Random access method and communication apparatus

Abstract

A random access method and a communication apparatus, relating to the technical field of communications. In the method, upon a terminal device determining that transmission of a first preamble transmitted by means of a first random access resource associated with a first SSB has failed, the terminal device selects a second SSB from a first SSB group associated with the first SSB, the second SSB being different from the first SSB, and transmits a second preamble by means of a second random access resource associated with the second SSB. In this way, the terminal device can re-select an SSB from the first SSB group associated with the first SSB, and transmit the preamble by means of the random access resource associated with the SSB, so that a random access procedure does not need to be re-initiated directly by means of increasing the transmit power of the preamble, which can support reducing the power consumption of the terminal device.

Description

Method and communication apparatus for random access

[0001] This application claims priority to the Chinese Patent Application No. 202410526373.6, filed on April 28, 2024, entitled "Method and communication apparatus for random access", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, and more particularly, to a method and communication apparatus for random access. BACKGROUND

[0003] When a terminal device transmits data to a network device, it generally needs to establish uplink synchronization with the network device. When the terminal device and the network device have not established uplink synchronization, the terminal device generally needs to first obtain uplink synchronization through a contention-based four-step random access procedure or a two-step random access procedure, and then perform uplink data transmission.

[0004] In the random access procedure (four-step random access procedure or two-step random access procedure), the network device sends a plurality of synchronization signal blocks (SSBs) to the terminal device, the terminal device measures the plurality of SSBs, selects an SSB with a signal reception strength greater than a threshold, and uses one of a plurality of physical random access channel (PRACH) resources associated with the SSB to transmit a preamble. The transmission beam direction of the preamble is determined by the beam direction corresponding to the SSB. The network device receives the preamble through the PRACH resource in the beam direction corresponding to the SSB.

[0005] When the preamble transmission fails, the terminal device retransmits the preamble to the network device by increasing the transmission power of the preamble, and then reinitiates the random access procedure. However, the above scheme can cause high power consumption of the terminal device. SUMMARY

[0006] The present application provides a method and communication apparatus for random access, which can support the terminal device to reinitiate the random access procedure with low power consumption.

[0007] In a first aspect, a method for random access is provided, including: receiving first information, the first information indicating that a first SSB group is associated with a first SSB, the first SSB group including one or more SSBs; when a first preamble sent on a first random access resource associated with the first SSB fails to be sent, sending a second preamble through a second random access resource, the second random access resource being associated with a second SSB, the first SSB group including the second SSB, and the first SSB being different from the second SSB.

[0008] The solution of the first aspect can be implemented by a first device, which can be a terminal device, a module (such as a chip system) in the terminal device, or a logic node, a logic module, or software capable of implementing all or part of the functions of the terminal device. That is, the execution subject of the solution of the first aspect can be a terminal device, a module (such as a chip system) in the terminal device, or a logic node, a logic module, or software capable of implementing all or part of the functions of the terminal device, which is not limited. For ease of description, the terminal device is taken as an example in the following description.

[0009] When the terminal device determines that the first preamble fails to be sent, the terminal device selects a second SSB from the first SSB group associated with the first SSB, and sends a second preamble through a second random access resource associated with the second SSB. In this way, the terminal device can reselect an SSB from the first SSB group associated with the first SSB, and send a preamble through a random access resource associated with the SSB, thereby not needing to directly reinitiate a random access process by increasing the sending power of the preamble, which can support reducing the power consumption of the terminal device. In addition, since the terminal device reselects an SSB associated with a random access resource from the SSB group configured by the network device to reinitiate a random access process, this can support improving the success probability of the terminal device reinitiating a random access process.

[0010] In a second aspect, a method for random access is provided, including: determining first information, the first information indicating that a first SSB group is associated with a first SSB, the first SSB group including one or more SSBs, and a first preamble sent on a first random access resource associated with the first SSB being a preamble that fails to be sent; and sending the first information, the first information being used to determine a second random access resource, the second random access resource being used to send a second preamble, the second random access resource being associated with a second SSB, the first SSB group including the second SSB, and the first SSB being different from the second SSB.

[0011] The scheme of the second aspect can be executed by a second device, which can be a network device, a module (such as a chip system) in the network device, or a logic node, a logic module, or software capable of realizing all or part of the functions of the network device. That is, the execution subject of the scheme of the second aspect can be a network device, a module (such as a chip system) in the network device, or a logic node, a logic module, or software capable of realizing all or part of the functions of the network device, which is not limited. For ease of description, the network device is taken as an example in the following description.

[0012] The network device configures a first SSB group for the first SSB. After the terminal device determines that the first preamble sent on the first random access resource associated with the first SSB fails, the terminal device determines the first SSB group associated with the first SSB according to the first information, and selects one SSB from the first SSB group, and re-sends the preamble through the random access resource associated with the SSB, which can make the terminal device not need to directly re-initiate the random access process by increasing the sending power of the preamble, which can support reducing the power consumption of the terminal device.

[0013] In combination with any one of the first aspect and the second aspect, the configuration parameters of the random access resource associated with the SSBs other than the first SSB in the first SSB group are different from the configuration parameters of the random access resource associated with the first SSB.

[0014] When the configuration parameters of the random access resource associated with the first SSB are different from the configuration parameters of the random access resource associated with the SSBs other than the first SSB, this is conducive to reducing the resource occupation of the preamble.

[0015] For example, the random access resource associated with the first SSB is used for the terminal device to send the preamble to the first network device, and the random access resource associated with the second SSB is used for the terminal device to send the preamble to the second network device. Since the terminal device is closer to the second network device and farther from the first network device, the terminal device does not need to occupy more time-frequency resources to send the preamble to the second network device, and needs to occupy more time-frequency resources to send the preamble to the first network device. When the terminal device sends the preamble to the second network device through the random access resource associated with the second SSB, the terminal device does not need to occupy more time-frequency resources.

[0016] In any of the first aspect and the second aspect, the first SSB group comprises a first type of SSB, and the first type of SSB is determined according to a third SSB. The third SSB satisfies any of the following conditions: the third SSB comprises part or all of the second type of SSB, the third SSB comprises a fourth SSB, the fourth SSB does not belong to the first SSB group, or the third SSB comprises part or all of the second type of SSB and further comprises the fourth SSB.

[0017] By introducing the first type of SSB, the terminal device can send a preamble in the beam direction associated with the first type of SSB, and is no longer limited to the beam direction corresponding to the second type of SSB, thereby supporting improving the success rate of the random access procedure re-initiated by the terminal device. For example, the beam direction associated with the first type of SSB can cover a direction that is not covered by the beam direction associated with the SSB in the current cell.

[0018] Optionally, the first SSB group further comprises the second type of SSB.

[0019] In any of the first aspect and the second aspect, the first type of SSB is determined according to a third SSB, and comprises at least one of the following: a beam direction corresponding to the first type of SSB is determined according to a beam direction corresponding to the third SSB; or a path loss corresponding to the first type of SSB is determined according to a path loss corresponding to the third SSB.

[0020] In the above manner, the embodiments of the present application can support forming the first type of SSB.

[0021] In any of the first aspect and the second aspect, the first type of SSB is an SSB without a downlink time-frequency resource configuration, and the second type of SSB is an SSB with a downlink time-frequency resource configuration.

[0022] When the first type of SSB is an SSB without a downlink time-frequency resource configuration, the network device does not need to send a downlink signal through the first type of SSB, which will not cause interference to the neighboring cell and will not occupy more time-frequency resources. In addition, the network device does not need to adjust the existing configuration of the time-frequency resource of the SSB.

[0023] In any of the first aspect and the second aspect, the configuration parameters of the random access resource associated with the first type of SSB are different from the configuration parameters of the random access resource associated with the second type of SSB.

[0024] In this way, the configuration parameters of the random access resource can be configured for different types of SSBs respectively, which can support the terminal device to select different configuration parameters of the random access resource. Meanwhile, this can enhance the flexibility of the configuration of the random access resource.

[0025] In combination with any one of the first aspect and the second aspect, the second SSB is a first type of SSB.

[0026] In this way, the network device does not need to configure the downlink time-frequency resource for the second SSB.

[0027] In combination with any one of the first aspect and the second aspect, the second preamble is determined according to only the message 3 payload.

[0028] In this way, the selection rule of the second preamble can be simplified, so that the terminal device can more easily determine the second preamble.

[0029] In combination with any one of the first aspect and the second aspect, the second preamble is determined according to only the message 3 payload, including: when the message 3 payload is less than or equal to a threshold, the second preamble belongs to a preamble group A, or when the message 3 payload is greater than or equal to the threshold, the second preamble belongs to a preamble group B.

[0030] In combination with any one of the first aspect and the second aspect, the transmission power of the first preamble is less than the transmission power of the second preamble.

[0031] In this way, this can support improving the success probability of the random access procedure reinitiated by the terminal device.

[0032] In combination with any one of the first aspect and the second aspect, the configuration parameters of the random access resource include at least one of the following: a preamble format, a path loss, a reception target power, a maximum retransmission number, a power boosting step, an association manner between the random access resource and the SSB, a B group preamble message selection, or a number of random access resources.

[0033] The third aspect provides a random access method, including: receiving second information, the second information including configuration information of a first type of SSB, the first type of SSB being a SSB determined according to a fifth SSB, the fifth SSB including part or all of a second type of SSB, the first type being different from the second type; and transmitting a preamble through a random access resource associated with a second SSB, the second SSB belonging to the first type of SSB.

[0034] The scheme of the third aspect can be executed by a third device, which can be a terminal device, a module (such as a chip system) in the terminal device, or a logic node, a logic module, or software capable of realizing all or part of the functions of the terminal device. That is, the execution subject of the scheme of the third aspect can be a terminal device, a module (such as a chip system) in the terminal device, or a logic node, a logic module, or software capable of realizing all or part of the functions of the terminal device, which is not limited. For ease of description, the terminal device is taken as an example in the following description.

[0035] Since the second SSB is a SSB determined according to the second type of SSB, the beam direction associated with the second SSB can be aligned with the network device. When the terminal device transmits a preamble through the random access resource associated with the second SSB, the network device can receive the preamble, thereby facilitating the completion of the random access process between the terminal device and the network device.

[0036] In a fourth aspect, a method for random access is provided, comprising: determining second information, the second information comprising configuration information of a first type of SSB, the first type of SSB being a SSB determined according to a fifth SSB, the fifth SSB comprising part or all of the second type of SSB, the first type being different from the second type; and transmitting the second information.

[0037] The scheme of the fourth aspect can be executed by a fourth device, which can be a network device, a module (such as a chip system) in the network device, or a logic node, a logic module, or software capable of realizing all or part of the functions of the network device. That is, the execution subject of the scheme of the fourth aspect can be a network device, a module (such as a chip system) in the network device, or a logic node, a logic module, or software capable of realizing all or part of the functions of the network device, which is not limited. For ease of description, the network device is taken as an example in the following description.

[0038] Since the second SSB is a SSB determined according to the second type of SSB, the beam direction associated with the second SSB can be aligned with the network device. When the terminal device transmits a preamble through the random access resource associated with the second SSB, the network device can receive the preamble, thereby facilitating the completion of the random access process between the terminal device and the network device.

[0039] In combination with any one of the third aspect and the fourth aspect, the first type of SSB is a SSB determined according to a fifth SSB, comprising at least one of the following: a beam direction corresponding to the first type of SSB is determined according to a beam direction corresponding to the fifth SSB; or a path loss corresponding to the first type of SSB is determined according to a path loss corresponding to the fifth SSB.

[0040] In the above manner, the embodiment of the present application can support the formation of the first type of SSB.

[0041] In combination with any one of the third aspect and the fourth aspect, the first type of SSB is an SSB without downlink time-frequency resource configuration, and the second type of SSB is an SSB with downlink time-frequency resource configuration.

[0042] When the first type of SSB is an SSB without downlink time-frequency resource configuration, the network device does not need to send a downlink signal through the first type of SSB, which does not cause interference to neighboring areas and does not occupy more time-frequency resources. In addition, the network device does not need to adjust the existing configuration of the time-frequency resources of the SSB.

[0043] In combination with any one of the third aspect and the fourth aspect, the configuration parameters of the random access resource associated with the first type of SSB are different from the configuration parameters of the random access resource associated with the second type of SSB.

[0044] In this way, the configuration parameters of the random access resource can be configured for different types of SSBs respectively, which can support the terminal device to select different configuration parameters of the random access resource.

[0045] In combination with any one of the third aspect and the fourth aspect, the configuration parameters of the random access resource include at least one of the following: a preamble format, a path loss, a target receiving power, a maximum retransmission number, a power step-up step, an association manner between the random access resource and the SSB, a B-group preamble message selection, or a number of random access resources.

[0046] In a fifth aspect, a communication apparatus is provided, which can be a terminal device, or a device or module for performing the functions of a terminal device, etc.

[0047] In a possible implementation, the communication apparatus can include a module or unit corresponding to each of the methods / operations / steps / actions described in the first aspect, which can be a hardware circuit, software, or a combination of hardware circuit and software.

[0048] In a possible implementation, the communication apparatus can include a module or unit corresponding to each of the methods / operations / steps / actions described in the third aspect, which can be a hardware circuit, software, or a combination of hardware circuit and software.

[0049] In a sixth aspect, a communication apparatus is provided, which can be a network device, or a device or module for performing the functions of a network device, etc.

[0050] In a possible implementation, the communication apparatus can include a module or unit corresponding to each of the methods / operations / steps / actions described in the second aspect, which can be a hardware circuit, software, or a combination of hardware circuit and software.

[0051] In a possible implementation, the communication apparatus can include a module or unit corresponding to each of the methods / operations / steps / actions described in the fourth aspect, which can be a hardware circuit, software, or a combination of hardware circuit and software.

[0052] In a seventh aspect, a communication apparatus is provided, including a processor configured to cause the communication apparatus to perform the method described in the first aspect and any possible implementation of the first aspect, or to perform the method described in the second aspect and any possible implementation of the second aspect, or to perform the method described in the third aspect and any possible implementation of the third aspect, or to perform the method described in the fourth aspect and any possible implementation of the fourth aspect, by executing computer programs or instructions, or by a logic circuit.

[0053] In a possible implementation, the communication apparatus further includes a memory configured to store the computer programs or instructions.

[0054] Optionally, the memory and the processor are integrated together.

[0055] In a possible implementation, the communication apparatus further includes a communication interface configured to input and / or output signals.

[0056] In an eighth aspect, a communication apparatus is provided, including a logic circuit and an input / output interface configured to input and / or output signals, and the logic circuit is configured to perform the method described in the first aspect and any possible implementation of the first aspect, or to perform the method described in the second aspect and any possible implementation of the second aspect, or to perform the method described in the third aspect and any possible implementation of the third aspect, or to perform the method described in the fourth aspect and any possible implementation of the fourth aspect.

[0057] In a ninth aspect, a computer readable storage medium is provided, and the computer readable storage medium has stored thereon a computer program or instructions, which, when executed on a computer, cause the method described in the first aspect and any possible implementation of the first aspect to be performed; or cause the method described in the second aspect and any possible implementation of the second aspect to be performed; or cause the method described in the third aspect and any possible implementation of the third aspect to be performed; or cause the method described in the fourth aspect and any possible implementation of the fourth aspect to be performed.

[0058] In a tenth aspect, a computer program product is provided, and the computer program product contains instructions, which, when executed on a computer, cause the method described in the first aspect and any possible implementation of the first aspect to be performed; or cause the method described in the second aspect and any possible implementation of the second aspect to be performed; or cause the method described in the third aspect and any possible implementation of the third aspect to be performed; or cause the method described in the fourth aspect and any possible implementation of the fourth aspect to be performed.

[0059] In an eleventh aspect, a chip system is provided, and the chip system comprises a processor configured to execute computer programs or instructions in the memory, so that the chip system implements the method in the first aspect and any possible implementation of the first aspect; or so that the chip system implements the method in the second aspect and any possible implementation of the second aspect; or so that the chip system implements the method in the third aspect and any possible implementation of the third aspect; or so that the chip system implements the method in the fourth aspect and any possible implementation of the fourth aspect.

[0060] The beneficial effects of the fifth aspect to the eleventh aspect can be referred to the beneficial effects of the first aspect to the fourth aspect, and will not be described again. BRIEF DESCRIPTION OF DRAWINGS

[0061] FIG. 1 is a schematic diagram of a communication system 100 to which embodiments of the present application are applicable.

[0062] FIG. 2 is a schematic diagram of an application scenario 200 of embodiments of the present application.

[0063] FIG. 3 is a schematic diagram of a four-step random access procedure 300.

[0064] FIG. 4 is a schematic diagram of a two-step random access procedure 400.

[0065] FIG. 5 is a schematic diagram of an interaction flow of a random access method 500 of embodiments of the present application.

[0066] FIG. 6 is a schematic diagram of an interaction flow of a random access method 600 of embodiments of the present application.

[0067] Figure 7 is a schematic block diagram of a communication apparatus 700 according to an embodiment of the present application.

[0068] Figure 8 is a schematic block diagram of a communication apparatus 800 according to an embodiment of the present application. DETAILED DESCRIPTION

[0069] In order to facilitate understanding of the embodiments of the present application, the following points are first explained.

[0070] I. Unless otherwise stated, the meaning of "a plurality" is two or more.

[0071] II. If there is no special statement and no logical conflict, the terms and / or descriptions between different embodiments of the present application are consistent and can be mutually referred to. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0072] III. The various numerical numbers involved in the present application are only used for differentiation for the convenience of description, and are not used to limit the protection scope of the present application. The size of the serial numbers involved in the present application does not mean the execution order. The execution order of each process should be determined according to its function and inherent logic. For example, the terms "first", "second", "third", "fourth" and other various term labels in the specification and claims of the present application and the drawings (if any) are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. Where appropriate, the data thus used can be interchanged, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein.

[0073] Meanwhile, any embodiment or design scheme described as "exemplary" or "for example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of "exemplary" or "for example" is intended to present the relevant concept in a specific manner for ease of understanding.

[0074] IV. The terms "comprising" and "having" and any variations thereof are intended to cover not exclusively containing, for example, a process, method, system, product or device comprising a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0075] V. In the present application, "indication" can include direct indication, indirect indication, display indication, and implicit indication. When describing certain indication information for indicating A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0076] In the present application, the information indicated by the indication information is referred to as to-be-indicated information. In the specific implementation process, there are many ways to indicate the to-be-indicated information, for example, but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or the index of the to-be-indicated information. The to-be-indicated information can also be indirectly indicated by indicating other information, wherein the other information and the to-be-indicated information have an association relationship. The to-be-indicated information can also be only indicated in part, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of specific information can also be achieved by means of the arrangement order of each information agreed in advance (for example, the protocol stipulates), thereby reducing the indication overhead to a certain extent. In addition, the to-be-indicated information can be sent as a whole, or can be sent separately into multiple sub-information, and the sending period and / or sending opportunity of these sub-information can be the same or different.

[0077] Sixthly, in the present application, “pre-configuration” can include pre-definition, for example, protocol definition. Wherein, the “pre-definition” can be realized by pre-saving the corresponding code, table or other information indicating manner in the device (for example, including various network elements), and the present application does not limit the specific implementation manner thereof.

[0078] Seventhly, the “storage” or “saving” involved in the present application can refer to saving in one or more memories. The one or more memories can be separately arranged, or can be integrated in the encoder or decoder, processor, or communication device. The one or more memories can also be partially separately arranged and partially integrated in the decoder, processor, or communication device. The type of memory can be any form of storage medium, which is not limited.

[0079] Eighthly, the “protocol” involved in the present application can refer to a standard protocol in the communication field, which can include, for example, the fourth generation (4 th generation, 5G) network protocol, NR protocol, 5.5G network protocol, sixth generation (6 th generation, 5G) network protocol, NR protocol, 5.5G network protocol, sixth generation (6 th generation, 6G) network protocol and related protocols applied to future communication systems, which is not limited by the present application.

[0080] Ninthly, the arrows or blocks shown by the dashed lines in the schematic diagrams in the drawing part of the present application specification represent optional steps or optional modules.

[0081] X, unless specified otherwise. For example, A / B can mean A or B. The term "and / or" in the present application means that there can be three possible cases: for example, A and / or B can mean: A alone, A and B together, or B alone, where A and B can be singular or plural.

[0082] Eleven, in the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as the destination of the information is XX, which can include direct transmission through the air interface, or indirect transmission through the air interface by other units or modules. "Receiving information from YY" can be understood as the source of the information is YY, which can include direct reception from YY through the air interface, or indirect reception from YY through the air interface from other units or modules. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface. In other words, sending and receiving can be between devices, such as between network devices and terminal devices, or within devices, such as between components, modules, chips, software modules or hardware modules within devices through buses, wires or interfaces.

[0083] The technical solutions provided in the present application can be applied to various communication systems, such as 5G or NR systems, LTE systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc. The technical solutions provided in the present application can also be applied to future communication systems, such as 6G communication systems.

[0084] The technical solutions provided in the present application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and internet of things (IoT) communication systems or other communication systems.

[0085] The terminal devices in this application include various devices with wireless communication capabilities, which can be used to connect people, objects, machines, etc. These terminal devices can be widely applied in various scenarios, such as: cellular communication, D2D, V2X, peer-to-peer (P2P), M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery, and other scenarios.

[0086] The terminal device can be a terminal in any of the above scenarios, such as an MTC terminal, an IoT terminal, etc. The terminal device can be a third-generation partner project (3GPP). rd User equipment (UE), terminal, fixed equipment, mobile station equipment or mobile equipment, subscriber unit, handheld device, vehicle-mounted equipment, wearable device, cellular phone, smartphone, SIP phone, wireless data card, personal digital assistant (PDA), computer, tablet computer, laptop computer, wireless modem, handset, laptop computer, computer with wireless transceiver capability, smart book, vehicle, satellite, global positioning system (GPS) device, target tracking device, aircraft (e.g., drone, helicopter, multi-helicopter, quad-helicopter, or airplane), ship, remote control device, smart home device, industrial equipment, or devices built into the above devices (e.g., communication modules, modems, or chips in the above devices), or other processing devices connected to a wireless modem, all conforming to the Generation Partnership Project (3GPP) standard. For ease of description, the terminal equipment will be described below using the term terminal or UE as an example.

[0087] In certain scenarios, terminal devices can also be used as base stations. For example, a terminal device can act as a scheduling entity, providing sidelink signals between UEs in scenarios such as V2X, D2D, or P2P.

[0088] In the embodiments of the present application, the device for implementing the function of the terminal device can be a terminal device, or a device capable of supporting the terminal device to implement the function, such as a chip system or a chip, which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0089] The network device in the embodiments of the present application can be a device for communicating with the terminal device, which can also be referred to as an access network device or a radio access network device, such as a network device, which can be a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) for accessing the terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), primary station, secondary station, motor slide retainer (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, modem or chip for being arranged in the foregoing devices or apparatuses. The base station can also be a mobile switching center and a device assuming a base station function in D2D, V2X, M2M communication, a network side device in a 6G network, a device assuming a base station function in a future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0090] The base station can be fixed or mobile. For example, a helicopter or a drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, the helicopter or the drone can be configured to serve as a device communicating with another base station.

[0091] In an embodiment of the present application, the apparatus for implementing the function of the network device can be a network device, or can be an apparatus capable of supporting the network device to implement the function, such as a chip system or a chip, which can be installed in the network device. In an embodiment of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0092] The network device and the terminal device can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on the water surface; and can also be deployed on the aircraft, balloon and satellite in the air. The scene where the network device and the terminal device are located is not limited in the embodiments of the present application.

[0093] FIG. 1 is a schematic diagram of a communication system 100 to which embodiments of the present application are applicable. The communication system 100 includes a radio access network (RAN) 100 and a core network (CN) 200. The RAN 100 includes at least one RAN node (e.g., 110a and 110b, collectively referred to as 110) and at least one terminal device (e.g., 120a-120j, collectively referred to as 120). The RAN 100 can further include other RAN nodes, such as a wireless relay device and / or a wireless backhaul device (not shown in FIG. 1), and the like. The terminal device 120 is connected to the RAN node 110 in a wireless manner. The RAN node 110 is connected to the core network 200 in a wireless or wired manner. The core network device in the core network 200 and the RAN node 110 in the RAN 100 can be different physical devices respectively, or can be the same physical device integrated with the logical functions of the core network and the logical functions of the radio access network.

[0094] The RAN 100 can be a 3GPP related cellular system, such as a 4G, 5G mobile communication system, or a future-oriented evolution system (such as a 6G mobile communication system). The RAN 100 can also be an open RAN (O-RAN or ORAN), a cloud RAN (CRAN), a wireless fidelity (WiFi) system. The RAN 100 can also be a communication system in which two or more of the above systems are integrated.

[0095] The RAN node 110, which can also be referred to as an access network device, a RAN entity, or an access node, etc., forms part of the communication system and is configured to facilitate wireless access by the terminal devices. The RAN nodes 110 in the communication system can be the same type of node or different types of nodes. In some scenarios, the roles of the RAN node 110 and the terminal device 120 are relative, e.g., the network element 120i can be a helicopter or a drone, which can be configured to move as a mobile base station for terminal devices 120j accessing the RAN 100 via the network element 120i. For the base station 110a, the network element 120i is a terminal device. The RAN nodes 110 and the terminals 120 are sometimes referred to as communication apparatuses, e.g., the network elements 110a and 110b can be understood as communication apparatuses with base station functionality, and the network elements 120a-120j can be understood as communication apparatuses with terminal functionality.

[0096] In a possible scenario, the RAN node can be a BS, an eNodeB, an access point (AP), a TRP, a gNB, a next generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc. The RAN node can be a macro base station (e.g., 110a in FIG. 1), a micro base station or an indoor station (e.g., 110b in FIG. 1), a relay node or a donor node, or a wireless controller in a CRAN scenario.

[0097] Optionally, the RAN node can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, the access network device in V2X technology can be a road-side unit (RSU) or a base station. All or part of the functions of the RAN node in this application can also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (e.g., a cloud platform). The RAN node in this application can also be a logical node, a logical module or software that can implement all or part of the functions of the RAN node.

[0098] In another possible scenario, a terminal device is assisted by multiple RAN nodes to implement wireless access, and different RAN nodes respectively implement part of functions of a base station. For example, a RAN node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the DU can be separately configured, or can be included in the same network element, for example, in a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, for example, in a remote radio unit (RRU), an active antenna processing unit (AAU), or a remote radio head (RRH).

[0099] In different communication systems, the CU (or CU-CP and CU-UP), the DU, or the RU can also have different names, but those skilled in the art can understand their meanings. For example, in an open radio access network (ORAN) system, the CU can also be referred to as an O-CU (open CU), the DU can also be referred to as an O-DU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. For the convenience of description, the CU, the CU-CP, the CU-UP, the DU, and the RU are taken as examples for description in this application. Any one of the CU (or the CU-CP, the CU-UP), the DU, and the RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0100] The number of devices in the communication system described above is only illustrative, and is not limited thereto. In actual applications, the communication system can further include more terminal devices, more RAN devices, and can further include other devices.

[0101] One possible example of FIG. 1 is described below in combination with FIG. 2.

[0102] FIG. 2 is a schematic diagram of an application scenario 200 of an embodiment of the present application. In the application scenario 200, a first network device directly performs downlink data transmission with a terminal device, for example, the first network device directly sends downlink data to the terminal device. When performing uplink data transmission, the terminal device sends uplink data to a second network device, and the second network device sends the uplink data to the first network device. The first network device and the second network device can be connected through a wired or wireless manner, which is not limited in this regard.

[0103] The first network device can be a device such as the RAN in FIG. 1, and the second network device is a device with uplink transmission capability. For example, the second network device is an uplink transmission device, which has the capability of uplink reception (and can also have the capability of downlink transmission). When performing uplink data transmission, the terminal device sends uplink data to the uplink transmission device, and the uplink transmission device sends the uplink data to the first network device.

[0104] As described in the background, before the terminal device and the network device perform uplink data transmission, the terminal device needs to establish uplink synchronization with the network device. In the application scenario 200, the terminal device can directly establish uplink synchronization with the first network device, or can establish uplink synchronization with the first network device through the second network device, which is not limited in this regard. For ease of description, the following describes an example in which the terminal device and the network device establish uplink synchronization, and the network device is not limited to the first network device or the second network device.

[0105] For ease of description and understanding, the following briefly describes some technical terms involved in the present application.

[0106] 1. Four-step random access procedure

[0107] The terminal device and the network device perform a four-step information interaction (such as message 1 (Msg1), message 2 (Msg2), message 3 (Msg3), and message 4 (Msg4)) process, which can be referred to FIG. 3.

[0108] FIG. 3 is a schematic diagram of a four-step random access process 300. As shown in FIG. 3, the four-step random access process 300 includes:

[0109] Optionally, S301a, the network device sends random access configuration information (for example, carried in high layer signaling) (or a physical downlink control channel (PDCCH)) to the terminal device. Correspondingly, the terminal device receives the random access configuration information.

[0110] The terminal device determines the index of the preamble 1, the time-frequency resource, the power configuration, and the like according to the random access configuration information.

[0111] The determination of the preamble 1 is related to the SSB. For example, the network device sends a plurality of SSBs to the terminal device, each SSB corresponds to a beam direction, the terminal device measures the plurality of SSBs, determines an SSB with a signal receiving strength greater than a threshold value in the plurality of SSBs, and selects a PRACH resource from a plurality of PRACH resources associated with the SSB, and selects the preamble 1 from a plurality of preambles corresponding to the PRACH resource.

[0112] S301, the terminal device sends Msg1 to the network device, and the Msg1 includes the preamble 1. Correspondingly, the network device receives the Msg1.

[0113] Specifically, the terminal device determines the transmission beam direction of the preamble 1 through the beam direction corresponding to the SSB (which is the same beam direction), and the network device receives the preamble 1 in the beam direction corresponding to the SSB. Wherein, the preamble 1 is used to indicate that there is a random access request, and the network device estimates the transmission delay between the terminal device according to the preamble 1 to calibrate the uplink timing.

[0114] S302, the network device sends Msg2 (also known as random access response (RAR)) to the terminal device. Correspondingly, the terminal device receives the Msg2.

[0115] After detecting the preamble 1, the network device sends the Msg2 to the terminal device. The Msg2 can include the index of the preamble 1, the timing advance command, the uplink resource allocation, and the cell radio network temporary identifier and other information.

[0116] S303, the terminal device sends Msg3 to the network device. Correspondingly, the network device receives the Msg3.

[0117] After receiving the Msg2, the terminal device first adjusts the uplink timing according to the timing advance command, and sends the Msg3 on the allocated uplink resource according to the indication.

[0118] If multiple terminal devices select the preamble 1, a conflict will occur. For example, the preamble 1 sent by one of the multiple terminal devices is correctly received by the network device, and the network device sends the Msg2 to the terminal device. The multiple terminal devices can all receive the Msg2. The multiple terminal devices cannot determine which terminal device sends the preamble 1 received by the network device through the Msg2. At this time, these terminal devices can all receive the Msg2 and send the Msg3 respectively. Therefore, the Msg3 includes the unique identifier of the terminal device, which is used to solve the subsequent conflict.

[0119] S304, the network device sends Msg4 (which can also be a conflict resolution message) to the terminal device. Correspondingly, the terminal device receives Msg4.

[0120] The network device carries the unique identifier in Msg3 in Msg4 to specify the terminal device that has successfully accessed, and other terminal devices that have not successfully accessed will reinitiate random access.

[0121] 2. Two-step random access procedure

[0122] The two-step information interaction (such as Msg1 and Msg2) procedure between the terminal device and the network device can be seen from FIG. 4.

[0123] FIG. 4 is a schematic diagram of a two-step random access procedure 400. As shown in FIG. 4, the two-step random access procedure 400 includes:

[0124] Optionally, S401a, the network device sends random access configuration information to the terminal device. Correspondingly, the terminal device receives the random access configuration information.

[0125] The terminal device determines the index of the preamble 1, the time-frequency resource, and the power configuration, and the like according to the random access configuration information.

[0126] The determination of the preamble 1 is related to the SSB. For example, the network device sends a plurality of SSBs to the terminal device, each SSB corresponds to a beam direction, the terminal device measures the plurality of SSBs, determines an SSB with a signal reception strength greater than a threshold value in the plurality of SSBs, and selects a PRACH resource from a plurality of PRACH resources associated with the SSB, and selects a preamble 1 from a plurality of preambles corresponding to the PRACH resource.

[0127] S401, the terminal device sends Msg1 to the network device, and Msg1 includes the preamble 1 and data. Correspondingly, the network device receives Msg1.

[0128] The terminal device determines the transmission beam direction of the preamble 1 through the beam direction corresponding to the SSB (which can be the same beam direction), and the network device receives the preamble 1 in the beam direction corresponding to the SSB.

[0129] S402, the network device sends Msg2 to the terminal device. Correspondingly, the terminal device receives Msg2.

[0130] After detecting the preamble 1, the network device sends Msg2 to the terminal device. Msg2 includes the index of the preamble 1, a timing advance instruction, an uplink resource allocation, and a cell radio network temporary identifier, and the like.

[0131] In the four-step random access procedure and the two-step random access procedure described above, uplink synchronization between the terminal device and the network device can fail. For example, due to the fact that the distance between the terminal device and the network device is far or the beam direction for sending the preamble is not aligned, the network device can not receive the preamble 1 after the terminal device sends the preamble 1. At present, the terminal device reinitiates the random access procedure by increasing the sending power of the preamble 1 and sending the preamble 1 to the network device again, which can cause the terminal device to consume more power.

[0132] Therefore, the present application provides a random access method and a communication device, which can support the terminal device to reinitiate the random access procedure with lower power consumption.

[0133] Specifically, the network device configures an SSB group for each SSB, for example, the network device configures an SSB group i for SSB i, and the SSB group i includes one or more SSBs. When the terminal device determines that the sending of the preamble sent through the PRACH resource associated with SSB i fails, the terminal device reinitiates the random access procedure by sending the preamble again through the PRACH resource associated with a certain SSB (different from SSB i) in the SSB group i, which can support reducing the power consumption of the terminal device.

[0134] For the sake of understanding and description, the random access method of the embodiments of the present application is described below by taking the interaction between the terminal device and the network device as an example, but this should not constitute any limitation on the execution subject of the method. For example, the method executed by the device (such as the terminal device and / or the network device) can also be executed by the module (such as the circuit, chip or chip system, etc.) in the device, and can also be implemented by a logic node, a logic module or software that can realize all or part of the functions of the device, and this is not limited.

[0135] FIG. 5 is an interaction flow diagram of the random access method 500 of the embodiments of the present application. As shown in FIG. 5, the method 500 includes:

[0136] S501, the network device determines first information. The first information indicates that the first SSB group (the first SSB group can or can not include the first SSB) is associated with the first SSB (the association can also be replaced by correspondence or correlation, etc.).

[0137] In the embodiments of the present application, the SSB is also referred to as a synchronization signal (block). The SSB can include two parts, which are a synchronization signal (SS) and a physical broadcast channel (PBCH) block. The SS can include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). Therefore, it can also be considered that the SSB includes three parts, that is, the SSB includes the PSS, the SSS, and the PBCH, and this is not limited. As an example, the SSB can also be referred to as a "synchronization / physical sidelink broadcast channel (PSBCH) block" (SS / PSBCH block), which is not limited in the present application. In addition, the SSB is only an example, which can be used to refer to any downlink reference signal in a cellular network. Generally, the SSB can be configured according to a cell.

[0138] The first SSB group is associated with the first SSB, which can be understood as that there is an association relationship (the association relationship can also be replaced by a corresponding relationship or a correlation relationship, etc.) between the first SSB group and the first SSB. The association relationship is reflected between the SSBs in the first SSB group and the first SSB, for example, the SSBs in the first SSB group are determined according to the first SSB.

[0139] It should be noted that the SSB associated with the first SSB, such as the SSB determined according to the first SSB, can be regarded as an SSB group (that is, the first SSB group), but it is not limited to the division of "group", that is, the "first information indicates that the first SSB group is associated with the first SSB" in the present application can be replaced by "the first indication information indicates that one or more SSBs are associated with the first SSB".

[0140] It should be further noted that the network device can sort the SSBs in the first SSB group, for example, the network device configures an index for each SSB in the first SSB group, and sorts the SSBs in the first SSB group according to the order from low to high according to the index. Correspondingly, the terminal device can select the SSB according to the sorting of the SSBs in the first SSB group, for example, the terminal device first selects the SSB with the highest order in the first SSB group, and then selects the SSB with the lower order, which is not limited.

[0141] Optionally, the terminal device can also randomly select a certain SSB from the first SSB group, which is not limited.

[0142] In one example, the SSBs in the first SSB group correspond to beam directions that are related to the beam direction corresponding to the first SSB. For example, the SSBs in the first SSB group correspond to beam directions that are deviated from the beam direction corresponding to the first SSB by a certain angle, e.g., 3°.

[0143] In one example, the SSBs in the first SSB group correspond to beam directions that are related to the beam direction corresponding to the first SSB. For example, the SSBs in the first SSB group correspond to beam directions that are deviated from the beam direction corresponding to the first SSB by a certain angle, e.g., 3°.

[0144] In one example, the SSBs in the first SSB group correspond to path losses that are related to the path loss corresponding to the first SSB. For example, the SSBs in the first SSB group correspond to path losses that are deviated from the path loss corresponding to the first SSB by a certain value, e.g., 2 dB.

[0145] In one example, the SSBs in the first SSB group correspond to path losses that are related to the path loss corresponding to the first SSB. For example, the SSBs in the first SSB group correspond to path losses that are deviated from the path loss corresponding to the first SSB by a certain value, e.g., 2 dB.

[0146] In one example, the SSBs in the first SSB group correspond to path losses that are related to the path loss corresponding to the first SSB. For example, the SSBs in the first SSB group correspond to path losses that are deviated from the path loss corresponding to the first SSB by a certain value, e.g., 2 dB.

[0147] In one example, the SSBs in the first SSB group correspond to path losses that are related to the path loss corresponding to the first SSB. For example, the SSBs in the first SSB group correspond to path losses that are deviated from the path loss corresponding to the first SSB by a certain value, e.g., 2 dB.

[0148] Table 1

[0149] As shown in Table 1:

[0150] The identification information 1 identifies the SSB 1, the group identification information 1 identifies the SSB group 1, and the SSB 1 is associated with the SSB group 1.

[0151] The identification information 2 identifies the SSB 2, the group identification information 2 identifies the SSB group 2, and the SSB 2 is associated with the SSB group 2.

[0152] …;

[0153] The identification information n identifies the SSB n, the group identification information n identifies the SSB group n, and the SSB n is associated with the SSB group n.

[0154] Wherein, "…" represents other SSBs and SSB groups not mentioned.

[0155] The network device can indicate the SSB group associated with each SSB to the terminal device through the content and form shown in Table 1.

[0156] The embodiments of the present application support configuring the SSBs included in each SSB group in a predefined manner, and also support configuring the SSBs included in each SSB group in an indicated manner, for example, the network device indicates the SSBs included in each SSB group to the terminal device, which is not limited.

[0157] In one possible embodiment, the first information includes identification information of the first SSB and group identification information of the first SSB group. In this way, the terminal device can determine that the first SSB is associated with the first SSB group according to the first information.

[0158] Each SSB is associated with one or more random access resources, and each random access resource is associated with one or more preambles. When the terminal device determines a certain random access resource associated with a certain SSB, it can select one preamble from the one or more preambles associated with the random access resource for transmission. Wherein, the random access resource can also be replaced by PRACH resource or RACH resource, etc., which is not limited. Wherein, the random access resource is used for preamble transmission.

[0159] In the embodiments of the present application, the configuration parameters of the random access resources associated with the SSBs other than the first SSB (or different from the first SSB) in the first SSB group can be the same or different, which is not limited.

[0160] In one possible embodiment, the configuration parameters of the random access resources associated with the SSBs other than the first SSB in the first SSB are different from the configuration parameters of the random access resources associated with the first SSB.

[0161] For example, the first SSB group includes the first SSB, and the configuration parameters of the random access resources associated with the SSBs other than the first SSB in the first SSB are different from the configuration parameters of the random access resources associated with the first SSB.

[0162] For another example, the first SSB does not include the first SSB, and the configuration parameters of the random access resources associated with all SSBs in the first SSB are different from the configuration parameters of the random access resources associated with the first SSB.

[0163] When the configuration parameters of the random access resource associated with the first SSB are different from the configuration parameters of the random access resource associated with the SSB other than the first SSB, it is beneficial to reduce the resource occupation of the preamble. For example, the random access resource associated with the first SSB is used for the terminal device to send a preamble to the first network device, and the random access resource associated with the second SSB is used for the terminal device to send a preamble to the second network device. Since the terminal device is closer to the second network device and farther from the first network device, the terminal device does not need to occupy more time-frequency resources to send a preamble to the second network device, and the terminal device needs to occupy more time-frequency resources to send a preamble to the first network device. When the terminal device sends a preamble to the second network device through the random access resource associated with the second SSB, the terminal device does not need to occupy more time-frequency resources.

[0164] In the embodiments of the present application, the configuration parameters of the random access resource can include at least one of the following:

[0165] related parameters of the preamble format; for example, the length of the generated sequence of the preamble, the size of the time domain resource occupied by the preamble, the size of the frequency domain resource, the number of repetitions of the preamble, the length of the cyclic prefix of the preamble, the subcarrier spacing of the preamble;

[0166] related parameters of the path loss; for example, the sequence number of the reference signal for measuring the path loss, the adjustment amount of the path loss measurement value;

[0167] the received target power (preambleReceivedTargetPower);

[0168] the maximum number of retransmissions (preambleTransMax);

[0169] the power ramping step (powerRampingStep);

[0170] related parameters of the association mode (ssb-perRACH-Occasion) of the random access resource and the SSB; for example, the number of corresponding SSBs on each RACH resource, or the number of RACH resources corresponding to each SSB

[0171] a related parameter of the preamble format of the random access resource associated with the first SSB; for example, the first SSB is associated with a long preamble, and the second SSB is associated with a short preamble.

[0172] a related parameter of the number of random access resources; for example, the number of frequency domain multiplexing of RACH resources.

[0173] Taking the preamble format as an example:

[0174] The preamble format of the random access resource associated with the first SSB is a long preamble, and the preamble format of the random access resource associated with the second SSB is a short preamble.

[0175] Taking the path loss as an example:

[0176] The value of the path loss of the random access resource associated with the first SSB is value 1, and the value of the path loss of the random access resource associated with the second SSB is value 2. The difference between value 2 and value 1 is a threshold.

[0177] Taking the received target power as an example:

[0178] For example, the received target power of the random access resource associated with the first SSB is greater than the received target power of the random access resource associated with the second SSB.

[0179] Taking the maximum retransmission number as an example:

[0180] For example, the maximum retransmission number of the random access resource associated with the first SSB is greater than the maximum retransmission number of the random access resource associated with the second SSB.

[0181] Taking the power boosting step as an example:

[0182] The power boosting step of the random access resource associated with the first SSB is greater than the power boosting step of the random access resource associated with the second SSB.

[0183] Taking the power boosting step as an example:

[0184] The power boosting step of the random access resource associated with the first SSB is greater than the power boosting step of the random access resource associated with the second SSB.

[0185] Taking the number of SSBs associated with one random access resource as an example:

[0186] For example, the number of SSBs associated with each random access resource of the first SSB association is less than the number of SSBs associated with each random access resource of the second SSB association.

[0187] For example, the B-preamble message power offset of the first SSB association is different from the B-preamble message power offset of the second SSB association.

[0188] For example, the number of random access resources associated with the first SSB association is different from the number of random access resources associated with the second SSB association.

[0189] For example, the number of random access resources associated with the first SSB association is different from the number of random access resources associated with the second SSB association.

[0190] For example, the number of random access resources associated with the first SSB association is different from the number of random access resources associated with the second SSB association.

[0191] In one possible embodiment, the first SSB group includes SSBs of a first type.

[0192] Optionally, the first SSB group further includes SSBs of a second type.

[0193] In the embodiments of the present application, the first type of SSBs is different from the second type of SSBs, and the difference between the first type of SSBs and the second type of SSBs includes but is not limited to that the time-frequency resources occupied by the first type of SSBs are less than the time-frequency resources occupied by the second type of SSBs, or the transmission period of the first type of SSBs is greater than the transmission period of the second type of SSBs, or the transmission bandwidth of the first type of SSBs is less than the transmission bandwidth of the second type of SSBs, and the like.

[0194] In the embodiments of the present application, the first type of SSBs can be virtual SSBs or non-real SSBs, and the second type of SSBs can be real SSBs or actual SSBs.

[0195] In the embodiments of the present application, the first type of SSBs is determined according to a third SSB, and the third SSB satisfies any one of the following conditions:

[0196] The third SSB includes part or all of the SSBs of the second type of SSBs,

[0197] The third SSB includes a fourth SSB, and the fourth SSB does not belong to the first SSB group, that is, the third SSB includes SSBs that do not belong to the first SSB group, or the third SSB includes SSBs that belong to other SSB groups (the SSBs can be first type SSBs in other SSB groups or second type SSBs in other SSB groups, which are not limited), or,

[0198] The third SSB includes part or all of the SSBs in the second type of SSBs and the fourth SSB.

[0199] For example, the third SSB includes part or all of the SSBs in the second type of SSBs, and the first type of SSB is a SSB determined according to part or all of the SSBs in the second type of SSBs.

[0200] For example, the third SSB includes the fourth SSB, and the first type of SSB is a SSB determined according to the SSBs in the non-first SSB group.

[0201] For example, the third SSB includes part or all of the SSBs in the second type of SSBs and the fourth SSB, and the first type of SSB is a SSB determined according to part or all of the SSBs in the second type of SSBs and the SSBs in the non-first SSB group.

[0202] For example, the third SSB includes all of the SSBs in the second type of SSBs, which can be seen from Table 2.

[0203] Table 2

[0204] As shown in Table 2, the first type of SSB in the first SSB group includes SSB11, SSB12 and SSB13, and the second type of SSB includes SSB21, SSB22, SSB23, SSB24 and SSB25. Among them, SSB11 is a SSB determined according to SSB21, SSB22, SSB23, SSB24 and SSB25; SSB12 is a SSB determined according to SSB21, SSB22 and SSB23; and SSB13 is a SSB determined according to SSB23, SSB24 and SSB25.

[0205] By introducing the first type of SSB, the terminal device can send a preamble in the beam direction associated with the first type of SSB, and is no longer limited to the beam direction corresponding to the second type of SSB, thereby supporting improving the success rate of the random access procedure re-initiated by the terminal device. For example, the beam direction associated with the first type of SSB can cover the direction not covered by the beam direction associated with the SSB in the current cell.

[0206] In one possible embodiment, the first type of SSB is a SSB determined according to the third SSB, including at least one of the following:

[0207] The beam direction corresponding to the first type of SSB is determined according to the beam direction corresponding to the third SSB; or,

[0208] The path loss corresponding to the first type of SSB is determined according to the path loss corresponding to the third SSB.

[0209] In this way, the first type of SSB can be formed in the above two ways.

[0210] For example, the third SSB includes all SSBs in the second type of SSB, and Table 3 can be referred to.

[0211] Table 3

[0212] As shown in Table 3, the second type of SSB in the first SSB group includes SSB1, SSB2, and SSB3, the beam direction corresponding to SSB1 is angle 1, the beam direction corresponding to SSB2 is angle 2, and the beam direction corresponding to SSB3 is angle 3, the first type of SSB in the first SSB group includes SSB4, the beam direction corresponding to SSB4 is angle 4, and angle 4 = (angle 1 + angle 2 + angle 3) / 3. In this way, a new beam direction can be constructed.

[0213] Optionally, the first type of SSB can also be determined according to the third SSB and an offset value, which is not limited herein. For example, angle 4 = (angle 1 + angle 2 + angle 3) / 3 + offset.

[0214] In one possible embodiment, the first type of SSB is an SSB without downlink time-frequency resource configuration, and the second type of SSB is an SSB with downlink time-frequency resource configuration.

[0215] When the first type of SSB is an SSB without downlink time-frequency resource configuration, the network device does not need to send a downlink signal through the first type of SSB, which will not cause interference to the adjacent area and will not occupy more time-frequency resources. In addition, the network device does not need to adjust the existing time-frequency resource configuration of the SSB.

[0216] In one possible embodiment, the configuration parameters of the random access resource associated with the first type of SSB are different from the configuration parameters of the random access resource associated with the second type of SSB.

[0217] In this way, the configuration parameters of the random access resource can be configured for different types of SSBs respectively, which can support the terminal device to select different configuration parameters of the random access resource. At the same time, this can enhance the flexibility of the configuration of the random access resource.

[0218] In one possible embodiment, the second SSB is the first type of SSB. In this way, the network device does not need to configure downlink time-frequency resources for the second SSB.

[0219] ​S502, the network device sends first information to the terminal device. Correspondingly, the terminal device receives the first information.

[0220] The terminal device determines the association between the first SSB and the first SSB group according to the first information. Correspondingly, the terminal device determines a second SSB in the first SSB group according to the first information, and the second SSB is any one SSB or multiple SSBs in the first SSB group, which is not limited.

[0221] S503, when the terminal device determines that the first preamble sent on the first random access resource associated with the first SSB fails, the terminal device sends a second preamble through a second random access resource.

[0222] In the embodiments of the present application, the preamble can also be understood as a preamble signal or an uplink preamble signal, etc., which can be used in the random access process of the terminal device.

[0223] For example, after the terminal device sends the first preamble through the first random access resource associated with the first SSB, the terminal device does not receive the response information corresponding to the first preamble, and the terminal device determines that the first preamble fails.

[0224] For another example, after the terminal device sends the first preamble through the first random access resource associated with the first SSB, the terminal device determines that the uplink random access process corresponding to the first preamble fails, and the terminal device can determine that the first preamble fails.

[0225] In summary, when the terminal device determines that the first preamble fails, the terminal device selects a second SSB in the first SSB group according to the first information, and selects a second random access resource associated with the second SSB, and sends a second preamble to the network device (which can be the first network device or the second network device, which is not limited) through the second random access resource.

[0226] Through the above scheme, when the terminal device determines that the first preamble fails, the terminal device selects a second SSB from the first SSB group associated with the first SSB, and sends a second preamble through a second random access resource associated with the second SSB. In this way, the terminal device can reselect an SSB and send a preamble through the random access resource associated with the SSB, and then it is not necessary to directly reinitiate the random access process by increasing the transmission power of the preamble, which can support reducing the power consumption of the terminal device. In addition, since the terminal device reselects an SSB associated with a random access resource from the SSB group configured by the network device to reinitiate the random access process, this can support improving the success probability of the terminal device reinitiating the random access process.

[0227] In a possible implementation, the second preamble is determined according to only a message 3 size. In this way, the selection rule of the second preamble can be simplified, so that the terminal device can more easily determine the second preamble.

[0228] In a possible implementation, the second preamble is determined according to only a message 3 size, including:

[0229] The message 3 size is less than or equal to a threshold, the second preamble belongs to a preamble group A, or

[0230] The message 3 size is greater than or equal to the threshold, and the second preamble belongs to a preamble group B.

[0231] For example, when the terminal device determines that the message 3 size is less than or equal to the threshold, the terminal device can select the second preamble from the preamble group A. When the terminal device determines that the message 3 size is greater than or equal to the threshold, the terminal device can select the second preamble from the preamble group B.

[0232] Optionally, the terminal device can also determine the second preamble in combination with a path loss corresponding to the second SSB, which is not limited.

[0233] In a possible implementation, the transmission power of the second preamble is greater than the transmission power of the first preamble. In this way, this can support improving the success probability of the random access procedure reinitiated by the terminal device.

[0234] Currently, the terminal device determines the random access resource for transmitting the preamble through the SSB defined in the existing standard, however, the SSB defined in the existing standard can not support the uplink synchronization between the terminal device and the network device, for example, the beam direction corresponding to the SSB defined in the existing standard can not cover all directions between the terminal device and the network device, which can cause the uplink synchronization between the terminal device and the network device to fail. In view of this, the present application provides a random access method and a communication apparatus, which can support improving the success probability of the uplink synchronization between the terminal device and the network device. Please refer to FIG. 6.

[0235] FIG. 6 is an interaction flow diagram of a random access method 600 according to an embodiment of the present application. As shown in FIG. 6, the method 600 includes:

[0236] S601, the network device determines second information.

[0237] The second information includes configuration information of the first type of SSBs (e.g., including related parameters of beam directions of the first type of SSBs and related parameters of path loss measurements of the first type of SSBs, etc.), the first type of SSBs being SSBs determined according to fifth SSBs, the fifth SSBs including part or all of the second type of SSBs, the first type being different from the second type.

[0238] For example, the network device divides the SSBs into two types of SSBs, one type being the first type of SSBs and the other type being the second type of SSBs. The description of the first type of SSBs and the second type of SSBs can be referred to the description of FIG. 5, and will not be repeated here.

[0239] The first type of SSBs is determined according to the second type of SSBs. For example, the first type of SSBs is determined according to fifth SSBs, the fifth SSBs including part or all of the second type of SSBs, which can be referred to Table 4.

[0240] Table 4

[0241] As shown in Table 4, the first type of SSBs includes SSB31, SSB32 and SSB33, and the second type of SSBs includes SSB41, SSB42, SSB43, SSB44, SSB45, SSB46 and SSB47. For different first type of SSBs, the SSBs included in the fifth SSBs can be different. For example:

[0242] SSB31 is a SSB determined according to SSB41, SSB42, SSB43, SSB44 and SSB45;

[0243] SSB33 is a SSB determined according to SSB41, SSB42, SSB43 and SSB46;

[0244] SSB33 is a SSB determined according to SSB43, SSB44, SSB45 and SSB47.

[0245] In one possible embodiment, the first type of SSBs is determined according to the fifth SSBs, which can include at least one of the following:

[0246] The beam direction corresponding to the first type of SSBs is determined according to the beam direction corresponding to the fifth SSBs; or,

[0247] The path loss corresponding to the first type of SSBs is determined according to the path loss corresponding to the fifth SSBs.

[0248] The description about the above can refer to the description of Table 3, and will not be repeated here.

[0249] In this way, the network device can determine a new SSB according to the SSB defined in the existing standard, and the beam direction corresponding to the new SSB can cover a direction that is not covered by the beam direction corresponding to the SSB defined in the existing standard.

[0250] S602, the network device sends second information to the terminal device. Correspondingly, the terminal device receives the second information.

[0251] S603, the terminal device sends a preamble through a random access resource associated with a second SSB, and the second SSB belongs to a first type of SSB.

[0252] The terminal device can determine the second SSB according to historical information. For example, the terminal device successfully initiates a random access procedure through a random access resource associated with a certain SSB before, and when the terminal device wants to continue to initiate a random access procedure, the terminal device determines that the SSB does not belong to a second type of SSB currently configured, and the terminal device can send a preamble through a random access resource associated with a first type of SSB. Or, when the terminal device determines that the beam direction suitable for uplink communication matches the beam direction associated with the first type of SSB, the terminal device sends a preamble through a random access resource associated with the first type of SSB, thereby improving the success rate of the terminal device initiating a random access procedure.

[0253] In summary, the terminal device can determine a second SSB according to the second information, and send a preamble through a random access resource associated with the second SSB. The process of the terminal device determining the second SSB is not limited in the embodiments of the present application.

[0254] Since the second SSB is determined according to the second type of SSB, the beam direction associated with the second SSB can be aimed at the network device, and when the terminal device sends a preamble through a random access resource associated with the second SSB, the network device can receive the preamble, thereby facilitating the completion of the random access procedure between the terminal device and the network device.

[0255] In one possible embodiment, the first type of SSB is an SSB without downlink time-frequency resource configuration, and the second type of SSB is an SSB with downlink time-frequency resource configuration.

[0256] When the first type of SSB is an SSB without downlink time-frequency resource configuration, the network device does not need to send a downlink signal through the first type of SSB, which will not cause interference to the adjacent area and will not occupy more time-frequency resources. In addition, the network device does not need to adjust the existing configuration of the time-frequency resources of the SSB.

[0257] In one possible implementation, the configuration parameters of the random access resources associated with the first type of SSB are different from the configuration parameters of the random access resources associated with the second type of SSB. In this way, the configuration parameters of the random access resources can be configured for different types of SSBs respectively, which can support the terminal device to select different configuration parameters of the random access resources. Meanwhile, this can enhance the flexibility of the configuration of the random access resources.

[0258] The description of the configuration parameters of the random access resources can refer to the description of FIG. 5, and will not be repeated here.

[0259] To implement the functions in the methods provided in the present application, the terminal device and the network device can each include a hardware structure and / or a software module to implement the above functions in the form of hardware structure, software module, or hardware structure plus software module. Whether a certain function in the above functions is implemented in the form of hardware structure, software module, or hardware structure plus software module depends on the specific application and design constraints of the technical solutions.

[0260] FIG. 7 is a schematic block diagram of a communication apparatus 700 according to an embodiment of the present application. The communication apparatus 700 includes processing circuitry 710 and transceiver circuitry 720, which can be connected or coupled with each other, such as through a bus 730. The communication apparatus 700 can be a terminal device or a network device.

[0261] Optionally, the communication apparatus 700 can further include a memory 740. The memory 740 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a compact disc read-only memory (CD-ROM). The memory 740 is any other medium capable of carrying or storing desired program code in the form of instructions or data structures and capable of being accessed by a computer, but is not limited thereto. The memory in the embodiments of the present application can also be a circuit or any other device capable of realizing a storage function, used for storing computer programs or instructions, and / or data.

[0262] The processing circuit 710 can be all or part of one or more processors, or be one or more processors. The processor can be a central processing unit (CPU). In the case of the processing circuit 710 being a CPU, the CPU can be a single core processor, or a multi-core processor. The processing circuit 710 can be a signal processor, a chip, or other integrated circuit that can implement the method of the present application, or part of the foregoing processor, chip or integrated circuit for processing functions. In addition, the transceiver circuit 720 can also be a transceiver, or an input / output interface, an input / output interface for input or output of signals or data, and can also be referred to as an input / output circuit.

[0263] When the communication apparatus 700 is a terminal device, the processing circuit 710 is configured to perform the following operations: receiving first information; transmitting a second preamble through a second random access resource when a first preamble transmitted on a first random access resource associated with the first SSB is determined to have failed.

[0264] When the communication apparatus 700 is a network device, the processing circuit 710 is configured to perform the following operations: determining first information; transmitting the first information, etc.

[0265] When the communication apparatus 700 is a terminal device or a network device, it will be responsible for performing the methods or steps related to the terminal device or the network device in the foregoing method embodiments.

[0266] When the communication apparatus 700 is a terminal device or a network device, the transceiver circuit 720 can be a transceiver.

[0267] When the communication apparatus 700 is a chip for a terminal device or a network device, the transceiver circuit 720 can be an input / output circuit.

[0268] The above description is only an exemplary description. The specific content can refer to the content shown in the foregoing method embodiments.

[0269] The implementation of each operation in FIG. 7 can also correspond to the description of the corresponding method embodiments shown in FIGS. 5-6.

[0270] FIG. 8 is a schematic block diagram of a communication apparatus 800 according to an embodiment of the present application. The communication apparatus 800 can be a terminal device or a network device, and is configured to implement the method related in the foregoing embodiments.

[0271] The communication apparatus 800 comprises a transceiver 810 and a processing unit 820. The transceiver 810 can comprise a transmitter and a receiver. The transmitter is configured to perform the transmitting actions of the communication apparatus, and the receiver is configured to perform the receiving actions of the communication apparatus. For the convenience of description, the transmitter and the receiver are combined into one transceiver in the embodiments of the present application. The combination is described here, and will not be repeated hereinafter.

[0272] When the communication apparatus 800 is a terminal device, the transceiver 810 is configured to receive the first information and transmit the second preamble, and the processing unit 820 is configured to determine that the first preamble transmitted on the first SSB-associated first random access resource fails, and the like.

[0273] When the communication apparatus 800 is a network device, the transceiver 810 is configured to transmit the first information, and the processing unit 820 is configured to determine the first information, and the like.

[0274] When the communication apparatus 800 is a terminal device or a network device, the communication apparatus 800 is responsible for performing one or more of the methods or steps related to the terminal device or the network device in the foregoing method embodiments.

[0275] Optionally, the communication apparatus 800 further comprises a storage unit 830 configured to store programs or codes for performing the foregoing methods.

[0276] The transceiver in FIG. 8 can correspond to the transceiver circuit in FIG. 7, and the processing unit in FIG. 8 can correspond to the processing circuit in FIG. 7.

[0277] The apparatus embodiments shown in FIGS. 7 and 8 are used to implement the contents described in FIGS. 5 to 6. The specific execution steps and methods of the apparatus shown in FIGS. 7 and 8 can refer to the contents described in the foregoing method embodiments.

[0278] The present application also provides a chip comprising a processor, which is configured to call and run instructions stored in a memory, so that a communication device installed with the chip performs the methods in each of the examples described above. The memory can be integrated into the chip, or located outside the chip.

[0279] The present application also provides another chip comprising an input interface, an output interface, and a processing circuit. The input interface, the output interface, and the processing circuit are connected through internal connection paths. The processing circuit is configured to execute codes in a memory, and when the codes are executed, the processing circuit is configured to perform the methods in each of the examples described above.

[0280] Optionally, the chip further comprises a memory configured to store computer programs or codes. The input interface and the output interface can be independent of each other, or can be integrated into an input / output interface.

[0281] The processing circuitry can be all or a part of one or more processors, or one or more processors.

[0282] The present application also provides a processor, which is used to be coupled with a memory, and is used to execute the method and functions of any of the above embodiments related to network devices or terminal devices.

[0283] In another embodiment of the present application, a computer program product containing instructions is provided, when the computer program product is run on a computer, the method of the above embodiments is implemented.

[0284] The present application also provides a computer program, when the computer program is run on a computer, the method of the above embodiments is implemented.

[0285] In another embodiment of the present application, a computer readable storage medium is provided, the computer readable storage medium stores a computer program, when the computer program is executed by a computer, the method of the above embodiments is implemented.

[0286] It should be understood that, in the embodiments of the present application, the processor can be a central processing unit (CPU), and the processor can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic components, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0287] In addition, the processor can include one or a combination of a central processing unit (CPU), a baseband processor, a digital signal processor (DSP), a microprocessor unit (MPU), a microcontroller unit (MCU), a graphics processing unit (GPU), a field programmable gate array (FPGA), an artificial intelligence processor (AI processor), or a neural network processor (NPU).

[0288] It should also be appreciated that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example, but not limitation, many forms of random access memory (RAM) are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the system and method described herein is intended to include, but not be limited to, these and any other suitable types of memory.

[0289] The above-described embodiments can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, the above-described embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present application are wholly or partially generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable apparatus. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center through a wired 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. containing one or more available medium collections. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state disk.

[0290] It should be understood that the size of the sequence number of each process described above in various embodiments of the present application does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0291] Those skilled in the art can appreciate that the units and algorithm steps of the examples 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 depends on the specific application and design constraints of the technical solutions. Those skilled in the art 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 present application. Those skilled in the art can clearly understand that, for the convenience and brevity of 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. In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0292] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. can be located in one place or can be distributed to multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiment according to actual needs. In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present alone, or two or more units can be integrated in one unit. When the above functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts that make contributions to the prior art or parts of the technical solutions can be embodied in the form of software products, which are stored in a storage medium and include a number of instructions for making a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in each embodiment of the present application. The foregoing storage medium includes: U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk, and various program code storage media.

[0293] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on specific applications and design constraints of the technical solutions. Those skilled in the art 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 present application.

Claims

1. A method of random access, characterized by, Comprising: receiving first information, the first information indicating that a first synchronization signal block (SSB) group is associated with a first SSB, the first SSB group comprising one or more SSBs; when a first preamble sent on a first random access resource associated with the first SSB is determined to be a failed preamble, sending a second preamble through a second random access resource, the second random access resource being associated with a second SSB, the first SSB group comprising the second SSB, the first SSB being different from the second SSB.

2. The method of claim 1, wherein, Configuration parameters of a random access resource associated with an SSB other than the first SSB in the first SSB group are different from configuration parameters of a random access resource associated with the first SSB.

3. The method according to claim 1 or 2, characterized in that, The first SSB group comprises SSBs of a first type, the SSBs of the first type being SSBs determined according to a third SSB; The third SSB satisfies any one of the following: The third SSB comprises part or all of SSBs of a second type, the second type being different from the first type, The third SSB comprises a fourth SSB, the fourth SSB not belonging to the first SSB group, or The third SSB comprises part or all of SSBs of the second type and the fourth SSB.

4. The method of claim 3, wherein, The SSBs of the first type are SSBs determined according to a third SSB, comprising at least one of the following: A beam direction corresponding to the SSBs of the first type is determined according to a beam direction corresponding to the third SSB; or A path loss corresponding to the SSBs of the first type is determined according to a path loss corresponding to the third SSB.

5. The method according to claim 3 or 4, characterized in that, The SSBs of the first type are SSBs without downlink time-frequency resource configuration, and the SSBs of the second type are SSBs with downlink time-frequency resource configuration.

6. The method according to any one of claims 3 to 5, characterized in that, Configuration parameters of a random access resource associated with the SSBs of the first type are different from configuration parameters of a random access resource associated with the SSBs of the second type.

7. The method according to any one of claims 3 to 6, characterized in that, The second SSB is the SSB of the first type.

8. The method according to any one of claims 1 to 7, characterized in that, The second preamble is determined only according to a message 3 payload.

9. The method of claim 8, wherein, The second preamble is determined only according to a message 3 payload, comprising: The message 3 payload is less than or equal to a threshold value, and the second preamble belongs to a preamble group A, or The message 3 payload is greater than or equal to a threshold value, and the second preamble belongs to a preamble group B.

10. The method according to any one of claims 1 to 9, characterized in that, The transmission power of the first preamble is less than the transmission power of the second preamble.

11. The method according to any one of claims 2 to 10, characterized in that, The configuration parameters of the random access resource comprise at least one of the following: preamble format, path loss, reception target power, maximum retransmission number, power step-up step, association manner of random access resource and SSB, B group preamble message selection, or number of random access resources.

12. A method of random access, characterized by, Comprising: determining first information, the first information indicating that a first synchronization signal block (SSB) group is associated with a first SSB, the first SSB group comprising one or more SSBs, a first preamble sent on a first random access resource associated with the first SSB being a failed preamble; transmitting the first information, the first information being used to determine a second random access resource, the second random access resource being used to transmit a second preamble, the second random access resource being associated with a second SSB, the first SSB group comprising the second SSB, the first SSB being different from the second SSB.

13. The method of claim 12, wherein, configuration parameters of a random access resource associated with an SSB other than the first SSB in the first SSB group are different from configuration parameters of a random access resource associated with the first SSB.

14. The method according to claim 12 or 13, characterized in that, the first SSB group comprises a first type of SSB, the first type of SSB being an SSB determined according to a third SSB; the third SSB satisfies any one of the following conditions: the third SSB comprises part or all of a second type of SSB, the second type being different from the first type, the third SSB comprises a fourth SSB, the fourth SSB not belonging to the first SSB group, or the third SSB comprises part or all of the second type of SSB and further comprises the fourth SSB.

15. The method of claim 14, wherein, the first type of SSB being an SSB determined according to a third SSB comprises at least one of the following conditions: a beam direction corresponding to the first type of SSB is determined according to a beam direction corresponding to the third SSB; or a path loss corresponding to the first type of SSB is determined according to a path loss corresponding to the third SSB.

16. The method according to claim 14 or 15, characterized in that the first type of SSB is an SSB without downlink time-frequency resource configuration, and the second type of SSB is an SSB with downlink time-frequency resource configuration.

17. The method according to any one of claims 14 to 16, characterized in that, configuration parameters of a random access resource associated with the first type of SSB are different from configuration parameters of a random access resource associated with the second type of SSB.

18. The method according to any one of claims 14 to 17, characterized in that, the second SSB is the first type of SSB.

19. The method according to any one of claims 12 to 18, characterized in that, the second preamble is determined only according to a message 3 payload.

20. The method of claim 19, wherein, the second preamble is determined only according to a message 3 payload, comprising: the message 3 payload is less than or equal to a threshold value, the second preamble belonging to a preamble group A, or the message 3 payload is greater than or equal to a threshold value, the second preamble belonging to a preamble group B.

21. The method according to any one of claims 12 to 20, characterized in that, a transmission power of the first preamble is less than a transmission power of the second preamble.

22. The method of any one of claims 13-21, wherein, the configuration parameters of the random access resource comprise at least one of the following: preamble format, path loss, reception target power, maximum retransmission number, power boosting step, association manner between random access resource and SSB, B group preamble message selection, or number of random access resources.

23. A method of random access, characterized by comprising: receiving second information, the second information comprising configuration information of a first type of synchronization signal block (SSB), the first type of SSB being an SSB determined according to a fifth SSB, the fifth SSB comprising part or all of a second type of SSB, the first type being different from the second type; transmitting a preamble through a random access resource associated with a second SSB, the second SSB belonging to the first type of SSB.

24. The method of claim 23, wherein, the first type of SSB being an SSB determined according to a fifth SSB comprises at least one of the following conditions: The beam direction corresponding to the first type of SSB is determined according to the beam direction corresponding to the fifth SSB. The path loss corresponding to the first type of SSB is determined according to the path loss corresponding to the fifth SSB.

25. The method of claim 23 or 24, wherein, The first type of SSB is an SSB without downlink time-frequency resource configuration, and the second type of SSB is an SSB with downlink time-frequency resource configuration.

26. The method of any one of claims 23-25, wherein, The configuration parameters of the random access resource associated with the first type of SSB are different from the configuration parameters of the random access resource associated with the second type of SSB.

27. A method of random access, characterized by The second information includes configuration information of a first type of synchronization signal block (SSB), the first type of SSB is an SSB determined according to a fifth SSB, the fifth SSB includes part or all of the second type of SSB, and the first type is different from the second type. The second information is transmitted. The first type of SSB is an SSB determined according to a fifth SSB, including at least one of the following:

28. The method of claim 27, wherein, The beam direction corresponding to the first type of SSB is determined according to the beam direction corresponding to the fifth SSB. The path loss corresponding to the first type of SSB is determined according to the path loss corresponding to the fifth SSB. The first type of SSB is an SSB without downlink time-frequency resource configuration, and the second type of SSB is an SSB with downlink time-frequency resource configuration.

29. The method of claim 27 or 28, wherein, The configuration parameters of the random access resource associated with the first type of SSB are different from the configuration parameters of the random access resource associated with the second type of SSB.

30. The method of any one of claims 27-29, wherein, The processor is configured to execute the computer program or the instruction, or the logic circuit, so that the communication device executes the method in any one of claims 1-30.

31. A communications device, characterized by The communication device further includes a memory for storing the computer program or the instruction.

32. The communication apparatus of claim 31, wherein The communication device further includes a communication interface for inputting and / or outputting signals.

33. The communication apparatus according to claim 31 or 32, wherein, The logic circuit and the input / output interface are used to input and / or output signals, and the logic circuit is used to execute the method in any one of claims 1-30.

34. A communications device, characterized by The computer readable storage medium stores computer programs or instructions, and when the computer programs or the instructions run on the computer, the method in any one of claims 1-30 is executed.

35. A computer readable storage medium, characterized in that, The instructions are executed on the computer, and the method in any one of claims 1-30 is executed.

36. A computer program product, characterised in that, The processor is configured to execute the computer program or the instruction in the memory, so that the chip system implements the method in any one of claims 1-30.

37. A chip system, characterized by ​ ​

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