Random access method, terminal and network side device

Abstract

The application discloses a random access method, a terminal and a network side device, and belongs to the technical field of communication. The random access method of the application comprises the following steps: a terminal performs random access based on random access resources associated with an on-demand reference signal; the random access resources associated with the on-demand reference signal are at least one of the following: random access resources associated with a first type SSB, the first type SSB is a periodically transmitted SSB; random access resources associated with an on-demand reference signal indicated by indication signaling; and random access resources associated with an on-demand reference signal configured by a network side device.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to a random access method, a terminal, and network-side equipment. Background Technology

[0002] In related technologies, network-side devices periodically broadcast Synchronization Signal Blocks (SSBs) and the random access resources associated with the SSBs through system information. Terminals can select a suitable SSB from the SSBs and the random access resources associated with the SSBs periodically broadcast by the network-side devices, and perform random access operations according to the random access resources associated with the SSB.

[0003] However, in current discussions of 6G network architecture, to achieve network energy efficiency, network-side equipment may trigger the transmission of SSBs, Channel State Information-Reference Signals (CSI-RS), or other reference signals on demand. In this case, the terminal can perform synchronization or measurement based on the on-demand triggered SSBs when random access is required, thereby selecting appropriate random access resources for random access.

[0004] Therefore, how the terminal can perform random access based on the reference signal triggered on demand is an urgent problem to be solved in this field. Summary of the Invention

[0005] This application provides a random access method, a terminal, and a network-side device, enabling the terminal to perform random access using random access resources associated with a reference signal triggered on demand.

[0006] In a first aspect, a random access method is provided, executed by a terminal, the method comprising: the terminal performing random access based on random access resources associated with an on-demand reference signal;

[0007] The random access resources associated with the aforementioned on-demand reference signal are at least one of the following:

[0008] The random access resources associated with the first type of SSB, which is a periodically sent SSB;

[0009] The random access resources associated with the on-demand reference signal indicated by the instruction signaling;

[0010] Random access resources associated with on-demand reference signals configured on network-side devices.

[0011] Secondly, a random access method is provided, executed by a network-side device, the method comprising: the network-side device indicating or configuring random access resources associated with an on-demand reference signal to a terminal;

[0012] The random access resources associated with the aforementioned on-demand reference signal are at least one of the following:

[0013] The random access resources associated with the first type of SSB, which is a periodically sent SSB;

[0014] The aforementioned network-side equipment indicates the random access resources associated with the on-demand reference signal indicated by the signaling.

[0015] The random access resources associated with the on-demand reference signals configured in the aforementioned network-side devices.

[0016] Thirdly, a random access apparatus is provided, the apparatus comprising: a processing module; the processing module being configured to perform random access based on random access resources associated with an on-demand reference signal;

[0017] The random access resources associated with the aforementioned on-demand reference signal are at least one of the following:

[0018] The random access resources associated with the first type of SSB, which is a periodically sent SSB;

[0019] The random access resources associated with the on-demand reference signal indicated by the instruction signaling;

[0020] Random access resources associated with on-demand reference signals configured on network-side devices.

[0021] Fourthly, a random access device is provided, the device comprising: a transmitting module; the transmitting module being configured to indicate or configure random access resources associated with an on-demand reference signal to a terminal;

[0022] The random access resources associated with the aforementioned on-demand reference signal are at least one of the following:

[0023] The random access resources associated with the first type of SSB, which is a periodically sent SSB;

[0024] The aforementioned network-side equipment indicates the random access resources associated with the on-demand reference signal indicated by the signaling.

[0025] The random access resources associated with the on-demand reference signals configured in the aforementioned network-side devices.

[0026] Fifthly, a random access device is provided, the device being configured to perform the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0027] In a sixth aspect, a terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0028] In a seventh aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is configured to perform random access based on random access resources associated with an on-demand reference signal;

[0029] The random access resources associated with the aforementioned on-demand reference signal are at least one of the following:

[0030] The random access resources associated with the first type of SSB, which is a periodically sent SSB;

[0031] The random access resources associated with the on-demand reference signal indicated by the instruction signaling;

[0032] Random access resources associated with on-demand reference signals configured on network-side devices.

[0033] Eighthly, a network-side device is provided, the network-side device including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0034] In a ninth aspect, a network-side device is provided, including a processor and a communication interface, wherein the communication interface is used to indicate or configure random access resources associated with on-demand reference signals to a terminal;

[0035] The random access resources associated with the aforementioned on-demand reference signal are at least one of the following:

[0036] The random access resources associated with the first type of SSB, which is a periodically sent SSB;

[0037] The aforementioned network-side equipment indicates the random access resources associated with the on-demand reference signal indicated by the signaling.

[0038] The random access resources associated with the on-demand reference signals configured in the aforementioned network-side devices.

[0039] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0040] Eleventhly, a wireless communication system is provided, comprising: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the method as described in the first aspect, and the network-side device can be used to perform the steps of the method as described in the second aspect.

[0041] In a twelfth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0042] In a thirteenth aspect, a computer program / program product is provided, the computer program / program product being stored in a storage medium, the computer program / program product being executed by at least one processor to implement the steps of the random access method as described in the first aspect, or to implement the steps of the method as described in the second aspect.

[0043] In this embodiment, the terminal performs random access based on the random access resources associated with the on-demand reference signal. The random access resources associated with the on-demand reference signal are at least one of the following: random access resources associated with a first type SSB, where the first type SSB is a periodically transmitted SSB; random access resources associated with the on-demand reference signal indicated by indication signaling; and random access resources associated with the on-demand reference signal configured by the network-side device. In this solution, the terminal can initiate random access on the random access resources associated with the on-demand reference signal to perform the random access procedure. Attached Figure Description

[0044] Figure 1 This is a schematic diagram illustrating the mapping relationship between SSB and RO provided in an embodiment of this application;

[0045] Figure 2 This is a schematic diagram illustrating the mapping relationship between SSB and RO provided in an embodiment of this application;

[0046] Figure 3 This is a schematic diagram of a possible communication system architecture provided in an embodiment of this application;

[0047] Figure 4 A flowchart illustrating a random access method provided in an embodiment of this application;

[0048] Figure 5A schematic diagram illustrating the mapping relationship between SSB and RO provided in this application embodiment;

[0049] Figure 6 A beam diagram of AO-SSB and OD-SSB provided for embodiments of this application;

[0050] Figure 7 A beam diagram of an OD-SSB provided in an embodiment of this application;

[0051] Figure 8 A schematic diagram of a multi-directional beamforming OD-SSB provided in an embodiment of this application;

[0052] Figure 9 This is a schematic diagram of the structure of a random access device provided in an embodiment of this application;

[0053] Figure 10 This is a schematic diagram of the structure of a random access device provided in an embodiment of this application;

[0054] Figure 11 This is a schematic diagram of the structure of a random access device provided in an embodiment of this application;

[0055] Figure 12 This is a schematic diagram of the structure of a random access device provided in an embodiment of this application;

[0056] Figure 13 This is a schematic diagram of the hardware structure of a communication device provided in an embodiment of this application;

[0057] Figure 14 A schematic diagram of the hardware structure of a terminal provided in an embodiment of this application;

[0058] Figure 15 This is a schematic diagram of the hardware structure of a network-side device provided in an embodiment of this application. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0060] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0061] The following explains the technologies involved in the embodiments of this application:

[0062] 1) Methods for terminal detection of SSB:

[0063] The terminal first detects the New Radio Primary Synchronization Signal (NR-PSS) to obtain a part of the physical cell identifier (ID), namely N(2)_ID; obtains the Orthogonal Frequency Division Multiplexing (OFDM) symbol timing and frequency synchronization; then detects the Secondary Synchronization Signal (SSS) to obtain the other part of the physical cell ID, namely N(1)_ID, and obtains the complete physical cell ID, namely the physical cell identifier.

[0064] Then the terminal detects the Physical Broadcast Channel (PBCH) and the Demodulation Reference Signal (DMRS) of the PBCH to obtain the System Frame Number and SSB Index, and further obtains the timing of the subframe.

[0065] In NR, the SSB period is configured in System Information Block 1 (SIB1), and can be 5ms, 10ms, 20ms, 40ms, 80ms, or 160ms. During initial access, if the terminal has not yet received SIB1, it will search for SSBs according to the default 20ms period. SSBs do not appear only once at regular intervals, but rather several times within a certain half-frame at regular intervals. This is designed for beam scanning. Each of these SSBs corresponds to a beam scanning direction, and ultimately there will be one SSB in each direction. These SSBs are called an SSB set, and all SSBs in an SSB set must be within the same half-frame.

[0066] 2) SSB transmission method in multi-carrier scenarios

[0067] Multicarrier operation is a typical operation in 5G (5th Generation Mobile Communication Technology) NR networks, used to enhance the capacity of network-side equipment. For primary cells (Pcell) or primary secondary cells (PScell), network-side equipment must send periodic SSBs, and the SSB period must be less than or equal to 20ms for a terminal to be successfully searched initially.

[0068] For Scells within the same intra-band, network-side devices can send SSBs, in which case SSB-related parameters are configured when adding the Scell; alternatively, they can not send SSBs, in which case SSB-related parameters are not configured when adding the Scell, and the terminal obtains timing through the SSB on the Pcell.

[0069] For Scells outside the frequency band (inter-band), the network-side device must send an SSB and configure the relevant SSB parameters when adding the Scell.

[0070] 3) Network energy efficiency in 3GPP R18 (3rd Generation Partnership Project Release 18) technical standards

[0071] Network energy efficiency is listed as one of the 13 performance requirements of IMT-2020. A significant portion of the power consumption in NR networks comes from network-side equipment, and within NR networks, 90% of the power consumption of network-side equipment originates from active antenna units (AAUs). Due to higher frequency bands, wider bandwidth, and more transceivers (TRXs), the power consumption of network-side equipment in a single NR network is currently 3 to 4 times higher than that of Long Term Evolution (LTE) network-side equipment. Furthermore, in terms of operating expenses (OPEX), electricity costs for network-side equipment account for nearly 20% of the total network operating costs. For some operators, electricity costs represent more than half of their total profits. Therefore, energy efficiency in NR networks is becoming increasingly critical for the significant success of 5G. Depending on the actual load, network-side equipment can implement different levels of energy-saving measures, such as shutting down network-side equipment, shutting down carriers or cells, shutting down channels, shutting down SSBs or beams, shutting down antennas or panels, discontinuous transmission (DTX) and / or discontinuous reception (DRX), CSI adaptation, etc.

[0072] 4) Mapping between the Physical Random Access Channel (PRACH) and the SSB

[0073] The configuration parameters for PRACH resources and SSB-Random Occasion (SSB-RO) are configured in System Information Block SIB1. In NR, a cell can configure multiple Frequency Division Multiplexing (FDM) PRACH ROs at a single time-domain location of a transmitted PRACH. At any given time, the number of FDM ROs that can be performed can be {1, 2, 4, 8}, determined by the higher-layer parameter msg1-FDM.

[0074] The random access preamble can only be transmitted on the time-domain resources configured by the PRACH configuration index and the frequency-domain resources configured by the msg1-FDM parameter. The PRACH frequency-domain resources n_RA ∈ {0, 1, ..., M-1}, where M equals the higher-layer parameter msg1-FDM. During initial access, the PRACH frequency-domain resources n_RA are numbered in ascending order starting from the lowest frequency RO resource within the initial active uplink bandwidth part; otherwise, the PRACH frequency-domain resources n_RA are numbered in ascending order starting from the lowest frequency RO resource within the active uplink bandwidth part. For example, in... Figure 1 In this context, the number of ROs in FDM at a given time is 8 (i.e., msg1-FDM=8). The RO resources are numbered sequentially from low to high frequency as RO#0 to RO#7.

[0075] In NR, there is an association between ROs and the actual SSBs being transmitted. ROs are associated with SSBs first in the frequency domain (e.g., from low to high frequency), and then in the time domain. An SSB may be associated with multiple consecutive ROs, or multiple SSBs may be associated with one RO. It should be noted that when multiple SSBs are associated with one RO, different SSBs correspond to different preambles. The ROs associated with an SSB are configured by the network-side device through the number of SSBs associated with each RO and the number of contention preambles allocated to each SSB (i.e., the parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB). For example, oneEighth represents one SSB associated with 8 consecutive ROs, and eight represents 8 SSBs associated with one RO. {n4,n8,n12,…} represents the number of preambles associated with each SSB on a RO. For example, n4 represents 4 preambles associated with each SSB on a RO, and n8 represents 4 preambles associated with each SSB on a RO.

[0076] After all SSBs in an SSB set have completed one round of association with the RO, they constitute an SSB-RO mapping cycle. An SSB-RO association period may contain one or more SSB-RO mapping cycles. An SSB-RO association pattern period may contain one or more SSB-RO association periods. The SSB-RO mapping repeats with the association pattern period as the cycle, and the maximum association pattern period is 160ms.

[0077] Typically, network-side equipment can use different beams to transmit different SSBs. The number of SSBs is configured via the `ssb-PositionsInBurst` parameter; for FR2, the maximum number of SSBs is 64. The terminal selects the RO (Relationship Target) or "RO and preamble combination" associated with the SSB with the strongest signal, based on the strength of the received downlink beam or SSB, and transmits `Msg1`. In this way, the network-side equipment can determine the SSB selected by the terminal based on the RO or "RO and preamble combination" of the received preamble. Then, it transmits `Msg2` on the corresponding downlink beam of the SSB to ensure the quality of downlink signal reception.

[0078] Combination Figure 1 ,by Figure 1 Taking the association between SSBs and ROs as an example, at any given time, there are 8 ROs in an FDM system, and 4 SSBs are actually transmitted: SSB#0, SSB#1, SSB#2, and SSB#3. Each SSB is associated with 2 ROs. If the terminal determines to send PRACH or Msg1 on the RO corresponding to SSB#0, then the terminal can select one RO from RO#0 and RO#1 to send the PRACH.

[0079] like Figure 2 As shown, with Figure 2 Taking the association between SSBs and ROs as an example, at a given time, the number of ROs in an FDM is 2, and the actual number of SSBs transmitted is 8, namely SSB#0, SSB#1, ..., SSB#7, with each pair of SSBs associated with one RO. When multiple SSBs share a single RO, the preamble sets associated with these multiple SSBs are different; that is, the same preamble cannot simultaneously belong to preamble sets associated with different SSBs. Figure 2 Taking RO#0 as an example, RO#0 has a total of 60 preambles, of which the preambles with indices 0 to 29 are associated with SSB#0, and the preambles with indices 30 to 59 are associated with SSB#1.

[0080] It should be noted that, Figure 1 and Figure 2 Each square in the diagram represents a RO (Relationship to RO), not an SSB (Self-Supporting SB). The SSB indicated by the symbol refers to which SSB(s) this RO is associated with.

[0081] Before sending PRACH, the terminal first selects an SSB with an RSRP higher than a threshold based on the received beam or SSB's Reference Signal Received Power (RSRP). If multiple SSBs have RSRPs higher than the threshold, the terminal can select any SSB with an RSRP higher than the threshold. If no SSB has an RSRP higher than the threshold, the terminal selects an SSB based on implementation.

[0082] Based on the network implementation (NW) configuration, the terminal obtains the mapping between SSBs and ROs. After selecting an SSB, the RO corresponding to the selected SSB is used as the RO for sending PRACH / Preamble / Msg1. If the selected SSB is associated with multiple ROs, the terminal can choose one of the ROs to send PRACH / Preamble / Msg1.

[0083] For example: in Figure 1 In the example shown, assuming the terminal selects SSB#1, the terminal can choose between RO#2 and RO#3 to send PRACH / Msg1; Figure 2 In the example shown, if the terminal selects SSB#1, it can choose the nearest available RO (RO#0 or 4) associated with SSB#1 to send PRACH / Msg1. Within the selected RO, the terminal selects a preamble from the preamble set associated with the selected SSB for PRACH transmission. Figure 2 In this context, if an RO is associated with two SSBs, then the available preamble set associated with each SSB in an RO will be divided into two subsets, each corresponding to one SSB. The terminal will select a preamble sequence from the preamble subset corresponding to the selected SSB for PRACH / Msg1 transmission.

[0084] 5) The time-domain unit involved in the embodiments of this application may be one or more symbols, time slots, radio subframes, radio frames, milliseconds (ms), seconds (s), and there are no restrictions in the embodiments of this application.

[0085] 6) On-Demand SSB (OD-SSB)

[0086] OD-SSB refers to the dynamic triggering of SSB or reference signal transmission based on network requirements or terminal requests.

[0087] Applicable scenarios:

[0088] Energy-saving network: Network-side devices only send SSB when requested by the terminal or during specific events (such as handover or beam recovery), reducing air interface resource usage and energy consumption.

[0089] In non-continuous coverage scenarios, such as industrial IoT or sparse user environments, SSB can be triggered on demand to reduce interference.

[0090] Dynamic beam management: Adjust the transmission period or beam direction of the SSB as needed for mobile terminals or beam tracking requirements.

[0091] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as the sender explicitly informing the receiver of specific information, the required operation, or the requested result in the instruction sent. An indirect instruction can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the required operation or requested result based on the judgment result.

[0092] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, 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), or other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0093] Figure 3This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can also be referred to as User Equipment (UE), and can be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipboard equipment, pedestrian user equipment (PUE), smart home devices (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game consoles, personal computers (PCs), ATMs, or self-service machines, etc. Wearable devices include: smartwatches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among these, in-vehicle devices can also be referred to as in-vehicle terminals, in-vehicle controllers, in-vehicle modules, in-vehicle components, in-vehicle chips, or in-vehicle units, etc. It should be noted that the specific type of terminal 11 is not limited in this application embodiment. Network-side equipment 12 may include access network equipment or core network equipment, wherein access network equipment may also be referred to as Radio Access Network (RAN) equipment, radio access network function, or radio access network unit. Access network equipment may include base stations, Wireless Local Area Network (WLAN) access points (APs), or Wireless Fidelity (WiFi) nodes, etc.Among them, base stations can be referred to as Node B (NB), Evolved Node B (eNB), Next Generation Node B (gNB), New Radio Node B (NR Node B), Access Point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B, Transmit / Receive Point (TRP), Non-Terrestrial Network (NTN) equipment (such as satellite or high altitude platform stations). The term "base station" can be any suitable term in the field, such as "station" or any other appropriate term in the relevant field, as long as the same technical effect is achieved. The term "base station" is not limited to specific technical terms. It should be noted that the embodiments of this application only use the base station in the NR system as an example for introduction, and do not limit the specific type of base station.

[0094] Core network equipment, also known as core network nodes, core network functions, or core network elements, includes, but is not limited to, at least one of the following: Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (or L-NEF), and Binding Support Function. Support Function (BSF), Application Function (AF), Location Management Function (LMF), Gateway Mobile Location Centre (GMLC), Network Data Analytics Function (NWDAF), and Non-Terrestrial Network (NTN) equipment (such as satellite or high altitude platform station).It should be noted that the embodiments of this application only use the core network equipment in the NR system as an example for introduction, and do not limit the specific type of core network equipment. If the name of the core network equipment mentioned in the embodiments of this application changes in subsequent protocol versions (e.g., 6G), it is also within the scope of protection of this application.

[0095] Optionally, the core network equipment can be implemented by one or more functional modules in a single device, or by multiple devices working together; this application does not specifically limit this. It is understood that the aforementioned functional modules can be network elements in hardware devices, software functional modules running on dedicated hardware, or virtualized functional modules instantiated on a platform (e.g., a cloud platform).

[0096] The random access method, terminal, and network-side equipment provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0097] It should be noted that in the random access method provided in this application embodiment, the RACH resource associated with OD-SSB can also be described as the RACH resource mapped by OD-SSB. Similarly, the RACH resource associated with AO-SSB is the RACH resource mapped by AO-SSB.

[0098] In the random access method provided in this application embodiment, the scenario in which the terminal uses OD-SSB to associate RACH resources to perform random access can include the following five scenarios.

[0099] Scenario 1: After the terminal performs an initial search based on OD-SSB, it initiates initial access based on the RACH resource associated with OD-SSB. At this time, the RACH resource can be temporarily activated or semi-static as OD-SSB is sent, or it can be statically configured and remain valid indefinitely.

[0100] Scenario 2: When the periodic SSB transmission period is long, after the RO resources are aggregated into a cluster, the terminal initiates uplink access on the RACH resources associated with the OD-SSB after measurement based on the OD-SSB, so as to reduce the RACH latency.

[0101] Scenario 3: SSBs in the Transmission and Reception Point (TRP) direction of certain beams are triggered on-demand. When a network-side device triggers an SSB in the TRP direction of these beams, it simultaneously triggers the RACH resources associated with these SSBs. One approach is to trigger additional RACH resources; another approach is to trigger a remapping of existing RACH resources so that RACH resources are associated with these SSBs.

[0102] Scenario 4: After the terminal detects a beam failure, it measures the beam quality of the candidate beams based on the OD-SSB. When the network-side device triggers the OD-SSB, it also triggers the RACH resource corresponding to the OD-SSB. The terminal can then initiate random access on the RACH resource corresponding to the selected new beam.

[0103] Scenario 5: When the network-side device configures the terminal with the measurement of candidate cells for Layer 1 mobility management, it triggers the terminal to perform fast measurement based on OD-SSB to quickly identify a better candidate cell for LTM (Lower Layer Triggered Mobility) handover. In order to perform RACH-less handover based on an already obtained TA during LTM handover, the network-side device can also configure the RACH resources associated with OD-SSB for the terminal when triggering OD-SSB, so that the terminal can perform early uplink synchronization (early UL sync) on these RACH resources.

[0104] Scenario 6: When the network-side device triggers the transmission of OD-SSB on different spatial characteristics or other frequency units during the random access process of the terminal, the terminal can perform the subsequent random access process on the RACH resource associated with this OD-SSB.

[0105] The execution subject of the random access method provided in this application embodiment can be a random access device. Exemplarily, the random access device can be an electronic device, or a functional component or entity within that electronic device. In this application embodiment, the electronic device can be a terminal; the following will use a terminal as the execution subject as an example to executor the random access method provided in this application embodiment.

[0106] Figure 4 This is a flowchart illustrating a random access method provided in some embodiments of this application, such as... Figure 4 As shown, some embodiments of this application provide a random access method that may include the following step 201.

[0107] Step 201: The terminal performs random access based on the random access resources associated with the on-demand reference signal.

[0108] In some embodiments of this application, the random access resources associated with the aforementioned on-demand reference signal are at least one of the following:

[0109] Random access resources associated with the first type of SSB;

[0110] The random access resources associated with the on-demand reference signal indicated by the instruction signaling;

[0111] Random access resources associated with on-demand reference signals configured on network-side devices.

[0112] In some embodiments of this application, the first type of SSB is an SSB that is periodically sent by the network-side device.

[0113] For example, the first type of SSB mentioned above can be understood as a continuously transmitted SSB (Always On-SSB, AO-SSB).

[0114] It should be noted that in the following embodiments, the first type SSB and AO-SSB have the same meaning.

[0115] In some embodiments of this application, the aforementioned on-demand reference signal is an on-demand triggered reference signal.

[0116] For example, the reference signal mentioned above can be SSB, CSI-RS, Low Power Synchronization Signal (LP-SS), or any other reference signal, and this application does not impose any restrictions.

[0117] For example, the above-mentioned on-demand reference signal can be understood as on-demand SSB (OD-SSB).

[0118] Optionally, in some embodiments of this application, the random access method provided in this application embodiment further includes step 201a, and the above step 201 can be implemented by the following step 201b.

[0119] Step 201a: The network-side device indicates or configures the random access resources associated with the on-demand reference signal to the terminal.

[0120] Step 201b: The terminal determines the random access resource associated with the on-demand reference signal provided by the network-side device.

[0121] In one possible embodiment, the random access resource associated with the on-demand reference signal is the random access resource associated with the first type of SSB. Essentially, the terminal determines the random access resource associated with the on-demand reference signal based on the mapping rules and the random access resource associated with the first type of SSB.

[0122] In one possible embodiment, the random access resource associated with the on-demand reference signal is the random access resource associated with the on-demand reference signal indicated by the indication signaling. Essentially, it is the random access resource provided by the terminal in the indication signaling sent by the network-side device that determines the random access resource associated with the on-demand reference signal.

[0123] For example, the aforementioned indication signaling may be Downlink Control Information (DCI), Medium Access Control Control Element (MAC CE) signaling, or RRC signaling, Non-Access Stratum (NAS) signaling, system messages, etc., and this application does not impose any restrictions.

[0124] In one possible embodiment, the random access resource associated with the on-demand reference signal is the random access resource associated with the on-demand reference signal configured by the network-side device. Essentially, the terminal determines the random access resource associated with the on-demand reference signal through the random access resource provided in the configuration information sent by the network-side device.

[0125] It should be noted that the above three possible embodiments can be executed individually or in combination of any two or more, depending on the actual usage requirements. This application does not impose any limitations on this. For example, the network-side device can provide the terminal with the random access resources associated with the AO-SSB through indication signaling. Then, the terminal determines the random access resources associated with the on-demand reference signal based on the mapping rules and the random access resources associated with the AO-SSB. As another example, the network-side device can provide the complete set of random access resources associated with the on-demand reference signal through configuration information, and then indicate the specific random access resources associated with certain on-demand reference signals through indication signaling.

[0126] In some embodiments of this application, the random access resource mentioned above includes at least one of the following: RO, preamble, preamble index, preamble index set, RO index, RO time-frequency domain position, and RO period.

[0127] For example, the aforementioned preamble index set includes at least one preamble index.

[0128] In some embodiments of this application, the random access resources associated with the on-demand reference signal are located within one or more frequency domain resources; the frequency domain resources include at least one of the following: frequency domain element, frequency domain subband, carrier, and bandwidth portion.

[0129] For example, OD-SSB is on the anchor carrier, while the associated RACH resources are on the non-anchor carrier.

[0130] For example, the OD-SSB is on one frequency domain segment, while the associated RACH resource is on another segment.

[0131] In some embodiments of this application, the random access resources associated with the above-mentioned on-demand reference signals are, under the condition of satisfying a first condition, valid random access resources.

[0132] Typically, in a Pcell configuration with LP-SS+SSB, an SSB is only sent after the terminal triggers the SSB via a wake-up signal (WUS), at which point the transmission of RO becomes meaningful. Alternatively, if the AO-SSB cycle is long and the RO is designed as a cluster for energy saving, and if a low-latency RACH based on OD-SSB is desired, a corresponding RO can be considered. In this case, to achieve network energy saving, the effectiveness of random access resources can be limited.

[0133] In some embodiments of this application, the first condition described above includes at least one of the following:

[0134] The difference between the time domain location of the random access resource associated with the on-demand reference signal and the time domain location of the terminal's first on-demand reference signal is no greater than the fourth threshold value;

[0135] The random access resources associated with the on-demand reference signal are activated; it can be understood that the random access resources associated with the on-demand reference signal need to be activated before they are valid. The random access resources associated with the on-demand reference signal are configured by the network-side equipment.

[0136] For example, the aforementioned "difference between the time-domain location of the random access resource associated with the on-demand reference signal and the time-domain location of the terminal's first on-demand reference signal" can be understood as the gap between the RACH resource and its associated OD-SSB, or the gap between the start position of the RACH resource and the start or end position of the OD-SSB. It can be understood that only RACH resources within a certain time-domain range of the OD-SSB are valid, thereby reducing the number of RACH resources detected by the network side.

[0137] In some embodiments of this application, the random access resources associated with the on-demand reference signal are activated after the first reference time or after time T1 has elapsed from the first reference time.

[0138] For example, the aforementioned first reference time may be the DCI indication time, or determined by the DCI indication time and the DCI indication offset, or the time when the cell handover command is received.

[0139] For example, the value of T in the above time T is an integer, which can be 0.

[0140] In some embodiments of this application, the time T mentioned above includes at least one of the following:

[0141] Processing time for instruction signaling;

[0142] Feedback time of instruction signaling;

[0143] The processing time for feedback of instruction signaling;

[0144] The time interval (gap) between the first reference time and the first available RACH resource is calculated after at least one of the following: instruction signaling processing time, instruction signaling feedback time, and instruction signaling feedback processing time.

[0145] In some embodiments of this application, the first reference time mentioned above is any one of the following:

[0146] The start time of transmission of the on-demand reference signal;

[0147] The moment when the terminal receives the fourth instruction information;

[0148] The time at which the terminal sends the fifth instruction message;

[0149] The moment when the terminal receives the first valid on-demand reference signal;

[0150] The time at which the candidate location for the first additional random access resource after the scheduled time is located;

[0151] The first time unit of the first cycle in which the scheduled time occurs;

[0152] The first time unit of the first cycle after the first cycle in which the scheduled time occurs.

[0153] For example, the aforementioned first cycle is at least one of the following: Inactive Discontinuous Reception (I-DRX) cycle, Connected Discontinuous Reception (C-DRX) cycle, SSB-RO mapping cycle, SSB-RO association cycle, SSB-RO association pattern cycle, and SI modification cycle. The SSB-RO mapping cycle can also be described as a PRACH mapping cycle, the SSB-RO association cycle can also be described as a PRACH association cycle, and the SSB-RO association pattern cycle can also be described as a PRACH association pattern cycle.

[0154] For example, the aforementioned time unit may refer to one of the following: symbol, time slot, subframe, half-frame, radio frame, paging frame, us, ms, s.

[0155] For example, the aforementioned first valid on-demand reference signal can be understood as the first on-demand reference signal received by the terminal that enables random access. For example, the random access resources associated with the aforementioned on-demand reference signal are activated after the on-demand reference signal begins transmission.

[0156] In some embodiments of this application, the predetermined time includes at least one of the following:

[0157] The start time of transmission of the first on-demand reference signal;

[0158] The moment when the terminal receives the fourth instruction information;

[0159] The time at which the terminal sends the fifth instruction message;

[0160] The moment when the terminal receives the first valid on-demand reference signal.

[0161] For example, the fourth instruction information described above is used to inform the terminal network-side device to send on-demand reference signals.

[0162] For example, the fifth instruction information mentioned above is used to request the network-side device to send an on-demand reference signal.

[0163] For example, the random access resources associated with the aforementioned on-demand reference signal are activated in the first slot of the next PRACH association period in the PRACH association period in which the terminal receives the instruction from the network side to send the on-demand reference signal.

[0164] For example, the random access resources associated with the aforementioned on-demand reference signal are activated starting from the first slot of the PRACH association period at the time when the terminal receives the on-demand reference signal sent by the network side.

[0165] For example, the random access resources associated with the aforementioned on-demand reference signal are activated at the beginning of the first paging frame of the PRACH association period in which the terminal receives the instruction from the network side to send the on-demand reference signal.

[0166] In some embodiments of this application, the random access resources associated with the on-demand reference signal are deactivated after the second reference time or after time T2 has elapsed from the second reference time.

[0167] In some embodiments of this application, the second reference time mentioned above is any one of the following:

[0168] The end time of transmission of the on-demand reference signal;

[0169] Deactivate the on-demand reference signaling reception time;

[0170] The time indicated by the network-side device;

[0171] The last time unit of the first cycle in which the last first on-demand reference signal is located;

[0172] The first time unit of the next first cycle in which the last first on-demand reference signal is located;

[0173] The moment when the random access procedure ends;

[0174] The moment after the terminal sends the feedback Msg4;

[0175] The moment when the terminal receives Msg5;

[0176] The moment when the terminal receives the Radio Resource Control (RRC) connection completion message;

[0177] The time after the terminal sends Msg1;

[0178] The timing of candidate cells for Layer 1 mobility management is determined in advance;

[0179] The moment after the terminal performs a cell handover operation;

[0180] The moment when the terminal receives the cell handover command;

[0181] First reference time.

[0182] It is understandable that the deactivation time is the time after a certain period of time from the first reference time.

[0183] For example, when the terminal's random access procedure ends, the subsequent RACH resource can be considered deactivated because there is no longer a need to perform a random access procedure based on the RACH resource. At this time, the RACH resource indicated by the network side may only be an aperiodic random access resource.

[0184] For example, RACH resources dynamically indicated by the network side are considered to be activated or valid after the indication, until the above deactivation conditions are met and they are considered to be invalid.

[0185] This embodiment proposes a method to determine the RACH resources associated with the OD-SSB, so that the terminal can determine the range of valid RACH resources based on the transmission of the OD-SSB, and thus perform uplink synchronization or uplink access only on these RACH resources. The network side does not need to perform detection on RACH resources outside the range, thereby helping to achieve network energy saving.

[0186] If only OD-SSB exists in the system, then RACH resources will not be used when no OD-SSB is being transmitted in the system. Therefore, network-side devices can avoid performing detection on these RACH resources, thereby saving energy.

[0187] If the AO-SSB cycle is long, the associated RO resources will be concentrated near the AO-SSB. When the OD-SSB is triggered, the RACH resources near the OD-SSB will be activated, thereby saving detection energy consumption on the network side.

[0188] When the relationship between OD-SSB and RACH resources has been pre-configured and the time-frequency domain positions of candidate RACH resources have been determined, it is only necessary to determine which candidate RACH resources are valid.

[0189] One approach is to determine the start and end times of the validity of the RACH resource, with the start time being the first reference time mentioned above and the end time being the second reference time mentioned above.

[0190] The starting time could be one of the following:

[0191] The indication time of OD-SSB;

[0192] The time unit of the first RACH resource after the OD-SSB indication time;

[0193] The moment when the terminal requests OD-SSB;

[0194] The time unit of the first RACH resource after the moment the terminal requests the OD-SSB;

[0195] The start time of OD-SSB transmission;

[0196] The time unit of the first RACH resource after the start time of OD-SSB transmission;

[0197] The time unit in which the first valid index of OD-SSB is located;

[0198] The time unit of the first RACH resource after the time unit of the first valid index of OD-SSB;

[0199] The first time unit of the OD-SSB burst containing the first valid index of the OD-SSB;

[0200] The time unit of the first RACH resource after the first time unit of the OD-SSB burst containing the first valid index of the OD-SSB;

[0201] The first time unit containing the Nth OD-SSB;

[0202] The time unit of the first RACH resource after the first time unit of the Nth OD-SSB;

[0203] The first time unit of the first cycle in which the preset time occurs;

[0204] The end time of the first cycle in which the preset time is located;

[0205] The first time unit of the next first cycle of the first cycle in which the preset time is located.

[0206] It is understood that the aforementioned preset time can be either the aforementioned predetermined time or the aforementioned start time.

[0207] The end time could be one of the following:

[0208] The deactivation time of OD-SSB;

[0209] The deactivation time of OD-SSB is at the end of the first cycle;

[0210] The deactivation time of OD-SSB is at the end of the next first cycle;

[0211] The moment after time Q following OD-SSB deactivation;

[0212] The last time unit of the first cycle in which the last OD-SSB is located, or the first or last time unit of the next first cycle;

[0213] The end time of the RACH validity period indicated by the network-side device. It can be understood as the deactivation time of the RACH resource.

[0214] It is understandable that, since the terminal needs to measure the OD-SSB again before selecting the RACH resource, the deactivation time of the RACH resource needs to be later than the deactivation time of the OD-SSB.

[0215] Another approach is to determine the start time and duration of validity of the RACH resource.

[0216] The starting time can be determined using the method described above.

[0217] The effective duration can consist of K first cycles or the length of one effective duration. The value of K, or the length of the effective duration, can be predefined by the protocol, preconfigured by the network-side device, configured by the network-side device, or indicated by the network-side device.

[0218] Optionally, the validity period can be reset with the transmission of OD-SSB. For example, the validity period is considered to have been updated after every L cycles of OD-SSB transmission to prevent the RACH resource from being prematurely deactivated while the OD-SSB is being transmitted for an extended period.

[0219] Optionally, the validity period can be terminated early as the OD-SSB is deactivated. For example, when the OD-SSB is deactivated early, the RACH resources can also be reactivated along with the OD-SSB, instead of waiting until the validity period ends, thereby achieving network energy saving.

[0220] Optionally, depending on the instructions or configuration on the network side, it can be determined whether the deactivation time of the RACH resource is determined based on the deactivation instruction or the validity period on the network side.

[0221] For example, the first information can be carried in at least one of the following ways:

[0222] The configuration information, along with the relevant OD-SSB configuration, is sent to the terminal along with the configuration information.

[0223] Instruct the terminal when OD-SSB is activated;

[0224] Carried by RRC, MAC CE, DCI or SIB.

[0225] It should be noted that the first reference time and the start time mentioned above can both be the valid time or the activation time of the RACH resource, and the second reference time and the end time mentioned above can both be the invalid time or the deactivation time of the RACH resource. It can be understood that the RACH resource is valid, or in other words, activated, between the first reference time and the second reference time, or between the start time and the end time.

[0226] In this way, within the activation period, the associated random access resources determined by the terminal can be guaranteed to be valid, thereby ensuring the success rate of the terminal executing random access.

[0227] In the random access method provided in this application embodiment, the terminal performs random access based on random access resources associated with an on-demand reference signal. The random access resources associated with the on-demand reference signal are at least one of the following: random access resources associated with a first type SSB, where the first type SSB is a periodically transmitted SSB; random access resources associated with an on-demand reference signal indicated by indication signaling; and random access resources associated with an on-demand reference signal configured by the network-side device. In this solution, the terminal can initiate random access on the random access resources associated with the aforementioned on-demand reference signal to execute the random access procedure.

[0228] The following three embodiments illustrate in detail the random access resources associated with the on-demand reference signal in the random access method.

[0229] Example 1: The random access resources associated with the above-mentioned on-demand reference signal are the random access resources associated with the first type of SSB.

[0230] In some embodiments of this application, the random access resources associated with the first type of SSB mentioned above include at least one of the following:

[0231] The first SSB index maps some or all of the random access resources;

[0232] The second SSB index maps some or all of the random access resources.

[0233] In some embodiments of this application, the first SSB index is an index of a first type of SSB that is the same as the index of the first on-demand reference signal.

[0234] For example, when the random access resources associated with the first type of SSB are some or all of the random access resources mapped by the first SSB index, it indicates that the SSB index of the AO-SSB corresponds one-to-one with the SSB index of the OD-SSB. In this case, the OD-SSB is considered to be some additional AO-SSBs sent, applicable when the OD-SSB and AO-SSB have completely identical spatial domain designs. In other words, some or all of the RACH resources mapped by the AO-SSB index (which is the same as the OD-SSB index) are the RACH resources associated with the OD-SSB index.

[0235] For example, the random access resources associated with OD-SSB#1 are some or all of the random access resources mapped by AO-SSB#1, and the random access resources associated with OD-SSB#2 are some or all of the random access resources mapped by AO-SSB#2.

[0236] In some embodiments of this application, the second SSB index is an index of a first type SSB that is quasi-co-located with the first on-demand reference signal.

[0237] For example, when the random access resources associated with the first type of SSB are part or all of the random access resources mapped by the second SSB index, there are generally two scenarios: one is that the indices of the OD-SSB and AO-SSB are not in one-to-one correspondence, for example, OD-SSB index #1 and AO-SSB index #2 are quasi-co-located; the other is that the AO-SSB has a wider beam, so there may be multiple OD-SSB indices that are quasi-co-located to one AO-SSB, for example, the OD-SSB is some narrow beams under the AO-SSB beam. In this case, part or all of the RACH resources mapped by the AO-SSB index that is quasi-co-located with the OD-SSB index are the RACH resources associated with that OD-SSB index.

[0238] For example, the random access resources associated with OD-SSB#1 are some or all of the random access resources mapped to its quasi-co-located AO-SSB#1.

[0239] In some embodiments of this application, the SSB corresponding to the second SSB index is quasi-co-located with a plurality of first on-demand reference signals.

[0240] For example, if OD-SSB#1, OD-SSB#2, and OD-SSB#3 are all quasi-co-addressed to AO-SSB#1, then the random access resources associated with OD-SSB#1, OD-SSB#2, and OD-SSB#3 are some or all of the random access resources mapped by AO-SSB#1.

[0241] In some embodiments of this application, the first on-demand reference signal is one of the on-demand reference signals, that is, the on-demand reference signal of a specific index.

[0242] In some embodiments of this application, some or all of the random access resources associated with the first on-demand reference signal in the random access resources mapped by the second SSB index are determined based on at least one of the following:

[0243] The order of the indices of multiple first-on-demand reference signals;

[0244] The resource range of random access resources associated with the second SSB index as specified in the agreement or indicated by the signaling.

[0245] For example, when more than one OD-SSB quasi-co-addresses to an AO-SSB index, the RACH resource associated with the OD-SSB index satisfies at least one of the following:

[0246] The RACH resources associated with the OD-SSB index are linked to N consecutive RACH resources associated with the AO-SSB index in ascending order of index number.

[0247] The RACH resource range or RACH resource rule associated with the OD-SSB index can be indicated by DCI, i.e., as specified in the above protocol or indicated by instruction signaling.

[0248] For example, the value of N in the aforementioned N consecutive RACH resources can be predefined by the protocol, preconfigured by the network-side device, configured by the network-side device, indicated by the network-side device, determined by the terminal itself, or evenly distributed according to the number of OD-SSBs associated with AO-SSBs and the number of RACH resources. For example, OD-SSB index#0 to OD-SSB index#3 are quasi-co-addressable with AO-SSB index#0. When AO-SSB index#0 is associated with RO#0 to RO#7, according to the order of the OD-SSB indexes, OD-SSB index#0 is associated with RO#0 to RO#1, OD-SSB index#1 is associated with RO#2 to RO#3, and so on. For example, OD-SSB index #0 to OD-SSB index #3 and AO-SSB index #0 are quasi-co-addressable. When AO-SSB index #0 is associated with RO #0 to RO #7, and each RO has 64 available preambles, according to the order of the OD-SSB indexes, OD-SSB index #0 is associated with preambles #0 to #15 in RO #0 to RO #7, OD-SSB index #1 is associated with preambles #16 to #31 in RO #0 to RO #7, and so on.

[0249] In some embodiments of this application, the terminal can map the random access resources associated with the AO-SSB to the random access resources associated with the OD-SSB based on mapping rules, so as to obtain the random access resources associated with the on-demand reference signal mentioned above.

[0250] For example, the mapping rules mentioned above can be custom-defined, indicated by signaling sent by the network-side device, configured by the network-side device, or agreed upon by the protocol.

[0251] This embodiment proposes a method for determining the RACH resource associated with the OD-SSB, enabling the terminal to perform uplink synchronization or uplink access based on the RACH resource after performing downlink synchronization or measurement based on the OD-SSB, thus contributing to network energy saving. Specifically, the mapping rules between AO-SSB and RO are as follows.

[0252] First, assume that the network-side devices have already configured the mapping rules between AO-SSB and RO, such as Figure 5 As shown, RO#0 and RO#1 are associated with SSB#0, RO#2 and RO#3 are associated with SSB#1, RO#4 and RO#5 are associated with SSB#2, and RO#6 and RO#7 are associated with SSB#3.

[0253] like Figure 6As shown, when the beam directions of OD-SSB and AO-SSB are exactly the same, OD-SSB can be considered as additional AO-SSBs transmitted. In this case, the mapping relationship between OD-SSB and RO can reuse the mapping relationship of AO-SSB, or it can be understood that SSBs associated with RO do not need to be distinguished as either OD-SSB or AO-SSB. For example, if the terminal measures that the quality of OD-SSB#1 exceeds a threshold, then according to... Figure 5 The mapping relationship shown allows you to select RO#2 or RO#3 to perform uplink synchronization or uplink access.

[0254] like Figure 7 As shown, when the spatial design parameters of the OD-SSB are not exactly the same as those of the AO-SSB, for example, when OD-SSB indexes #0 to #3 are all quasi-co-addressed to AO-SSB index #2, the RACH resources associated with the OD-SSB should be part or all of the RACH resources mapped by its quasi-co-addressed AO-SSB index. That is, regardless of which OD-SSB the terminal selects, it can only access resources from... Figure 5 The RO#4 or RO#5 shown indicates that an uplink synchronization or uplink access is initiated.

[0255] Combination Figure 7 As shown, to further distinguish which OD-SSB is associated with the RACH resource, further mapping is needed within the RACH resource mapped by AO-SSB#2. Several possible methods are as follows:

[0256] Method 1: Differentiate by using different RO indexes.

[0257] For example, this can be applied when the number of ROs associated with an AO-SSB is greater than or equal to the maximum number of OD-SSBs quasi-co-addressable to the same AO SSB. For instance, when OD-SSB#0 and OD-SSB#1 are quasi-co-addressable to AO-SSB#0, OD-SSB#0 is mapped to RO#0, and OD-SSB#1 is mapped to RO#1.

[0258] Method 2: Differentiate by using different preambles.

[0259] For example, when OD-SSB#0 and OD-SSB#1 are quasi-co-addressed to AO-SSB#0, OD-SSB#0 is mapped to the first half of the AO-SSB#0 associated preamble, and OD-SSB#1 is mapped to the first half of the AO-SSB#1 associated preamble.

[0260] Method 3: Differentiate by using different ROs and preambles.

[0261] For example, this method can be applied when the number of ROs associated with an AO-SSB is less than the maximum number of OD-SSBs quasi-co-addressable to the same AO SSB. For instance, when OD-SSB indexes #0 to #3 are all quasi-co-addressable to AO-SSB index #2, OD-SSB #0 maps to the first half of the preamble of RO #4 associated with AO-SSB #2, OD-SSB #1 maps to the second half of the preamble of RO #4 associated with AO-SSB #2, OD-SSB #2 maps to the first half of the preamble of RO #5 associated with AO-SSB #2, and OD-SSB #3 maps to the second half of the preamble of RO #5 associated with AO-SSB #2. It is understood that method 3 can also be applied when the number of ROs is greater than or equal to the number of OD-SSBs; this application does not limit this application.

[0262] In this way, the terminal can determine the random access resources associated with the on-demand reference signal according to the mapping rules agreed upon by the network-side equipment or protocol, so that the terminal can use these random access resources to perform random access operations.

[0263] Example 2: The random access resources associated with the above-mentioned on-demand reference signal are the random access resources associated with the on-demand reference signal indicated by the indication signaling.

[0264] Optionally, in some embodiments of this application, the random access method provided in this application embodiment further includes step 301.

[0265] Step 301: The terminal receives the instruction signaling sent by the network-side device.

[0266] In some embodiments of this application, the random access resources associated with the on-demand reference signal can be random access resources dynamically indicated by indication signaling.

[0267] In some embodiments of this application, the aforementioned instruction signaling may be DCI signaling, MAC CE signaling, RRC signaling, NAS signaling, system messages, etc., and this application does not impose any restrictions.

[0268] Optionally, in some embodiments of this application, the random access method provided in this application embodiment further includes step 301a, and the above step 301 can be implemented by the following step 301b.

[0269] Step 301a: The network-side device sends an instruction signaling to the terminal.

[0270] Step 301b: The terminal receives an indication signaling sent from the network-side device.

[0271] In some embodiments of this application, the above-described instruction signaling indicates at least one of the following:

[0272] Third SSB index;

[0273] The random access resources associated with the third SSB index;

[0274] Time-frequency domain resources of random access resources associated with on-demand reference signals;

[0275] Physical random access channel configuration index;

[0276] First offset value.

[0277] For example, the aforementioned third SSB index is an index of the first type of SSB, or an index of an on-demand reference signal.

[0278] For example, the aforementioned indication signaling can be used to indicate the signal type of the SSB corresponding to the aforementioned third SSB index.

[0279] For example, the signal types mentioned above include periodically transmitted signal types, such as AO-SSB, and on-demand reference signal types, such as OD-SSB.

[0280] For example, where the above indication signaling can be used to indicate the signal type of the SSB corresponding to the third SSB index, the indication signaling can explicitly indicate the type of the SSB, such as a 1-bit indication.

[0281] For example, where the above-mentioned indication signaling can be used to indicate the signal type of the SSB corresponding to the third SSB index, the indication signaling can implicitly indicate the type of SSB, for example, by determining it through the associated SSB configuration, RACH resource configuration, measurement configuration, etc.

[0282] For example, the above SSB configuration includes at least one of the following: SSB period, time-frequency domain position, transmission power, subcarrier spacing (SCS), number of transmissions, etc.

[0283] For example, when the above indication signaling is DCI or MAC CE, DCI can directly indicate the time-frequency domain resource location of RO, and can also indicate the preamble available in RO.

[0284] For example, when the DCI indicates the OD-SSB index, i.e. the third SSB index mentioned above, it may simultaneously indicate the associated RACH resource.

[0285] In some embodiments of this application, the random access resources associated with the on-demand reference signal indicated by the above-mentioned indication signaling include at least one of the following:

[0286] Random access resources determined based on the time-frequency domain location of the first target;

[0287] Random access resources determined based on the first offset value and the time-frequency domain location of the first target;

[0288] The random access resources indicated by the Physical Random Access Channel Configuration Index;

[0289] Random access resources that do not overlap with random access resources associated with Type 1 SSBs;

[0290] The random access resources associated with the third SSB index.

[0291] In some embodiments of this application, the time-frequency domain location of the first target is at least one of the following:

[0292] The time-frequency domain location of the random access resources associated with the first type of SSB;

[0293] The time-frequency domain location of the random access resource associated with the on-demand reference signal;

[0294] The time-frequency domain location of the random access resource indicated by the Physical Random Access Channel Configuration Index;

[0295] The time-frequency domain location of the terminal's first on-demand reference signal.

[0296] In some embodiments, the terminal determines the random access resource associated with the first target time-frequency domain location as the random access resource associated with the on-demand reference signal.

[0297] For example, the terminal determines the mapped RO, i.e. the "first target time-frequency domain location" in the first target time-frequency domain location mentioned above, based on the SSBindex indicated by the network-side device, and then performs uplink access with the indicated preamble index.

[0298] For example, the network side directly indicates the time-frequency domain location of the RACH resource associated with the OD-SSB, optionally including at least one of the following: radio frame number, slot number, period, and start symbol. For example, slot #2 on radio frame #5, with start symbol #0. Another example is which slots on which radio frames within the current first period. It is understood that the frequency domain location or relative frequency domain location of the RACH resource also needs to be indicated at this time.

[0299] In some embodiments, the terminal determines the random access resource associated with the time-frequency domain location after calculating the first offset value of the first target time-frequency domain location as the random access resource associated with the on-demand reference signal.

[0300] For example, the first offset value mentioned above can be: frame-level offset, subframe-level offset, or slot-level offset. For instance, the network side indicates the start symbol of the RO in the slot Xms after the location of the OD-SSB. It is understood that at this time, it is also necessary to indicate the frequency domain position or relative frequency domain position of the RACH resource.

[0301] In some embodiments, the terminal retrieves the corresponding random access resource based on the physical random access channel configuration index and identifies the random access resource as the random access resource associated with the aforementioned on-demand reference signal.

[0302] For example, the terminal determines, by looking up the predefined PRACH configuration table, whether the random access resource indicated by the index is the random access resource associated with the aforementioned on-demand reference signal or a candidate random access resource, based on the indicated physical random access channel configuration index.

[0303] In some embodiments, after the terminal obtains the random access resources associated with the first type of SSB, it determines the random access resources that do not overlap with the random access resources associated with the first type of SSB as the random access resources associated with the on-demand reference signal based on all currently known random access resources.

[0304] For example, the terminal determines the random access resources indicated by the index by looking up a predefined PRACH configuration table according to the indicated physical random access channel configuration index, excludes the random access resources that belong to the first type of SSB, and the remaining random access resources are the random access resources associated with the on-demand reference signal mentioned above.

[0305] In some embodiments, the terminal directly identifies the random access resource associated with the third SSB index indicated in the indication signaling as the random access resource associated with the aforementioned on-demand reference signal.

[0306] For example, the terminal determines the RO based on the SSB index indicated by the network-side device and the pre-configured or pre-defined SSB-RO mapping rules, and simultaneously determines the available preamble, i.e., the random access resource associated with the aforementioned on-demand reference signal. In this case, the SSB index indicated by the network-side device may be the index of an OD-SSB or the index of an always-on SSB. The network-side device can explicitly indicate the SSB type, for example, using an additional indication field; or implicitly indicate the SSB type, for example, by configuring the configuration associated with the SSB index indicated by the network-side device or other information to distinguish the SSB type.

[0307] For example, in the case where the random access resources associated with the aforementioned third SSB index include at least one of the RO index and preamble index or index group.

[0308] When uplink transmission is performed in the FR1 band, the network-side device can simply indicate the OD-SSB index and preamble. The terminal can then determine how to perform uplink access based on this information, because the network-side device knows which OD-SSB index was ultimately selected.

[0309] Optionally, the RACH resource indicated by the network-side device is a dedicated resource allocated to OD-SSB. This resource can be temporarily valid because the network-side device can determine whether it is based on AO-SSB or OD-SSB, and the specific index, by combining the terminal's uplink access process with the measurement results previously reported by the terminal.

[0310] Optionally, the preamble indicated by the aforementioned network-side device may be a preamble for performing Contention-Free Random Access (CFRA).

[0311] In some embodiments, the indication signaling sent by the network-side device can also directly indicate the range of the Preamble to indicate the RACH resource associated with the OD-SSB. In this case, the indication signaling sent by the network-side device also needs to indicate the time-frequency domain location or range of the RO.

[0312] In some embodiments of this application, after the terminal performs a measurement based on the OD-SSB, the network-side device instructs the terminal on the specific RACH resources used for uplink access or uplink synchronization based on the measurement results. It is understood that the network-side device indicates that the SSB and RACH resources indicated by the signaling are valid; otherwise, they are considered invalid.

[0313] In this way, the terminal can determine the random access resource associated with the on-demand reference signal based on the random access resource explicitly or implicitly indicated in the indication signaling, and thus perform random access.

[0314] Example 3: The random access resources associated with the above-mentioned on-demand reference signals are the random access resources associated with the on-demand reference signals configured by the network-side devices.

[0315] Optionally, in some embodiments of this application, the random access method provided in this application embodiment further includes step 401.

[0316] Step 401: The terminal receives configuration information sent by the network-side device.

[0317] In some embodiments of this application, the above configuration information is used to configure the random access resources associated with the on-demand reference signal.

[0318] Optionally, in some embodiments of this application, the random access method provided in this application embodiment further includes step 401a, and the above step 401 can be implemented by the following step 401b.

[0319] Step 401a: The network-side device sends configuration information to the terminal.

[0320] Step 401b: The terminal receives configuration information sent from the network-side device.

[0321] In some embodiments of this application, the above configuration information includes at least one of the following:

[0322] Fourth SSB index;

[0323] The random access resources associated with the fourth SSB index;

[0324] Time-frequency domain resources of random access resources associated with on-demand reference signals;

[0325] Physical random access channel configuration index;

[0326] Second offset value;

[0327] The third offset value of the wireless frame position;

[0328] Subframe number;

[0329] Start symbol;

[0330] Random access resource configuration cycle;

[0331] On-demand reference signal mapping period to RO;

[0332] The correlation period between the reference signal and RO;

[0333] The period of the correlation pattern between the reference signal and RO on demand.

[0334] For example, the fourth SSB index mentioned above is an index of the first type of SSB, or an index of an on-demand reference signal.

[0335] In some embodiments of this application, the random access resources associated with the on-demand reference signal configured by the network-side device described above include at least one of the following:

[0336] Random access resources determined based on the time-frequency domain location of the second target;

[0337] Random access resources determined based on the first offset value and the time-frequency domain location of the second target;

[0338] The random access resources indicated by the Physical Random Access Channel Configuration Index;

[0339] Random access resources that do not overlap with random access resources associated with Type 1 SSBs;

[0340] The random access resources associated with the fourth SSB index;

[0341] Time-frequency domain resources of random access resources associated with on-demand reference signals;

[0342] Random access resources determined based on the third offset value of the radio frame location;

[0343] Random access resources determined based on subframe sequence number;

[0344] Random access resources determined by the start symbol;

[0345] Random access resources are determined based on the random access resource configuration period.

[0346] In some embodiments of this application, the time-frequency domain location of the second target is at least one of the following:

[0347] The time-frequency domain location of the random access resources associated with the first type of SSB;

[0348] The time-frequency domain location of the random access resource associated with the on-demand reference signal;

[0349] The time-frequency domain location of the random access resource indicated by the Physical Random Access Channel Configuration Index;

[0350] The time-frequency domain location of the terminal's first on-demand reference signal.

[0351] In some embodiments, the terminal can directly use the random access resources configured in the configuration information as the random access resources associated with the on-demand reference signal. For example, at least one of the following: subframe number; start symbol; random access resource configuration period; mapping period between on-demand reference signal and RO; association period between on-demand reference signal and RO; association pattern period between on-demand reference signal and RO; random access resources associated with the fourth SSB index; time-frequency domain resources of the random access resources associated with the on-demand reference signal; and physical random access channel configuration index.

[0352] In some embodiments, the terminal determines the random access resource associated with the on-demand reference signal based on configuration parameters such as the second offset value and the third offset value of the radio frame position configured in the configuration information.

[0353] In one embodiment, the RACH resources associated with the OD-SSB and the RACH resources associated with the AO-SSB are independent and can be configured by the network-side device using the above configuration information.

[0354] Specifically, at least one of the following can be configured: subframe number; start symbol; random access resource configuration period; mapping period between on-demand reference signal and RO; association period between on-demand reference signal and RO; association pattern period between on-demand reference signal and RO; random access resource associated with the fourth SSB index; time-frequency domain resource of random access resource associated with on-demand reference signal; and physical random access channel configuration index.

[0355] In some embodiments of this application, when the terminal does not receive the AO-SSB, the mapping rules between the OD-SSB and the RACH resources reuse the mapping rules agreed upon by the legacy protocol. That is, after receiving the configuration information, the terminal maps the random access resources contained in the configuration information to the OD-SSB to obtain the random access resources associated with the OD-SSB.

[0356] It should be noted that the first reference time and the start time mentioned above can both be the valid time or the activation time of the RACH resource, and the second reference time and the end time mentioned above can both be the invalid time or the deactivation time of the RACH resource. It can be understood that the RACH resource is valid, or in other words, activated, between the first reference time and the second reference time, or between the start time and the end time.

[0357] In this way, the terminal can determine the random access resources associated with the on-demand reference signal based on the parameters configured in the configuration information, and thus perform random access.

[0358] It should be noted that each of the above method embodiments, or various possible implementations of each method embodiment, can be executed individually or in combination of any two or more. The specific implementation can be determined according to actual usage requirements, and this application embodiment does not impose any restrictions on this.

[0359] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signal described above may also be additional random access resources.

[0360] In some embodiments of this application, the aforementioned additional random access resources can be understood as random access resources that are not within the configuration range and are indicated by the network side.

[0361] In some embodiments of this application, the aforementioned additional random access resources are dynamically activated random access resources.

[0362] In some embodiments of this application, the aforementioned additional random access resources are pre-configured on the network side, but need to be dynamically activated / deactivated.

[0363] In other words, when the terminal needs to use OD-SSB, this part of the random access resources is dynamically activated; at other times, this part of the random access resources is deactivated or in an invalid state.

[0364] Understandably, additional RACH resources are typically considered for activation in the following situations.

[0365] Scenario 1: OD-SSBs are all quasi-co-addressable on the same SSB index. In this case, it is necessary to distinguish between OD-SSBs, but the RO resources corresponding to AO-SSBs are insufficient to distinguish the index of OD-SSBs, or the conflict will be more serious.

[0366] Scenario 2: After the RO cluster, there may be a long time between OD-SSB and RO. Therefore, it is considered that the activation of OD-SSB will be associated with additional RACH resources.

[0367] In some embodiments of this application, the aforementioned additional random access resources are associated with both the first type of SSB and the on-demand reference signal.

[0368] For example, when an additional RACH resource is associated with both AO-SSB and OD-SSB, all additional RACH resources are associated with both AO-SSB and OD-SSB.

[0369] Optionally, the additional RACH resources mentioned above are allocated to the terminal by DCI 1-0.

[0370] In some embodiments of this application, the additional random access resources described above are only associated with on-demand reference signals.

[0371] For example, when an additional RACH resource is associated with both AO-SSB and OD-SSB, at least some additional RACH resources are associated with only OD-SSB.

[0372] For example, at least some of the ROs in an additional RACH resource are associated only with OD-SSB, or at least some of the preambles are associated only with OD-SSB, while the rest may be associated with both OD-SSB and AO-SSB, or only with AO-SSB. For instance, the network side may indicate additional ROs #0 to #7, where ROs #0 to #3 are associated with both OD-SSB and AO-SSB, and ROs #4 to #7 are associated only with OD-SSB. Another example is that the network side may indicate additional ROs #0 to #7, where the first 32 preambles of these additional ROs are shared by OD-SSB and AO-SSB, while the latter 32 preambles are associated only with OD-SSB.

[0373] Understandably, when OD-SSB is activated, only the additional RACH resources associated with OD-SSB are activated.

[0374] It should be noted that if an additional RACH resource is only associated with an OD-SSB, and this additional RACH resource overlaps with the additional RACH resource associated with the AO-SSB, then either the additional RACH resource associated with the OD-SSB or the additional RACH resource associated with the AO-SSB is invalid.

[0375] In some embodiments of this application, additional random access resources are activated when a second condition is met.

[0376] In some embodiments of this application, the second condition described above includes at least one of the following:

[0377] The on-demand reference signal is activated;

[0378] The terminal receives information indicating the activation of additional random access resources associated with the on-demand reference signal;

[0379] At least two terminals quasi-co-address their first on-demand reference signals to the same first type SSB;

[0380] The number of random access resources associated with the first type of SSB is less than the first threshold value;

[0381] The number of terminals requesting on-demand reference signals exceeds the second threshold.

[0382] The multicast signaling indicates the activation of the on-demand reference signal;

[0383] The on-demand reference signal is independent of the random access resources associated with the Type 1 SSB;

[0384] The congestion level of the random access resources associated with the first type of SSB is greater than the third threshold.

[0385] For example, the above "on-demand reference signal is activated" can be understood as activating the on-demand reference signal, which activates the associated random access resource. Furthermore, it can also be understood as enabling new OD-SSB indexes. These SSB indexes are dynamically activated or deactivated, while others are enabled by default. That is, OD-SSB can be a complete burst, a partial burst, or at least a portion of the unenabled portion of AO-SSB.

[0386] For example, the information received by the terminal indicating the activation of additional random access resources associated with the on-demand reference signal can be carried in the first signaling.

[0387] It should be noted that the first threshold, the second threshold, and the third threshold mentioned above can be determined by agreement or can be set by custom; this application does not impose any restrictions.

[0388] It is understandable that as long as at least one, or any one, of the second conditions above is met, the additional random access resources will be activated, and the terminal can identify these random access resources as the random access resources associated with the OD-SSB.

[0389] Furthermore, the random access method provided in this application embodiment also includes step 501.

[0390] Step 501: The terminal receives the first signaling.

[0391] In some embodiments of this application, the first signaling includes information indicating the activation of additional random access resources associated with the first on-demand reference signal and information indicating the activation of the first on-demand reference signal.

[0392] For example, the first signaling mentioned above can be DCI signaling, MAC CE signaling, RRC signaling, NAS signaling, system message, etc., and this application does not impose any restrictions.

[0393] Optionally, in some embodiments of this application, the random access method provided in this application embodiment further includes step 501a, and the above step 501 can be implemented by the following step 501b.

[0394] Step 501a: The network-side device sends the first signaling to the terminal.

[0395] Step 501b: The terminal receives the first signaling sent from the network-side device.

[0396] In another embodiment, the terminal may also receive first signaling and second signaling at the same time.

[0397] The first signaling and the second signaling mentioned above respectively include information indicating the activation of additional random access resources associated with the first on-demand reference signal and information indicating the activation of the first on-demand reference signal.

[0398] For example, the second signaling mentioned above can be DCI signaling, MAC CE signaling, RRC signaling, NAS signaling, system message, etc., and this application does not impose any restrictions.

[0399] It should be noted that the activation and deactivation times of the aforementioned additional random access resources can be referenced to the first and second reference times mentioned above, and will not be repeated here.

[0400] This embodiment proposes a scheme for associating OD-SSB with additional RACH resources. This allows the terminal to initiate uplink synchronization or uplink access on additional RACH resources after synchronization or measurement based on OD-SSB. This enables the network to detect only a smaller number of RACH resources when there is no OD-SSB transmission, thus contributing to network energy saving. Specifically, the application scenarios for activating OD-SSB association with additional RACH resources can be described below.

[0401] Application Scenario 1: OD-SSBs are all quasi-co-addressable on the same SSB index. In this case, it is necessary to distinguish between OD-SSBs, but the RO resources corresponding to AO-SSBs are insufficient to distinguish the indexes of OD-SSBs, or the conflicts will be more serious.

[0402] Application Scenario 2: After RO clustering, the time between OD-SSB and RO may be long, so consider that the activation of OD-SSB will be associated with additional RACH resources.

[0403] Application Scenario 3: Some beams that are not allowed to co-address with AO-SSB are enabled by OD-SSB, so consider configuring additional RACH resources to map to these OD-SSBs.

[0404] For example, the configuration method of Additional RACH resources can reuse the configuration method of common (normal) RACH resources, and then configure additional RACH resources with different RACH configurations, for example, by indicating different PRACH configuration indexes or offsets relative to the time domain or frequency domain position of normal RACH resources through indication signaling.

[0405] For example, when an Additional RACH resource is associated with both AO-SSB and OD-SSB, the network-side device pre-configures or instructs the RO resources or preamble resources mapped by OD-SSB and AO-SSB respectively.

[0406] Optionally, all SSBs associated with additional RACH resources can be mapped to additional RACH resources in a certain order.

[0407] For example, suppose there are 8 ROs, 4 OD-SSBs and 4 AO-SSBs. When each SSB is associated with 1 RO, the ROs can be mapped in the order of OD-SSB first and then AO-SSB, or AO-SSB first and then OD-SSB.

[0408] Optionally, the OD-SSB and AO-SSB associated with the additional RACH resource can be mapped to the additional RACH resource in a certain order.

[0409] For example, these 8 ROs are mapped to both 4 OD-SSBs and 4 AO-SSBs, meaning that one SSB index maps to 2 ROs. To distinguish between OD-SSBs and AO-SSBs, different preambles can be used.

[0410] For example, when an additional RACH resource is associated only with an OD-SSB, the network-side device pre-configures or indicates which OD-SSBs are associated with the additional RACH resource.

[0411] Optionally, additional RACH resources can be associated with all OD-SSBs. The mapping rules can reuse the SSB-RO mapping rules already configured on the network side, or the network side devices can independently configure SSB-RO mapping rules to associate OD-SSBs and additional RACH resources.

[0412] Optionally, additional RACH resources may only be associated with a portion of OD-SSBs, such as the OD-SSB of a newly transmitted beam direction, thus not affecting the existing SSB-RO mapping relationship.

[0413] It should be noted that whether Additional RACH resources are associated only with OD-SSB, or with both AO-SSB and OD-SSB, is determined by the protocol pre-definition, network-side device pre-configuration, network-side device configuration, or network-side device indication.

[0414] For example, a network-side device configures additional RACH resource mapping to OD-SSB when at least one of the following conditions is met:

[0415] Condition 1: The AO-SSB beam cannot cover the OD-SSB beam, or there is a situation where the OD-SSB cannot be quasi-co-located to the AO-SSB;

[0416] Condition 2: More than one OD-SSB quasi-co-addressable to the same AO-SSB index;

[0417] Condition 3: The period of AO-SSB is greater than or equal to the threshold value;

[0418] Condition 4: The number of Normal RACH resources during the RACH configuration period is less than or equal to the threshold value;

[0419] Condition 5: The probability of conflict for Normal RACH resources is greater than or equal to the threshold value.

[0420] It should be noted that the activation and deactivation of Additional RACH resources are described in the technical solution and will not be repeated here.

[0421] In this way, the terminal can dynamically activate additional random access resources by receiving indication signaling, thereby avoiding the waste of resources caused by continuously sending random access resources. At the same time, the terminal can determine the dynamically activated random access resources as the random access resources associated with the on-demand reference signal and perform random access.

[0422] In one possible embodiment, such as Figure 8 As shown, when the OD-SSB activates more beam directions, it is necessary to further determine the RACH resources associated with the OD-SSB at this time. Specifically, the following scheme (Case) can be used to determine this.

[0423] Case 1: When configuring the mapping rules between OD-SSB and RACH resources, the mapping is performed according to the complete set of OD-SSBs and RACH resources. In this case, regardless of whether a part of the OD-SSB is on or off, there will always be a RACH resource that can be mapped. When there is an AO-SSB, since all RACH resources have an associated AO-SSB, there will be no situation where RACH resources are idle.

[0424] Case 2: Since some beams of the OD-SSB are shut down for extended periods, dynamic RACH resource mapping is implemented to maximize the utilization of RACH resources. Combined with... Figure 8As shown, when only OD-SSBs #0 to #3 are enabled, the network-side device only considers the existence of OD-SSBs #0 to #3 when configuring the mapping between OD-SSBs and RACH resources. For example, it might evenly distribute 8 ROs or 40 available preambles on ROs to these four OD-SSBs. However, when OD-SSBs #4 to #7 are enabled, the network-side device updates the mapping rules between OD-SSBs and RACH resources, for example, evenly distributing 8 ROs or 40 available preambles on ROs to these eight OD-SSBs. Optionally, the mapping order follows the sequence number of all OD-SSBs, such as OD-SSBs #0 to #7; another possibility is to first map according to the sequence number of the enabled OD-SSBs, and then according to the sequence number of the later enabled OD-SSBs. For example, if the first enabled OD-SSBs are OD-SSBs #0, #2, #4, and #6, these four are mapped first, and then the remaining later enabled OD-SSBs are mapped.

[0425] It is understandable that the aforementioned mapping rules can be pre-configured to the terminal by the network-side device or communicated to the terminal via system messages. Furthermore, the updated mapping rules can be communicated to the terminal by the network-side device via RRC, MAC CE, or DCI information, or via SIB.

[0426] Thus, when the OD-SSB opens up more beam directions, the RACH resources associated with the OD-SSB can be determined according to different schemes.

[0427] Furthermore, in the random access method provided in this application embodiment, the terminal also needs to determine the availability of random access resources.

[0428] For example, a random access resource indicated or configured by the network-side device is considered invalid if it meets the following conditions; that is, a random access resource indicated or configured by the network-side device is valid if it does not meet the following conditions. For example, the above conditions include any one of the following:

[0429] When there is a reference signal in the slot, it is positioned before the reference signal;

[0430] When there is a reference signal in the slot, it is located within L symbols after the reference signal;

[0431] It overlaps or partially overlaps with the reference signal.

[0432] It should be noted that the above reference signal can be at least one of AO-SSB, OD-SSB, CSI-RS, TRS, and LP-SS.

[0433] In this way, the terminal can confirm whether the random access resource indicated or configured by the network-side device is a valid random access resource based on the above conditions, thereby ensuring that the random access resource used by the terminal is valid, and thus ensuring that the terminal performs random access operation.

[0434] For example, after the network-side device configures or indicates random access resources, it first determines whether the random access resources are available according to the method described above. Available random access resources are then mapped to SSBs to form an association. After the on-demand reference signal is sent, the terminal selects a valid random access resource to perform random access.

[0435] For example, after the network-side device configures or indicates random access resources, it first determines whether the random access resources are available according to the above method. After the on-demand reference signal is sent, the terminal selects a valid random access resource to perform random access.

[0436] It should be noted that the method for determining the random access resources associated with the OD-SSB in the above-mentioned terminal side, and the related description, are also applicable to the network side equipment, and will not be repeated here.

[0437] The random access method provided in this application can be executed by a random access device. This application uses an example of a random access device executing the random access method to illustrate the random access device provided in this application.

[0438] This application provides a random access device. As an example, the random access device may be a communication device or a component within a communication device, such as a chip. The communication device may be a terminal, a network-side device, or a server, etc. Exemplarily, the terminal may include, but is not limited to, the type of terminal 11 listed above, and the network-side device may include, but is not limited to, the type of network-side device 12 listed above. This application does not impose specific limitations.

[0439] The random access device includes a receiving module, a transmitting module, and a processing module. These modules can be implemented in software or hardware. When implemented in hardware, the processing module can be implemented by a processor. For example, the processor can include a general-purpose processor, a special-purpose processor, such as a Central Processing Unit (CPU), a microprocessor, a Digital Signal Processor (DSP), an Artificial Intelligence (AI) processor, a Graphics Processing Unit (GPU), an Application Specific Integrated Circuit (ASIC), a Network Processor (NP), a Field Programmable Gate Array (FPGA), or other programmable logic devices, gate circuits, transistors, discrete hardware components, etc. The receiving and transmitting modules can be implemented by a communication interface, which can include one or more of the following: transceiver, pins, circuits, buses, radio frequency units, etc.

[0440] For details, see Figure 9 When the random access device is a terminal or a component in a terminal, the random access device 600 includes a processing module 601 for performing random access based on the random access resources associated with the on-demand reference signal;

[0441] The random access resources associated with the aforementioned on-demand reference signal are at least one of the following:

[0442] The random access resources associated with the first type of SSB, wherein the first type of SSB is a periodically sent SSB;

[0443] The random access resources associated with the on-demand reference signal indicated by the instruction signaling;

[0444] Random access resources associated with on-demand reference signals configured on network-side devices.

[0445] Optionally, in some embodiments of this application, the random access resource includes at least one of the following: RO, preamble, preamble index, preamble index set, RO index, RO time-frequency domain position, RO period; the preamble index set includes at least one preamble index.

[0446] Optionally, in some embodiments of this application, the random access resources associated with the first type of SSB mentioned above include at least one of the following:

[0447] The first SSB index maps some or all of the random access resources, wherein the first SSB index is the same as the index of the first on-demand reference signal for the first type of SSB;

[0448] The second SSB index maps some or all of the random access resources, wherein the second SSB index is an index of a first type of SSB that is quasi-co-located with the first on-demand reference signal;

[0449] The first on-demand reference signal is one of the on-demand reference signals.

[0450] Optionally, in some embodiments of this application, the SSB corresponding to the second SSB index is quasi-co-located with multiple first on-demand reference signals.

[0451] Optionally, in some embodiments of this application, some or all of the random access resources associated with the first on-demand reference signal in the random access resources mapped by the second SSB index are determined based on at least one of the following:

[0452] The order of the indices of the aforementioned multiple first on-demand reference signals;

[0453] The resource range of the random access resources associated with the aforementioned second SSB index as specified in the agreement or indicated by the signaling.

[0454] Optionally, in some embodiments of this application, the above-mentioned indication signaling indicates at least one of the following:

[0455] The third SSB index is the index of the first type of SSB mentioned above, or the index of the on-demand reference signal mentioned above.

[0456] The random access resources associated with the aforementioned third SSB index;

[0457] The time-frequency domain resources of the random access resources associated with the aforementioned on-demand reference signals;

[0458] Physical random access channel configuration index;

[0459] First offset value.

[0460] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signal indicated by the above-mentioned indication signaling include at least one of the following:

[0461] Random access resources determined based on the time-frequency domain location of the first target;

[0462] Random access resources determined based on the first offset value and the time-frequency domain location of the first target;

[0463] The random access resources indicated by the above physical random access channel configuration index;

[0464] Random access resources that do not overlap with the random access resources associated with the first type of SSB mentioned above;

[0465] The random access resources associated with the third SSB index mentioned above.

[0466] Optionally, in some embodiments of this application, the time-frequency domain location of the first target is at least one of the following:

[0467] The time-frequency domain location of the random access resources associated with the first type of SSB mentioned above;

[0468] The time-frequency domain location of the random access resources associated with the aforementioned on-demand reference signal;

[0469] The time-frequency domain location of the random access resource indicated by the aforementioned physical random access channel configuration index;

[0470] The time-frequency domain position of the first on-demand reference signal of the aforementioned terminal, wherein the first on-demand reference signal is one of the on-demand reference signals received by the aforementioned terminal.

[0471] Optionally, in some embodiments of this application, combined with Figure 9 ,like Figure 10 As shown, the random access device 600 further includes a receiving module 602; the receiving module 602 is used to receive configuration information sent by the network-side device, the configuration information being used to configure the random access resources associated with the on-demand reference signal.

[0472] Optionally, in some embodiments of this application, the above configuration information includes at least one of the following:

[0473] The fourth SSB index is the index of the first type of SSB mentioned above, or the index of the on-demand reference signal mentioned above.

[0474] The random access resources associated with the fourth SSB index mentioned above;

[0475] The time-frequency domain resources of the random access resources associated with the aforementioned on-demand reference signals;

[0476] Physical random access channel configuration index;

[0477] Second offset value;

[0478] The third offset value of the wireless frame position;

[0479] Subframe number;

[0480] Start symbol;

[0481] Random access resource configuration cycle;

[0482] On-demand reference signal mapping period to RO;

[0483] The correlation period between the reference signal and RO on demand;

[0484] The period of the correlation pattern between the reference signal and RO on demand.

[0485] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signals configured by the network-side device include at least one of the following:

[0486] Random access resources determined based on the time-frequency domain location of the second target;

[0487] Random access resources determined based on the first offset value and the time-frequency domain location of the second target;

[0488] The random access resources indicated by the above physical random access channel configuration index;

[0489] Random access resources that do not overlap with the random access resources associated with the first type of SSB mentioned above;

[0490] The random access resources associated with the fourth SSB index mentioned above;

[0491] The time-frequency domain resources of the random access resources associated with the aforementioned on-demand reference signals;

[0492] Random access resources determined based on the third offset value of the aforementioned radio frame position;

[0493] Random access resources determined based on subframe sequence number;

[0494] Random access resources determined by the start symbol;

[0495] Random access resources are determined based on the random access resource configuration period.

[0496] Optionally, in some embodiments of this application, the time-frequency domain location of the second target is at least one of the following:

[0497] The time-frequency domain location of the random access resources associated with the first type of SSB mentioned above;

[0498] The time-frequency domain location of the random access resources associated with the aforementioned on-demand reference signal;

[0499] The time-frequency domain location of the random access resource indicated by the aforementioned physical random access channel configuration index;

[0500] The time-frequency domain position of the first on-demand reference signal of the aforementioned terminal, wherein the first on-demand reference signal is one of the on-demand reference signals received by the aforementioned terminal.

[0501] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signal are located within one or more frequency domain resources; the frequency domain resources include at least one of the following: frequency domain unit, frequency domain subband, carrier, and bandwidth portion.

[0502] Optionally, in some embodiments of this application, the random access resource associated with the on-demand reference signal is an additional random access resource, which is a dynamically activated random access resource.

[0503] Optionally, in some embodiments of this application, the additional random access resources are activated when the second condition is met;

[0504] The second condition above includes at least one of the following:

[0505] The aforementioned on-demand reference signal is activated;

[0506] The aforementioned terminal receives information instructing the activation of additional random access resources associated with the aforementioned on-demand reference signal;

[0507] At least two of the above terminals are quasi-co-located to the same first type SSB using their first on-demand reference signals;

[0508] The number of random access resources associated with the first type of SSB is less than the first threshold value;

[0509] The number of terminals requesting the above-mentioned on-demand reference signal is greater than the second threshold value;

[0510] The multicast signaling indicates the activation of the aforementioned on-demand reference signal;

[0511] The aforementioned on-demand reference signal is independent of the random access resources associated with the aforementioned first type of SSB;

[0512] The congestion level of the random access resources associated with the first type of SSB mentioned above is greater than the third threshold.

[0513] Optionally, in some embodiments of this application, combined with Figure 9 ,like Figure 11 As shown, the random access device 600 further includes a receiving module 603; the receiving module 603 is used to receive a first signaling, the first signaling including information indicating the activation of additional random access resources associated with the first on-demand reference signal and information indicating the activation of the first on-demand reference signal.

[0514] Optionally, in some embodiments of this application, the additional random access resources are associated with both the first type of SSB and the on-demand reference signal.

[0515] Optionally, in some embodiments of this application, the additional random access resources described above are only associated with the on-demand reference signals described above.

[0516] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signals described above are valid random access resources if a first condition is met.

[0517] The first condition mentioned above includes at least one of the following:

[0518] The difference between the time domain location of the random access resource associated with the aforementioned on-demand reference signal and the time domain location of the first on-demand reference signal of the aforementioned terminal is no greater than the fourth threshold value, and the aforementioned first on-demand reference signal is one of the on-demand reference signals received by the aforementioned terminal;

[0519] The random access resources associated with the aforementioned on-demand reference signal are activated;

[0520] The random access resources associated with the aforementioned on-demand reference signals are configured by the network-side equipment.

[0521] Optionally, in some embodiments of this application, the random access resources associated with the aforementioned on-demand reference signal are activated after the first reference time or after time T1 has elapsed from the first reference time.

[0522] Optionally, in some embodiments of this application, the first reference time mentioned above is any one of the following:

[0523] The transmission start time of the aforementioned on-demand reference signal;

[0524] The terminal receives the fourth indication information at the time of receiving the fourth indication information, which is used to inform the terminal that the network-side device will send an on-demand reference signal.

[0525] The terminal sends the fifth instruction information at the time of transmission. The fifth instruction information is used to request the network-side device to send an on-demand reference signal.

[0526] The moment when the aforementioned terminal receives the first valid on-demand reference signal;

[0527] The time at which the candidate location for the first additional random access resource after the scheduled time is located;

[0528] The first time unit of the first cycle in which the scheduled time occurs;

[0529] The first time unit of the first cycle after the first cycle in which the scheduled time occurs.

[0530] Optionally, in some embodiments of this application, the first cycle is at least one of the following: inactive discontinuous reception I-DRX cycle, connected discontinuous reception C-DRX cycle, SSB-RO mapping cycle, SSB-RO association cycle, SSB-RO association pattern cycle, and system information SI modification cycle.

[0531] Optionally, in some embodiments of this application, the predetermined time includes at least one of the following:

[0532] The transmission time of the aforementioned first on-demand reference signal;

[0533] The terminal receives the fourth indication information at the time of receiving the fourth indication information, which is used to inform the terminal that the network-side device will send an on-demand reference signal.

[0534] The terminal sends the fifth instruction information at the time of transmission. The fifth instruction information is used to request the network-side device to send an on-demand reference signal.

[0535] The moment when the aforementioned terminal receives the first valid on-demand reference signal.

[0536] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signal are deactivated after the second reference time or after time T2 has elapsed from the second reference time.

[0537] Optionally, in some embodiments of this application, the second reference time mentioned above is any one of the following:

[0538] The end time of transmission of the aforementioned on-demand reference signal;

[0539] Deactivate the on-demand reference signaling reception time;

[0540] The time indicated by the network-side device;

[0541] The last time unit of the first cycle in which the last of the aforementioned first on-demand reference signals is located;

[0542] The first time unit of the next first cycle in which the last of the aforementioned first on-demand reference signals is located;

[0543] The moment when the random access procedure ends;

[0544] The moment after the aforementioned terminal sends the feedback Msg4;

[0545] The moment when the aforementioned terminal receives Msg5;

[0546] The moment when the aforementioned terminal receives the Radio Resource Control (RRC) connection completion message;

[0547] The time after the aforementioned terminal sends Msg1;

[0548] The timing of candidate cells for Layer 1 mobility management is determined in advance;

[0549] The time after the aforementioned terminal performs the cell handover operation;

[0550] The moment when the aforementioned terminal received the cell handover command.

[0551] In the random access device provided in this application embodiment, the random access device performs random access based on random access resources associated with an on-demand reference signal. The random access resources associated with the on-demand reference signal are at least one of the following: random access resources associated with a first type SSB, where the first type SSB is a periodically transmitted SSB; random access resources associated with an on-demand reference signal indicated by indication signaling; and random access resources associated with an on-demand reference signal configured by the network-side device. In this solution, the random access device can initiate random access on the random access resources associated with the aforementioned on-demand reference signal to execute the random access procedure.

[0552] See Figure 12 When the random access device is a network-side device or a component of a network-side device, the random access device 700 includes a transmitting module 701 for indicating or configuring the random access resources associated with the on-demand reference signal to the terminal.

[0553] The random access resources associated with the aforementioned on-demand reference signal are at least one of the following:

[0554] The random access resources associated with the first type of SSB, wherein the first type of SSB is a periodically sent SSB;

[0555] The aforementioned network-side equipment indicates the random access resources associated with the on-demand reference signal indicated by the signaling.

[0556] The random access resources associated with the on-demand reference signals configured in the aforementioned network-side devices.

[0557] Optionally, in some embodiments of this application, the random access resource includes at least one of the following: RO, preamble, preamble index, preamble index set, RO index, RO time-frequency domain position, RO period; the preamble index set includes at least one preamble index.

[0558] Optionally, in some embodiments of this application, the above-mentioned indication signaling indicates at least one of the following:

[0559] The third SSB index is the index of the first type of SSB mentioned above, or the index of the on-demand reference signal mentioned above.

[0560] The random access resources associated with the aforementioned third SSB index;

[0561] The time-frequency domain resources of the random access resources associated with the aforementioned on-demand reference signals;

[0562] Physical random access channel configuration index;

[0563] First offset value.

[0564] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signal indicated by the above-mentioned indication signaling include at least one of the following:

[0565] Random access resources determined based on the time-frequency domain location of the first target;

[0566] Random access resources determined based on the first offset value and the time-frequency domain location of the first target;

[0567] The random access resources indicated by the above physical random access channel configuration index;

[0568] Random access resources that do not overlap with the random access resources associated with the first type of SSB mentioned above;

[0569] The random access resources associated with the third SSB index mentioned above.

[0570] Optionally, in some embodiments of this application, the sending module 701 is further configured to send configuration information to the terminal, wherein the configuration information is used to configure the random access resources associated with the on-demand reference signal.

[0571] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signals configured by the network-side device include at least one of the following:

[0572] Random access resources determined based on the time-frequency domain location of the second target;

[0573] Random access resources determined based on the first offset value and the time-frequency domain location of the second target;

[0574] The random access resources indicated by the above physical random access channel configuration index;

[0575] Random access resources that do not overlap with the random access resources associated with the first type of SSB mentioned above;

[0576] The random access resources associated with the fourth SSB index mentioned above;

[0577] The time-frequency domain resources of the random access resources associated with the aforementioned on-demand reference signals;

[0578] Random access resources determined based on the third offset value of the aforementioned radio frame position;

[0579] Random access resources determined based on subframe sequence number;

[0580] Random access resources determined by the start symbol;

[0581] Random access resources are determined based on the random access resource configuration period.

[0582] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signal are located within one or more frequency domain resources; the frequency domain resources include at least one of the following: frequency domain unit, frequency domain subband, carrier, and bandwidth portion.

[0583] Optionally, in some embodiments of this application, the random access resource associated with the on-demand reference signal is an additional random access resource, which is a dynamically activated random access resource.

[0584] Optionally, in some embodiments of this application, the aforementioned additional random access resources are activated when the second condition is met;

[0585] The second condition above includes at least one of the following:

[0586] The aforementioned on-demand reference signal is activated;

[0587] The aforementioned terminal receives information instructing the activation of additional random access resources associated with the aforementioned on-demand reference signal;

[0588] At least two of the above terminals are quasi-co-located to the same first type SSB using their first on-demand reference signals;

[0589] The number of random access resources associated with the first type of SSB is less than the first threshold value;

[0590] The number of terminals requesting the above-mentioned on-demand reference signal is greater than the second threshold value;

[0591] The multicast signaling indicates the activation of the aforementioned on-demand reference signal;

[0592] The aforementioned on-demand reference signal is independent of the random access resources associated with the aforementioned first type of SSB;

[0593] The congestion level of the random access resources associated with the first type of SSB mentioned above is greater than the third threshold.

[0594] Optionally, in some embodiments of this application, the sending module 701 is further configured to send a first signaling to the terminal, the first signaling including information indicating the activation of additional random access resources associated with the first on-demand reference signal and information indicating the activation of the first on-demand reference signal.

[0595] Optionally, in some embodiments of this application, the additional random access resources are associated with both the first type of SSB and the on-demand reference signal.

[0596] Optionally, in some embodiments of this application, the additional random access resources described above are only associated with the on-demand reference signals described above.

[0597] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signals described above are valid random access resources if a first condition is met.

[0598] The first condition mentioned above includes at least one of the following:

[0599] The difference between the time domain location of the random access resource associated with the aforementioned on-demand reference signal and the time domain location of the first on-demand reference signal of the aforementioned terminal is no greater than the fourth threshold value, and the aforementioned first on-demand reference signal is one of the on-demand reference signals received by the aforementioned terminal;

[0600] The random access resources associated with the aforementioned on-demand reference signal are activated;

[0601] The random access resources associated with the aforementioned on-demand reference signals are configured by the network-side equipment.

[0602] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signal are activated after the first reference time or after time T1 has elapsed from the first reference time.

[0603] Optionally, in some embodiments of this application, the first reference time mentioned above is any one of the following:

[0604] The transmission start time of the aforementioned on-demand reference signal;

[0605] The terminal receives the fourth indication information at the time of receiving the fourth indication information, which is used to inform the terminal that the network-side device will send an on-demand reference signal.

[0606] The terminal sends the fifth instruction information at the time of transmission. The fifth instruction information is used to request the network-side device to send an on-demand reference signal.

[0607] The moment when the aforementioned terminal receives the first valid on-demand reference signal;

[0608] The time at which the candidate location for the first additional random access resource after the scheduled time is located;

[0609] The first time unit of the first cycle in which the scheduled time occurs;

[0610] The first time unit of the first cycle after the first cycle in which the scheduled time occurs.

[0611] Optionally, in some embodiments of this application, the first cycle is at least one of the following: inactive discontinuous reception I-DRX cycle, connected discontinuous reception C-DRX cycle, SSB-RO mapping cycle, SSB-RO association cycle, SSB-RO association pattern cycle, and system information SI modification cycle.

[0612] Optionally, in some embodiments of this application, the predetermined time includes at least one of the following:

[0613] The transmission time of the aforementioned first on-demand reference signal;

[0614] The terminal receives the fourth indication information at the time of receiving the fourth indication information, which is used to inform the terminal that the network-side device will send an on-demand reference signal.

[0615] The terminal sends the fifth instruction information at the time of transmission. The fifth instruction information is used to request the network-side device to send an on-demand reference signal.

[0616] The moment when the aforementioned terminal receives the first valid on-demand reference signal.

[0617] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signal are deactivated after the second reference time or after time T2 has elapsed from the second reference time.

[0618] Optionally, in some embodiments of this application, the second reference time mentioned above is any one of the following:

[0619] The end time of transmission of the aforementioned on-demand reference signal;

[0620] Deactivate the on-demand reference signaling reception time;

[0621] The time indicated by the network-side device;

[0622] The last time unit of the first cycle in which the last of the aforementioned first on-demand reference signals is located;

[0623] The first time unit of the next first cycle in which the last of the aforementioned first on-demand reference signals is located;

[0624] The moment when the random access procedure ends;

[0625] The moment after the aforementioned terminal sends the feedback Msg4;

[0626] The moment when the aforementioned terminal receives Msg5;

[0627] The moment when the aforementioned terminal receives the Radio Resource Control (RRC) connection completion message;

[0628] The time after the aforementioned terminal sends Msg1;

[0629] The timing of candidate cells for Layer 1 mobility management is determined in advance;

[0630] The time after the aforementioned terminal performs the cell handover operation;

[0631] The moment when the aforementioned terminal received the cell handover command.

[0632] In the random access device provided in this application embodiment, the random access device indicates or configures a random access resource associated with an on-demand reference signal to the terminal. The random access resource associated with the on-demand reference signal is at least one of the following: a random access resource associated with a first type SSB, where the first type SSB is a periodically transmitted SSB; a random access resource associated with an on-demand reference signal indicated by the network-side device via indication signaling; or a random access resource associated with an on-demand reference signal configured by the network-side device. In this solution, the random access device can indicate or configure the random access resource associated with the on-demand reference signal to the terminal, enabling the terminal to initiate random access on that random access resource and execute a random access procedure.

[0633] The random access device provided in this application embodiment can achieve... Figures 4 to 8 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0634] like Figure 13 As shown in the illustration, this application also provides a communication device 800, including a processor 801 and a memory 802. The memory 802 stores programs or instructions that can run on the processor 801. For example, when the communication device 800 is a terminal, the program or instructions executed by the processor 801 implement the various steps of the above-described random access method embodiment and achieve the same technical effect. When the communication device 800 is a network-side device, the program or instructions executed by the processor 801 implement the various steps of the above-described random access method embodiment and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0635] This application embodiment also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement, for example... Figure 4The steps in the method embodiment shown are illustrated. This terminal embodiment corresponds to the above-described terminal-side method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and achieve the same technical effect. The terminal can be... Figure 9 The random access device shown. Specifically, Figure 14 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0636] The terminal 100 includes, but is not limited to, at least some of the following components: radio frequency unit 101, network module 102, audio output unit 103, input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, and processor 110.

[0637] Those skilled in the art will understand that the terminal 100 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 110 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 14 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0638] It should be understood that, in this embodiment, the input unit 104 may include a graphics processor 1041 and a microphone 1042. The graphics processor 1041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 106 may include a display panel 1061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 107 includes at least one of a touch panel 1071 and other input devices 1072. The touch panel 1071 is also called a touch screen. The touch panel 1071 may include a touch detection device and a touch controller. Other input devices 1072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0639] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 101 can transmit it to the processor 110 for processing; in addition, the radio frequency unit 101 can send uplink data to the network-side device. Typically, the radio frequency unit 101 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0640] The memory 109 can be used to store software programs or instructions, as well as various data. The memory 109 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.), etc. Furthermore, the memory 109 may include volatile memory or non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (Synchlink DRAM, SLDRAM), and direct memory bus RAM (DRRAM). The memory 109 in the embodiments of this application includes, but is not limited to, these and any other suitable types of memory.

[0641] Processor 110 may include one or more processing units; optionally, processor 110 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 110.

[0642] The aforementioned processing 110 is used to perform random access based on the random access resources associated with the on-demand reference signal;

[0643] The random access resources associated with the aforementioned on-demand reference signal are at least one of the following:

[0644] The random access resources associated with the first type of SSB, wherein the first type of SSB is a periodically sent SSB;

[0645] The random access resources associated with the on-demand reference signal indicated by the instruction signaling;

[0646] Random access resources associated with on-demand reference signals configured on network-side devices.

[0647] Optionally, in some embodiments of this application, the random access resource includes at least one of the following: RO, preamble, preamble index, preamble index set, RO index, RO time-frequency domain position, RO period; the preamble index set includes at least one preamble index.

[0648] Optionally, in some embodiments of this application, the random access resources associated with the first type of SSB mentioned above include at least one of the following:

[0649] The first SSB index maps some or all of the random access resources, wherein the first SSB index is the same as the index of the first on-demand reference signal for the first type of SSB;

[0650] The second SSB index maps some or all of the random access resources, wherein the second SSB index is an index of a first type of SSB that is quasi-co-located with the first on-demand reference signal;

[0651] The first on-demand reference signal is one of the on-demand reference signals.

[0652] Optionally, in some embodiments of this application, the SSB corresponding to the second SSB index is quasi-co-located with multiple first on-demand reference signals.

[0653] Optionally, in some embodiments of this application, some or all of the random access resources associated with the first on-demand reference signal in the random access resources mapped by the second SSB index are determined based on at least one of the following:

[0654] The order of the indices of the aforementioned multiple first on-demand reference signals;

[0655] The resource range of the random access resources associated with the aforementioned second SSB index as specified in the agreement or indicated by the signaling.

[0656] Optionally, in some embodiments of this application, the above-mentioned indication signaling indicates at least one of the following:

[0657] The third SSB index is the index of the first type of SSB mentioned above, or the index of the on-demand reference signal mentioned above.

[0658] The random access resources associated with the aforementioned third SSB index;

[0659] The time-frequency domain resources of the random access resources associated with the aforementioned on-demand reference signals;

[0660] Physical random access channel configuration index;

[0661] First offset value.

[0662] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signal indicated by the above-mentioned indication signaling include at least one of the following:

[0663] Random access resources determined based on the time-frequency domain location of the first target;

[0664] Random access resources determined based on the aforementioned first offset value and the time-frequency domain location of the first target;

[0665] The random access resources indicated by the above physical random access channel configuration index;

[0666] Random access resources that do not overlap with the random access resources associated with the first type of SSB mentioned above;

[0667] The random access resources associated with the third SSB index mentioned above.

[0668] Optionally, in some embodiments of this application, the time-frequency domain location of the first target is at least one of the following:

[0669] The time-frequency domain location of the random access resources associated with the first type of SSB mentioned above;

[0670] The time-frequency domain location of the random access resources associated with the aforementioned on-demand reference signal;

[0671] The time-frequency domain location of the random access resource indicated by the aforementioned physical random access channel configuration index;

[0672] The time-frequency domain position of the first on-demand reference signal of the aforementioned terminal, wherein the first on-demand reference signal is one of the on-demand reference signals received by the aforementioned terminal.

[0673] Optionally, in some embodiments of this application, the radio frequency unit 101 is used to receive configuration information sent by the network-side device, the configuration information being used to configure the random access resources associated with the on-demand reference signal.

[0674] Optionally, in some embodiments of this application, the above configuration information includes at least one of the following:

[0675] The fourth SSB index is the index of the first type of SSB mentioned above, or the index of the on-demand reference signal mentioned above.

[0676] The random access resources associated with the fourth SSB index mentioned above;

[0677] The time-frequency domain resources of the random access resources associated with the aforementioned on-demand reference signals;

[0678] Physical random access channel configuration index;

[0679] Second offset value;

[0680] The third offset value of the wireless frame position;

[0681] Subframe number;

[0682] Start symbol;

[0683] Random access resource configuration cycle;

[0684] On-demand reference signal mapping period to RO;

[0685] The correlation period between the reference signal and RO on demand;

[0686] The period of the correlation pattern between the reference signal and RO on demand.

[0687] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signals configured by the network-side device include at least one of the following:

[0688] Random access resources determined based on the time-frequency domain location of the second target;

[0689] Random access resources determined based on the first offset value and the time-frequency domain location of the second target;

[0690] The random access resources indicated by the above physical random access channel configuration index;

[0691] Random access resources that do not overlap with the random access resources associated with the first type of SSB mentioned above;

[0692] The random access resources associated with the fourth SSB index mentioned above;

[0693] The time-frequency domain resources of the random access resources associated with the aforementioned on-demand reference signals;

[0694] Random access resources determined based on the third offset value of the aforementioned radio frame position;

[0695] Random access resources determined based on subframe sequence number;

[0696] Random access resources determined by the start symbol;

[0697] Random access resources are determined based on the random access resource configuration period.

[0698] Optionally, in some embodiments of this application, the time-frequency domain location of the second target is at least one of the following:

[0699] The time-frequency domain location of the random access resources associated with the first type of SSB mentioned above;

[0700] The time-frequency domain location of the random access resources associated with the aforementioned on-demand reference signal;

[0701] The time-frequency domain location of the random access resource indicated by the aforementioned physical random access channel configuration index;

[0702] The time-frequency domain position of the first on-demand reference signal of the aforementioned terminal, wherein the first on-demand reference signal is one of the on-demand reference signals received by the aforementioned terminal.

[0703] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signal are located within one or more frequency domain resources; the frequency domain resources include at least one of the following: frequency domain unit, frequency domain subband, carrier, and bandwidth portion.

[0704] Optionally, in some embodiments of this application, the random access resource associated with the on-demand reference signal is an additional random access resource, which is a dynamically activated random access resource.

[0705] Optionally, in some embodiments of this application, the additional random access resources are activated when the second condition is met;

[0706] The second condition above includes at least one of the following:

[0707] The aforementioned on-demand reference signal is activated;

[0708] The aforementioned terminal receives information instructing the activation of additional random access resources associated with the aforementioned on-demand reference signal;

[0709] At least two of the above terminals are quasi-co-located to the same first type SSB using their first on-demand reference signals;

[0710] The number of random access resources associated with the first type of SSB is less than the first threshold value;

[0711] The number of terminals requesting the above-mentioned on-demand reference signal is greater than the second threshold value;

[0712] The multicast signaling indicates the activation of the aforementioned on-demand reference signal;

[0713] The aforementioned on-demand reference signal is independent of the random access resources associated with the aforementioned first type of SSB;

[0714] The congestion level of the random access resources associated with the first type of SSB mentioned above is greater than the third threshold.

[0715] Optionally, in some embodiments of this application, the radio frequency unit 101 is further configured to receive a first signaling, the first signaling including information indicating the activation of additional random access resources associated with the first on-demand reference signal and information indicating the activation of the first on-demand reference signal.

[0716] Optionally, in some embodiments of this application, the additional random access resources are associated with both the first type of SSB and the on-demand reference signal.

[0717] Optionally, in some embodiments of this application, the additional random access resources described above are only associated with the on-demand reference signals described above.

[0718] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signals described above are valid random access resources if a first condition is met.

[0719] The first condition mentioned above includes at least one of the following:

[0720] The difference between the time domain location of the random access resource associated with the aforementioned on-demand reference signal and the time domain location of the first on-demand reference signal of the aforementioned terminal is no greater than the fourth threshold value, and the aforementioned first on-demand reference signal is one of the on-demand reference signals received by the aforementioned terminal;

[0721] The random access resources associated with the aforementioned on-demand reference signal are activated;

[0722] The random access resources associated with the aforementioned on-demand reference signals are configured by the network-side equipment.

[0723] Optionally, in some embodiments of this application, the random access resources associated with the aforementioned on-demand reference signal are activated after the first reference time or after time T1 has elapsed from the first reference time.

[0724] Optionally, in some embodiments of this application, the first reference time mentioned above is any one of the following:

[0725] The transmission start time of the aforementioned on-demand reference signal;

[0726] The terminal receives the fourth indication information at the time of receiving the fourth indication information, which is used to inform the terminal that the network-side device will send an on-demand reference signal.

[0727] The terminal sends the fifth instruction information at the time of transmission. The fifth instruction information is used to request the network-side device to send an on-demand reference signal.

[0728] The moment when the aforementioned terminal receives the first valid on-demand reference signal;

[0729] The time at which the candidate location for the first additional random access resource after the scheduled time is located;

[0730] The first time unit of the first cycle in which the scheduled time occurs;

[0731] The first time unit of the first cycle after the first cycle in which the scheduled time occurs.

[0732] Optionally, in some embodiments of this application, the first cycle is at least one of the following: inactive discontinuous reception I-DRX cycle, connected discontinuous reception C-DRX cycle, SSB-RO mapping cycle, SSB-RO association cycle, SSB-RO association pattern cycle, and system information SI modification cycle.

[0733] Optionally, in some embodiments of this application, the predetermined time includes at least one of the following:

[0734] The transmission time of the aforementioned first on-demand reference signal;

[0735] The terminal receives the fourth indication information at the time of receiving the fourth indication information, which is used to inform the terminal that the network-side device will send an on-demand reference signal.

[0736] The terminal sends the fifth instruction information at the time of transmission. The fifth instruction information is used to request the network-side device to send an on-demand reference signal.

[0737] The moment when the aforementioned terminal receives the first valid on-demand reference signal.

[0738] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signal are deactivated after the second reference time or after time T2 has elapsed from the second reference time.

[0739] Optionally, in some embodiments of this application, the second reference time mentioned above is any one of the following:

[0740] The end time of transmission of the aforementioned on-demand reference signal;

[0741] Deactivate the on-demand reference signaling reception time;

[0742] The time indicated by the network-side device;

[0743] The last time unit of the first cycle in which the last of the aforementioned first on-demand reference signals is located;

[0744] The first time unit of the next first cycle in which the last of the aforementioned first on-demand reference signals is located;

[0745] The moment when the random access procedure ends;

[0746] The moment after the aforementioned terminal sends the feedback Msg4;

[0747] The moment when the aforementioned terminal receives Msg5;

[0748] The moment when the aforementioned terminal receives the Radio Resource Control (RRC) connection completion message;

[0749] The time after the aforementioned terminal sends Msg1;

[0750] The timing of candidate cells for Layer 1 mobility management is determined in advance;

[0751] The time after the aforementioned terminal performs the cell handover operation;

[0752] The moment when the aforementioned terminal received the cell handover command.

[0753] In the terminal provided in this application embodiment, the terminal performs random access based on random access resources associated with an on-demand reference signal. The random access resources associated with the on-demand reference signal are at least one of the following: random access resources associated with a first type SSB, where the first type SSB is a periodically transmitted SSB; random access resources associated with an on-demand reference signal indicated by indication signaling; and random access resources associated with an on-demand reference signal configured by the network-side device. In this solution, the terminal can initiate random access on the random access resources associated with the aforementioned on-demand reference signal to execute the random access procedure.

[0754] It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the random access method in the method embodiment and achieve the same or corresponding technical effect. To avoid repetition, it will not be described again here.

[0755] This application also provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the random access method embodiment. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this network-side device embodiment and achieve the same technical effects.

[0756] Specifically, embodiments of this application also provide a network-side device, which can be... Figure 12 The random access device shown. For example... Figure 15As shown, the network-side device 900 includes: an antenna 91, a radio frequency (RF) device 92, a baseband device 93, a processor 94, and a memory 95. The antenna 91 is connected to the RF device 92. In the uplink direction, the RF device 92 receives information through the antenna 91 and transmits the received information to the baseband device 93 for processing. In the downlink direction, the baseband device 93 processes the information to be transmitted and sends it to the RF device 92. The RF device 92 processes the received information and transmits it through the antenna 91.

[0757] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 93, which includes a baseband processor.

[0758] Baseband device 93 may include, for example, at least one baseband board on which multiple chips are disposed, such as Figure 15 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 95 via a bus interface to call the program or instructions in the memory 95 to execute the network-side device operations shown in the above method embodiments.

[0759] The network-side device may also include a network interface 96, such as a Common Public Radio Interface (CPRI).

[0760] The aforementioned radio frequency device 92 is used to indicate or configure the random access resources associated with the on-demand reference signal to the terminal.

[0761] The random access resources associated with the aforementioned on-demand reference signal are at least one of the following:

[0762] The random access resources associated with the first type of SSB, wherein the first type of SSB is a periodically sent SSB;

[0763] The aforementioned network-side equipment indicates the random access resources associated with the on-demand reference signal indicated by the signaling.

[0764] The random access resources associated with the on-demand reference signals configured in the aforementioned network-side devices.

[0765] Optionally, in some embodiments of this application, the random access resource includes at least one of the following: RO, preamble, preamble index, preamble index set, RO index, RO time-frequency domain position, RO period; the preamble index set includes at least one preamble index.

[0766] Optionally, in some embodiments of this application, the above-mentioned indication signaling indicates at least one of the following:

[0767] The third SSB index is the index of the first type of SSB mentioned above, or the index of the on-demand reference signal mentioned above.

[0768] The random access resources associated with the aforementioned third SSB index;

[0769] The time-frequency domain resources of the random access resources associated with the aforementioned on-demand reference signals;

[0770] Physical random access channel configuration index;

[0771] First offset value.

[0772] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signal indicated by the above-mentioned indication signaling include at least one of the following:

[0773] Random access resources determined based on the time-frequency domain location of the first target;

[0774] Random access resources determined based on the first offset value and the time-frequency domain location of the first target;

[0775] The random access resources indicated by the above physical random access channel configuration index;

[0776] Random access resources that do not overlap with the random access resources associated with the first type of SSB mentioned above;

[0777] The random access resources associated with the third SSB index mentioned above.

[0778] Optionally, in some embodiments of this application, the radio frequency device 92 is further configured to send configuration information to the terminal, wherein the configuration information is configured to configure the random access resources associated with the on-demand reference signal.

[0779] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signals configured by the network-side device include at least one of the following:

[0780] Random access resources determined based on the time-frequency domain location of the second target;

[0781] Random access resources determined based on the first offset value and the time-frequency domain location of the second target;

[0782] The random access resources indicated by the above physical random access channel configuration index;

[0783] Random access resources that do not overlap with the random access resources associated with the first type of SSB mentioned above;

[0784] The random access resources associated with the fourth SSB index mentioned above;

[0785] The time-frequency domain resources of the random access resources associated with the aforementioned on-demand reference signals;

[0786] Random access resources determined based on the third offset value of the aforementioned radio frame position;

[0787] Random access resources determined based on subframe sequence number;

[0788] Random access resources determined by the start symbol;

[0789] Random access resources are determined based on the random access resource configuration period.

[0790] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signal are located within one or more frequency domain resources; the frequency domain resources include at least one of the following: frequency domain unit, frequency domain subband, carrier, and bandwidth portion.

[0791] Optionally, in some embodiments of this application, the random access resource associated with the on-demand reference signal is an additional random access resource, which is a dynamically activated random access resource.

[0792] Optionally, in some embodiments of this application, the aforementioned additional random access resources are activated when the second condition is met;

[0793] The second condition above includes at least one of the following:

[0794] The aforementioned on-demand reference signal is activated;

[0795] The aforementioned terminal receives information instructing the activation of additional random access resources associated with the aforementioned on-demand reference signal;

[0796] At least two of the above terminals are quasi-co-located to the same first type SSB using their first on-demand reference signals;

[0797] The number of random access resources associated with the first type of SSB is less than the first threshold value;

[0798] The number of terminals requesting the above-mentioned on-demand reference signal is greater than the second threshold value;

[0799] The multicast signaling indicates the activation of the aforementioned on-demand reference signal;

[0800] The aforementioned on-demand reference signal is independent of the random access resources associated with the aforementioned first type of SSB;

[0801] The congestion level of the random access resources associated with the first type of SSB mentioned above is greater than the third threshold.

[0802] Optionally, in some embodiments of this application, the radio frequency device 92 is further configured to send a first signaling to the terminal, the first signaling including information indicating the activation of additional random access resources associated with the first on-demand reference signal and information indicating the activation of the first on-demand reference signal.

[0803] Optionally, in some embodiments of this application, the additional random access resources are associated with both the first type of SSB and the on-demand reference signal.

[0804] Optionally, in some embodiments of this application, the additional random access resources described above are only associated with the on-demand reference signals described above.

[0805] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signals described above are valid random access resources if a first condition is met.

[0806] The first condition mentioned above includes at least one of the following:

[0807] The difference between the time domain location of the random access resource associated with the aforementioned on-demand reference signal and the time domain location of the first on-demand reference signal of the aforementioned terminal is no greater than the fourth threshold value, and the aforementioned first on-demand reference signal is one of the on-demand reference signals received by the aforementioned terminal;

[0808] The random access resources associated with the aforementioned on-demand reference signal are activated;

[0809] The random access resources associated with the aforementioned on-demand reference signals are configured by the network-side equipment.

[0810] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signal are activated after the first reference time or after time T1 has elapsed from the first reference time.

[0811] Optionally, in some embodiments of this application, the first reference time mentioned above is any one of the following:

[0812] The transmission start time of the aforementioned on-demand reference signal;

[0813] The terminal receives the fourth indication information at the time of receiving the fourth indication information, which is used to inform the terminal that the network-side device will send an on-demand reference signal.

[0814] The terminal sends the fifth instruction information at the time of transmission. The fifth instruction information is used to request the network-side device to send an on-demand reference signal.

[0815] The moment when the aforementioned terminal receives the first valid on-demand reference signal;

[0816] The time at which the candidate location for the first additional random access resource after the scheduled time is located;

[0817] The first time unit of the first cycle in which the scheduled time occurs;

[0818] The first time unit of the first cycle after the first cycle in which the scheduled time occurs.

[0819] Optionally, in some embodiments of this application, the first cycle is at least one of the following: inactive discontinuous reception I-DRX cycle, connected discontinuous reception C-DRX cycle, SSB-RO mapping cycle, SSB-RO association cycle, SSB-RO association pattern cycle, and system information SI modification cycle.

[0820] Optionally, in some embodiments of this application, the predetermined time includes at least one of the following:

[0821] The transmission time of the aforementioned first on-demand reference signal;

[0822] The terminal receives the fourth indication information at the time of receiving the fourth indication information, which is used to inform the terminal that the network-side device will send an on-demand reference signal.

[0823] The terminal sends the fifth instruction information at the time of transmission. The fifth instruction information is used to request the network-side device to send an on-demand reference signal.

[0824] The moment when the aforementioned terminal receives the first valid on-demand reference signal.

[0825] Optionally, in some embodiments of this application, the random access resources associated with the on-demand reference signal are deactivated after the second reference time or after time T2 has elapsed from the second reference time.

[0826] Optionally, in some embodiments of this application, the second reference time mentioned above is any one of the following:

[0827] The end time of transmission of the aforementioned on-demand reference signal;

[0828] Deactivate the on-demand reference signaling reception time;

[0829] The time indicated by the network-side device;

[0830] The last time unit of the first cycle in which the last of the aforementioned first on-demand reference signals is located;

[0831] The first time unit of the next first cycle in which the last of the aforementioned first on-demand reference signals is located;

[0832] The moment when the random access procedure ends;

[0833] The moment after the aforementioned terminal sends the feedback Msg4;

[0834] The moment when the aforementioned terminal receives Msg5;

[0835] The moment when the aforementioned terminal receives the Radio Resource Control (RRC) connection completion message;

[0836] The time after the aforementioned terminal sends Msg1;

[0837] The timing of candidate cells for Layer 1 mobility management is determined in advance;

[0838] The time after the aforementioned terminal performs the cell handover operation;

[0839] The moment when the aforementioned terminal received the cell handover command.

[0840] In the network-side device provided in this application embodiment, the network-side device indicates or configures a random access resource associated with an on-demand reference signal to the terminal. The random access resource associated with the on-demand reference signal is at least one of the following: a random access resource associated with a first type SSB, where the first type SSB is a periodically transmitted SSB; a random access resource associated with an on-demand reference signal indicated by the network-side device through indication signaling; or a random access resource associated with an on-demand reference signal configured by the network-side device. In this solution, the network-side device can indicate or configure the random access resource associated with the on-demand reference signal to the terminal, enabling the terminal to initiate random access on that random access resource to execute a random access procedure.

[0841] Furthermore, the network-side device 900 in this embodiment of the application also includes: a program or instructions stored in a memory 95 and executable on a processor 94, wherein the processor 94 calls the program or instructions in the memory 95 to execute. Figure 12 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0842] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described random access method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0843] The processor mentioned above is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0844] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described random access method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0845] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0846] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described random access method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0847] This application also provides a communication system, including: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the random access method described above, and the network-side device can be used to perform the steps of the random access method described above.

[0848] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the presence of additional identical elements in the process, method, article, or apparatus that includes that element is not excluded. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0849] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.), and the computer software product includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0850] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A random access method, characterized in that, include: The terminal performs random access based on the random access resources associated with the on-demand reference signal; The random access resource associated with the on-demand reference signal is at least one of the following: The random access resources associated with the first type of synchronization signal block (SSB), wherein the first type of SSB is a periodically transmitted SSB; The random access resources associated with the on-demand reference signal indicated by the instruction signaling; Random access resources associated with on-demand reference signals configured on network-side devices.

2. The method according to claim 1, characterized in that, The random access resources associated with the first type of SSB include at least one of the following: The first SSB index maps some or all of the random access resources, and the first SSB index is the index of a first type of SSB that is the same as the index of the first on-demand reference signal; The second SSB index maps some or all of the random access resources, and the second SSB index is an index of a first type of SSB that is quasi-co-located with the first on-demand reference signal; Wherein, the first on-demand reference signal is one of the on-demand reference signals.

3. The method according to claim 2, characterized in that, The SSB corresponding to the second SSB index is quasi-co-located with multiple first on-demand reference signals. Among the random access resources mapped by the second SSB index, some or all of the random access resources associated with the first on-demand reference signals are determined based on at least one of the following: The order of the indices of the plurality of first on-demand reference signals; The resource range of the random access resources associated with the second SSB index as specified in the agreement or indicated by the signaling.

4. The method according to claim 1, characterized in that, The instruction signaling indicates at least one of the following: The third SSB index is either the index of the first type of SSB or the index of the on-demand reference signal; The random access resources associated with the third SSB index; The time-frequency domain resources of the random access resources associated with the on-demand reference signal; Physical random access channel configuration index; First offset value.

5. The method according to claim 4, characterized in that, The random access resources associated with the on-demand reference signal indicated by the indication signaling include at least one of the following: Random access resources determined based on the time-frequency domain location of the first target; Random access resources determined based on the first offset value and the time-frequency domain location of the first target; The random access resources indicated by the physical random access channel configuration index; Random access resources that do not overlap with random access resources associated with the first type of SSB; The random access resources associated with the third SSB index.

6. The method according to claim 5, characterized in that, The time-frequency domain location of the first target is at least one of the following: The time-frequency domain location of the random access resource associated with the first type of SSB; The time-frequency domain location of the random access resource associated with the on-demand reference signal; The time-frequency domain location of the random access resource indicated by the physical random access channel configuration index; The time-frequency domain position of the first on-demand reference signal of the terminal, wherein the first on-demand reference signal is one of the on-demand reference signals received by the terminal.

7. The method according to claim 1, characterized in that, The method further includes: The terminal receives configuration information sent by the network-side device, the configuration information being used to configure the random access resources associated with the on-demand reference signal; The configuration information includes at least one of the following: The fourth SSB index is either the index of the first type of SSB or the index of the on-demand reference signal; The random access resources associated with the fourth SSB index; The time-frequency domain resources of the random access resources associated with the on-demand reference signal; Physical random access channel configuration index; Second offset value; The third offset value of the wireless frame position; Subframe number; Start symbol; Random access resource configuration cycle; On-demand reference signal mapping period to RO; The correlation period between the reference signal and RO on demand; The period of the correlation pattern between the reference signal and RO on demand.

8. The method according to claim 7, characterized in that, The random access resources associated with the on-demand reference signal configured by the network-side device include at least one of the following: Random access resources determined based on the time-frequency domain location of the second target; Random access resources determined based on the first offset value and the time-frequency domain location of the second target; The random access resources indicated by the physical random access channel configuration index; Random access resources that do not overlap with random access resources associated with the first type of SSB; The random access resources associated with the fourth SSB index; The time-frequency domain resources of the random access resources associated with the on-demand reference signal; Random access resources determined based on the third offset value of the radio frame position; Random access resources determined based on subframe sequence number; Random access resources determined by the start symbol; Random access resources are determined based on the random access resource configuration period.

9. The method according to claim 8, characterized in that, The second target's time-frequency domain location is at least one of the following: The time-frequency domain location of the random access resource associated with the first type of SSB; The time-frequency domain location of the random access resource associated with the on-demand reference signal; The time-frequency domain location of the random access resource indicated by the physical random access channel configuration index; The time-frequency domain position of the first on-demand reference signal of the terminal, wherein the first on-demand reference signal is one of the on-demand reference signals received by the terminal.

10. The method according to any one of claims 1 to 9, characterized in that, The random access resources associated with the on-demand reference signal are located within one or more frequency domain resources; the frequency domain resources include at least one of the following: frequency domain unit, frequency domain subband, carrier, and bandwidth portion.

11. The method according to claim 1, characterized in that, The random access resources associated with the on-demand reference signal are additional random access resources, which are dynamically activated random access resources.

12. The method according to claim 11, characterized in that, The additional random access resources are activated if the second condition is met; The second condition includes at least one of the following: The on-demand reference signal is activated; The terminal receives information indicating the activation of additional random access resources associated with the on-demand reference signal; At least two of the terminals are quasi-co-located to the same first type SSB; The number of random access resources associated with the first type of SSB is less than the first threshold value; The number of terminals requesting the on-demand reference signal is greater than the second threshold value; The multicast signaling indicates the activation of the on-demand reference signal; The on-demand reference signal is independent of the random access resources associated with the first type of SSB; The congestion level of the random access resources associated with the first type of SSB is greater than the third threshold.

13. The method according to claim 12, characterized in that, The method further includes: The terminal receives a first signaling message, the first signaling message including information indicating the activation of additional random access resources associated with the first on-demand reference signal and information indicating the activation of the first on-demand reference signal.

14. The method according to any one of claims 11 to 13, characterized in that, The additional random access resources are associated with both the first type of SSB and the on-demand reference signal.

15. The method according to any one of claims 11 to 13, characterized in that, The additional random access resources are only associated with the on-demand reference signal.

16. The method according to claims 1 to 15, characterized in that, The random access resource associated with the on-demand reference signal is a valid random access resource if the first condition is met. The first condition includes at least one of the following: The difference between the time domain location of the random access resource associated with the on-demand reference signal and the time domain location of the terminal's first on-demand reference signal is no greater than a fourth threshold value, and the first on-demand reference signal is one of the on-demand reference signals received by the terminal. The random access resources associated with the on-demand reference signal are activated; The random access resources associated with the on-demand reference signal are configured by the network-side equipment.

17. The method according to claim 16, characterized in that, The random access resources associated with the on-demand reference signal are activated after the first reference time or after time T1 elapsed from the first reference time. Wherein, the first reference time is any one of the following: The transmission start time of the on-demand reference signal; The terminal receives the fourth indication information at the time of reception, and the fourth indication information is used to inform the terminal that the network-side device will send an on-demand reference signal. The terminal sends the fifth indication information at the time of transmission, and the fifth indication information is used to request the network-side device to send an on-demand reference signal. The moment when the terminal receives the first valid on-demand reference signal; The time at which the candidate location for the first additional random access resource after the scheduled time is located; The first time unit of the first cycle in which the scheduled time occurs; The first time unit of the first cycle after the first cycle in which the scheduled time occurs.

18. The method according to claim 17, characterized in that, The first cycle is at least one of the following: inactive discontinuous reception I-DRX cycle, connected discontinuous reception C-DRX cycle, SSB-RO mapping cycle, SSB-RO association cycle, SSB-RO association pattern cycle, and system information SI modification cycle.

19. The method according to claim 17, characterized in that, The scheduled time includes at least one of the following: The transmission time of the first on-demand reference signal; The terminal receives the fourth indication information at the time of reception, and the fourth indication information is used to inform the terminal that the network-side device will send an on-demand reference signal. The terminal sends the fifth indication information at the time of transmission, and the fifth indication information is used to request the network-side device to send an on-demand reference signal. The moment when the terminal receives the first valid on-demand reference signal.

20. The method according to claim 16, characterized in that, The random access resources associated with the on-demand reference signal are deactivated after the second reference time or after time T2 from the second reference time. The second reference time is any one of the following: The transmission end time of the on-demand reference signal; Deactivate the on-demand reference signaling reception time; The time indicated by the network-side device; The last time unit of the first cycle in which the last first on-demand reference signal is located; The first time unit of the next first cycle in which the last first on-demand reference signal is located; The moment when the random access procedure ends; The time after the terminal sends the feedback Msg4; The moment when the terminal receives Msg5; The moment when the terminal receives the Radio Resource Control (RRC) connection completion message; The time after the terminal sends Msg1; The timing of candidate cells for Layer 1 mobility management is determined in advance; The time after the terminal performs a cell handover operation; The moment when the terminal receives the cell handover command.

21. A random access method, characterized in that, include: Network-side devices indicate or configure random access resources associated with on-demand reference signals to the terminal; The random access resource associated with the on-demand reference signal is at least one of the following: The random access resources associated with the first type of SSB, wherein the first type of SSB is a periodically sent SSB; The network-side device associates random access resources with the on-demand reference signal indicated by the instruction signaling; The random access resources associated with the on-demand reference signal configured by the network-side device.

22. The method according to claim 21, characterized in that, The instruction signaling indicates at least one of the following: The third SSB index is either the index of the first type of SSB or the index of the on-demand reference signal; The random access resources associated with the third SSB index; The time-frequency domain resources of the random access resources associated with the on-demand reference signal; Physical random access channel configuration index; First offset value.

23. The method according to claim 22, characterized in that, The random access resources associated with the on-demand reference signal indicated by the indication signaling include at least one of the following: Random access resources determined based on the time-frequency domain location of the first target; Random access resources determined based on the first offset value and the time-frequency domain location of the first target; The random access resources indicated by the physical random access channel configuration index; Random access resources that do not overlap with random access resources associated with the first type of SSB; The random access resources associated with the third SSB index.

24. The method according to claim 21, characterized in that, The method further includes: The network-side device sends configuration information to the terminal, the configuration information being used to configure the random access resources associated with the on-demand reference signal.

25. The method according to claim 24, characterized in that, The random access resources associated with the on-demand reference signal configured by the network-side device include at least one of the following: Random access resources determined based on the time-frequency domain location of the second target; Random access resources determined based on the first offset value and the time-frequency domain location of the second target; The random access resources indicated by the physical random access channel configuration index; Random access resources that do not overlap with random access resources associated with the first type of SSB; The random access resources associated with the fourth SSB index; The time-frequency domain resources of the random access resources associated with the on-demand reference signal; Random access resources determined based on the third offset value of the radio frame position; Random access resources determined based on subframe sequence number; Random access resources determined by the start symbol; Random access resources are determined based on the random access resource configuration period.

26. The method according to any one of claims 21 to 25, characterized in that, The random access resources associated with the on-demand reference signal are located within one or more frequency domain resources; the frequency domain resources include at least one of the following: frequency domain unit, frequency domain subband, carrier, and bandwidth portion.

27. The method according to claim 21, characterized in that, The random access resources associated with the on-demand reference signal are additional random access resources, which are dynamically activated random access resources.

28. The method according to claim 27, characterized in that, The additional random access resources are activated if the second condition is met; The second condition includes at least one of the following: The on-demand reference signal is activated; The terminal receives information indicating the activation of additional random access resources associated with the on-demand reference signal; At least two of the terminals are quasi-co-located to the same first type SSB; The number of random access resources associated with the first type of SSB is less than the first threshold value; The number of terminals requesting the on-demand reference signal is greater than the second threshold value; The multicast signaling indicates the activation of the on-demand reference signal; The on-demand reference signal is independent of the random access resources associated with the first type of SSB; The congestion level of the random access resources associated with the first type of SSB is greater than the third threshold.

29. The method according to claim 28, characterized in that, The method further includes: The network-side device sends a first signaling message to the terminal. The first signaling message includes information indicating the activation of additional random access resources associated with the first on-demand reference signal and information indicating the activation of the first on-demand reference signal.

30. The method according to any one of claims 27 to 29, characterized in that, The additional random access resources are associated with both the first type of SSB and the on-demand reference signal.

31. The method according to any one of claims 27 to 29, characterized in that, The additional random access resources are only associated with the on-demand reference signal.

32. The method according to claims 21 to 31, characterized in that, The random access resource associated with the on-demand reference signal is a valid random access resource if the first condition is met. The first condition includes at least one of the following: The difference between the time domain location of the random access resource associated with the on-demand reference signal and the time domain location of the terminal's first on-demand reference signal is no greater than a fourth threshold value, and the first on-demand reference signal is one of the on-demand reference signals received by the terminal. The random access resources associated with the on-demand reference signal are activated; The random access resources associated with the on-demand reference signal are configured by the network-side equipment.

33. The method according to claim 32, characterized in that, The random access resources associated with the on-demand reference signal are activated after the first reference time or after time T1 elapsed from the first reference time. Wherein, the first reference time is any one of the following: The transmission start time of the on-demand reference signal; The terminal receives the fourth indication information at the time of reception, and the fourth indication information is used to inform the terminal that the network-side device will send an on-demand reference signal. The terminal sends the fifth indication information at the time of transmission, and the fifth indication information is used to request the network-side device to send an on-demand reference signal. The moment when the terminal receives the first valid on-demand reference signal; The time at which the candidate location for the first additional random access resource after the scheduled time is located; The first time unit of the first cycle in which the scheduled time occurs; The first time unit of the first cycle after the first cycle in which the scheduled time occurs.

34. The method according to claim 33, characterized in that, The first cycle is at least one of the following: I-DRX cycle, C-DRX cycle, SSB-RO mapping cycle, SSB-RO association cycle, SSB-RO association pattern cycle, SI modification cycle.

35. The method according to claim 34, characterized in that, The scheduled time includes at least one of the following: The transmission time of the first on-demand reference signal; The terminal receives the fourth indication information at the time of reception, and the fourth indication information is used to inform the terminal that the network-side device will send an on-demand reference signal. The terminal sends the fifth indication information at the time of transmission, and the fifth indication information is used to request the network-side device to send an on-demand reference signal. The moment when the terminal receives the first valid on-demand reference signal.

36. The method according to claim 32, characterized in that, The random access resources associated with the on-demand reference signal are deactivated after the second reference time or after time T2 from the second reference time. The second reference time is any one of the following: The transmission end time of the on-demand reference signal; Deactivate the on-demand reference signaling reception time; The time indicated by the network-side device; The last time unit of the first cycle in which the last first on-demand reference signal is located; The first time unit of the next first cycle in which the last first on-demand reference signal is located; The moment when the random access procedure ends; The time after the terminal sends the feedback Msg4; The moment when the terminal receives Msg5; The moment when the terminal receives the Radio Resource Control (RRC) connection completion message; The time after the terminal sends Msg1; The timing of candidate cells for Layer 1 mobility management is determined in advance; The time after the terminal performs a cell handover operation; The moment when the terminal receives the cell handover command.

37. A random access device, characterized in that, include: Processing module; The processing module is used to perform random access based on the random access resources associated with the on-demand reference signal; The random access resource associated with the on-demand reference signal is at least one of the following: The random access resources associated with the first type of SSB, wherein the first type of SSB is a periodically sent SSB; The random access resources associated with the on-demand reference signal indicated by the instruction signaling; Random access resources associated with on-demand reference signals configured on network-side devices.

38. The apparatus according to claim 37, characterized in that, The random access resources associated with the first type of SSB include at least one of the following: The first SSB index maps some or all of the random access resources, and the first SSB index is the index of a first type of SSB that is the same as the index of the first on-demand reference signal; The second SSB index maps some or all of the random access resources, and the second SSB index is an index of a first type of SSB that is quasi-co-located with the first on-demand reference signal; Wherein, the first on-demand reference signal is one of the on-demand reference signals.

39. The apparatus according to claim 37, characterized in that, The instruction signaling indicates at least one of the following: The third SSB index is either the index of the first type of SSB or the index of the on-demand reference signal; The random access resources associated with the third SSB index; The time-frequency domain resources of the random access resources associated with the on-demand reference signal; Physical random access channel configuration index; First offset value.

40. The apparatus according to claim 39, characterized in that, The random access resources associated with the on-demand reference signal indicated by the indication signaling include at least one of the following: Random access resources determined based on the time-frequency domain location of the first target; Random access resources determined based on the first offset value and the time-frequency domain location of the first target; The random access resources indicated by the physical random access channel configuration index; Random access resources that do not overlap with random access resources associated with the first type of SSB; The random access resources associated with the third SSB index.

41. The apparatus according to claim 37, characterized in that, The device further includes: a receiving module; The receiving module is used to receive configuration information sent by the network-side device, the configuration information being used to configure the random access resources associated with the on-demand reference signal; The configuration information includes at least one of the following: The fourth SSB index is either the index of the first type of SSB or the index of the on-demand reference signal; The random access resources associated with the fourth SSB index; The time-frequency domain resources of the random access resources associated with the on-demand reference signal; Physical random access channel configuration index; Second offset value; The third offset value of the wireless frame position; Subframe number; Start symbol; Random access resource configuration cycle; On-demand reference signal mapping period to RO; The correlation period between the reference signal and RO on demand; The period of the correlation pattern between the reference signal and RO on demand.

42. The apparatus according to claim 41, characterized in that, The random access resources associated with the on-demand reference signal configured by the network-side device include at least one of the following: Random access resources determined based on the time-frequency domain location of the second target; Random access resources determined based on the first offset value and the time-frequency domain location of the second target; The random access resources indicated by the physical random access channel configuration index; Random access resources that do not overlap with random access resources associated with the first type of SSB; The random access resources associated with the fourth SSB index; The time-frequency domain resources of the random access resources associated with the on-demand reference signal; Random access resources determined based on the third offset value of the radio frame position; Random access resources determined based on subframe sequence number; Random access resources determined by the start symbol; Random access resources are determined based on the random access resource configuration period.

43. The apparatus according to claim 37, characterized in that, The random access resources associated with the on-demand reference signal are additional random access resources, which are dynamically activated random access resources.

44. The apparatus according to claim 43, characterized in that, The additional random access resources are activated if the second condition is met; The second condition includes at least one of the following: The on-demand reference signal is activated; The terminal receives information indicating the activation of additional random access resources associated with the on-demand reference signal; At least two of the terminals are quasi-co-located to the same first type SSB; The number of random access resources associated with the first type of SSB is less than the first threshold value; The number of terminals requesting the on-demand reference signal is greater than the second threshold value; The multicast signaling indicates the activation of the on-demand reference signal; The on-demand reference signal is independent of the random access resources associated with the first type of SSB; The congestion level of the random access resources associated with the first type of SSB is greater than the third threshold.

45. The apparatus according to claims 37 to 44, characterized in that, The random access resource associated with the on-demand reference signal is a valid random access resource if the first condition is met. The first condition includes at least one of the following: The difference between the time domain location of the random access resource associated with the on-demand reference signal and the time domain location of the terminal's first on-demand reference signal is no greater than a fourth threshold value, and the first on-demand reference signal is one of the on-demand reference signals received by the terminal. The random access resources associated with the on-demand reference signal are activated; The random access resources associated with the on-demand reference signal are configured by the network-side equipment.

46. ​​The apparatus according to claim 45, characterized in that, The random access resources associated with the on-demand reference signal are activated after the first reference time or after time T1 elapsed from the first reference time. Wherein, the first reference time is any one of the following: The transmission start time of the on-demand reference signal; The terminal receives the fourth indication information at the time of reception, and the fourth indication information is used to inform the terminal that the network-side device will send an on-demand reference signal. The terminal sends the fifth indication information at the time of transmission, and the fifth indication information is used to request the network-side device to send an on-demand reference signal. The moment when the terminal receives the first valid on-demand reference signal; The time at which the candidate location for the first additional random access resource after the scheduled time is located; The first time unit of the first cycle in which the scheduled time occurs; The first time unit of the first cycle after the first cycle in which the scheduled time occurs.

47. The apparatus according to claim 45, characterized in that, The random access resources associated with the on-demand reference signal are deactivated after the second reference time or after time T2 from the second reference time. The second reference time is any one of the following: The transmission end time of the on-demand reference signal; Deactivate the on-demand reference signaling reception time; The time indicated by the network-side device; The last time unit of the first cycle in which the last first on-demand reference signal is located; The first time unit of the next first cycle in which the last first on-demand reference signal is located; The moment when the random access procedure ends; The time after the terminal sends the feedback Msg4; The moment when the terminal receives Msg5; The moment when the terminal receives the Radio Resource Control (RRC) connection completion message; The time after the terminal sends Msg1; The timing of candidate cells for Layer 1 mobility management is determined in advance; The time after the terminal performs a cell handover operation; The moment when the terminal receives the cell handover command.

48. A random access device, characterized in that, include: Sending module; The sending module is used to indicate or configure the random access resources associated with the on-demand reference signal to the terminal; The random access resource associated with the on-demand reference signal is at least one of the following: The random access resources associated with the first type of SSB, wherein the first type of SSB is a periodically sent SSB; The network-side device associates random access resources with the on-demand reference signal indicated by the instruction signaling; The random access resources associated with the on-demand reference signal configured by the network-side device.

49. The apparatus according to claim 48, characterized in that, The instruction signaling indicates at least one of the following: The third SSB index is either the index of the first type of SSB or the index of the on-demand reference signal; The random access resources associated with the third SSB index; The time-frequency domain resources of the random access resources associated with the on-demand reference signal; Physical random access channel configuration index; First offset value.

50. The apparatus according to claim 49, characterized in that, The random access resources associated with the on-demand reference signal indicated by the indication signaling include at least one of the following: Random access resources determined based on the time-frequency domain location of the first target; Random access resources determined based on the first offset value and the time-frequency domain location of the first target; The random access resources indicated by the physical random access channel configuration index; Random access resources that do not overlap with random access resources associated with the first type of SSB; The random access resources associated with the third SSB index.

51. The apparatus according to claim 48, characterized in that, The sending module is further configured to send configuration information to the terminal, the configuration information being used to configure the random access resources associated with the on-demand reference signal.

52. The apparatus according to claim 51, characterized in that, The random access resources associated with the on-demand reference signal configured by the network-side device include at least one of the following: Random access resources determined based on the time-frequency domain location of the second target; Random access resources determined based on the first offset value and the time-frequency domain location of the second target; The random access resources indicated by the physical random access channel configuration index; Random access resources that do not overlap with random access resources associated with the first type of SSB; The random access resources associated with the fourth SSB index; The time-frequency domain resources of the random access resources associated with the on-demand reference signal; Random access resources determined based on the third offset value of the radio frame position; Random access resources determined based on subframe sequence number; Random access resources determined by the start symbol; Random access resources are determined based on the random access resource configuration period.

53. The apparatus according to claim 48, characterized in that, The random access resources associated with the on-demand reference signal are additional random access resources, which are dynamically activated random access resources.

54. The apparatus according to claim 53, characterized in that, The additional random access resources are activated if the second condition is met; The second condition includes at least one of the following: The on-demand reference signal is activated; The terminal receives information indicating the activation of additional random access resources associated with the on-demand reference signal; At least two of the terminals are quasi-co-located to the same first type SSB; The number of random access resources associated with the first type of SSB is less than the first threshold value; The number of terminals requesting the on-demand reference signal is greater than the second threshold value; The multicast signaling indicates the activation of the on-demand reference signal; The on-demand reference signal is independent of the random access resources associated with the first type of SSB; The congestion level of the random access resources associated with the first type of SSB is greater than the third threshold.

55. The apparatus according to claims 48 to 54, characterized in that, The random access resource associated with the on-demand reference signal is a valid random access resource if the first condition is met. The first condition includes at least one of the following: The difference between the time domain location of the random access resource associated with the on-demand reference signal and the time domain location of the terminal's first on-demand reference signal is no greater than a fourth threshold value, and the first on-demand reference signal is one of the on-demand reference signals received by the terminal. The random access resources associated with the on-demand reference signal are activated; The random access resources associated with the on-demand reference signal are configured by the network-side equipment.

56. The apparatus according to claim 55, characterized in that, The random access resources associated with the on-demand reference signal are activated after the first reference time or after time T1 elapsed from the first reference time. Wherein, the first reference time is any one of the following: The transmission start time of the on-demand reference signal; The terminal receives the fourth indication information at the time of reception, and the fourth indication information is used to inform the terminal that the network-side device will send an on-demand reference signal. The terminal sends the fifth indication information at the time of transmission, and the fifth indication information is used to request the network-side device to send an on-demand reference signal. The moment when the terminal receives the first valid on-demand reference signal; The time at which the candidate location for the first additional random access resource after the scheduled time is located; The first time unit of the first cycle in which the scheduled time occurs; The first time unit of the first cycle after the first cycle in which the scheduled time occurs.

57. The apparatus according to claim 55, characterized in that, The random access resources associated with the on-demand reference signal are deactivated after the second reference time or after time T2 from the second reference time. The second reference time is any one of the following: The transmission end time of the on-demand reference signal; Deactivate the on-demand reference signaling reception time; The time indicated by the network-side device; The last time unit of the first cycle in which the last first on-demand reference signal is located; The first time unit of the next first cycle in which the last first on-demand reference signal is located; The moment when the random access procedure ends; The time after the terminal sends the feedback Msg4; The moment when the terminal receives Msg5; The moment when the terminal receives the Radio Resource Control (RRC) connection completion message; The time after the terminal sends Msg1; The timing of candidate cells for Layer 1 mobility management is determined in advance; The time after the terminal performs a cell handover operation; The moment when the terminal receives the cell handover command.

58. A terminal, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the random access method as described in any one of claims 1 to 20.

59. A network-side device, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the random access method as described in any one of claims 21 to 36.

60. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the random access method as described in any one of claims 1 to 20, or implement the steps of the random access method as described in any one of claims 21 to 36.

Images