Method and device for determining and indicating PRACH (Physical Random Access Channel) resource, terminal and network side equipment

Abstract

The invention discloses a PRACH (Physical Random Access Channel) resource determination and indication method and device, a terminal and network side equipment, and belongs to the technical field of communication. The PRACH resource determination method provided by the embodiment of the invention comprises the following steps: a terminal acquires first information; the terminal determines a PRACH resource according to the first information; wherein the first information indicates at least one of the following items: configuration or reconfiguration information of a PRACH resource; updating information of the PRACH resource; and time-frequency domain information of the PRACH resource. According to the embodiment of the invention, network energy saving can be realized.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a PRACH resource determination and indication method, apparatus, terminal, and network-side equipment. Background Art

[0002] Network energy saving is of great significance for environmental sustainability, reducing environmental impact (greenhouse gas emissions) and saving operating costs. th As 5G (5th Generation) communications systems become ubiquitous across industries and regions, they will need to handle more advanced services and applications with very high data rates. Networks will become denser, using more antennas, greater bandwidth, and more frequency bands. The environmental impact of 5G will need to be kept under control, and new solutions will need to be developed to improve network energy efficiency.

[0003] Furthermore, energy consumption has become a critical component of operators' operating expenses (OPEX). Mobile network energy costs account for approximately 23% of operators' total costs, with the majority of this energy consumption coming from the radio access network, particularly active antenna units (AAUs), with data centers and fiber optic transmission contributing smaller shares. Radio access power consumption can be divided into two components: a dynamic component consumed only during data transmission and / or reception, and a static component consumed at all times to maintain radio access equipment operation, even when data transmission and / or reception is not in progress. Minimizing the power consumption of this static component is a technical challenge that needs to be addressed. In particular, the PRACH resources used for random access by terminals have a slow update rate and are unable to cope with scenarios with large and rapidly fluctuating system loads. When there are few terminals, the network needs to continuously monitor these resources, even if most are unused, resulting in wasted power. Summary of the Invention

[0004] The embodiments of the present application provide a PRACH resource determination and indication method, apparatus, terminal, and network-side equipment, which can achieve network energy saving.

[0005] In a first aspect, a method for determining a PRACH resource is provided, which is performed by a terminal. The method includes:

[0006] The terminal obtains the first information;

[0007] The terminal determines a PRACH resource according to the first information;

[0008] The first information indicates at least one of the following:

[0009] Configuration or reconfiguration information of PRACH resources;

[0010] Update information of PRACH resources;

[0011] Time-frequency domain information of PRACH resources.

[0012] In a second aspect, a PRACH resource indication method is provided, which is performed by a network-side device. The method includes:

[0013] The network side device indicates first information to the terminal, where the first information is used to determine a PRACH resource;

[0014] The first information indicates at least one of the following:

[0015] Configuration or reconfiguration information of PRACH resources;

[0016] Update information of PRACH resources;

[0017] Time-frequency domain information of PRACH resources.

[0018] In a third aspect, a PRACH resource determination device is provided, which is applied to a terminal and includes:

[0019] An acquisition module, configured to acquire first information;

[0020] a processing module, configured to determine a PRACH resource according to the first information;

[0021] The first information indicates at least one of the following:

[0022] Configuration or reconfiguration information of PRACH resources;

[0023] Update information of PRACH resources;

[0024] Time-frequency domain information of PRACH resources.

[0025] In a fourth aspect, a PRACH resource indication device is provided, which is applied to a network-side device, including:

[0026] a sending module, configured to indicate first information to a terminal, where the first information is used to determine a PRACH resource;

[0027] The first information indicates at least one of the following:

[0028] Configuration or reconfiguration information of PRACH resources;

[0029] Update information of PRACH resources;

[0030] Time-frequency domain information of PRACH resources.

[0031] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0032] According to a sixth aspect, a terminal is provided, including a processor and a communication interface, wherein the communication interface is configured to obtain first information; and the processor is configured to determine a PRACH resource based on the first information.

[0033] The first information indicates at least one of the following:

[0034] Configuration or reconfiguration information of PRACH resources;

[0035] Update information of PRACH resources;

[0036] Time-frequency domain information of PRACH resources.

[0037] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0038] In an eighth aspect, a network-side device is provided, including a processor and a communication interface, wherein the communication interface is configured to indicate first information to a terminal, where the first information is used to determine a PRACH resource;

[0039] The first information indicates at least one of the following:

[0040] Configuration or reconfiguration information of PRACH resources;

[0041] Update information of PRACH resources;

[0042] Time-frequency domain information of PRACH resources.

[0043] In the ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0044] In the tenth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0045] In the eleventh aspect, a chip is provided, which includes 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 the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0046] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor 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.

[0047] In an embodiment of the present application, the terminal can determine the PRACH resource through the first information, so that the adaptive change information of the PRACH resource can be indicated by the first information to determine the latest available PRACH resource. The network side adjusts the PRACH resources to adjust which resources the terminal initiates the random access process on, thereby changing the number and time of detection and adjusting the sleep time to save energy on the network side. For example, the network side can first configure fewer RACH resources so that the terminals all perform random access on these PRACH resources to save power and achieve network energy saving; when there are more RACH requests or a large number of terminals, more PRACH resources can be activated through the first information to reduce the probability of RACH collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a block diagram of a wireless communication system to which embodiments of the present application may be applied;

[0049] Figure 2 and Figure 3 Schematic diagram of the association between RO and SSB;

[0050] Figure 4 This is a flowchart of a method for determining PRACH resources provided by an embodiment of the present application;

[0051] Figure 5 This is a flowchart of a PRACH resource indication method provided by an embodiment of the present application;

[0052] Figure 6 This is a structural diagram of a PRACH resource determination device provided in an embodiment of the present application;

[0053] Figure 7 This is a structural diagram of a PRACH resource indication device provided in an embodiment of the present application;

[0054] Figure 8 This is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0055] Figure 9 This is a schematic diagram of the structure of a terminal provided in an embodiment of the present application;

[0056] Figure 10 It is a structural diagram of a network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0057] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0058] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0059] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication 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 operation to be performed or the requested result, etc. based on the judgment result.

[0060] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0061] Figure 1The block diagram of a wireless communication system applicable to the embodiments of the present application is shown. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle user equipment (VUE), a ship-borne device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture, etc.), a game console, a personal computer (PC), a teller machine, or a self-service machine, etc., and other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AP) or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the 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 (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0062] The core network equipment may include but is not limited to at least one of the following: core network node, core network function, mobility management entity (MME), access mobility management function (AMF), session management function (SMF), user plane function (UPF), policy control function (PCF), policy and charging rules function unit (PCRF), edge application service discovery function (EASDF), unified data management (UDM), unified data repository (UDR), home user server (HSS), centralized network configuration (CNC), network storage function (NRF), network exposure function (NEF), local NEF (L-NEF), binding support function (BSF), application function ( Function, AF), etc. It should be noted that in the embodiments of the present application, only the core network device in the NR system is introduced as an example, and the specific type of the core network device is not limited.

[0063] In the NR system, when performing synchronization signal / physical broadcast channel signal block (or synchronization signal block) (Synchronization Signal and PBCH block, SSB) detection, the terminal first performs NR-Primary Synchronisation Signal (PSS) detection to obtain a part of the physical cell identity (ID), namely N(2)_ID; obtains orthogonal frequency division multiplex (OFDM) symbol timing and frequency synchronization; then detects the Secondary Synchronisation Signal (SSS) to obtain the other part of the physical cell ID, namely N(1)_ID, and finally obtains the complete physical cell ID, namely

[0064] The terminal then detects the physical broadcast channel (PBCH) and the demodulation reference signal (DMRS) for demodulating the PBCH, obtains the system frame number and SSB index, and further obtains the radio frame (subframe) timing.

[0065] In NR, the SSB period is configured in the System Information Block (SIB1), which can be 5, 10, 20, 40, 80, or 160 ms. During initial access, if the UE has not received SIB1, it will search for SSBs according to the default 20 ms period. SSBs do not appear once at a certain interval, but appear several times within a certain half-frame at a certain interval. This is designed for beam scanning. Each of these SSBs corresponds to a beam scanning direction, and eventually there will be an 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] The configuration parameters for the Physical Random Access Channel (PRACH) resources and SSB-RO are configured in SIB1. In NR, a cell can configure multiple frequency division multiplexed (FDM) PRACH transmission occasions (Physical Random Access Channel transmission opportunities, or PRACH Occasions, abbreviated as ROs) at a time location for PRACH transmission. The number of ROs that can be FDMed at a time can be: {1, 2, 4, 8}, which is configured and determined by the higher-layer parameter msg1-FDM.

[0067] The random access preamble can only be transmitted on the time domain resources configured by the parameter PRACHConfigurationIndex and the frequency domain resources configured by the parameter msg1-FDM. RA ∈{0,1,…,M-1}, where M is equal to the high-level parameter msg1-FDM. At the time of initial access, the PRACH frequency domain resource n RA The RO resource with the lowest frequency in the initial active uplink bandwidth part is numbered in ascending order. Otherwise, the PRACH frequency domain resource n RA The RO resources with the lowest frequency in the active uplink bandwidth part are numbered in ascending order. Figure 2 In the example, the number of ROs of FDM at a time is 8 (msg1-FDM=8), and the RO resources are numbered RO#0 to RO#7 in order from low to high frequency.

[0068] In NR, there is an association between RO and the SSB actually sent. RO is associated with SSB in the order of frequency domain (from low frequency to high frequency) and then time domain. One SSB may be associated with multiple consecutive ROs, or multiple SSBs may be associated with one RO (in this case, different SSBs correspond to different Preambles). It is configured by the network-side device through the parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB. For example, oneEighth means that one SSB is associated with 8 consecutive ROs, eight means that 8 SSBs are associated with one RO, and {n4,n8,n12,…} represents the number of Preambles associated with each SSB on an RO. For example, the value n4 means that the number of Preambles associated with each SSB on an RO is 4, and n8 means that the number of Preambles associated with each SSB on an RO is 8.

[0069] After all SSBs have completed one round of association with the RO, an SSB-RO mapping cycle is formed. An SSB-RO association period may include one or more SSB-RO mapping cycles. An SSB-RO association pattern period may include one or more SSB-RO association periods. The SSB-RO mapping is repeated based on the association pattern period, and the maximum association pattern period is 160ms.

[0070] Typically, a base station can use different beams to transmit different SSBs. The number of SSBs is configured using the ssb-PositionsInBurst parameter. For FR2, the maximum number of SSBs is 64. Based on the strength of the received downlink beam / SSB, the UE selects the RO / RO and preamble combination associated with a high-signal SSB to send Msg1. The network device then determines the UE's selected SSB based on the RO / RO and preamble combination of the received preamble. Msg2 is then sent on the downlink beam corresponding to the SSB to ensure downlink signal reception quality.

[0071] by Figure 2 For example, at a given moment in time, the number of FDM ROs is 8, and the number of SSBs actually transmitted is 4, namely SSB#0, SSB#1, SSB#2, and SSB#3. Each SSB is associated with two ROs. If the UE determines to send PRACH / Mg1 on the RO corresponding to SSB#0, the UE selects an RO between RO#0 and RO#1 to send the PRACH.

[0072] by Figure 3 For example, the number of ROs of FDM at a time is 2, and the number of SSBs actually transmitted is 8, namely SSB#0, SSB#1, ..., SSB#7, and every 2 SSBs are associated with 1 RO. When multiple SSBs share one RO, the Preamble sets associated with the multiple SSBs are different, that is, the same Preamble cannot belong to the Preamble sets associated with different SSBs at the same time: Figure 3 Taking RO#0 as an example, RO#0 has a total of 60 preambles, of which preambles with indexes 0 to 29 are associated with SSB#0, and preambles with indexes 30 to 59 are associated with SSB#1. Figure 3 Each square in the diagram indicates a RO, not an SSB. The marked SSB indicates which SSB(s) this RO is associated with.

[0073] Before sending PRACH, the UE first selects a received beam (SSB) with a reference signal received power (RSRP) higher than the threshold based on the RSRP of the received SSB. If the RSRP of multiple SSBs is higher than the threshold, the terminal can select any SSB with RSRP higher than the threshold. If there is no SSB with RSRP higher than the threshold, the UE selects an SSB based on the implementation.

[0074] Based on the NW (Network) configuration, the UE obtains the correspondence between the SSB and the RO. After selecting the 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 select one of the ROs for sending PRACH / Preamble / Msg1.

[0075] For example: Figure 2 In the example shown, assuming that the UE selects SSB#1, the UE can select one from RO#2 and RO#3 to send PRACH / Mg1; Figure 3 In the example shown, if the UE selects SSB#1, the UE can select the available RO closest to the current time among the ROs (RO#0 or 4) associated with SSB#1 to send PRACH / Mg1. In the selected RO, the UE selects a preamble from the preamble set associated with the selected SSB to send PRACH. Figure 3In the RO, two SSBs are associated with one RO. The preambles in the available preamble set associated with the SSBs in the RO are divided into two subsets, one for each SSB. The UE selects a preamble sequence from the preamble subset corresponding to the selected SSB for PRACH / Mg1 transmission.

[0076] Multi-carrier is a typical operation in 5G NR networks, used to enhance network-side device capacity. For the primary serving cell (Pcell) or primary secondary cell (PScell), the base station must send periodic SSBs, and the SSB period must be less than or equal to 20ms for the initial search terminal to successfully search.

[0077] For the intra-band secondary cell (Scell), the base station can send SSB, in which case the SSB-related parameters are configured when the Scell is added; or it can not send SSB, in which case the SSB-related parameters are not configured when the Scell is added, and the terminal obtains timing through the SSB on the Pcell.

[0078] For inter-band Scells, the base station must send SSBs and configure SSB-related parameters when adding the Scell.

[0079] Network energy efficiency is a key performance requirement. The majority of NR network power consumption comes from base stations, with 90% of this coming from the active antenna unit (AAU). Due to higher frequency bands, wider bandwidths, and more transceiver units (TRXs), the power consumption of a single NR base station is currently three to four times higher than that of LTE. Furthermore, in terms of operating expenses (OPEX), base station electricity costs 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 conservation in NR networks has become even more critical to achieving the significant success of 5G. Depending on actual load conditions, base stations can implement varying degrees of energy conservation measures, such as shutting down base stations, shutting down carriers / cells, shutting down channels, shutting down SSBs / beams, shutting down antennas / panels, implementing cell discontinuous transmission (cell DTX) and / or discontinuous reception (cell DRX), and implementing CSI adaptation.

[0080] Existing PRACH resources are configured through SIB1 and are updated at a low frequency. When the number of terminals in a cell is constantly changing, and the number of terminals initiating random access channels (RACH) is also constantly changing, maintaining a relatively fixed PRACH resource configuration requires the base station to constantly detect whether there are any terminals performing RACH access procedures on these resources, which is not conducive to energy conservation of the base station. For example, the number of terminals in a cell may suddenly decrease significantly. At this time, only a small number of terminals may initiate access on the configured RACH opportunities. However, the network side needs to detect every RACH opportunity, so a lot of energy is actually wasted. To further save network energy, it is possible to consider introducing a flexible PRACH resource indication mechanism.

[0081] The following, in conjunction with the accompanying drawings, describes in detail the PRACH resource determination and indication method, apparatus, terminal, and network-side equipment provided in the embodiments of the present application through some embodiments and their application scenarios.

[0082] See Figure 4 , Figure 4 This is a flowchart of a method for determining PRACH resources provided by an embodiment of the present application, which is executed by a terminal, such as Figure 4 As shown, the method includes the following steps:

[0083] Step 101: The terminal obtains first information;

[0084] Step 102: The terminal determines a PRACH resource according to the first information;

[0085] The first information indicates at least one of the following:

[0086] Configuration or reconfiguration information of PRACH resources;

[0087] PRACH resource update information, which can be activation, deactivation, validation or invalidation;

[0088] The time-frequency domain information of the PRACH resource includes the time-domain information or the frequency-domain information of the PRACH resource.

[0089] In this embodiment, the terminal can determine the PRACH resource through the first information. In this way, the first information can indicate the adaptive change information of the PRACH resource and determine the latest available PRACH resource. The network side adjusts the PRACH resources to adjust which resources the terminal initiates the random access process on, thereby changing the number and time of detection and adjusting the sleep time to save energy on the network side. For example, the network side can initially configure fewer RACH resources so that the terminals perform random access on these PRACH resources to save power and achieve network energy saving. When there are more RACH requests or a large number of terminals, more PRACH resources can be activated through the first information to reduce the probability of RACH collisions.

[0090] In some embodiments, the terminal obtaining the first information includes any one of the following:

[0091] The terminal receives first signaling from a network-side device, where the first signaling indicates the first information;

[0092] The terminal receives a first signaling from a network-side device, and acquires the first information at a first resource location indicated by the first signaling;

[0093] The terminal obtains the first information predefined by the protocol or preconfigured by the network side device.

[0094] In this embodiment, when the terminal is in a connected state, the network-side device can dynamically and flexibly indicate the first information. When the terminal is in a disconnected state, the first information predefined by the protocol or preconfigured by the network-side device can also be obtained. Part of the first information may be predefined by the protocol or preconfigured by the network, and part of the first information may be obtained through the first signaling or obtained from the first resource location indicated by the first signaling.

[0095] In this embodiment, the network-side device that sends the preconfiguration information, the network-side device that sends the first signaling, and the network-side device that sends the first information may be the same network-side device or may be different network-side devices. It should be noted that the network-side device may include a satellite-based network-side device, such as a satellite-based base station, or a ground-based network-side device, such as a ground-based base station.

[0096] In some embodiments, when there are multiple transmission beams, the terminal may assume that the first signaling is repeatedly transmitted on at least some of the beams.

[0097] In some embodiments, the PRACH resource includes at least one of the following:

[0098] Additional RO, which can also be called flexible RO, extra RO, dedicated RO or special RO, can be considered as RO configured with a new indication field in SIB message, or RO indicated by signaling such as DCI, MAC CE or RRC, or RO that can be identified starting from standard version R19 terminal;

[0099] Additional RO group, additional RO group can also be called flexible RO group, extra RO group, dedicated RO group or special RO group.

[0100] In some embodiments, the indication granularity of the first information is at least one of the following:

[0101] Cell or cell group, i.e. different cells correspond to different PRACH resources, or different cell groups correspond to different PRACH resources, or the first information is only applicable to indicating the associated cell or cell group;

[0102] Carrier or carrier group, that is, different carriers correspond to different PRACH resources, or different carrier groups correspond to different PRACH resources, or the first information is only applicable to indicating the associated carrier or carrier group;

[0103] Frequency or frequency group, i.e. different frequencies correspond to different PRACH resources, or different frequency groups correspond to different PRACH resources, or the first information is only applicable to indicating the associated frequency or frequency group;

[0104] Serving cell or serving cell group, that is, different serving cells correspond to different PRACH resources, or different serving cell groups correspond to different PRACH resources, or the first information is only applicable to indicating the associated serving cell or serving cell group;

[0105] Synchronization signal block SSB or SSB group, i.e. different SSBs correspond to different PRACH resources, or different SSB groups correspond to different PRACH resources, wherein different SSBs may correspond to non-uniform PRACH resources, or the first information is only applicable to indicating the associated SSB or SSB group;

[0106] SSB frequency or SSB frequency group, that is, different SSB frequencies correspond to different PRACH resources, or different SSB frequency groups correspond to different PRACH resources, or the first information is only applicable to indicating the associated SSB frequency or SSB frequency group.

[0107] In this embodiment, the first information can flexibly indicate the PRACH resources of different cells, cell groups, carriers, carrier groups, frequencies, frequency groups, service cells, service cell groups, SSBs, SSB groups, SSB frequencies, SSB frequency groups, etc.

[0108] In some embodiments, the first signaling is sent when a preset first condition is satisfied. Satisfaction of the preset first condition may be determined by a network-side device, that is, the network-side device sends the first signaling after determining that the first preset condition is satisfied. The first condition includes at least one of the following:

[0109] The network side device configures, reconfigures, or cancels the configuration of additional PRACH resources;

[0110] The number or location of additional PRACH resources is updated;

[0111] The number or location of additional PRACH resource groups is updated;

[0112] The network side device configures, reconfigures, or cancels the configuration of the resources, resource number, resource location, or mapping rules of the additional SSB;

[0113] The network side device configures, reconfigures, or cancels the configuration of the resources, resource number, resource location, or mapping rules of the additional SSB group.

[0114] When any one of the above-mentioned first conditions is met, the network-side device may send a first signaling to indicate the PRACH resource to the terminal through the first signaling.

[0115] In some embodiments, the first information includes at least one of the following:

[0116] Activation or deactivation: The purpose of the first information may be indicated implicitly or explicitly, such as by a 1-bit indication, where 1 indicates activation and 0 indicates inactivation. Alternatively, the indication may be implicit, such as assuming that the object indicated in the first information is activated, otherwise it is deactivated.

[0117] Activation or deactivation of PRACH resources can be indicated in an explicit or implicit manner, such as by using 1 bit to explicitly indicate whether to activate the additional RO. Or when activating or deactivating PRACH per (per) SSB, the activation or deactivation of the corresponding PRACH resources can be implicitly indicated in an implicit manner, such as by activating or deactivating the control resource set (CORESET) or search space (searchspace) corresponding to the first signaling, or its associated SSB;

[0118] Activate or deactivate at least some subsets of the PRACH resources. When there are K subsets, use K bits to indicate whether each of the K subsets is activated. For example, if there are 4 additional RO subsets or additional RO groups, use the first bit of the 4 bits to indicate whether the first subset is activated, use the second bit of the 4 bits to indicate whether the second subset is activated, use the third bit of the 4 bits to indicate whether the third subset is activated, and use the fourth bit of the 4 bits to indicate whether the fourth subset is activated.

[0119] Activating or deactivating the PRACH resources corresponding to at least some SSBs may indicate activation or deactivation of the PRACH resources in an explicit or implicit manner, such as by explicitly indicating whether to activate the PRACH resources using 1 bit, or when activating or deactivating the PRACH for each (per) SSB, by implicitly indicating activation or deactivation of the PRACH resources, such as by activating or deactivating the PRACH corresponding to the control resource set (CORESET) or the SSB associated with the search space (searchspace) corresponding to the first signaling;

[0120] Activate or deactivate at least some subsets of the PRACH resources corresponding to at least some SSBs. When there are K subsets, K bits are used to indicate whether each of the K subsets is activated. For example, if there are multiple SSBs, and each SSB corresponds to four additional RO resource subsets or additional RO groups, then each SSB corresponds to a four-bit indication. The first of the four bits indicates whether the first subset is activated, the second of the four bits indicates whether the second subset is activated, the third of the four bits indicates whether the third subset is activated, and the fourth of the four bits indicates whether the fourth subset is activated. In this case, PRACH resource adaptation can be performed for specific SSBs. For another example, if there are multiple SSBs corresponding to the same four additional RO groups, bits can be used to first indicate which SSBs are adapted, and then four bits can be used to indicate which additional RO groups are activated or deactivated.

[0121] Random access channel RACH identification or type information;

[0122] Second information for activating or deactivating a PRACH resource;

[0123] The validity time of the first signaling may include a start time or a time domain length, or a start time or a time domain interval, or a start time or a time domain window;

[0124] Activate or deactivate SSB;

[0125] Activate or deactivate paging;

[0126] Activate or deactivate SSB;

[0127] Activate or deactivate paging;

[0128] The number of additional PRACH resources or resource locations or mapping rules;

[0129] Additional PRACH resource group resource number or resource location or mapping rules;

[0130] Additional SSB resources or resource number or resource location or mapping rules;

[0131] Additional SSB group resources or resource number or resource location or mapping rules.

[0132] Activating or deactivating the PRACH resource means making the PRACH resource effective or ineffective, and may also be activating or deactivating the adaptation of the PRACH resource, that is, indicating whether the PRACH resource can be adapted according to the network side instruction.

[0133] PRACH adaptation, SSB adaptation, and Paging adaptation can be indicated together by the same signaling or independently.

[0134] Part of the content of the above-mentioned first information may be predefined by the protocol or preconfigured by the network side, rather than being carried in the first signaling.

[0135] It is understood that PRACH adaptation refers to the update, validation or invalidation of the resource number, resource location, or mapping rules of the PRACH resources, which is achieved through methods such as activation or deactivation, configuration or reconfiguration. For example, activating an additional RO or deactivating an additional RO group is PRACH resource adaptation. Similarly, SSB adaptation refers to the update of the resource number, transmission mode, or transmission period of SSB resources, and Paging adaptation refers to the update of the resource number, resource location, pattern, or period of Paging resources.

[0136] In a specific example, the first signaling can indicate whether the PRACH resource is adapted, and how the additional RO in the PRACH resource is configured is predefined by the protocol or preconfigured by the network side, such as being carried in SIB1 or other SIBs. In this case, the number of bits required is relatively small, such as 1 bit.

[0137] In another specific example, the first signaling indicates whether the PRACH resources of different groups or subsets are adapted, and how the additional ROs in the PRACH resources are configured or grouped is pre-configured by the network side, for example, carried in SIB1 or other SIBs. At this time, the number of bits required is still relatively small, for example, it can be 4 bits, and each bit corresponds to whether the PRACH resources of one group are activated.

[0138] In some embodiments, the grouping of additional RO groups may be based on the PRACH configuration index corresponding to different RO groups, that is, by configuring the pattern number of the corresponding PRACH configuration for each additional RO group, and then determining the additional RO resources contained in the additional RO group based on a predefined pattern list. It is also possible that the PRACH configuration index corresponding to different RO groups is the same, but different groups correspond to additional RO resources in different radio frame ranges, different subframe ranges, or different symbol ranges. In this case, the radio frame number, subframe index, or symbol index corresponding to the RO group may be predefined by the protocol or preconfigured by the network side. Another possibility is that the network side directly preconfigures the location of the additional RO resources contained in different additional RO groups or their index in all additional ROs or all RO resources.

[0139] In another specific example, the first signaling indicates whether the PRACH resources corresponding to different SSBs are adapted. When grouping is not considered, if there are 8 SSBs being sent in the system, an 8-bit indication is required. If these SSBs are grouped or only some SSBs are indicated, the bit overhead can be further reduced. If, on the basis of indicating different SSBs, it is further indicated whether the PRACH resources of different groups or subsets in each SSB are adapted, a larger number of bits is required, for example 8*4=32 bits, indicating whether the 4 different groups corresponding to the 8 SSBs are adapted.

[0140] In another specific embodiment, the first signaling indicates the specific resource number or resource location or mapping rule of the additional RO, which is equivalent to directly indicating the specific information of the activated or deactivated additional RO.

[0141] Furthermore, if the configuration information of the additional ROs in the PRACH resources is carried by the first signaling, the first signaling may indicate both the configuration information and the activation information, or additional ROs explicitly configured in the first signaling may be considered activated, while those not configured are considered inactivated. It is understood that the network side does not first indicate to the terminal where the additional ROs are configured through SIB signaling, but instead directly indicates to the terminal which additional ROs are available. In this case, the specific resource location or grouping of the additional ROs may already be predefined by the protocol, and therefore no additional configuration is required for the terminal. Alternatively, the first signaling may directly indicate the specific resource number, resource location, or mapping rules of the additional ROs, thus also eliminating the need for additional configuration for the terminal.

[0142] In this embodiment, the PRACH resource indicated by the first signaling may be associated with a specific SSB, or associated with all SSBs. When associated with a specific SSB, the search space or detection opportunity of the first signaling includes a set of first signalings, where the number of first signalings may be the number of SSBs actually sent in the system. In the first signaling set in the detection opportunity, the order of the first signaling is determined according to the order in which the SSBs are sent in the system. For example, the first first signaling in the first signaling set corresponds to SSB index 0 or its associated RRACH resource indication. When all SSBs are associated, it can be considered that the configuration or adaptation activation information of the PRACH resource corresponding to each SSB is the same. At this time, only one first signaling will be sent in the first signaling detection opportunity, or the first signaling will be sent repeatedly, and the number of repeated transmissions is related to the number of SSBs, or is pre-configured by the network side, or is determined by the network side.

[0143] In some embodiments, the first signaling includes not only the adaptation information of the PRACH resource, but also the adaptation information of at least one of the SSB and the Paging signal.

[0144] The first signaling may use one same indication field to simultaneously indicate adaptation information of one or two of PRACH, SSB, and Paging. A combination of one or two of PRACH, SSB, and Paging is predefined by the protocol or preconfigured by the network side.

[0145] Alternatively, the first signaling may use different indication fields to indicate the adaptation information of PRACH, SSB and Paging.

[0146] Alternatively, the first signaling may use one same indication field to indicate configuration information of different signals respectively. If there is activation or deactivation information, one indication may be used to indicate adaptation information at the same time.

[0147] Alternatively, the first signaling may use different indication fields to respectively indicate configuration information of different signals. If there is activation or deactivation information, different indications may respectively indicate adaptation information.

[0148] During the first signaling detection opportunity, different first signalings correspond to different SSBs, that is, a certain first signaling corresponds to the PRACH adaptation, SSB adaptation, or Paging adaptation corresponding to a specific SSB. Possibly, SSB adaptation is the different number of transmissions corresponding to a certain SSB index, and Paging adaptation is the adaptation of the additional PO corresponding to a certain SSB. Possibly, if the adaptation of only some signals varies with different SSBs, then during the first signaling detection opportunity, the adaptation indications for other signals in different first signalings corresponding to different SSBs are the same or repeated, or are only indicated in some of the first signalings.

[0149] In some embodiments, the RACH identifier or type information includes at least one of the following:

[0150] The identifier of the RACH configuration, for example, only the corresponding RACH is adapted, or the identifier carried in the first information implicitly corresponds to the activation or deactivation of the corresponding PRACH resource;

[0151] RACH configured group identifier;

[0152] RACH type or feature, such as adaptation for 4-step random access (4-stepRA), adaptation for only 2-step random access (2-stepRA), or adaptation for one or more of small data transfer (SDT), reduced capability (RedCap), coverage (Coverage), and network energy saving (NES) RACH.

[0153] In some embodiments, the second information includes at least one of the following:

[0154] The SSB index corresponding to the target PRACH resource, even if the uneven mapping with the SSB is not considered, the search space of the first signaling is not necessarily in the form of a signaling set, and may only include one physical downlink control channel (PDCCH). In this case, it cannot correspond one-to-one with the SSB, so the first signaling needs to indicate the corresponding SSB index;

[0155] The (time domain) resource information of the target PRACH resource, optionally, uses the PRACH configuration index to indicate the additional RO for activation or deactivation. Since different indexes correspond to different time domain patterns, when indicating a PRACH configuration index, optionally, the RO corresponding to the current pattern or the PRACH resources other than the corresponding RO are considered to be activated or deactivated; optionally, the intersection of the current pattern and the previously configured pattern or the PRACH resources corresponding to the previous pattern outside the intersection are considered to be activated or deactivated adaptation. Optionally, the time domain resource information includes the time domain position, that is, the PRACH resource is activated or deactivated after a certain time domain position. The time domain position is an offset value relative to a reference position, and the reference position can be the starting position of the radio frame, subframe or time slot where the PRACH resource is located;

[0156] Frequency domain resource information of the target PRACH resource, wherein the frequency domain resource information includes a frequency domain position, and the frequency domain position may be an offset value relative to a reference position.

[0157] In some embodiments, the time domain resource information includes at least one of the following:

[0158] Time domain starting position;

[0159] Temporal location;

[0160] Time domain length;

[0161] Time domain interval;

[0162] Time domain window.

[0163] In some embodiments, the frequency domain resource information includes at least one of the following:

[0164] Frequency domain starting position;

[0165] Frequency domain position;

[0166] Frequency domain length;

[0167] Frequency domain interval;

[0168] Frequency domain window.

[0169] In some embodiments, the type of the first signaling is at least one of the following:

[0170] System Information Block SIB;

[0171] Downlink control information DCI;

[0172] Media Access Control Element MAC CE;

[0173] Radio Resource Control RRC message.

[0174] In some embodiments, when the first signaling is a DCI or a MAC CE, the PRACH resource indicated by the first signaling is an RO, an RO group, a preamble, or a preamble group. This allows for faster updating of PRACH resources, shorter latency, and more timely response to changes in system load, thereby achieving network energy conservation.

[0175] In some embodiments, when the first signaling is DCI, the first signaling satisfies at least one of the following:

[0176] The first signaling is an existing DCI such as DCI 1-0 or DCI 2-7;

[0177] The first signaling is a predefined DCI, such as a new DCI format or an existing DCI, scrambled by a new preset radio network temporary identifier RNTI. The preset RNTI represents at least one of the following: PRACH resource adaptation, SSB adaptation, and Paging adaptation.

[0178] The first signaling is scrambled by a paging radio network temporary identifier P-RNTI or a preset radio network temporary identifier RNTI, where the preset RNTI represents at least one of the following: PRACH resource adaptation, SSB adaptation, and Paging adaptation.

[0179] In a specific example, the first information can be carried entirely in SIB1, and the PRACH update information can be indicated by updating SIB1. The first information can be carried in a newly added indication field of SIB1, the configuration information or reconfiguration information of the PRACH resources in the first information is carried in SIB1, and the DCI carries the activation or deactivation information of the group.

[0180] In another specific example, the first information can be carried in advance indication information related to Paging, such as carried in DCI 2-7, or in DCI associated with PO. This DCI is also sent before PO, that is, the detection timing may be the same as or different from DCI 2-7. This design facilitates the simultaneous carrying of Paging-related adaptation information in DCI.

[0181] In another specific example, the first information may be carried in DCI 1-0. In this case, DCI 1-0 is scrambled by the P-RNTI and satisfies at least one of the following conditions:

[0182] (1) The '00' in the short message indicator indicates that the PRACH resource has activated adaptation;

[0183] (2) The short message carries the (group) configuration, reconfiguration, activation or deactivation information of the PRACH resources.

[0184] A new indication field may be added to DCI 1-0 or an existing indication field may be redefined.

[0185] In another specific example, the first information may be carried in a newly defined DCI, which is scrambled by the P-RNTI, that is, a new DCI format is added to the paging DCI to indicate the first information.

[0186] In another specific example, the first information may be carried in a newly defined DCI, which is scrambled by a newly defined RNTI associated with indicating adaptation. This DCI is still detected on the PO or at a timing associated with the PO (e.g., a symbol or time slot that is offset before or after).

[0187] In another specific example, the first information may be carried in a newly defined DCI or an existing DCI, and the detection position of the DCI is indicated by a paging DCI (DCI 1-0).

[0188] In another specific example, the first information may be carried in a newly defined DCI or an existing MAC CE. The MAC CE is carried in a physical downlink shared channel (PDSCH), and the time-frequency domain position is indicated by a paging DCI (DCI 1-0).

[0189] In some embodiments, when the first signaling is an existing DCI such as DCI 1-0 or DCI 2-7, the first signaling satisfies at least one of the following:

[0190] The first information is indicated by a predefined indication field, such as a new indication field;

[0191] The first information is indicated by reserved bits, or indicated by a format reserved in an indication field;

[0192] The first information is indicated by re-interpreting the existing indication field;

[0193] Using a preset bit to indicate whether the first signaling includes the first information, for example, 1 bit may be used to indicate whether the first information is included and whether an existing indication field is interpreted;

[0194] A preset bit is used to indicate whether the existing indication field indicates the first information. For example, 1 bit may be used to indicate whether the first information is included and whether the existing indication field is interpreted.

[0195] In some embodiments, the first signaling detection opportunity satisfies at least one of the following:

[0196] Located in a Type-2 or Type-2a common search space or a dedicated search space for detecting the first signaling, where the dedicated search space may be associated with an SSB;

[0197] The time domain position of the first signaling detection opportunity meets the preset second condition;

[0198] The terminal monitors the first signaling detection opportunity M times every N time units, where N and M are positive integers, and the time unit includes any one of the following: a subframe, a time slot, a symbol, or a mini-time slot. The N time units may be A DRX cycles, B PRACH cycles, C PRACH slots, etc., and A, B, and C are integers greater than 0;

[0199] The first signaling detection opportunity includes K physical downlink control channel PDCCH detection opportunities, where K is a positive integer. Optionally, when K is greater than 1, K is the number of SSBs actually sent in one SSB period;

[0200] The first signaling detection opportunity consists of T time units for sending the first signaling, where T is a positive integer.

[0201] In some embodiments, the search space corresponding to the first signaling is the same as, or different from, the search space of Paging DCI, PEI, SIB1, or SIBX, or is independently configured.

[0202] In some embodiments, the second condition includes at least one of the following:

[0203] The same as or related to the detection timing of SIB1 or SIBX, or the same as or related to the position of the paging early indication (PEI) monitored by the terminal, or the same as or related to the paging opportunity PO position monitored by the terminal, because the terminal will wake up at the PO position and monitor the first signaling at the same time; the SIBX represents any possible SIB type other than SIB1, such as SIB2, SIB3, etc.

[0204] Determined by the reference time or the first time offset value. In some embodiments, the first time offset value may not be required and is determined only by the reference time, or the first time offset value may be 0.

[0205] In some embodiments, the reference time is at least one of the following:

[0206] The first starting position of the radio frame, subframe or time slot where the first signaling is associated with the RO;

[0207] a second starting position of the mapping period or mapping pattern period where the first signaling-associated RO is located;

[0208] a third starting position of the paging frame PF associated with the first signaling or the latest one or the one that meets the time interval requirement;

[0209] a fourth starting position of a radio frame, subframe, time slot, or symbol at a first moment before or after the first starting position, the second starting position, or the third starting position, wherein the interval between the first moment and the first starting position, the second starting position, or the third starting position is a second time offset value;

[0210] Detection timing of SIB1, SIBX, PEI, or Paging DCI.

[0211] It should be noted that the above starting position can also be described as an ending position.

[0212] In some embodiments, the first time offset value satisfies at least one of the following:

[0213] The first time offset value is determined by the reference moment and the starting symbol of the first detection opportunity in the first signaling detection opportunity, that is, the first time offset value is the time difference between the above two moments;

[0214] The time unit of the first time offset value is a subframe, a time slot, or a symbol;

[0215] The first time offset value is configured or pre-configured by a network-side device, for example, configured in SIB1 or configured in SIBX.

[0216] In some embodiments, the starting effective time of the first signaling is at least one of the following:

[0217] The sum of the sending time of the first signaling and a preset offset value (offset), where the offset may be indicated by the first signaling, or predefined by a protocol, or preconfigured by the network side;

[0218] The RO closest to the paging occasion PO or PF associated with the first signaling, assuming that the first signaling is carried in DCI 2-7 or the detection space is the same as DCI 2-7, so as to facilitate triggering the terminal to obtain updates through the Paging message, then the first signaling can be associated with a PO or PF;

[0219] The end position of the PF associated with the first signaling or the end position of the subframe where the PO associated with the first signaling is located;

[0220] Next RO mapping pattern period or mapping period;

[0221] Next radio frame;

[0222] The moment when the network side device is configured or preconfigured or predefined by the protocol. In some embodiments, the moment can be a system frame number (SFN), such as SFN#0 or a SFN configured or preconfigured by a network side device or predefined by the protocol, or a subframe or a symbol therein.

[0223] In some embodiments, the validity period of the first signaling is at least one of the following:

[0224] Preset timer duration;

[0225] P RO mapping pattern periods or mapping periods, where P is a positive integer;

[0226] Before the network side device updates the first information or updates the RO configuration next time, or until the network side updates the (legacy) RO configuration through SIB1.

[0227] The embodiment of the present application also provides a PRACH resource indication method, such as Figure 5 Shown, including:

[0228] Step 201: A network-side device indicates first information to a terminal, where the first information is used to determine a PRACH resource.

[0229] The first information indicates at least one of the following:

[0230] Configuration or reconfiguration information of PRACH resources;

[0231] PRACH resource update information, which can be activation, deactivation, validation or invalidation;

[0232] The time-frequency domain information of the PRACH resource includes the time-domain information or the frequency-domain information of the PRACH resource.

[0233] In this embodiment, the terminal can determine the PRACH resource through the first information. In this way, the first information can indicate the adaptive change information of the PRACH resource and determine the latest available PRACH resource. The network side dynamically adjusts the resources on which the terminal initiates the random access process by adjusting the PRACH resources, thereby changing the number and time of detection and adjusting the sleep time to save energy on the network side. For example, the network side can initially configure fewer RACH resources so that the terminals perform random access on these PRACH resources to save power and achieve network energy saving. When there are more RACH requests or a large number of terminals, more PRACH resources can be activated through the first information to reduce the probability of RACH collisions.

[0234] In some embodiments, the network-side device indicating the first information to the terminal includes:

[0235] The network side device sends a first signaling to the terminal, where the first signaling indicates first information, or the network side device can configure or pre-configure the first information, and the first signaling instructs the terminal to obtain the first information at a first resource location.

[0236] In this embodiment, when the terminal is in a connected state, the network-side device can dynamically and flexibly indicate the first information. When the terminal is in a disconnected state, the first information predefined by the protocol or preconfigured by the network-side device can also be obtained. Part of the first information may be predefined by the protocol or preconfigured by the network, and part of the first information may be obtained through the first signaling or obtained from the first resource location indicated by the first signaling.

[0237] In this embodiment, the network-side device that sends the preconfiguration information, the network-side device that sends the first signaling, and the network-side device that sends the first information may be the same network-side device or may be different network-side devices. It should be noted that the network-side device may include a satellite-based network-side device, such as a satellite-based base station, or a ground-based network-side device, such as a ground-based base station.

[0238] In some embodiments, the network-side device sending the first signaling to the terminal includes at least one of the following:

[0239] The network side device sends the first signaling at least once at a paging opportunity PO corresponding to at least part of the synchronization signal block SSB or an indication position associated with the PO;

[0240] The network side device periodically updates the system information block SIB, which indicates whether the PRACH resources are updated. This can help newly powered-on UEs or UEs reselecting to a cell to determine additional PRACH resources.

[0241] The network side device sends SIB1 to indicate whether to configure additional PRACH resources;

[0242] The network side device sends downlink control information DCI or media access control element MAC CE to indicate whether to activate the additional PRACH resource.

[0243] In some embodiments, the PRACH resource includes at least one of the following:

[0244] Additional RO, which can also be called flexible RO, extra RO, dedicated RO or special RO, can be considered as RO configured with a new indication field in SIB message, or RO indicated by signaling such as DCI, MAC CE or RRC, or RO that can be identified starting from standard version R19 terminal;

[0245] Additional RO group, additional RO group can also be called flexible RO group, extra RO group, dedicated RO group or special RO group.

[0246] In some embodiments, the indication granularity of the first information is at least one of the following:

[0247] Cell or cell group, i.e. different cells correspond to different PRACH resources, or different cell groups correspond to different PRACH resources, or the first information is only applicable to indicating the associated cell or cell group;

[0248] Carrier or carrier group, that is, different carriers correspond to different PRACH resources, or different carrier groups correspond to different PRACH resources, or the first information is only applicable to indicating the associated carrier or carrier group;

[0249] Frequency or frequency group, i.e. different frequencies correspond to different PRACH resources, or different frequency groups correspond to different PRACH resources, or the first information is only applicable to indicating the associated frequency or frequency group;

[0250] Serving cell or serving cell group, that is, different serving cells correspond to different PRACH resources, or different serving cell groups correspond to different PRACH resources, or the first information is only applicable to indicating the associated serving cell or serving cell group;

[0251] Synchronization signal block SSB or SSB group, i.e. different SSBs correspond to different PRACH resources, or different SSB groups correspond to different PRACH resources, wherein different SSBs may correspond to non-uniform PRACH resources, or the first information is only applicable to indicating the associated SSB or SSB group;

[0252] SSB frequency or SSB frequency group, that is, different SSB frequencies correspond to different PRACH resources, or different SSB frequency groups correspond to different PRACH resources, or the first information is only applicable to indicating the associated SSB frequency or SSB frequency group.

[0253] In this embodiment, the first information can flexibly indicate the PRACH resources of different cells, cell groups, carriers, carrier groups, frequencies, frequency groups, service cells, service cell groups, SSBs, SSB groups, SSB frequencies, SSB frequency groups, etc.

[0254] In some embodiments, the first signaling is sent when a preset first condition is met, and the first condition includes at least one of the following:

[0255] The network side device configures, reconfigures, or cancels the configuration of additional PRACH resources;

[0256] The number or location of additional PRACH resources is updated;

[0257] The number or location of additional PRACH resource groups is updated;

[0258] The network side device configures, reconfigures, or cancels the configuration of the resources, resource number, resource location, or mapping rules of the additional SSB;

[0259] The network side device configures, reconfigures, or cancels the configuration of the resources, resource number, resource location, or mapping rules of the additional SSB group.

[0260] In some embodiments, the first information includes at least one of the following:

[0261] Activation or deactivation: The purpose of the first information may be indicated implicitly or explicitly, such as by a 1-bit indication, where 1 indicates activation and 0 indicates inactivation. Alternatively, the indication may be implicit, such as assuming that the object indicated in the first information is activated, otherwise it is deactivated.

[0262] Activation or deactivation of PRACH resources can be indicated in an explicit or implicit manner, such as by using 1 bit to explicitly indicate whether to activate the additional RO. Or when activating or deactivating PRACH per (per) SSB, the activation or deactivation of the corresponding PRACH resources can be implicitly indicated in an implicit manner, such as by activating or deactivating the control resource set (CORESET) or search space (searchspace) corresponding to the first signaling, or its associated SSB;

[0263] Activate or deactivate at least some subsets of the PRACH resources. When there are K subsets, use K bits to indicate whether each of the K subsets is activated. For example, if there are 4 additional RO subsets or additional RO groups, use the first bit of the 4 bits to indicate whether the first subset is activated, use the second bit of the 4 bits to indicate whether the second subset is activated, use the third bit of the 4 bits to indicate whether the third subset is activated, and use the fourth bit of the 4 bits to indicate whether the fourth subset is activated.

[0264] Activating or deactivating the PRACH resources corresponding to at least some SSBs may indicate activation or deactivation of the PRACH resources in an explicit or implicit manner, such as by explicitly indicating whether to activate the PRACH resources using 1 bit, or when activating or deactivating the PRACH for each (per) SSB, by implicitly indicating activation or deactivation of the PRACH resources, such as by activating or deactivating the PRACH corresponding to the control resource set (CORESET) or the SSB associated with the search space (searchspace) corresponding to the first signaling;

[0265] Activate or deactivate at least some subsets of the PRACH resources corresponding to at least some SSBs. When there are K subsets, use K bits to indicate whether each of the K subsets is activated. For example, there are multiple SSBs, and each SSB corresponds to 4 additional RO resource subsets or additional RO groups. At this time, each SSB corresponds to 4 bits. The first bit of the 4 bits indicates whether the first subset is activated, the second bit of the 4 bits indicates whether the second subset is activated, the third bit of the 4 bits indicates whether the third subset is activated, and the fourth bit of the 4 bits indicates whether the fourth subset is activated. At this time, PRACH resource adaptation can be performed for specific SSBs. For another example, there are multiple SSBs corresponding to the same 4 additional RO groups. At this time, you can first use bits to indicate which SSBs to adapt, and then use 4 bits to indicate which additional RO groups are activated or deactivated.

[0266] Random access channel RACH identification or type information;

[0267] Second information for activating or deactivating a PRACH resource;

[0268] The validity time of the first signaling may include a start time or a time domain length, or a start time or a time domain interval, or a start time or a time domain window;

[0269] Activate or deactivate SSB;

[0270] Activate or deactivate paging;

[0271] Activate or deactivate SSB;

[0272] Activate or deactivate paging;

[0273] The number of additional PRACH resources or resource locations or mapping rules;

[0274] Additional PRACH resource group resource number or resource location or mapping rules;

[0275] Additional SSB resources or resource number or resource location or mapping rules;

[0276] Additional SSB group resources or resource number or resource location or mapping rules.

[0277] Activating or deactivating the PRACH resource means making the PRACH resource effective or ineffective, and may also be activating or deactivating the adaptation of the PRACH resource, that is, indicating whether the PRACH resource can be adapted according to the network side instruction.

[0278] PRACH adaptation, SSB adaptation, and Paging adaptation can be indicated together by the same signaling or independently.

[0279] Part of the content of the above-mentioned first information may be predefined by the protocol or preconfigured by the network side, rather than being carried in the first signaling.

[0280] It is understood that PRACH adaptation refers to the update of the resource number, resource location, or mapping rules of PRACH resources, achieved through methods such as activation or deactivation, configuration, or reconfiguration. For example, activating an additional RO or deactivating an additional RO group. Similarly, SSB adaptation refers to the update of the resource number, transmission mode, and transmission period of SSB resources, and Paging adaptation refers to the update of the resource number, transmission mode, and transmission period of Paging resources.

[0281] In some embodiments, the RACH identifier or type information includes at least one of the following:

[0282] The identifier of the RACH configuration, for example, only the corresponding RACH is adapted, or the identifier carried in the first information implicitly corresponds to the activation or deactivation of the corresponding PRACH resource;

[0283] RACH configured group identifier;

[0284] RACH type or feature, such as adaptation for 4-step random access (4-stepRA), adaptation for only 2-step random access (2-stepRA), or adaptation for one or more of small data transfer (SDT), reduced capability (RedCap), coverage, and NES RACH.

[0285] In some embodiments, the second information includes at least one of the following:

[0286] The SSB index corresponding to the target PRACH resource, even if the uneven mapping with the SSB is not considered, the search space of the first signaling is not necessarily in the form of a signaling set, and may only include one physical downlink control channel (PDCCH). In this case, it cannot correspond one-to-one with the SSB, so the first signaling needs to indicate the corresponding SSB index;

[0287] The time domain resource information of the target PRACH resource, optionally, uses the PRACH configuration index to indicate the additional RO for activation or deactivation. Since different indexes correspond to different time domain patterns, when indicating a PRACH configuration index, optionally, the RO corresponding to the current pattern or the PRACH resources other than the corresponding RO are considered to be activated or deactivated; optionally, the intersection of the current pattern and the previously configured pattern or the PRACH resources corresponding to the previous pattern outside the intersection are considered to be activated or deactivated adaptation. Optionally, the time domain resource information includes the time domain position, that is, the PRACH resource is activated or deactivated after a certain time domain position. The time domain position is an offset value relative to a reference position, and the reference position can be the starting position of the radio frame, subframe or time slot where the PRACH resource is located;

[0288] Frequency domain resource information of the target PRACH resource, wherein the frequency domain resource information includes a frequency domain position, and the frequency domain position may be an offset value relative to a reference position.

[0289] In some embodiments, the time domain resource information includes at least one of the following:

[0290] Time domain starting position;

[0291] Temporal location;

[0292] Time domain length;

[0293] Time domain interval;

[0294] Time domain window.

[0295] In some embodiments, the frequency domain resource information includes at least one of the following:

[0296] Frequency domain starting position;

[0297] Frequency domain position;

[0298] Frequency domain length;

[0299] Frequency domain interval;

[0300] Frequency domain window.

[0301] In some embodiments, the type of the first signaling is at least one of the following:

[0302] SIB;

[0303] DCI;

[0304] MAC CE;

[0305] Radio Resource Control RRC message.

[0306] In some embodiments, when the first signaling is DCI or MAC CE, the PRACH resource indicated by the first signaling is RO, RO group, preamble or preamble group.

[0307] In some embodiments, when the first signaling is DCI, the first signaling satisfies at least one of the following:

[0308] The first signaling is DCI 1-0 or DCI 2-7;

[0309] The first signaling is a predefined DCI, such as a new DCI format or an existing DCI, scrambled by a new preset radio network temporary identifier RNTI. The preset RNTI represents at least one of the following: PRACH resource adaptation, SSB adaptation, and Paging adaptation;

[0310] The first signaling is scrambled by a paging radio network temporary identifier P-RNTI or a preset radio network temporary identifier RNTI, where the preset RNTI represents at least one of the following: PRACH resource adaptation, SSB adaptation, and Paging adaptation.

[0311] In some embodiments, when the first signaling is DCI 1-0 or DCI 2-7, the first signaling satisfies at least one of the following:

[0312] The first information is indicated by a predefined indication field, such as a new indication field;

[0313] The first information is indicated by a reserved bit, or indicated by a format reserved in an indication field;

[0314] The first information is indicated by an existing indication field;

[0315] Using a preset bit to indicate whether the first signaling includes the first information, for example, 1 bit may be used to indicate whether the first information is included and whether an existing indication field is interpreted;

[0316] A preset bit is used to indicate whether the existing indication field indicates the first information. For example, 1 bit may be used to indicate whether the first information is included and whether the existing indication field is interpreted.

[0317] In some embodiments, the first signaling detection opportunity satisfies at least one of the following:

[0318] Located in a Type-2 or Type-2a common search space or a dedicated search space for detecting the first signaling, where the dedicated search space may be associated with an SSB;

[0319] The time domain position of the first signaling detection opportunity meets the preset second condition;

[0320] The terminal monitors the first signaling detection opportunity M times every N time units, where N and M are positive integers, and the time unit includes any one of the following: a subframe, a time slot, a symbol, or a mini-time slot. The N time units may be A DRX cycles, B PRACH cycles, C PRACH slots, etc., and A, B, and C are integers greater than 0;

[0321] The first signaling detection opportunity includes K physical downlink control channel PDCCH detection opportunities, where K is a positive integer. Optionally, when K is greater than 1, K is the number of SSBs actually sent in one SSB period;

[0322] The first signaling detection opportunity consists of T time units for sending the first signaling, where T is a positive integer.

[0323] In some embodiments, the second condition includes at least one of the following:

[0324] The detection timing is the same as or related to the detection timing of SIB1 or SIBX, or the position of the paging advance indication PEI monitored by the terminal, or the position of the paging opportunity PO monitored by the terminal, because the terminal will wake up at the PO position and monitor the first signaling at the same time; the SIBX represents any possible SIB type other than SIB1, such as SIB2, SIB3, etc.

[0325] Determined by the reference time or the first time offset value. In some embodiments, the first time offset value may not be required and is determined only by the reference time, or the first time offset value may be 0.

[0326] In some embodiments, the reference time is at least one of the following:

[0327] The first starting position of the radio frame, subframe or time slot where the first signaling is associated with the RO;

[0328] a second starting position of the mapping period or mapping pattern period where the first signaling-associated RO is located;

[0329] a third starting position of the paging frame PF associated with the first signaling or the latest one or the one that meets the time interval requirement;

[0330] a fourth starting position of a radio frame, subframe, time slot, or symbol at a first moment before or after the first starting position, the second starting position, or the third starting position, wherein the interval between the first moment and the first starting position, the second starting position, or the third starting position is a second time offset value;

[0331] Detection timing of SIB1, SIBX, PEI, or Paging DCI.

[0332] It should be noted that the above starting position can also be described as an ending position.

[0333] In some embodiments, the first time offset value satisfies at least one of the following:

[0334] The first time offset value is determined by the reference moment and the starting symbol of the first detection opportunity in the first signaling detection opportunity, that is, the first time offset value is the time difference between the above two moments;

[0335] The time unit of the first time offset value is a subframe, a time slot, or a symbol;

[0336] The first time offset value is configured or pre-configured by a network-side device, for example, configured in SIB1 or configured in SIBX.

[0337] In some embodiments, the starting effective time of the first signaling is at least one of the following:

[0338] The sum of the sending time of the first signaling and a preset offset value (offset), where the offset may be indicated by the first signaling, or predefined by a protocol, or preconfigured by the network side;

[0339] The RO closest to the paging occasion PO or PF associated with the first signaling, assuming that the first signaling is carried in DCI 2-7 or the detection space is the same as DCI 2-7, so as to facilitate triggering the terminal to obtain updates through the Paging message, then the first signaling can be associated with a PO or PF;

[0340] The end position of the PF associated with the first signaling or the end position of the subframe where the PO associated with the first signaling is located;

[0341] Next RO mapping pattern period or mapping period;

[0342] Next radio frame;

[0343] The moment when the network side device is configured or preconfigured or predefined by the protocol. In some embodiments, the moment can be a system frame number (SFN), such as SFN#0 or a SFN configured or preconfigured by a network side device or predefined by the protocol, or a subframe or a symbol therein.

[0344] In some embodiments, the validity period of the first signaling is at least one of the following:

[0345] Preset timer duration;

[0346] P RO mapping pattern periods or mapping periods, where P is a positive integer;

[0347] Before the network-side device updates the first information or updates the RO configuration next time.

[0348] In some embodiments, the network side device may notify the UE of the PRACH resource update through Paging-related signaling, including at least one of the following:

[0349] 1. Trigger the UE to receive SIB1 information, so that the UE obtains updated PRACH resource information through SIB1;

[0350] 2. Carry updated PRACH resource information through Paging-related advance indication information;

[0351] 3. Carry updated PRACH resource information through Paging-related DCI;

[0352] 4. Use Paging DCI to instruct the terminal to receive PRACH resource information at the corresponding PDSCH position;

[0353] In addition, the network side device can also directly update the SIB1 information so that the UE can obtain the PRACH update information.

[0354] The PRACH resource determination method provided in the embodiment of the present application may be executed by a PRACH resource determination device. In the embodiment of the present application, the PRACH resource determination device performing the PRACH resource determination method is taken as an example to illustrate the PRACH resource determination device provided in the embodiment of the present application.

[0355] See Figure 6 , Figure 6 Schematic diagram of a PRACH resource determination device provided in an embodiment of the present application, which is applied to terminal 3, such as Figure 6 As shown, the PRACH resource determination device includes:

[0356] An acquisition module 31 is configured to acquire first information;

[0357] A processing module 32 is configured to determine a PRACH resource according to the first information;

[0358] The first information indicates at least one of the following:

[0359] Configuration or reconfiguration information of PRACH resources;

[0360] Update information of PRACH resources;

[0361] Time-frequency domain information of PRACH resources.

[0362] In this embodiment, the terminal can determine the PRACH resource through the first information. In this way, the first information can indicate the adaptive change information of the PRACH resource and determine the latest available PRACH resource. The network side adjusts the PRACH resources to adjust which resources the terminal initiates the random access process on, thereby changing the number and time of detection and adjusting the sleep time to save energy on the network side. For example, the network side can initially configure fewer RACH resources so that the terminals perform random access on these PRACH resources to save power and achieve network energy saving. When there are more RACH requests or a large number of terminals, more PRACH resources can be activated through the first information to reduce the probability of RACH collisions.

[0363] In some embodiments, the acquiring module 31 acquires the first information including any one of the following:

[0364] The acquisition module 31 receives a first signaling from a network-side device, where the first signaling indicates the first information;

[0365] The acquisition module 31 receives a first signaling from a network-side device, and acquires the first information at a first resource location indicated by the first signaling;

[0366] The acquisition module 31 acquires the first information predefined by the protocol or preconfigured by the network side device.

[0367] In some embodiments, the PRACH resource includes at least one of the following:

[0368] Additional RO;

[0369] Additional RO group.

[0370] In some embodiments, the indication granularity of the first information is at least one of the following:

[0371] cell or cell group;

[0372] carrier or carrier group;

[0373] frequency or frequency group;

[0374] Serving cell or serving cell group;

[0375] Synchronization signal block SSB or SSB group;

[0376] SSB frequency or SSB frequency group.

[0377] In some embodiments, the first signaling is sent when a preset first condition is met, and the first condition includes at least one of the following:

[0378] The network side device configures, reconfigures, or cancels the configuration of additional PRACH resources;

[0379] The number or location of additional PRACH resources is updated;

[0380] The number or location of additional PRACH resource groups is updated;

[0381] The network side device configures, reconfigures, or cancels the configuration of the resources, resource number, resource location, or mapping rules of the additional SSB;

[0382] The network side device configures, reconfigures, or cancels the configuration of the resources, resource number, resource location, or mapping rules of the additional SSB group.

[0383] In some embodiments, the first information includes at least one of the following:

[0384] Activate or deactivate;

[0385] Activate or deactivate PRACH resources;

[0386] activating or deactivating at least a subset of PRACH resources;

[0387] Activate or deactivate PRACH resources corresponding to at least some SSBs;

[0388] activating or deactivating at least a subset of PRACH resources corresponding to at least some SSBs;

[0389] Random access channel RACH identification or type information;

[0390] Second information for activating or deactivating a target PRACH resource;

[0391] the effective time of the first signaling;

[0392] Activate or deactivate SSB;

[0393] Activate or deactivate paging;

[0394] The number of additional PRACH resources or resource locations or mapping rules;

[0395] Additional PRACH resource group resource number or resource location or mapping rules;

[0396] Additional SSB resources or resource number or resource location or mapping rules;

[0397] Additional SSB group resources or resource number or resource location or mapping rules.

[0398] In some embodiments, the RACH identifier or type information includes at least one of the following:

[0399] RACH configuration identifier;

[0400] RACH configured group identifier;

[0401] RACH type or feature.

[0402] In some embodiments, the second information includes at least one of the following:

[0403] The SSB index corresponding to the target PRACH resource;

[0404] Time domain resource information of the target PRACH resource;

[0405] Frequency domain resource information of the target PRACH resource.

[0406] In some embodiments, the time domain resource information includes at least one of the following:

[0407] Time domain starting position;

[0408] Temporal location;

[0409] Time domain length;

[0410] Time domain interval;

[0411] Time domain window.

[0412] In some embodiments, the frequency domain resource information includes at least one of the following:

[0413] Frequency domain starting position;

[0414] Frequency domain position;

[0415] Frequency domain length;

[0416] Frequency domain interval;

[0417] Frequency domain window.

[0418] In some embodiments, the type of the first signaling is at least one of the following:

[0419] System Information Block SIB;

[0420] Downlink control information DCI;

[0421] Media Access Control Element MAC CE;

[0422] Radio Resource Control RRC message.

[0423] In some embodiments, when the first signaling is DCI or MAC CE, the PRACH resource indicated by the first signaling is RO, RO group, preamble or preamble group.

[0424] In some embodiments, when the first signaling is DCI, the first signaling satisfies at least one of the following:

[0425] The first signaling is DCI 1-0 or DCI 2-7;

[0426] The first signaling is a predefined DCI;

[0427] The first signaling is scrambled by a paging radio network temporary identifier P-RNTI or a preset radio network temporary identifier RNTI, where the preset RNTI represents at least one of the following: PRACH resource adaptation, SSB adaptation, and Paging adaptation.

[0428] In some embodiments, when the first signaling is DCI 1-0 or DCI 2-7, the first signaling satisfies at least one of the following:

[0429] The first information is indicated by a predefined indication field;

[0430] The first information is indicated by a reserved bit, or indicated by a format reserved in an indication field;

[0431] The first information is indicated by an existing indication field;

[0432] using a preset bit to indicate whether the first signaling includes the first information;

[0433] A preset bit is used to indicate whether the existing indication field indicates the first information.

[0434] In some embodiments, the first signaling detection opportunity satisfies at least one of the following:

[0435] Located in a Type-2 or Type-2a common search space or a dedicated search space for detecting the first signaling;

[0436] The time domain position of the first signaling detection opportunity meets the preset second condition;

[0437] The terminal monitors the first signaling detection opportunity M times every N time units, where N and M are positive integers, and the time unit includes any one of the following: a subframe, a time slot, a symbol, and a mini-time slot;

[0438] The first signaling detection opportunity includes K physical downlink control channel PDCCH detection opportunities, where K is a positive integer;

[0439] The first signaling detection opportunity consists of T time units for sending the first signaling, where T is a positive integer.

[0440] In some embodiments, the second condition includes at least one of the following:

[0441] The same as or related to the detection timing of SIB1 or SIBX, or the same as or related to the position of the paging advance indication PEI monitored by the terminal, or the same as or related to the position of the paging opportunity PO monitored by the terminal;

[0442] Determined by the reference time or the first time offset value.

[0443] In some embodiments, the reference time is at least one of the following:

[0444] The first starting position of the radio frame, subframe or time slot where the first signaling is associated with the RO;

[0445] a second starting position of the mapping period or mapping pattern period where the first signaling-associated RO is located;

[0446] a third starting position of the paging frame PF associated with the first signaling or the latest one or the one that meets the time interval requirement;

[0447] a fourth starting position of a radio frame, subframe, time slot, or symbol at a first moment before or after the first starting position, the second starting position, or the third starting position, wherein the interval between the first moment and the first starting position, the second starting position, or the third starting position is a second time offset value;

[0448] Detection timing of SIB1, SIBX, PEI, or Paging DCI.

[0449] In some embodiments, the first time offset value satisfies at least one of the following:

[0450] The first time offset value is determined by a starting symbol of a first detection opportunity among the reference time and the first signaling detection opportunity;

[0451] The time unit of the first time offset value is a subframe, a time slot, or a symbol;

[0452] The first time offset value is configured or pre-configured by a network-side device.

[0453] In some embodiments, the starting effective time of the first signaling is at least one of the following:

[0454] The sum of the sending time of the first signaling and a preset offset value;

[0455] The RO closest to the paging occasion PO or PF associated with the first signaling;

[0456] The end position of the PF associated with the first signaling or the end position of the subframe where the PO associated with the first signaling is located;

[0457] Next RO mapping pattern period or mapping period;

[0458] Next radio frame;

[0459] The moment when the network-side device is configured or pre-configured or pre-defined by the protocol.

[0460] In some embodiments, the validity period of the first signaling is at least one of the following:

[0461] Preset timer duration;

[0462] P RO mapping pattern periods or mapping periods, where P is a positive integer;

[0463] Before the network-side device updates the first information or updates the RO configuration next time.

[0464] The PRACH resource indication method provided in the embodiment of the present application may be performed by a PRACH resource indication device. In the embodiment of the present application, the PRACH resource indication device performing the PRACH resource indication method is taken as an example to illustrate the PRACH resource indication device provided in the embodiment of the present application.

[0465] See Figure 7 , Figure 7 Schematic diagram of a PRACH resource indication device provided in an embodiment of the present application, which is applied to a network side device 4, such as Figure 7 As shown, the PRACH resource indication device includes:

[0466] A sending module 41, configured to indicate first information to a terminal, where the first information is used to determine a PRACH resource;

[0467] The first information indicates at least one of the following:

[0468] Configuration or reconfiguration information of PRACH resources;

[0469] Update information of PRACH resources;

[0470] Time-frequency domain information of PRACH resources.

[0471] In this embodiment, the terminal can determine the PRACH resource through the first information. In this way, the first information can indicate the adaptive change information of the PRACH resource and determine the latest available PRACH resource. The network side adjusts the PRACH resources to adjust which resources the terminal initiates the random access process on, thereby changing the number and time of detection and adjusting the sleep time to save energy on the network side. For example, the network side can initially configure fewer RACH resources so that the terminals perform random access on these PRACH resources to save power and achieve network energy saving. When there are more RACH requests or a large number of terminals, more PRACH resources can be activated through the first information to reduce the probability of RACH collisions.

[0472] In some embodiments, the sending module 41 indicates the first information to the terminal including:

[0473] The sending module 41 sends a first signaling to the terminal, where the first signaling indicates first information, or the first signaling instructs the terminal to obtain the first information at a first resource location.

[0474] In some embodiments, the sending module 41 sending the first signaling to the terminal includes at least one of the following:

[0475] The sending module 41 sends the first signaling at least once at a paging occasion PO corresponding to at least part of the synchronization signal block SSB or an indication position associated with the PO;

[0476] The sending module 41 periodically updates the system information block SIB, where the SIB indicates whether the PRACH resource is updated;

[0477] The sending module 41 sends SIB1 to indicate whether to configure additional PRACH resources;

[0478] The sending module 41 sends downlink control information DCI or media access control element MAC CE to indicate whether to activate the additional PRACH resource.

[0479] In some embodiments, the PRACH resource includes at least one of the following:

[0480] Additional RO;

[0481] Additional RO group.

[0482] In some embodiments, the indication granularity of the first information is at least one of the following:

[0483] cell or cell group;

[0484] carrier or carrier group;

[0485] frequency or frequency group;

[0486] Serving cell or serving cell group;

[0487] Synchronization signal block SSB or SSB group;

[0488] SSB frequency or SSB frequency group.

[0489] In some embodiments, the first signaling is sent when a preset first condition is satisfied, where the first condition includes at least one of the following:

[0490] The network side device configures, reconfigures, or cancels the configuration of additional PRACH resources;

[0491] The number or location of additional PRACH resources is updated;

[0492] The number or location of additional PRACH resource groups is updated;

[0493] The network side device configures, reconfigures, or cancels the configuration of the resources, resource number, resource location, or mapping rules of the additional SSB;

[0494] The network side device configures, reconfigures, or cancels the configuration of the resources, resource number, resource location, or mapping rules of the additional SSB group.

[0495] In some embodiments, the first information includes at least one of the following:

[0496] Activate or deactivate;

[0497] Activate or deactivate PRACH resources;

[0498] activating or deactivating at least a subset of PRACH resources;

[0499] Activate or deactivate PRACH resources corresponding to at least some SSBs;

[0500] activating or deactivating at least a subset of PRACH resources corresponding to at least some SSBs;

[0501] Random access channel RACH identification or type information;

[0502] Second information for activating or deactivating a target PRACH resource;

[0503] the effective time of the first signaling;

[0504] Activate or deactivate SSB;

[0505] Activate or deactivate paging;

[0506] The number of additional PRACH resources or resource locations or mapping rules;

[0507] Additional PRACH resource group resource number or resource location or mapping rules;

[0508] Additional SSB resources or resource number or resource location or mapping rules;

[0509] Additional SSB group resources or resource number or resource location or mapping rules.

[0510] In some embodiments, the RACH identifier or type information includes at least one of the following:

[0511] RACH configuration identifier;

[0512] RACH configured group identifier;

[0513] RACH type or feature.

[0514] In some embodiments, the second information includes at least one of the following:

[0515] The SSB index corresponding to the target PRACH resource;

[0516] Time domain resource information of the target PRACH resource;

[0517] Frequency domain resource information of the target PRACH resource.

[0518] In some embodiments, the time domain resource information includes at least one of the following:

[0519] Time domain starting position;

[0520] Temporal location;

[0521] Time domain length;

[0522] Time domain interval;

[0523] Time domain window.

[0524] In some embodiments, the frequency domain resource information includes at least one of the following:

[0525] Frequency domain starting position;

[0526] Frequency domain position;

[0527] Frequency domain length;

[0528] Frequency domain interval;

[0529] Frequency domain window.

[0530] In some embodiments, the type of the first signaling is at least one of the following:

[0531] SIB;

[0532] DCI;

[0533] MAC CE;

[0534] Radio Resource Control RRC message.

[0535] In some embodiments, when the first signaling is DCI or MAC CE, the PRACH resource indicated by the first signaling is RO, RO group, preamble or preamble group.

[0536] In some embodiments, when the first signaling is DCI, the first signaling satisfies at least one of the following:

[0537] The first signaling is DCI 1-0 or DCI 2-7;

[0538] The first signaling is a predefined DCI;

[0539] The first signaling is scrambled by a paging radio network temporary identifier P-RNTI or a preset radio network temporary identifier RNTI, where the preset RNTI represents at least one of the following: PRACH resource adaptation, SSB adaptation, and Paging adaptation.

[0540] In some embodiments, when the first signaling is DCI 1-0 or DCI 2-7, the first signaling satisfies at least one of the following:

[0541] The first information is indicated by a predefined indication field;

[0542] The first information is indicated by a reserved bit, or indicated by a format reserved in an indication field;

[0543] The first information is indicated by an existing indication field;

[0544] using a preset bit to indicate whether the first signaling includes the first information;

[0545] A preset bit is used to indicate whether the existing indication field indicates the first information.

[0546] In some embodiments, the first signaling detection opportunity satisfies at least one of the following:

[0547] Located in a Type-2 or Type-2a common search space or a dedicated search space for detecting the first signaling;

[0548] The time domain position of the first signaling detection opportunity meets the preset second condition;

[0549] The terminal monitors the first signaling detection opportunity M times every N time units, where N and M are positive integers, and the time unit includes any one of the following: a subframe, a time slot, a symbol, and a mini-time slot;

[0550] The first signaling detection opportunity includes K physical downlink control channel PDCCH detection opportunities, where K is a positive integer;

[0551] The first signaling detection opportunity consists of T time units for sending the first signaling, where T is a positive integer.

[0552] In some embodiments, the second condition includes at least one of the following:

[0553] The same as or related to the detection timing of SIB1 or SIBX, or the same as or related to the position of the paging advance indication PEI monitored by the terminal, or the same as or related to the position of the paging opportunity PO monitored by the terminal;

[0554] Determined by the reference time or the first time offset value.

[0555] In some embodiments, the reference time is at least one of the following:

[0556] The first starting position of the radio frame, subframe or time slot where the first signaling is associated with the RO;

[0557] a second starting position of the mapping period or mapping pattern period where the first signaling-associated RO is located;

[0558] a third starting position of the paging frame PF associated with the first signaling or the latest one or the one that meets the time interval requirement;

[0559] a fourth starting position of a radio frame, subframe, time slot, or symbol at a first moment before or after the first starting position, the second starting position, or the third starting position, wherein the interval between the first moment and the first starting position, the second starting position, or the third starting position is a second time offset value;

[0560] Detection timing of SIB1, SIBX, PEI, or Paging DCI.

[0561] In some embodiments, the first time offset value satisfies at least one of the following:

[0562] The first time offset value is determined by a starting symbol of a first detection opportunity among the reference time and the first signaling detection opportunity;

[0563] The time unit of the first time offset value is a subframe, a time slot, or a symbol;

[0564] The first time offset value is configured or pre-configured by a network-side device.

[0565] In some embodiments, the starting effective time of the first signaling is at least one of the following:

[0566] The sum of the sending time of the first signaling and a preset offset value;

[0567] The RO closest to the paging occasion PO or PF associated with the first signaling;

[0568] The end position of the PF associated with the first signaling or the end position of the subframe where the PO associated with the first signaling is located;

[0569] Next RO mapping pattern period or mapping period;

[0570] Next radio frame;

[0571] The moment when the network-side device is configured or pre-configured or pre-defined by the protocol.

[0572] In some embodiments, the validity period of the first signaling is at least one of the following:

[0573] Preset timer duration;

[0574] P RO mapping pattern periods or mapping periods, where P is a positive integer;

[0575] Before the network-side device updates the first information or updates the RO configuration next time.

[0576] The PRACH resource determination apparatus in the embodiments of the present application may be an electronic device, such as an electronic device with an operating system, or a component in the electronic device, such as an integrated circuit or chip. The electronic device may be a terminal or other device other than a terminal. For example, the terminal may include, but is not limited to, the types of terminal 11 listed above, and the other device may be a server, a network attached storage (NAS), etc., which is not specifically limited in the embodiments of the present application.

[0577] The PRACH resource determination device and PRACH resource indication device provided in the embodiments of the present application can implement the various processes implemented in the above method embodiments and achieve the same technical effects. To avoid repetition, they will not be described here.

[0578] like Figure 8As shown, an embodiment of the present application further provides a communication device 50, including a processor 51 and a memory 52, wherein the memory 52 stores a program or instruction that can be run on the processor 51. For example, when the communication device 50 is a terminal, the program or instruction is executed by the processor 51 to implement the various steps of the above-mentioned PRACH resource determination method embodiment and can achieve the same technical effect. When the communication device 50 is a network-side device, the program or instruction is executed by the processor 51 to implement the various steps of the above-mentioned PRACH resource indication method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0579] The present application also provides a terminal including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps in the method embodiment described above. This terminal embodiment corresponds to the above-described terminal-side method embodiment, and each implementation process and implementation method of the above-described method embodiment is applicable to this terminal embodiment and can achieve the same technical effects.

[0580] Specifically, Figure 9 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0581] The terminal 600 includes but is not limited to: a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609 and at least some of the components of the processor 610.

[0582] Those skilled in the art will understand that the terminal 600 may also include a power supply (such as a battery) to power each component. The power supply can be logically connected to the processor 610 through a power management system, thereby realizing functions such as managing charging, discharging, and power consumption management through the power management system. Figure 9 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be repeated here.

[0583] It should be understood that in an embodiment of the present application, the input unit 604 may include a graphics processing unit (GPU) 6041 and a microphone 6042, and the graphics processor 6041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 606 may include a display panel 6061, and the display panel 6061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 607 includes a touch panel 6071 and at least one of other input devices 6072. The touch panel 6071 is also called a touch screen. The touch panel 6071 may include two parts: a touch detection device and a touch controller. Other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0584] In the embodiment of the present application, after receiving downlink data from a network-side device, the radio frequency unit 601 may transmit the data to the processor 610 for processing. Furthermore, the radio frequency unit 601 may send uplink data to the network-side device. Typically, the radio frequency unit 601 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0585] The memory 609 can be used to store software programs or instructions and various data. The memory 609 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 609 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct memory bus random access memory (DRRAM). The memory 609 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0586] Processor 610 may include one or more processing units. Optionally, processor 610 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 610.

[0587] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the above-mentioned method embodiment and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0588] The present application also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown above. This network-side device embodiment corresponds to the above-described network-side device method embodiment, and each implementation process and implementation method of the above-described method embodiment can be applied to this network-side device embodiment and can achieve the same technical effects.

[0589] Specifically, the embodiment of the present application also provides a network side device. Figure 10 As shown, network-side device 70 includes an antenna 71, a radio frequency device 72, a baseband device 73, a processor 74, and a memory 75. Antenna 71 is connected to radio frequency device 72. In the uplink direction, radio frequency device 72 receives information via antenna 71 and sends the received information to baseband device 73 for processing. In the downlink direction, baseband device 73 processes the information to be transmitted and sends it to radio frequency device 72. Radio frequency device 72 processes the received information and then sends it through antenna 71.

[0590] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 73 , which includes a baseband processor.

[0591] The baseband device 73 may include, for example, at least one baseband board on which a plurality of chips are arranged, such as Figure 10 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 75 via a bus interface to call the program in the memory 75 to execute the network device operations shown in the above method embodiment.

[0592] The network side device may further include a network interface 76, which is, for example, a Common Public Radio Interface (CPRI).

[0593] Specifically, the network side device 70 of the embodiment of the present application also includes: instructions or programs stored in the memory 75 and can be run on the processor 74. The processor 74 calls the instructions or programs in the memory 75 to execute the methods executed by the above modules and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0594] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0595] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0596] An embodiment of the present application further provides a chip, which includes 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 the various processes of the above-mentioned method embodiment and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0597] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0598] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0599] An embodiment of the present application further provides a wireless communication system, including: a terminal and a network-side device, wherein the terminal can be used to execute the steps of the PRACH resource determination method described above, and the network-side device can be used to execute the steps of the PRACH resource indication method described above.

[0600] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0601] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0602] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A method for determining PRACH resources, characterized in that: include: The terminal obtains the first information; The terminal determines a PRACH resource according to the first information; The first information indicates at least one of the following: Configuration or reconfiguration information of PRACH resources; Update information of PRACH resources; Time-frequency domain information of PRACH resources.

2. The PRACH resource determination method according to claim 1, wherein: The terminal acquiring the first information includes any one of the following: The terminal receives first signaling from a network-side device, where the first signaling indicates the first information; The terminal receives a first signaling from a network-side device, and acquires the first information at a first resource location indicated by the first signaling; The terminal obtains the first information predefined by the protocol or preconfigured by the network side device.

3. The PRACH resource determination method according to claim 1, wherein: The PRACH resource includes at least one of the following: Additional RO; Additional RO group.

4. The PRACH resource determination method according to claim 1, wherein: The indication granularity of the first information is at least one of the following: cell or cell group; carrier or carrier group; frequency or frequency group; Serving cell or serving cell group; Synchronization signal block SSB or SSB group; SSB frequency or SSB frequency group.

5. The PRACH resource determination method according to claim 2, wherein: The first signaling is sent when a preset first condition is met, where the first condition includes at least one of the following: The network side device configures, reconfigures, or cancels the configuration of additional PRACH resources; The number or location of additional PRACH resources is updated; The number or location of additional PRACH resource groups is updated; The network side device configures, reconfigures, or cancels the configuration of the resources, resource number, resource location, or mapping rules of the additional SSB; The network side device configures, reconfigures, or cancels the configuration of the resources, resource number, resource location, or mapping rules of the additional SSB group.

6. The PRACH resource determination method according to claim 2, wherein: The first information includes at least one of the following: Activate or deactivate; Activate or deactivate PRACH resources; activating or deactivating at least a subset of PRACH resources; Activate or deactivate PRACH resources corresponding to at least some SSBs; activating or deactivating at least a subset of PRACH resources corresponding to at least some SSBs; Random access channel RACH identification or type information; Second information for activating or deactivating a target PRACH resource; the effective time of the first signaling; Activate or deactivate SSB; Activate or deactivate paging; The number of additional PRACH resources or resource locations or mapping rules; Additional PRACH resource group resource number or resource location or mapping rules; Additional SSB resources or resource number or resource location or mapping rules; Additional SSB group resources or resource number or resource location or mapping rules.

7. The PRACH resource determination method according to claim 6, wherein: The RACH identifier or type information includes at least one of the following: RACH configuration identifier; RACH configured group identifier; RACH type or feature.

8. The PRACH resource determination method according to claim 6, wherein: The second information includes at least one of the following: The SSB index corresponding to the target PRACH resource; Time domain resource information of the target PRACH resource; Frequency domain resource information of the target PRACH resource.

9. The PRACH resource determination method according to claim 2, wherein: The type of the first signaling is at least one of the following: System Information Block SIB; Downlink control information DCI; Media Access Control Element MAC CE; Radio Resource Control RRC message.

10. The PRACH resource determination method according to claim 9, wherein: When the first signaling is DCI or MAC CE, the PRACH resource indicated by the first signaling is RO, RO group, preamble or preamble group.

11. The PRACH resource determination method according to claim 9, wherein: When the first signaling is DCI, the first signaling satisfies at least one of the following: The first signaling is DCI 1-0 or DCI 2-7; The first signaling is a predefined DCI; The first signaling is scrambled by a paging radio network temporary identifier P-RNTI or a preset radio network temporary identifier RNTI, where the preset RNTI represents at least one of the following: PRACH resource adaptation, SSB adaptation, and Paging adaptation.

12. The PRACH resource determination method according to claim 11, wherein: When the first signaling is DCI 1-0 or DCI 2-7, the first signaling satisfies at least one of the following: The first information is indicated by a predefined indication field; The first information is indicated by a reserved bit, or indicated by a format reserved in an indication field; The first information is indicated by an existing indication field; using a preset bit to indicate whether the first signaling includes the first information; A preset bit is used to indicate whether the existing indication field indicates the first information.

13. The PRACH resource determination method according to claim 2, wherein: The first signaling detection opportunity meets at least one of the following conditions: Located in a Type-2 or Type-2a common search space or a dedicated search space for detecting the first signaling; The time domain position of the first signaling detection opportunity meets the preset second condition; The terminal monitors the first signaling detection opportunity M times every N time units, where N and M are positive integers, and the time unit includes any one of the following: a subframe, a time slot, a symbol, and a mini-time slot; The first signaling detection opportunity includes K physical downlink control channel PDCCH detection opportunities, where K is a positive integer; The first signaling detection opportunity consists of T time units for sending the first signaling, where T is a positive integer.

14. The PRACH resource determination method according to claim 13, wherein: The second condition includes at least one of the following: The same as or related to the detection timing of SIB1 or SIBX, or the same as or related to the position of the paging advance indication PEI monitored by the terminal, or the same as or related to the position of the paging opportunity PO monitored by the terminal; Determined by the reference time or the first time offset value.

15. The PRACH resource determination method according to claim 14, wherein: The reference time is at least one of the following: The first starting position of the radio frame, subframe or time slot where the first signaling is associated with the RO; a second starting position of the mapping period or mapping pattern period where the first signaling-associated RO is located; a third starting position of the paging frame PF associated with the first signaling or the latest one or the one that meets the time interval requirement; a fourth starting position of a radio frame, subframe, time slot, or symbol at a first moment before or after the first starting position, the second starting position, or the third starting position, wherein the interval between the first moment and the first starting position, the second starting position, or the third starting position is a second time offset value; Detection timing of SIB1, SIBX, PEI, or Paging DCI.

16. The PRACH resource determination method according to claim 14, wherein: The first time offset value satisfies at least one of the following: The first time offset value is determined by a starting symbol of a first detection opportunity among the reference time and the first signaling detection opportunity; The time unit of the first time offset value is a subframe, a time slot, or a symbol; The first time offset value is configured or pre-configured by a network-side device.

17. The PRACH resource determination method according to claim 2, wherein: The starting effective time of the first signaling is at least one of the following: The sum of the sending time of the first signaling and a preset offset value; The RO closest to the paging occasion PO or PF associated with the first signaling; The end position of the PF associated with the first signaling or the end position of the subframe where the PO associated with the first signaling is located; Next RO mapping pattern period or mapping period; Next radio frame; The moment when the network-side device is configured or pre-configured or pre-defined by the protocol.

18. The PRACH resource determination method according to claim 2, wherein: The validity period of the first signaling is at least one of the following: Preset timer duration; P RO mapping pattern periods or mapping periods, where P is a positive integer; Before the network-side device updates the first information or updates the RO configuration next time.

19. A PRACH resource indication method, characterized in that: include: The network side device indicates first information to the terminal, where the first information is used to determine a PRACH resource; The first information indicates at least one of the following: Configuration or reconfiguration information of PRACH resources; Update information of PRACH resources; Time-frequency domain information of PRACH resources.

20. The PRACH resource indication method according to claim 19, characterized in that: The network side device indicating the first information to the terminal includes: The network side device sends a first signaling to the terminal, where the first signaling indicates the first information, or, The first signaling instructs the terminal to obtain the first information at a first resource location.

21. The PRACH resource indication method according to claim 20, characterized in that: The network side device sending the first signaling to the terminal includes at least one of the following: The network side device sends the first signaling at least once at a paging opportunity PO corresponding to at least part of the synchronization signal block SSB or an indication position associated with the PO; The network side device periodically updates the system information block SIB, where the SIB indicates whether the PRACH resource is updated; The network side device sends SIB1 to indicate whether to configure additional PRACH resources; The network side device sends downlink control information DCI or media access control element MAC CE to indicate whether to activate the additional PRACH resource.

22. The PRACH resource indication method according to claim 19, characterized in that: The PRACH resource includes at least one of the following: Additional RO; Additional RO group.

23. The PRACH resource indication method according to claim 19, characterized in that: The indication granularity of the first information is at least one of the following: cell or cell group; carrier or carrier group; frequency or frequency group; Serving cell or serving cell group; Synchronization signal block SSB or SSB group; SSB frequency or SSB frequency group.

24. The PRACH resource indication method according to claim 20, characterized in that: The first signaling is sent when a preset first condition is met, where the first condition includes at least one of the following: The network side device configures, reconfigures, or cancels the configuration of additional PRACH resources; The number or location of additional PRACH resources is updated; The number or location of additional PRACH resource groups is updated; The network side device configures, reconfigures, or cancels the configuration of the resources, resource number, resource location, or mapping rules of the additional SSB; The network side device configures, reconfigures, or cancels the configuration of the resources, resource number, resource location, or mapping rules of the additional SSB group.

25. The PRACH resource indication method according to claim 20, characterized in that: The first information includes at least one of the following: Activate or deactivate; Activate or deactivate PRACH resources; activating or deactivating at least a subset of PRACH resources; Activate or deactivate PRACH resources corresponding to at least some SSBs; activating or deactivating at least a subset of PRACH resources corresponding to at least some SSBs; Random access channel RACH identification or type information; Second information for activating or deactivating a target PRACH resource; the effective time of the first signaling; Activate or deactivate SSB; Activate or deactivate paging; The number of additional PRACH resources or resource locations or mapping rules; Additional PRACH resource group resource number or resource location or mapping rules; Additional SSB resources or resource number or resource location or mapping rules; Additional SSB group resources or resource number or resource location or mapping rules.

26. The PRACH resource indication method according to claim 25, characterized in that: The RACH identifier or type information includes at least one of the following: RACH configuration identifier; RACH configured group identifier; RACH type or feature.

27. The PRACH resource indication method according to claim 25, characterized in that: The second information includes at least one of the following: The SSB index corresponding to the target PRACH resource; Time domain resource information of the target PRACH resource; Frequency domain resource information of the target PRACH resource.

28. The PRACH resource indication method according to claim 20, characterized in that: The type of the first signaling is at least one of the following: SIB; DCI; MAC CE; Radio Resource Control RRC message.

29. The PRACH resource indication method according to claim 28, characterized in that: When the first signaling is DCI or MAC CE, the PRACH resource indicated by the first signaling is RO, RO group, preamble or preamble group.

30. The PRACH resource indication method according to claim 28, wherein: When the first signaling is DCI, the first signaling satisfies at least one of the following: The first signaling is DCI 1-0 or DCI 2-7; The first signaling is a predefined DCI; The first signaling is scrambled by a paging radio network temporary identifier P-RNTI or a preset radio network temporary identifier RNTI, where the preset RNTI represents at least one of the following: PRACH resource adaptation, SSB adaptation, and Paging adaptation.

31. The PRACH resource indication method according to claim 30, characterized in that: When the first signaling is DCI 1-0 or DCI 2-7, the first signaling satisfies at least one of the following: The first information is indicated by a predefined indication field; The first information is indicated by a reserved bit, or indicated by a format reserved in an indication field; The first information is indicated by an existing indication field; using a preset bit to indicate whether the first signaling includes the first information; A preset bit is used to indicate whether the existing indication field indicates the first information.

32. The PRACH resource indication method according to claim 20, characterized in that: The first signaling detection opportunity meets at least one of the following conditions: Located in a Type-2 or Type-2a common search space or a dedicated search space for detecting the first signaling; The time domain position of the first signaling detection opportunity meets the preset second condition; The terminal monitors the first signaling detection opportunity M times every N time units, where N and M are positive integers, and the time unit includes any one of the following: a subframe, a time slot, a symbol, and a mini-time slot; The first signaling detection opportunity includes K physical downlink control channel PDCCH detection opportunities, where K is a positive integer; The first signaling detection opportunity consists of T time units for sending the first signaling, where T is a positive integer.

33. The PRACH resource indication method according to claim 32, characterized in that: The second condition includes at least one of the following: The same as or related to the detection timing of SIB1 or SIBX, or the same as or related to the position of the paging advance indication PEI monitored by the terminal, or the same as or related to the position of the paging opportunity PO monitored by the terminal; Determined by the reference time or the first time offset value.

34. The PRACH resource indication method according to claim 33, characterized in that: The reference time is at least one of the following: The first starting position of the radio frame, subframe or time slot where the first signaling is associated with the RO; a second starting position of the mapping period or mapping pattern period where the first signaling-associated RO is located; a third starting position of the paging frame PF associated with the first signaling or the latest one or the one that meets the time interval requirement; a fourth starting position of a radio frame, subframe, time slot, or symbol at a first moment before or after the first starting position, the second starting position, or the third starting position, wherein the interval between the first moment and the first starting position, the second starting position, or the third starting position is a second time offset value; Detection timing of SIB1, SIBX, PEI, or Paging DCI.

35. The PRACH resource indication method according to claim 33, characterized in that: The first time offset value satisfies at least one of the following: The first time offset value is determined by a starting symbol of a first detection opportunity among the reference time and the first signaling detection opportunity; The time unit of the first time offset value is a subframe, a time slot, or a symbol; The first time offset value is configured or pre-configured by a network-side device.

36. The PRACH resource indication method according to claim 20, characterized in that: The starting effective time of the first signaling is at least one of the following: The sum of the sending time of the first signaling and a preset offset value; The RO closest to the paging occasion PO or PF associated with the first signaling; The end position of the PF associated with the first signaling or the end position of the subframe where the PO associated with the first signaling is located; Next RO mapping pattern period or mapping period; Next radio frame; The moment when the network-side device is configured or pre-configured or pre-defined by the protocol.

37. The PRACH resource indication method according to claim 20, wherein: The validity period of the first signaling is at least one of the following: Preset timer duration; P RO mapping pattern periods or mapping periods, where P is a positive integer; Before the network-side device updates the first information or updates the RO configuration next time.

38. A PRACH resource determination device, characterized in that: include: An acquisition module, configured to acquire first information; a processing module, configured to determine a PRACH resource according to the first information; The first information indicates at least one of the following: Configuration or reconfiguration information of PRACH resources; Update information of PRACH resources; Time-frequency domain information of PRACH resources.

39. The PRACH resource determination device according to claim 38, characterized in that The PRACH resource includes at least one of the following: Additional RO; Additional RO group.

40. The PRACH resource determination device according to claim 38, wherein: The indication granularity of the first information is at least one of the following: cell or cell group; carrier or carrier group; frequency or frequency group; Serving cell or serving cell group; Synchronization signal block SSB or SSB group; SSB frequency or SSB frequency group.

41. The PRACH resource determination device according to claim 38, characterized in that The first information includes at least one of the following: Activate or deactivate; Activate or deactivate PRACH resources; activating or deactivating at least a subset of PRACH resources; Activate or deactivate PRACH resources corresponding to at least some SSBs; activating or deactivating at least a subset of PRACH resources corresponding to at least some SSBs; Random access channel RACH identification or type information; Second information for activating or deactivating a target PRACH resource; an effective time of the first signaling carrying the first information; Activate or deactivate SSB; Activate or deactivate paging; The number of additional PRACH resources or resource locations or mapping rules; Additional PRACH resource group resource number or resource location or mapping rules; Additional SSB resources or resource number or resource location or mapping rules; Additional SSB group resources or resource number or resource location or mapping rules.

42. A PRACH resource indication device, characterized in that: include: a sending module, configured to indicate first information to a terminal, where the first information is used to determine a PRACH resource; The first information indicates at least one of the following: Configuration or reconfiguration information of PRACH resources; Update information of PRACH resources; Time-frequency domain information of PRACH resources.

43. The PRACH resource indication device according to claim 42, characterized in that The first signaling carrying the first information is sent by the network side device after a preset first condition is met, where the first condition includes at least one of the following: The network side device configures, reconfigures, or cancels the configuration of additional PRACH resources; The number or location of additional PRACH resources is updated; The number or location of additional PRACH resource groups is updated; The network side device configures, reconfigures, or cancels the configuration of the resources, resource number, resource location, or mapping rules of the additional SSB; The network side device configures, reconfigures, or cancels the configuration of the resources, resource number, resource location, or mapping rules of the additional SSB group.

44. The PRACH resource indication device according to claim 42, characterized in that The PRACH resource includes at least one of the following: Additional RO; Additional RO group.

45. The PRACH resource indication device according to claim 42, characterized in that The indication granularity of the first information is at least one of the following: cell or cell group; carrier or carrier group; frequency or frequency group; Serving cell or serving cell group; Synchronization signal block SSB or SSB group; SSB frequency or SSB frequency group.

46. A terminal, characterized in that The method comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the PRACH resource determination method according to any one of claims 1 to 18 are implemented.

47. A network side device, characterized in that: It includes a processor and a memory, the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the PRACH resource indication method according to any one of claims 19 to 37 are implemented.

48. A readable storage medium, characterized in that The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, it implements the steps of the PRACH resource determination method according to any one of claims 1 to 18, or implements the steps of the PRACH resource indication method according to any one of claims 19 to 37.

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