.

[0231] Optionally, different attempt number threshold values can be configured for different coverage enhancement levels.

[0232] Optionally, one attempt number threshold value can be configured for coverage enhancement and another for non-coverage enhancement.

[0233] Optionally, if the corresponding coverage enhancement level for the terminal performing random access employing uplink capacity boosting is a first coverage enhancement level, the terminal reverts to performing random access without uplink capacity boosting, and still selects the random access resource corresponding to the first coverage enhancement level for random access attempt.

[0234] Optionally, if the corresponding coverage enhancement level for the terminal performing random access employing uplink capacity boosting is a first coverage enhancement level, if the network does not configure random access resources for the first coverage enhancement level, the terminal uses non-coverage enhancement random access resources for random access.

[0235] Optionally, for random access that only employs OCC-based PRACH / NPRACH enhancement or OCC-based PUSCH enhancement to send the payload of MsgA, the random access attempt number only includes random access attempts that are not successful in receiving RAR.

[0236] Optionally, for random access that only employs OCC-based PUSCH / NPUSCH enhancement to send msg3, the random access attempt number only includes random access attempts that fail contention resolution.

[0237] Optionally, the random access attempt number only includes random access attempts that do not receive msg4.

[0238] Optionally, the number of random access attempts includes only random access attempts that received msg4 but failed contention resolution.

[0239] Note: This mode is mainly for random access failure caused by congestion.

[0240] Optionally, for random access with OCC-based PRACH / NPRACH enhancement or OCC-based PUSCH enhancement for sending MsgA payload, and / or OCC-based PUSCH / NPUSCH enhancement for sending msg3, the number of random access attempts includes all random access attempts.

[0241] The embodiments of the present disclosure further provide a device for implementing any of the above methods, for example, a communication device, which comprises units or modules for implementing the steps performed by the terminal in any of the above methods.

[0242] It should be understood that the division of each unit or module in the above apparatus is only a logical function division, and all or part of them can be integrated into a physical entity or physically separated in actual implementation. In addition, the units or modules in the apparatus can be implemented in the form of processor calling software: for example, the apparatus includes a processor, the processor is connected with a memory, the memory stores instructions, and the processor calls the instructions stored in the memory to realize any of the above methods or realize the functions of each unit or module of the above apparatus, wherein the processor is a general processor such as a central processing unit (CPU) or a microprocessor, and the memory is a memory in the apparatus or a memory outside the apparatus. Alternatively, the units or modules in the apparatus can be implemented in the form of hardware circuit, and the functions of part or all of the units or modules can be realized by the design of hardware circuit. The above hardware circuit can be understood as one or more processors; for example, in one implementation, the above hardware circuit is an application-specific integrated circuit (ASIC), and the functions of part or all of the units or modules are realized by the design of the logical relationship of elements in the circuit; for another example, in another implementation, the above hardware circuit is a programmable logic device (PLD), and a field programmable gate array (FPGA) is taken as an example, which can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by a configuration file, so as to realize the functions of part or all of the above units or modules. All units or modules of the above apparatus can be all implemented in the form of processor calling software, or all implemented in the form of hardware circuit, or part implemented in the form of processor calling software and the remaining part implemented in the form of hardware circuit.

[0243] In the embodiments of the present disclosure, the processor is a circuit with signal processing capability. In one implementation, the processor can be a circuit with instruction reading and running capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), a digital signal processor (DSP), or the like. In another implementation, the processor can implement certain functions through a logical relationship of a hardware circuit, and the logical relationship of the hardware circuit is fixed or can be reconfigured. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In the reconfigurable hardware circuit, the processor loads a configuration document to implement the configuration of the hardware circuit. It can be understood that the processor loads instructions to implement the functions of the above part or all units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), and the like.

[0244] FIG. 4 is a structural schematic diagram of a terminal according to an embodiment of the present disclosure. As shown in FIG. 4, the terminal 4100 can include at least one of a transceiver module 4101, a processing module 4102, and the like. The terminal 4100 can include:

[0245] The processing module 4102 is configured to determine a number of attempts of random access (RA) using an uplink capacity boosting technique.

[0246] The transceiver module 4101 is configured to perform the RA without using the uplink capacity boosting technique when the number of attempts is greater than a threshold number of attempts.

[0247] Optionally, the processing module 4102 is further configured to:

[0248] determine the threshold number of attempts according to a coverage enhancement level selected by the terminal.

[0249] Optionally, the transceiver module 4101 is further configured to:

[0250] The terminal selects a first coverage enhancement level, and uses the RA resource without using the OCC and with the first coverage enhancement level for the RA; or

[0251] The terminal selects a first coverage enhancement level, and the terminal is not configured with the RA resource without using the OCC and with the first coverage enhancement level, and uses the RA resource without using the OCC and without coverage enhancement for the RA.

[0252] Optionally, the processing module 4102 is further configured to:

[0253] The number threshold is determined according to whether the cell accessed by the terminal is a coverage enhancement cell.

[0254] Optionally, for the RA using only any one of the following, the number of attempts of the RA includes only the number of times of unsuccessfully receiving a random access response RAR: OCC-based physical random access channel PRACH enhancement; OCC-based narrowband NPRACH enhancement; OCC-based physical uplink shared channel PUSCH transmission message MsgA; OCC-based narrowband NPUSCH transmission MsgA.

[0255] Optionally, for the RA using only OCC-based PUSCH transmission of uplink transmission scheduled by a random access response RAR, the number of attempts of the RA includes only the number of times of contention resolution failure.

[0256] Optionally, the number of times of contention resolution failure includes any one of the following: the number of times of not receiving a message 4 Msg4; the number of times of receiving the Msg4 but failing in contention resolution.

[0257] Optionally, for the RA using one or more of the following, the number of attempts of the RA includes the number of times of unsuccessfully receiving a RAR and the number of times of contention resolution failure: OCC-based physical random access channel PRACH enhancement; OCC-based narrowband NPRACH enhancement; OCC-based physical uplink shared channel PUSCH transmission MsgA; OCC-based narrowband NPUSCH transmission MsgA; OCC-based PUSCH transmission of uplink transmission scheduled by a RAR; OCC-based NPUSCH transmission of uplink transmission scheduled by a RAR.

[0258] In some embodiments, the transceiver module can include a sending module and / or a receiving module, which can be separate or integrated together. Optionally, the transceiver module can be mutually replaced with a transceiver.

[0259] In some embodiments, the processing module can be one module, or can include multiple sub-modules. Optionally, the multiple sub-modules perform all or part of the steps required to be performed by the processing module, respectively. Optionally, the processing module can be mutually replaced with the processor.

[0260] FIG. 5A is a structural schematic diagram of a communication device 5100 according to an embodiment of the present disclosure. The communication device 5100 can be a network device, or a terminal, or a chip, a chip system, or a processor supporting the terminal to implement any of the above methods, etc. The communication device 5100 can be used to implement the methods described in the above method embodiments, and specific reference can be made to the descriptions in the above method embodiments.

[0261] As shown in FIG. 5A, the communication device 5100 includes one or more processors 5101. The processor 5101 can be a general-purpose processor or a special-purpose processor, etc., for example, can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can 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 programs, and process data of the programs. The communication device 5100 is used to implement any of the above methods.

[0262] In some embodiments, the communication device 5100 further includes one or more memories 5102 for storing instructions. Optionally, all or part of the memory 5102 can also be outside the communication device 5100.

[0263] In some embodiments, the communication device 5100 further includes one or more transceivers 5103. When the communication device 5100 includes one or more transceivers 5103, the transceiver 5103 performs at least one of the communication steps (such as steps S2103, steps S2203, etc., but not limited to) in the above methods, such as transmitting and / or receiving.

[0264] In some embodiments, the transceiver can include a receiver and / or a transmitter, which can be separate or integrated together. Optionally, the terms transceiver, transceiving unit, transceiver, transceiving circuit, etc. can be mutually replaced, the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc. can be mutually replaced, and the terms receiver, receiving unit, receiver, receiving circuit, etc. can be mutually replaced.

[0265] In some embodiments, the communication device 5100 can include one or more interface circuits 5104. Optionally, the interface circuits 5104 are connected to the memory 5102, and are configured to receive signals from the memory 5102 or other devices, and to send signals to the memory 5102 or other devices. For example, the interface circuits 5104 can read instructions stored in the memory 5102 and transmit the instructions to the processor 5101.

[0266] The communication device 5100 described in the above embodiments can be a terminal or a network device or a third entity, but the scope of the communication device 5100 described in the present disclosure is not limited thereto, and the structure of the communication device 5100 can not be limited by FIG. 5A. The communication device can be a standalone device or can be part of a larger device. For example, the communication device can be: (1) a standalone integrated circuit (IC), or a chip, or a chip system or subsystem; (2) a set of one or more ICs, which can optionally also include storage components for storing data, programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, a smart terminal device, a cellular phone, a wireless device, a handset, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, and the like; (6) other devices, and the like.

[0267] FIG. 5B is a structural diagram of a chip 5200 according to an embodiment of the present disclosure. For the case where the communication device 5100 is a chip or a chip system, the structural diagram of the chip 5200 shown in FIG. 5B can be referred to, but is not limited thereto.

[0268] The chip 5200 includes one or more processors 5201, and the chip 5200 is configured to execute any of the above methods.

[0269] In some embodiments, the chip 5200 further includes one or more interface circuits 5202. Optionally, the interface circuits 5202 are connected to the memory 5203, and the interface circuits 5202 can be configured to receive signals from the memory 5203 or other devices, and to send signals to the memory 5203 or other devices. For example, the interface circuits 5202 can read instructions stored in the memory 5203 and transmit the instructions to the processor 5201.

[0270] In some embodiments, the interface circuits 5202 perform at least one of the communication steps (such as step S2103, step S2303, but not limited thereto) in the above methods, and the like.

[0271] In some embodiments, the terms interface circuit, interface, transceiver pin, and transceiver can be replaced with each other.

[0272] In some embodiments, chip 5200 also includes one or more memories 5203 for storing instructions. Optionally, all or part of memory 5203 can be outside of chip 5200.

[0273] The disclosure also proposes a storage medium having stored thereon instructions which, when executed on communication device 5100, cause communication device 5100 to perform any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto, and can also be a storage medium readable by other apparatuses. Optionally, the storage medium can be a non-transitory storage medium, but is not limited thereto, and can also be a transitory storage medium.

[0274] The disclosure also proposes a program product which, when executed by communication device 5100, causes communication device 5100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0275] The disclosure also proposes a computer program which, when executed on a computer, causes the computer to perform any of the above methods.

Claims

1. A random access method, characterized in that: The method is executed by a terminal, and includes: Determine the number of random access (RA) attempts using uplink capacity enhancement technology; When the number of attempts is greater than the number threshold, the uplink capacity improvement technology is not used to perform RA.

2. The method according to claim 1, wherein The method further comprises: The number threshold is determined according to the coverage enhancement level selected by the terminal.

3. The method according to claim 2, wherein The RA is performed without using the uplink capacity improvement technology, including: The coverage enhancement level selected by the terminal is the first coverage enhancement level, and RA is performed using RA resources that do not use orthogonal cover codes OCC and have the first coverage enhancement level; or, The coverage enhancement level selected by the terminal is the first coverage enhancement level, and the terminal is not configured with RA resources that do not adopt the OCC and have the first coverage enhancement level, and uses RA resources that do not adopt the OCC and are not coverage enhanced to perform RA.

4. The method according to claim 1, wherein The method further comprises: The number threshold is determined according to whether the cell that the terminal attempts to access is a coverage enhanced cell.

5. The method according to any one of claims 1 to 4, characterized in that: For RAs that use only any of the following, the number of RA attempts includes only the number of unsuccessful random access responses (RARs): OCC-based physical random access channel (PRACH) enhancement; OCC-based narrowband NPRACH enhancement; OCC-based physical uplink shared channel (PUSCH) sending message MsgA; MsgA is sent based on the narrowband NPUSCH of OCC.

6. The method according to any one of claims 1 to 4, characterized in that: For an RA that uses only an OCC-based PUSCH to send uplink transmissions scheduled by a random access response (RAR), the number of RA attempts only includes the number of contention resolution failures.

7. The method according to claim 6, wherein The number of contention resolution failures includes any one of the following: the number of times that message 4 Msg4 is not received; the number of times that Msg4 is received but contention resolution fails.

8. The method according to any one of claims 1 to 4, characterized in that: For RA that adopts one or more of the following items, the number of RA attempts includes the number of unsuccessful RAR receptions and the number of contention resolution failures: OCC-based physical random access channel PRACH enhancement; OCC-based narrowband NPRACH enhancement; OCC-based physical uplink shared channel PUSCH sending MsgA; OCC-based narrowband NPUSCH sending MsgA; OCC-based PUSCH sending RA for uplink transmission scheduled by RAR, and OCC-based NPUSCH sending RA for uplink transmission scheduled by RAR.

9. A terminal, characterized in that: The terminal includes: A processing module, configured to determine a number of attempts to perform random access (RA) using an uplink capacity improvement technology; The transceiver module is configured to not use the uplink capacity improvement technology to perform RA when the number of attempts is greater than a number threshold.

10. A terminal, characterized in that: include: one or more processors; The terminal is used to execute the random access method according to any one of claims 1 to 8.

11. A communication system, characterized in that: The invention comprises a network device and a terminal, wherein the terminal is configured to implement the random access method according to any one of claims 1 to 8.

12. A storage medium storing instructions, characterized in that: When the instruction is executed on a communication device, the communication device is caused to perform the random access method according to any one of claims 1 to 8.

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