Initial access method and apparatus, terminal, network side device, and storage medium

Abstract

The present application relates to the technical field of communications, and discloses an initial access method and apparatus, a terminal, a network side device, and a storage medium. The initial access method in an embodiment of the present application comprises: a terminal sends a wake-up signal to a network side device at at least one first frequency domain position, the wake-up signal being used for triggering the network side device to transmit a synchronization information block (SSB); and the terminal monitors the SSB from the network side device at at least one second frequency domain position.

Description

Initial access method, device, terminal, network side equipment and storage medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202311775727.2 filed in China on December 21, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to an initial access method, apparatus, terminal, network-side equipment, and storage medium. Background Art

[0004] Currently, most energy consumption comes from network-side devices. Network-side device power consumption can be divided into two parts: dynamic and static. The dynamic part is consumed only when data is being transmitted or received, while the static part is consumed constantly to maintain network-side device operation. For example, even when the network-side device is idle (not transmitting or receiving data), it still sends synchronization signal blocks (SSBs) to the terminal. Therefore, reducing the power consumption of network-side devices is an urgent issue. Summary of the Invention

[0005] Embodiments of the present application provide an initial access method, apparatus, terminal, network-side device, and storage medium, which can reduce the power consumption of network-side devices.

[0006] In a first aspect, an initial access method is provided, which is executed by a terminal, and the method includes: the terminal sends a wake-up signal to a network side device at at least one first frequency domain position, and the wake-up signal is used to trigger the network side device to transmit SSB; the terminal monitors the SSB from the network side device at at least one second frequency domain position.

[0007] In combination with the first aspect, in one possible implementation, the signal form of the above-mentioned reply signal includes at least one of the following: a signal based on a binary on-off keying (OOK) waveform, a signal based on an orthogonal frequency division multiplexing (OFDM) waveform, a signal based on a pulse waveform, and a signal based on a frequency shift keying (FSK) waveform.

[0008] In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the above reply signal includes at least one of the following: at least one common sequence, at least one information bearing block.

[0009] In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the information carried by the above reply signal is carried by any of the following methods:

[0010] carried by at least one common sequence;

[0011] Carried by at least one information carrying block;

[0012] A portion of the information carried by the reply signal is carried by at least one common sequence, and another portion of the information carried by the reply signal is carried by at least one information bearing block.

[0013] In combination with the first aspect and the above-mentioned possible implementation methods, in another possible implementation method, the relevant configuration of the above-mentioned reply signal is obtained through at least one of the following: protocol pre-definition, operator pre-configuration, network side device configuration or terminal reporting.

[0014] In combination with the first aspect and the above-mentioned possible implementation manner, in another possible implementation manner, the different sending manners of each sending process include: different sending processes of repeated sending send the wake-up signal through different beam directions.

[0015] In combination with the first aspect and the above-mentioned possible implementation methods, in another possible implementation method, the signal form of the wake-up signal includes at least one of the following: a signal based on an OOK waveform, a signal based on an OFDM waveform, a signal based on a pulse waveform, and a signal based on an FSK waveform.

[0016] In combination with the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the wake-up signal includes at least one of the following: at least one common sequence, and at least one information bearing block.

[0017] In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the information carried by the wake-up signal is carried by any of the following methods:

[0018] carried by at least one common sequence;

[0019] Carried by at least one information carrying block;

[0020] A portion of information carried by the wake-up signal is carried by at least one common sequence, and another portion of information carried by the wake-up signal is carried by at least one information bearing block.

[0021] In combination with the first aspect and the foregoing possible implementation manner, in another possible implementation manner, at least one candidate frequency domain position of the first frequency domain position and at least one candidate frequency domain position of the second frequency domain position are located in the same time division duplex (TDD) frequency band; or,

[0022] At least one candidate frequency domain position of the first frequency domain position is located in an uplink (UL) frequency band of a frequency division duplex (FDD) frequency band, and at least one candidate frequency domain position of the second frequency domain position is located in a downlink (DL) frequency band of the FDD frequency band.

[0023] In the second aspect, an initial access method is provided, which is executed by a network side device, and the method includes: the network side device monitors a wake-up signal from a terminal at at least one first frequency domain position, and the wake-up signal is used to trigger the network side device to transmit SSB; the network side device transmits SSB at at least one second frequency domain position.

[0024] In conjunction with the first aspect, in one possible implementation, the method for the network-side device to transmit an SSB at at least one second frequency domain location includes:

[0025] If the network side device does not transmit the SSB before detecting the wake-up signal, the network side device transmits the SSB in the first transmission mode at at least one second frequency domain position; or,

[0026] If the network side device transmits the SSB according to the first period before detecting the wake-up signal, the network side device transmits the SSB in the second transmission mode at at least one second frequency domain position;

[0027] In combination with the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the first transmission mode is any one of the following:

[0028] Transmit SSB according to the second cycle;

[0029] Transmit SSB at N moments, where N is a positive integer;

[0030] Transmit M cycles of SSB, where M is a positive integer;

[0031] The second transmission mode is: transmitting SSB according to the third cycle;

[0032] Among them, the first cycle is different from the third cycle.

[0033] In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, after the above-mentioned method of the network side device monitoring the wake-up signal from the terminal at at least one first frequency domain location, the method further includes:

[0034] If the network side device does not monitor a random access channel (Physical Random Access Channel, RACH) before detecting the wake-up signal, the network side device monitors the RACH in a first monitoring manner at at least one first frequency domain position; or,

[0035] If the network side device monitors the RACH according to the fourth period before detecting the wake-up signal, the network side device monitors the RACH according to the second monitoring mode at at least one first frequency domain position;

[0036] In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the above first monitoring method is any one of the following:

[0037] Monitor RACH according to the fifth cycle;

[0038] Monitor RACH at X times;

[0039] Monitor RACH for Y periods;

[0040] The second monitoring mode is: monitoring RACH according to the sixth cycle;

[0041] Among them, the fourth cycle is different from the sixth cycle.

[0042] In a third aspect, an initial access apparatus is provided, comprising: a sending module and a monitoring module. The sending module is configured to send a wake-up signal to a network-side device at at least one first frequency domain location, the wake-up signal triggering the network-side device to transmit an SSB. The monitoring module is configured to monitor the SSB from the network-side device at at least one second frequency domain location.

[0043] In a fourth aspect, an initial access device is provided, comprising: a monitoring module and a transmission module. The monitoring module is configured to monitor a wake-up signal from a terminal at at least one first frequency domain location, where the wake-up signal is used to trigger a network-side device to transmit an SSB. The transmission module is configured to transmit an SSB at at least one second frequency domain location.

[0044] 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.

[0045] In the sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is used to send a wake-up signal to a network side device at at least one first frequency domain position, and the wake-up signal is used to trigger the network side device to transmit SSB; the processor is used to monitor the SSB from the network side device at at least one second frequency domain position.

[0046] 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 first aspect are implemented.

[0047] In the eighth aspect, a network side device is provided, including a processor and a communication interface, wherein the processor is used to monitor a wake-up signal from a terminal at at least one first frequency domain position, and the wake-up signal is used to trigger the network side device to transmit SSB; and transmit SSB at at least one second frequency domain position.

[0048] 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.

[0049] 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.

[0050] 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 method as described in the first aspect, or to implement the method as described in the second aspect.

[0051] 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 initial access method as described in the first aspect, or to implement the steps of the initial access method as described in the second aspect.

[0052] In a thirteenth aspect, a terminal is provided, which is configured to implement the steps of the initial access method as described in the first aspect.

[0053] In a fourteenth aspect, a network side device is provided, which is configured to implement the steps of the initial access method as described in the second aspect.

[0054] In an embodiment of the present application, the terminal sends a wake-up signal to the network-side device at at least one first frequency domain location, and the wake-up signal is used to trigger the network-side device to transmit SSB; the terminal monitors the SSB from the network-side device at at least one second frequency domain location. In this solution, since the terminal can send a wake-up signal to the network-side device at at least one first frequency domain location to trigger the network-side device to transmit SSB, that is, the network-side device does not always transmit SSB to the terminal, and then after triggering the network-side device to transmit SSB, the terminal monitors the SSB from the network-side device at at least one second frequency domain location. In this way, the transmission of SSB by the network-side device is reduced, thereby reducing the power consumption of the network-side device. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] FIG1 is a schematic diagram of the architecture of a wireless communication system provided in an embodiment of the present application;

[0056] FIG2 is a flow chart of an initial access method according to an embodiment of the present application;

[0057] FIG3 is a second flow chart of an initial access method provided in an embodiment of the present application;

[0058] FIG4 is a third flow chart of an initial access method provided in an embodiment of the present application;

[0059] FIG5 is a fourth flow chart of an initial access method provided in an embodiment of the present application;

[0060] FIG6 is a fifth flow chart of an initial access method provided in an embodiment of the present application;

[0061] FIG7 is a schematic diagram of a structure of an initial access device according to an embodiment of the present application;

[0062] FIG8 is a second structural diagram of an initial access device provided in an embodiment of the present application;

[0063] FIG9 is a schematic diagram of the hardware structure of a communication device provided in an embodiment of the present application;

[0064] FIG10 is a schematic diagram of the hardware structure of a terminal provided in an embodiment of the present application;

[0065] FIG11 is a schematic diagram of the hardware structure of a network-side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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 described technology 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 example 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) communication systems.

[0070] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may 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-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or 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 (Wireless Local Area Network, WLAN) access point (Access Point, AS) or a wireless fidelity (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.

[0071] The following describes in detail the initial access method provided in the embodiments of the present application through some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0072] The following is an explanation of some concepts and / or terms involved in the initial access method provided in the embodiments of the present application.

[0073] 1. SSB:

[0074] It is one of the most important pilot channels used in the 5th Generation (5G). Its role is related to many aspects of terminal access to the cell, such as cell search, beam measurement, beam selection, and beam recovery.

[0075] 2. System Information Block (SIB):

[0076] System information elements are broadcast in SIBs. A system information block groups system information elements with the same properties. Different system information blocks can have different characteristics. System information is organized in a "tree" format.

[0077] 3. RACH:

[0078] In any case, if the terminal needs to establish communication with the network, it needs to send a message to the network through RACH to request a signaling channel from the system. The network will determine the type of channel to be allocated based on the channel request needs.

[0079] 4. Sub-carrier Space (SCS):

[0080] SCS is the center distance between two consecutive subcarriers, and the subcarrier spacing in the frequency domain is variable.

[0081] 5. Wake-up Signal (WUS): It is a power-saving mechanism introduced in the protocol.

[0082] The following describes in detail the initial access method provided in the embodiments of the present application through some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0083] Network energy conservation is crucial for environmental sustainability, reducing environmental impact, and saving operational costs. As 5G communication systems become ubiquitous across various industries and regions, handling more advanced services and applications requiring very high data rates, networks are becoming denser, utilizing more antennas, greater bandwidth, and more frequency bands. The environmental impact of 5G needs to be kept under control, and new solutions need to be developed to improve network energy conservation.

[0084] Energy consumption has become a critical component of operators' operating expenses (OPEX). According to a report by the Global System for Mobile communications Association (GSMA), mobile network energy costs account for approximately 23% of operators' total costs. Most energy consumption comes from network-side devices. Network-side device power consumption can be divided into two parts: dynamic and static. The dynamic part is consumed only when data is being transmitted or received, while the static part is consumed at all times to maintain network-side device operation. For example, network-side devices send SSB signals to terminals even when idle, meaning no data is being transmitted or received. Therefore, reducing network-side device power consumption is an urgent issue.

[0085] In an embodiment of the present application, the terminal can send a wake-up signal to the network side device at at least one first frequency domain position to trigger the network side device to transmit SSB, that is, the network side device does not always transmit SSB to the terminal. Then, after triggering the network side device to transmit SSB, the terminal monitors the SSB from the network side device at at least one second frequency domain position. In this way, the transmission of SSB of the network side device is reduced, thereby reducing the power consumption of the network side device.

[0086] The embodiment of the present application provides an initial access method, and Figure 2 shows a flow chart of the initial access method provided by the embodiment of the present application. As shown in Figure 2, the initial access method provided by the embodiment of the present application may include the following steps 201 and 202.

[0087] Step 201: The terminal sends a wake-up signal to a network-side device at at least one first frequency domain position.

[0088] In an embodiment of the present application, the above-mentioned wake-up signal is used to trigger the network side device to transmit SSB.

[0089] In some embodiments of the present application, the at least one first frequency domain position may be referred to as a frequency domain position group.

[0090] In some embodiments of the present application, the above-mentioned wake-up signal is also used to trigger the network-side device to perform at least one of the following: SIB transmission, RACH monitoring.

[0091] In some embodiments of the present application, the candidate frequency domain position of the at least one first frequency domain position is related to at least one of the following:

[0092] Operating frequency band, SCS of the wake-up signal, related configuration of the wake-up signal, Global Synchronization Channel Number (GSCN), Absolute Radio Frequency Channel Number (ARFCN), and frequency bands supported by the terminal.

[0093] It can be understood that the terminal can select at least one first frequency domain position from the candidate frequency domain positions to send a wake-up signal to the network side device at the at least one first frequency domain position.

[0094] In some embodiments of the present application, the terminal may select at least one first frequency domain position from the candidate frequency domain positions in a first manner, where the first manner includes any one of the following: random selection, full selection, and partial selection in sequence.

[0095] In some embodiments of the present application, the type of the operating frequency band may be any of the following:

[0096] TDD frequency band, FDD frequency band, licensed frequency band, and unlicensed frequency band.

[0097] In some embodiments of the present application, the above-mentioned operating frequency band includes a frequency band range.

[0098] In some embodiments of the present application, the above-mentioned configuration related to the wake-up signal is obtained through at least one of the following: protocol pre-definition, operator pre-configuration, network side device configuration or terminal reporting.

[0099] In some embodiments of the present application, the configuration related to the above-mentioned wake-up signal includes at least one of the following:

[0100] at least one candidate frequency domain position of the first frequency domain position;

[0101] candidate temporal locations of the wake-up signal;

[0102] The signal form of the wake-up signal;

[0103] The sequence form of the wake-up signal;

[0104] How to repeatedly send the wake-up signal;

[0105] The number of times the wake-up signal is sent repeatedly;

[0106] SSB transmission mode triggered by wake-up signal;

[0107] Transmission parameters corresponding to the SSB transmission mode triggered by the wake-up signal;

[0108] RACH monitoring method triggered by wake-up signal;

[0109] Monitoring parameters corresponding to the RACH monitoring mode triggered by the wake-up signal.

[0110] In some embodiments of the present application, the candidate time domain position of the wake-up signal includes at least one of the following:

[0111] Any time domain location, a specific time domain location with the Global Positioning System (GPS) time as a time reference, a specific time domain location with the time of another cell or other Radio Access Technology (RAT) as a time reference, or a specific time domain location with the time of the previous access to the cell as a time reference.

[0112] In some embodiments of the present application, the wake-up signal may include at least one of the following:

[0113] Signals based on OOK waveforms, signals based on OFDM waveforms, signals based on pulse waveforms, and signals based on FSK waveforms.

[0114] In some embodiments of the present application, the wake-up signal is generated based on an OOK waveform, including but not limited to OOK-1, OOK-2, OOK-4, etc.

[0115] In some embodiments of the present application, the wake-up signal is generated based on an OFDM waveform, including but not limited to OFDM, DFT-s-OFDM, MB-OFDM, F-OFDM, etc.

[0116] In some embodiments of the present application, the wake-up signal is generated based on a pulse waveform, including but not limited to pulse width modulation (PWM) modulation, pulse position modulation (PPM) modulation, pulse code modulation (PCM) modulation, etc.

[0117] In some embodiments of the present application, the wake-up signal is generated based on an FSK waveform, including but not limited to 2FSK, 4FSK, etc.

[0118] In some embodiments of the present application, the wake-up signal is repeatedly sent in any of the following ways:

[0119] The sending method is the same for each sending process;

[0120] The sending method is different for each sending process.

[0121] In some embodiments of the present application, the SSB transmission mode triggered by the wake-up signal may be any of the following:

[0122] The first transmission mode and the second transmission mode.

[0123] It should be noted that the detailed steps for the transmission parameters corresponding to the first transmission mode, the second transmission mode, and the SSB transmission mode triggered by the wake-up signal can be found in steps 402a and 402b in the following embodiments, which will not be repeated here.

[0124] In some embodiments of the present application, the RACH monitoring method triggered by the wake-up signal may be any of the following:

[0125] The first monitoring method and the second monitoring method.

[0126] It should be noted that the detailed steps for monitoring parameters corresponding to the first monitoring mode, the second monitoring mode, and the RACH monitoring mode triggered by the wake-up signal can be referred to steps 601 and 602 in the following embodiment, which will not be repeated here.

[0127] In some embodiments of the present application, the wake-up signal includes at least one of the following: at least one common sequence, at least one information bearing block.

[0128] Illustratively, the sequence type of the above-mentioned common sequence includes at least one of the following: pseudo-random (Pseudo-Noise Code, PN) sequence, Z sequence, Gold (pseudo-random) sequence, Barker (Barker code) sequence, and M sequence.

[0129] It can be understood that the at least one common sequence included in the above wake-up signal is a common sequence carrying the wake-up signal, and the at least one information bearing block included in the wake-up signal is an information bearing block carrying the wake-up signal.

[0130] In some embodiments of the present application, the wake-up signal includes at least one of the following:

[0131] Terminal verification related information of the terminal;

[0132] Information related to the terminal type of the terminal;

[0133] Wake-up signal number information;

[0134] Information related to the terminal's terminal-specific capabilities;

[0135] Information about the network-side device triggered by the wake-up signal;

[0136] Terminal operator information;

[0137] Information related to the type of wake-up signal trigger;

[0138] Whether it is an indication of allowing or stopping triggering;

[0139] The method or number of times the wake-up signal is repeated;

[0140] SSB transmission mode triggered by wake-up signal;

[0141] Transmission parameters corresponding to the SSB transmission mode triggered by the wake-up signal;

[0142] RACH monitoring method triggered by wake-up signal;

[0143] Monitoring parameters corresponding to the RACH monitoring mode triggered by the wake-up signal;

[0144] Frequency domain location information of SSB transmission triggered by the wake-up signal.

[0145] In some embodiments of the present application, the terminal verification related information of the terminal may be at least one of the following: an identification of the terminal, and a security verification code.

[0146] In some embodiments of the present application, the terminal type related information of the terminal may be at least one of the following: reduced capability (Redcap), non-terrestrial network communication (NTN).

[0147] In some embodiments of the present application, the above-mentioned wake-up signal number information may be the wake-up signal number when the wake-up signal is repeatedly sent.

[0148] In some embodiments of the present application, the terminal-specific capability-related information of the terminal may be whether the terminal supports a certain waveform.

[0149] In some embodiments of the present application, the network-side device-related information triggered by the above-mentioned wake-up signal may be: the triggered base station is a macro base station.

[0150] In some embodiments of the present application, the above-mentioned type-related information of the wake-up signal trigger may be any one of the following: SSB only or SSB&SIB.

[0151] In some embodiments of the present application, the information carried by the wake-up signal is carried in any of the following ways:

[0152] carried by at least one common sequence;

[0153] Carried by at least one information carrying block;

[0154] A portion of information carried by the wake-up signal is carried by at least one common sequence, and another portion of information carried by the wake-up signal is carried by at least one information bearing block.

[0155] For example, part of the information carried by the wake-up signal is carried by the first N bits, and another part of the information carried by the wake-up signal is carried by the last M bits.

[0156] In some embodiments of the present application, the above step 201 can be specifically implemented through the following step 201a.

[0157] Step 201a: The terminal sends a wake-up signal to the network side device at at least one first frequency domain position and at least one time domain position.

[0158] In an embodiment of the present application, the at least one time domain position is at least one of at least one candidate time domain position configured by the network side device.

[0159] In an embodiment of the present application, the candidate time domain position includes at least one of the following:

[0160] Any time domain location, a specific time domain location with GPS time as the time reference, a specific time domain location with the time of other cells or other RATs as the time reference, and a specific time domain location with the time of the last access to the cell as the time reference.

[0161] In an embodiment of the present application, a network-side device monitors a wake-up signal at at least one candidate time domain location.

[0162] In some embodiments of the present application, when at least one time domain position for sending the wake-up signal is any of the above time domain positions, the network-side device needs to continuously monitor the wake-up signal in the time domain.

[0163] In some embodiments of the present application, when at least one time domain location for sending a wake-up signal is the above-mentioned specific time domain location with GPS time as the time reference, illustratively, the wake-up signal can be sent at a specific time granularity with 0 o'clock as the starting point.

[0164] In this way, since the network side device can configure at least one candidate time domain position for the terminal, the terminal can send a wake-up signal to the network side device at at least one time domain position among the at least one candidate time domain position, and the network side device will also monitor the wake-up signal at at least one candidate time domain position without the need for continuous monitoring, thereby saving power consumption of the network side device.

[0165] In some embodiments of the present application, the above step 201 can be specifically implemented through the following step 201b.

[0166] Step 201b: The terminal repeatedly sends a wake-up signal to the network side device in the time domain or the frequency domain at at least one first frequency domain position.

[0167] In an embodiment of the present application, each of the above repeated sending processes satisfies any of the following conditions:

[0168] The sending method of each sending process is the same, and the content contained in the wake-up signal sent each time is the same;

[0169] The content of the wake-up signal sent each time is the same, but the sending method is different each time;

[0170] The specific content contained in each wake-up signal sent is different, but the sending method of each sending process is the same;

[0171] The specific content contained in each wake-up signal sent is different, and the sending method of each sending process is different.

[0172] In some embodiments of the present application, the different sending modes of each of the above-mentioned sending processes include: sending the wake-up signal in different beam directions in different repeated sending processes.

[0173] In some embodiments of the present application, the specific content may be a wake-up signal number when the wake-up signal is repeatedly sent.

[0174] For example, the wake-up signal is repeatedly sent L times in the time domain, the contents of the wake-up signals sent L times are the same, and the sending methods of the L sending processes are the same, for example, omnidirectional sending;

[0175] The wake-up signal is repeatedly sent L times in the time domain. The contents of the wake-up signals sent L times are the same, and the L transmission processes are sent in different beam directions.

[0176] The wake-up signal is repeatedly sent L times in the time domain. The wake-up signals sent L times contain different indexes, but other contents are the same. The sending method of the L sending processes is the same.

[0177] The wake-up signal is repeatedly sent L times in the time domain. The wake-up signals sent L times contain different indexes, but the other contents are the same. The L transmission processes are sent through different beam directions.

[0178] In this way, when the wake-up signal needs to be sent repeatedly, the terminal can send it in any of the above-mentioned ways, thereby improving the flexibility and diversity of the terminal in repeatedly sending the wake-up signal.

[0179] In some embodiments of the present application, the above step 201 can be specifically implemented through the following step 201c.

[0180] Step 201c: When the wake-up signal sending condition is met, the terminal sends a wake-up signal to the network side device at at least one first frequency domain position.

[0181] In an embodiment of the present application, the above-mentioned wake-up signal sending condition includes at least one of the following:

[0182] The terminal is ready for initial access;

[0183] Prepare for initial access on a frequency band capable of triggering a wake-up signal;

[0184] No SSB is detected during cell search on a frequency band supported by the terminal;

[0185] The cell search on the frequency band supported by the terminal and where the wake-up signal cannot be triggered does not detect SSB;

[0186] After the terminal searches for a cell for a period of time T, no SSB is detected;

[0187] The terminal experiences a wireless link failure;

[0188] The terminal recovers the wireless link.

[0189] It can be understood that since the protocol defines which frequency bands can trigger wake-up signals, the terminal can prepare for initial access on the frequency bands that can trigger wake-up signals to send a wake-up signal to the network side device at at least one first frequency domain position.

[0190] It can be understood that since the terminal supports some frequency bands, the terminal can search for cells on the frequency bands supported by the terminal, and when no SSB is detected, the terminal sends a wake-up signal to the network side device at at least one first frequency domain position.

[0191] It can be understood that the terminal can send a wake-up signal to the network side device at at least one first frequency domain position when a radio link failure occurs or when a radio link recovery is performed.

[0192] In this way, since the terminal sends the wake-up signal to the network side device at at least one first frequency domain position when the wake-up signal sending condition is met, the reliability of the terminal sending the wake-up signal is improved.

[0193] Step 202: The terminal monitors the SSB from the network side device at at least one second frequency domain location.

[0194] In some embodiments of the present application, the at least one second frequency domain position may be referred to as a frequency domain position group.

[0195] In some embodiments of the present application, the terminal may start monitoring the SSB from the network side device at at least one second frequency domain position after sending a wake-up signal to the network side device, or start monitoring the SSB from the network side device at at least one second frequency domain position at the first moment, or monitor the SSB from the network side device at at least one second frequency domain position when receiving a reply signal from the network side device.

[0196] In some embodiments of the present application, the above-mentioned step 202 can be specifically implemented by at least one of the following steps 202a and 202b.

[0197] Step 202a: At a first moment, the terminal monitors an SSB from a network-side device at at least one second frequency domain location.

[0198] In an embodiment of the present application, the first moment is located after a first time length after the moment when the terminal sends the wake-up signal.

[0199] In some embodiments of the present application, the first time length is at least one of the following:

[0200] After receiving the wake-up signal sent by the terminal, the network side device parses the wake-up signal for a certain duration;

[0201] The network-side device takes time to prepare from receiving the wake-up signal to sending the SSB.

[0202] It can be understood that after the terminal sends a wake-up signal to the network side device, the terminal can monitor the SSB from the network side device at at least one second frequency domain position after the first time length.

[0203] It can be understood that after the network side device receives the wake-up signal, it needs to parse the wake-up signal. During the parsing time of the wake-up signal, it will not send SSB to the terminal. Therefore, the terminal can monitor the SSB from the network side device at at least one second frequency domain position after sending the wake-up signal to the network side device and after the network side device parses the wake-up signal for a parsing time.

[0204] It can be understood that the network side device needs a certain preparation time from receiving the wake-up signal to sending the SSB. During this preparation time, the SSB will not be sent to the terminal. Therefore, the terminal can monitor the SSB from the network side device at at least one second frequency domain position after sending the wake-up signal to the network side device and after the above-mentioned preparation time.

[0205] In this way, compared with the case where the terminal immediately monitors the SSB from the network side device at at least one second frequency domain position after sending a wake-up signal to the network side device, the power consumption of the terminal is reduced.

[0206] Step 202b: The terminal caches data of the second time length at the start time of SSB monitoring to perform SSB monitoring.

[0207] In an embodiment of the present application, the above-mentioned second time length is the time length corresponding to the sending period of the SSB sent by the network side device.

[0208] In the embodiment of the present application, the first time length and the second time length are predefined by the protocol, configured by the network side device, or reported by the terminal.

[0209] It is understandable that the terminal can cache data of the second time length when starting to monitor SSB.

[0210] It can be understood that since the second time length is the time length corresponding to the sending period of the SSB sent by the network side device, when the terminal starts to monitor the SSB, it caches the data of the second time length to ensure that the SSB sent by the network side device can be monitored.

[0211] In some embodiments of the present application, the above step 202 can be specifically implemented through the following step 202c.

[0212] Step 202c: When the terminal receives a reply signal from the network-side device, the terminal monitors the SSB from the network-side device at at least one second frequency domain location.

[0213] In an embodiment of the present application, the reply information is used to indicate at least one of the following:

[0214] The network-side device receives a wake-up signal;

[0215] Check whether the network-side device wakes up successfully.

[0216] In some embodiments of the present application, the above-mentioned reply signal includes SSB related configuration.

[0217] In some embodiments of the present application, the above-mentioned SSB-related configuration includes at least one of the following:

[0218] Time domain resources used to send SSB, frequency domain resources used to send SSB, SSB sending period, SSB sending waveform, SSB SCS, SSB sending structure, number of SSB sent, and SSB encoding method.

[0219] It can be understood that after the terminal sends a wake-up signal to the network side device at at least one first frequency domain position, it waits for the downlink signal reply from the network side device, and then monitors the SSB from the network side device at at least one second frequency domain position after monitoring the reply signal.

[0220] In some embodiments of the present application, when the reply signal indicates that the network side device has received the wake-up signal or the network side device has been successfully awakened, the terminal monitors the SSB from the network side device at at least one second frequency domain location.

[0221] In some embodiments of the present application, when the reply signal indicates that the network side device has not been successfully awakened, the terminal does not monitor the SSB from the network side device.

[0222] In this way, compared with the case where the terminal immediately monitors the SSB from the network side device at at least one second frequency domain position after sending a wake-up signal to the network side device, the power consumption of the terminal is reduced.

[0223] In some embodiments of the present application, the signal form of the reply signal includes at least one of the following:

[0224] Signals based on OOK waveforms, signals based on OFDM waveforms, signals based on pulse waveforms, and signals based on FSK waveforms.

[0225] In some embodiments of the present application, the reply signal includes at least one of the following: at least one common sequence, at least one information bearing block.

[0226] Illustratively, the sequence type of the above-mentioned common sequence includes at least one of the following: PN sequence, Z sequence, Gold sequence, Barker sequence, and M sequence.

[0227] It can be understood that the at least one common sequence included in the reply signal is a common sequence carrying the reply signal, and the at least one information bearing block included in the reply signal is an information bearing block carrying the reply signal.

[0228] In some embodiments of the present application, the information carried by the reply signal is carried in any of the following ways:

[0229] carried by at least one common sequence;

[0230] Carried by at least one information carrying block;

[0231] A portion of the information carried by the reply signal is carried by at least one common sequence, and another portion of the information carried by the reply signal is carried by at least one information bearing block.

[0232] In some embodiments of the present application, the relevant configuration of the above-mentioned reply signal is obtained through at least one of the following: protocol pre-definition, operator pre-configuration, network side device configuration or terminal reporting.

[0233] An embodiment of the present application provides an initial access method. Since the terminal can send a wake-up signal to the network side device at at least one first frequency domain position to trigger the network side device to transmit SSB, that is, the network side device does not always transmit SSB to the terminal. Then, after triggering the network side device to transmit SSB, the terminal monitors the SSB from the network side device at at least one second frequency domain position. In this way, the transmission of SSB of the network side device is reduced, thereby reducing the power consumption of the network side device.

[0234] In some embodiments of the present application, the initial access method provided by the embodiments of the present application may further include the following step 301.

[0235] Step 301: When the terminal detects an SSB from a network-side device, the terminal performs a first operation.

[0236] In an embodiment of the present application, the first operation includes at least one of the following: initial cell search, cell synchronization, cell measurement, and link failure recovery.

[0237] In some embodiments of the present application, there is a mapping relationship between the candidate frequency domain position of the at least one second frequency domain position and the candidate frequency domain position of the at least one first frequency domain position, and the mapping relationship includes at least one of the following: one-to-one mapping, one-to-many mapping, many-to-one mapping, and many-to-many mapping.

[0238] It can be understood that when determining at least one first frequency domain position, at least one second frequency domain position having a mapping relationship with the at least one first frequency domain position can be determined based on the mapping relationship.

[0239] In some embodiments of the present application, the above mapping relationship includes any of the following:

[0240] When the number of candidate frequency domain positions of the at least one first frequency domain position is equal to the number of candidate frequency domain positions of the at least one second frequency domain position, there is a one-to-one mapping relationship between the candidate frequency domain positions of the at least one first frequency domain position and the candidate frequency domain positions of the at least one second frequency domain position;

[0241] When the number of candidate frequency domain positions of at least one first frequency domain position is greater than the number of candidate frequency domain positions of at least one second frequency domain position, a many-to-one mapping relationship exists between the candidate frequency domain positions of at least one first frequency domain position and the candidate frequency domain positions of at least one second frequency domain position;

[0242] When the number of candidate frequency domain positions of at least one first frequency domain position is less than the number of candidate frequency domain positions of at least one second frequency domain position, there is a one-to-many mapping relationship between the candidate frequency domain positions of at least one first frequency domain position and the candidate frequency domain positions of at least one second frequency domain position.

[0243] In some embodiments of the present application, the candidate frequency domain position of the at least one first frequency domain position and the candidate frequency domain position of the at least one second frequency domain position are located in the same time division duplex (TDD) frequency band; or,

[0244] At least one candidate frequency domain position of the first frequency domain position is located in the UL frequency band of the FDD frequency band, and at least one candidate frequency domain position of the second frequency domain position is located in the DL frequency band of the FDD frequency band.

[0245] In some embodiments of the present application, the candidate frequency domain position of the at least one first frequency domain position and the candidate frequency domain position of the at least one second frequency domain position are located in different frequency bands, ie, cross-frequency band mapping.

[0246] For example, a candidate frequency domain position of at least one first frequency domain position for sending a wake-up signal is a WUS raster; a candidate frequency domain position of at least one second frequency domain position for monitoring an SSB is a sync raster.

[0247] In an example, for a TDD frequency band, Z WUS rasters may be defined on a UL frequency band, and W sync rasters may be defined on a DL frequency band. The Z WUS rasters are mapped to the W sync rasters, where W and Z are positive integers.

[0248] When W = Z, one-to-one mapping is performed between Z WUS rasters and W sync rasters, for example, mapping in ascending order of frequency.

[0249] When W > Z, one-to-many mapping is performed between Z WUS rasters and W sync rasters;

[0250] When mapping according to the principle of sync raster priority, WUS raster #i (i = 0, 1,..., Z - 1) is mapped to sync raster #i, i + Z,..., i + j * Z, where i + j * Z < W and j is a non-negative integer;

[0251] For example: when Z = 3 and W = 6, WUS raster #0 can be mapped to sync raster #0 and sync raster #3 among the W sync rasters, that is, the first WUS raster is mapped to the first sync raster and the fourth sync raster among the W sync rasters; WUS raster #1 can be mapped to sync raster #1 and sync raster #4 among the W sync rasters, that is, the second WUS raster is mapped to the second sync raster and the fifth sync raster among the W sync rasters, and so on.

[0252] When mapping according to the principle of WUS raster priority, WUS raster # is mapped to the first W / Z sync rasters among the W sync rasters, and so on.

[0253] For example: when Z = 3 and W = 6, WUS raster #0 can be mapped to sync raster #0 and sync raster #1 among the W sync rasters, that is, the first WUS raster is mapped to the first sync raster and the second sync raster among the W sync rasters; WUS raster #1 can be mapped to sync raster #2 and sync raster #3 among the W sync rasters, that is, the second WUS raster is mapped to the third sync raster and the fourth sync raster among the W sync rasters, and so on.

[0254] When W < Z, many-to-one mapping is performed between Z WUS rasters and W sync rasters.

[0255] Exemplarily, each of the Z WUS rasters can be mapped to the W sync rasters.

[0256] In another example, for a TDD band, Z WUS rasters can be defined on this band and mapped to the W sync rasters on this band.

[0257] When W = Z, the Z WUS rasters and the W sync rasters are mapped one-to-one. For example, the WUS raster and the sync raster at the same frequency point correspond to each other.

[0258] When W > Z, the Z WUS rasters and the W sync rasters are mapped one-to-many;

[0259] When mapping according to the principle of sync raster priority, WUS raster#i (i = 0, 1,..., Z - 1) is mapped to sync raster#i, i + Z,..., i + j*Z, where i + j*Z < W and j is a non-negative integer;

[0260] When mapping according to the principle of WUS raster priority, WUS raster#0 is mapped to the first W / Z sync rasters among the W sync rasters, and so on.

[0261] When W < Z, the Z WUS rasters and the W sync rasters are mapped many-to-one.

[0262] Exemplarily, each of the Z WUS rasters can be mapped to the W sync rasters.

[0263] In yet another example, for cross-band mapping, Z WUS rasters can be defined on band A and W sync rasters can be defined on band B, and the Z WUS rasters are mapped to the W sync rasters.

[0264] Exemplarily, the association relationship between band A and band B can be defined by protocol display.

[0265] The embodiments of the present application provide an initial access method. FIG. 3 shows a flowchart of an initial access method provided by the embodiments of the present application. As shown in FIG. 3, the initial access method provided by the embodiments of the present application may include the following steps 401 and step 402.

[0266] Step 401: A network-side device monitors a wake-up signal from a terminal at at least one first frequency domain location.

[0267] In an embodiment of the present application, the above-mentioned wake-up signal is used to trigger the network side device to transmit SSB.

[0268] In some embodiments of the present application, the network-side device may monitor a wake-up signal from the terminal at at least one candidate frequency domain position of the first frequency domain position.

[0269] In some embodiments of the present application, the network side device can monitor the wake-up signal from the terminal at least one first frequency domain position of the frequency band mapping supporting SSB transmission.

[0270] In some embodiments of the present application, the above-mentioned wake-up signal is also used to trigger the network-side device to perform at least one of the following: SIB transmission, RACH monitoring.

[0271] Step 402: The network-side device transmits SSB at at least one second frequency domain location.

[0272] In some embodiments of the present application, after the network side device detects a wake-up signal from the terminal at at least one first frequency domain location, it can transmit SSB at at least one second frequency domain location.

[0273] It can be understood that after determining at least one first frequency domain position, at least one second frequency domain position corresponding to a candidate frequency domain position of the at least one first frequency domain position can be determined based on the mapping relationship.

[0274] In an embodiment of the present application, since the network side device transmits SSB at at least one second frequency domain position only after detecting a wake-up signal from the terminal at at least one first frequency domain position, and does not transmit SSB to the terminal all the time, the transmission of SSB by the network side device is reduced, thereby reducing the power consumption of the network side device.

[0275] In some embodiments of the present application, the above step 401 can be specifically implemented through the following step 401a.

[0276] Step 401a: The network-side device monitors a wake-up signal from the terminal at at least one first frequency domain position and at least one candidate time domain position.

[0277] In an embodiment of the present application, the candidate time domain position includes at least one of the following:

[0278] Any time domain location, a specific time domain location with GPS time as the time reference, a specific time domain location with the time of other cells or other radio access technologies (RATs) as the time reference, a specific time domain location with the time of the last access to the cell as the time reference,

[0279] It can be understood that when at least one time domain position at which the terminal sends the wake-up signal is any of the above time domain positions, the network-side device needs to continuously monitor the wake-up signal in the time domain.

[0280] In this way, since the network side device can configure at least one candidate time domain position for the terminal, the terminal can send a wake-up signal to the network side device at at least one time domain position among the at least one candidate time domain position, and the network side device will also monitor the wake-up signal at at least one candidate time domain position without the need for continuous monitoring, thereby saving power consumption of the network side device.

[0281] In some embodiments of the present application, the above step 402 can be specifically implemented through the following step 402a or step 402b.

[0282] Step 402a: If the network side device does not transmit the SSB before detecting the wake-up signal, the network side device transmits the SSB in the first transmission mode at at least one second frequency domain position.

[0283] In some embodiments of the present application, the first transmission mode is any one of the following:

[0284] Transmit SSB according to the second cycle;

[0285] Transmit SSB at N moments, where N is a positive integer;

[0286] Transmit M cycles of SSB, where M is a positive integer.

[0287] It can be understood that when the network side device does not transmit SSB before detecting the wake-up signal, the network side device transmits SSB in the above-mentioned first transmission mode at at least one second frequency domain position after detecting the wake-up signal.

[0288] Exemplarily, when the first transmission mode is to transmit SSB according to the second period, the transmission parameter is the time length corresponding to the second period.

[0289] Exemplarily, when the first transmission mode is to transmit SSB at N moments, the transmission parameter is N moments.

[0290] Exemplarily, when the first transmission mode is to transmit M cycles of SSB, the transmission parameter is M cycles.

[0291] Step 402b: If the network side device transmits SSB according to the first period before detecting the wake-up signal, the network side device transmits SSB in the second transmission mode at at least one second frequency domain position.

[0292] In some embodiments of the present application, the second transmission mode is: transmitting SSB according to the third period.

[0293] In some embodiments of the present application, the first period is different from the third period.

[0294] It can be understood that when the network side device transmits SSB according to the first period before detecting the wake-up signal, the network side device transmits SSB according to a third period different from the first period at at least one second frequency domain position after detecting the wake-up signal.

[0295] Exemplarily, when the second transmission mode is to transmit SSB according to the third period, the transmission parameter is the time length corresponding to the third period.

[0296] In some embodiments of the present application, in the case where the network side device transmits SSB before detecting the wake-up signal, the network side device may stop transmitting SSB after detecting the wake-up signal.

[0297] In this way, since the network side device can determine the SSB transmission mode after detecting the wake-up signal based on the SSB transmission mode before detecting the wake-up signal, the diversity of SSB transmission of the network side device is improved.

[0298] In some embodiments of the present application, if the network side device does not transmit the SIB before detecting the wake-up signal, the network side device transmits the SIB in the third transmission mode at at least one second frequency domain position.

[0299] In some embodiments of the present application, the third transmission mode is any one of the following:

[0300] Transmit SIB according to the seventh cycle;

[0301] Transmit the SIB at N moments, where N is a positive integer;

[0302] Transmit M cycles of SIB, where M is a positive integer.

[0303] It can be understood that, in the case where the network side device does not transmit the SIB before detecting the wake-up signal, the network side device transmits the SIB in the third transmission mode at at least one second frequency domain position after detecting the wake-up signal.

[0304] In some embodiments of the present application, if the network side device transmits the SIB according to the eighth period before detecting the wake-up signal, the network side device transmits the SIB in the fourth transmission mode at at least one second frequency domain position.

[0305] In some embodiments of the present application, the fourth transmission mode is: transmitting the SIB according to the ninth period.

[0306] In some embodiments of the present application, the eighth period is different from the ninth period.

[0307] It can be understood that when the network side device transmits SIB according to the eighth period before detecting the wake-up signal, the network side device transmits SIB according to the ninth period different from the eighth period at at least one second frequency domain position after detecting the wake-up signal.

[0308] In some embodiments of the present application, in the case where the network side device transmits the SIB before detecting the wake-up signal, the network side device may stop transmitting the SIB after detecting the wake-up signal.

[0309] In this way, since the network side device can determine the SIB transmission mode after detecting the wake-up signal based on the SIB transmission mode before detecting the wake-up signal, the diversity of SIB transmission by the network side device is improved.

[0310] In some embodiments of the present application, before the above step 402, the initial access method provided by the embodiment of the present application further includes the following step 501.

[0311] Step 501: The network side device sends a reply signal to the terminal.

[0312] In an embodiment of the present application, the reply signal is used to indicate at least one of the following:

[0313] The network-side device receives a wake-up signal;

[0314] Check whether the network-side device wakes up successfully.

[0315] In this way, since the network side device can send a reply signal to the terminal after detecting the wake-up signal, the terminal can determine whether to monitor SSB based on the reply signal. Compared with the terminal immediately monitoring the SSB from the network side device at at least one second frequency domain position after sending the wake-up signal to the network side device, the power consumption of the terminal is reduced.

[0316] In some embodiments of the present application, the above step 501 can be specifically implemented through the following step 501a.

[0317] Step 501a: The network-side device repeatedly sends a reply signal to the terminal in the time domain or frequency domain.

[0318] In an embodiment of the present application, each of the above repeated sending processes satisfies any of the following conditions:

[0319] The sending method of each sending process is the same, and the content contained in the reply signal sent each time is the same;

[0320] The content of the reply signal sent each time is the same, but the sending method is different each time;

[0321] The specific content contained in each reply signal sent is different, but the sending method of each sending process is the same;

[0322] The specific content contained in the reply signal sent each time is different, and the sending method of each sending process is different.

[0323] In some embodiments of the present application, the different sending modes of each sending process include: different sending processes of repeated sending send reply signals through different beam directions.

[0324] In some embodiments of the present application, the above-mentioned specific content may be a reply signal number when a reply signal is repeatedly sent.

[0325] For example, a reply signal is repeatedly sent P times in the time domain, and the contents of the reply signals sent P times are the same. The sending methods of the P sending processes are the same, for example, omnidirectional sending.

[0326] The reply signal is repeatedly sent P times in the time domain. The content of the reply signal sent P times is the same, and the P transmission processes are sent in different beam directions.

[0327] The reply signal is repeatedly sent P times in the time domain. The reply signals sent P times contain different indexes, but other contents are the same. The sending method of the P sending processes is the same.

[0328] The reply signal is repeatedly sent P times in the time domain. The reply signals sent P times contain different indexes, but the other contents are the same. The P transmission processes are sent through different beam directions.

[0329] In this way, since the reply signal needs to be sent repeatedly, the network side device can send it in any of the above-mentioned ways, thereby improving the flexibility and diversity of the network side device in repeatedly sending the reply signal.

[0330] In some embodiments of the present application, after the above step 401, the initial access method provided by the embodiment of the present application further includes the following step 601 or step 602.

[0331] Step 601: If the network side device does not monitor the RACH before detecting the wake-up signal, the network side device monitors the RACH in a first monitoring mode at at least one first frequency domain location.

[0332] In the embodiment of the present application, the first monitoring method is any one of the following:

[0333] Monitor RACH according to the fifth cycle;

[0334] Monitor RACH at X times;

[0335] Monitor RACH for Y periods.

[0336] It can be understood that, in the case that the network side device does not monitor the RACH before detecting the wake-up signal, the network side device monitors the RACH in the first monitoring manner at at least one first frequency domain position after detecting the wake-up signal.

[0337] Exemplarily, when the first monitoring mode is to monitor the RACH according to the fifth period, the detection parameter is the time length corresponding to the fifth period.

[0338] Exemplarily, when the first monitoring mode is to monitor the RACH at X moments, the detection parameter is X moments.

[0339] Exemplarily, when the first monitoring mode is to monitor RACH of Y periods, the detection parameter is Y periods.

[0340] Step 602: If the network side device monitors the RACH according to the fourth period before detecting the wake-up signal, the network side device monitors the RACH according to the second monitoring mode at at least one first frequency domain location.

[0341] In the embodiment of the present application, the second monitoring method is: monitoring RACH according to the sixth period;

[0342] In the embodiment of the present application, the fourth period is different from the sixth period.

[0343] It can be understood that when the network side device monitors RACH according to the fourth period before monitoring the wake-up signal, the network side device monitors RACH according to a sixth period different from the fourth period at at least one first frequency domain position after monitoring the wake-up signal.

[0344] Exemplarily, when the second monitoring mode is to monitor the RACH according to the sixth period, the detection parameter is the time length corresponding to the sixth period.

[0345] In some embodiments of the present application, in the case where the network side device monitors the RACH before detecting the wake-up signal, the network side device may stop monitoring the RACH after detecting the wake-up signal.

[0346] In this way, since the network side device can determine the RACH monitoring mode after detecting the wake-up signal based on the RACH monitoring mode before detecting the wake-up signal, the diversity of RACH monitoring by the network side device is improved.

[0347] The following three embodiments are used to illustrate the initial access method provided in the embodiments of the present application.

[0348] In the first possible embodiment:

[0349] In some embodiments of the present application, as shown in FIG4 , the initial access method provided in the embodiment of the present application may include the following steps A1 to A4.

[0350] A1. The terminal sends a wake-up signal to a network-side device at at least one first frequency domain position.

[0351] A2. The network-side device monitors a wake-up signal from the terminal at at least one first frequency domain location.

[0352] A3. After the network-side device detects a wake-up signal from the terminal at at least one first frequency domain position, it transmits an SSB at at least one second frequency domain position.

[0353] A4. The terminal monitors the SSB from the network side device at at least one second frequency domain location.

[0354] It should be noted that, for the relevant instructions in the above steps A1 to A4, reference can be made to the description in the above embodiment, which will not be repeated here.

[0355] It should be noted that the embodiment of the present application does not limit the execution order of step A4. Step A4 may be executed after step A1 is executed; or, step A4 may be executed after step A2 is executed; or, step A4 may be executed after step A3 is executed; or, step A3 and step A4 may be executed simultaneously, etc. The embodiment of the present application does not limit this. In other words, after the terminal sends a wake-up signal to the network-side device at at least one first frequency domain location, it can start monitoring the SSB from the network-side device at at least one second frequency domain location at any time.

[0356] In the second possible embodiment:

[0357] In some embodiments of the present application, as shown in FIG5 , the initial access method provided in the embodiment of the present application may include the following steps B1 to B4.

[0358] B1. The terminal sends a wake-up signal to a network-side device at at least one first frequency domain position and at least one time domain position.

[0359] B2. The network-side device monitors a wake-up signal from the terminal at at least one first frequency domain position and at least one candidate time domain position.

[0360] B3. After the network side device detects the wake-up signal from the terminal at at least one first frequency domain position and at least one candidate time domain position, it transmits SSB at at least one second frequency domain position.

[0361] B4. The terminal monitors the SSB from the network side device at at least one second frequency domain location.

[0362] It should be noted that, for the relevant instructions in the above steps B1 to B4, reference can be made to the description in the above embodiment, which will not be repeated here.

[0363] It should be noted that the embodiment of the present application does not limit the execution order of step B4. Step B4 may be executed after step B1 is executed; or, step B4 may be executed after step B2 is executed; or, step B4 may be executed after step B3 is executed; or, step B3 and step B4 may be executed simultaneously, etc. The embodiment of the present application does not limit this. In other words, after the terminal sends a wake-up signal to the network-side device at at least one first frequency domain location and at least one time domain location, it can start monitoring the SSB from the network-side device at at least one second frequency domain location at any time.

[0364] In a third possible embodiment:

[0365] In some embodiments of the present application, as shown in FIG6 , the initial access method provided in the embodiment of the present application may include the following steps C1 to C5.

[0366] C1. The terminal sends a wake-up signal to a network-side device at at least one first frequency domain position.

[0367] C2. The network-side device monitors a wake-up signal from the terminal at at least one first frequency domain location.

[0368] C3. After the network-side device detects a wake-up signal from the terminal at at least one first frequency domain position, the network-side device sends a reply signal to the terminal.

[0369] C4. The network-side device transmits SSB at at least one second frequency domain position.

[0370] C5. When the terminal receives a reply signal from the network-side device, the terminal monitors the SSB from the network-side device at at least one second frequency domain location.

[0371] It should be noted that, for the relevant explanations in the above steps C1 to C5, reference can be made to the description in the above embodiment, which will not be repeated here.

[0372] It should be noted that the embodiment of the present application does not limit the execution order of step C4 and step C5. Step C4 may be executed first and then step C5; or step C5 may be executed first and then step C4; or step C4 and step C5 may be executed simultaneously. In other words, as long as the terminal receives a reply signal from the network-side device, it can start monitoring the SSB from the network-side device at at least one second frequency domain location at any time.

[0373] The initial access method provided in the embodiment of the present application may be performed by an initial access device. In the embodiment of the present application, the initial access device provided in the embodiment of the present application is described by taking the initial access method performed by the initial access device as an example.

[0374] Figure 7 shows a possible structural diagram of an initial access device involved in an embodiment of the present application. As shown in Figure 7, the initial access device 50 may include: a sending module 51 and a monitoring module 52;

[0375] The sending module 51 is configured to send a wake-up signal to the network side device at at least one first frequency domain position, where the wake-up signal is used to trigger the network side device to transmit SSB;

[0376] The monitoring module 52 is configured to monitor the SSB from the network-side device at at least one second frequency domain location.

[0377] An embodiment of the present application provides an initial access device. Since the initial access device can send a wake-up signal to the network side device at at least one first frequency domain position to trigger the network side device to transmit SSB, that is, the network side device does not always transmit SSB to the terminal. Then, after triggering the network side device to transmit SSB, the terminal monitors the SSB from the network side device at at least one second frequency domain position. In this way, the transmission of SSB of the network side device is reduced, thereby reducing the power consumption of the network side device.

[0378] In a possible implementation, the wake-up signal is further used to trigger the network-side device to perform at least one of the following: system information block SIB transmission and random access channel RACH monitoring.

[0379] In one possible implementation, the initial access device provided in an embodiment of the present application also includes: an execution module: an execution module, which is used to perform a first operation when an SSB from a network side device is monitored. The first operation includes at least one of the following: initial cell search, cell synchronization, cell measurement, and link failure recovery.

[0380] In one possible implementation, the monitoring module 52 is specifically configured to monitor at least one of the following:

[0381] At a first moment, monitoring an SSB from a network-side device at at least one second frequency domain position, the first moment being a first time length after a sending moment of a wake-up signal sent by the terminal;

[0382] At the start of SSB monitoring, data of a second time length is cached to perform SSB monitoring, where the second time length is a time length corresponding to a sending period of the SSB sent by the network side device;

[0383] The first time length and the second time length are predefined by the protocol, configured by the network side device, or reported by the terminal.

[0384] In one possible implementation, the first time length is at least one of the following:

[0385] After receiving the wake-up signal sent by the terminal, the network side device parses the wake-up signal for a certain duration;

[0386] The network-side device takes time to prepare from receiving the wake-up signal to sending the SSB.

[0387] In one possible implementation, the sending module 51 is specifically configured to send a wake-up signal to the network-side device at at least one first frequency domain position and at least one time domain position; wherein the at least one time domain position is at least one of at least one candidate time domain position configured by the network-side device;

[0388] The candidate time domain location includes at least one of the following:

[0389] Any time domain location, a specific time domain location with the Global Positioning System (GPS) time as a time reference, a specific time domain location with the time of other cells or other radio access technologies (RATs) as a time reference, or a specific time domain location with the time of the last access to the cell as a time reference;

[0390] The network-side device monitors the wake-up signal at at least one candidate time domain location.

[0391] In one possible implementation, the candidate frequency domain position of at least one first frequency domain position is related to at least one of the following: the operating frequency band, the subcarrier spacing SCS of the wake-up signal, the relevant configuration of the wake-up signal, the global synchronization channel GSCN number, the absolute radio frequency channel ARFCN number, and the frequency band supported by the terminal.

[0392] In one possible implementation, the monitoring module 52 is specifically configured to monitor the SSB from the network side device at at least one second frequency domain position when the terminal receives a reply signal from the network side device;

[0393] The reply message indicates at least one of the following:

[0394] The network-side device receives a wake-up signal;

[0395] Check whether the network-side device wakes up successfully.

[0396] In one possible implementation, the reply signal includes SSB-related configuration, and the SSB-related configuration includes at least one of the following: time domain resources for sending SSB, frequency domain resources for sending SSB, SSB sending period, SSB sending waveform, SSB SCS, SSB sending structure, the number of SSBs sent, and SSB encoding method.

[0397] In one possible implementation, the sending module 51 is specifically configured to repeatedly send a wake-up signal to the network-side device in the time domain or the frequency domain at at least one first frequency domain position;

[0398] Each repeated sending process satisfies any of the following conditions:

[0399] The sending method of each sending process is the same, and the content contained in the wake-up signal sent each time is the same;

[0400] The content of the wake-up signal sent each time is the same, but the sending method is different each time;

[0401] The specific content contained in each wake-up signal sent is different, but the sending method of each sending process is the same;

[0402] The specific content contained in each wake-up signal sent is different, and the sending method of each sending process is different.

[0403] In one possible implementation, the wake-up signal includes at least one of the following:

[0404] Terminal verification related information of the terminal;

[0405] Information related to the terminal type of the terminal;

[0406] Wake-up signal number information;

[0407] Information related to the terminal's terminal-specific capabilities;

[0408] Information about the network-side device triggered by the wake-up signal;

[0409] Terminal operator information;

[0410] Information related to the type of wake-up signal trigger;

[0411] Whether it is an indication of allowing or stopping triggering;

[0412] The method or number of times the wake-up signal is repeated;

[0413] SSB transmission mode triggered by wake-up signal;

[0414] Transmission parameters corresponding to the SSB transmission mode triggered by the wake-up signal;

[0415] RACH monitoring method triggered by wake-up signal;

[0416] Monitoring parameters corresponding to the RACH monitoring mode triggered by the wake-up signal;

[0417] Frequency domain location information of SSB transmission triggered by the wake-up signal.

[0418] In one possible implementation, the sending module 51 is specifically configured to send a wake-up signal to the network side device at at least one first frequency domain position when the wake-up signal sending condition is met;

[0419] The wake-up signal sending condition includes at least one of the following:

[0420] The terminal is ready for initial access;

[0421] Prepare for initial access on a frequency band capable of triggering a wake-up signal;

[0422] No SSB is detected during cell search on a frequency band supported by the terminal;

[0423] The cell search on the frequency band supported by the terminal and where the wake-up signal cannot be triggered does not detect SSB;

[0424] After the terminal searches for a cell for a period of time T, no SSB is detected;

[0425] The terminal experiences a wireless link failure;

[0426] The terminal recovers the wireless link.

[0427] In one possible implementation, the configuration related to the wake-up signal is obtained through at least one of the following: protocol pre-definition, operator pre-configuration, network-side device configuration, or terminal reporting;

[0428] The wake-up signal configuration includes at least one of the following:

[0429] at least one candidate frequency domain position of the first frequency domain position;

[0430] candidate temporal locations of the wake-up signal;

[0431] The signal form of the wake-up signal;

[0432] The sequence form of the wake-up signal;

[0433] How to repeatedly send the wake-up signal;

[0434] The number of times the wake-up signal is sent repeatedly;

[0435] SSB transmission mode triggered by wake-up signal;

[0436] Transmission parameters corresponding to the SSB transmission mode triggered by the wake-up signal;

[0437] RACH monitoring method triggered by wake-up signal;

[0438] Monitoring parameters corresponding to the RACH monitoring mode triggered by the wake-up signal.

[0439] In one possible implementation, there is a mapping relationship between at least one candidate frequency domain position of the second frequency domain position and at least one candidate frequency domain position of the first frequency domain position, and the mapping relationship includes at least one of the following: one-to-one mapping, one-to-many mapping, many-to-one mapping, and many-to-many mapping.

[0440] In one possible implementation, the mapping relationship includes any of the following:

[0441] When the number of candidate frequency domain positions of the at least one first frequency domain position is equal to the number of candidate frequency domain positions of the at least one second frequency domain position, there is a one-to-one mapping relationship between the candidate frequency domain positions of the at least one first frequency domain position and the candidate frequency domain positions of the at least one second frequency domain position;

[0442] When the number of candidate frequency domain positions of at least one first frequency domain position is greater than the number of candidate frequency domain positions of at least one second frequency domain position, a many-to-one mapping relationship exists between the candidate frequency domain positions of at least one first frequency domain position and the candidate frequency domain positions of at least one second frequency domain position;

[0443] When the number of candidate frequency domain positions of at least one first frequency domain position is less than the number of candidate frequency domain positions of at least one second frequency domain position, there is a one-to-many mapping relationship between the candidate frequency domain positions of at least one first frequency domain position and the candidate frequency domain positions of at least one second frequency domain position.

[0444] FIG8 shows a possible structural diagram of an initial access device involved in an embodiment of the present application. As shown in FIG8 , the initial access device 60 may include: a monitoring module 61 and a transmission module 62;

[0445] The monitoring module 61 is configured to monitor a wake-up signal from the terminal at at least one first frequency domain location, where the wake-up signal is used to trigger the network-side device to transmit SSB;

[0446] The transmission module 62 is configured to transmit the SSB at at least one second frequency domain position.

[0447] An embodiment of the present application provides an initial access device. Since the network side device transmits SSB at at least one second frequency domain position only after detecting a wake-up signal from the terminal at at least one first frequency domain position, and does not transmit SSB to the terminal all the time, the transmission of SSB by the network side device is reduced, thereby reducing the power consumption of the network side device.

[0448] In a possible implementation, the wake-up signal is further used to trigger the network-side device to perform at least one of the following: SIB transmission and RACH monitoring.

[0449] In one possible implementation, the initial access device provided in the embodiment of the present application further includes: a sending module;

[0450] A sending module, configured to send a reply signal to the terminal before the transmission module 62 transmits the SSB at at least one second frequency domain position, where the reply signal is used to indicate at least one of the following:

[0451] The network-side device receives a wake-up signal;

[0452] Check whether the network-side device wakes up successfully.

[0453] In one possible implementation, the sending module is specifically configured to repeatedly send a reply signal to the terminal in the time domain or the frequency domain;

[0454] Each repeated sending process satisfies any of the following conditions:

[0455] The sending method of each sending process is the same, and the content contained in the reply signal sent each time is the same;

[0456] The content of the reply signal sent each time is the same, but the sending method is different each time;

[0457] The specific content contained in each reply signal sent is different, but the sending method of each sending process is the same;

[0458] The specific content contained in the reply signal sent each time is different, and the sending method of each sending process is different.

[0459] In one possible implementation, the monitoring module 61 is specifically configured to monitor a network-side device for a wake-up signal from a terminal at at least one first frequency domain position and at least one candidate time domain position;

[0460] Among them, the candidate time domain positions include at least one of the following: any time domain position, a specific time domain position with GPS time as the time reference, a specific time domain position with the time of other cells or other wireless access technologies RAT as the time reference, and a specific time domain position with the time of the previous access to the cell as the time reference.

[0461] The initial access device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The device can be a mobile electronic device or a non-mobile electronic device. For example, the mobile electronic device can be a mobile phone, a tablet computer, a laptop computer, a PDA, an in-vehicle electronic device, a wearable device, a UMPC, a netbook, or a PDA, etc. The non-mobile electronic device can be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine, or a self-service machine, etc., and the embodiments of the present application do not specifically limit this.

[0462] The initial access device provided in the embodiment of the present application can implement each process implemented in the above method embodiment and achieve the same technical effect. To avoid repetition, it will not be described here.

[0463] Optionally, as shown in Figure 9, an embodiment of the present application further provides a communication device 700, including a processor 701 and a memory 702, wherein the memory 702 stores a program or instruction that can be run on the processor 701. For example, when the communication device 700 is a terminal, the program or instruction is executed by the processor 701 to implement the various steps of the above-mentioned method embodiment and can achieve the same technical effect. When the communication device 700 is a network-side device, the program or instruction is executed by the processor 701 to implement the various steps of the above-mentioned method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0464] 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 above-described method embodiment. 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 can be applied to this terminal embodiment and achieve the same technical effect. Specifically, Figure 10 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0465] The terminal 100 includes but is not limited to: a radio frequency unit 101, a network module 102, an audio output unit 103, an input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109 and at least some of the components of the processor 110.

[0466] Those skilled in the art will appreciate that the terminal 100 may further include a power source (such as a battery) for powering various components. The power source may be logically connected to the processor 110 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG10 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[0467] It should be understood that in an embodiment of the present application, the input unit 104 may include a graphics processing unit (GPU) 1041 and a microphone 1042, and the graphics processor 1041 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 106 may include a display panel 1061, and the display panel 1061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 107 includes a touch panel 1071 and at least one of other input devices 1072. The touch panel 1071 is also called a touch screen. The touch panel 1071 may include two parts: a touch detection device and a touch controller. Other input devices 1072 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.

[0468] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 101 may transmit the data to the processor 110 for processing. Furthermore, the RF unit 101 may send uplink data to the network-side device. Typically, the RF unit 101 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0469] The memory 109 can be used to store software programs or instructions and various data. The memory 109 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 109 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 109 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0470] Processor 110 may include one or more processing units. Optionally, processor 110 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 110.

[0471] The radio frequency unit 101 is used to send a wake-up signal to the network side device at at least one first frequency domain position, and the wake-up signal is used to trigger the network side device to transmit SSB.

[0472] The processor 110 is configured to monitor an SSB from a network-side device at at least one second frequency domain location.

[0473] An embodiment of the present application provides a terminal. Since the terminal can send a wake-up signal to a network side device at at least one first frequency domain position to trigger the network side device to transmit SSB, that is, the network side device does not always transmit SSB to the terminal, and then after triggering the network side device to transmit SSB, the terminal monitors the SSB from the network side device at at least one second frequency domain position. In this way, the transmission of SSB of the network side device is reduced, thereby reducing the power consumption of the network side device.

[0474] 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 above-described method embodiment. 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 are applicable to this network-side device embodiment and can achieve the same technical effects.

[0475] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 11, the network-side device 900 includes an antenna 91, a radio frequency device 92, a baseband device 93, a processor 94, and a memory 95. Antenna 91 is connected to radio frequency device 92. In the uplink direction, radio frequency device 92 receives information via antenna 91 and sends the received information to baseband device 93 for processing. In the downlink direction, baseband device 93 processes the information to be transmitted and sends it to radio frequency device 92. Radio frequency device 92 processes the received information and then sends it through antenna 91.

[0476] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 93 , which includes a baseband processor.

[0477] The baseband device 93 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 9, one of the chips is, for example, a baseband processor, which is connected to the memory 95 through a bus interface to call the program in the memory 95 and execute the network device operations shown in the above method embodiment.

[0478] The network side device may further include a network interface 96, which is, for example, a common public radio interface (CPRI).

[0479] Specifically, the network side device 900 of an embodiment of the present invention also includes: instructions or programs stored in the memory 95 and executable on the processor 94. The processor 94 calls the instructions or programs in the memory 95 to execute the methods executed by the modules shown in FIG11 and achieve the same technical effect. To avoid repetition, they will not be elaborated here.

[0480] The processor 94 is configured to monitor a wake-up signal from the terminal at at least one first frequency domain location, where the wake-up signal is configured to trigger the network-side device to transmit SSB.

[0481] The radio frequency device 92 is configured to transmit the SSB at at least one second frequency domain position.

[0482] An embodiment of the present application provides a network side device. Since the network side device transmits SSB at at least one second frequency domain position only after detecting a wake-up signal from a terminal at at least one first frequency domain position, and does not transmit SSB to the terminal all the time, the transmission of SSB by the network side device is reduced, thereby reducing the power consumption of the network side device.

[0483] 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 initial access method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0484] 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.

[0485] 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.

[0486] 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.

[0487] 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.

[0488] An embodiment of the present application also 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 initial access method as described above, and the network side device can be used to execute the steps of the initial access method as described above.

[0489] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the 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.

[0490] 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.

[0491] 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. An initial access method, the method comprising: The terminal sends a wake-up signal to the network side device at at least one first frequency domain position, where the wake-up signal is used to trigger the network side device to transmit a synchronization information block SSB; The terminal monitors the SSB from the network side device at at least one second frequency domain location.

2. The method according to claim 1, wherein: The wake-up signal is also used to trigger the network side device to perform at least one of the following: system information block SIB transmission, random access channel RACH monitoring.

3. The method according to claim 1, wherein: The method further comprises: When the terminal detects the SSB from the network side device, the terminal performs a first operation, where the first operation includes at least one of the following: initial cell search, cell synchronization, cell measurement, and link failure recovery.

4. The method according to claim 1, wherein: The terminal monitors the SSB from the network side device at at least one second frequency domain position, including at least one of the following: The terminal monitors the SSB from the network side device at at least one second frequency domain position at a first moment, where the first moment is located after a first time length after the sending moment of the wake-up signal sent by the terminal; The terminal caches data of a second time length at the start time of SSB monitoring to perform SSB monitoring, where the second time length is a time length corresponding to a sending period of the SSB sent by the network side device; The first time length and the second time length are predefined by the protocol, configured by a network-side device, or reported by the terminal.

5. The method according to claim 4, wherein: The first time length is at least one of the following: After receiving the wake-up signal sent by the terminal, the network side device analyzes the analysis time of the wake-up signal; The preparation time of the network side device from receiving the wake-up signal to sending the SSB.

6. The method according to claim 1, wherein: The terminal sends a wake-up signal to a network side device at at least one first frequency domain position, including: The terminal sends a wake-up signal to a network side device at at least one first frequency domain position and at least one time domain position; The at least one time domain position is at least one of the at least one candidate time domain position configured by the network side device; The candidate time domain position includes at least one of the following: Any time domain location, a specific time domain location with the global positioning system GPS time as the time reference, a specific time domain location with the time of other cells or other radio access technologies RAT as the time reference, and a specific time domain location with the time of the last access to the cell as the time reference; The network-side device monitors the wake-up signal at the at least one candidate time domain location.

7. The method according to claim 1, wherein: The candidate frequency domain position of the at least one first frequency domain position is related to at least one of the following: Operating frequency band, subcarrier spacing SCS of the wake-up signal, related configuration of the wake-up signal, global synchronization channel GSCN number, absolute radio frequency channel ARFCN number, and frequency bands supported by the terminal.

8. The method according to claim 1, wherein: The terminal monitors the SSB from the network side device at at least one second frequency domain position, including: When the terminal receives a reply signal from the network side device, the terminal monitors the SSB from the network side device at at least one second frequency domain position; The reply information is used to indicate at least one of the following: The network side device receives a wake-up signal; Whether the network side device wakes up successfully.

9. The method according to claim 8, wherein: The reply signal includes an SSB-related configuration, and the SSB-related configuration includes at least one of the following: Time domain resources used to send SSB, frequency domain resources used to send SSB, SSB sending period, SSB sending waveform, SSB SCS, SSB sending structure, number of SSB sent, and SSB encoding method.

10. The method according to claim 1, wherein: The terminal sends a wake-up signal to a network side device at at least one first frequency domain position, including: The terminal repeatedly sends the wake-up signal to the network side device in the time domain or the frequency domain at at least one first frequency domain position; Wherein, each sending process of the repeated sending satisfies any of the following items: The sending method of each sending process is the same, and the content contained in the wake-up signal sent each time is the same; The content of the wake-up signal sent each time is the same, but the sending method is different each time; The specific content contained in each wake-up signal sent is different, but the sending method of each sending process is the same; The specific content contained in each wake-up signal sent is different, and the sending method of each sending process is different.

11. The method according to claim 1, wherein: The wake-up signal includes at least one of the following: Terminal verification related information of the terminal; information related to the terminal type of the terminal; Wake-up signal number information; information related to terminal-specific capabilities of the terminal; Related information of the network side device triggered by the wake-up signal; Information about the operator to which the terminal belongs; Related information on the type of triggering of the wake-up signal; Whether it is the indication information of allowing the trigger or stopping the trigger; The repetition mode or repetition number of the wake-up signal; The SSB transmission mode triggered by the wake-up signal; Transmission parameters corresponding to the SSB transmission mode triggered by the wake-up signal; RACH monitoring mode triggered by the wake-up signal; Monitoring parameters corresponding to the RACH monitoring mode triggered by the wake-up signal; The frequency domain position information of the SSB transmission triggered by the wake-up signal.

12. The method according to claim 1, wherein: The terminal sends a wake-up signal to a network side device at at least one first frequency domain position, including: When a wake-up signal sending condition is met, the terminal sends a wake-up signal to the network side device at the at least one first frequency domain position; The wake-up signal sending condition includes at least one of the following: The terminal is ready to perform initial access; Prepare for initial access on a frequency band capable of triggering a wake-up signal; Performing a cell search on a frequency band supported by the terminal and failing to detect an SSB; Performing a cell search on a frequency band supported by the terminal and not capable of triggering a wake-up signal and failing to detect an SSB; After the terminal searches for a cell for a period of time T, no SSB is detected; A wireless link failure occurs at the terminal; The terminal performs wireless link recovery.

13. The method according to claim 1, wherein: The relevant configuration of the wake-up signal is obtained by at least one of the following: protocol pre-definition, operator pre-configuration, network side device configuration or terminal reporting; The configuration related to the wake-up signal includes at least one of the following: A candidate frequency domain position of the at least one first frequency domain position; candidate time domain positions of the wake-up signal; The signal form of the wake-up signal; The sequence form of the wake-up signal; a method of repeatedly sending the wake-up signal; The number of times the wake-up signal is repeatedly sent; The SSB transmission mode triggered by the wake-up signal; Transmission parameters corresponding to the SSB transmission mode triggered by the wake-up signal; RACH monitoring mode triggered by the wake-up signal; The monitoring parameters corresponding to the RACH monitoring mode triggered by the wake-up signal.

14. The method according to claim 1, wherein: There is a mapping relationship between the candidate frequency domain position of the at least one second frequency domain position and the candidate frequency domain position of the at least one first frequency domain position, and the mapping relationship includes at least one of the following: one-to-one mapping, one-to-many mapping, many-to-one mapping, and many-to-many mapping.

15. The method according to claim 14, wherein: The mapping relationship includes any of the following: In a case where the number of candidate frequency domain positions of the at least one first frequency domain position is equal to the number of candidate frequency domain positions of the at least one second frequency domain position, there is a one-to-one mapping relationship between the candidate frequency domain positions of the at least one first frequency domain position and the candidate frequency domain positions of the at least one second frequency domain position; In a case where the number of candidate frequency domain positions of the at least one first frequency domain position is greater than the number of candidate frequency domain positions of the at least one second frequency domain position, there is a many-to-one mapping relationship between the candidate frequency domain positions of the at least one first frequency domain position and the candidate frequency domain positions of the at least one second frequency domain position; When the number of candidate frequency domain positions of the at least one first frequency domain position is less than the number of candidate frequency domain positions of the at least one second frequency domain position, there is a one-to-many mapping relationship between the candidate frequency domain positions of the at least one first frequency domain position and the candidate frequency domain positions of the at least one second frequency domain position.

16. An initial access method, the method comprising: The network side device monitors a wake-up signal from the terminal at at least one first frequency domain position, wherein the wake-up signal is used to trigger the network side device to transmit SSB; The network side device transmits SSB at at least one second frequency domain position.

17. The method according to claim 16, wherein: The wake-up signal is also used to trigger the network side device to perform at least one of the following: SIB transmission, RACH monitoring.

18. The method according to claim 16, wherein: Before the network side device transmits the SSB at at least one second frequency domain position, the method further includes: The network side device sends a reply signal to the terminal, where the reply signal is used to indicate at least one of the following: The network side device receives a wake-up signal; Whether the network side device wakes up successfully.

19. The method according to claim 18, wherein: The network side device sends a reply signal to the terminal, including: The network side device repeatedly sends the reply signal to the terminal in the time domain or the frequency domain; Wherein, each sending process of the repeated sending satisfies any of the following items: Each sending process is sent in the same way, and the content contained in the reply signal sent each time is the same; The content of the reply signal sent each time is the same, but the sending method is different each time; The specific content contained in each reply signal sent is different, but the sending process is the same each time; The specific content contained in the reply signal sent each time is different, and the sending method of each sending process is different.

20. The method according to claim 16, wherein: The network side device monitors a wake-up signal from a terminal at at least one first frequency domain position, including: The network side device monitors the wake-up signal network side device from the terminal at at least one first frequency domain position and at least one candidate time domain position; The candidate time domain position includes at least one of the following: Any time domain location, a specific time domain location with GPS time as the time reference, a specific time domain location with other cells or other radio access technologies RAT as the time reference, and a specific time domain location with the last access time to the cell as the time reference.

21. An initial access device, comprising: Sending module and monitoring module; The sending module is used to send a wake-up signal to the network side device at at least one first frequency domain position, and the wake-up signal is used to trigger the network side device to transmit SSB; The monitoring module is used to monitor the SSB from the network side device at at least one second frequency domain position.

22. The device according to claim 21, wherein The wake-up signal is also used to trigger the network side device to perform at least one of the following: system information block SIB transmission, random access channel RACH monitoring.

23. The method according to claim 21, wherein: The device also includes an execution module: The execution module is used to perform a first operation when an SSB from the network side device is monitored, and the first operation includes at least one of the following: initial cell search, cell synchronization, cell measurement, and link failure recovery.

24. The device according to claim 21, wherein The monitoring module is specifically used to monitor at least one of the following: At a first moment, monitoring an SSB from the network side device at at least one second frequency domain position, the first moment being located after a first time length after a sending moment of the wake-up signal sent by the terminal; Cache data of a second time length at the start time of SSB monitoring to perform SSB monitoring, where the second time length is a time length corresponding to a sending period of the SSB sent by the network side device; The first time length and the second time length are predefined by the protocol, configured by a network-side device, or reported by the terminal.

25. The device according to claim 24, wherein: The first time length is at least one of the following: After receiving the wake-up signal sent by the terminal, the network side device analyzes the analysis time of the wake-up signal; The preparation time of the network side device from receiving the wake-up signal to sending the SSB.

26. The device according to claim 21, wherein The sending module is specifically configured to send a wake-up signal to a network side device at at least one first frequency domain position and at least one time domain position; The at least one time domain position is at least one of the at least one candidate time domain position configured by the network side device; The candidate time domain position includes at least one of the following: Any time domain location, a specific time domain location with the global positioning system GPS time as the time reference, a specific time domain location with the time of other cells or other radio access technologies RAT as the time reference, and a specific time domain location with the time of the last access to the cell as the time reference; The network-side device monitors the wake-up signal at the at least one candidate time domain location.

27. The device according to claim 21, wherein The candidate frequency domain position of the at least one first frequency domain position is related to at least one of the following: Operating frequency band, subcarrier spacing SCS of the wake-up signal, related configuration of the wake-up signal, global synchronization channel GSCN number, absolute radio frequency channel ARFCN number, and frequency bands supported by the terminal.

28. The device according to claim 21, wherein The monitoring module is specifically configured to monitor the SSB from the network side device at at least one second frequency domain position when the terminal receives a reply signal from the network side device; The reply information is used to indicate at least one of the following: The network side device receives a wake-up signal; Whether the network side device wakes up successfully.

29. The device according to claim 28, wherein The reply signal includes an SSB-related configuration, and the SSB-related configuration includes at least one of the following: Time domain resources used to send SSB, frequency domain resources used to send SSB, SSB sending period, SSB sending waveform, SSB SCS, SSB sending structure, number of SSB sent, and SSB encoding method.

30. The device according to claim 21, wherein The sending module is specifically configured to repeatedly send the wake-up signal to the network side device in the time domain or the frequency domain at at least one first frequency domain position; Wherein, each sending process of the repeated sending satisfies any of the following items: The sending method of each sending process is the same, and the content contained in the wake-up signal sent each time is the same; The content of the wake-up signal sent each time is the same, but the sending method is different each time; The specific content contained in each wake-up signal sent is different, but the sending method of each sending process is the same; The specific content contained in each wake-up signal sent is different, and the sending method of each sending process is different.

31. The device according to claim 21, wherein The wake-up signal includes at least one of the following: Terminal verification related information of the terminal; information related to the terminal type of the terminal; Wake-up signal number information; information related to terminal-specific capabilities of the terminal; Related information of the network side device triggered by the wake-up signal; Information about the operator to which the terminal belongs; Related information on the type of triggering of the wake-up signal; Whether it is the indication information of allowing the trigger or stopping the trigger; The repetition mode or repetition number of times of sending the wake-up signal; The SSB transmission mode triggered by the wake-up signal; Transmission parameters corresponding to the SSB transmission mode triggered by the wake-up signal; RACH monitoring mode triggered by the wake-up signal; Monitoring parameters corresponding to the RACH monitoring mode triggered by the wake-up signal; The frequency domain position information of the SSB transmission triggered by the wake-up signal.

32. The device according to claim 21, wherein The sending module is specifically configured to send a wake-up signal to the network side device at the at least one first frequency domain position when the wake-up signal sending condition is met; The wake-up signal sending condition includes at least one of the following: The terminal is ready to perform initial access; Prepare for initial access on a frequency band capable of triggering a wake-up signal; Performing a cell search on a frequency band supported by the terminal and failing to detect an SSB; Performing a cell search on a frequency band supported by the terminal and not capable of triggering a wake-up signal and failing to detect an SSB; After the terminal searches for a cell for a period of time T, no SSB is detected; A wireless link failure occurs at the terminal; The terminal performs wireless link recovery.

33. The apparatus of claim 21, wherein: The relevant configuration of the wake-up signal is obtained by at least one of the following: protocol pre-definition, operator pre-configuration, network side device configuration or terminal reporting; The configuration related to the wake-up signal includes at least one of the following: A candidate frequency domain position of the at least one first frequency domain position; candidate time domain positions of the wake-up signal; The signal form of the wake-up signal; The sequence form of the wake-up signal; a method of repeatedly sending the wake-up signal; The number of times the wake-up signal is repeatedly sent; The SSB transmission mode triggered by the wake-up signal; Transmission parameters corresponding to the SSB transmission mode triggered by the wake-up signal; RACH monitoring mode triggered by the wake-up signal; The monitoring parameters corresponding to the RACH monitoring mode triggered by the wake-up signal.

34. The apparatus of claim 21, wherein: There is a mapping relationship between the candidate frequency domain position of the at least one second frequency domain position and the candidate frequency domain position of the at least one first frequency domain position, and the mapping relationship includes at least one of the following: one-to-one mapping, one-to-many mapping, many-to-one mapping, and many-to-many mapping.

35. The device according to claim 34, wherein The mapping relationship includes any of the following: In a case where the number of candidate frequency domain positions of the at least one first frequency domain position is equal to the number of candidate frequency domain positions of the at least one second frequency domain position, there is a one-to-one mapping relationship between the candidate frequency domain positions of the at least one first frequency domain position and the candidate frequency domain positions of the at least one second frequency domain position; In a case where the number of candidate frequency domain positions of the at least one first frequency domain position is greater than the number of candidate frequency domain positions of the at least one second frequency domain position, there is a many-to-one mapping relationship between the candidate frequency domain positions of the at least one first frequency domain position and the candidate frequency domain positions of the at least one second frequency domain position; When the number of candidate frequency domain positions of the at least one first frequency domain position is less than the number of candidate frequency domain positions of the at least one second frequency domain position, there is a one-to-many mapping relationship between the candidate frequency domain positions of the at least one first frequency domain position and the candidate frequency domain positions of the at least one second frequency domain position.

36. An initial access device, comprising: Monitoring module and transmission module; The monitoring module is used to monitor a wake-up signal from the terminal at at least one first frequency domain position, wherein the wake-up signal is used to trigger the network side device to transmit SSB; The transmission module is used to transmit SSB at at least one second frequency domain position.

37. The device according to claim 36, wherein The wake-up signal is also used to trigger the network side device to perform at least one of the following: SIB transmission, RACH monitoring.

38. The device according to claim 36, wherein The device also includes: a sending module; The sending module is configured to send a reply signal to the terminal before the transmission module transmits the SSB at at least one second frequency domain position, wherein the reply signal is used to indicate at least one of the following: The network side device receives a wake-up signal; Whether the network side device wakes up successfully.

39. The device according to claim 38, wherein The sending module is specifically configured to repeatedly send the reply signal to the terminal in the time domain or the frequency domain; Wherein, each sending process of the repeated sending satisfies any of the following items: Each sending process is sent in the same way, and the content contained in the reply signal sent each time is the same; The content of the reply signal sent each time is the same, but the sending method is different each time; The specific content contained in each reply signal sent is different, but the sending process is the same each time; The specific content contained in the reply signal sent each time is different, and the sending method of each sending process is different.

40. The apparatus of claim 36, wherein: The monitoring module is specifically used to monitor the wake-up signal network side device from the terminal at at least one first frequency domain position and at least one candidate time domain position; The candidate time domain position includes at least one of the following: Any time domain location, a specific time domain location with GPS time as the time reference, a specific time domain location with other cells or other radio access technologies RAT as the time reference, and a specific time domain location with the last access time to the cell as the time reference.

41. A terminal 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 initial access method as described in any one of claims 1 to 15 are implemented.

42. A network side device, comprising 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 initial access method as described in any one of claims 16 to 20 are implemented.

43. A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor, implements the initial access method as described in any one of claims 1 to 15, or implements the steps of the initial access method as described in any one of claims 16 to 20.

Images