Random access method and device

Abstract

Disclosed in embodiments of the present disclosure are a random access (RA) method and a device. The method performed by a terminal comprises: determining a plurality of RA resources; and using the plurality of RA resources to respectively perform a plurality of uplink transmissions, wherein the plurality of uplink transmissions carry a same message MsgA. In this way, the problem of how to use RA resources in different time domains, frequency domains, and / or code domains to transmit a plurality of messages MsgA is solved to some extent.

Description

Random access method and apparatus TECHNICAL FIELD

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

[0002] Contention resolution diversity slotted ALOHA (CRDSA) technology is a technology for reducing the uplink collision probability of a contention channel and improving the uplink capacity. A terminal generates multiple uplink transmissions by copying an uplink transmission, and then transmits the multiple uplink transmissions. The network successfully receives any one of the multiple uplink transmissions, and then performs interference cancellation on other reception positions of the received uplink transmission, so as to parse other uplink transmissions which collide with the received uplink transmission at the other reception positions.

[0003] SUMMARY

[0004] The present disclosure provides a random access method and apparatus.

[0005] The first aspect of the present disclosure provides a random access method, which is performed by a terminal, and the method comprises the following steps.

[0006] Determining multiple random access (RA) resources.

[0007] Transmitting multiple uplink transmissions respectively by using the multiple RA resources, wherein the multiple uplink transmissions carry the same message MsgA.

[0008] The second aspect of the present disclosure provides a random access method, which is performed by a network device, and the method comprises the following steps.

[0009] Receiving at least one uplink transmission of multiple uplink transmissions transmitted by a terminal, wherein the multiple uplink transmissions carry the same message MsgA.

[0010] The third aspect of the present disclosure provides a terminal, which comprises the following modules.

[0011] A processing module is configured to determine multiple random access (RA) resources.

[0012] A transceiver module is configured to transmit multiple uplink transmissions respectively by using the multiple RA resources, wherein the multiple uplink transmissions carry the same message MsgA.

[0013] The fourth aspect of the present disclosure provides a network device, which comprises the following modules.

[0014] The transceiver module is configured to receive at least one of a plurality of uplink transmissions sent by the terminal, wherein the plurality of uplink transmissions carry the same message MsgA.

[0015] The scheme provided by the embodiments of the present disclosure is that the terminal first determines a plurality of RA resources that are different in frequency domain, time domain and / or code domain, and then uses the plurality of RA resources to respectively send a plurality of uplink transmissions carrying the same message MsgA to the network device. In this way, the plurality of MsgA are respectively sent using the plurality of different RA resources, and the reliability and success rate of RA are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the background art, the drawings needed to be used in the embodiments of the present disclosure or the background art will be described below.

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

[0018] FIG. 1B is a timing diagram of uplink transmissions received by a network device;

[0019] FIG. 2 is an interaction diagram of a random access method provided by an embodiment of the present disclosure;

[0020] FIGS. 3A-3D are flow diagrams of a random access method provided by an embodiment of the present disclosure;

[0021] FIGS. 4A-4D are flow diagrams of a random access method provided by an embodiment of the present disclosure;

[0022] FIG. 5 is a flow diagram of a random access method provided by an embodiment of the present disclosure;

[0023] FIG. 6A is a structural diagram of a terminal provided by an embodiment of the present disclosure;

[0024] FIG. 6B is a structural diagram of a network device provided by an embodiment of the present disclosure;

[0025] FIG. 7A is a structural diagram of a communication device provided by an embodiment of the present disclosure;

[0026] FIG. 7B is a structural diagram of a chip provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] The embodiments of the present disclosure provide a random access method and device.

[0028] In a first aspect, the embodiments of the present disclosure provide a random access method, which includes: determining a plurality of random access (RA) resources; and using the plurality of RA resources to respectively send a plurality of uplink transmissions, wherein the plurality of uplink transmissions carry the same message MsgA.

[0029] In the above embodiment, the terminal first randomly determines a plurality of RA resources, and then uses the plurality of RA resources to respectively send a plurality of uplink transmissions carrying the same MsgA to the network device. Thus, a plurality of MsgA are sent using a plurality of randomly determined RA resources, and the reliability of RA is improved.

[0030] In combination with some embodiments of the first aspect, in some embodiments, the plurality of uplink transmissions correspond to the same physical uplink shared channel (PUSCH) payload.

[0031] In the above embodiment, the terminal can send a plurality of uplink transmissions carrying the same PUSCH payload, thereby improving the probability of RA success at the lowest transmission cost.

[0032] In combination with some embodiments of the first aspect, in some embodiments, the same PUSCH payload includes one or more of the following: the same media access control (MAC) protocol data unit (PDU) in the PUSCH payload; the same MAC service data unit (SDU) in the PUSCH payload.

[0033] In the above embodiment, different granularities of payloads can be carried in the plurality of uplink transmissions, thereby improving the flexibility of the plurality of uplink transmissions.

[0034] In combination with some embodiments of the first aspect, in some embodiments, the plurality of RA resources satisfy one or more of the following: correspond to the same preamble; correspond to the same downlink beam; the corresponding preambles belong to the same preamble group; the corresponding preambles belong to different preamble groups; the random access occasions (ROs) occupied by the corresponding preambles belong to different time domain positions; the frequency domain resources occupied by the corresponding preambles are all frequency division multiplexing (FDM) RO resources; the frequency domain resources occupied by the corresponding preambles belong to the same frequency domain position RO resource; any one of the time domain resources, frequency domain resources, and code domain resources occupied by the corresponding preambles is different; any one of the time domain resources, frequency domain resources, and code domain resources occupied by the corresponding physical uplink shared channel (PUSCH) is different; the time-frequency domain resources occupied by the PUSCH corresponding to each RA resource correspond one-to-one to the time-frequency domain resources occupied by the preamble corresponding to the RA resource; belong to the same bandwidth part (BWP); belong to different BWPs of the same uplink carrier; belong to different carriers.

[0035] In the above embodiment, the terminal can use the RA resources satisfying a plurality of conditions to send a plurality of RA first messages, thereby improving the flexibility and reliability of the transmission of the plurality of RA first messages and improving the probability of RA success.

[0036] In some embodiments of the first aspect, in some embodiments, the determining the plurality of random access (RA) resources comprises: determining, in the first time period, RA resources of a plurality of random access occasions (ROs) corresponding to different time domain positions.

[0037] In the above embodiments, the terminal can select, in the first time period, RA resources of a plurality of ROs corresponding to different time domain positions, so as to ensure that the TA offset between the plurality of uplink transmissions is within the network device capability range, thereby providing a guarantee for accurate interference cancellation of the network device. Moreover, the plurality of ROs are located in different time domain positions, which reduces the requirement on the instantaneous transmission power of the terminal on the basis of ensuring that the plurality of uplink transmissions are reliably transmitted.

[0038] In some embodiments of the first aspect, in some embodiments, the method further comprises: determining the length of the first time period according to a protocol agreement; or determining the length of the first time period according to the received first indication information.

[0039] In the above embodiments, the terminal can determine the length of the first time period according to a protocol agreement or an indication of the network device, thereby ensuring consistency of the understanding of the length of the first time period by the terminal and the network device.

[0040] In some embodiments of the first aspect, in some embodiments, the first uplink transmission carries second indication information, wherein the second indication information is used to indicate the plurality of RA resources or RA resources occupied by other uplink transmissions except the first uplink transmission, and the first uplink transmission is one of the plurality of uplink transmissions.

[0041] In the above embodiments, the terminal indicates the RA resources occupied by the uplink transmission in the uplink transmission, so that the network device can determine the RA resources occupied by other associated uplink transmissions upon receiving any uplink transmission.

[0042] In some embodiments of the first aspect, in some embodiments, the second indication information comprises one or more of the following: a first radio network temporary identifier (RNTI) corresponding to the RA resource; a time domain position index corresponding to the RA resource; a frequency domain position index corresponding to the RA resource; and a code domain resource index corresponding to the RA resource.

[0043] In the above embodiments, the terminal carries the time domain position index, the frequency domain position index, and / or the code domain resource index corresponding to the RA resource in the uplink transmission, so as to achieve synchronization of the RA resources occupied by the uplink transmission to the network device with as little transmission data as possible.

[0044] In some embodiments of the first aspect, in some embodiments, the second RNTI is determined according to a RA resource occupied by a first transmitted uplink transmission of the multiple uplink transmissions; and the response message is received based on the second RNTI.

[0045] In the above embodiments, the terminal only needs to monitor the response message addressed by the determined RNTI, thereby not only improving the reliability of the terminal obtaining the response message for the uplink packet, but also reducing the number of channels that the terminal needs to monitor and saving the power consumption of the terminal.

[0046] In some embodiments of the first aspect, in some embodiments, the method further comprises: sending first information to the network device, wherein the first information is used to indicate whether the terminal supports transmitting multiple uplink transmissions.

[0047] In the above embodiments, the terminal can indicate its capability information to the network device, thereby ensuring the consistency of the understanding of the terminal's capability between the terminal and the network side.

[0048] In some embodiments of the first aspect, in some embodiments, the method further comprises: receiving the multiple RA resources configured by the network device.

[0049] In the above embodiments, the terminal can receive the RA resources configured by the network device for multiple uplink transmissions, thereby providing conditions for improving the success rate of using different RA to send multiple RA first messages.

[0050] In some embodiments of the first aspect, in some embodiments, before the multiple uplink transmissions are respectively transmitted using the multiple RA resources, the method further comprises: performing time advance (TA) compensation on a first transmitted uplink transmission.

[0051] In the above embodiments, the terminal only performs time advance compensation on the first transmitted uplink transmission, thereby aligning the time between the terminal and the network device side as much as possible while ensuring the phase continuity between the multiple uplink transmissions.

[0052] In some embodiments of the first aspect, in some embodiments, the method further comprises: performing phase compensation on the uplink transmissions other than the first transmitted uplink transmission.

[0053] In the above embodiments, the terminal performs phase compensation on the uplink transmissions other than the first transmitted uplink transmission, thereby ensuring the consistency of the phase of the multiple uplink transmissions when the terminal is in a moving state or a relative moving state.

[0054] In some embodiments of the first aspect, in some embodiments, the transmitting the multiple uplink transmissions respectively using the multiple RA resources comprises: transmitting the multiple uplink transmissions respectively using the multiple RA resources with a first power.

[0055] In some embodiments of the first aspect, in some embodiments, after the transmitting the multiple uplink transmissions respectively with the first power, the method further comprises: retransmitting the multiple uplink transmissions with a second power in a case that no response message is received, wherein the second power is greater than the first power.

[0056] In the above embodiments, when the multiple RA first messages are not reliably received, the terminal retransmits the multiple RA first messages by increasing the transmission power, thereby further improving the probability of successful reception of the multiple RA first messages and improving the reliability of the RA.

[0057] In the second aspect, the embodiments of the present disclosure provide a random access method, the method is performed by a network device, and the method comprises: receiving at least one uplink transmission in multiple uplink transmissions transmitted by a terminal, wherein the multiple uplink transmissions carry a same message MsgA.

[0058] In some embodiments of the second aspect, in some embodiments, the PUSCH payloads carried in the multiple uplink transmissions are the same.

[0059] In some embodiments of the second aspect, in some embodiments, the PUSCH payloads being the same comprises one or more of the following: media access control (MAC) protocol data units (PDUs) in the PUSCH payloads being the same; MAC service data units (SDUs) in the PUSCH payloads being the same.

[0060] In some embodiments of the second aspect, in some embodiments, the method further comprises:

[0061] sending first indication information to the terminal, wherein the first indication information is used to indicate the length of the first time period.

[0062] In some embodiments of the second aspect, in some embodiments, the second indication information is carried in the at least one uplink transmission, wherein the second indication information is used to indicate the multiple RA resources or RA resources occupied by other uplink transmissions except the at least one uplink transmission.

[0063] In some embodiments of the second aspect, in some embodiments, the second indication information comprises one or more of the following: a first radio network temporary identifier (RNTI) corresponding to the RA resource; a time domain location index corresponding to the RA resource; a frequency domain location index corresponding to the RA resource; and a code domain resource index corresponding to the RA resource.

[0064] In some embodiments of the second aspect, in some embodiments, the method further comprises:

[0065] determining, according to the second indication information, a RA resource occupied by a first transmitted uplink transmission among the multiple uplink transmissions;

[0066] determining a second radio network temporary identifier (RNTI) according to the RA resource occupied by the first transmitted uplink transmission;

[0067] sending, to the terminal, a response message based on the second RNTI.

[0068] In some embodiments of the second aspect, in some embodiments, the method further comprises:

[0069] receiving first information sent by the terminal, wherein the first information is used to indicate whether the terminal supports transmitting multiple uplink transmissions.

[0070] In some embodiments of the second aspect, in some embodiments, the method further comprises:

[0071] configuring, for the terminal, a RA resource used for the multiple uplink transmissions, when the terminal supports transmitting multiple uplink transmissions.

[0072] In a third aspect, the embodiments of the present disclosure provide a random access method, the method is performed by a communication system, and the method comprises the following steps:

[0073] determining, by a terminal, multiple random access (RA) resources;

[0074] transmitting, by the terminal, multiple uplink transmissions to a network device respectively using the multiple RA resources, wherein the multiple uplink transmissions carry a same message MsgA.

[0075] In a fourth aspect, the embodiments of the present disclosure provide a terminal, the terminal comprises a transceiver module and a processing module; wherein the transceiver module is configured to perform the transceiving operations in the first aspect and the embodiments of the first aspect; and the processing module is configured to perform the determining operations in the first aspect and the embodiments of the first aspect.

[0076] In a fifth aspect, the embodiments of the present disclosure provide a network device, comprising a transceiver module and a processing module; wherein the transceiver module is configured to perform the transceiving operations in the embodiments of the second aspect and the optional implementation manners of the second aspect; and the processing module is configured to perform the determining operations in the embodiments of the second aspect and the optional implementation manners of the second aspect.

[0077] In a sixth aspect, the embodiments of the present disclosure provide a communication apparatus, comprising one or more processors; wherein the communication apparatus is configured to perform the method according to the first aspect and the optional implementation manners of the first aspect.

[0078] In a seventh aspect, the embodiments of the present disclosure provide a communication apparatus, comprising one or more processors; wherein the communication apparatus is configured to perform the method according to the second aspect and the optional implementation manners of the second aspect.

[0079] In an eighth aspect, the embodiments of the present disclosure provide a communication system, comprising a terminal and a network device; wherein the terminal is configured to perform the method according to the first aspect and the optional implementation manners of the first aspect, and the network device is configured to perform the method according to the second aspect and the optional implementation manners of the second aspect.

[0080] In a ninth aspect, the embodiments of the present disclosure provide a storage medium, which stores instructions, and when the instructions are executed on a communication device, the communication device performs the method according to the first aspect and the optional implementation manners of the first aspect, the second aspect and the optional implementation manners of the second aspect.

[0081] In a tenth aspect, the embodiments of the present disclosure provide a program product, which is executed by a communication device, and causes the communication device to perform the method according to the first aspect and the optional implementation manners of the first aspect, the second aspect and the optional implementation manners of the second aspect.

[0082] In an eleventh aspect, the embodiments of the present disclosure provide a computer program, which, when executed on a computer, causes the computer to perform the method according to the first aspect and the optional implementation manners of the first aspect, the second aspect and the optional implementation manners of the second aspect.

[0083] In a twelfth aspect, the embodiments of the present disclosure provide a chip or a chip system. The chip or the chip system comprises a processing circuit configured to perform the method according to the first aspect and the optional implementation manners of the first aspect, the second aspect and the optional implementation manners of the second aspect.

[0084] It can be understood that the terminal, network device, access network device, core network device, communication system, storage medium, program product, computer program, chip or chip system are used to execute the method proposed in the embodiments of the present disclosure. Therefore, the beneficial effects achieved thereby can refer to the beneficial effects in the corresponding method, which will not be described here.

[0085] The embodiments of the present disclosure propose a random access method and device. In some embodiments, the terms of the random access method, information processing method, and communication method can be replaced with each other, the terms of the message transmission device, information processing device, and communication device can be replaced with each other, and the terms of the message transmission system, information processing system, and communication system can be replaced with each other.

[0086] 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 manners 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 manners of other embodiments.

[0087] In the embodiments of the present disclosure, the terms and / or descriptions of 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.

[0088] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments, and not as a limitation on the present disclosure.

[0089] In the embodiments of the present disclosure, unless otherwise specified, the elements expressed in singular form, such as "one", "a", "the", "the", "the", "the", "this", etc., can represent "one and only one", or "one or more", "at least one", etc. For example, in the case of using articles such as "a", "an", "the" in English, the noun after the article can be understood as singular expression, or can be understood as plural expression.

[0090] In the embodiments of the present disclosure, "a plurality of" means two or more.

[0091] In some embodiments, the terms “at least one of,” “one or more of,” “a plurality of,” “multiple,” and the like can be used interchangeably.

[0092] In some embodiments, the recitations such as “at least one of A, B,” “A and / or B,” “in one case A, in another case B,” “in response to a case A, in response to a case B,” and the like can include the following technical solutions according to the case: in some embodiments, A (A is executed regardless of B); in some embodiments, B (B is executed regardless of A); in some embodiments, A and B are selectively executed (A and B are selectively executed); in some embodiments, A and B (A and B are both executed). When there are more branches such as A, B, C, and the like, the above is similar.

[0093] In some embodiments, the recitations such as “A or B” and the like can include the following technical solutions according to the case: in some embodiments, A (A is executed regardless of B); in some embodiments, B (B is executed regardless of A); in some embodiments, A and B are selectively executed (A and B are selectively executed). When there are more branches such as A, B, C, and the like, the above is similar.

[0094] In the embodiments of the present disclosure, the prefix words “first,” “second,” and the like are merely used to distinguish different description objects, and do not constitute a limitation on the position, order, priority, quantity, or content of the description objects. The description of the description objects should refer to the description in the context of the claims or embodiments, and should not constitute an unnecessary limitation because of the use of the prefix words. For example, the description objects are “fields,” and the ordinal words before “fields” 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 objects are “levels,” and the ordinal words before “levels” in “first level” and “second level” do not limit the priority between “levels.” For another example, the quantity of the description objects is not limited by the ordinal words, and can be one or more. For example, “first device,” where the quantity of “devices” can be one or more. In addition, the objects modified by different prefix words can be the same or different, for example, the description objects are “devices,” 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 objects are “information,” and “first information” and “second information” can be the same information or different information, and the content thereof can be the same or different.

[0095] In some embodiments, "comprising", "including", "to indicate", "carrying", can be interpreted as directly carrying A, or indirectly indicating A.

[0096] In some embodiments, the terms "in response to", "in response to determining", "in the case of", "when", "when", "if", "if" and the like can be replaced with each other.

[0097] In some embodiments, the terms "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 less than", "above" and the like can be replaced with each other, and the terms "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.

[0098] In some embodiments, the apparatus and device can be interpreted as physical or virtual, and its name is not limited to the name 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" and the like.

[0099] In some embodiments, "network" can be interpreted as an apparatus included in the network, such as an access network device, a core network device, and the like.

[0100] In some embodiments, an “access network device (AN device)” can also be referred to as a “radio access network device (RAN device),” a “base station (BS),” a “radio base station,” a “fixed station,” and in some embodiments can also be understood as a “node,” an “access point,” a “transmission point (TP),” a “reception point (RP),” a “transmission / reception point (TRP),” a “panel,” an “antenna panel,” an “antenna array,” a “cell,” a “macro cell,” a “small cell,” a “femto cell,” a “pico cell,” a “sector,” a “cell group,” a “serving cell,” a “carrier,” a “component carrier,” a “bandwidth part (BWP),” and the like.

[0101] In some embodiments, a "terminal" or "terminal device" can be referred to as a "user equipment (UE)", "user terminal", Narrow Band-Internet of Things (NB-IoT) device, "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, etc.

[0102] In some embodiments, an access network device, core network device, or network device can be replaced with a terminal. For example, for a structure in which communication between an access network device, core network device, or network device and a terminal is replaced with communication between a plurality of terminals (e.g., device-to-device (D2D), vehicle-to-everything (V2X), etc.), embodiments of the present disclosure can also be applied. In this case, it can also be configured as a structure in which a terminal has all or part of the functions that an access network device has. Furthermore,

[0103] The terms "uplink", "downlink", etc. can also be replaced with terms corresponding to inter-terminal communication (e.g., "side"). For example, an uplink channel, a downlink channel, etc. can be replaced with a side channel, an uplink, a downlink, etc. can be replaced with a sidelink.

[0104] In some embodiments, the terminal can 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 can also be configured to have all or part of the functions of the terminal.

[0105] In some embodiments, the data, information, and the like can be acquired in compliance with the laws and regulations of the country where the terminal is located.

[0106] In some embodiments, the data, information, and the like can be acquired after obtaining the consent of the user.

[0107] FIG. 1A is a schematic diagram of an architecture of a communication system according to an embodiment of the present disclosure.

[0108] As shown in FIG. 1A, the communication system 100 includes a terminal 101 and a network device 102.

[0109] In some embodiments, the terminal 101 includes at least one of a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a 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, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, a wireless terminal device in smart home, and the like, but is not limited thereto.

[0110] In some embodiments, the network device 102 can include at least one of an access network device and a core network device.

[0111] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network, and can include at least one of 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 base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, an access node in a Wi-Fi system, but is not limited thereto.

[0112] In some embodiments, the technical solutions of the present disclosure can be applied to an Open RAN architecture, at which 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 realized through software or programs.

[0113] In some embodiments, the access network device 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, with part of the protocol layer functions being controlled by the CU, and the remaining part or all of the protocol layer functions being distributed in the DU and controlled by the CU, but is not limited thereto.

[0114] In some embodiments, the core network device 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, for example, at least one of an evolved packet core (EPC), a 5G core network (5GCN), and a next generation core (NGC).

[0115] 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 embodiments of the present disclosure, and does not constitute a limitation on the technical solutions proposed by the embodiments of the present disclosure. Those skilled in the art can know that, with the evolution of system architecture and the appearance of new business scenarios, the technical solutions proposed by the embodiments of the present disclosure are also applicable to similar technical problems.

[0116] The following embodiments of the present disclosure can be applied to the communication system 100 shown in FIG. 1A or part of the subjects, but are not limited thereto. The subjects shown in FIG. 1A are exemplary, and the communication system can include all or part of the subjects in FIG. 1A, or other subjects other than FIG. 1A. The number and form of each subject is arbitrary, each subject can be physical or virtual, the connection relationship between each subject is exemplary, each subject can not be connected or can be connected, the connection can be in any way, can be direct connection or indirect connection, can be wired connection or wireless connection.

[0117] 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).

[0118] In the field of communication technology, contention resolution diversity slotted ALOHA (CRDSA) technology is a technology for reducing the uplink collision probability of a contention channel and improving the uplink capacity. A terminal generates multiple uplink transmissions by duplicating an uplink transmission, and then transmits the multiple uplink transmissions at different times. The network receives any one of the uplink transmissions and succeeds in receiving, thereby reducing the collision failure probability.

[0119] In some embodiments, because the terminal transmits at least two uplink transmissions that are the same, the probability of collision increases to some extent, and therefore interference cancellation technology needs to be used. The process will be described below in conjunction with FIG. 1B. FIG. 1B is a timing diagram of uplink transmissions received by the network device. For example, a terminal transmits two uplink transmissions PK3, one of which, PK3, does not collide and can be correctly parsed by the network device. The other uplink transmission PK3 collides with an uplink transmission PK2 transmitted by another terminal. Then the network device can use the correctly parsed PK3 to perform interference cancellation on the position of the other PK3, so that the network device can correctly parse the uplink transmission PK2 transmitted by the other terminal. Then the network device can use the parsed PK2 to perform interference cancellation on the position of the other PK2, parse PK1, and so on, until all uplink transmissions that can be parsed are parsed, such as PK4, PK5, and PK6 in the figure.

[0120] For random access, the random access resource includes a physical random access channel (PRACH) resource and a physical uplink shared channel (PUSCH) resource. The PRACH resource includes a preamble Preamble resource and a time-frequency domain resource. For the PUSCH resource, it includes a time-frequency domain resource and a demodulation reference signal (DMRS) code domain resource. At the same time, the time-frequency domain resource includes resources on different synchronization signal blocks (SSBs), resources within one bandwidth part (BWP), resources of different BWPs, and resources of different carriers. When multiple uplink transmissions carrying the first message of RA are transmitted, it is uncertain which resource each uplink transmission uses to transmit. In addition, the power used to transmit the multiple uplink transmissions and the radio network temporary identifier (RNTI) used by the terminal to receive the response are also unclear.

[0121] The random access method and apparatus provided by the present disclosure are described in detail below with reference to the accompanying drawings.

[0122] FIG. 2 is an interaction diagram of a random access method according to an embodiment of the present disclosure. As shown in FIG. 2, the embodiment of the present disclosure relates to a random access method, and the method comprises the following steps.

[0123] In step S2101, the terminal 101 sends first information to the network device 102.

[0124] In some embodiments, the first information is used to indicate whether the terminal supports sending multiple uplink transmissions.

[0125] In some embodiments, the terminal can be a Non Terrestrial Network (NTN) terminal or a Terrestrial Network (TN) terminal.

[0126] In some embodiments, the first information can be used to indicate whether the terminal 101 supports sending multiple MsgA using randomly selected random access (RA) resources.

[0127] In some embodiments, the random access is a 2-step RA.

[0128] In some embodiments, the PUSCH payloads corresponding to the multiple uplink transmissions are the same.

[0129] In some embodiments, the PUSCH payloads being the same can mean that the media access control (MAC) protocol data units (PDUs) in the PUSCH payloads are the same.

[0130] In some embodiments, the PUSCH payloads being the same can mean that the MAC service data units (SDUs) in the PUSCH payloads are the same.

[0131] In some embodiments, the network device 102 can receive the first information sent by the terminal 101.

[0132] In step S2102, the network device 102 configures multiple RA resources for multiple uplink transmissions for the terminal 101.

[0133] In some embodiments, the network device 102 can configure multiple RA resources for the terminal 101 in the case that the terminal supports multiple uplink transmissions. Thus, the network device 102 avoids the waste of resources caused by configuring the terminal 101 with corresponding RA resources when the terminal 101 does not support sending multiple uplink transmissions.

[0134] In some embodiments, the multiple RA resources include a combination of one or more of the following: time domain resources, frequency domain resources, and code domain resources.

[0135] In some embodiments, the code domain resources are, for example, preambles (Preambles) and DMRSs.

[0136] In some embodiments, the multiple RA resources configured by the network device 102 can include multiple RA resources that are different in the time domain, the frequency domain, and / or the code domain.

[0137] In some embodiments, the number of RA resources configured by the network device can be the same as the number of multiple uplink transmissions to be sent by the terminal. Thus, the terminal directly uses the multiple RA resources configured by the network device to send the multiple uplink transmissions respectively.

[0138] In some embodiments, the number of RA resources configured by the network device is greater than the number of multiple uplink transmissions to be sent by the terminal. Then, the terminal can select the same number of RA resources from the multiple RA resources configured by the network device as the number of multiple uplink transmissions to be sent, and then use the selected multiple RA resources to send the multiple uplink transmissions respectively.

[0139] In some embodiments, the multiple RA resources configured by the network device 102 can be common RA resources. Alternatively, they can be RA resources specially used for sending multiple uplink transmissions.

[0140] In some embodiments, the terms "uplink transmission", "uplink sending", "uplink duplicate packet", "uplink data packet", "uplink packet", and "uplink information" can all refer to data and / or control signaling sent in the uplink, and thus they can be replaced with each other in some cases.

[0141] In step S2103, the terminal 101 determines multiple RA resources corresponding to multiple ROs in different time domain positions in the first time period.

[0142] In some embodiments, each RA resource can correspond to multiple ROs. When selecting multiple RA resources, the terminal 101 can select multiple RA resources corresponding to multiple ROs in different time domain positions based on the time domain positions of the ROs corresponding to each RA resource. Thus, when the terminal uses multiple RA resources to send multiple uplink transmissions respectively, it can send multiple uplink transmissions in different ROs respectively.

[0143] In some embodiments, the terminal 101 can select, from the RA resources configured by the network device, a plurality of RA resources corresponding to a plurality of ROs in different time domain positions based on the number of uplink transmissions to be sent, and the plurality of ROs occupy a time length within the first time period.

[0144] In the embodiments of the present disclosure, in the multiple uplink transmission scenario, in order to perform interference cancellation, the network device needs to accurately infer the relative phase offset between multiple uplink transmissions, which requires the terminal not to perform timing advance (TA) adjustment when sending multiple uplink transmissions. At this time, considering the movement of the satellite, the TA deviation will gradually accumulate. Therefore, the terminal can select, within the first time period, a plurality of RA resources corresponding to a plurality of ROs in different time domain positions, so as to ensure that the accumulated TA deviation between the multiple uplink transmissions is within the network device capability range, thereby providing a guarantee for the network device to perform accurate interference cancellation. Moreover, the plurality of ROs are located in different time domain positions, which reduces the requirement on the instantaneous transmission power of the terminal on the basis of ensuring that the multiple uplink transmissions are reliably sent.

[0145] In some embodiments, the terminal can determine the length of the first time period according to the protocol.

[0146] In some embodiments, the terminal can determine the length of the first time period according to the received first indication information sent by the network device.

[0147] In the embodiments of the present disclosure, the terminal determines the length of the first time period based on the protocol or the indication of the network device, thereby ensuring that the terminal and the network device have consistent understanding of the length of the first time period, and thereby providing a condition for the network device to perform accurate channel estimation and interference cancellation.

[0148] In some embodiments, the terminal can first determine a plurality of RA resources for sending a plurality of uplink transmissions from a plurality of RA resources configured by the network device, and then select, from the selected plurality of RA resources, a plurality of ROs located within the first time period and corresponding to a plurality of different time domain positions.

[0149] In some embodiments, the terminal can randomly select a plurality of RA resources from a plurality of RA resources configured by the network device for sending a plurality of uplink transmissions.

[0150] In some embodiments, the multiple RA resources selected by the terminal 101 can satisfy one or more of the following: correspond to the same preamble; correspond to the same downlink beam; the corresponding preambles belong to the same preamble group; the corresponding preambles belong to different preamble groups; the corresponding preambles occupy random access occasions (ROs) that belong to different time domain locations; the corresponding preambles occupy frequency domain resources that are all frequency division multiplexing (FDM) RO resources; the corresponding preambles occupy frequency domain resources that belong to the same frequency domain location; any one of the time domain resources, frequency domain resources, and code domain resources occupied by the corresponding preambles is different; any one of the time domain resources, frequency domain resources, and code domain resources occupied by the corresponding physical uplink shared channels (PUSCHs) is different; the time-frequency domain resources occupied by the PUSCH corresponding to each RA resource correspond one-to-one to the time-frequency domain resources occupied by the preamble corresponding to the RA resource; belong to the same bandwidth part (BWP); belong to different BWPs of the same uplink carrier; belong to different carriers.

[0151] That is, at least one of the preambles used, the frequency domain and / or time domain resources occupied by the preambles, and the frequency domain and / or time domain resources occupied by the PUSCHs can be different when different uplink transmissions are sent.

[0152] That is, the terminal 101 can send multiple MsgAs by using the same preamble, by using preambles that belong to the same preamble group, by using preambles that belong to different preamble groups, or by using preambles that are different in at least one of the frequency domain and / or time domain resources occupied by the preambles and the frequency domain and / or time domain resources occupied by the PUSCHs. By using multiple RA resources to send the same MsgA multiple times, the probability of successful sending of the MsgA is improved, and the success rate of random access is improved, thereby improving the reliability of communication.

[0153] In some embodiments, the number of uplink transmissions to be sent by the terminal 101 can be agreed upon in a protocol or indicated by the network device 102. This ensures consistency in the understanding of the number of uplink transmissions to be sent by the terminal and the network device, and provides a condition for improving the accuracy of channel estimation and interference cancellation by the network device.

[0154] In some embodiments, at least one of the time domain, frequency domain, and code domain resources among the multiple RA resources selected by the terminal 101 can be not completely continuous or different.

[0155] For example, the multiple RA resources can be multiple RA resources which are discontinuous in time domain. For example, the terminal 101 selects 3 RA resources, at least two of which are discontinuous in time domain. Or, the terminal 101 selects 3 RA resources corresponding to different DMRS, and the like, which are not limited in the present disclosure.

[0156] In step S2104, the terminal 101 performs timing advance (TA) compensation on the first transmitted uplink transmission.

[0157] In some embodiments, the terms "first transmitted", "first", "first transmitted", "the time domain position of the used RA resource is the earliest" and the like can be replaced with each other.

[0158] In the present disclosure, considering that the transmission times of different uplink transmissions are different, in order to ensure that the network device 102 can infer the relative phase offset of different uplink transmissions, the terminal 101 is required not to perform timing advance adjustment when transmitting different uplink transmissions, otherwise the phase continuity will be destroyed. In order to ensure that the time on the terminal 101 side and the network device 102 side are aligned as much as possible, in the present disclosure, the terminal 101 can only perform timing advance (TA) compensation on the first transmitted uplink transmission, so as to realize the alignment of the time on the terminal side and the network device side as much as possible while ensuring the phase continuity between multiple uplink transmissions.

[0159] In some embodiments, the terms "timing advance", "timing advance amount", "timing advance", "timing advance amount" and the like can be replaced with each other.

[0160] In step S2105, phase compensation is performed on the uplink transmission other than the first transmitted uplink transmission.

[0161] In some embodiments, the terminal 101 can be in a moving state or a relative moving state during the transmission of multiple uplink transmissions. In order to avoid the inconsistency of the "phase" of multiple uplink transmissions due to the movement of the terminal 101, after the first uplink transmission is transmitted, if it is determined that the terminal 101 has a movement behavior, then before transmitting other uplink transmissions, the terminal 101 can perform phase compensation on the other uplink transmissions based on the first phase change caused by the movement of the terminal 101.

[0162] In some embodiments, when the number of multiple uplink transmissions is greater than 2, before transmitting each uplink transmission other than the first transmitted uplink transmission, the terminal 101 needs to determine the first phase change caused by the movement of the terminal 101 in the period from the transmission of the last uplink transmission to the current time, and then perform phase compensation on the to-be-transmitted uplink transmission based on the current first phase change.

[0163] For example, the terminal 101 determines that it needs to send 3 uplink transmissions carrying the same content to the network device 102. Before sending the first uplink transmission, the terminal 101 first performs TA compensation on the sending time of the first uplink transmission. Before sending the second uplink transmission, if it is determined that the terminal 101 has moved, it is necessary to determine the first phase change caused by the movement of the terminal 101 from the time of sending the first uplink transmission to the current time, and perform phase compensation on the second uplink transmission based on the phase change. Then, when sending the third uplink transmission, it is also necessary to determine the first phase change caused by the movement of the terminal 101 from the time of sending the second uplink transmission to the current time, and perform phase compensation on the third uplink transmission based on the phase change. Thus, when inferring the relative displacement offset of the phase packets of the 3 uplink transmissions, the network device 102 is not affected by the movement of the terminal 101, which provides conditions for the network device 102 to perform accurate interference cancellation.

[0164] In some embodiments, the terminal 101 performs phase compensation on other uplink transmissions based on the second phase change caused by the movement of the satellite.

[0165] In some embodiments, if the terminal 101 is an NTN terminal, since the satellite is always in movement or relative movement, in order to keep the "phase" consistent among multiple uplink transmissions, the terminal 101 can perform phase compensation on each uplink transmission other than the first uplink transmission before sending it to the network device 102, based on the second phase change caused by the movement of the satellite.

[0166] In some embodiments, if the terminal 101 does not perform phase compensation on other uplink transmissions other than the first uplink transmission based on the second phase change caused by the movement of the satellite, the network device 102 can perform phase compensation on other uplink transmissions other than the first uplink transmission based on the second phase change caused by the movement of the satellite.

[0167] In some embodiments, the terminal 101 and the network device 102 can determine which of the two performs the above-mentioned operation of performing phase compensation on other uplink transmissions other than the first uplink transmission based on the second phase change caused by the movement of the satellite based on protocol agreement.

[0168] In some embodiments, the network device 102 can also instruct the terminal 101 whether it needs to perform the above-mentioned operation of performing phase compensation on other uplink transmissions other than the first uplink transmission based on the second phase change caused by the movement of the satellite.

[0169] In some embodiments, the terminal 101 does not perform the above-mentioned operation of compensating the phase of the uplink transmission other than the first uplink transmission based on the second phase change caused by the movement of the satellite if the terminal 101 does not receive the indication from the network device 102.

[0170] In step S2106, the terminal 101 transmits the multiple uplink transmissions to the network device 102 respectively using the multiple RA resources at the first power.

[0171] In some embodiments, the first transmitted uplink transmission of the multiple uplink transmissions includes the preamble and the payload of the PUSCH, and the uplink transmission other than the first transmitted uplink transmission includes only the payload of the PUSCH. Thus, the RA resources occupied by the multiple uplink transmissions are reduced as much as possible on the basis of ensuring that the effective information is reliably transmitted.

[0172] In some embodiments, each of the multiple uplink transmissions includes the preamble and the payload of the PUSCH. Thus, the network device can perform accurate channel estimation and interference cancellation based on the preamble in any received uplink transmission.

[0173] In some embodiments, one or several of the multiple uplink transmissions include the preamble and the payload of the PUSCH.

[0174] In some embodiments, the terminal can determine which uplink transmission or uplink transmissions include the preamble and the payload of the PUSCH according to the protocol agreement or the indication of the network device. The consistency of the understanding of the relative position of the uplink transmission including the preamble and the uplink transmission other than the uplink transmission including the preamble by the terminal and the network device is ensured, and the basis for the network device to perform channel estimation and interference cancellation is provided.

[0175] In some embodiments, the size of the first power can be agreed by the protocol or indicated by the network device.

[0176] In some embodiments, the first power can also be determined by the terminal 101 according to the transmission power level of the terminal 101.

[0177] In some embodiments, the second indication information is carried in the first uplink transmission, wherein the second indication information is used to indicate the multiple RA resources or the RA resources occupied by the uplink transmission other than the first uplink transmission, and the first uplink transmission is one of the multiple uplink transmissions.

[0178] In some embodiments, each uplink transmission can include all the RA resources occupied by the uplink transmissions, so that the network device can determine the RA resources occupied by other associated uplink transmissions when receiving any uplink transmission, and then accurately determine the positions of other uplink transmissions to accurately cancel the interference of the transmission at the positions of other uplink transmissions.

[0179] In some embodiments, since the network device 102 can directly determine the RA resources occupied by any uplink transmission after receiving the uplink transmission, the disclosure can also only carry the RA resources occupied by other associated uplink transmissions in each uplink transmission, thereby reducing the amount of transmission resources occupied when synchronizing the RA resources used by multiple uplink transmissions.

[0180] In the embodiments of the disclosure, the terminal carries the RA resources occupied by the uplink transmission in the first uplink transmission, so that the network device can directly determine the RA resources occupied by other associated uplink transmissions after receiving the first uplink transmission, thereby providing conditions for the network device to accurately cancel the interference, and improving the efficiency of the network device to cancel the interference.

[0181] In some embodiments, the second indication information includes one or more of the following: a first radio network temporary identifier (RNTI) corresponding to the RA resource; a time domain position index corresponding to the RA resource; a frequency domain position index corresponding to the RA resource; and a code domain resource index corresponding to the RA resource.

[0182] In the embodiments of the disclosure, the terminal carries the time domain position index, the frequency domain position index, and / or the code domain resource index corresponding to the RA resource in the uplink transmission, thereby realizing synchronization of the RA resources used by the uplink transmission to the network device with as low transmission data amount as possible.

[0183] In step S2107, the terminal 101 and the network device 102 determine a second radio network temporary identifier (RNTI) according to the RA resources occupied by the first transmitted uplink transmission.

[0184] In some embodiments, the terminal 101 can determine the second RNTI according to the time domain position of the RA resources occupied by the first transmitted uplink transmission.

[0185] In some embodiments, the terminal 101 can determine the RNTI according to the number corresponding to the time domain position when scheduling the first uplink transmission. For example, RNTI=a+t id +offset, where a is a positive integer, for example, a can be 1, 2, 3, etc., in particular, a=1; 0 id X, t idX is any natural number, such as 2, 3, 5, 6, 8, 10, 11, … 20, 30, 40, … 50, 60, etc. Offset can be 0, 1, 2, 3, etc. In particular, for an LTE network, Offset can be 60 in order to distinguish from the RNTI value in other scenarios.

[0186] In some embodiments, in addition to the time domain position, the calculation of the RNTI can also consider the frequency domain position, the code domain position, etc. That is, the RNTI can also be determined by adding the frequency domain position ID and the code domain ID to the above formula.

[0187] At step S2108, the terminal 101 receives a response message sent by the network device 102 based on the second RNTI.

[0188] In the embodiments of the present disclosure, the terminal 101 only needs to listen to the physical downlink control channel (PDCCH) addressed by the determined RNTI to receive the response message, thereby not only improving the reliability of the terminal 101 obtaining the response message for the uplink packet, but also reducing the number of channels that the terminal 101 needs to listen to and saving the power consumption of the terminal 101.

[0189] At step S2109, the terminal 101 retransmits the multiple uplink transmissions at a second power.

[0190] In some embodiments, the second power is greater than the first power.

[0191] In some embodiments, the terminal 101 can determine the size of the second power according to a protocol agreement, an indication of the network device, or by itself.

[0192] In some embodiments, the terminal 101 retransmits the multiple uplink transmissions at the second power when the terminal 101 does not receive the response message.

[0193] In some embodiments, the terminal 101 retransmits the multiple uplink transmissions at the second power when the terminal 101 receives the response message but the response message indicates that the uplink transmission decoding fails.

[0194] In some embodiments, the number of uplink transmissions retransmitted by the terminal 101 can be the same as or different from the number of uplink transmissions transmitted at the first power.

[0195] In the embodiments of the present disclosure, when the multiple uplink transmissions carrying MsgA are not reliably received, the terminal increases the transmission power and retransmits the multiple uplink transmissions carrying MsgA, thereby further improving the probability of successfully receiving the multiple uplink transmissions carrying MsgA and improving the success rate and reliability of RA.

[0196] The method related to the embodiments of the present disclosure can include at least one of steps S2101-S2109. For example, step S2101 can be implemented as an independent embodiment, step S2102 can be implemented as an independent embodiment, steps S2103+S2106 can be implemented as an independent embodiment, steps S2102+S2103+S2106 can be implemented as an independent embodiment, steps S2106+S2107+S2108 can be implemented as an independent embodiment, steps S2106+S2107+S2108+S2109 can be implemented as an independent embodiment, and the like, but are not limited thereto.

[0197] In the present embodiment or example, each step can be independently, arbitrarily combined or exchanged in order, optional modes or optional examples can be arbitrarily combined, and can be arbitrarily combined with any step of other embodiments or other examples, without contradiction.

[0198] 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 present embodiment relates to a random access method, the method is performed by the terminal 101, and the method includes:

[0199] Step S3101, sending first information to a network device.

[0200] Step S3102, receiving a plurality of RA resources configured by the network device for a plurality of uplink transmissions.

[0201] Step S3103, determining the RA resources of a plurality of ROs corresponding to different time domain positions in a first time period.

[0202] Step S3104, performing time advance TA compensation on the first transmitted uplink transmission.

[0203] Step S3105, performing phase compensation on the uplink transmission other than the first transmitted uplink transmission.

[0204] Step S3106, using a plurality of RA resources to transmit a plurality of uplink transmissions to the network device respectively at a first power.

[0205] Step S3107, determining a second RNTI according to the RA resource occupied by the first transmitted uplink transmission.

[0206] Step S3108, receiving a response message sent by the network device based on the second RNTI.

[0207] Step S3109, retransmitting the plurality of uplink transmissions at a second power if the response message is not received.

[0208] Steps S3101-S3109 and their optional implementation manners can be referred to the associated parts in steps S2101-S2109 and their optional implementation manners of FIG. 2, which will not be repeated here.

[0209] The method related to the embodiments of the present disclosure can include at least one of steps S3101-S3109. For example, step S3101 can be implemented as an independent embodiment, step S3102 can be implemented as an independent embodiment, steps S3103+S3106 can be implemented as an independent embodiment, steps S3102+S3103+S3106 can be implemented as an independent embodiment, steps S3106+S3107+S3108 can be implemented as an independent embodiment, steps S3106+S3107+S3108+S3109 can be implemented as an independent embodiment, and the like, but are not limited thereto.

[0210] In the present embodiment or example, each step can be independently, arbitrarily combined or exchanged in order, the optional manner or optional example can be arbitrarily combined, and can be arbitrarily combined with any step of other embodiments or other examples.

[0211] 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, the method is performed by the terminal 101, and the method includes:

[0212] Step S3201, receiving a plurality of RA resources configured by a network device for a plurality of uplink transmissions.

[0213] Step S3202, determining the RA resources of a plurality of ROs corresponding to different time domain positions in a first time period.

[0214] Step S3203, using the plurality of RA resources to respectively send a plurality of uplink transmissions to the network device at a first power.

[0215] Step S3104, determining a second RNTI according to the RA resource occupied by the first sent uplink transmission.

[0216] Step S3105, receiving a response message sent by the network device based on the second RNTI.

[0217] Step S3106, re-sending the plurality of uplink transmissions at a second power when the response message is not received.

[0218] Steps S3201-S3206 and their optional implementation manners can be referred to the associated parts in the related steps and their optional implementation manners of FIG. 2, which will not be repeated here.

[0219] The method related to the embodiments of the present disclosure can include at least one of steps S3201-S3206. For example, step S3201 can be implemented as an independent embodiment, steps S3202+S3203 can be implemented as an independent embodiment, steps S3202+S3203+S3204+S3205 can be implemented as an independent embodiment, and the like, but are not limited thereto.

[0220] In the present embodiment or example, each step can be independent, arbitrarily combined or the order exchanged, the optional mode or optional example can be arbitrarily combined, and can be arbitrarily combined with any step of other embodiments or other examples, without contradiction.

[0221] 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 embodiments of the present disclosure relate to a random access method, the method is performed by the terminal 101, and the method includes:

[0222] Step S3301, determining a plurality of RA resources of ROs corresponding to different time domain positions in a first time period.

[0223] Step S3302, using the plurality of RA resources to respectively send a plurality of uplink transmissions to the network device at a first power.

[0224] Step S3303, re-sending the plurality of uplink transmissions at a second power when no response message is received.

[0225] Steps S3201-S3203 and optional implementation modes thereof can refer to the related parts in the steps and optional implementation modes of FIG. 2, and will not be described here.

[0226] The method related to the embodiments of the present disclosure can include at least one of steps S3301-S3303. For example, steps S3301+S3302 can be implemented as an independent embodiment, steps S3202+S3203 can be implemented as an independent embodiment, and the like, but are not limited thereto.

[0227] In the present embodiment or example, each step can be independent, arbitrarily combined or the order exchanged, the optional mode or optional example can be arbitrarily combined, and can be arbitrarily combined with any step of other embodiments or other examples, without contradiction.

[0228] 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, the method is performed by the terminal 101, and the method includes:

[0229] Step S3401, determining a plurality of random access (RA) resources.

[0230] In some embodiments, the frequency domain, time domain and / or code domain of the plurality of RA resources are different.

[0231] At step S3402, the plurality of uplink transmissions are respectively transmitted using the plurality of RA resources.

[0232] The plurality of uplink transmissions carry the same message MsgA.

[0233] In some embodiments, the plurality of uplink transmissions correspond to the same payload of a physical uplink shared channel (PUSCH).

[0234] In some embodiments, the same PUSCH payload includes one or more of the following:

[0235] The same PUSCH payload includes the same medium access control (MAC) protocol data unit (PDU).

[0236] The same PUSCH payload includes the same MAC service data unit (SDU).

[0237] In some embodiments, the plurality of random access (RA) resources satisfy one or more of the following: correspond to the same preamble; correspond to the same downlink beam; correspond to the same preamble group; correspond to different preamble groups; correspond to random access occasions (ROs) in different time domain locations; correspond to RO resources that are frequency division multiplexed (FDM); correspond to RO resources in the same frequency domain location; differ in any one of the time domain resource, frequency domain resource and code domain resource; differ in any one of the time domain resource, frequency domain resource and code domain resource of the corresponding PUSCH; correspond to the time domain resource and frequency domain resource of the preamble one-to-one; belong to the same bandwidth part (BWP); belong to different BWPs of the same uplink carrier; belong to different carriers.

[0238] In some embodiments, the determination of the plurality of RA resources includes determining a plurality of RA resources corresponding to ROs in different time domain locations within a first time period.

[0239] In some embodiments, the method further includes determining the length of the first time period according to a protocol agreement, or determining the length of the first time period according to received first indication information.

[0240] In some embodiments, the second indication information is carried in the first uplink transmission, wherein the second indication information is used to indicate the multiple RA resources, or is used to indicate the RA resources occupied by the uplink transmission other than the first uplink transmission, and the first uplink transmission is one of the multiple uplink transmissions.

[0241] In some embodiments, the second indication information includes one or more of the following: a first radio network temporary identifier (RNTI) corresponding to the RA resource; a time domain location index corresponding to the RA resource; a frequency domain location index corresponding to the RA resource; and a code domain resource index corresponding to the RA resource.

[0242] In some embodiments, the method further includes: determining a second radio network temporary identifier (RNTI) according to the RA resource occupied by the first transmitted uplink transmission of the multiple uplink transmissions; and receiving a response message based on the second RNTI.

[0243] In some embodiments, the method further includes: sending first information to the network device, wherein the first information is used to indicate whether the terminal supports sending multiple uplink transmissions.

[0244] In some embodiments, the method further includes: receiving the multiple RA resources configured by the network device.

[0245] In some embodiments, before the multiple uplink transmissions are respectively transmitted using the multiple RA resources, the method further includes: performing time advance (TA) compensation on the first transmitted uplink transmission.

[0246] In some embodiments, the method further includes: performing phase compensation on the uplink transmission other than the first transmitted uplink transmission.

[0247] In some embodiments, the multiple uplink transmissions are respectively transmitted using the multiple RA resources, including: the multiple uplink transmissions are respectively transmitted using the multiple RA resources at a first power.

[0248] In some embodiments, after the multiple uplink transmissions are respectively transmitted at the first power, the method further includes: in the case that a response message is not received, the multiple uplink transmissions are retransmitted at a second power, wherein the second power is greater than the first power.

[0249] Steps S3401 to S3402 and their optional implementation manners can be referred to the related parts in the steps and their optional implementation manners of FIG. 2, which will not be described here.

[0250] FIG. 4A is a flow diagram of a random access method according to some embodiments of the present disclosure. As shown in FIG. 4A, the present disclosure relates to a random access method, and the method is performed by the network device 102, and the method includes:

[0251] Step S4101, receiving first information sent by a terminal.

[0252] Step S4102, configuring a plurality of RA resources for a plurality of uplink transmissions for the terminal.

[0253] Step S4103, receiving at least one of the plurality of uplink transmissions sent by the terminal at a first power.

[0254] Step S4104, determining a second RNTI according to a RA resource occupied by the first sent uplink transmission.

[0255] Step S4105, sending a response message based on the second RNTI.

[0256] Step S4106, receiving at least one uplink transmission sent by the terminal at a second power.

[0257] Optional implementation manners of steps S4101-S4106 can be referred to the related steps of FIG. 2 and the associated parts in the optional implementation manners thereof, which will not be described herein.

[0258] The method related to the embodiments of the present disclosure can include at least one of steps S4101-S4106. For example, step S4101 can be implemented as an independent embodiment, steps S4102+S4103 can be implemented as an independent embodiment, steps S4103+S4104+S4105 can be implemented as an independent embodiment, steps S4103+S4104+S4105+S4106 can be implemented as an independent embodiment, and the like, but are not limited thereto.

[0259] In the present embodiment or the present example, each step can be independently, arbitrarily combined or exchanged in order, the optional manners or optional examples can be arbitrarily combined, and can be arbitrarily combined with any step of other embodiments or other examples.

[0260] FIG. 4B is a flow diagram of a random access method according to an embodiment of the present disclosure. As shown in FIG. 4B, the embodiments of the present disclosure relate to a random access method, the method is performed by the network device 102, and the method includes:

[0261] Step S4201, configuring a plurality of RA resources for a plurality of uplink transmissions for the terminal.

[0262] Step S4202, receiving at least one of the plurality of uplink transmissions sent by the terminal at a first power.

[0263] Step S4203, determining a second RNTI according to a RA resource occupied by the first sent uplink transmission.

[0264] Step S4204, sending a response message based on the second RNTI.

[0265] Step S4205, receiving at least one uplink transmission sent by the terminal with the second power.

[0266] Optional implementation manners of steps S4201-S4205 can be referred to the associated parts in the related steps of FIG. 2 and their optional implementation manners, which will not be described here.

[0267] The method related to the embodiments of the present disclosure can include at least one of steps S4201-S4205. For example, step S4201 can be implemented as an independent embodiment, steps S4202+S4203+S4204 can be implemented as an independent embodiment, steps S4202+S4203+S4204+S4205 can be implemented as an independent embodiment, and the like, but are not limited thereto.

[0268] In the present embodiment or example, each step can be independently, arbitrarily combined or exchanged in order, the optional manners or optional examples can be arbitrarily combined, and can be arbitrarily combined with any step of other embodiments or other examples.

[0269] FIG. 4C is a flow diagram of a random access method according to an embodiment of the present disclosure. As shown in FIG. 4C, the embodiments of the present disclosure relate to a random access method, the method is performed by the network device 102, and the method includes:

[0270] Step S4301, receiving at least one of a plurality of uplink transmissions sent by the terminal with a first power.

[0271] Step S4302, determining a second RNTI according to a RA resource occupied by the first sent uplink transmission.

[0272] Step S4303, sending a response message based on the second RNTI.

[0273] Optional implementation manners of steps S4301-S4303 can be referred to the associated parts in the related steps of FIG. 2 and their optional implementation manners, which will not be described here.

[0274] The method related to the embodiments of the present disclosure can include at least one of steps S4301-S4303. For example, step S4301 can be implemented as an independent embodiment, steps S4302+S4303 can be implemented as an independent embodiment, and the like, but are not limited thereto.

[0275] In the embodiments or examples, each step can be independent, arbitrarily combined or exchanged in sequence, and the optional mode or example can be arbitrarily combined with any step of other embodiments or other examples, without contradiction.

[0276] FIG. 4D is a flow diagram of a random access method according to an embodiment of the present disclosure. As shown in FIG. 4D, the embodiment of the present disclosure relates to a random access method, the method is performed by the network device 102, and the method comprises the following steps.

[0277] In step S4401, at least one uplink transmission of the multiple uplink transmissions transmitted by the terminal is received.

[0278] In some embodiments, the multiple uplink transmissions carry the same message MsgA.

[0279] In some embodiments, the multiple uplink transmissions correspond to the same physical uplink shared channel (PUSCH) payload.

[0280] In some embodiments, the same PUSCH payload includes one or more of the following: the same medium access control (MAC) protocol data unit (PDU) in the PUSCH payload; the same MAC service data unit (SDU) in the PUSCH payload.

[0281] In some embodiments, the method further comprises: sending first indication information to the terminal, wherein the first indication information is used to indicate the length of the first time period.

[0282] In some embodiments, the second indication information is carried in the at least one uplink transmission, wherein the second indication information is used to indicate the multiple RA resources or the RA resources occupied by the uplink transmission other than the at least one uplink transmission.

[0283] In some embodiments, the second indication information includes one or more of the following: a first radio network temporary identifier (RNTI) corresponding to the RA resource; a time domain location index corresponding to the RA resource; a frequency domain location index corresponding to the RA resource; a code domain resource index corresponding to the RA resource.

[0284] In some embodiments, the method further comprises:

[0285] According to the second indication information, the RA resource occupied by the first transmitted uplink transmission of the multiple uplink transmissions is determined; according to the RA resource occupied by the first transmitted uplink transmission, a second radio network temporary identifier (RNTI) is determined; and based on the second RNTI, a response message is sent to the terminal.

[0286] In some embodiments, the method further includes receiving first information sent by the terminal, wherein the first information is used to indicate whether the terminal supports sending multiple uplink transmissions.

[0287] In some embodiments, the method further includes configuring, for the terminal, RA resources used for the multiple uplink transmissions, when the terminal supports sending multiple uplink transmissions.

[0288] The implementation of step S4401 can refer to the related steps and implementation manners in FIG. 2, which will not be described here.

[0289] FIG. 5 is a flow diagram of a random access method according to an embodiment of the present disclosure. As shown in FIG. 5, the method according to an embodiment of the present disclosure is used in the communication system 100, and the method includes the following steps:

[0290] In step S5101, the terminal determines multiple random access (RA) resources.

[0291] The terminal can randomly select multiple RA resources in an RA resource pool, or the terminal can receive multiple RA resources configured by the network device.

[0292] In step S5102, the terminal 101 sends multiple uplink transmissions to the network device using the multiple RA resources respectively.

[0293] The multiple uplink transmissions carry the same message MsgA.

[0294] The optional implementation manners of steps S5101 and S5102 can refer to the steps and related parts involved in the above-mentioned embodiment of FIG. 2.

[0295] In the present embodiment or example, each step can be independent, arbitrarily combined or exchanged in order, the optional manners or examples can be arbitrarily combined, and can be arbitrarily combined with any step of other embodiments or other examples.

[0296] The random access method provided by the present disclosure will be further described below in combination with the following embodiments.

[0297] When the terminal sends the first message of random access, the terminal selects multiple different random access resources and sends multiple first messages of random access on the selected multiple random access resources.

[0298] Optionally, the random access resources include one or more combinations of the following: time domain resources, frequency domain resources, code domain resources. The code domain resources are, for example, different Preambles and different DM-RSs.

[0299] Optionally, the first message of the random access comprises a preamble and / or a PUSCH payload.

[0300] Optionally, the random access is a 2-step RA.

[0301] Optionally, the terminal is an NTN terminal or a TN terminal, and the network is an NTN network or a TN network.

[0302] Optionally, when the terminal transmits the first message of the random access, the first message comprises a preamble and a PUSCH payload, and the subsequent first message comprises only a PUSCH payload or a preamble and a PUSCH payload.

[0303] Optionally, when the terminal transmits the first message of the random access, the PUSCH payload is the same.

[0304] Optionally, the same PUSCH payload comprises one or more of the following: the MAC PDU in the PUSCH payload is the same; and the MAC SDU in the PUSCH payload is the same.

[0305] Optionally, when the terminal transmits the first message of the random access, the following one or more combinations are adopted: the same preamble code is used for each first message; the same random access resource corresponding to the same downlink beam is used for each first message; a preamble code is randomly selected for each first message, but the preamble group of the selected preamble code is the same; a preamble code is randomly selected for each first message, and the preamble code can be selected from different preamble groups; the preamble code of each first message is transmitted in a different RO in the time domain; the preamble code of each first message is transmitted in a randomly selected FDM in the frequency domain; the preamble code of each first message is transmitted in a different time domain, frequency domain, and code domain; the time-frequency resource of the PUSCH of each first message is the same, but the DM-RS is different, or the time-frequency resource and the DM-RS are the same, or the time domain resource is different, but the frequency domain resource and the DM-RS are the same. The time-frequency resource of the PUSCH of each first message is one-to-one mapped to the resource of the transmitted preamble.

[0306] Optionally, when the UE selects an RO in a different time domain, X ROs in a time period T can be randomly selected, and X is the number of first messages to be transmitted.

[0307] Optionally, the time period T is configured by the network or agreed by the system. The value of X is configured by the network or agreed by the system, such as natural numbers 1, 2, 3, 4, 5, etc.

[0308] Optionally, the resource for the UE to send the multiple first messages has the following ways: must belong to the same BWP; can belong to different BWPs of the same uplink carrier; can belong to different carriers.

[0309] Optionally, the UE carries indication information in the PUSCH payload, and the indication information is used to indicate the random access resource used for sending the first message.

[0310] Optionally, the indication information includes information of the random access resource used for sending each first message, or information of the random access resource used for sending each first message except the current message carrying the indication information.

[0311] Optionally, the indication information is carried by a MAC CE, and the UE must carry the MAC CE when sending the first message.

[0312] Optionally, the indication information includes one or more of the following combinations: indicating the RA-RNTI value corresponding to the random access resource; indicating the time domain position and / or frequency domain position index and / or code resource ID of the code resource corresponding to the random access resource.

[0313] Optionally, the time domain position can be one or more of the following combinations: the lowest several bits of the system frame number, the subframe number, the OFDM symbol index. The code resource ID is, for example, the Preamble ID and / or the DM-RS ID of the PUSCH.

[0314] Optionally, after sending the multiple first messages, the UE waits to receive a response message. The response message is addressed by an RNTI, and the RNTI is determined according to the random access resource used for sending the first first message.

[0315] Optionally, the RNTI can be determined based on the time domain position of the sent Preamble, and / or the frequency domain position, and / or the DM-RS ID of the sent PUSCH.

[0316] Optionally, if the multiple first messages are sent at the same time domain position, the first sending is determined according to the lower or higher frequency domain resource / code domain resource ID.

[0317] Optionally, the network configures a special random access resource for sending the multiple random access first messages, or configures a common random access resource that can be used for sending the multiple random access first messages.

[0318] Optionally, if the network configures a common random access resource for sending the multiple first messages, it is indicated in the common random access resource configuration whether the sending of the multiple first messages is allowed.

[0319] Optionally, the UE reports network capability information to indicate whether the terminal supports the sending of the multiple first messages.

[0320] Optionally, the terminal performs TA adjustment when sending the first first message, but does not perform TA adjustment during the sending of the first first message and the remaining first messages.

[0321] Optionally, the terminal performs phase compensation during the sending of the first first message and the remaining first messages.

[0322] Optionally, the terminal completes one first message attempt for each of the multiple first message sending. The same sending power is used during one first message attempt. The sending power is increased when entering the next first message attempt.

[0323] Embodiments of the present disclosure also propose an apparatus for implementing any of the above methods, for example, an apparatus comprising units or modules for implementing the steps performed by the terminal in any of the above methods. For another example, another apparatus is proposed, comprising units or modules for implementing the steps performed by the network device (such as an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0324] 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.

[0325] 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), and the like. In another implementation, the processor can implement certain functions through a logical relationship of hardware circuits, and the logical relationship of the hardware circuits is fixed or reconfigurable. 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.

[0326] FIG. 6A is a structural schematic diagram of a network device according to an embodiment of the present disclosure. As shown in FIG. 6A, the terminal 6100 can include at least one of a transceiver module 6101, a processing module 6102, and the like. In some embodiments, the processing module is configured to determine a plurality of random access (RA) resources; and the transceiver module is configured to transmit a plurality of uplink transmissions using the plurality of RA resources respectively, wherein the plurality of uplink transmissions carry a same message MsgA.

[0327] In some embodiments, the plurality of uplink transmissions correspond to a same payload of a physical uplink shared channel (PUSCH).

[0328] In some embodiments, the same PUSCH payload includes one or more of the following: a same medium access control (MAC) protocol data unit (PDU) in the PUSCH payload; and a same MAC service data unit (SDU) in the PUSCH payload.

[0329] In some embodiments, the multiple random access (RA) resources satisfy one or more of the following: correspond to the same preamble; correspond to the same downlink beam; correspond to the same preamble group; correspond to different preamble groups; occupy the same time domain location; occupy frequency division multiplexing (FDM) resources; occupy the same frequency domain location; differ in any one of time domain resources, frequency domain resources, and code domain resources; differ in any one of time domain resources, frequency domain resources, and code domain resources of a corresponding physical uplink shared channel (PUSCH); correspond to the same bandwidth part (BWP); correspond to different BWPs of the same uplink carrier; correspond to different carriers.

[0330] In some embodiments, the processing module is further configured to determine, in the first time period, multiple RA resources corresponding to different time domain locations.

[0331] In some embodiments, the processing module is further configured to determine the length of the first time period according to a protocol or according to the received first indication information.

[0332] In some embodiments, the second indication information is carried in the first uplink transmission, and the second indication information is used to indicate the multiple RA resources or RA resources occupied by other uplink transmissions in addition to the first uplink transmission, and the first uplink transmission is one of the multiple uplink transmissions.

[0333] In some embodiments, the second indication information includes one or more of the following: a first radio network temporary identifier (RNTI) corresponding to the RA resource; a time domain location index corresponding to the RA resource; a frequency domain location index corresponding to the RA resource; an identifier of code domain resources corresponding to the RA resource.

[0334] In some embodiments, the processing module is further configured to determine a second RNTI according to an RA resource occupied by a first transmitted uplink transmission of the multiple uplink transmissions, and the sending module is further configured to receive a response message based on the second RNTI.

[0335] In some embodiments, the sending module is further configured to send first information to the network device, and the first information is used to indicate whether the terminal supports transmitting multiple uplink transmissions.

[0336] In some embodiments, the sending module is further configured to receive multiple RA resources configured by the network device.

[0337] In some embodiments, the processing module is further configured to perform time advance (TA) compensation on the first transmitted uplink transmission.

[0338] In some embodiments, the processing module is further configured to perform phase compensation on the uplink transmission other than the first transmitted uplink transmission.

[0339] In some embodiments, the sending module is further configured to use multiple RA resources to respectively send multiple uplink transmissions at the first power.

[0340] In some embodiments, in the case that the response message is not received, the sending module is further configured to re-send the multiple uplink transmissions at a second power, where the second power is greater than the first power.

[0341] Optionally, the transceiver module is configured to perform at least one of the communication steps such as sending and / or receiving performed by the terminal in any of the above methods, which will not be repeated here.

[0342] Optionally, the processing module is configured to perform at least one of the other steps performed by the terminal in any of the above methods, which will not be repeated here.

[0343] FIG. 6B is a structural schematic diagram of another network device according to an embodiment of the present disclosure. As shown in FIG. 6B, the network device 6200 can include at least one of a transceiver module 6201, a processing module 6202, etc. In some embodiments, the transceiver module is configured to receive at least one uplink transmission from a terminal, where the multiple uplink transmissions carry the same message MsgA.

[0344] In some embodiments, the multiple uplink transmissions correspond to the same physical uplink shared channel (PUSCH) payload.

[0345] In some embodiments, the same PUSCH payload includes one or more of the following:

[0346] The same PUSCH payload includes the same medium access control (MAC) protocol data unit (PDU).

[0347] The same PUSCH payload includes the same MAC service data unit (SDU).

[0348] In some embodiments, the sending module is further configured to send first indication information to the terminal, where the first indication information is used to indicate the length of the first time period.

[0349] In some embodiments, the at least one uplink transmission carries second indication information, where the second indication information is used to indicate the multiple RA resources, or to indicate the RA resources occupied by the uplink transmission other than the at least one uplink transmission.

[0350] In some embodiments, the second indication information comprises one or more of the following: a first radio network temporary identifier (RNTI) corresponding to the RA resource; a time domain location index corresponding to the RA resource; a frequency domain location index corresponding to the RA resource; and a code domain resource index corresponding to the RA resource.

[0351] In some embodiments, the processing module is further configured to:

[0352] determine, according to the second indication information, a RA resource occupied by a first transmitted uplink transmission among the multiple uplink transmissions;

[0353] determine, according to the RA resource occupied by the first transmitted uplink transmission, a second radio network temporary identifier (RNTI);

[0354] The transceiver module is further configured to send a response message to the terminal based on the second RNTI.

[0355] In some embodiments, the transceiver module is further configured to receive first information sent by the terminal, wherein the first information is used to indicate whether the terminal supports sending multiple uplink transmissions.

[0356] In some embodiments, the transceiver module is further configured to, when the terminal supports sending multiple uplink transmissions, configure the terminal with the RA resource for the multiple uplink transmissions.

[0357] In some embodiments, the transceiver module can include a sending module and / or a receiving module, which can be separate or integrated together. Alternatively, the transceiver module can be mutually replaced with a transceiver.

[0358] In some embodiments, the processing module can be one module or can include multiple sub-modules. Alternatively, the multiple sub-modules can perform all or part of the steps required by the processing module. Alternatively, the processing module can be mutually replaced with a processor.

[0359] FIG. 7A is a structural schematic diagram of a communication device 7100 according to the embodiments of the present disclosure. The communication device 7100 can be a network device (for example, an access network device, a core network device, etc.), a terminal (for example, a user equipment, etc.), a chip, a chip system, or a processor supporting the network device to implement any of the above methods, or a chip, a chip system, or a processor supporting the terminal to implement any of the above methods. The communication device 7100 can be used to implement the methods described in the above method embodiments, and details can be referred to the descriptions in the above method embodiments.

[0360] As shown in FIG. 7A, the communication device 7100 includes one or more processors 7101. The processor 7101 can be a general processor or a special purpose processor, etc., such as a baseband processor or a central processing unit. The baseband processor can be configured to process communication protocols and communication data, the central processing unit can be configured to control a communication apparatus (e.g., 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 7100 is configured to perform any of the above methods.

[0361] In some embodiments, the communication device 7100 further includes one or more memories 7102 configured to store instructions. Alternatively, all or part of the memory 7102 can be located outside the communication device 7100.

[0362] In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the transceiver 7103 performs at least one of the communication steps such as transmitting and / or receiving in the above methods, and the processor 7101 performs at least one of the other steps.

[0363] In some embodiments, the transceiver can include a receiver and / or a transmitter, which can be separate or integrated together. Alternatively, the terms of transceiver, transceiving unit, transceiver, transceiving circuit, etc. can be replaced by each other, the terms of transmitter, transmitting unit, transmitter, transmitting circuit, etc. can be replaced by each other, and the terms of receiver, receiving unit, receiver, receiving circuit, etc. can be replaced by each other.

[0364] In some embodiments, the communication device 7100 can include one or more interface circuits 7104. Alternatively, the interface circuit 7104 is connected with the memory 7102, and the interface circuit 7104 can be configured to receive signals from the memory 7102 or other devices, and can be configured to send signals to the memory 7102 or other devices. For example, the interface circuit 7104 can read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0365] The communication device 7100 described in the above embodiments can be a network device or a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 can not be limited by FIG. 7A. 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.

[0366] FIG. 7B is a structural schematic diagram of a chip 7200 according to an embodiment of the present disclosure. For the case where the communication device 7100 is a chip or a chip system, the structural schematic diagram of the chip 7200 shown in FIG. 7B can be referred to, but is not limited thereto.

[0367] The chip 7200 includes one or more processors 7201, and the chip 7200 is configured to execute any of the above methods.

[0368] In some embodiments, the chip 7200 further includes one or more interface circuits 7202. Optionally, the interface circuit 7202 is connected to the memory 7203, and the interface circuit 7202 can be configured to receive signals from the memory 7203 or other devices, and the interface circuit 7202 can be configured to send signals to the memory 7203 or other devices. For example, the interface circuit 7202 can read instructions stored in the memory 7203 and send the instructions to the processor 7201.

[0369] In some embodiments, the interface circuit 7202 performs at least one of the communication steps such as sending and / or receiving in the above methods, and the processor 7201 performs at least one of the other steps.

[0370] In some embodiments, the terms interface circuit, interface, transceiver pin, transceiver, and the like can be replaced with each other.

[0371] In some embodiments, the chip 7200 further includes one or more memories 7203 for storing instructions. Optionally, all or part of the memory 7203 can be outside the chip 7200.

[0372] The disclosure further provides a storage medium having stored instructions which, when executed on the communication device 7100, cause the communication device 7100 to perform any of the methods described above. 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 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 be a transitory storage medium.

[0373] The disclosure further provides a program product which, when executed by the communication device 7100, causes the communication device 7100 to perform any of the methods described above. Optionally, the program product is a computer program product.

[0374] The disclosure further provides a computer program which, when executed on a computer, causes the computer to perform any of the methods described above.

[0375] In the above embodiments, all or some of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or some of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs. When the computer programs are loaded on a computer and executed, all or some of the processes or functions described in the embodiments of the disclosure are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer programs can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer programs can be transferred from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media sets. The available media can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a high-density digital video disc (DVD)), or a semiconductor medium (such as a solid state disk (SSD)), etc.

[0376] Those skilled in the art can clearly understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software manner depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the disclosure.

[0377] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0378] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A random access method, characterized by, The method is performed by a terminal, and the method comprises: determining a plurality of random access (RA) resources; transmitting a plurality of uplink transmissions respectively using the plurality of RA resources, wherein the plurality of uplink transmissions carry a same message (MsgA).

2. The method of claim 1, wherein, The plurality of uplink transmissions correspond to a same physical uplink shared channel (PUSCH) payload.

3. The method of claim 2, wherein, The same PUSCH payload comprises one or more of the following: a same medium access control (MAC) protocol data unit (PDU) in the PUSCH payload; a same MAC service data unit (SDU) in the PUSCH payload.

4. The method according to any one of claims 1 to 3, characterized in that, The plurality of RA resources satisfy one or more of the following: correspond to a same preamble; correspond to a same downlink beam; correspond to a same preamble group; correspond to different preamble groups; correspond to random access occasions (ROs) in different time domain locations; correspond to RO resources that are frequency division multiplexed (FDM); correspond to RO resources in a same frequency domain location; any one of time domain resources, frequency domain resources, and code domain resources occupied by corresponding preambles is different; any one of time domain resources, frequency domain resources, and code domain resources occupied by corresponding PUSCHs is different; time-frequency domain resources occupied by a PUSCH corresponding to each RA resource correspond one-to-one to time-frequency domain resources occupied by a preamble corresponding to the RA resource; belong to a same bandwidth part (BWP); belong to different BWPs of a same uplink carrier; belong to different carriers.

5. The method according to any one of claims 1 to 4, characterized in that, The determining of the plurality of RA resources comprises: determining, in a first time period, a plurality of RA resources corresponding to ROs in different time domain locations.

6. The method of claim 5, wherein, The method further comprises: determining a length of the first time period according to a protocol agreement; or determining the length of the first time period according to received first indication information.

7. The method of any one of claims 1-6, wherein, The first uplink transmission carries second indication information, wherein the second indication information is used to indicate the plurality of RA resources or RA resources occupied by uplink transmissions other than the first uplink transmission, the first uplink transmission being one of the plurality of uplink transmissions.

8. The method of claim 7, wherein, The second indication information comprises one or more of the following: a first radio network temporary identifier (RNTI) corresponding to the RA resource; a time domain location index corresponding to the RA resource; a frequency domain location index corresponding to the RA resource; a code domain resource index corresponding to the RA resource.

9. The method of any one of claims 1-8, wherein, The method further comprises: determining a second RNTI according to an RA resource used by a first transmitted uplink transmission of the plurality of uplink transmissions; receiving a response message based on the second RNTI.

10. The method of any one of claims 1-9, wherein, The method further comprises: transmitting first information to a network device, wherein the first information is used to indicate whether the terminal supports transmitting a plurality of uplink transmissions.

11. The method of claim 10, wherein, The method further comprises: receiving the plurality of RA resources configured by the network device.

12. The method of any one of claims 1-11, wherein, Before the transmitting of the plurality of uplink transmissions using the plurality of RA resources, the method further comprises: performing time advance (TA) compensation on a first transmitted uplink transmission.

13. The method of any one of claims 1-12, wherein, The method further includes: performing phase compensation on the uplink transmission other than the first transmitted uplink transmission.

14. The method of any one of claims 1-13, wherein, The using the multiple RA resources to respectively transmit multiple uplink transmissions includes: using the multiple RA resources to respectively transmit multiple uplink transmissions at a first power.

15. The method of claim 14, wherein, After the using the multiple RA resources to respectively transmit multiple uplink transmissions at a first power, the method further includes: retransmitting the multiple uplink transmissions at a second power in a case where a response message is not received, wherein the second power is greater than the first power.

16. A random access method, comprising: The method is performed by a network device, and the method includes: receiving at least one of multiple uplink transmissions transmitted by a terminal, wherein the multiple uplink transmissions carry a same message MsgA.

17. The method of claim 16, wherein, PUSCH payloads corresponding to the multiple uplink transmissions are same.

18. The method of claim 17, wherein, The same PUSCH payloads include one or more of the following: a same medium access control (MAC) protocol data unit (PDU) in the PUSCH payloads; a same MAC service data unit (SDU) in the PUSCH payloads.

19. The method of any one of claims 16-18, wherein, The method further includes: transmitting first indication information to the terminal, wherein the first indication information is used to indicate a length of a first time period.

20. The method of any one of claims 16-19, wherein, The at least one uplink transmission carries second indication information, wherein the second indication information is used to indicate the multiple RA resources or RA resources occupied by uplink transmissions other than the at least one uplink transmission.

21. The method of claim 20, wherein, The second indication information includes one or more of the following: a first radio network temporary identifier (RNTI) corresponding to the RA resources; a time domain location index corresponding to the RA resources; a frequency domain location index corresponding to the RA resources; a code domain resource index corresponding to the RA resources.

22. The method of any one of claims 20 or 21, wherein, The method further includes: determining, according to the second indication information, RA resources used by a first transmitted uplink transmission of the multiple uplink transmissions; determining a second radio network temporary identifier (RNTI) according to the RA resources used by the first transmitted uplink transmission; transmitting a response message to the terminal based on the second RNTI.

23. The method of any one of claims 16-22, wherein, The method further includes: receiving first information transmitted by the terminal, wherein the first information is used to indicate whether the terminal supports transmitting multiple uplink transmissions.

24. The method of claim 23, wherein, The method further includes: configuring, for the terminal, RA resources used by the multiple uplink transmissions in a case where the terminal supports transmitting the multiple uplink transmissions.

25. A random access method, comprising: The method is performed by a communication system, and the method includes: a terminal determines multiple random access (RA) resources; the terminal uses the multiple RA resources to respectively transmit multiple uplink transmissions to a network device, wherein the multiple uplink transmissions carry a same message MsgA.

26. A terminal, characterized by The terminal includes: a processing module configured to determine multiple random access (RA) resources; a transceiver configured to use the multiple RA resources to respectively transmit multiple uplink transmissions, wherein the multiple uplink transmissions carry a same message MsgA.

27. A network device, comprising: The network device includes: a transceiver configured to receive at least one of multiple uplink transmissions transmitted by a terminal, wherein the multiple uplink transmissions carry a same message MsgA.

28. A communications device, characterized by The apparatus includes: one or more processors; The apparatus is configured to perform the random access method in any of claims 1-15, or the uplink transmission method in any of claims 16-24.

29. A communication system, characterized by The apparatus comprises a terminal configured to implement the uplink transmission method in any of claims 1-15, and a network device configured to implement the uplink transmission method in any of claims 16-24.

30. A storage medium, the storage medium storing instructions, wherein, The instructions, when executed on the communication device, cause the communication device to perform the uplink transmission method in any of claims 1-15 or 16-24.

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