Random access method, terminal equipment and network equipment

Abstract

The present application discloses a random access method, terminal device, and network device, belonging to the field of communications, for implementing random access in a cell-free communication system. The method comprises: sending first information for random access, wherein a preamble carried by the first information is determined based on information of multiple target signals; receiving second information sent by the network device, wherein the second information is a random access response to the first information; sending third information based on the second information; and receiving fourth information sent by the network device, wherein the fourth information is a response to the third information.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of communications, and in particular to a random access method, terminal equipment, and network equipment. Background Art

[0002] During a random access channel (RACH), such as a four-step RACH, the terminal needs to determine the timing of the physical random access channel (PRACH) and send MSG1 in the four-step RACH process based on an SSB index obtained when the measured reference signal received power (RSRP) of the serving cell synchronization signal (SS) is greater than the RSRP threshold (e.g., rsrp-ThreholdSSB) of the synchronization signal block (SSB) and PBCH block (SSB). The base station determines the corresponding SSB index based on the relevant information of the received MSG1, and can then send MSG 2 in the four-step RACH process based on the determined SSB index.

[0003] A cell-free communication system dispenses with the concept of cells. Instead, the system consists of multiple access points (APs). User equipment (UE) communicates with one or more nearby APs. As a UE moves between APs, its serving AP changes. There are no cell identifiers (IDs), and inter-cell handovers or cell reselection are not possible. Because all N nearby APs serve as the UE's serving APs, a UE is immune to interference from neighboring APs.

[0004] In this case, the above RACH procedure is no longer applicable to the Cell-free network. Summary of the Invention

[0005] The embodiments of the present application provide a random access method, terminal device, and network device, which can implement random access for a cell-free communication system.

[0006] In a first aspect, a method for random access is provided, which is executed by a terminal device, and the method includes: sending first information for random access, wherein a preamble carried by the first information is determined based on information of multiple target signals; receiving second information sent by a network device, wherein the second information is a random access response to the first information; sending third information based on the second information; and receiving fourth information sent by the network device, wherein the fourth information is response information to the third information.

[0007] In a second aspect, a method for random access is provided, which is executed by a network device, and the method includes: receiving first information for random access sent by a terminal device, wherein a preamble carried by the first information is determined based on information of multiple target signals; sending second information to the terminal device, wherein the second information is a random access response to the first information; receiving third information sent by the terminal device, wherein the third information is a response to a target second information in the second information; and sending fourth information to the terminal device, wherein the fourth information is response information to the third information.

[0008] In a third aspect, a random access device is provided, including: a first processing module for sending first information for random access, wherein the preamble carried by the first information is determined based on information of multiple target signals; a first receiving module for receiving second information sent by a network device, wherein the second information is a random access response to the first information; a first sending module for sending third information based on the second information; and a first operating module for receiving fourth information sent by the network device, wherein the fourth information is response information to the third information.

[0009] In a fourth aspect, a random access device is provided, including: a second processing module for receiving first information for random access sent by a terminal device, wherein the preamble carried by the first information is determined based on information of multiple target signals; a second sending module for sending second information to the terminal device, wherein the second information is a random access response to the first information; a second receiving module for receiving third information sent by the terminal device, wherein the third information is a response to a target second information in the second information; and a second operation module for sending fourth information to the terminal device, wherein the fourth information is response information to the third information.

[0010] In a fifth aspect, a terminal device is provided, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect.

[0011] In a sixth aspect, a network device is provided, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the second aspect.

[0012] In a seventh aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect or the second aspect are implemented.

[0013] In an eighth aspect, a computer program product is provided, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect or the second aspect.

[0014] In a ninth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to run a program or instruction to implement the method described in the first aspect or the second aspect.

[0015] An embodiment of the present invention provides a random access method, terminal device, and network device, which can implement random access for a cell-free communication system by sending first information for random access, wherein the preamble carried by the first information is determined based on information of multiple target signals; receiving second information sent by the network device, where the second information is a random access response to the first information; sending third information based on the second information; and receiving fourth information sent by the network device, where the fourth information is response information to the third information. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 A block diagram of a wireless communication system to which the embodiments of the present application can be applied is shown.

[0018] Figure 2 is a schematic flowchart of a random access method according to an embodiment of the present invention;

[0019] Figure 3 is a schematic flowchart of a random access method according to an embodiment of the present invention;

[0020] Figure 4is a schematic flowchart of a random access method according to an embodiment of the present invention;

[0021] Figure 5 is a schematic flowchart of a random access method according to an embodiment of the present invention;

[0022] Figure 6 is a schematic flowchart of a random access method according to an embodiment of the present invention;

[0023] Figure 7 is a schematic flowchart of a random access method according to an embodiment of the present invention;

[0024] Figure 8 is a schematic flowchart of a random access method according to an embodiment of the present invention;

[0025] Figure 9 is a structural diagram of a random access apparatus according to an embodiment of the present invention;

[0026] Figure 10 is a structural diagram of a random access apparatus according to an embodiment of the present invention;

[0027] Figure 11 is a schematic structural diagram of a network device according to another embodiment of the present invention;

[0028] Figure 12 is a structural diagram of a terminal device according to another embodiment of the present invention. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0030] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects and are not used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of this application can be implemented in an order other than those illustrated or described herein. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0031] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. However, the following description describes a New Radio (NR) system for illustrative purposes, and the NR terminology is used in most of the following description, but these technologies can also be applied to applications other than NR system applications, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0032] Figure 1The block diagram of a cell-free wireless communication system applicable to the embodiment of the present application is shown. The wireless communication system includes a terminal and multiple APs, wherein the AP can be a network-side device or a terminal. The terminal can also be referred to as a terminal device or a user equipment (UE), and the terminal can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile Internet device (Mobile Internet Device, MID), a wearable device (Wearable Device) or a vehicle-mounted device (VUE), a pedestrian terminal (PUE) and other terminal-side devices. Wearable devices include: bracelets, headphones, glasses, etc. It should be noted that the specific type of the terminal is not limited in the embodiment of the present application. The network side device can be a base station or a core network, where the base station can be called a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a B node, an evolved B node (eNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting and receiving point (Transmitting Receiving Point, TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

[0033] The random access method provided in the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0034] like Figure 2 As shown, an embodiment of the present invention provides a random access method 200, which can be executed by a terminal device. In other words, the method can be executed by software or hardware installed in the terminal device. The method includes the following steps:

[0035] S202: Send first information for random access.

[0036] The preamble carried by the first information is determined based on information of multiple target signals.

[0037] Taking the four-step RACH process as an example, compared to the terminal determining the PRACH timing based on an SSB index whose measured SS-RSRP is greater than a preset threshold, such as rsrp-ThreholdSSB, and sending MSG 1 in the four-step RACH process, this step determines the parameters of the random access preamble based on information from multiple target signals. The multiple target signals can be sent by multiple APs, such as multiple APs corresponding to the UE in a cell-free system.

[0038] In one implementation, the parameters of the preamble may include: a preamble index, a time domain resource of the preamble, or a frequency domain resource of the preamble.

[0039] In one implementation, the target signal may include: SSB, Channel State Information Reference Signal (CSI-RS), Tracking Reference Signal (TRS), Demodulation Reference Signal (DMRS), or other downlink reference signals.

[0040] In one implementation, the multiple target signals are indicated by the network device through random access-related signaling. In one implementation, the random access-related signaling carries at least one of the following information: an index of the preamble, an index of a physical random access channel (PRACH) mask (Mask index), and information about a carrier on which the first information is transmitted.

[0041] Optionally, the UE can determine the random access opportunity (RACH Occasion, RO) of MSG 1 based on the information of N (N>=1) reference signals or synchronization signals indicated by the base station signaling, and the PRACH Mask index indicated by the above base station signaling; the preamble index is determined according to the indication of the base station signaling (Random Access Preamble index).

[0042] In one implementation, the information of the multiple target signals is different, wherein the information of the target signal is at least one of the following information or parameters: the index of the target signal, the synchronization grid sync raster, the frequency domain resources, the time domain resources, the sequence format, the quasi-co-location related parameters, the beam, the transmission configuration indication TCI, the associated transmitting and receiving point TRP and the access point AP.

[0043] Specifically, optionally, the sync rasters of N reference signals or synchronization signals (e.g., SSB) are different; optionally, the frequency domain resources of the N reference signals or synchronization signals are different, such as different carriers (carriers) or resource blocks (ResourceBlock, RB)), or the time domain resources of the N reference signals or synchronization signals are different; optionally, the sequence formats of the N reference signals or synchronization signals are different; optionally, the N reference signals or synchronization signals are sent through different AP / TRPs, for example, the AP / TRP(s) associated with the N SSBs are different; optionally, the quasi-co-location related parameters of the N reference signals or synchronization signals are different, etc., which are not enumerated one by one.

[0044] Among them, if the channel characteristics on a symbol of a certain antenna port can be derived from another antenna port, the two ports are considered to be quasi-collocation (QCL), and the channel estimation result obtained from one port can be used for another port. For example, it can be considered that the two ports come from the same transmitting source. The qcl configuration can include a variety of different signal types, such as channel state information-reference signaling (CSI-RS) or SSB or sounding reference signal (SRS). The network side device can configure the corresponding QCL configuration for different beams. The network side device can change the beam in which the terminal works by changing the QCL configuration of the UE.

[0045] There are four types of QCL: type A, type B, type C, and type D. Higher layers configure QCL through the Transmission Configuration Indicator State (TCI-State). The TCI-State parameters are used to configure a quasi-co-location relationship between one or two downlink reference signals and the DMRS of the PDSCH.

[0046] In one implementation, the first information for random access is MSG 1 in the four-step RACH process. The UE can determine N MSG 1 related information and send multiple MSG 1s based on information of N (N>=1) detected target signals, i.e., reference signals or synchronization signals.

[0047] In one implementation, the first information is sent to multiple associated transmitting TRPs or APs via multiple beams, where the multiple beams correspond to one or more panels of the terminal device. For example, if the target frequency range (FR) is FR, the preamble needs to be sent to two TRPs / APs via two beams of one panel or two beams of two panels.

[0048] In one implementation, in a cell-free scenario, multiple cells / APs share RACH resources, and the corresponding SSB-associated PCI / AP IDs may be different. The base station notifies the UE of these associations through broadcast signaling. The RACH resources shared by the above-mentioned multiple cells / APs can be sent through a SIB1 message, that is, in a cell-free scenario, the broadcast of a cell / AP includes information about the shared RACH resources of the cells corresponding to multiple surrounding cells / APs. To further alleviate the RACH overhead in a cell-free scenario, a cell can broadcast information about multiple frequency points that the UE can initiate access, and the UE can select one of the multiple frequency points to initiate access.

[0049] S204: Receive second information sent by the network device.

[0050] The second information is a random access response to the first information.

[0051] S206: Send third information according to the second information.

[0052] S208: Receive fourth information sent by the network device.

[0053] The fourth information is response information to the third information.

[0054] In one implementation, the random access method provided in an embodiment of the present invention can be applied to new radio access technology unlicensed frequency band (New RAT Un-licensed, NR-U), beam failure recovery (Beam Failure Recovery, BFR), etc.

[0055] The random access method provided by an embodiment of the present invention sends first information for random access, wherein the preamble carried by the first information is determined based on information of multiple target signals; receives second information sent by a network device, and the second information is a random access response to the first information; sends third information based on the second information; receives fourth information sent by the network device, and the fourth information is response information to the third information, thereby realizing random access for a cell-free communication system.

[0056] like Figure 3 As shown, an embodiment of the present invention provides a random access method 300, which can be executed by a terminal device. In other words, the method can be executed by software or hardware installed in the terminal device. The method includes the following steps:

[0057] S301: Measure a downlink signal, and determine the multiple target signals according to the measurement result of the downlink signal.

[0058] The target measurement values ​​corresponding to the multiple target signals meet at least one of the following preset conditions.

[0059] In one implementation, the multiple target signals are obtained by measurement. In this case, the target measurement values ​​corresponding to the multiple target signals meet a preset condition, wherein the preset condition includes at least one of the following:

[0060] The target measurement values ​​corresponding to the multiple target signals are greater than or equal to a first threshold;

[0061] The difference between the multiple target measurement values ​​corresponding to the multiple target signals is less than or equal to a second threshold.

[0062] The target measurement value is at least one of RSRP, signal-to-noise and interference ratio (SINR), and reference signal received quality (RSRQ).

[0063] In one implementation, the first threshold and / or the second threshold is configured by a network device for the terminal device.

[0064] S302: Send first information for random access.

[0065] The preamble carried by the first information is determined based on information of multiple target signals.

[0066] This step can be done using Figure 2The description of step S202 in the embodiment will not be repeated here.

[0067] In addition, the N (N>=1) SSB information determined by the UE measurement is indirectly notified to the base station through the preamble related information of MSG 1, and the N (N>=1) SSB information determined by the measurement can also be directly notified to the base station through the PUSCH of MSG 3.

[0068] S304: Receive second information sent by the network device.

[0069] The second information is a random access response to the first information.

[0070] S306: Send third information according to the second information.

[0071] S308: Receive fourth information sent by the network device.

[0072] The fourth information is response information to the third information.

[0073] S304-S308 This step can be Figure 2 The description of steps S204-208 of the embodiment will not be repeated here.

[0074] The random access method provided by an embodiment of the present invention sends first information for random access, wherein the preamble carried by the first information is determined based on information of multiple target signals; receives second information sent by a network device, and the second information is a random access response to the first information; sends third information based on the second information; receives fourth information sent by the network device, and the fourth information is response information to the third information, thereby realizing random access for a cell-free communication system.

[0075] like Figure 4 As shown, an embodiment of the present invention provides a random access method 400, which can be executed by a terminal device. In other words, the method can be executed by software or hardware installed in the terminal device. The method includes the following steps:

[0076] S402: Send first information for random access, wherein a preamble carried by the first information is determined based on information of multiple target signals, and the information of the target signals is associated with parameters of the preamble.

[0077] This step can be done using Figure 2 Example step S202, Figure 3 The description of step S302 in the embodiment will not be repeated here.

[0078] In one implementation, the target signal information is associated with the parameters of the preamble, wherein the preamble parameters include: at least one of the preamble index, the preamble frequency domain resources, and the preamble time domain resources. The target signal information includes: the target signal index, synchronization raster, frequency domain resources, time domain resources, sequence format, quasi-co-location related parameters, beam, transmission configuration indication (TCI), associated transmit / receive point (TRP), and access point (AP).

[0079] For example, Table 1 shows that there is an association relationship between the information of the target signal and the parameters of the Preamble.

[0080] Table 1:

[0081]

[0082] In one implementation, there is an association between the index of the preamble and the preamble sequence format, wherein the preamble sequence format includes at least one of a sequence length, an SCS, and a root sequence.

[0083] In one implementation, the information of the multiple target signals includes: the difference between the multiple target measurement values ​​corresponding to the multiple target signals. That is, the difference between the multiple target measurement values ​​corresponding to the multiple target signals is associated with the parameters of the Preamble. For example, the difference between the RSRP of the two strongest SSBs detected by the UE (SSB1 and SSB3) is 1dB and the difference between the RSRP of the two strongest SSBs detected by the UE (SSB1 and SSB3) is 4dB, and the corresponding {preambleindex, preamble time domain resources, preamble frequency domain resources} combinations are different.

[0084] In one implementation, the association relationship between the target signal information and the parameters of the Preamble is a one-to-one correspondence.

[0085] In one implementation, based on the one-to-one correspondence, parameters of the multiple Preambles corresponding to the information of the multiple target signals are determined.

[0086] In one implementation, based on the association between the information of the target signal and the parameters of the preamble, the parameters of the preamble corresponding to the information of the multiple target signals are determined. Specifically, based on the association between the information of the target signal and the parameters of the preamble, the parameters of the preamble corresponding to the information of the multiple target signals are determined, which can include two implementations:

[0087] Mode 1: determining ROs associated with the multiple target signals; and determining a first target preamble from multiple preambbles corresponding to one or more ROs associated with the multiple target signals.

[0088] Mode 2: Determine ROs associated with the multiple target signals; select an RO from the multiple ROs associated with the multiple target signals, wherein the Preamble corresponding to the selected RO is used as a Preamble candidate set; and determine a second target Preamble from the Preamble candidate set.

[0089] S404: Receive second information sent by the network device.

[0090] The second information is a random access response to the first information.

[0091] S406: Send third information according to the second information.

[0092] S408: Receive fourth information sent by the network device.

[0093] The fourth information is response information to the third information.

[0094] S404-S308 This step can be Figure 2 The description of steps S204-208 of the embodiment will not be repeated here.

[0095] The random access method provided by an embodiment of the present invention sends first information for random access, wherein the preamble carried by the first information is determined based on information of multiple target signals; receives second information sent by a network device, and the second information is a random access response to the first information; sends third information based on the second information; receives fourth information sent by the network device, and the fourth information is response information to the third information, thereby realizing random access for a cell-free communication system.

[0096] like Figure 5As shown, an embodiment of the present invention provides a random access method 500, which can be executed by a terminal device. In other words, the method can be executed by software or hardware installed in the terminal device. The method includes the following steps:

[0097] S502: When the terminal device is configured with multiple uplink carriers, if the target measurement values ​​corresponding to the multiple target signals meet a first condition, the first information is sent via a target carrier among the multiple uplink carriers.

[0098] This step can be done using Figure 2 Example step S202, Figure 3 Example step S302, Figure 4 The description of step S402 in the embodiment will not be repeated here.

[0099] In one implementation, before sending the first information for random access, a random access Radio Network Temporary Identifier (RNTI) may be determined according to the target carrier.

[0100] In one implementation, if the target measurement values ​​corresponding to the multiple target signals are greater than a fourth threshold, the first information is sent through the first carrier among the multiple uplink carriers; if the target measurement value corresponding to at least one target signal among the multiple target signals is not greater than the fourth threshold, the first information is sent through the second carrier among the multiple uplink carriers; wherein the frequency of the first carrier is higher than the frequency of the second carrier.

[0101] For example, if the UE is configured with multiple uplink carriers, such as a high-frequency carrier and a low-frequency carrier to send the preamble, if the RSRP / SINR / RSRQ of the N reference signals or synchronization signals are all less than the fourth threshold, the UE sends MSG 1 through the target carrier (e.g., a carrier with a lower frequency); otherwise, MSG 1 is sent through another carrier (e.g., a carrier with a higher frequency);

[0102] The calculation formula for determining the Random Access RNTI (RA-RNTI) is related to the carrier through which the preamble is sent, for example, the carrier ID.

[0103] In one implementation, the scrambling sequence used for the PUSCH data of the first information is:

[0104] C init =n RNTI ×2 16 +n RAPID ×210 +n ID

[0105] Among them, n RNTI is the random access RNTI, which is determined by the time-frequency resource position of the random access opportunity RO, n RAPID Indicates the index of the preamble, n ID Indicates the cell identification ID.

[0106] S504: Receive second information sent by the network device, where the second information is a random access response to the first information.

[0107] S506: Send third information according to the second information.

[0108] S508: Receive fourth information sent by the network device.

[0109] The fourth information is response information to the third information.

[0110] S504-S508 This step can be Figure 2 The description of steps S204-208 of the embodiment will not be repeated here.

[0111] The random access method provided by an embodiment of the present invention sends first information for random access, wherein the preamble carried by the first information is determined based on information of multiple target signals; receives second information sent by a network device, and the second information is a random access response to the first information; sends third information based on the second information; receives fourth information sent by the network device, and the fourth information is response information to the third information, thereby realizing random access for a cell-free communication system.

[0112] like Figure 6 As shown, an embodiment of the present invention provides a random access method 600, which can be executed by a terminal device. In other words, the method can be executed by software or hardware installed in the terminal device. The method includes the following steps:

[0113] S601: Determine the transmission power of the first information of the random access according to the path loss values ​​of the multiple target signals.

[0114] Each target signal corresponds to its own path loss value. The RSRP of multiple SSBs associated with the first information is considered; for example, the multiple SSBs are sent through multiple APs, which means that the transmit power of the first information takes into account the path losses from multiple APs to the terminal.

[0115] S602: Send first information for random access, where a preamble carried by the first information is determined based on information of multiple target signals.

[0116] This step can be done using Figure 2 Example step S202, Figure 3 Example step S302, Figure 4 Example step S402, Figure 5 The description of step S502 in the embodiment will not be repeated here.

[0117] S604: Receive second information sent by the network device.

[0118] The second information is a random access response to the first information.

[0119] S606: Send third information according to the second information.

[0120] S608: Receive fourth information sent by the network device.

[0121] The fourth information is response information to the third information.

[0122] S604-S608 This step can be Figure 2 The description of steps S204-208 of the embodiment will not be repeated here.

[0123] The random access method provided by an embodiment of the present invention sends first information for random access, wherein the preamble carried by the first information is determined based on information of multiple target signals; receives second information sent by a network device, and the second information is a random access response to the first information; sends third information based on the second information; receives fourth information sent by the network device, and the fourth information is response information to the third information, thereby realizing random access for a cell-free communication system.

[0124] like Figure 7 As shown, an embodiment of the present invention provides a random access method 700, which can be performed by a terminal device and / or a network device. In other words, the method can be performed by software or hardware installed in the terminal device and / or the network device. The method includes the following steps:

[0125] S702: The terminal device sends first information for random access.

[0126] The preamble carried by the first information is determined based on the information of multiple target signals. This step can be done by Figure 2 Example step S202, Figure 3 Example step S302, Figure 4 Example step S402, Figure 5 Example step S502, Figure 6 The description of step S602 in the embodiment will not be repeated here.

[0127] S704: The network device receives first information for random access sent by the terminal device, and sends second information to the terminal device, where the second information is a random access response to the first information.

[0128] This step can be done using Figure 2 Example step S204, Figure 3 Example step S304, Figure 4 Example step S404, Figure 5 Example step S504, Figure 6 The description of step S604 in the embodiment is repeated and will not be repeated here.

[0129] The network device determines parameters for sending second information based on information of multiple target signals corresponding to the Preamble, and sends the second information to the terminal device. The parameters of the second information include at least one of access point information, beam information, quasi co-location information, and transmission configuration indication information.

[0130] The second information may be sent in one of the following ways:

[0131] Method 1: Multiple second messages are sent based on multiple quasi-co-location related parameters corresponding to the multiple target signals. For example, the base station sends MSG2 to the UE using N quasi-co-location related parameters corresponding to N SSB indices, where the N quasi-co-location related parameters correspond to different TBs or the same TB, and N ≥ 2. The higher layer configures QCL through TCI-State.

[0132] Method 2: The second information is sent based on at least one first quasi-co-location-related parameter corresponding to the multiple target signals. For example, the base station sends MSG2 to the UE using X (N>X>1) of the N quasi-co-location-related parameters corresponding to N SSB indices. The higher layer configures the QCL using TCI-State.

[0133] Method 3: Send the second information according to the second quasi-co-location related parameter, wherein the second quasi-co-location related parameter is different from the multiple quasi-co-location related parameters corresponding to the multiple target signals. In other words, the second information is sent according to the second quasi-co-location related parameter corresponding to the signal other than the target signal. For example, the base station sends MSG2 to the UE using a quasi-co-location related parameter corresponding to an SSB different from the N SSB indexes. At this time, the UE needs to detect the new SSB and receive MSG2 in the four-step RACH. Different SSBs or quasi-co-location related parameters can correspond to one or more APs.

[0134] In one implementation, MSG2 includes new QCL / TCI information, for example, different from the QCL / TCI of the previous SSB; for example, the new QCL information is included in MSG2, and the UE uses the new QCL / TCI information to receive MSG4. When receiving MSG2, the UE assumes N TCIs corresponding to N SSB indexes or one TCI information corresponding to one SSB.

[0135] In one implementation, after receiving MSG 1, the base station can determine the AP or beam information of MSG 2, thereby enhancing the transmission reliability of MSG 1 and MSG 2, thereby improving the reliability of the random access process in the Cell-free network.

[0136] Correspondingly, the terminal device receives the second information sent by the network device in S708.

[0137] In one implementation, when the number of APs associated with the multiple target signals is greater than or equal to two, the second time interval between the terminal device sending the first information and receiving the second information is greater than or equal to the first time interval, wherein the first time interval is the time interval between the terminal device sending the first information and receiving the second information when the number of APs associated with the multiple target signals is one.

[0138] For example, if the N SSBs associated with MSG 1 are associated with two or more APs, and the time interval is X1, then because the uplink requires two or more APs to receive MSG 1 and jointly receive it, the received data needs to be aggregated across multiple APs. This may cause the base station's processing delay T1 of MSG 1 to be longer than the delay T2 of a single AP processing MSG 1. For another example, if the N SSBs associated with MSG 1 are associated with only one AP, the time interval is X2 (X2 <= X1).

[0139] When the UE successfully receives a RAR (decoded using the RA-RNTI) and the preamble index in the RAR is the same as the preamble index sent by the UE, it is considered that the RAR has been successfully received, and the UE can stop monitoring the RAR.

[0140] S706: The terminal device receives the second information sent by the network device, and sends third information according to the second information.

[0141] The second information is a random access response to the first information. Specifically, the terminal device receives one or more second information sent by the network device, wherein the target information in the second information is determined by the network device based on the first information, and the second information includes first parameter information, and the indicated first parameter information is different from the information of the target signal. The first parameter information indicated by the second information includes: at least one of: AP, TRP, beam, quasi co-location, and transmission configuration indication TCI.

[0142] In one implementation, if the terminal device does not receive the second information or the received second information does not carry a preamble index, the first information is retransmitted. Furthermore, if the first information is retransmitted, the transmit power is increased based on the number of retransmissions to improve the successful reception rate. If the first information is retransmitted, the transmission format of the first information remains unchanged.

[0143] Optionally, the transmit power is determined according to the following formula:

[0144] P PRACH,b,f,c (i) = min{P CMAX,f,c (i),P PRACH,target,f,c +PL b,f,c}

[0145] Among them, P PRACH,b,f,c (i) is the transmission power of the physical random access channel (PRACH), P CMAX,f,c (i) is the maximum output power configured by the UE for the serving cell carrier within the transmission scenario, P PRACH,target,f,c The target power received by the PRACH target received power preamble provided by the upper layer for the activated UL BWP of the serving cell carrier, PL b,f,c It is the path loss of the carrier activated uplink bandwidth part UL-BWP associated with the PRACH transmission on the activated downlink bandwidth part DL-BWP of the serving cell.

[0146] Optional, is based on the path loss of the carrier-active UL-BWP associated with the PRACH transmission on the serving cell's activated DL-BWP.

[0147] If the UE successfully receives a RAR and the preamble index (ie, RAPID, Random Access Preamble Identifier) ​​carried in the RAR is the same as the preamble index sent by the UE, the UE sends MSG3.

[0148] MSG3 indicates implicitly (for example, through the scrambling sequence of DMRS) or explicitly (for example, through a bit of MSG3) the SSB index or TCI or quasi-co-location related parameter information corresponding to MSG2 successfully received by the UE.

[0149] The terminal device determines a target second message from one or more second messages, responds to the target second message by sending the third message, and determines, based on the target second message, quasi-co-location information for receiving the fourth message. That is, the QCL of the determined target MSG2 is consistent with that of MSG4.

[0150] S708: The network device receives the third information sent by the terminal device, and sends fourth information to the terminal device, where the fourth information is response information to the third information.

[0151] The third information is a response to a target second information in the second information.

[0152] If the base station successfully receives MSG3, it sends MSG4.

[0153] The first information is MSG1 in the four-step random access process; the second information is MSG2 in the four-step random access process; the third information is MSG3 in the four-step random access process; and the fourth information is MSG4 in the four-step random access process.

[0154] S710: The terminal device receives the fourth information sent by the network device.

[0155] The fourth information is response information to the third information, thereby completing the RACH.

[0156] The random access method provided by an embodiment of the present invention sends first information for random access, wherein the preamble carried by the first information is determined based on information of multiple target signals; receives second information sent by a network device, and the second information is a random access response to the first information; sends third information based on the second information; receives fourth information sent by the network device, and the fourth information is response information to the third information, thereby realizing random access for a cell-free communication system.

[0157] In addition, in Figure 2-7 In a different implementation of the embodiment, the preamble carried by the first information is determined based on information of multiple target signals, which may include: being determined based on information of one target signal among the multiple target signals.

[0158] And, after determining the information of the associated uplink shared channel PUSCH and the information of the demodulation reference signal DMRS, the method also includes: sending PUSCH, where the PUSCH includes: multiple target signals that meet the predetermined parameter requirements and at least one of the target measurement values ​​corresponding to the multiple target signals that meet the predetermined parameter requirements.

[0159] Combination of the above Figure 2-7 The random access method according to the embodiment of the present invention is described in detail. Figure 8 The random access method according to another embodiment of the present invention is described in detail. It can be understood that the interaction between the network device and the terminal device described from the network device side is the same as that described in the embodiment of the present invention. Figure 2-7 The description on the terminal device side in the method shown is the same or corresponding. To avoid repetition, the relevant description is appropriately omitted.

[0160] Figure 8 FIG. 1 is a flow chart of a random access method according to an embodiment of the present invention, which can be applied to a network device. Figure 8 As shown, the method 800 includes:

[0161] S802: Receive first information for random access sent by a terminal device, wherein a preamble carried by the first information is determined based on information of multiple target signals.

[0162] This step can be done using Figure 2 Example step S202, Figure 3 Example step S302, Figure 4 Example step S402, Figure 5 Example step S502, Figure 6 Example step S602, Figure 7 The corresponding description of step S702 of the embodiment will not be repeated here.

[0163] S804: Send second information to the terminal device, where the second information is a random access response to the first information.

[0164] This step can be done using Figure 2 Example step S204, Figure 3 Example step S304, Figure 4 Example step S404, Figure 5 Example step S504, Figure 6Example step S604, Figure 7 The corresponding description of step S704 of the embodiment will not be repeated here.

[0165] S806: Receive third information sent by the terminal device, where the third information is a response to a target second information in the second information.

[0166] This step can be done using Figure 2 Example step S206, Figure 3 Example step S306, Figure 4 Example step S406, Figure 5 Example step S506, Figure 6 Example step S606, Figure 7 The corresponding description of step S706 of the embodiment will not be repeated here.

[0167] S808: Send fourth information to the terminal device, where the fourth information is response information to the third information.

[0168] This step can be done using Figure 2 Example step S208, Figure 3 Example step S308, Figure 4 Example step S408, Figure 5 Example step S508, Figure 6 Example step S608, Figure 7 The corresponding description of step S708 of the embodiment will not be repeated here.

[0169] It should be noted that the random access method provided in the embodiment of the present application can be performed by a random access device or a control module in the device for executing and loading the above method. In the embodiment of the present application, the random access method provided in the embodiment of the present application is described by taking the random access device executing the random access method as an example.

[0170] Figure 9 FIG is a schematic diagram of the structure of a random access device according to an embodiment of the present invention. Figure 9 As shown, the random access apparatus 900 includes: a first processing module 910 , a first receiving module 920 , a first sending module 930 , and a first operating module 940 .

[0171] The first processing module 910 is configured to send first information for random access, wherein a preamble carried by the first information is determined based on information of multiple target signals.

[0172] The first receiving module 920 is configured to receive second information sent by a network device, where the second information is a random access response to the first information.

[0173] The first sending module 930 is configured to send third information according to the second information.

[0174] The first operating module 940 is configured to receive fourth information sent by the network device, where the fourth information is response information to the third information.

[0175] In one implementation, the information of the multiple target signals is different, wherein the information of the target signal is at least one of the following: the index of the target signal, the synchronization grid sync raster, the frequency domain resources, the time domain resources, the sequence format, the quasi-co-location related parameters, the beam, the transmission configuration indication TCI, the associated transmitting and receiving point TRP and the access point AP.

[0176] In one implementation, the first processing module 910 is configured to measure a downlink signal before sending the first information for random access;

[0177] Determine the multiple target signals based on the measurement result of the downlink signal; wherein the target measurement values ​​corresponding to the multiple target signals meet at least one of the following preset conditions:

[0178] The target measurement values ​​corresponding to the multiple target signals are greater than or equal to a first threshold;

[0179] The difference between the multiple target measurement values ​​corresponding to the multiple target signals is less than or equal to a second threshold;

[0180] The target measurement value is at least one of a reference signal received power (RSRP), a signal to interference plus noise ratio (SINR), and a reference signal received quality (RSRQ).

[0181] In one implementation, the first threshold and / or the second threshold is configured by a network device for the terminal device.

[0182] In one implementation, the multiple target signals are indicated by the network device through random access related signaling.

[0183] In one implementation, the random access-related signaling carries at least one of the following information:

[0184] The index of the Preamble, the index of the physical random access channel PRACH mask, and the carrier information for sending the first information.

[0185] In one implementation, the target signal information is associated with the parameters of the Preamble;

[0186] The parameters of the Preamble include: at least one of the index of the Preamble, the frequency domain resources of the Preamble, and the time domain resources of the Preamble.

[0187] In one implementation, there is an association between the index of the Preamble and the preamble sequence format, wherein the preamble sequence format includes at least one of a sequence length, a subcarrier spacing SCS, and a root sequence.

[0188] In one implementation, the information of the multiple target signals includes: differences between multiple target measurement values ​​corresponding to the multiple target signals.

[0189] In one implementation, the association relationship between the target signal information and the parameters of the Preamble is a one-to-one correspondence.

[0190] In one implementation, the first processing module 910 is configured to determine the parameters of the Preamble corresponding to the information of the multiple target signals based on an association between the information of the target signal and the parameters of the Preamble before sending the first information for random access.

[0191] In one implementation, the first processing module 910 is configured to determine the parameters of the Preamble corresponding to the information of the multiple target signals based on the association between the information of the target signal and the parameters of the Preamble, including:

[0192] Determining random access occasions RO associated with the multiple target signals;

[0193] A first target Preamble is determined from a plurality of Preambularies corresponding to the ROs associated with the plurality of target signals.

[0194] In one implementation, the first processing module 910 is configured to determine the parameters of the Preamble corresponding to the information of the multiple target signals based on the association between the information of the target signal and the parameters of the Preamble, including:

[0195] determining ROs associated with the plurality of target signals;

[0196] Selecting an RO from the ROs associated with the multiple target signals, wherein the Preamble corresponding to the selected RO is used as a Preamble candidate set;

[0197] A second target preamble is determined from the preamble candidate set.

[0198] In one implementation, the first processing module 910 is used to send the first information through a target carrier among the multiple uplink carriers if the target measurement values ​​corresponding to the multiple target signals meet a first condition when the terminal device is configured with multiple uplink carriers.

[0199] In one implementation, when the terminal device is configured with multiple uplink carriers, if the target measurement values ​​corresponding to the multiple target signals meet a first condition, sending the first information through a target carrier among the multiple uplink carriers includes:

[0200] If the target measurement values ​​corresponding to the multiple target signals are greater than a fourth threshold, sending the first information through a first carrier among the multiple uplink carriers;

[0201] If the target measurement value corresponding to at least one target signal among the multiple target signals is not greater than a fourth threshold, the first information is sent through a second carrier among the multiple uplink carriers; wherein the frequency of the first carrier is higher than the frequency of the second carrier.

[0202] In one implementation, the first processing module 910 is configured to determine a random access radio network temporary identifier RNTI according to the target carrier before sending the first information for random access.

[0203] In one implementation, the first processing module 910 is configured to determine the transmit power of the first random access information according to the path loss values ​​of the plurality of target signals before sending the first random access information; wherein each target signal corresponds to a respective path loss value.

[0204] In one implementation, the first processing module 910 is used to send the first information to multiple associated TRPs or APs through multiple beams, respectively, wherein the multiple beams correspond to one or more panels of the terminal device.

[0205] In one implementation, receiving the second information sent by the network device includes one of the following methods:

[0206] receiving a plurality of second information according to a plurality of quasi co-location related parameters corresponding to the plurality of target signals;

[0207] receiving the second information according to at least one first quasi-co-location related parameter corresponding to the multiple target signals;

[0208] The second information is received according to second quasi-co-location related information, wherein the second quasi-co-location related parameter is different from a plurality of quasi-co-location related parameters corresponding to a plurality of target signals.

[0209] In one implementation, the second information carries frequency domain position information corresponding to the fourth information.

[0210] In one implementation, when the number of APs associated with the multiple target signals is greater than or equal to two, the second time interval between the terminal device sending the first information and receiving the second information is greater than or equal to the first time interval, wherein the first time interval is the time interval between the terminal device sending the first information and receiving the second information when the number of APs associated with the multiple target signals is one.

[0211] In one implementation, the first processing module 910 is configured to process the second information including first parameter information, where the first parameter information is different from information of the target signal.

[0212] In one implementation, the first processing module 910 is used to process the first parameter information including at least one of: AP, TRP, beam, quasi-co-location, and transmission configuration indication TCI.

[0213] In one implementation, the first processing module 910 is configured to retransmit the first information if the terminal device does not receive the second information or the received second information does not carry a Preamble index.

[0214] In one implementation, when the first information is retransmitted, the transmission power is increased according to the number of retransmissions.

[0215] In one implementation, when the first information is retransmitted, the transmission format of the first information remains unchanged.

[0216] In one implementation, the first processing module 910 is configured to, after receiving multiple pieces of second information sent by the network device, determine a target second information from the multiple pieces of second information; and respond to the target second information to send third information.

[0217] In one implementation, the first processing module 910 is configured to determine, after sending the third information, based on the target second information, quasi-co-location information for receiving the fourth information.

[0218] In one implementation, the first information is MSG1 in the four-step random access process; the second information is MSG2 in the four-step random access process; the third information is MSG3 in the four-step random access process; and the fourth information is MSG4 in the four-step random access process.

[0219] The random access device in the embodiments of the present application can be a device, or a component, integrated circuit, or chip in a terminal. The device can be a mobile electronic device or a non-mobile electronic device. For example, the mobile electronic device can be a mobile phone, a tablet computer, a laptop computer, a PDA, an in-vehicle electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc. The non-mobile electronic device can be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine, or a self-service machine, etc., and the embodiments of the present application do not specifically limit this.

[0220] The random access device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0221] The device 900 according to an embodiment of the present invention can refer to the process of the method 900 corresponding to the embodiment of the present invention, and the various units / modules in the device 900 and the above-mentioned other operations and / or functions are respectively for implementing the corresponding processes executed by the terminal device of method 200-700, and can achieve the same or equivalent technical effects. For the sake of brevity, they will not be repeated here.

[0222] Figure 10 FIG is a schematic diagram of the structure of a random access device according to an embodiment of the present invention. Figure 10 As shown, the random access apparatus 1000 includes: a second processing module 1010 , a second sending module 1020 , a second receiving module 1030 , and a second operating module 1040 .

[0223] The second processing module 1010 is used to receive first information for random access sent by a terminal device, wherein a preamble carried by the first information is determined based on information of multiple target signals.

[0224] The second sending module 1020 is used to send second information to the terminal device, where the second information is a random access response to the first information.

[0225] The second receiving module 1030 is configured to receive third information sent by the terminal device, where the third information is a response to a target second information in the second information.

[0226] The second operation module 1040 is configured to send fourth information to the terminal device, where the fourth information is response information to the third information. In one implementation, the second sending module 1020 is configured to send a random access-related signaling indicating that the plurality of target signals are received by the network device before the first information of the random access is received.

[0227] In one implementation, the second processing module 1010 is used to receive the first information through a target carrier among the multiple uplink carriers if the target measurement values ​​corresponding to the multiple target signals meet a first condition when the terminal device is configured with multiple uplink carriers.

[0228] In one implementation, the second processing module 1010 is used to receive the first information through the first carrier among the multiple uplink carriers if the target measurement value corresponding to the multiple target signals is greater than a fourth threshold; if the target measurement value corresponding to at least one target signal among the multiple target signals is not greater than the fourth threshold, receive the first information through the second carrier among the multiple uplink carriers; wherein the frequency of the first carrier is higher than the frequency of the second carrier.

[0229] In one implementation, the second information is sent in one of the following ways:

[0230] sending a plurality of second information according to a plurality of quasi co-location related parameters corresponding to the plurality of target signals;

[0231] sending the second information according to at least one first quasi-co-location related parameter corresponding to the multiple target signals;

[0232] The second information is sent according to a second quasi co-location related parameter, wherein the second quasi co-location related parameter is different from a plurality of quasi co-location related parameters corresponding to the plurality of target signals.

[0233] In one implementation, when the number of APs associated with the multiple target signals is greater than or equal to two, the second time interval between the terminal device sending the first information and receiving the second information is greater than or equal to the first time interval, wherein the first time interval is the time interval between the terminal device sending the first information and receiving the second information when the number of APs associated with the multiple target signals is one.

[0234] In one implementation, the second information includes first parameter information, and the first parameter information is different from information of the target signal.

[0235] In one implementation, the first parameter information includes at least one of: AP, TRP, beam, quasi-co-location, and transmission configuration indication TCI.

[0236] In one implementation, the second processing module 1010 is configured to, before sending the fourth information to the terminal device, further include:

[0237] Quasi co-location information for sending fourth information is determined according to the target second information.

[0238] In one implementation, the first information is MSG1 in the four-step random access process; the second information is MSG2 in the four-step random access process; the third information is MSG3 in the four-step random access process; and the fourth information is MSG4 in the four-step random access process.

[0239] The random access device in the embodiments of the present application can be a device, or a component, integrated circuit, or chip in a terminal. The device can be a mobile electronic device or a non-mobile electronic device. For example, the mobile electronic device can be a mobile phone, a tablet computer, a laptop computer, a PDA, an in-vehicle electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc. The non-mobile electronic device can be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine, or a self-service machine, etc., and the embodiments of the present application do not specifically limit this.

[0240] The random access device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0241] The device 1000 according to an embodiment of the present invention can refer to the process of the method 1000 corresponding to the embodiment of the present invention, and the various units / modules in the device 1000 and the above-mentioned other operations and / or functions are respectively for implementing the corresponding processes executed by the network device of methods 700-800, and can achieve the same or equivalent technical effects. For the sake of brevity, they will not be repeated here.

[0242] The embodiment of the present application also provides a network side device. Figure 11As shown, network device 1100 includes an antenna 1101, a radio frequency device 1102, and a baseband device 1103. Antenna 1101 is connected to radio frequency device 1102. In the uplink direction, radio frequency device 1102 receives information via antenna 1101 and sends the received information to baseband device 1103 for processing. In the downlink direction, baseband device 1103 processes the information to be transmitted and sends it to radio frequency device 1102. Radio frequency device 1102 processes the received information and then sends it through antenna 1101.

[0243] The frequency band processing device may be located in the baseband device 1103 . The method performed by the network-side device in the above embodiment may be implemented in the baseband device 1103 . The baseband device 1103 includes a processor 1104 and a memory 1105 .

[0244] The baseband device 1103 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in the figure, one of the chips is, for example, a processor 1104, which is connected to the memory 1105 to call the program in the memory 1105 and execute the network device operations shown in the above method embodiment.

[0245] The baseband device 1103 may further include a network interface 1106 for exchanging information with the radio frequency device 1102 . The interface may be, for example, a common public radio interface (CPRI).

[0246] Specifically, the network-side device of the embodiment of the present invention further includes: instructions or programs stored in the memory 1105 and executable on the processor 1104, and the processor 1104 calls the instructions or programs in the memory 1105 to execute:

[0247] In one implementation, before receiving the first random access information, the method further includes: sending random access related signaling to the network device indicating the multiple target signals.

[0248] In one implementation, the receiving first information for random access includes:

[0249] In a case where the terminal device is configured with multiple uplink carriers, if the target measurement values ​​corresponding to the multiple target signals meet a first condition, the first information is received through a target carrier among the multiple uplink carriers.

[0250] In one implementation, when the terminal device is configured with multiple uplink carriers, if the target measurement values ​​corresponding to the multiple target signals meet a first condition, receiving the first information through a target carrier among the multiple uplink carriers includes:

[0251] If the target measurement values ​​corresponding to the multiple target signals are greater than a fourth threshold, receiving the first information through a first carrier among the multiple uplink carriers;

[0252] If the target measurement value corresponding to at least one target signal among the multiple target signals is not greater than a fourth threshold, the first information is received through a second carrier among the multiple uplink carriers; wherein the frequency of the first carrier is higher than the frequency of the second carrier.

[0253] In one implementation, the second information is sent in one of the following ways:

[0254] sending a plurality of second information according to a plurality of quasi co-location related parameters corresponding to the plurality of target signals;

[0255] sending the second information according to at least one first quasi-co-location related parameter corresponding to the multiple target signals;

[0256] The second information is sent according to a second quasi co-location related parameter, wherein the second quasi co-location related parameter is different from a plurality of quasi co-location related parameters corresponding to the plurality of target signals.

[0257] In one implementation, when the number of APs associated with the multiple target signals is greater than or equal to two, the second time interval between the terminal device sending the first information and receiving the second information is greater than or equal to the first time interval, wherein the first time interval is the time interval between the terminal device sending the first information and receiving the second information when the number of APs associated with the multiple target signals is one.

[0258] In one implementation, the second information includes first parameter information, and the first parameter information is different from information of the target signal.

[0259] In one implementation, the first parameter information includes at least one of: AP, TRP, beam, quasi-co-location, and transmission configuration indication TCI.

[0260] In one implementation, before sending the fourth information to the terminal device, quasi-co-location information for sending the fourth information is determined based on the target second information.

[0261] In one implementation, the first information is MSG1 in the four-step random access process; the second information is MSG2 in the four-step random access process; the third information is MSG3 in the four-step random access process; and the fourth information is MSG4 in the four-step random access process.

[0262] The specific steps performed by the processor 1104 are as follows: Figure 7-8The steps and methods executed by the network device achieve the same technical effect, so they will not be described here to avoid repetition.

[0263] Figure 12 A schematic diagram of the hardware structure of a terminal device for implementing an embodiment of the present application.

[0264] The terminal device 1200 includes but is not limited to: a radio frequency unit 1201, a network module 1202, an audio output unit 1203, an input unit 1204, a sensor 1205, a display unit 1206, a user input unit 1207, an interface unit 1208, a memory 1209, and a processor 1210 and other components.

[0265] Those skilled in the art will appreciate that the terminal device 1200 may further include a power source (such as a battery) to power various components. The power source may be logically connected to the processor 1210 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal device structure shown in the figure does not limit the terminal device. The terminal device may include more or fewer components than shown, or may combine certain components or arrange the components differently, which will not be described in detail here.

[0266] It should be understood that in an embodiment of the present application, the input unit 1204 may include a graphics processing unit (GPU) 12041 and a microphone 12042, and the graphics processor 12041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1206 may include a display panel 12061, and the display panel 12061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1207 includes a touch panel 12071 and other input devices 12072. The touch panel 12071 is also called a touch screen. The touch panel 12071 may include two parts: a touch detection device and a touch controller. Other input devices 12072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0267] In this embodiment of the present application, RF unit 1201 receives downlink data from a network-side device and transmits it to processor 1210 for processing. Furthermore, RF unit 1201 transmits uplink data to the network-side device. Typically, RF unit 1201 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0268] The memory 1209 can be used to store software programs or instructions and various data. The memory 1209 may mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area may store an operating system, at least one application program or instruction required for a function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1209 may include a high-speed random access memory and may also include a non-volatile memory, wherein the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. For example, at least one disk storage device, a flash memory device, or other non-volatile solid-state memory device.

[0269] Processor 1210 may include one or more processing units. Optionally, processor 1210 may integrate an application processor and a modem processor. The application processor primarily processes the operating system, user interface, and application programs or instructions, while the modem processor primarily processes wireless communications, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 1210.

[0270] Among them, the processor 1210 is used to send first information for random access, wherein the preamble code Preamble carried by the first information is determined based on information of multiple target signals; receive second information sent by the network device, where the second information is a random access response to the first information; send third information based on the second information; receive fourth information sent by the network device, where the fourth information is response information to the third information.

[0271] In one implementation, the information of the multiple target signals is different, wherein the information of the target signal is at least one of the following:

[0272] The index of the target signal, synchronization grid sync raster, frequency domain resources, time domain resources, sequence format, quasi-co-location related parameters, beam, transmission configuration indication TCI, associated transmitting and receiving points TRP and access points AP.

[0273] In one implementation, before sending the first information for random access, measuring a downlink signal;

[0274] Determine the multiple target signals based on the measurement result of the downlink signal; wherein the target measurement values ​​corresponding to the multiple target signals meet at least one of the following preset conditions:

[0275] The target measurement values ​​corresponding to the multiple target signals are greater than or equal to a first threshold;

[0276] The difference between the multiple target measurement values ​​corresponding to the multiple target signals is less than or equal to a second threshold;

[0277] The target measurement value is at least one of a reference signal received power (RSRP), a signal to interference plus noise ratio (SINR), and a reference signal received quality (RSRQ).

[0278] In one implementation, the first threshold and / or the second threshold is configured by a network device for the terminal device.

[0279] In one implementation, the multiple target signals are indicated by the network device through random access related signaling.

[0280] In one implementation, the random access-related signaling carries at least one of the following information:

[0281] The index of the Preamble, the index of the physical random access channel PRACH mask, and the carrier information for sending the first information.

[0282] In one implementation, the target signal information is associated with the parameters of the Preamble;

[0283] The parameters of the Preamble include: at least one of the index of the Preamble, the frequency domain resources of the Preamble, and the time domain resources of the Preamble.

[0284] In one implementation, there is an association between the index of the Preamble and the preamble sequence format, wherein the preamble sequence format includes at least one of a sequence length, a subcarrier spacing SCS, and a root sequence.

[0285] In one implementation, the information of the multiple target signals includes: differences between multiple target measurement values ​​corresponding to the multiple target signals.

[0286] In one implementation, the association relationship between the target signal information and the parameters of the Preamble is a one-to-one correspondence.

[0287] In one implementation, before sending the first information for random access, the method further includes:

[0288] Based on the association relationship between the information of the target signal and the parameters of the Preamble, the parameters of the Preamble corresponding to the information of the multiple target signals are determined.

[0289] In one implementation, determining the parameters of the Preamble corresponding to the information of the multiple target signals based on the association between the information of the target signal and the parameters of the Preamble includes:

[0290] Determining random access occasions RO associated with the multiple target signals;

[0291] A first target Preamble is determined from a plurality of Preambularies corresponding to the ROs associated with the plurality of target signals.

[0292] In one implementation, determining the parameters of the Preamble corresponding to the information of the multiple target signals based on the association between the information of the target signal and the parameters of the Preamble includes:

[0293] determining ROs associated with the plurality of target signals;

[0294] Selecting an RO from the ROs associated with the multiple target signals, wherein the Preamble corresponding to the selected RO is used as a Preamble candidate set;

[0295] A second target preamble is determined from the preamble candidate set.

[0296] In one implementation, the sending of first information for random access includes:

[0297] In a case where the terminal device is configured with multiple uplink carriers, if the target measurement values ​​corresponding to the multiple target signals meet a first condition, the first information is sent via a target carrier among the multiple uplink carriers.

[0298] In one implementation, when the terminal device is configured with multiple uplink carriers, if the target measurement values ​​corresponding to the multiple target signals meet a first condition, sending the first information through a target carrier among the multiple uplink carriers includes:

[0299] If the target measurement values ​​corresponding to the multiple target signals are greater than a fourth threshold, sending the first information through a first carrier among the multiple uplink carriers;

[0300] If the target measurement value corresponding to at least one target signal among the multiple target signals is not greater than a fourth threshold, the first information is sent through a second carrier among the multiple uplink carriers; wherein the frequency of the first carrier is higher than the frequency of the second carrier.

[0301] In one implementation, before sending the first information for random access, the method further includes:

[0302] A random access radio network temporary identifier RNTI is determined according to the target carrier.

[0303] In one implementation, before sending the first information for random access, the method further includes:

[0304] determining, according to the path loss values ​​of the plurality of target signals, a transmit power of the first information of the random access;

[0305] Each target signal corresponds to its own path loss value.

[0306] In one implementation, the sending of first information for random access includes:

[0307] The first information is sent to multiple associated TRPs or APs respectively through multiple beams, wherein the multiple beams correspond to one or more panels of the terminal device.

[0308] In one implementation, receiving the second information sent by the network device includes one of the following methods:

[0309] receiving a plurality of second information according to a plurality of quasi co-location related parameters corresponding to the plurality of target signals;

[0310] receiving the second information according to at least one first quasi-co-location related parameter corresponding to the multiple target signals;

[0311] The second information is received according to second quasi-co-location related information, wherein the second quasi-co-location related parameter is different from a plurality of quasi-co-location related parameters corresponding to a plurality of target signals.

[0312] In one implementation, the second information carries frequency domain position information corresponding to the fourth information.

[0313] In one implementation, when the number of APs associated with the multiple target signals is greater than or equal to two, the second time interval between the terminal device sending the first information and receiving the second information is greater than or equal to the first time interval, wherein the first time interval is the time interval between the terminal device sending the first information and receiving the second information when the number of APs associated with the multiple target signals is one.

[0314] In one implementation, the second information includes first parameter information, and the first parameter information is different from information of the target signal.

[0315] In one implementation, the first parameter information includes at least one of: AP, TRP, beam, quasi-co-location, and transmission configuration indication TCI.

[0316] In one implementation, when the terminal device does not receive the second information or the received second information does not carry a Preamble index, the first information is retransmitted.

[0317] In one implementation, when the first information is retransmitted, the transmission power is increased according to the number of retransmissions.

[0318] In one implementation, when the first information is retransmitted, the transmission format of the first information remains unchanged.

[0319] In one implementation, after receiving the plurality of second information sent by the network device, the method further includes:

[0320] determining a target second information from the plurality of second information;

[0321] The third information is sent in response to the target second information.

[0322] In one implementation, after sending the third information, the method further includes:

[0323] Quasi co-location information for receiving fourth information is determined according to the target second information.

[0324] In one implementation, the first information is MSG1 in the four-step random access process; the second information is MSG2 in the four-step random access process; the third information is MSG3 in the four-step random access process; and the fourth information is MSG4 in the four-step random access process.

[0325] The terminal device 1200 according to an embodiment of the present invention can refer to the process executed by the terminal device in the method 200-700 corresponding to the embodiment of the present invention, and the various units / modules and the above-mentioned other operations and / or functions in the terminal device 1200 are respectively for implementing the process executed by the terminal device in the method 200-700, and can achieve the same or equivalent technical effects. For the sake of brevity, they will not be repeated here.

[0326] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned random access method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0327] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), random access memory (RAM), a magnetic disk, or an optical disk.

[0328] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned random access method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0329] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0330] An embodiment of the present application further provides a computer program product, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect.

[0331] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0332] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), including a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0333] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A random access method, characterized in that: The method is executed by a terminal device, and includes: Sending first information for random access, wherein a preamble carried by the first information is determined based on information of multiple target signals; receiving second information sent by the network device, where the second information is a random access response to the first information; sending third information according to the second information; receiving fourth information sent by the network device, where the fourth information is response information to the third information; The information of the multiple target signals is different, and the information of the target signal is at least one of the following: an index of the target signal, a synchronization grid sync raster, frequency domain resources, time domain resources, a sequence format, quasi-co-location related parameters, a beam, a transmission configuration indication TCI, an associated transmitting and receiving point TRP, and an access point AP; Before sending the first information for random access, the method further includes: Measure downlink signals; Determine the multiple target signals based on the measurement result of the downlink signal; wherein the target measurement values ​​corresponding to the multiple target signals meet at least one of the following preset conditions: The target measurement values ​​corresponding to the multiple target signals are greater than or equal to a first threshold; The difference between the multiple target measurement values ​​corresponding to the multiple target signals is less than or equal to a second threshold; The target measurement value is at least one of a reference signal received power (RSRP), a signal to interference plus noise ratio (SINR), and a reference signal received quality (RSRQ).

2. The method according to claim 1, wherein The first threshold and / or the second threshold are configured by a network device for the terminal device.

3. The method according to claim 1, wherein There is an association relationship between the information of the target signal and the parameters of the Preamble; The parameters of the Preamble include: at least one of the index of the Preamble, the frequency domain resources of the Preamble, and the time domain resources of the Preamble.

4. The method according to claim 3, wherein There is an association between the index of the Preamble and the Preamble sequence format, wherein the Preamble sequence format includes at least one of a sequence length, a subcarrier spacing SCS, and a root sequence.

5. The method according to claim 3, wherein The information of the multiple target signals includes: differences between multiple target measurement values ​​corresponding to the multiple target signals.

6. The method according to claim 5, wherein The association relationship between the target signal information and the parameters of the Preamble is a one-to-one correspondence.

7. The method according to claim 6, wherein Before sending the first information for random access, the method further includes: Based on the association relationship between the information of the target signal and the parameters of the Preamble, the parameters of the Preamble corresponding to the information of the multiple target signals are determined.

8. The method according to claim 7, wherein Determining the parameters of the Preamble corresponding to the information of the multiple target signals based on an association between the information of the target signal and the parameters of the Preamble includes: Determining random access occasions RO associated with the multiple target signals; A first target Preamble is determined from a plurality of Preambularies corresponding to the ROs associated with the plurality of target signals.

9. The method according to claim 7, wherein Determining the parameters of the Preamble corresponding to the information of the multiple target signals based on an association between the information of the target signal and the parameters of the Preamble includes: determining ROs associated with the plurality of target signals; Selecting an RO from the ROs associated with the multiple target signals, wherein the Preamble corresponding to the selected RO is used as a Preamble candidate set; A second target preamble is determined from the preamble candidate set.

10. The method according to claim 1, wherein The sending of first information for random access includes: In a case where the terminal device is configured with multiple uplink carriers, if the target measurement values ​​corresponding to the multiple target signals meet a first condition, the first information is sent via a target carrier among the multiple uplink carriers.

11. The method according to claim 10, wherein When the terminal device is configured with multiple uplink carriers, if the target measurement values ​​corresponding to the multiple target signals meet a first condition, sending the first information through a target carrier among the multiple uplink carriers includes: If the target measurement values ​​corresponding to the multiple target signals are greater than a fourth threshold, sending the first information through a first carrier among the multiple uplink carriers; If the target measurement value corresponding to at least one target signal among the multiple target signals is not greater than a fourth threshold, the first information is sent through a second carrier among the multiple uplink carriers; wherein the frequency of the first carrier is higher than the frequency of the second carrier.

12. The method according to claim 10, wherein Before sending the first information for random access, the method further includes: A random access radio network temporary identifier RNTI is determined according to the target carrier.

13. The method according to claim 1, wherein Before sending the first information for random access, the method further includes: determining, according to the path loss values ​​of the plurality of target signals, a transmit power of the first information of the random access; Each target signal corresponds to its own path loss value.

14. The method according to claim 1, wherein The sending of first information for random access includes: The first information is sent to multiple associated TRPs or APs respectively through multiple beams, wherein the multiple beams correspond to one or more panels of the terminal device.

15. The method according to claim 1, wherein Receiving the second information sent by the network device includes one of the following methods: receiving a plurality of second information according to a plurality of quasi co-location related parameters corresponding to the plurality of target signals; receiving the second information according to at least one first quasi-co-location related parameter corresponding to the multiple target signals; The second information is received according to a second quasi co-location related parameter, wherein the second quasi co-location related parameter is different from a plurality of quasi co-location related parameters corresponding to a plurality of target signals.

16. The method according to claim 1, wherein The second information carries frequency domain position information corresponding to the fourth information.

17. The method according to claim 15, wherein When the number of APs associated with the multiple target signals is greater than or equal to two, the second time interval between the terminal device sending the first information and receiving the second information is greater than or equal to the first time interval, wherein the first time interval is the time interval between the terminal device sending the first information and receiving the second information when the number of APs associated with the multiple target signals is one.

18. The method according to claim 1, wherein The second information includes first parameter information, and the first parameter information is different from information of the target signal.

19. The method according to claim 18, wherein The first parameter information includes at least one of: AP, TRP, beam, quasi-co-location, and transmission configuration indication TCI.

20. The method of claim 1, wherein Also includes: If the terminal device does not receive the second information or the received second information does not carry the Preamble index, the first information is retransmitted.

21. The method according to claim 20, wherein In the case where the first information is retransmitted, the transmission power is increased according to the number of retransmissions.

22. The method according to claim 20, wherein When the first information is retransmitted, the transmission format of the first information remains unchanged.

23. The method according to claim 1, characterized in that After receiving the plurality of second information sent by the network device, the method further includes: determining a target second information from the plurality of second information; The third information is sent in response to the target second information.

24. The method according to claim 23, wherein After sending the third information, the method further includes: Quasi co-location information for receiving fourth information is determined according to the target second information.

25. The method of claim 1, wherein The first information is MSG1 in the four-step random access process; the second information is MSG2 in the four-step random access process; the third information is MSG3 in the four-step random access process; and the fourth information is MSG4 in the four-step random access process.

26. A random access method, characterized in that: The method is performed by a network device, and includes: Receiving first information for random access sent by a terminal device, wherein a preamble carried by the first information is determined based on information of multiple target signals; Sending second information to the terminal device, where the second information is a random access response to the first information; receiving third information sent by a terminal device, where the third information is a response to a target second information in the second information; Sending fourth information to the terminal device, where the fourth information is response information to the third information; The information of the multiple target signals is different, and the information of the target signal is at least one of the following: an index of the target signal, a synchronization grid sync raster, frequency domain resources, time domain resources, a sequence format, quasi-co-location related parameters, a beam, a transmission configuration indication TCI, an associated transmitting and receiving point TRP, and an access point AP; The multiple target signals are determined by the terminal device based on a measurement result of measuring a downlink signal; and the target measurement values ​​corresponding to the multiple target signals meet at least one of the following preset conditions: The target measurement values ​​corresponding to the multiple target signals are greater than or equal to a first threshold; The difference between the multiple target measurement values ​​corresponding to the multiple target signals is less than or equal to a second threshold; The target measurement value is at least one of a reference signal received power (RSRP), a signal to interference plus noise ratio (SINR), and a reference signal received quality (RSRQ).

27. The method according to claim 26, wherein The receiving first information for random access includes: In a case where the terminal device is configured with multiple uplink carriers, if the target measurement values ​​corresponding to the multiple target signals meet a first condition, the first information is received through a target carrier among the multiple uplink carriers.

28. The method of claim 27, wherein: When the terminal device is configured with multiple uplink carriers, if the target measurement values ​​corresponding to the multiple target signals meet a first condition, receiving the first information through a target carrier among the multiple uplink carriers includes: If the target measurement values ​​corresponding to the multiple target signals are greater than a fourth threshold, receiving the first information through a first carrier among the multiple uplink carriers; If the target measurement value corresponding to at least one target signal among the multiple target signals is not greater than a fourth threshold, the first information is received through a second carrier among the multiple uplink carriers; wherein the frequency of the first carrier is higher than the frequency of the second carrier.

29. The method of claim 26, wherein: The second information may be sent in one of the following ways: sending a plurality of second information according to a plurality of quasi co-location related parameters corresponding to the plurality of target signals; sending the second information according to at least one first quasi-co-location related parameter corresponding to the multiple target signals; The second information is sent according to a second quasi co-location related parameter, wherein the second quasi co-location related parameter is different from a plurality of quasi co-location related parameters corresponding to the plurality of target signals.

30. The method of claim 28, wherein When the number of APs associated with the multiple target signals is greater than or equal to two, the second time interval between the terminal device sending the first information and receiving the second information is greater than or equal to the first time interval, wherein the first time interval is the time interval between the terminal device sending the first information and receiving the second information when the number of APs associated with the multiple target signals is one.

31. The method of claim 26, wherein: The second information includes first parameter information, and the first parameter information is different from information of the target signal.

32. The method of claim 31, wherein The first parameter information includes at least one of: AP, TRP, beam, quasi-co-location, and transmission configuration indication TCI.

33. The method of claim 26, wherein: Before sending the fourth information to the terminal device, the method further includes: Quasi co-location information for sending fourth information is determined according to the target second information.

34. The method of claim 26, wherein: The first information is MSG1 in the four-step random access process; the second information is MSG2 in the four-step random access process; the third information is MSG3 in the four-step random access process; and the fourth information is MSG4 in the four-step random access process.

35. A random access device, characterized in that: include: A first processing module is configured to send first information for random access, wherein a preamble carried by the first information is determined based on information of multiple target signals; A first receiving module is configured to receive second information sent by a network device, where the second information is a random access response to the first information; A first sending module, configured to send third information according to the second information; A first operating module is configured to receive fourth information sent by the network device, where the fourth information is response information to the third information; The information of the multiple target signals is different, and the information of the target signal is at least one of the following: an index of the target signal, a synchronization grid sync raster, frequency domain resources, time domain resources, a sequence format, quasi-co-location related parameters, a beam, a transmission configuration indication TCI, an associated transmitting and receiving point TRP, and an access point AP; Before sending the first information for random access, the first processing module is further configured to: Measuring a downlink signal; and determining the multiple target signals based on the measurement results of the downlink signal; wherein the target measurement values ​​corresponding to the multiple target signals meet at least one of the following preset conditions: The target measurement values ​​corresponding to the multiple target signals are greater than or equal to a first threshold; The difference between the multiple target measurement values ​​corresponding to the multiple target signals is less than or equal to a second threshold; The target measurement value is at least one of a reference signal received power (RSRP), a signal to interference plus noise ratio (SINR), and a reference signal received quality (RSRQ).

36. A random access device, characterized in that: include: A second processing module is configured to receive first information for random access sent by a terminal device, wherein a preamble carried by the first information is determined based on information of multiple target signals; A second sending module is used to send second information to the terminal device, where the second information is a random access response to the first information; a second receiving module, configured to receive third information sent by a terminal device, wherein the third information is a response to a target second information in the second information; A second operating module is configured to send fourth information to the terminal device, where the fourth information is response information to the third information; The information of the multiple target signals is different, and the information of the target signal is at least one of the following: an index of the target signal, a synchronization grid sync raster, frequency domain resources, time domain resources, a sequence format, quasi-co-location related parameters, a beam, a transmission configuration indication TCI, an associated transmitting and receiving point TRP, and an access point AP; The multiple target signals are determined by the terminal device based on a measurement result of measuring a downlink signal; and the target measurement values ​​corresponding to the multiple target signals meet at least one of the following preset conditions: The target measurement values ​​corresponding to the multiple target signals are greater than or equal to a first threshold; The difference between the multiple target measurement values ​​corresponding to the multiple target signals is less than or equal to a second threshold; The target measurement value is at least one of a reference signal received power (RSRP), a signal to interference plus noise ratio (SINR), and a reference signal received quality (RSRQ).

37. A terminal device, characterized in that: The method comprises a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the random access method according to any one of claims 1 to 25.

38. A network device, characterized in that: The method comprises a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the random access method according to any one of claims 26 to 34.

39. A readable storage medium, characterized in that The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the random access method according to any one of claims 1 to 25 are implemented; or the steps of the random access method according to any one of claims 26 to 34 are implemented.

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