A communication method, apparatus, system, and storage medium

Abstract

The application provides a communication method, device, system and storage medium. The method can be applied to an energy-saving cell wake-up scenario. When a terminal device needs to access a network device, a first message is sent to the network device, the first message comprising first information and second information. The first information is used to wake up the network device, and the second information is used to indicate transmission parameters used by the terminal device to send the first message. The terminal device receives a second message sent by the network device, the second message indicating a listening mode for a first beam set, the listening mode being dynamically determined by the network device based on the second information. The terminal device determines at least one beam corresponding to the listening mode from the first beam set. It can be seen that, by the method, the terminal device can dynamically listen to a beam matching a current channel environment based on the indication of the network device, thereby achieving reduced power consumption and improved listening flexibility.

Description

Technical Field

[0001] This application relates to the field of communications, and more particularly to a communication method, apparatus, system, and storage medium. Background Technology

[0002] In 5G communication mechanisms, System Information Block 1 (SIB1) carries crucial information necessary for user equipment (UE) to access the cell. Therefore, the base station must periodically (e.g., every 160 milliseconds) broadcast SIB1 across all beams. This periodic broadcasting mechanism presents a significant energy consumption problem: the base station must continuously transmit SIB1 regardless of whether a UE in the cell currently needs it. For example, in low-traffic scenarios (e.g., late at night, in remote areas), there may be no UE accessing the cell for an extended period, or the UEs may be in a stable, idle state. In such cases, the base station's broadcasting of SIB1 becomes a form of "idle" energy consumption, resulting in substantial and unnecessary power consumption.

[0003] To address the aforementioned issues, Rel-19 introduces an on-demand SIB1 (OD-SIB1) mechanism. The core of this mechanism is that when there is no UE demand, the base station can cease periodically broadcasting SIB1 and enter a "light sleep" state, significantly reducing power consumption. When a UE does need SIB1 (e.g., for cell reselection or initial access), the UE actively sends an uplink wake-up signal (UL-WUS) to wake up the base station. After being woken up by UL-WUS, the base station sends SIB1 once "on demand" for the UE to receive. Specifically, the UE first completes synchronization through the synchronization signal block (SSB) beam, then receives the master information block (MIB) to obtain SIB1 scheduling information (such as transmission period, resource location, etc.) from the MIB, and then receives SIB1 based on this scheduling information. The SSB beam is a directional beam used in the 5G network for transmitting SSBs.

[0004] However, there can be multiple (e.g., 64) SSB beams between the UE and the base station. Although the OD-SIB1 mechanism solves the power consumption problem of the base station, it introduces a new technical problem: after the UE sends UL-WUS, which SSB beams should the UE listen to in order to receive the SIB1 sent by the base station? Summary of the Invention

[0005] This application provides a communication method, device, system, and storage medium that can dynamically determine the monitoring mode and improve monitoring flexibility.

[0006] Firstly, a communication method is provided. This method can be executed by a terminal device, or by a component (such as a circuit, chip, or chip system) configured in the terminal device, or by a logic module or software capable of implementing all or part of the functions of the terminal device. This application does not limit this approach. The following description uses a terminal device as an example.

[0007] The method includes: when a terminal device needs to access a network device, the terminal device sends a first message to the network device, the first message including first information and second information. The first information is used to wake up the network device, and the second information is used to indicate the transmission parameters used by the terminal device to send the first message. The terminal device receives a second message sent by the network device, the second message indicating a monitoring mode for a first beam set, the monitoring mode being determined by the network device based on the second information, where beams in the first beam set are used to transmit synchronization signals to the terminal device. That is, the network device dynamically determines the monitoring mode for the first beam set based on the second information sent by the terminal device. The terminal device determines at least one beam from the first beam set corresponding to the monitoring mode in order to monitor that at least one beam. Therefore, this method can dynamically monitor beams matching the current channel environment based on the network device's instructions, thereby improving monitoring flexibility while reducing power consumption.

[0008] Secondly, a communication method is provided, which can be executed by a network device, or by a component (such as a circuit, chip, or chip system) configured in the network device, or by a logic module or software capable of implementing all or part of the functions of the network device. This application does not limit this. The following description uses a network device (such as a base station) as an example.

[0009] The method includes: a network device receiving a first message sent by a terminal device, the first message including first information and second information, the first information being used to wake up the network device, and the second information being used to indicate the transmission parameters used by the terminal device when sending the first message. The network device determines a listening mode based on the second information, the listening mode being used to guide the terminal device's strategy for listening to a first beam set, the beams in the first beam set being used to transmit synchronization signals to the terminal device. The network device sends a second message to the terminal device, the second message indicating the listening mode. In this implementation, the second information reflects the state of the uplink channel, allowing the network device to dynamically determine the listening mode based on the second information, so that the used listening mode matches the current channel environment.

[0010] The second aspect is the implementation on the network device side, which corresponds to the first aspect. The explanations, supplements, and descriptions of the beneficial effects of the first aspect also apply to the second aspect, and will not be repeated here.

[0011] Thirdly, a communication device is provided, comprising a processing module and a transceiver module. The transceiver module is configured to send a first message to a network device, the first message including first information and second information, the first information being used to wake up the network device, and the second information being used to indicate transmission parameters used by a terminal device to send the first message; the transceiver module is also configured to receive a second message sent by the network device, the second message indicating a monitoring mode for a first beam set, the monitoring mode being determined by the network device based on the second information, and beams in the first beam set being used to transmit synchronization signals to the terminal device; the processing module is configured to determine at least one beam for monitoring from the first beam set based on the monitoring mode.

[0012] Fourthly, a communication device is provided, comprising a transceiver module. The transceiver module is configured to receive a first message sent by a terminal device, the first message including first information and second information, the first information being used to wake up a network device, and the second information being used to indicate the transmission parameters used by the terminal device when sending the first message; a processing module is configured to determine a monitoring mode based on the second information, the monitoring mode being used to guide the terminal device in a strategy for monitoring a first beam set, the beams in the first beam set being used to transmit synchronization signals to the terminal device; the transceiver module is also configured to send the first message to the terminal device, the second message indicating the monitoring mode.

[0013] The third and fourth aspects are the implementation on the device side corresponding to the first and second aspects. The explanations, supplements, and descriptions of the beneficial effects of the first and second aspects also apply to the third and fourth aspects, and will not be repeated here.

[0014] Fifthly, a communication device is provided, including a processor. The processor is coupled to a memory and can be used to execute instructions or data in the memory to implement the method in any possible implementation of the first aspect described above. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface.

[0015] In one implementation, the communication interface may be a transceiver, or an input / output interface.

[0016] In another implementation, the communication device is a chip configured in a terminal device. When the communication device is a chip configured in a terminal device, the communication interface can be an input / output interface.

[0017] In a sixth aspect, a communication device is provided, including a processor. The processor is coupled to a memory and can be used to execute instructions or data in the memory to implement the method in any possible implementation of the second aspect described above. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface.

[0018] In one implementation, the communication interface may be a transceiver, or an input / output interface.

[0019] In a seventh aspect, a processor is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive signals through the input circuit and transmit signals through the output circuit, causing the processor to execute a method in any possible implementation of any aspect.

[0020] In specific implementation, the processor can be one or more chips, the input circuit can be input pins, the output circuit can be output pins, and the processing circuit can be transistors, gate circuits, flip-flops, and various logic circuits. The input signal received by the input circuit can be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit can be, for example, but not limited to, output to and transmitted by a transmitter. Furthermore, the input circuit and the output circuit can be the same circuit, which is used as both the input circuit and the output circuit at different times. This application does not limit the specific implementation of the processor and various circuits.

[0021] Eighthly, a communication device is provided, including a processor and a memory. The processor is used to read instructions stored in the memory, receive signals via a receiver, and transmit signals via a transmitter to execute the method in any possible implementation of any of the preceding aspects.

[0022] Optionally, the processor may be one or more, and the memory may be one or more.

[0023] Ninthly, a computer program product is provided, the computer program product comprising: a computer program (also referred to as code or instructions) that, when the computer program is run, causes a computer to perform a method in any possible implementation of any of the above aspects.

[0024] In a tenth aspect, a computer-readable storage medium is provided that stores a computer program (also referred to as code or instructions) that, when run on a computer, causes the computer to perform the methods in any possible implementation of any of the preceding aspects.

[0025] Eleventhly, embodiments of this application provide a chip system including one or more processors for calling and executing instructions stored in memory, causing the methods in any of the above aspects or possible implementations to be executed. The chip system may be composed of chips or may include chips and other discrete devices.

[0026] The chip system may include input circuits or interfaces for transmitting information or data, and output circuits or interfaces for receiving information or data.

[0027] In a twelfth aspect, a communication system is provided, including the aforementioned terminal device and network device. Optionally, the communication system may further include other devices that communicate with the terminal device and / or network device. Attached Figure Description

[0028] Figure 1 A communication system structure diagram provided in this application embodiment;

[0029] Figure 2 This is a schematic diagram of a UE sending an uplink wake-up signal;

[0030] Figure 3 A flowchart illustrating the interaction of a communication method provided in this application embodiment;

[0031] Figure 4 This is a schematic diagram of an enhanced uplink wake-up signal structure provided in an embodiment of this application;

[0032] Figure 5 This application provides a schematic diagram of a monitoring mode division in an embodiment.

[0033] Figure 6 This is a schematic diagram illustrating the differences between different listening modes provided in an embodiment of this application;

[0034] Figures 7a to 7d A schematic diagram of a listening beam provided in an embodiment of this application;

[0035] Figure 8 This is a schematic diagram of a UE wake-up target base station provided in an embodiment of this application;

[0036] Figure 9 A structural diagram of a communication device provided in an embodiment of this application;

[0037] Figure 10 This is a structural diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0038] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0039] The technical solutions provided in this application can be applied to various communication systems, such as: Global System for Mobile Communications (GSM) systems, General Packet Radio Service (GPRS), Wireless Local Area Network (WLAN), Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, sidelink communication systems, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, non-terrestrial network (NTN) communication systems, 5th generation (5G) mobile communication systems, or new radio access technology (NR). Among these, 5G mobile communication systems can include non-standalone (NSA) and / or standalone (SA) networking. The technical solutions provided in this application can also be applied to future communication systems. This application does not limit the scope of these applications.

[0040] Figure 1 This is a schematic diagram of a communication system 100 used in an embodiment of this application. The communication system 100 may include network devices, such as... Figure 1 The network device 110 is shown. The communication system 100 may also include terminal devices, such as... Figure 1 The terminal device 120 shown. The network device 110 and the terminal device 120 can communicate via a wireless link.

[0041] Figure 1 An exemplary network device 110 and a terminal device 120 are shown. Optionally, the communication system 100 may also include multiple network devices and / or multiple terminal devices.

[0042] The network equipment in this application can be network-side equipment such as access network equipment and core network equipment. Access network equipment is sometimes also called an access node. Access network equipment has wireless transceiver capabilities for communicating with terminals. Access network equipment includes, but is not limited to, base stations (BS), evolved NodeBs (eNodeBs), transmission reception points (TRPs) in the aforementioned communication systems, next-generation NodeBs (gNBs) in 5G mobile communication systems, access network equipment or modules of access network equipment in open RAN (ORAN) systems, satellites in NTN communication systems, base stations in future mobile communication systems, or access nodes in WiFi systems. Access network equipment can also be modules or units capable of implementing some of the functions of a base station. Access network equipment can be a macro base station (such as...). Figure 1 The access network device can be a micro base station or indoor station, a relay node or donor node, or a wireless controller in a cloud radio access network (CRAN) scenario. Optionally, the access network device can also be a server, wearable device, or vehicle-mounted device. For example, in vehicle-to-everything (V2X) technology, the access network device can be a roadside unit (RSU). Multiple access network devices in a communication system can be base stations of the same type or different types. Base stations can communicate with terminals directly or via relay stations. Terminals can communicate with multiple base stations using different access technologies. The embodiments of this application do not limit the specific technology or device form used in the access network device. In this application, the access network device is referred to as a network device.

[0043] In this application, the means for implementing the functions of a network device can be a network device itself, or a means capable of supporting the network device in implementing those functions, such as a processor, circuit, chip, or chip system. This means can be installed in or connected to the network device. In the technical solutions provided in this application, the example of a network device being used to implement the functions of a network device is used to describe the technical solutions provided in this application.

[0044] The terminal device in this application can be a wireless terminal device capable of receiving network device scheduling and instruction information. The wireless terminal device can be a device providing voice and / or data connectivity to a user, a handheld device with wireless connectivity, or other processing devices connected to a wireless modem. For example, the terminal device can communicate with one or more core networks or the Internet via a radio access network (RAN). The terminal device can also be referred to as a terminal, user equipment (UE), mobile station, mobile terminal, etc. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), ultra-reliable low-latency communication (URLLC), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, or satellite communication, etc. The terminal can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, wearable device, vehicle, aircraft (such as drone, helicopter, airplane), hot air balloon, ship, robot, robotic arm, or smart home device, etc. The embodiments of this application do not limit the form of the terminal device.

[0045] In this application, the apparatus for implementing the functions of a terminal device can be the terminal device itself, or any apparatus capable of supporting the terminal device in implementing those functions, such as a processor, circuit, chip, or chip system. This apparatus can be installed in or connected to the terminal device. In the technical solutions provided in this application, the example of a terminal device being used to implement the functions of a terminal device is used to describe the technical solutions provided in this application.

[0046] Access network equipment and / or terminal equipment can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; on water; or in the air on aircraft, balloons, and satellites. This application does not limit the application scenarios of the access network equipment and terminal equipment. They can be deployed in the same or different scenarios; for example, both can be deployed on land simultaneously; or the access network equipment can be deployed on land while the terminal equipment is deployed on water, etc., and so on.

[0047] In practical applications, multiple network devices can collaborate to assist terminals in achieving wireless access, with different network devices each implementing a portion of the base station's functions. For example, network devices can be central units (CUs), distributed units (DUs), CUs (control planes, CPs), CUs (user planes, UPs), or radio units (RUs), etc. CUs and DUs can be set up separately or included in the same network element, such as a baseband unit (BBU). RUs can be included in radio frequency equipment or radio frequency units, such as remote radio units (RRUs), active antenna units (AAUs), or remote radio heads (RRHs).

[0048] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called O-CU (Open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules. CU (or CU-CP and CU-UP), DU, and RU can implement different protocol layer functions.

[0049] To facilitate understanding of the embodiments of this application, the terminology used in this application will be briefly explained first. Optionally, the explanation of some terms may also refer to the explanations in the 3rd Generation Partnership Project (3GPP) standard protocol.

[0050] Before receiving SIB1, the UE must first complete downlink synchronization and obtain the most basic system information. Specifically, this includes the following processes:

[0051] 1. Primary synchronization signal (PSS) and secondary synchronization signal (SSS)

[0052] The UE achieves time and frequency synchronization and determines the physical cell identifier (PCI) of the cell by searching the PSS and SSS. The UE uses the PCI to distinguish the radio signals of different cells.

[0053] 2. Decode the master information block (MIB).

[0054] After synchronization is complete, the UE decodes the MIB in the physical boardcast channel (PBCH). This MIB is the "key" to SIB1 and contains crucial parameters: (1) System frame number: helps the UE align time; (2) pdcch-ConfigSIB1: This is a very critical parameter that tells the UE the configuration of the control resource set (CORESET) used to listen to SIB1 scheduling information, as well as the number of candidates in the search space; (3) Demodulation reference signal (DMRS) position: helps the UE correctly demodulate the subsequent physical downlink shared channel (PDSCH).

[0055] 3. SIB1

[0056] Once the UE learns about the MIB, it understands the transmission pattern of SIB1. Since SIB1 is not transmitted continuously but is broadcast according to fixed periods and windows, this allows the UE to save power by using discontinuous reception.

[0057] In 5G NR, the period of SIB1 is configured by the network (e.g., 160ms, 320ms, etc.). This means that SIB1 occurs only once every such time interval. Moreover, within each period, the network allocates a specific "window" (e.g., 20ms long), and SIB1 transmissions only occur within this window. The UE uses the system frame number information in the MIB, combined with the aforementioned period, to accurately calculate the start time of the next SIB1 window. When the calculated SIB1 window arrives, the UE begins listening at the physical layer.

[0058] Once the UE successfully receives and parses SIB1, it obtains an "admission ticket." SIB1 contains information such as whether the cell is blocked, access restrictions (e.g., a list of public land mobile networks), and scheduling cycles and mappings for other system information (SIB2, SIB3, etc.). If the UE does not obtain SIB1, it cannot perform subsequent random access (initiate a call or access the internet).

[0059] It should be understood that the technical terms used in this application are for illustrative purposes only and not as limiting. For example, as technology evolves, technical terms may also change, and other technical terms that have the same technical meaning should also apply to this application.

[0060] While the OD-SIB1 mechanism solves the static power consumption problem of base stations, it introduces a new technical problem: after the UE sends UL-WUS, which SSB beams should it listen to in order to efficiently and reliably receive the SIB1 sent by the base station on demand?

[0061] To address the aforementioned issues, a solution has been proposed that defines two monitoring modes: one monitoring only the associated SSB beam, and the other monitoring all transmitted SSB beams. The associated SSB beam refers to the beam associated with the UL-WUS transmitted by the UE.

[0062] In the first monitoring mode, the UE only monitors the SSB beam associated with its transmitted UL-WUS. This monitoring mode has low power consumption because it only needs to monitor the physical downlink control channel (PDCCH) on one beam. However, in wireless communication scenarios, the channel environment is dynamic. When the UE moves or the channel fades, the UE's optimal beam may change. If the base station continues to transmit SIB1 on the original SSB beam, the UE may fail to receive signals due to poor channel quality.

[0063] For the second monitoring mode, the UE listens to the PDCCH on all SSB beams. In this mode, the UE can always find the SSB beam with the best signal to receive SIB1. However, since the UE needs to perform full beam scanning, the power consumption is extremely high, which runs counter to the original intention of NES energy saving.

[0064] Currently, a 1-bit indicator is used to statically indicate to the UE which of the two listening modes to use. The UE then determines the listening mode based on this indicator. For example, when the indicator is TRUE, the UE uses the first listening mode; when the indicator is FALSE, the UE uses the second listening mode.

[0065] For example, Figure 2The diagram illustrates an on-demand SIB reception process indicated by a 1-bit indicator. The source base station sends UL-WUS configuration information to the UE, which includes the indicator. The UE determines whether the conditions for sending an uplink wake-up signal are met. If so, it sends the uplink wake-up signal to the target base station. Upon receiving the uplink wake-up signal, the target base station sends a random access response (RAR) message to the UE. This RAR message, often referred to as Msg2, contains key resource scheduling information required for the UE to complete random access. After receiving the RAR message, the UE listens for the target base station's SIB1 transmission in the corresponding SSB beam, based on the listening mode specified by the indicator from the source base station. The target base station is defined as a base station with energy-saving capabilities.

[0066] However, this static configuration method using a 1-bit indicator cannot cope with the real-time, dynamically changing communication scenarios of the UE. This method forces the network to choose between "extremely low reliability" and "extremely high reliability," lacking flexibility. Furthermore, it cannot balance the actual channel quality and stability of the UE. How to enable the base station to dynamically determine the monitoring mechanism based on the UE's real-time communication environment is an urgent technical problem to be solved.

[0067] Based on this, this application provides a communication method in which a terminal device sends a first message to a network device. The first message includes first information and second information. The first information is used to wake up the network device, and the second information is used to indicate the transmission parameters used by the terminal device to transmit the first message. After receiving the first message, the network device determines a monitoring mode based on the second information. This monitoring mode indicates a monitoring strategy for a first beam set. The network device then sends a second message to the terminal device, indicating the monitoring mode. The terminal device determines at least one beam from the first beam set for monitoring based on the monitoring mode. In this scheme, the terminal device can report its corresponding transmission parameters to the network device via the first message, thereby enabling the network device to determine the actual channel quality and channel stability characteristics based on the second information, and thus determine the monitoring mode based on these characteristics to adapt to changes in different scenarios.

[0068] The solution provided in this application will be described in detail below with reference to the corresponding flowcharts. It is understood that the illustrative flowcharts provided in this application primarily use different devices (e.g., terminal devices, network devices) as examples of the execution subjects of this interactive illustration to illustrate the method, but this application does not limit the execution subjects of the interactive illustrations. For example, the devices (e.g., terminal devices, network devices) in the illustrative flowcharts can also be chips, chip systems, or processors that support the implementation of this method on the device, or logic modules or software that can implement all or part of the functions of the device.

[0069] As a general statement, the message or signaling interactions involved in the interaction process of this application embodiment can be standard messages or signaling or newly introduced messages or signaling. This application embodiment does not make specific limitations on this.

[0070] Figure 3 This is a schematic diagram illustrating a communication method according to an embodiment of this application. It can be understood that... Figure 3 The terminal device in the middle can be Figure 1 Any terminal device in the context of network equipment can refer to any component within that terminal device (such as a processor, chip, or chip system). Network equipment can be... Figure 1 Any access network device, or a component within an access network device (such as a processor, chip, or chip system). Figure 3 As shown, the method includes the following steps:

[0071] S301: The terminal device sends a first message to the network device, the first message including first information and second information, and the network device receives the first message accordingly.

[0072] In this embodiment, when preset conditions are met, the terminal device sends a first message to the network device to wake up the network device using the first information in the first message. The second information in the first message indicates the transmission parameters used by the terminal device to transmit the first message. The preset conditions refer to the conditions that require waking up the network device, such as when the terminal device needs SIB1 due to cell reselection, and sends the first message to the network device.

[0073] The first message is an enhanced uplink wake-up signal (E-UL WUS), which can carry not only first information for waking up network devices, but also second information. Specifically, the first information includes a random access preamble, and the second information includes information such as the transmission power and transmission frequency used by the terminal device when sending the first message.

[0074] For example, Figure 4The diagram shows the structure of the first message, which comprises two parts: Part A and Part B. Part A indicates first information, and Part B indicates second information. Specifically, Part A can retain the traditional Zadoff-Chu (ZC) sequence of the physical random access channel (PRACH). This sequence serves two functions in this embodiment: first, the network device finds the ZC sequence through correlation detection, detects the arrival of a "WUS" request, and implements wake-up; second, the network device performs channel estimation upon detecting the ZC sequence, and the channel estimation result is used as the demodulation reference signal (DMRS) for Part B. That is, the ZC sequence in Part A can be used to demodulate Part B, eliminating the need for Part B to carry an additional DMRS, thus saving overhead.

[0075] Part B can be a compact data block carrying bit data, modulated using quadrature phase shift keying (QPSK), and can carry a 13-bit payload. Specifically, Part B can occupy a pre-configured small resource block adjacent to Part A. Part B can specifically include the following three parts:

[0076] (1) Transmission Power (occupies 6 bits). The transmission power of the first message can range from -40dBm to +23dBm, with an accuracy of 1dB (64 levels in total). Normally, network devices cannot know the transmission power used by the terminal device when sending the first message; the terminal device needs to report the transmission power. By reporting, the network device can use the transmission power and its own measured received power to determine the uplink signal-to-noise ratio or path loss. That is, the network device determines the uplink channel quality.

[0077] (2) Transmission Frequency (occupies 5 bits). The transmission frequency of the first message corresponds to the index of 32 pre-configured frequency resources. When the terminal device reports via the first message, it can report the index of the frequency resource it uses (e.g., index 000010 corresponds to 3510.2MHz). Through this reporting, the network device can determine the Doppler spread using the transmission frequency and the receiving frequency measured by the network device itself. That is, the network device determines the uplink channel stability.

[0078] (3) The current listening mode used by the terminal device (occupying 2 bits). In this embodiment, the listening mode can be divided into 4 modes, which can be indicated by 2 bits, namely 00, 01, 10, and 11. That is, the terminal device reports the listening mode it used before sending the first message. The network device uses the listening mode reported by the terminal device as an auxiliary input for prediction to improve the accuracy of prediction. For example, when the listening mode reported by the UE is inconsistent with the prediction of the network device, the network device corrects the listening mode reported by the UE to the listening mode dynamically determined by the network device.

[0079] It should be noted that, to improve error correction capability, the 13-bit information can be combined with an 8-bit error check code to form a 21-bit payload. Since Part A is multiplexed as DMRS in the first message, Part B does not require additional DMRS, and all resource units occupied by Part B can be used to carry data. For example, if Part B occupies 2 physical resource blocks (PRBs) * 4 orthogonal frequency division multiplexing (OFDM) symbols, then Part B occupies a total of (2 * 12) subcarriers * 4 OFDM symbols = 96 (resource units). When Part B is modulated using QPSK (each resource unit carries 2 coded bits), the number of coded bits is 96 * 2 = 192 coded bits. Then, polar codes are used to encode the 21-bit payload into 192 coded bits, resulting in a code rate of 21 / 192, approximately 0.109. This is an extremely low code rate (far lower than conventional control channels such as PUCCH), which means extremely high redundancy and strong error correction capability, ensuring that the base station can reliably demodulate 13 bits of information even at the cell edge (extremely low SINR).

[0080] S302: The network device determines a listening mode based on the second information. This listening mode is used to guide the terminal device in its strategy of listening to a first beam set, in which beams are used to transmit synchronization signals to the terminal device.

[0081] In this embodiment, after receiving the first message, the network device parses the first message to obtain first information and second information. Based on the first information, it determines that it needs to be woken up, and based on the second information, it determines the monitoring mode. The monitoring mode is used to instruct the terminal device on a strategy for monitoring a first beam set, so that it can determine which beams in the first beam set should be monitored based on this strategy, thereby enabling it to receive relevant information sent by the network device. The beams in the first beam set are used to transmit synchronization signals to the terminal device, which are used to achieve time synchronization and / or frequency synchronization between the terminal device and the network device.

[0082] In some implementations, S302 can be specifically implemented as follows: the network device obtains the transmission power and transmission frequency based on the second information; the network device determines the signal-to-noise ratio (SNR) based on the transmission power and the Doppler spread based on the transmission frequency; the network device determines the monitoring mode based on the SNR and the Doppler spread. In this implementation, the second information carries the transmission power and transmission frequency corresponding to the first message. The network device determines the transmission power and transmission frequency through the second information, uses the transmission power to determine the SNR of the uplink channel, and uses the transmission frequency to determine the Doppler spread, and then determines the matching monitoring mode based on the SNR and the Doppler spread.

[0083] In some implementations, if the second information is modulated information, the network device obtains the transmission power and transmission frequency based on the second information, including: the network device demodulates the second information using the first information to obtain the transmission power and transmission frequency. That is, by using the first information to demodulate the second information, there is no need to carry the demodulation reference signal required for demodulating the second information in the first message, thus saving overhead.

[0084] Specifically, the network device performs uplink channel estimation based on the first information to obtain the estimation result, and uses the estimation result to demodulate the second information to obtain the transmission power and transmission frequency.

[0085] Specifically, the network device determines the signal-to-noise ratio (SNR) based on the transmission power, including: the network device acquiring the received power corresponding to the reception of the first message, and determining the SNR as the ratio of the transmission power to the power difference. Here, the power difference is the difference between the received power and the transmission power.

[0086] For example, the signal-to-noise ratio can be determined using the following formula:

[0087]

[0088]

[0089] in, This indicates the transmission power when the terminal device sends a wake-up signal. It is the total received power measured in real time by the physical layer when the network device receives the wake-up signal. This represents the power difference, i.e., the total power of interference and noise.

[0090] Specifically, the network device determines the Doppler spread based on the transmission frequency, including: the network device acquiring the receiving frequency corresponding to the reception of the first message, and determining the Doppler spread based on the receiving frequency and the transmission frequency.

[0091] For example, the frequency offset can be determined using the following formula:

[0092]

[0093] in, Indicates the frequency offset. Indicates the frequency at which the network device receives the first message. This indicates the frequency at which the terminal device sends the first message.

[0094] Furthermore, the Doppler spread can be determined based on the frequency shift. Specifically, it can be determined using the following formula:

[0095]

[0096] in, Indicates Doppler expansion, The radial velocity of the UE, This indicates the frequency of the carrier signal corresponding to the transmission of the first message.

[0097] In some implementations, the network determines the monitoring mode based on the signal-to-noise ratio and Doppler spread, which may include the following:

[0098] (1) If the signal-to-noise ratio is greater than or equal to the first threshold and the Doppler spread is less than the second threshold, the network device determines the listening mode as the first listening mode, which indicates that only the first beam associated with the first message is listened to, and the first beam set includes the first beam.

[0099] (2) If the signal-to-noise ratio is less than the first threshold and the Doppler spread is less than the second threshold, the network device determines the monitoring mode as the second monitoring mode. The second monitoring mode indicates that the first beam and the second beam adjacent to the first beam are being monitored. The first beam set includes the second beam.

[0100] (3) If the signal-to-noise ratio is greater than or equal to the first threshold and the Doppler spread is greater than or equal to the second threshold, the network device determines the monitoring mode as the third monitoring mode, which indicates the monitoring of the first beam, the second beam and the third beam adjacent to the second beam.

[0101] (4) If the signal-to-noise ratio is less than the first threshold and the Doppler spread is greater than or equal to the second threshold, the network device determines the monitoring mode as the fourth monitoring mode, which indicates that the full beam is being monitored.

[0102] In practical implementation, after determining the signal-to-noise ratio and Doppler spread, the network device compares them with two preset thresholds to form a 2x2 decision matrix. This decision matrix can dynamically map four monitoring modes. For example, Figure 5The decision matrix diagram shown illustrates four monitoring modes indicated by 2 bits (XX). The left "X" (the first bit) is associated with the signal-to-noise ratio, and the right "X" is associated with the Doppler spread. The judgment logic is as follows:

[0103] When SINR (signal-noise ratio) ≥ SINR-Threshold (first threshold), the channel quality is good and is judged as "high SINR", with the first bit set to "1"; otherwise, it is "0".

[0104] When BD (Doppler spread) ≥ BD-Threshold (first threshold), the channel is unstable and is classified as "large Doppler," with the second bit set to "1"; otherwise, it is set to "0." Specifically, the monitoring strategies, application scenarios, and judgment conditions corresponding to the above four monitoring modes are as follows: Figure 6 As shown. For example, the monitoring strategy corresponding to monitoring mode 10 is to only monitor the SSB beam associated with UL-WUS, the application scenario is extremely power-saving or single beam, and the judgment condition is... and The advantage of this monitoring mode is the lowest power consumption, while the disadvantage is lower reliability. For example, monitoring mode 11 corresponds to a monitoring strategy that monitors the associated SSB and the 2 to 4 adjacent SSB beams (including the second and third beams). Its application scenarios include insufficient steady-state operation or multiple clusters. The judgment condition is... and The advantage of this monitoring mode is high reliability, but it also consumes more power.

[0105] In this embodiment, after the network device determines the listening mode, the network device sends a third message using at least one beam corresponding to the listening mode. This third message is used to guide the terminal device to access the network device. For example, the third message is SIB1.

[0106] S303: The network device sends a second message to the terminal device, which indicates the listening mode, and the terminal device receives the second message accordingly.

[0107] In some implementations, if the second information also includes the monitoring mode currently used by the terminal device, after the network device determines the monitoring mode based on the second information but before the network device sends the second message to the terminal device, if the monitoring mode determined by the network device is different from the monitoring mode currently used by the terminal device, the network device adds indication information to the second message. This indication information is used to indicate the monitoring mode determined by the network device. That is, if the monitoring mode determined by the network device based on the second information is different from the monitoring mode reported by the terminal device, the network device adds indication information to the second message to indicate the dynamically determined monitoring mode. If the monitoring mode determined by the network device based on the second information is the same as the monitoring mode reported by the terminal device, there is no need to add knowledge information to the second message, and the terminal device directly determines the beam to be monitored based on the current monitoring mode.

[0108] S304: The terminal device determines at least one beam for monitoring from the first beam set based on the monitoring mode.

[0109] After receiving the second message, the terminal device determines the listening mode based on the second message, and determines at least one beam for listening from the first beam set based on the listening mode.

[0110] In some implementations, S304 can be specifically implemented in the following ways:

[0111] If the monitoring mode is the first monitoring mode, the terminal device determines the first beam associated with the first message in the first beam set as the beam to be monitored. The first monitoring mode indicates that only the first beam is being monitored.

[0112] If the monitoring mode is the second monitoring mode, the terminal device determines the first beam and the second beam adjacent to the first beam in the first beam set as the beams to be monitored. The second monitoring mode indicates that both the first beam and the second beam are being monitored.

[0113] If the monitoring mode is the third monitoring mode, the terminal device will determine the first beam, the second beam, and the third beam adjacent to the second beam in the first beam set as the beams to be monitored. The third monitoring mode indicates that the first beam, the second beam, and the third beam will be monitored.

[0114] If the monitoring mode is the fourth monitoring mode, the terminal device will identify all beams in the first beam set as the beams to be monitored. The fourth monitoring mode indicates that all beams in the first beam set will be monitored.

[0115] For example, the first beam set includes 8 SSB beams, and the transmission diagrams corresponding to different monitoring modes are as follows: Figures 7a-7d As shown:

[0116] like Figure 7a As shown, when the monitoring mode is the first monitoring mode 10, only beam #3 (the first beam) needs to be monitored.

[0117] like Figure 7b As shown, when the monitoring mode is the second monitoring mode 00, if the first beam is beam #0 (or beam #7), the second beam adjacent to the first beam is beam #1 (or beam #6); if the first beam is a beam other than beam #0 or beam #7, for example... Figure 7b If the first beam is #3, then the second beams adjacent to the first beam are #2 (adjacent to SSB1) and #4 (adjacent to SSB2).

[0118] like Figure 7c As shown, when the monitoring mode is the third monitoring mode 11, if the first beam is beam #0, the second beam adjacent to the first beam is beam #1 (adjacent SSB1), and the third beam is #2 (adjacent SSB2); if the first beam is beam #1, the second beam adjacent to the first beam is beam #0 (adjacent SSB1), beam #2 (adjacent SSB2), and the third beam is #3 (adjacent SSB3); if the first beam is beam #3, the second beam adjacent to the first beam is beam #2 (adjacent SSB2), beam #4 (adjacent SSB3), and the third beam is #1 (adjacent SSB1) and #5 (adjacent SSB4).

[0119] like Figure 7d As shown, when the monitoring mode is the fourth monitoring mode 01, all beams from #0 to #7 are monitored.

[0120] It should be noted that, Figures 7a to 7b This example uses 8 beams as an example, so the `groupPresence` field is invalid; only the `inOneGroup` field is used to determine which beams to listen to. When there are more beams, such as 64 beams, they are divided into 8 groups of 8. In this scenario, to determine the beams to listen to, the `groupPresence` field is first used to determine the specified group, and then the `inOneGroup` field is used to determine which beams within that group are to be listened to.

[0121] After the terminal device determines at least one beam to be monitored, it listens for a third message sent by the network device on at least one beam. This third message guides the terminal device to access the network device. For example, the third message is SIB1.

[0122] It is evident that the terminal device can report its corresponding physical layer capabilities to the network device through the first message, thereby enabling the network device to determine the actual channel quality and channel stability based on the second information, and thus determine the monitoring mode based on this feature to adapt to changes in different scenarios.

[0123] For a better understanding of the implementation framework of this application, please refer to [link / reference]. Figure 8 This figure is a signaling interaction flowchart for UE wake-up of a power-saving base station provided in an embodiment of this application, as shown below. Figure 8 As shown, the process includes:

[0124] (1) Initial configuration. The source base station sends configuration information about the wake-up signal (UL-WUS) to the UE via RRC signaling. This configuration information includes the time and frequency resources for sending the wake-up signal, the transmission power, the transmission frequency, and the listening mode.

[0125] (2) Waiting to be woken up. The UE stores the configuration information about the wake-up signal sent by the source base station. When the UE needs SIB1 due to cell reselection or other reasons, the conditions for sending the wake-up signal are met.

[0126] (3) Sending a wake-up signal. The UE sends an enhanced uplink wake-up signal E-UL WUS (including Part A and Part B) to the energy-saving base station (target base station) on the designated PRACH resource.

[0127] (4) Signal measurement and decoding. After the target successfully receives E-UL WUS, it performs the following actions: Part A is found through correlation detection, and the target base station is woken up; using the channel estimation results of Part A, Part B is demodulated to recover 13 bits of payload data; the base station measures the received power and received frequency of E-UL WUS at the physical layer.

[0128] (5) Determine the listening mode. The target base station determines the SINR of the uplink channel based on the received power and the Doppler spread based on the received frequency. Then, the target base station compares the SINR and Doppler spread with preset thresholds and determines the listening mode based on the comparison results. That is, a 2-bit mode index (10, 00, 11 or 01) is determined.

[0129] (6) Listening mode feedback. The base station constructs a RAR message and carries a 2-bit field in the RAR message (this field can be a newly added field or a reused existing field). The value of this field is the index corresponding to the listening mode determined in step (5).

[0130] (7) Parse the monitoring mode. After the UE successfully receives and decodes the RAR message, it extracts a 2-bit mode index and determines the list of SSB beams to be monitored based on the mode index. For example, if the mode index is 10, it only monitors the associated SSB beams; if the mode index is 01, it monitors all SSB beams.

[0131] (8) On-demand transmission. The target base station only sends PDCCH to schedule SIB1 on the SSB beam list corresponding to the 2-bit mode index; the UE only listens for PDCCH on the SSB beam list specified by the 2-bit mode index; the UE successfully receives PDCCH and SIB1, completes the on-demand transmission process, and the UE power consumption reaches the optimal level.

[0132] As can be seen from the above process, the technical solution provided in this application embodiment has the following five improvements:

[0133] (1) When the base station receives an enhanced uplink wake-up signal each time, it will determine the listening mode that matches the current environment in real time based on the enhanced uplink wake-up signal, realizing the change from "static configuration" to "dynamic intelligent decision-making", so that the reception of SIB1 can adapt to the real-time channel environment one by one.

[0134] (2) This application adds two intermediate states, "Power Saving Enhancement / Small Cluster" (Mode 00) and "Insufficient Steady State / Multiple Clusters" (Mode 11), between the original Mode 10 and Mode 01, providing the ability to "trade" and avoiding the original coarse options. For example, when the channel is only slightly degraded (such as in Mode 00), the base station can instruct the UE to increase the number of listeners by only a small amount (such as listening to 3 SSBs), instead of being forced to jump to "Full SSB Scan" (Mode 01). This achieves the minimization of power consumption while ensuring reliability.

[0135] (3) By using the enhanced uplink wake-up signal, the base station reports the physical layer context (such as transmission power, transmission frequency, etc.) on the UE side, providing the necessary information for the base station to make dynamic decisions.

[0136] (4) The original wake-up signal only contains Part A. If a data block is added to the wake-up signal, the traditional design requires an additional DMPS to be inserted into the data block, which will consume a lot of overhead. However, this application saves DMRS overhead by reusing Part A as the DMRS of Part B, so that all REs can be used to carry data. Moreover, due to the saving of DMRS overhead, Part B can achieve an extremely low code rate of R=0.109 (1 / 9), ensuring that Part B can be demodulated with high reliability even at the cell edge.

[0137] The process of determining the bit rate is as follows: 13 bits (information) are combined with 8 bits...

[0138] (5) A clear, low-latency signaling flow is defined, which reuses the random access flow. For example, the enhanced uplink wake-up signal sent by the UE is part of Msg1, and the base station adds a 2-bit feedback in the RAR (Msg2) to provide a listening mode for dynamic decision-making.

[0139] It should be noted that although the embodiments of this application take on-demand SIB1 acquisition in idle state as the starting point, its core lies in the "enhanced uplink wake-up signal composite channel structure that uses ZC sequence multiplexing as demodulation reference signal" and the "closed-loop control mechanism that predicts downlink beam status in real time based on the characteristics of the enhanced uplink wake-up signal." This mechanism has strong versatility. This means that the technical solution can be migrated and widely applied to any communication scenario in 5G New Radio (NR) and its subsequent evolution systems (such as 5G-Advanced, 6G) that has an urgent need for "low-latency uplink small packet transmission," "fast link recovery," or "differentiated random access." The following will elaborate on the main application scenarios of this application other than SIB1 acquisition and its technical advantages.

[0140] Scenario 1: Optimization of large-scale IoT small data transmission (SDT) in RRC_INACTIVE state

[0141] In 5G large-scale machine-type communications and industrial IoT applications, a massive number of terminal devices (such as smart water meters, industrial sensors, and wearable devices) are in an RRC_INACTIVE (inactive) state for extended periods. Their service characteristics include extremely small data packets (typically only tens of bytes), sparse transmission frequency, but extreme sensitivity to battery life. In current 3GPP Rel-17SDT mechanisms (such as Random Access Small Data Transmission (RA-SDT) or Configuration Authorization-Based Small Data Transmission (CG-SDT), even when transmitting extremely small data packets, terminal devices typically need to execute cumbersome signaling procedures and often require additional protocol header overhead (such as Cell Radio Network Temporary Identifier (C-RNTI) and MAC headers) beyond the payload, resulting in low spectrum efficiency.

[0142] The E-ULWUS technology proposed in this application provides a solution for this scenario. Specifically, the terminal device can directly utilize the proposed "composite channel" for "one-step" data transmission: while sending the PRACH preamble (Part A) for uplink synchronization, the terminal device directly carries encrypted user application layer data or compressed buffer status reports (BSRs) in the adjacent accompanying data block (Part B). Because this application employs the key technology of "ZC sequence multiplexing into DMRS," the Part B data section does not need to carry additional pilot overhead, thus enabling the transmission of these tens of bits of core data at an extremely low code rate and with extremely high reliability. Simultaneously, the base station detects the preamble and completes uplink synchronization, and directly demodulates the accompanying data block using the channel estimation result of the preamble, without needing to transition the terminal device state to the RRC_CONNECTED state or allocate a dedicated data radio bearer (DRB). This mechanism simplifies the traditional multi-step handshake process to a "single transmission," significantly reducing the air interface signaling power consumption of IoT terminals, extending device battery life, and greatly improving the system's capacity to support massive connections.

[0143] Scenario 2: Ultra-fast Beam Failure Recovery (BFR) Scenario for 5G Millimeter Wave (FR2) Band

[0144] In 5G FR2 (millimeter wave) band communication, due to the extremely short wavelength and poor signal diffraction capability, it is highly susceptible to link interruption caused by dynamic obstruction from people, vehicles, or buildings, i.e., "beam failure." While current beam failure recovery mechanisms allow terminal devices to rebuild the link by sending a dedicated Beam Failure Recovery Request (BFRQ), this process typically involves two steps: first, the terminal device sends a preamble to notify the base station that the connection has dropped; after the base station responds, the terminal device then reports in a subsequent message which new available beam has been discovered. This multi-step interaction often leads to dropped calls in scenarios involving high-speed movement or drastic environmental changes.

[0145] The E-UL WUS scheme proposed in this application addresses this pain point, achieving "millisecond-level" link self-healing. When a terminal device detects a serving beam failure, it can immediately scan for surrounding candidate beams. Once a candidate beam that meets the quality requirements is found, the terminal device can transmit an E-UL WUS signal on the RACH resource of that beam. Part A (ZC sequence) is used to notify the base station of the failure, while Part B (data section) carries the best candidate beam index (New Beam Index) and its reference signal receiving power (RSRP) measured by the terminal device. This means that the base station, upon receiving the recovery request for the first moment (Msg1 phase), not only knows that "the terminal device has a problem," but also knows "which new beam should be switched to." The base station can then directly use the new beam information reported by the terminal device in the Msg2 (Random Access Response) to perform downlink beamforming and instruct the terminal device to complete the beam switching. This "recovery request with information" mechanism eliminates the ambiguous stages in the traditional BFR process, significantly shortens beam interruption time, and is crucial for ensuring the continuity of high-bandwidth services such as VR / AR.

[0146] Scenario 3: Service-Aware RandomAccess Scenario for Vertical Industries

[0147] With the deepening of 5G vertical industry applications, the network simultaneously contains ultra-reliable and low-latency communication (URLLC) services that are extremely sensitive to latency, enhanced mobile broadband (eMBB) services that have extremely high bandwidth requirements, and ordinary best-effort services. In the traditional random access mechanism, when the base station receives the Msg1 (preamble), it cannot distinguish the service intent behind the terminal device and can only adopt a "one-size-fits-all" scheduling strategy. This often leads to unnecessary queuing delays for URLLC services during the access phase, or the eMBB service receiving too small a Msg3 grant, requiring multiple fragment transmissions.

[0148] By utilizing the E-UL WUS technology proposed in this application, a "service-aware" intelligent access layer can be constructed. During the Msg1 phase of initiating random access, the terminal carries "service fingerprint" information through the Part B data section of E-ULWUS, such as a short hash value of the "Establishment Cause," "Network Slice Auxiliary Information (NSSAI)," or a clear "high-priority / urgent service indication." After decoding this contextual information, the base station can execute differentiated scheduling strategies in the subsequent Msg2 (RAR): for identified URLLC terminal devices, the base station can provide the highest priority access response and reserve extremely low bit rate time-frequency resources in the Msg3 authorization to ensure successful transmission in one go; for eMBB terminal devices, the base station can allocate a larger uplink bandwidth at once to avoid fragmented transmission. This mechanism breaks the "blindness" of traditional random access, extending the end-to-end guarantee capability of 5G network slicing to the lowest physical random access phase.

[0149] Scenario 4: Adaptive Doppler Frequency Shift Compensation and Link Management for High-Speed ​​Railway and Vehicle-Mounted Communication

[0150] The algorithm logic proposed in this application for "predicting downlink Doppler spread based on uplink signal frequency deviation" has independent patent value in high-speed mobile scenarios such as high-speed rail (HST) or vehicle-to-everything (V2X). In these scenarios, the terminal device moves at extremely high speeds relative to the base station (e.g., 350 km / h or even 500 km / h), and the resulting Doppler frequency shift leads to severe inter-carrier interference (ICI), greatly affecting demodulation performance. Traditional base station algorithms typically rely on long-period channel measurements after connection establishment to estimate the Doppler frequency shift, which often cannot converge in time during the initial terminal access phase, resulting in a low access success rate.

[0151] Using the mechanism described in this application, the terminal device explicitly reports its "nominal transmission frequency" or "frequency pre-correction value" in the access request (E-UL WUS). The base station, combining this with the actual frequency of the received signal, can calculate the current instantaneous Doppler frequency shift value in real time and with high accuracy. Based on this prediction, the base station can immediately take two key measures: First, it performs Doppler pre-compensation for the specific terminal in the downlink (such as SIB1 or RAR transmission) to offset the frequency shift effect; second, it dynamically adjusts the demodulation reference signal (DMRS) density of the terminal. For example, for terminals determined to be moving at high speed, the base station automatically increases the number of symbols in the time-domain DMRS in subsequent scheduling to track fast-fading channels, while reducing the DMRS for stationary terminals to save overhead. This "real-time speed awareness and link adaptation" mechanism based on Msg1 physical layer measurements is a key technological enhancement to ensure the stability of future 5G full coverage of high-speed rail and V2N communication for autonomous driving.

[0152] It should be understood that Figures 1 to 8 The flowcharts or scene diagrams shown are for illustrative purposes only and are not intended to limit the embodiments of this application to the examples illustrated. In fact, those skilled in the art can interpret the embodiments based on... Figures 1 to 8 The examples in the document can be transformed into equivalent ways to obtain more implementations.

[0153] The above text combined Figures 1 to 8 This document describes in detail the communication method provided in the embodiments of this application. The following will combine... Figures 9 to 10 The device embodiments of this application are described in detail below. It should be understood that the communication device of this application embodiment can execute the various communication methods of the foregoing embodiments of this application, that is, the specific working processes of the various products below can be referred to the corresponding processes in the foregoing method embodiments.

[0154] In the embodiments described above, the terminal device may execute some or all of the steps in each embodiment; the network device may execute some or all of the steps in each embodiment. These steps or operations are merely examples, and the embodiments of this application may also perform other operations or variations thereof. Furthermore, the steps may be executed in different orders as presented in the embodiments, and it is not necessary to execute all the operations in the embodiments of this application. Moreover, the sequence number of each step does not imply the order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0155] Figure 9 This is a schematic block diagram of a communication device provided in an embodiment of this application. Figure 9As shown, the communication device 900 may include a communication module 920. The communication module 920 can implement corresponding communication functions, which can be internal communication functions of the communication device 900 or communication functions between the communication device 900 and other devices. Optionally, the communication module 920 may also be referred to as a communication interface or transceiver module. Optionally, the communication device 900 further includes a processing module 910. The processing module 910 can implement corresponding processing functions.

[0156] Optionally, the communication device 900 further includes a storage module, which can be used to store instructions and / or data; the processing module 910 can read the instructions and / or data in the storage module so that the communication device 900 can implement the aforementioned method embodiments.

[0157] In one possible design, the communication device 900 may correspond to the terminal device in the above method embodiments, or to a component (such as a circuit, chip, or chip system) configured in the terminal device. The communication device 900 can be used to execute the steps or processes performed by the terminal device in any of the above method embodiments.

[0158] For example, the communication module 920 is used to send a first message to a network device. The first message includes first information and second information. The first information is used to wake up the network device, and the second information is used to indicate the transmission parameters used by the terminal device to send the first message.

[0159] The communication module 920 is also configured to receive a second message sent by the network device, the second message indicating a listening mode for a first beam set, the listening mode being determined by the network device based on the second information, wherein the beams in the first beam set are used to transmit synchronization signals to the terminal device;

[0160] The processing module 910 is used to determine at least one beam for monitoring from the first beam set based on the monitoring mode.

[0161] In some implementations, the processing module 910 is specifically configured to: if the monitoring mode is a first monitoring mode, determine the first beam in the first beam set associated with the first message as the beam to be monitored, and the first monitoring mode indicates that only the first beam is monitored; if the monitoring mode is a second monitoring mode, determine the first beam and the second beam in the first beam set adjacent to the first beam as the beams to be monitored, and the second monitoring mode indicates that the first beam and the second beam are monitored; if the monitoring mode is a third monitoring mode, determine the first beam, the second beam, and the third beam in the first beam set adjacent to the second beam as the beams to be monitored, and the third monitoring mode indicates that the first beam, the second beam, and the third beam are monitored; if the monitoring mode is a fourth monitoring mode, determine all beams in the first beam set as the beams to be monitored, and the fourth monitoring mode indicates that all beams in the first beam set are monitored.

[0162] In some implementations, the first information includes a random access preamble, and the second information includes the transmission power and transmission frequency used by the terminal device to send the first message.

[0163] In some implementations, the second information is modulated information, and the first information is used to demodulate the second information.

[0164] In some implementations, the second information also includes the monitoring mode currently used by the terminal device. If the monitoring mode determined by the network device is different from the monitoring mode currently used by the terminal device, the second message includes indication information, which is used to indicate the monitoring mode determined by the network device.

[0165] In some embodiments, the communication module 920 is further configured to listen for a third message sent by the network device on the at least one beam, the third message being used to instruct the terminal device to access the network device.

[0166] The above are merely examples; for detailed steps or procedures, please refer to the descriptions in the foregoing embodiments.

[0167] In one possible design, the communication device 900 may correspond to the network device in the above method embodiments, or to a component (such as a circuit, chip, or chip system) configured in the network device. The communication device 900 can be used to perform the steps or processes performed by the network device in any of the above method embodiments.

[0168] For example, the communication module 920 is used to receive a first message sent by a terminal device. The first message includes first information and second information. The first information is used to wake up the network device, and the second information is used to indicate the transmission parameters used by the terminal device when sending the first message.

[0169] Processing module 910 is used to determine a listening mode based on the second information. The listening mode is used to guide the terminal device in a strategy of listening to the first beam set, where the beams in the first beam set are used to transmit synchronization signals to the terminal device.

[0170] The communication module 920 is also used to send a second message to the terminal device, the second message indicating the listening mode.

[0171] In some implementations, the processing module 910 is specifically used to obtain, based on the second information, a transmission power and a transmission frequency, wherein the transmission power refers to the power used by the terminal device to transmit the first message, and the transmission frequency refers to the frequency used by the terminal device to transmit the first message; determine the signal-to-noise ratio based on the transmission power; determine the Doppler spread based on the transmission frequency; and determine the monitoring mode based on the signal-to-noise ratio and the Doppler spread.

[0172] In some implementations, the processing module 910 is specifically used to obtain the receiving power corresponding to receiving the first message; and to determine the ratio of the transmitting power to the power difference as the signal-to-noise ratio, wherein the power difference is the difference between the receiving power and the transmitting power.

[0173] In some implementations, the processing module 910 is specifically used to obtain the receiving frequency corresponding to the receipt of the first message; and to determine the Doppler spread based on the receiving frequency and the transmitting frequency.

[0174] In some implementations, the processing module 910 is specifically configured to: determine a first monitoring mode if the signal-to-noise ratio (SNR) is greater than or equal to a first threshold and the Doppler spread is less than a second threshold, wherein the first monitoring mode indicates that only the first beam associated with the first message is monitored, and the first beam set includes the first beam; determine a second monitoring mode if the SNR is less than the first threshold and the Doppler spread is less than the second threshold, wherein the second monitoring mode indicates that the first beam and a second beam adjacent to the first beam are monitored, and the first beam set includes the second beam; determine a third monitoring mode if the SNR is greater than or equal to the first threshold and the Doppler spread is greater than or equal to the second threshold, wherein the third monitoring mode indicates that the first beam, the second beam, and a third beam adjacent to the second beam are monitored, and the first beam set includes the third beam; and determine a fourth monitoring mode if the SNR is less than the first threshold and the Doppler spread is greater than or equal to the second threshold, wherein the fourth monitoring mode indicates that all beams are monitored.

[0175] In some embodiments, the second information is modulated information, and the processing module 910 is specifically used to demodulate the second information using the first information to obtain the transmission power and transmission frequency.

[0176] In some implementations, the processing module 910 is specifically used to perform uplink channel estimation based on the first information to obtain an estimation result; and to demodulate the second information using the estimation result to obtain the transmission power and transmission frequency.

[0177] In some implementations, the second information also includes the monitoring mode currently used by the terminal device. After determining the monitoring mode based on the second information and before sending the second message to the terminal device, the processing module 910 is further configured to add indication information to the second message if the monitoring mode determined by the network device is different from the monitoring mode currently used by the terminal device. The indication information indicates the monitoring mode determined by the network device.

[0178] In some embodiments, the communication module 920 is further configured to send a third message using at least one beam corresponding to the listening mode, the third message being used to instruct the terminal device to access the network device, wherein the first beam set includes the at least one beam.

[0179] The above are merely examples; for detailed steps or procedures, please refer to the descriptions in the foregoing embodiments.

[0180] Figure 10This is another schematic block diagram of the communication device 1000 provided in the embodiments of this application. The communication device 1000 may be a chip, chip system, or processor, etc., used by a terminal device or network device to implement the above-described methods. The communication device 1000 can be used to implement the methods described in the above-described method embodiments; for details, please refer to the descriptions in the above-described method embodiments.

[0181] like Figure 10 As shown, the communication device 1000 may include one or more processors 1010, which may also be referred to as processing units or processing modules, and can implement certain control functions. The processor 1010 may be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, while the central processing unit can be used to control the communication device 1000 (e.g., a base station, baseband chip, user, user chip), execute software programs, and process data from the software programs.

[0182] In an alternative design, the processor 1010 may also store instructions and / or data that can be executed by the processor 1010 to cause the communication device 1000 to perform the methods described in the above method embodiments.

[0183] In another alternative design, the communication device 1000 may include a communication interface 1020 for implementing receiving and transmitting functions. For example, the communication interface 1020 may be a transceiver circuit, interface, interface circuit, or transceiver. The transceiver circuit, interface, interface circuit, or transceiver for implementing receiving and transmitting functions may be separate or integrated. The aforementioned transceiver circuit, interface, interface circuit, or transceiver may be used for reading and writing code / data, or it may be used for transmitting or relaying signals.

[0184] Optionally, the communication device 1000 may include one or more memories 1030, which may store instructions that can be executed on the processor 1010, causing the communication device 1000 to perform the methods described in the above method embodiments. Optionally, the memories 1030 may also store data. Optionally, the processor 1010 may also store instructions and / or data. The processor 1010 and the memories 1030 may be provided separately or integrated together.

[0185] It should be understood that, in one possible design, the steps in the method embodiments provided in this application can be implemented by integrated logic circuits in the processor's hardware or by instructions in software form. The steps of the methods disclosed in the embodiments of this application can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, detailed descriptions are not provided here.

[0186] In one implementation, the communication device 1000 may correspond to the terminal device in the above method embodiments and may be used to execute the various steps and / or processes executed by the terminal device in the above method embodiments. The processor 1010 may be used to execute instructions stored in the memory 1030, and when the processor 1010 executes the instructions stored in the memory, the processor 1010 is used to execute the various steps and / or processes of the above method embodiments corresponding to the terminal device.

[0187] In another implementation, the communication device 1000 may correspond to the network device in the above method embodiments and may be used to execute the various steps and / or processes executed by the network device in the above method embodiments. The processor 1010 may be used to execute instructions stored in the memory 1030, and when the processor 1010 executes the instructions stored in the memory, the processor 1010 is used to execute the various steps and / or processes of the above method embodiments corresponding to the network device.

[0188] It should be understood that the aforementioned processing device can be one or more chips. For example, the processing device can be a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a system-on-chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0189] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0190] According to the method provided in the embodiments of this application, this application also provides a chip system, which includes one or more processors for calling and executing instructions stored in memory, thereby causing the method described in the embodiments of this application to be executed. The chip system may be composed of chips or may include chips and other discrete devices.

[0191] The chip system may include input circuits or interfaces for transmitting information or data, and output circuits or interfaces for receiving information or data.

[0192] According to the method provided in the embodiments of this application, this application also provides a communication system, which includes the aforementioned network device and terminal device.

[0193] According to the method provided in the embodiments of this application, this application also provides a computer program product, which includes: computer program code, which, when run on a computer, causes the computer to execute the various steps or processes executed by the network device or terminal device in any of the foregoing method embodiments.

[0194] According to the method provided in the embodiments of this application, this application also provides a computer-readable storage medium storing program code, which, when run on a computer, causes the computer to execute the various steps or processes executed by the network device or terminal device in any of the foregoing method embodiments.

[0195] The computer-readable storage medium may be the aforementioned volatile memory or non-volatile memory, or it may include both volatile memory and non-volatile memory.

[0196] In the embodiments of this application, the terms and English abbreviations are exemplary examples given for ease of description and should not be construed as limiting the application in any way. This application does not preclude the possibility of defining other terms that can achieve the same or similar functions in existing or future agreements.

[0197] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When these computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated.

[0198] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0199] It should be understood that in the various embodiments of this application, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0200] In summary, the above description is merely a preferred embodiment of the technical solution of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A communication method, characterized in that, The method includes: The terminal device sends a first message to the network device. The first message includes first information and second information. The first information is used to wake up the network device. The second information is used to indicate the transmission parameters used by the terminal device to send the first message. The second information includes the transmission power and / or transmission frequency used by the terminal device to send the first message. The terminal device receives a second message sent by the network device, the second message indicating a listening mode for a first beam set, the listening mode being determined by the network device based on the transmission power and / or transmission frequency, the beams in the first beam set being used to transmit synchronization signals to the terminal device; The terminal device determines at least one beam for monitoring from the first beam set based on the monitoring mode.

2. The method according to claim 1, characterized in that, The terminal device determines at least one beam for monitoring from the first beam set based on a monitoring mode, including: If the monitoring mode is the first monitoring mode, the terminal device determines the first beam in the first beam set associated with the first message as the beam to be monitored, and the first monitoring mode indicates that only the first beam is monitored. If the monitoring mode is the second monitoring mode, the terminal device determines the first beam and the second beam in the first beam set that is adjacent to the first beam as the beams to be monitored, and the second monitoring mode indicates that the first beam and the second beam are monitored. If the monitoring mode is the third monitoring mode, the terminal device determines the first beam, the second beam, and the third beam adjacent to the second beam in the first beam set as the beams for monitoring. The third monitoring mode indicates monitoring the first beam, the second beam, and the third beam. If the monitoring mode is the fourth monitoring mode, the terminal device determines all beams in the first beam set as beams for monitoring, and the fourth monitoring mode indicates monitoring all beams in the first beam set.

3. The method according to claim 1, characterized in that, The first information includes a random access preamble.

4. The method according to claim 3, characterized in that, The second information is modulated information, and the first information is used to demodulate the second information.

5. The method according to claim 3 or 4, characterized in that, The second information also includes the monitoring mode currently used by the terminal device. If the monitoring mode determined by the network device is different from the monitoring mode currently used by the terminal device, the second message includes indication information, which is used to indicate the monitoring mode determined by the network device.

6. The method according to claim 1, characterized in that, The method further includes: The terminal device listens for a third message sent by the network device on the at least one beam. The third message is used to guide the terminal device to access the network device.

7. A communication method, characterized in that, The method includes: A network device receives a first message sent by a terminal device. The first message includes first information and second information. The first information is used to wake up the network device. The second information is used to indicate the transmission parameters used by the terminal device when sending the first message. The second information includes the transmission power and / or transmission frequency used by the terminal device to send the first message. The network device determines a listening mode based on the transmission power and / or the transmission frequency. The listening mode is used to guide the terminal device in its strategy of listening to a first beam set, where the beams in the first beam set are used to transmit synchronization signals to the terminal device. The network device sends a second message to the terminal device, the second message indicating the listening mode.

8. The method according to claim 7, characterized in that, The network device determines the monitoring mode based on the transmission power and / or the transmission frequency, including: The network device determines the signal-to-noise ratio based on the transmission power; The network device determines the Doppler spread based on the transmission frequency; The network device determines the monitoring mode based on the signal-to-noise ratio and the Doppler spread.

9. The method according to claim 8, characterized in that, The network device determines the signal-to-noise ratio based on the transmission power, including: The network device obtains the receiving power corresponding to the receipt of the first message; The network device determines the signal-to-noise ratio as the ratio of the transmitted power to the power difference, where the power difference is the difference between the received power and the transmitted power.

10. The method according to claim 8, characterized in that, The network device determines the Doppler spread based on the transmission frequency, including: The network device obtains the receiving frequency corresponding to the receipt of the first message; The network device determines the Doppler spread based on the receiving frequency and the transmitting frequency.

11. The method according to any one of claims 8-10, characterized in that, The network device determines the monitoring mode based on the signal-to-noise ratio and the Doppler spread, including: If the signal-to-noise ratio is greater than or equal to a first threshold and the Doppler spread is less than a second threshold, the network device determines the monitoring mode as a first monitoring mode. The first monitoring mode indicates that only the first beam associated with the first message is monitored, and the first beam set includes the first beam. If the signal-to-noise ratio is less than the first threshold and the Doppler spread is less than the second threshold, the network device determines the monitoring mode as the second monitoring mode. The second monitoring mode indicates monitoring the first beam and the second beam adjacent to the first beam. The first beam set includes the second beam. If the signal-to-noise ratio is greater than or equal to the first threshold and the Doppler spread is greater than or equal to the second threshold, the network device determines the monitoring mode as a third monitoring mode. The third monitoring mode indicates monitoring the first beam, the second beam, and the third beam adjacent to the second beam. The first beam set includes the third beam. If the signal-to-noise ratio is less than the first threshold and the Doppler spread is greater than or equal to the second threshold, the network device determines the monitoring mode as the fourth monitoring mode, which indicates monitoring the full beam.

12. The method according to claim 8, characterized in that, The second information is modulated information, and the method further includes: The network device uses the first information to demodulate the second information to obtain the transmission power and / or the transmission frequency.

13. The method according to claim 12, characterized in that, The network device uses the first information to demodulate the second information to obtain the transmission power and / or the transmission frequency, including: The network device performs uplink channel estimation based on the first information to obtain the estimation result; The network device uses the estimation result to demodulate the second information to obtain the transmission power and / or the transmission frequency.

14. The method according to claim 8, characterized in that, The second information also includes the listening mode currently used by the terminal device. After the network device determines the listening mode based on the second information and before the network device sends the second message to the terminal device, the method further includes: If the monitoring mode determined by the network device is different from the monitoring mode currently used by the terminal device, the network device adds indication information to the second message, the indication information indicating the monitoring mode determined by the network device.

15. The method according to claim 7, characterized in that, The method further includes: The network device sends a third message using at least one beam corresponding to the listening mode. The third message is used to guide the terminal device to access the network device, and the first beam set includes the at least one beam.

16. A communication device, characterized in that, The device includes at least one processor coupled to a memory storing a program or instructions, the processor executing the program or instructions to cause the device to perform the method as described in any one of claims 1 to 15.

17. A communication system, characterized in that, Includes the communication device as described in claim 16.

18. A chip system, characterized in that, The chip system includes one or more processors, which are configured to retrieve and execute instructions stored in memory, such that the method as described in any one of claims 1 to 15 is performed.

19. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instructions are executed, they cause the computer to perform the method as described in any one of claims 1 to 15.

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