Communication method and apparatus

Abstract

A communication method and apparatus, relating to the field of communications. In the method, an uplink wake-up signal is sent, the uplink wake-up signal being used to wake up a first cell, the uplink wake-up signal carrying first indication information, and the first indication information indicating an expected period of a synchronization broadcast block of a first cell and / or beam of a synchronization broadcast block; and a synchronization broadcast block and / or a system information block of the first cell is monitored. Using the described method, the first cell can be awakened, and the requirements of a terminal device can be better met.

Description

Communication method and device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on September 28, 2023, with application number 202311284560.X and invention name "A Communication Method and Device", the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of communication technology, and in particular to a communication method and device. Background Art

[0004] As fifth-generation (5G) mobile communication technology becomes increasingly widespread across industries and geographic regions, 5G technology is increasingly required to handle more advanced services and applications. At the same time, 5G networks are becoming denser, utilizing more antennas, greater bandwidth, and more frequency bands. In this environment, improving network energy efficiency in 5G systems has become a major research topic in the industry.

[0005] Currently, the majority of energy consumption in 5G systems comes from the radio access network, particularly the active antenna units. Current wireless access equipment power consumption can be divided into two components: dynamic power consumption and static power consumption. Dynamic power consumption occurs only when data is being transmitted or received, while static power consumption occurs continuously even when data is not being transmitted or received. Therefore, it is essential to introduce technologies that reduce static power consumption without compromising user performance.

[0006] Currently, terminal devices can send uplink wake-up signals to wake up the base station, but the design of uplink wake-up signals and related mechanisms require further discussion.

[0007] Summary of the Invention

[0008] The present application provides a communication method and apparatus for flexibly waking up a base station to meet the needs of terminal equipment.

[0009] In a first aspect, the present application provides a communication method, which can be performed by a terminal device or a module (such as a chip) in the terminal device. The method includes: sending an uplink wake-up signal, the uplink wake-up signal is used to wake up a first cell, the uplink wake-up signal carries first indication information, the first indication information indicates a desired period of a synchronization broadcast block and / or a beam of the synchronization broadcast block of the first cell; and monitoring the synchronization broadcast block and / or system information block of the first cell.

[0010] By adopting the above method, the terminal device sends an uplink wake-up signal to wake up the first cell, and the uplink wake-up signal includes first indication information, which indicates the period and / or beam of the synchronous broadcast expected by the terminal device through the first indication information, thereby notifying the network device of the period and / or beam of the synchronous broadcast expected by the terminal device, so that the synchronous broadcast block broadcast by the network device can better meet the needs of the terminal device.

[0011] In one possible design, the uplink wake-up signal also carries second indication information, and the second indication information is used to indicate at least one of the following: the second cell to be awakened, whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold, whether the path loss of the terminal device is greater than or equal to the path loss threshold, or whether the terminal device is a reduced-capability device.

[0012] In one possible design, when sending an uplink wake-up signal, the uplink wake-up signal is sent according to configuration information of the uplink wake-up signal.

[0013] In one possible design, the configuration information of the uplink wake-up signal includes at least one of the following: waveform information of the uplink wake-up signal, the number of bits carried by a symbol occupied by the uplink wake-up signal, time domain resource information of the uplink wake-up signal, frequency domain resource information of the uplink wake-up signal, the maximum number of transmissions of the uplink wake-up signal, the power climbing step of the uplink wake-up signal, the cache threshold, or the path loss threshold.

[0014] In one possible design, the waveform information of the uplink wake-up signal indicates that the waveform of the uplink wake-up signal is any one of the following: a coordinated waveform of on-off keying OOK and orthogonal frequency division multiplexing OFDM, the multi-carrier amplitude shift keying ASK, multi-carrier frequency shift keying FSK, or OFDM.

[0015] In one possible design, the configuration information of the uplink wake-up signal also includes first information, and the first information includes at least one of the following information: access identifier, network slice group identifier, network slice identifier, emergency service identifier, data radio bearer identifier, and logical channel identifier; the first information is used by the terminal device to determine whether to send the uplink wake-up signal.

[0016] With the above design, the terminal device determines whether to send an uplink wake-up signal based on the first information. When the terminal device meets any one or more information included in the first information, the terminal device sends an uplink wake-up signal.

[0017] In one possible design, the configuration information of the uplink wake-up signal is carried by one of the following: a broadcast message, a downlink low-power synchronization signal, a downlink wake-up signal, or a radio resource control RRC signaling.

[0018] In one possible design, after sending the uplink wake-up signal, the random access request message is sent to the first cell based on the monitored synchronization broadcast block and / or system information block of the first cell.

[0019] In one possible design, after sending an uplink wake-up signal, a first condition is met and the random access request message is sent to the first cell; wherein the first condition includes determining that the maximum number of times the uplink wake-up signal is sent is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored; and / or, starting the timing from the first time the uplink wake-up signal is sent, determining that a first preset time length is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored.

[0020] With the above design, after the terminal device sends an uplink wake-up signal, if the first condition is met, the terminal device can directly send a random access request message to the first cell to wake up the first cell.

[0021] In one possible design, after sending an uplink wake-up signal, a first condition is met and the random access request message is sent to the second cell; wherein the first condition includes determining that the maximum number of times the uplink wake-up signal is sent is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored; and / or, starting the timing from the first time the uplink wake-up signal is sent, determining that a first preset time length is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored; after the random access process is completed, the identifier of the first cell is sent to the second cell.

[0022] With the above design, after the terminal device sends an uplink wake-up signal, if the first condition is met, the terminal device can send a random access request message to the second cell to wake up the first cell through the second cell.

[0023] In one possible design, the second cell is a cell reselected by the terminal device or a designated cell.

[0024] In one possible design, third indication information is received from the first cell or the third cell, and the third indication information indicates at least one of the following: time-frequency resource information occupied by the random access request message, the root sequence index of the random access request message, the random access sequence index, or the beam association configuration of the downlink low-power synchronization signal and the random access sequence.

[0025] In one possible design, after sending an uplink wake-up signal, a random access response message is received from the first cell based on the monitored synchronization broadcast block and / or system information block of the first cell, and the random access response message includes information of the uplink wake-up signal.

[0026] With the above design, the terminal device does not need to send a random access request message. The terminal device only sends an uplink wake-up signal. The uplink wake-up signal can achieve the role of the random access request message, thereby reducing the delay of the terminal device accessing the network.

[0027] In one possible design, the information of the uplink wake-up signal includes all or part of the information carried in the uplink wake-up signal sent by the terminal device, or the sequence index of the uplink wake-up signal.

[0028] In a second aspect, the present application provides a communication method, which can be performed by a network device or a module (such as a chip) in the network device. The method includes: receiving an uplink wake-up signal, the uplink wake-up signal is used to wake up a first cell, the uplink wake-up signal carries first indication information, the first indication information indicates a desired period of a synchronization broadcast block and / or a beam of a synchronization broadcast block of the first cell; and broadcasting a synchronization broadcast block and / or a system information block of the first cell.

[0029] Using the above method, the network device receives an uplink wake-up signal and can broadcast a synchronization broadcast block and / or system information block of the first cell to wake up the first cell. The uplink wake-up signal includes first indication information, which indicates the period and / or beam of the synchronization broadcast desired by the terminal device. This allows the synchronization broadcast block broadcast by the network device to better meet the needs of the terminal device.

[0030] In one possible design, when receiving the uplink wake-up signal, the uplink wake-up signal is received by a secondary receiver.

[0031] In one possible design, before broadcasting the synchronization broadcast block according to the uplink wake-up signal, the period of the synchronization broadcast block and / or the index of the synchronization broadcast block are determined according to the first indication information.

[0032] In one possible design, the uplink wake-up signal also carries second indication information, and the second indication information is used to indicate at least one of the following: the second cell to be awakened, whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold, whether the path loss of the terminal device is greater than or equal to the path loss threshold, or whether the terminal device is a reduced-capability device.

[0033] In one possible design, configuration information of the uplink wake-up signal is sent before sending the uplink wake-up signal.

[0034] In one possible design, the configuration information of the uplink wake-up signal includes at least one of the following: waveform information of the uplink wake-up signal, the number of bits carried by a symbol occupied by the uplink wake-up signal, time domain resource information of the uplink wake-up signal, frequency domain resource information of the uplink wake-up signal, the maximum number of transmissions of the uplink wake-up signal, the power climbing step of the uplink wake-up signal, the cache threshold, or the path loss threshold.

[0035] In one possible design, the waveform information of the uplink wake-up signal indicates that the waveform of the uplink wake-up signal is any one of the following: a coordinated waveform that adapts to both OOK and OFDM, the multi-carrier ASK, multi-carrier FSK, or OFDM.

[0036] In one possible design, the configuration information of the uplink wake-up signal also includes first information, and the first information includes at least one of the following information: access identifier, network slice group identifier, network slice identifier, emergency service identifier, data radio bearer identifier, and logical channel identifier; the first information is used by the terminal device to determine whether to send the uplink wake-up signal.

[0037] In one possible design, the configuration information of the uplink wake-up signal is carried by one of the following: a broadcast message, a downlink low-power synchronization signal, a downlink wake-up signal, or a radio resource control RRC signaling.

[0038] In one possible design, after broadcasting the synchronization broadcast block and / or system information block of the first cell according to the uplink wake-up signal, a random access response message is sent to the terminal device, and the random access response message includes information of the uplink wake-up signal.

[0039] In one possible design, the information of the uplink wake-up signal includes all or part of the information carried in the uplink wake-up signal sent by the terminal device, or the sequence index of the uplink wake-up signal.

[0040] In a third aspect, the present application provides a communication device comprising a processing unit and a transceiver unit, wherein the processing unit calls the transceiver unit to execute sending an uplink wake-up signal, wherein the uplink wake-up signal is used to wake up a first cell, and the uplink wake-up signal carries first indication information, and the first indication information indicates the expected period of the synchronization broadcast block of the first cell and / or the beam of the synchronization broadcast block; monitors the synchronization broadcast block and / or system information block of the first cell.

[0041] In one possible design, the uplink wake-up signal also carries second indication information, and the second indication information is used to indicate at least one of the following: the second cell to be awakened, whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold, whether the path loss of the terminal device is greater than or equal to the path loss threshold, or whether the terminal device is a reduced-capability device.

[0042] In one possible design, the transceiver unit is used to send the uplink wake-up signal according to the configuration information of the uplink wake-up signal when sending the uplink wake-up signal.

[0043] In one possible design, the configuration information of the uplink wake-up signal includes at least one of the following: waveform information of the uplink wake-up signal, the number of bits carried by a symbol occupied by the uplink wake-up signal, time domain resource information of the uplink wake-up signal, frequency domain resource information of the uplink wake-up signal, the maximum number of transmissions of the uplink wake-up signal, the power climbing step of the uplink wake-up signal, the cache threshold, or the path loss threshold.

[0044] In one possible design, the waveform information of the uplink wake-up signal indicates that the waveform of the uplink wake-up signal is any one of the following: a coordinated waveform of OOK and OFDM, the multi-carrier amplitude shift keying ASK, the multi-carrier frequency shift keying FSK, or OFDM.

[0045] In one possible design, the configuration information of the uplink wake-up signal also includes first information, and the first information includes at least one of the following information: access identifier, network slice group identifier, network slice identifier, emergency service identifier, data radio bearer identifier, and logical channel identifier; the first information is used by the terminal device to determine whether to send the uplink wake-up signal.

[0046] In one possible design, the configuration information of the uplink wake-up signal is carried by one of the following: a broadcast message, a downlink low-power synchronization signal, a downlink wake-up signal, or a radio resource control RRC signaling.

[0047] In one possible design, the transceiver unit is configured to, after sending an uplink wake-up signal, send the random access request message to the first cell based on the monitored synchronization broadcast block and / or system information block of the first cell.

[0048] In one possible design, the transceiver unit is used to send the random access request message to the first cell after sending the uplink wake-up signal, determining that the first condition is met according to the processing unit; wherein the first condition includes determining that the maximum number of times the uplink wake-up signal is sent is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored; and / or, starting the timing from the first time the uplink wake-up signal is sent, determining that a first preset time length is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored.

[0049] In one possible design, the transceiver unit is used to send the random access request message to the second cell after sending the uplink wake-up signal, determining that the first condition is met according to the processing unit; wherein the first condition includes determining that the maximum number of times the uplink wake-up signal is sent is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored; and / or, starting the timing from the first time the uplink wake-up signal is sent, determining that the first preset time length is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored; after the random access process is completed, sending the identifier of the first cell to the second cell.

[0050] In one possible design, the second cell is a cell reselected by the terminal device or a designated cell.

[0051] In one possible design, the transceiver unit is used to receive third indication information from the first cell or the third cell, where the third indication information indicates at least one of the following: time-frequency resource information occupied by the random access request message, the root sequence index of the random access request message, the random access sequence index, or the beam association configuration of the downlink low-power synchronization signal and the random access sequence.

[0052] In one possible design, the transceiver unit is used to receive a random access response message from the first cell after sending an uplink wake-up signal based on the synchronization broadcast block and / or system information block of the first cell monitored, and the random access response message includes information about the uplink wake-up signal.

[0053] In one possible design, the information of the uplink wake-up signal includes all or part of the information carried in the uplink wake-up signal sent by the terminal device, or the sequence index of the uplink wake-up signal.

[0054] In a fourth aspect, the present application provides a communication device, which includes a processing unit and a transceiver unit, wherein the processing unit calls the transceiver unit to execute the reception of the uplink wake-up signal, the uplink wake-up signal is used to wake up the first cell, and the uplink wake-up signal carries first indication information, and the first indication information indicates the expected period of the synchronization broadcast block of the first cell and / or the beam of the synchronization broadcast block; broadcasts the synchronization broadcast block and / or system information block of the first cell.

[0055] In one possible design, the transceiver unit is configured to receive the uplink wake-up signal through an auxiliary receiver when receiving the uplink wake-up signal.

[0056] In one possible design, the processing unit is used to determine the period of the synchronization broadcast block and / or the index of the synchronization broadcast block according to the first indication information before broadcasting the synchronization broadcast block according to the uplink wake-up signal.

[0057] In one possible design, the uplink wake-up signal also carries second indication information, and the second indication information is used to indicate at least one of the following: the second cell to be awakened, whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold, whether the path loss of the terminal device is greater than or equal to the path loss threshold, or whether the terminal device is a reduced-capability device.

[0058] In one possible design, the transceiver unit is used to send configuration information of the uplink wake-up signal before sending the uplink wake-up signal.

[0059] In one possible design, the configuration information of the uplink wake-up signal includes at least one of the following: waveform information of the uplink wake-up signal, the number of bits carried by a symbol occupied by the uplink wake-up signal, time domain resource information of the uplink wake-up signal, frequency domain resource information of the uplink wake-up signal, the maximum number of transmissions of the uplink wake-up signal, the power climbing step of the uplink wake-up signal, the cache threshold, or the path loss threshold.

[0060] In one possible design, the waveform information of the uplink wake-up signal indicates that the waveform of the uplink wake-up signal is any one of the following: a coordinated waveform of OOK and OFDM, the multi-carrier ASK, multi-carrier FSK, or OFDM.

[0061] In one possible design, the configuration information of the uplink wake-up signal also includes first information, and the first information includes at least one of the following information: access identifier, network slice group identifier, network slice identifier, emergency service identifier, data radio bearer identifier, and logical channel identifier; the first information is used by the terminal device to determine whether to send the uplink wake-up signal.

[0062] In one possible design, the configuration information of the uplink wake-up signal is carried by one of the following: a broadcast message, a downlink low-power synchronization signal, a downlink wake-up signal, or a radio resource control RRC signaling.

[0063] In one possible design, the transceiver unit is used to send a random access response message to the terminal device after broadcasting the synchronization broadcast block and / or system information block of the first cell according to the uplink wake-up signal, and the random access response message includes information of the uplink wake-up signal.

[0064] In one possible design, the information of the uplink wake-up signal includes all or part of the information carried in the uplink wake-up signal sent by the terminal device, or the sequence index of the uplink wake-up signal.

[0065] In a fifth aspect, the present application provides a communication device, which may be a first device, or a module or unit (for example, a chip, or a chip system, or a circuit) in the first device that corresponds one-to-one to the method / operation / step / action described in the first or second aspect, or may be capable of being used in combination with the first device.

[0066] In a sixth aspect, the present application provides a communication device comprising at least one processing element and at least one storage element, wherein the at least one storage element is used to store programs and data, and the at least one processing element is used to read and execute the programs and data stored in the storage element, so that any method described in any one of the above aspects of the present application is implemented.

[0067] In a seventh aspect, the present application further provides a computer program, which, when executed on a computer, enables the computer to execute any of the methods described in any of the above aspects.

[0068] In an eighth aspect, the present application provides a communication device, comprising: an interface circuit; the interface circuit is used to provide input and / or output of programs or instructions to at least one processor; the at least one processor is used to execute the program or instructions so that the communication device can implement any of the methods described in any of the above aspects.

[0069] In one possible manner, the communication device includes the at least one memory, and the at least one memory is used to store the program or instruction.

[0070] In a ninth aspect, the present application provides a computer storage medium storing a software program. When the software program is read and executed by one or more processors, the software program can implement any of the methods described in any of the above aspects.

[0071] In a tenth aspect, the present application provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute any of the methods described in any of the above aspects.

[0072] In the eleventh aspect, the present application provides a chip system, which includes at least one chip and a memory, and the at least one chip is used to read and execute the program stored in the memory to implement any of the methods described in any of the above aspects.

[0073] In the twelfth aspect, the present application provides a communication system, which includes at least one terminal device and a network device, wherein the terminal executes any method described in the first aspect, and the network device executes any method described in the second aspect.

[0074] Based on the implementations provided in the above aspects, this application can also be further combined to provide more implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] FIG1 is a schematic diagram of the architecture of a mobile communication system used in an embodiment of the present application;

[0076] FIG2 is a schematic diagram of beam scanning in this application;

[0077] FIG3 is a schematic diagram of SSB transmission in this application;

[0078] FIG4 is a schematic diagram of Scheme 1 of the base station wake-up scheme in this application;

[0079] FIG5 is a schematic diagram of Scheme 2 of the base station wake-up scheme in this application;

[0080] FIG6 is a flowchart summarizing the communication method in this application;

[0081] FIG7A is a schematic diagram of a terminal device sending an uplink wake-up signal and a network device receiving an uplink wake-up signal in the present application;

[0082] FIG7B is a second schematic diagram of a terminal device sending an uplink wake-up signal and a network device receiving an uplink wake-up signal in the present application;

[0083] FIG8 is a flowchart of one of the interactions between the terminal device and the network device after sending an uplink wake-up signal in scenario 1 of the present application;

[0084] FIG9 is a second flowchart of the interaction between the terminal device and the network device after sending the uplink wake-up signal in scenario 1 of the present application;

[0085] FIG10 is a flowchart of one of the interactions between the terminal device and the network device after sending an uplink wake-up signal in scenario 2 of the present application;

[0086] FIG11 is a schematic diagram of a terminal device meeting the first condition in this application;

[0087] FIG12 is a second flowchart of the interaction between the terminal device and the network device after sending the uplink wake-up signal in scenario 2 of the present application;

[0088] FIG13 is a schematic diagram of the period of RACH opportunity and the period of UL-WUS opportunity in the present application;

[0089] FIG14 is a schematic structural diagram of a communication device in this application;

[0090] FIG15 is a schematic structural diagram of another communication device in this application. DETAILED DESCRIPTION

[0091] The embodiments of the present application can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), world-wide interoperability for microwave access (WIMAX) communication system, fifth generation (5G) system or new radio (NR), or applied to future communication systems or other similar communication systems.

[0092] Figure 1 is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application. As shown in Figure 1 , the communication system includes a radio access network 100 and a core network 200. Optionally, the communication system 1000 may also include the Internet 300. The radio access network 100 may include at least one radio access network device (such as 110a and 110b in Figure 1 ) and at least one terminal (such as 120a-120j in Figure 1 ). The terminal is wirelessly connected to the radio access network device, and the radio access network device is wirelessly or wiredly connected to the core network. The core network device and the radio access network device may be independent, distinct physical devices, or the core network device's functions and the radio access network device's logical functions may be integrated into the same physical device, or a single physical device may integrate some of the core network device's functions and some of the radio access network device's functions. Terminals and radio access network devices may be interconnected via wired or wireless connections. Figure 1 is merely a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in Figure 1 .

[0093] A radio access network device can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a fifth-generation (5G) mobile communication system, a next-generation base station in a sixth-generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a Wi-Fi system. It can also be a module or unit that performs some of the functions of a base station, such as a centralized unit (CU) or a distributed unit (DU). The CU performs the functions of the base station's radio resource control protocol and packet data convergence protocol (PDCP), as well as the service data adaptation protocol (SDAP). The DU performs the functions of the base station's radio link control layer and medium access control (MAC) layer, as well as some or all of the physical layer. For detailed descriptions of each of these protocol layers, please refer to the relevant technical specifications of the Third Generation Partnership Project (3GPP). The wireless access network device can be a macro base station (such as 110a in Figure 1), a micro base station or an indoor station (such as 110b in Figure 1), a relay node, a donor node, etc. The embodiments of this application do not limit the specific technology and device form used by the wireless access network device. For ease of description, the following description uses a network device as an example of a wireless access network device.

[0094] A terminal may also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. The terminal 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), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, etc. The terminal can be a mobile phone, tablet computer, computer with wireless transceiver function, wearable device, vehicle, drone, helicopter, airplane, ship, robot, robotic arm, smart home device, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal.

[0095] Network devices and terminals can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; on water; and on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of network devices and terminals.

[0096] The roles of network devices and terminals can be relative. For example, the helicopter or drone 120i in Figure 1 can be configured as a mobile network device. With respect to the terminal 120j accessing the wireless access network 100 via 120i, drone 120i is a network device. However, with respect to network device 110a, 120i is a terminal, meaning that communication between 110a and 120i occurs via a wireless air interface protocol. Of course, communication between 110a and 120i can also occur via an interface protocol between network devices. In this case, 120i is also a network device relative to 110a. Therefore, both network devices and terminals can be collectively referred to as communication devices. 110a and 110b in Figure 1 can be referred to as communication devices with network device functionality, while 120a-120j in Figure 1 can be referred to as communication devices with terminal functionality.

[0097] Communication between network devices and terminals, between network devices, and between terminals can be carried out through authorized spectrum, unauthorized spectrum, or both; communication can be carried out through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0098] In the embodiments of the present application, the functions of the network device may also be performed by a module (such as a chip) in the network device, or by a control subsystem that includes the network device functions. The control subsystem that includes the network device functions here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal may also be performed by a module (such as a chip or modem) in the terminal, or by a device that includes the terminal functions.

[0099] In the embodiments of the present application, the network device sends a downlink signal or downlink information to the terminal, and the downlink information is carried on the downlink channel; the terminal sends an uplink signal or uplink information to the base station, and the uplink information is carried on the uplink channel. In order to communicate with the base station, the terminal needs to establish a wireless connection with the cell controlled by the base station. The cell with which the terminal has established a wireless connection is called the serving cell of the terminal. When the terminal communicates with the serving cell, it will also be interfered with by signals from neighboring cells.

[0100] It can be understood that in the embodiments of the present application, the physical downlink shared channel (PDSCH), physical downlink control channel (PDCCH), physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) are only used as examples of downlink data channels, downlink control channels, uplink control channels and uplink data channels, respectively. In different systems and different scenarios, data channels and control channels may have different names, and the embodiments of the present application do not limit this.

[0101] The following is an explanation of the basic technical concepts involved in this application:

[0102] 1. Synchronous broadcast block (SS / PBCH block, SSB)

[0103] The synchronization broadcast block can also be called a synchronization signal block. For example, in the NR system, the SSB includes the primary synchronization signal (PSS), the secondary synchronization signal (SSS), the physical broadcast channel (PBCH), and the demodulation reference signal (DMRS) demodulated by the PBCH. The beam corresponding to the SSB is called the SSB beam. Each SSB can occupy 4 consecutive symbols in the time domain and 20 resource blocks (RBs) in the frequency domain.

[0104] The wireless design of the 5G air interface is based on beam management. Both uplink and downlink transmission and reception are beam-based. At a specific time, the base station transmits a narrow beam in a specific direction, then changes direction and transmits again at the next time, and so on, to achieve full coverage. This process is called beam scanning, as shown in Figure 2. Different SSB indices correspond to different beams or beam directions.

[0105] In the 5G air interface, the beam measurement reference signals used are shown in Table 1:

[0106] Table 1

[0107] The SSB transmission time is based on a half-frame (i.e., 5ms) as a unit and is sent according to a certain period. The SSB transmission period can be 5ms, 10ms, 20ms, 40ms, 80ms, and 160ms. NR defines multiple SSB formats. In a half-frame (5ms) of SSB transmission, the maximum number of SSB transmissions is related to the frequency. For example, if the frequency is less than or equal to 3GHz, the maximum number of SSB transmissions is 4. If the frequency is greater than 3GHz and less than or equal to 6GHz, the maximum number of SSB transmissions is 8. If the frequency is greater than 6GHz, the maximum number of SSB transmissions is 64. As shown in Figure 3, the maximum number of SSB transmissions is 4.

[0108] 2. Initial residency and random access process

[0109] First, the terminal device detects the synchronization broadcast block. Exemplarily, the terminal device can obtain cell synchronization and cell identification based on the PSS and / or SSS. Furthermore, the terminal receives the PBCH based on the detected PSS and / or SSS. Exemplarily, there is a resource mapping relationship between the PSS / SSS and the PBCH. The PBCH includes a master information block (MIB), which includes a system radio frame number, an initial control resource set (CORESET) #0 and a search space (SS) #0 of the public PDCCH, wherein CORESET #0 and SS #0 respectively indicate the frequency domain position and time domain position of the public downlink control information (DCI) of the receiving scheduling system information block 1 (SIB1).

[0110] Therefore, the terminal device can detect the public PDCCH or public DCI that schedules SIB1 based on SSB, and then obtain SIB1 to complete idle state residence.

[0111] SIB1 contains essential system information other than the MIB, also known as the remaining essential system information. This information primarily includes paging configuration, the number of SSB beams actually transmitted, and the period. Furthermore, SIB1 also carries random access (RACH) configuration information, which indicates configuration information such as the RACH time-frequency and preamble resources. Therefore, based on SIB1, the terminal device can select the RACH timing and preamble to send a random access request message.

[0112] 3. Main radio (MR) and low power radio (LR)

[0113] The main transceiver module is used to send or receive normal signals or channels.

[0114] A low power transceiver module (LR), also known as an auxiliary transceiver module, is a transceiver module for sending or receiving low power signals / channels, and the low power transceiver module has low power consumption. Optionally, the low power transceiver module includes a wake up signal receiver (WUR), which is a receiving module or receiver for receiving low power signals. Exemplarily, the low power transceiver module can be one of the following three low power receiver architectures: 1. An architecture with RF envelope detection function; 2. A heterodyne architecture with intermediate frequency envelope detection; 3. A co-frequency / zero intermediate frequency architecture with baseband envelope detection. Among them, the above receiver architecture is considered to be suitable for OOK modulation. Some architectures may be applicable to other modulations, such as FSK modulation.

[0115] 4. Reduced Capability Equipment

[0116] Reduced capability devices may also be referred to as RedCap devices. For example, reduced capability devices support a maximum channel bandwidth of 20 MHz in frequency range (FR) 1 and a maximum channel bandwidth of 100 MHz in FR2. The enhanced reduced capability device uses a baseband bandwidth of 5 MHz for PDSCH (unicast and broadcast) and PUSCH, and a radio frequency bandwidth of 20 MHz for uplink and downlink. Or the supported peak data rate target is 10 Mbps. Among them, FR1 and FR2 are two major categories of 5G frequency divisions, among which FR1 refers to the frequency band of 410 MHz to 7125 MHz, also known as medium and low frequency. FR2 refers to the frequency band of 24250 MHz to 52600 MHz, also known as high frequency, and is usually also called millimeter wave band.

[0117] 5. Community status

[0118] The state of a cell can also be called the mode of a cell. Generally, a cell can be in a normal working state. In order to save energy in the cell, the cell can also be in a dormant state. One case is a deep sleep state, where the cell can be completely shut down and does not send any downlink physical signals or channels. At this time, the terminal device cannot detect any signals sent by the cell. Another case is that the cell can be in a shallow sleep state or an energy-saving state, where the cell can send some downlink physical signals or channels, such as a long-period SSB (as shown in Figure 4) or a simplified SSB (as shown in Figure 5), which can enable the terminal device to detect this part of the downlink physical signal or channel.

[0119] The following describes several base station wake-up (or cell wake-up) schemes:

[0120] In solution 1, the base station can send a long-period SSB (e.g., 160ms) to enable the terminal device to maintain downlink time-frequency synchronization. When the terminal device needs to initiate an uplink service, or when the terminal device requests access, the terminal device can send an uplink wakeup signal (UL WUS) to the base station to wake up the base station. After the base station is awakened, the base station can send a short-period SSB (e.g., 20ms) and / or SIB1, as shown in Figure 4.

[0121] In solution 2, the base station only sends a simplified SSB. The simplified SSB may be different from the above-mentioned SSB. For example, the simplified SSB simplifies the information carried by the above-mentioned SSB, omitting some unnecessary information, or the simplified SSB carries necessary information. For example, the simplified SSB may have no PBCH, or the PSS / SSS may have a different sequence design. The terminal device may send an uplink wake-up signal to the base station to wake up the base station. After the base station is awakened, the base station may send a short-period SSB (e.g., 20ms) and / or SIB1, as shown in Figure 5.

[0122] It can be seen that the above-mentioned base station wake-up (or cell wake-up) solution does not disclose the specific design of the uplink wake-up signal, nor does it restrict the transmission mechanism of the uplink wake-up signal.

[0123] Based on the network system architecture shown in FIG1 and the contents of the above-mentioned related technical introduction, several possible communication methods are provided in the embodiments of the present application. The execution subjects of each communication method are introduced using network devices and terminals as examples. For example, the network device can be the access network device 110a or the access network device 110b in FIG1 . The terminal can be any of the terminals shown in FIG1 . In addition, it should be understood that the network device can also be replaced by a communication device with network device functions or a chip, unit or module inside a communication device with network device functions. The terminal can also be replaced by a communication device with terminal functions or a chip, unit or module inside a communication device with terminal functions.

[0124] FIG6 shows a possible flow diagram of a communication method provided in an embodiment of the present application. As shown in FIG6 , the method includes:

[0125] Step 600: The terminal device sends an uplink wake-up signal.

[0126] Exemplarily, the uplink wake-up signal is used to wake up the first cell. The uplink wake-up signal is used to wake up the first cell, which can also be described as the uplink wake-up signal is used to activate the first cell. The first cell may be a cell where the terminal device resides, and the state of the first cell may be a dormant state or an energy-saving state.

[0127] In one possible implementation, the uplink wake-up signal may carry first indication information, where the first indication information indicates a desired period of a synchronization broadcast block of the first cell and / or a beam of the synchronization broadcast block. In another possible implementation, the uplink wake-up signal may indicate or be mapped to the first indication information, for example, different uplink wake-up signal sequences may indicate a desired period of a synchronization broadcast block of the first cell and / or a beam of the synchronization broadcast block.

[0128] In one example, the first indication information includes a desired period of a synchronization broadcast block of the first cell, for example, 20 ms.

[0129] Alternatively, the first indication information is used to indicate whether the period of the expected synchronization broadcast block of the first cell is greater than or equal to the first period, where the first period can be a period specified by the protocol or a period indicated to the terminal device by the first cell or other cell.

[0130] Alternatively, the first indication information is used to indicate whether the period of the synchronization broadcast block of the desired first cell is less than the second period, and the second period may be the period of the long-period synchronization broadcast block, or the period of the simplified synchronization broadcast block, or the period of the downlink low-power synchronization signal, or the period specified in the protocol, or the period indicated to the terminal device by the first cell or other cell. For example, the second period may be the period of the long-period SSB in Figure 4, or the period of the simplified SSB in Figure 5, or the period of the synchronization broadcast block when the cell is in a dormant state or an energy-saving state.

[0131] In another example, the first indication information may include an index of the synchronization broadcast block of the expected first cell, wherein the index of the synchronization broadcast block of the expected first cell can be used to determine the beam or beam direction of the synchronization broadcast block of the expected first cell. Exemplarily, in combination with Figure 4 or Figure 5 above, it can be seen that the terminal device may receive a long-period synchronization broadcast block or a simplified synchronization broadcast block before sending an uplink wake-up signal. As shown in Figure 2, different SSB indexes correspond to different beam directions, and the terminal device has different received signal strengths for SSBs in different beam directions, so that the terminal device can use the beam corresponding to the SSB with stronger signal strength as the beam or beam direction of the synchronization broadcast block of the expected first cell. For example, the SSB index (index) included in the first indication information is one or more integers of "0-63", or one or more integers of "0-16".

[0132] In another example, different uplink wake-up signal sequences may indicate the index of the synchronization broadcast block of the desired first cell. For example, uplink wake-up signal sequence 1 indicates the index 1 of the synchronization broadcast block of the desired first cell; and uplink wake-up signal sequence 2 indicates the index 2 of the synchronization broadcast block of the desired first cell.

[0133] In one possible design, the uplink wake-up signal also carries second indication information, and the second indication information is used to indicate at least one of the following: the second cell to be awakened, whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold, whether the path loss of the terminal device is greater than or equal to the path loss threshold, or whether the terminal device is a reduced-capability device.

[0134] The following is a brief description of the above contents:

[0135] a. The second cell you want to wake up

[0136] It is understandable that the number of the second cell may be one or more. The second cell is different from the first cell. For example, the first cell and the second cell may belong to the same cell group. For another example, the second cell is a neighboring cell of the first cell.

[0137] b. Whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold

[0138] Exemplarily, when the second indication information indicates whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold, the network device may obtain whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold. Exemplarily, if the uplink data cache size of the terminal device is greater than or equal to the cache threshold, the network device may determine to wake up the first cell; otherwise, the first cell may not be woken up.

[0139] c. Whether the path loss of the terminal device is greater than or equal to the path loss threshold

[0140] Exemplarily, when the second indication information indicates whether the path loss of the terminal device is greater than or equal to the path loss threshold, the network device can obtain whether the path loss of the terminal device is greater than or equal to the path loss threshold. Exemplarily, the network device can further determine the transmission power of the synchronization broadcast block of the first cell.

[0141] d. Whether the terminal device is a reduced-capacity device

[0142] Exemplarily, when the second indication information indicates whether the terminal device is a reduced-capability device, if the terminal device is a reduced-capability device, if the first cell is awakened, exemplarily, the first cell can directly reply to Msg2 (e.g., a random access response (RAR) message). Exemplarily, RAR occupies 20MHz bandwidth, that is, the terminal device does not need to send a random access request message (e.g., preamble) at this time, thereby reducing the access complexity for the reduced-capability device.

[0143] It can be understood that the above a to d are only examples and are not intended to limit the present application. The second indication information may also carry other content.

[0144] In one possible implementation, the second indication information includes a first information element, a second information element, and a third signal, wherein the first information element can be used to indicate whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold. The first information element can occupy 1 bit. When the value of the 1 bit occupied by the first information element is 1, it indicates that the uplink data cache size of the terminal device is greater than or equal to the cache threshold. When the value of the 1 bit occupied by the first information element is 0, it indicates that the uplink data cache size of the terminal device is less than the cache threshold. Similarly, the second information element can occupy 1 bit. When the value of the 1 bit occupied by the second information element is 1, it indicates that the path loss of the terminal device is greater than or equal to the path loss threshold. When the value of the 1 bit occupied by the first information element is 0, it indicates that the path loss of the terminal device is less than the path loss threshold. The third information element can occupy 1 bit. When the value of the 1 bit occupied by the third information element is 1, it indicates that the terminal device is a reduced-capability device. When the value of the 1 bit occupied by the third information element is 0, it indicates that the terminal device is not a reduced-capability device.

[0145] In another possible implementation, when the uplink data cache size of the terminal device is greater than or equal to the cache threshold, the second indication information includes a fourth information element, and the fourth information element is used to indicate that the uplink data cache size of the terminal device is greater than or equal to the cache threshold. If the second indication information does not include the fourth information element, it indicates that the uplink data cache size of the terminal device is less than the cache threshold. Similarly, when the path loss of the terminal device is greater than or equal to the path loss threshold, the second indication information includes a fifth information element, and the fifth information element is used to indicate that the path loss of the terminal device is greater than or equal to the path loss threshold. If the second indication information does not include the fifth information element, it indicates that the path loss of the terminal device is less than the path loss threshold. When the terminal device is a reduced-capability device, the second indication information includes a sixth information element, and the sixth information element is used to indicate that the terminal device is a reduced-capability device. If the second indication information does not include the sixth information element, it indicates that the terminal device is not a reduced-capability device.

[0146] For example, the uplink wake-up signal can carry 16 bits of information, assuming that the bit index starts from 0, where bits 0 to 3: indicate the period of the SSB of the expected first cell, as shown in Table 2; bits 4 to 10: indicate the SSB index of the expected first cell; bit 11: indicates whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold. Bits 12 to 14 indicate at least one of the network slice group identifier, network slice identifier, emergency service identifier, data radio bearer identifier, or logical channel identifier corresponding to the service initiated by the terminal device. Bit 15 indicates whether the path loss of the terminal device is greater than or equal to the path loss threshold. It will be understood that the above bit allocation method is only an example and is not a limitation of this application.

[0147] Table 2

[0148] In another possible implementation, different uplink wake-up signal sequences indicate whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold and / or whether the path loss of the terminal device is greater than or equal to the path loss threshold. For example, uplink wake-up signal sequence 1 indicates that the uplink data cache size of the terminal device is greater than or equal to the cache threshold and / or the path loss of the terminal device is greater than or equal to the path loss threshold. Uplink wake-up signal sequence 2 indicates that the uplink data cache size of the terminal device is less than the cache threshold and / or the path loss of the terminal device is less than the path loss threshold.

[0149] Illustratively, before step 600 , the terminal device may receive configuration information of an uplink wake-up signal, and then the terminal device may send an uplink wake-up signal according to the configuration information of the uplink wake-up signal.

[0150] In one possible implementation, the configuration information of the uplink wake-up signal includes at least one of the following: waveform information of the uplink wake-up signal, the number of bits carried by a symbol occupied by the uplink wake-up signal, time domain resource information of the uplink wake-up signal, frequency domain resource information of the uplink wake-up signal, the maximum number of times the uplink wake-up signal is sent, the power ramping step (powerRampingStep) of the uplink wake-up signal, the cache threshold, or the path loss threshold.

[0151] The following is a brief description of the above contents:

[0152] A. Waveform information of the uplink wake-up signal and the number of bits carried by one symbol occupied by the uplink wake-up signal

[0153] Exemplarily, the waveform information of the uplink wake-up signal indicates that the waveform of the uplink wake-up signal is any one of the following: a coordinated waveform of on-off keying (OOK) and orthogonal frequency division multiplexing (OFDM), multi-carrier amplitude shift keying (ASK), multi-carrier frequency shift keying (FSK), or OFDM.

[0154] Exemplarily, a harmonized waveform of OOK and OFDM refers to transmitting a specific OFDM sequence on an OOK symbol.

[0155] For example, when the waveform of the uplink wake-up signal is a multi-carrier ASK waveform, the uplink wake-up signal may be implemented as follows:

[0156] Mode 1: Each OFDM symbol carries 1 bit and occupies L OFDM symbols.

[0157] Mode 2: Each OFDM symbol carries M bits in the frequency domain and occupies L OFDM symbols.

[0158] Mode 3: multi-tone single bit, occupying L OFDM symbols.

[0159] Mode 4: Carrying M bits in the time domain, occupying L OFDM symbols.

[0160] Wherein, L is a positive integer, for example, L=4, and the value of L can be specified by the protocol.

[0161] When the waveform of the uplink wake-up signal is a multi-carrier FSK waveform, the uplink wake-up signal can be implemented in the following ways:

[0162] Mode 1: N subcarriers are divided into Q pairs of segments, each segment includes one carrier or multiple carriers, and occupies L OFDM symbols.

[0163] Method 2: N subcarriers are divided into 2 Q For segments, each segment includes one carrier or multiple carriers, occupying L OFDM symbols.

[0164] Where N and Q are positive integers, and Q represents the number of bits carried by one symbol occupied by the uplink wake-up signal. For example, N = 16, Q = 2, and L = 4. The values ​​of N, Q, and L may be specified by the protocol.

[0165] In addition, the uplink wake-up signal can also be carried by Zadoff Chu or M sequence.

[0166] B. Time domain resource information and frequency domain resource information of uplink wake-up signal

[0167] Exemplarily, the time domain resource information of the uplink wake-up signal indicates at least one of a period, a duration, and an offset of the uplink wake-up signal. For example, the period of the uplink wake-up signal may be 5ms, 10ms, 20ms, 40ms, 80ms, 160ms, 320ms, or 640ms.

[0168] C. Maximum number of times the uplink wake-up signal is sent

[0169] For example, when the terminal device fails to monitor the synchronization broadcast block and / or system information block of the first cell, the terminal device may determine whether to perform related operations based on the maximum number of times the uplink wake-up signal is sent.

[0170] D. Power ramp-up step for uplink wake-up signals

[0171] Exemplarily, when the terminal device fails to monitor the synchronization broadcast block and / or system information block of the first cell, the terminal device may increase the transmission power of the uplink wake-up signal according to the power climbing step size of the uplink wake-up signal.

[0172] E. Cache Threshold

[0173] Exemplarily, the terminal device may determine whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold based on the cache threshold. If the terminal device determines that the uplink data cache size of the terminal device is greater than or equal to the cache threshold, the terminal device may send an uplink wake-up signal. Otherwise, the terminal device will not send an uplink wake-up signal until the uplink data cache size of the terminal device is greater than or equal to the cache threshold. Exemplarily, whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold may be indicated by the above-mentioned second indication information.

[0174] F. Path loss threshold

[0175] Exemplarily, the terminal device may determine whether the path loss of the terminal device is greater than or equal to the path loss threshold based on the path loss threshold, and may indicate this through the above-mentioned second indication information. For example, the path loss may be determined based on whether the terminal device receives a long-period synchronization broadcast block, a simplified synchronization broadcast block, or a downlink low-power synchronization signal.

[0176] It is understood that the above A to F are merely examples and are not intended to limit the present application, and the configuration information of the uplink wake-up signal may also include other contents. In addition, at least one of the above A to F may also be agreed upon through a protocol.

[0177] In one possible implementation, the configuration information of the uplink wake-up signal may further include first information, and the first information includes at least one of the following information: access identity, network slice group identifier, network slice identifier, emergency service identifier, data radio bearer identifier (DRB), and logical channel identifier (logical channel ID). It is understandable that the first information may also include other content, which is not limited in this application. The first information is used by the terminal device to determine whether to send an uplink wake-up signal.

[0178] For example, the network slice group identifier can be a network slice access layer group identifier (network slice as group ID, NSAG ID), and the network slice identifier can be single network slice selection assistance information (S-NSSAI).

[0179] In one example, the first information may include an access identifier, wherein the number of access identifiers may be one or more, and the access identifier included in the first information is the access identifier of a terminal device that is allowed to send an uplink wake-up signal. When the access identifier of the terminal device belongs to the access identifier included in the first information, the terminal device sends an uplink wake-up signal. In addition, in a possible implementation, if the access identifier of the terminal device belongs to the access identifier included in the first information, the uplink wake-up signal may also carry the access identifier of the terminal device.

[0180] In another example, the first information may include a network slice group identifier, where the number of network slice group identifiers may be one or more, and when the network slice group identifier corresponding to the service initiated by the terminal device belongs to the network slice group identifier included in the first information, the terminal device sends an uplink wake-up signal. In addition, in a possible implementation, if the network slice group identifier corresponding to the service initiated by the terminal device belongs to the network slice group identifier included in the first information, the uplink wake-up signal may also carry the network slice group identifier corresponding to the service initiated by the terminal device, for example, the network slice group identifier may be indicated by bits 12 to 14 of the 16-bit information carried by the uplink wake-up signal.

[0181] It is understandable that the network slice group identifier can also be replaced by the network slice identifier, emergency service, data radio bearer identifier, and logical channel identifier.

[0182] In one example, if the service initiated by the terminal device is an emergency service included in the first information, the terminal device sends an uplink wake-up signal. In another example, if the first information does not include an emergency service identifier, or even if the terminal device does not monitor the first information, if the service initiated by the terminal device is an emergency service, the terminal device can directly send an uplink wake-up signal.

[0183] In one example, when the data radio bearer identifier corresponding to the service initiated by the terminal device belongs to the data radio bearer identifier included in the first information, the terminal device sends an uplink wake-up signal. Alternatively, when the logical channel identifier corresponding to the service initiated by the terminal device belongs to the logical channel identifier included in the first information, the terminal device sends an uplink wake-up signal.

[0184] In addition, in a possible implementation, if the access identifier of the terminal device belongs to the access identifier included in the first information, the uplink wake-up signal may also carry the access identifier of the terminal device.

[0185] Exemplarily, the configuration information of the uplink wake-up signal is carried by one of the following: a broadcast message, a downlink low-power synchronization signal, a downlink wake-up signal, or a radio resource control (RRC) signaling.

[0186] In one example, the broadcast message may carry configuration information of one or more uplink wake-up signals.

[0187] For example, as shown in Table 3 below, the broadcast message may indicate the configuration information of the uplink wake-up signal of one or more cells. Cell ID list 1 or physical cell identifier (PCI) list 1 corresponds to the configuration information 1 of the uplink wake-up signal; Cell ID list 2 or PCI list 2 corresponds to the configuration information 2 of the uplink wake-up signal. When the terminal device expects to wake up a cell in Cell ID list 1 or a cell in PCI list 1, the terminal device may send an uplink wake-up signal based on the configuration information 1 of the uplink wake-up signal, and so on.

[0188] Table 3

[0189] Exemplarily, the broadcast message may include K sets of uplink wake-up signal configuration information corresponding to K cells, or may be described as K uplink wake-up signals being used to wake up K cells, where K is a positive integer. For example, the broadcast message may include configuration information for an uplink wake-up signal used to wake up a first cell, configuration information for an uplink wake-up signal used to wake up a second cell, and so on.

[0190] In another example, the downlink low-power synchronization signal is a synchronization signal with a long period, for example, the period of the downlink low-power synchronization signal is {320ms, 640ms, 1280ms, 2560ms, 5120ms, 10240ms}. The terminal device can perform time and frequency synchronization based on the downlink low-power synchronization signal. The downlink low-power synchronization signal can also be used to carry configuration information of the uplink wake-up signal of the corresponding cell.

[0191] In another example, for an inactive terminal device and a connected terminal device, the configuration information of the uplink wake-up signal can be carried by RRC signaling. For example, for an inactive terminal device, the RRC signaling is an RRC release message. At this time, the uplink wake-up signal configured by the configuration information of the uplink wake-up signal is used to wake up the last serving cell (and / or other cells) of the terminal device. For a connected terminal device, the RRC signaling is an RRC reconfiguration message. At this time, the uplink wake-up signal configured by the configuration information of the uplink wake-up signal is used to wake up the current serving cell (and / or other cells) of the terminal device. For details, please refer to Table 3 above.

[0192] In another example, the configuration information of the uplink wake-up information can be indicated as 16 bits of information, assuming that the bit index starts from 0, where bits 0 to 3: indicate the period of the uplink wake-up signal, as shown in Table 2; bits 4 to 8: indicate the time domain resource information and frequency domain resource information of the uplink wake-up signal. For example, the terminal device can obtain the correspondence between the time domain resource information and frequency domain resource information of the uplink wake-up signal and the time-frequency resource index. The correspondence can be predefined or configured in advance by the protocol, and bits 4 to 8 can indicate the specific time-frequency resource index. For another example, bits 4 to 8 indicate the time-frequency resource position and the corresponding offset of the initial uplink bandwidth part (bandwidth part BWP) of the terminal device, bits 9 to 10: indicate at least one of the following: network slice group identifier, network slice identifier, emergency service identifier, data radio bearer identifier, or logical channel identifier, that is, indicate part or all of the content of the first information; bit 11: indicates the cache threshold; bit 12: indicates the access identifier; bits 13 to 14: indicate the maximum number of times the uplink wake-up signal is sent; bit 15: indicates the power climbing step of the uplink wake-up signal. It should be understood that the above bit allocation method is only an example and is not intended to limit the present application.

[0193] Accordingly, the network device receives an uplink wake-up signal from the terminal device. Exemplarily, the network device receives the uplink wake-up signal via a secondary receiver. When the network device decides to wake up the first cell, the network device may transmit a synchronization broadcast block or a system information block of the first cell via the primary transceiver module. Therefore, the primary transceiver module may remain in a dormant or energy-saving state before waking up the first cell, thereby achieving the maximum possible energy-saving gain. Exemplarily, the secondary receiver may be a module in the low-power transceiver module.

[0194] As shown in Figure 7A, the terminal device sends an uplink wake-up signal through the low-power transceiver module (LR), and the network device receives the uplink wake-up signal through the low-power transceiver module (LR). As shown in Figure 7B, the terminal device sends an uplink wake-up signal through the main transceiver module (MR) or the low-power transceiver module (LR), and the network device receives the uplink wake-up signal through the low-power transceiver module (LR).

[0195] Step 610: The terminal device monitors the synchronization broadcast block and / or system information block of the first cell.

[0196] Exemplarily, the synchronization broadcast block is SSB and the system information block is SIB1.

[0197] Optionally, in step 620, the network device broadcasts the synchronization broadcast block and / or system information block of the first cell.

[0198] It should be noted that this application does not limit the order of step 610 and step 620.

[0199] In one possible implementation, the network device may broadcast the synchronization broadcast block and / or system information block of the first cell according to the first indication information. Exemplarily, the network device may determine the period of the synchronization broadcast block of the first cell and / or the index of the synchronization broadcast block according to the first indication information.

[0200] For example, if the first indication information includes the period and / or index of the synchronization broadcast block of the expected first cell, the network device can determine that the period of the synchronization broadcast block of the first cell is the period of the synchronization broadcast block of the expected first cell, and / or, the network device can determine that the beam of the synchronization broadcast block of the first cell is the beam corresponding to the index of the synchronization broadcast block of the expected first cell.

[0201] For another example, if the first indication information is used to indicate that the expected period of the synchronization broadcast block of the first cell is less than 160 ms, the network device may determine that the period of the synchronization broadcast block of the first cell is 40 ms.

[0202] It is understandable that after the terminal device sends the uplink wake-up signal, the terminal device may monitor the synchronization broadcast block and / or system information block of the first cell, that is, the first cell is awakened, hereinafter referred to as scenario 1. Alternatively, the synchronization broadcast block and / or system information block of the first cell may not be monitored, that is, the first cell is not awakened, hereinafter referred to as scenario 2.

[0203] The following describes the possible processes of interaction between the terminal device and the network device after sending the uplink wake-up signal for the above scenario 1 and scenario 2 respectively.

[0204] It should be noted that the embodiments shown in the following Figures 8, 9, 10 and 12 can be combined with the embodiment shown in the above Figure 4, or can be used as separate embodiments.

[0205] Figure 8 shows one possible process of interaction between the terminal device and the network device after sending the uplink wake-up signal in scenario 1:

[0206] Step 800: The terminal device sends an uplink wake-up signal, wherein the uplink wake-up signal is used to wake up the first cell.

[0207] Step 810: The first cell broadcasts a synchronization broadcast block and / or a system information block of the first cell.

[0208] Exemplarily, in response to the uplink wake-up signal, the first cell broadcasts a synchronization broadcast block and / or a system information block of the first cell.

[0209] Step 820: The terminal device sends a random access request message.

[0210] Exemplarily, the terminal device sends a random access request message based on the monitored synchronization broadcast block and / or system information block of the first cell, where the random access request message is used to request access to the first cell.

[0211] Exemplarily, the terminal device sends a random access request message to the first cell.

[0212] Step 830: The first cell sends a random access response message to the terminal device. Correspondingly, the terminal device receives the random access response message from the first cell.

[0213] Exemplarily, the first cell sends a random access response message according to the received random access request message.

[0214] Exemplarily, the random access response message may include at least one of the following: a timing advance command, a temporary cell-radio network temporary identifier (C-RNTI), and an uplink grant (UL grant).

[0215] Using the embodiment shown in FIG8 , after the terminal device sends an uplink wake-up signal, if the terminal device wakes up the first cell, it sends a random access request message based on the received synchronization broadcast block and / or system information block of the first cell.

[0216] Figure 9 shows the second possible process of interaction between the terminal device and the network device after sending the uplink wake-up signal in scenario 1:

[0217] Step 900: The terminal device sends an uplink wake-up signal, wherein the uplink wake-up signal is used to wake up the first cell.

[0218] Exemplarily, the terminal device sends an uplink wake-up signal to the first cell.

[0219] Step 910: The first cell broadcasts a synchronization broadcast block and / or a system information block of the first cell.

[0220] Exemplarily, in response to the uplink wake-up signal, the first cell broadcasts a synchronization broadcast block and / or a system information block of the first cell.

[0221] Step 920: The first cell sends a random access response message to the terminal device.

[0222] Correspondingly, the terminal device randomly accesses a response message according to the monitored synchronization broadcast block and / or system information block of the first cell, wherein the random access response message includes information of the uplink wake-up signal.

[0223] Exemplarily, the uplink wake-up signal information includes all or part of the information carried in the uplink wake-up signal sent by the terminal device, or the sequence index of the uplink wake-up signal. For example, when the waveform of the uplink wake-up signal is a coordinated waveform of OOK and OFDM, the uplink wake-up signal information may include the sequence index of the uplink wake-up signal.

[0224] Exemplarily, the random access response message may further include at least one of the following: a timing advance command, a temporary C-RNTI, and an uplink grant.

[0225] Using the embodiment shown in FIG9 , the terminal device does not need to send a random access request message. The terminal device only sends an uplink wake-up signal. The uplink wake-up signal can achieve the function of the random access request message, thereby reducing the delay of the terminal device accessing the network.

[0226] Figure 10 shows one possible process of interaction between the terminal device and the network device after sending the uplink wake-up signal in scenario 2:

[0227] Step 1000: The terminal device sends an uplink wake-up signal, wherein the uplink wake-up signal is used to wake up the first cell.

[0228] Exemplarily, the terminal device sends an uplink wake-up signal to the first cell.

[0229] Step 1010: If the first condition is met, the terminal device sends a random access request message to the first cell.

[0230] Among them, the first condition includes determining that the maximum number of times the uplink wake-up signal is sent is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored; and / or, starting the timing from the first time the uplink wake-up signal is sent, determining that the first preset time length is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored.

[0231] For example, as shown in Figure 11, assuming that the maximum number of times the uplink wake-up signal is sent is 3, the terminal device sends a random access request message to the first cell three times and fails to monitor the synchronization broadcast block and / or system information block of the first cell, then the terminal device sends a random access request message, such as a preamble, to the first cell. Exemplarily, the maximum number of times the uplink wake-up signal is sent can be carried by the configuration information of the uplink wake-up signal or explicitly specified in the protocol.

[0232] For example, as shown in Figure 11, assuming that the first preset duration is 128ms, the terminal device sends a random access request message to the first cell and starts a timer with a duration of 128ms. When the timer times out and the synchronization broadcast block and / or system information block of the first cell is not monitored, the terminal device sends a random access request message to the first cell. Exemplarily, the first preset duration can be carried by the configuration information of the above-mentioned uplink wake-up signal, or clearly specified in the protocol.

[0233] It is understandable that the terminal device can send an uplink wake-up signal to the first cell once or multiple times.

[0234] Exemplarily, the terminal device can determine the transmission power of the uplink wake-up signal based on the path loss of the terminal device. For example, the path loss can be determined based on the long-period synchronization broadcast block or the simplified synchronization broadcast block or the downlink low-power synchronization signal received by the terminal device. In addition, the terminal device can also perform time-frequency synchronization and / or automatic gain control (AGC) adjustment based on the long-period synchronization broadcast block or the simplified synchronization broadcast block or the downlink low-power synchronization signal received. After the terminal device sends an uplink wake-up signal once or multiple times, if the synchronization broadcast block and / or system information block of the first cell is not monitored, the terminal device can increase the transmission power of the uplink wake-up signal. For example, the terminal device can increase the transmission power of the uplink wake-up signal based on the power climbing step size of the uplink wake-up signal. Exemplarily, the power climbing step size of the uplink wake-up signal can be carried by the configuration information of the above-mentioned uplink wake-up signal or clearly specified in the protocol.

[0235] Exemplarily, the random access request message in step 1010 may include a random access sequence, where the random access sequence may also be called a preamble. The random access sequence may be a traditional random access sequence or a specific random access sequence.

[0236] In one possible implementation, the terminal device can determine the random access sequence based on third indication information, wherein the third indication information indicates at least one of the following: a root sequence index of a random access request message, a random access sequence index, or a beam association configuration of a downlink low-power synchronization signal and a random access sequence.

[0237] Exemplarily, the downlink low-power synchronization signal here may be a long-period synchronization broadcast block or a simplified synchronization broadcast block or a downlink low-power synchronization signal.

[0238] Exemplarily, the third indication information may further include time-frequency resource information occupied by the random access request message, and the terminal device may send the random access request message according to the time-frequency resource information.

[0239] In addition, in one example, the third indication information may further include an identifier of the first cell, or the third indication information corresponds to the identifier of the first cell. This indicates that the random access request message determined based on the third indication information corresponds to the first cell, or is described as: the random access request message determined based on the third indication information is used to request access to the first cell.

[0240] For example, the third indication information corresponds to the identifier of the first cell, and the third indication information includes the root sequence index of the random access request message. When the terminal device sends a random access request message to the first cell, the random access request message is determined according to the root sequence index of the random access request message in the third indication information.

[0241] In another example, as shown in Table 4 below, the first cell or the third cell may indicate third indication information corresponding to one or more cells. Cell ID list 1 or PCI list 1 corresponds to third indication information 1; Cell ID list 2 or PCI list 2 corresponds to third indication information 2. When a terminal device sends a random access request message to a cell in Cell ID list 1 or a cell in PCI list 1, the terminal device may determine the random access request message based on the third indication information.

[0242] Table 4

[0243] In another example, the number of third indication information is W, and the W third indication information corresponds one-to-one to the identifiers of W cells, and W is a positive integer. That is, the terminal device can determine the random access request message based on the third indication information corresponding to the i-th cell among the W cells, and the random access request message is used to request access to the i-th cell, where 1≤i≤W.

[0244] Exemplarily, the terminal device may receive the third indication information from the first cell, or the terminal device may receive the third indication information from the third cell.

[0245] Corresponding to step 1010, the first cell receives a random access request message from the terminal device. If the random access request message includes a specific random access sequence, the first cell may also send a synchronization broadcast block and / or a system information block. Furthermore, the first cell may send a random access response message to the terminal device.

[0246] Step 1020: The terminal device monitors the random access response message.

[0247] Using the embodiment shown in FIG. 10 , after the terminal device sends the uplink wake-up signal, if the first condition is met, the terminal device may directly send a random access request message to the first cell.

[0248] Figure 12 shows the second possible process of interaction between the terminal device and the network device after sending the uplink wake-up signal in scenario 2:

[0249] Step 1200: The terminal device sends an uplink wake-up signal, wherein the uplink wake-up signal is used to wake up the first cell.

[0250] Exemplarily, the terminal device sends an uplink wake-up signal to the first cell.

[0251] Step 1210: If the first condition is met, the terminal device sends a random access request message to the second cell.

[0252] The second cell is a cell reselected by the terminal device or a designated cell. The first condition may refer to the above step 1020. Exemplarily, the third indication information may also indicate the second cell, that is, the designated cell may be indicated by the third indication information.

[0253] Exemplarily, the random access request message in step 1010 may include a random access sequence, wherein the random access sequence may be a traditional random access sequence or a specific random access sequence.

[0254] In a possible implementation, the terminal device may determine the random access sequence according to third indication information, and the third indication information may refer to the above step 1020.

[0255] Exemplarily, the terminal device may receive the third indication information from the first cell, or the terminal device may receive the third indication information from a third cell, wherein the third cell may be the same as or different from the second cell, which is not limited in this application.

[0256] Step 1220: The second cell sends a random access response message to the terminal device.

[0257] Optionally, step 1230A: after the random access process is completed, the terminal device sends the identifier of the first cell to the second cell, so that the second cell wakes up the first cell.

[0258] Exemplarily, the terminal device sends an RRC uplink information transfer (ULInformationTransfer) message to the second cell, where the message includes the identifier of the first cell.

[0259] Optionally, step 1230B: after the random access process is completed, the second cell determines, based on the random access request message, that the terminal device desires to wake up the first cell.

[0260] In a possible implementation, the second cell may determine that the cell that the terminal device expects to activate is the first cell based on the time-frequency resources occupied by the random access request message or the random access sequence used by the random access request message.

[0261] Either or both of step 1230A and step 1230B may be performed.

[0262] Optionally, step 1240: the second cell may send a first message to the first cell.

[0263] Exemplarily, the first message is a cell activation message or a cell wake-up message. Optionally, the first message includes an identifier of the first cell.

[0264] Using the embodiment shown in FIG. 12 , after the terminal device sends an uplink wake-up signal, if the first condition is met, the terminal device may first access the second cell and then wake up the first cell through the second cell.

[0265] In addition, the present application also provides a communication method for enabling a terminal device to determine whether to send an uplink wake-up signal or a random access request message, thereby activating a base station or a cell and sending a synchronization information block and system broadcast information (SIB1).

[0266] In one possible implementation, the terminal device determines whether to send an uplink wake-up signal based on the second information. If the terminal device satisfies any one or more of the information included in the second information, the terminal device sends the uplink wake-up signal; otherwise, the terminal device does not send the uplink wake-up signal. The second information may be configured by the network device or specified by the protocol. For information about the waveform of the uplink wake-up signal, please refer to the relevant content in A above.

[0267] The terminal device determines whether to send a random access request message or a random access preamble based on the third information. If the terminal device satisfies any one or more of the requirements of the third information, the terminal device sends the random access request message; otherwise, the terminal device does not send the random access request message. The third information may be configured by the network device or specified by the protocol. The second information is different from the third information.

[0268] In one possible implementation, the second information indicates an emergency service or a high-priority service. Exemplarily, the second information includes at least one of the following information: a first access identifier, a first network slice group identifier, a first network slice identifier, a first emergency service identifier, a first data radio bearer identifier, and a first logical channel identifier.

[0269] The third information indicates a non-emergency service or a low-priority service. The third information includes at least one of the following information: a second access identifier, a second network slice group identifier, a second network slice identifier, a second emergency service identifier, a second data radio bearer identifier, and a second logical channel identifier.

[0270] In another possible implementation, the terminal device determines whether to send an uplink wake-up signal based on the second information. If the terminal device satisfies any one or more of the information included in the second information, the terminal device sends the uplink wake-up signal; otherwise, the terminal device sends a random access request message. Alternatively, if the terminal device satisfies any one or more of the information included in the second information, the terminal device sends the uplink wake-up signal; if the terminal device determines that none of the information included in the second information is satisfied, the terminal device sends a random access request message. The second information may be configured by the network device or specified by the protocol.

[0271] Exemplarily, the second information and / or the third information may be indicated by a network device, for example, by one of the following: a broadcast message, a downlink low-power synchronization signal, a downlink wake-up signal, or RRC signaling.

[0272] Exemplarily, the period of the random access request message is greater than the period of the uplink wake-up signal. As shown in Figure 13, a RACH occasion (RO) is a time when a network device receives a random access request message, or a time when a terminal device sends a random access request message. A UL-WUS occasion is a time when a network device receives an uplink wake-up signal, or a time when a terminal device sends an uplink wake-up signal. The network device receives the uplink wake-up signal via the LR and receives the random access request message via the MR.

[0273] The above method ensures that emergency or high-priority services can quickly wake up the cell via an uplink wake-up signal. The base station receives the uplink wake-up signal via the LR, achieving both rapid cell activation and base station energy conservation. For non-emergency or low-priority services, the existing random access process can be used to activate the cell.

[0274] It is understood that in order to implement the functions in the above embodiments, the network devices and terminals include hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily appreciate that, in conjunction with the units and method steps of each example described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in hardware or in a manner driven by computer software depends on the specific application scenario and design constraints of the technical solution.

[0275] Figures 14 and 15 are schematic diagrams of the structures of possible communication devices provided in embodiments of the present application. These communication devices can be used to implement the functions of the terminal or network device in the above-mentioned method embodiments, thereby also achieving the beneficial effects possessed by the above-mentioned method embodiments. In the embodiments of the present application, the communication device can be one of the terminals 120a-120j shown in Figure 1, or it can be the base station 110a or 110b shown in Figure 1, or it can be a module (such as a chip) applied to the terminal or base station.

[0276] As shown in Figure 14, the communication device 1400 includes a processing unit 1410 and a transceiver unit 1420. The communication device 1400 is used to implement the functions of the terminal or network device in the method embodiments shown in Figures 6, 8, 9, 10, and 12 above.

[0277] When the communication device 1400 is used to implement the functions of the terminal device in the method embodiments shown in FIG6 , FIG8 , FIG9 , FIG10 , and FIG12 :

[0278] The processing unit 1410 calls the transceiver unit 1420 to send an uplink wake-up signal, where the uplink wake-up signal is used to wake up the first cell. The uplink wake-up signal carries first indication information, where the first indication information indicates the expected period of the synchronization broadcast block of the first cell and / or the beam of the synchronization broadcast block; and monitors the synchronization broadcast block and / or system information block of the first cell.

[0279] In one possible design, the uplink wake-up signal also carries second indication information, and the second indication information is used to indicate at least one of the following: the second cell to be awakened, whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold, whether the path loss of the terminal device is greater than or equal to the path loss threshold, or whether the terminal device is a reduced-capability device.

[0280] In one possible design, the transceiver unit 1420 is used to send the uplink wake-up signal according to the configuration information of the uplink wake-up signal when sending the uplink wake-up signal.

[0281] In one possible design, the configuration information of the uplink wake-up signal includes at least one of the following: waveform information of the uplink wake-up signal, the number of bits carried by a symbol occupied by the uplink wake-up signal, time domain resource information of the uplink wake-up signal, frequency domain resource information of the uplink wake-up signal, the maximum number of transmissions of the uplink wake-up signal, the power climbing step of the uplink wake-up signal, the cache threshold, or the path loss threshold.

[0282] In one possible design, the waveform information of the uplink wake-up signal indicates that the waveform of the uplink wake-up signal is any one of the following: a coordinated waveform of OOK and OFDM, the multi-carrier amplitude shift keying ASK, the multi-carrier frequency shift keying FSK, or OFDM.

[0283] In one possible design, the configuration information of the uplink wake-up signal also includes first information, and the first information includes at least one of the following information: access identifier, network slice group identifier, network slice identifier, emergency service identifier, data radio bearer identifier, and logical channel identifier; the first information is used by the terminal device to determine whether to send the uplink wake-up signal.

[0284] In one possible design, the configuration information of the uplink wake-up signal is carried by one of the following: a broadcast message, a downlink low-power synchronization signal, a downlink wake-up signal, or a radio resource control RRC signaling.

[0285] In one possible design, the transceiver unit 1420 is used to send the random access request message to the first cell according to the monitored synchronization broadcast block and / or system information block of the first cell after sending the uplink wake-up signal.

[0286] In one possible design, the transceiver unit 1420 is used to send the random access request message to the first cell after sending the uplink wake-up signal, determining that the first condition is met according to the processing unit 1410; wherein the first condition includes determining that the maximum number of times the uplink wake-up signal is sent is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored; and / or, starting the timing from the first time the uplink wake-up signal is sent, determining that the first preset time length is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored.

[0287] In one possible design, the transceiver unit 1420 is used to, after sending an uplink wake-up signal, determine that a first condition is met according to the processing unit 1410, and send the random access request message to the second cell; wherein the first condition includes determining that the maximum number of times the uplink wake-up signal is sent is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored; and / or, starting the timing from the first time the uplink wake-up signal is sent, determining that a first preset time length is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored; after the random access process is completed, sending the identifier of the first cell to the second cell.

[0288] In one possible design, the second cell is a cell reselected by the terminal device or a designated cell.

[0289] In one possible design, the transceiver unit 1420 is used to receive third indication information from the first cell or the third cell, where the third indication information indicates at least one of the following: time-frequency resource information occupied by the random access request message, the root sequence index of the random access request message, the random access sequence index, or the beam association configuration of the downlink low-power synchronization signal and the random access sequence.

[0290] In one possible design, the transceiver unit 1420 is used to receive a random access response message from the first cell after sending an uplink wake-up signal based on the synchronization broadcast block and / or system information block of the first cell monitored, and the random access response message includes information about the uplink wake-up signal.

[0291] In one possible design, the information of the uplink wake-up signal includes all or part of the information carried in the uplink wake-up signal sent by the terminal device, or the sequence index of the uplink wake-up signal.

[0292] When the communication device 1400 is used to implement the functions of the network device in the method embodiments shown in FIG6 , FIG8 , FIG9 , FIG10 , and FIG12 :

[0293] The processing unit 1410 calls the transceiver unit 1420 to receive the uplink wake-up signal, where the uplink wake-up signal is used to wake up the first cell. The uplink wake-up signal carries first indication information, and the first indication information indicates the expected period of the synchronization broadcast block of the first cell and / or the beam of the synchronization broadcast block; broadcasts the synchronization broadcast block and / or system information block of the first cell.

[0294] In one possible design, the transceiver unit 1420 is configured to receive the uplink wake-up signal through an auxiliary receiver when receiving the uplink wake-up signal.

[0295] In one possible design, the processing unit 1410 is used to determine the period of the synchronization broadcast block and / or the index of the synchronization broadcast block according to the first indication information before broadcasting the synchronization broadcast block according to the uplink wake-up signal.

[0296] In one possible design, the uplink wake-up signal also carries second indication information, and the second indication information is used to indicate at least one of the following: the second cell to be awakened, whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold, whether the path loss of the terminal device is greater than or equal to the path loss threshold, or whether the terminal device is a reduced-capability device.

[0297] In one possible design, the transceiver unit 1420 is used to send configuration information of the uplink wake-up signal before sending the uplink wake-up signal.

[0298] In one possible design, the configuration information of the uplink wake-up signal includes at least one of the following: waveform information of the uplink wake-up signal, the number of bits carried by a symbol occupied by the uplink wake-up signal, time domain resource information of the uplink wake-up signal, frequency domain resource information of the uplink wake-up signal, the maximum number of transmissions of the uplink wake-up signal, the power climbing step of the uplink wake-up signal, the cache threshold, or the path loss threshold.

[0299] In one possible design, the waveform information of the uplink wake-up signal indicates that the waveform of the uplink wake-up signal is any one of the following: a coordinated waveform of OOK and OFDM, the multi-carrier ASK, multi-carrier FSK, or OFDM.

[0300] In one possible design, the configuration information of the uplink wake-up signal also includes first information, and the first information includes at least one of the following information: access identifier, network slice group identifier, network slice identifier, emergency service identifier, data radio bearer identifier, and logical channel identifier; the first information is used by the terminal device to determine whether to send the uplink wake-up signal.

[0301] In one possible design, the configuration information of the uplink wake-up signal is carried by one of the following: a broadcast message, a downlink low-power synchronization signal, a downlink wake-up signal, or RRC signaling.

[0302] In one possible design, the transceiver unit 1420 is used to send a random access response message to the terminal device after broadcasting the synchronization broadcast block and / or system information block of the first cell according to the uplink wake-up signal, and the random access response message includes information of the uplink wake-up signal.

[0303] In one possible design, the information of the uplink wake-up signal includes all or part of the information carried in the uplink wake-up signal sent by the terminal device, or the sequence index of the uplink wake-up signal.

[0304] A more detailed description of the processing unit 1410 and the transceiver unit 1420 can be directly obtained by referring to the relevant descriptions in the method embodiments shown in Figures 6, 8, 9, 10, and 12, and will not be repeated here.

[0305] As shown in Figure 15, communication device 1500 includes a processor 1510 and an interface circuit 1520. Processor 1510 and interface circuit 1520 are coupled to each other. It is understood that interface circuit 1520 can be a transceiver or an input / output interface. Optionally, communication device 1500 may also include a memory 1530 for storing instructions executed by processor 1510, input data required by processor 1510 to execute instructions, or data generated by processor 1510 after executing instructions.

[0306] When the communication device 1500 is used to implement the methods shown in Figures 6, 8, 9, 10, and 12, the processor 1510 is used to implement the functions of the above-mentioned processing unit 1410, and the interface circuit 1520 is used to implement the functions of the above-mentioned transceiver unit 1420.

[0307] When the communication device is a chip used in a terminal, the terminal chip implements the terminal functions in the above method embodiments. The terminal chip receives information from other modules in the terminal (such as a radio frequency module or antenna), and the information is sent by the network device to the terminal; or the terminal chip sends information to other modules in the terminal (such as a radio frequency module or antenna), and the information is sent by the terminal to the network device.

[0308] When the above-mentioned communication device is a module applied to a network device, the network device module implements the functions of the network device in the above-mentioned method embodiment. The network device module receives information from other modules in the network device (such as a radio frequency module or an antenna), and the information is sent by the terminal to the network device; or the network device module sends information to other modules in the network device (such as a radio frequency module or an antenna), and the information is sent by the network device to the terminal. The network device module here can be a baseband chip of the network device, or it can be a DU or other module. The DU here can be a DU under the open radio access network (O-RAN) architecture.

[0309] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0310] In this application, another example of a device is provided, wherein the notification device includes at least one processor and at least one memory, the at least one processor and the at least one memory being coupled, the at least one memory being used to store instructions. When the instructions are executed by the at least one processor, the communication device executes the method in the above-described embodiment. For example, as shown in FIG15 , a communication device 1500 includes a processor 1510 and a memory 1530. The processor 1510 and the memory 1530 are coupled, and the memory 1530 stores instructions. When the instructions stored in the memory 1530 are executed by the processor 1510, the communication device 1500 executes the method executed by the network device or terminal in the above-described embodiment.

[0311] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions that can be executed by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disk, mobile hard disk, CD-ROM or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be an integral part of the processor. The processor and storage medium can be located in an ASIC. In addition, the ASIC can be located in a network device or a terminal. The processor and storage medium can also exist in a network device or a terminal as discrete components.

[0312] In the above embodiments, all or part of the embodiments may be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable device. The computer program or instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions may be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; an optical medium, such as a digital video disk; or a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

[0313] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0314] In this application, "at least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character " / " generally indicates that the previous and next associated objects are in an "or" relationship; in the formula of this application, the character " / " indicates that the previous and next associated objects are in a "division" relationship. "Including at least one of A, B and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

[0315] It is understood that the various numbers used in the embodiments of this application are merely for ease of description and are not intended to limit the scope of the embodiments of this application. The order of the sequence numbers of the above-mentioned processes does not necessarily imply a specific order of execution; the order of execution of the processes should be determined by their functions and inherent logic.

Claims

1. A communication method, characterized in that: The method includes: Sending an uplink wake-up signal, where the uplink wake-up signal is used to wake up the first cell, where the uplink wake-up signal carries first indication information, where the first indication information indicates a desired period of a synchronization broadcast block of the first cell and / or a beam of the synchronization broadcast block; Monitor the synchronization broadcast block and / or system information block of the first cell.

2. The method according to claim 1, characterized in that The uplink wake-up signal also carries second indication information, and the second indication information is used to indicate at least one of the following: the second cell expected to be awakened, whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold, whether the path loss of the terminal device is greater than or equal to the path loss threshold, or whether the terminal device is a reduced capability device.

3. The method according to claim 2, characterized in that Send an uplink wake-up signal, including: The uplink wake-up signal is sent according to the configuration information of the uplink wake-up signal.

4. The method according to claim 3, characterized in that The configuration information of the uplink wake-up signal includes at least one of the following: waveform information of the uplink wake-up signal, the number of bits carried by a symbol occupied by the uplink wake-up signal, time domain resource information of the uplink wake-up signal, frequency domain resource information of the uplink wake-up signal, the maximum number of transmission times of the uplink wake-up signal, the power climbing step of the uplink wake-up signal, the cache threshold, or the path loss threshold.

5. The method according to claim 4, characterized in that The waveform information of the uplink wake-up signal indicates that the waveform of the uplink wake-up signal is any one of the following: a coordinated waveform of on-off keying OOK and orthogonal frequency division multiplexing OFDM, multi-carrier amplitude shift keying ASK, multi-carrier frequency shift keying FSK, or OFDM.

6. The method according to any one of claims 3 to 5, characterized in that: The configuration information of the uplink wake-up signal also includes first information, which includes at least one of the following information: access identifier, network slice group identifier, network slice identifier, emergency service identifier, data wireless bearer identifier, and logical channel identifier; the first information is used by the terminal device to determine whether to send the uplink wake-up signal.

7. The method according to any one of claims 3 to 6, characterized in that: The configuration information of the uplink wake-up signal is carried by one of the following: a broadcast message, a downlink low-power synchronization signal, a downlink wake-up signal or a radio resource control RRC signaling.

8. The method according to any one of claims 1 to 7, characterized in that: After sending the uplink wake-up signal, it also includes: The random access request message is sent to the first cell according to the monitored synchronization broadcast block and / or system information block of the first cell.

9. The method according to any one of claims 1 to 7, characterized in that: After sending the uplink wake-up signal, it also includes: If a first condition is met, sending the random access request message to the first cell; Among them, the first condition includes determining that the maximum number of times the uplink wake-up signal is sent is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored; and / or, starting the timing from the first time the uplink wake-up signal is sent, determining that a first preset time length is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored.

10. The method according to any one of claims 1 to 7, characterized in that: After sending the uplink wake-up signal, it also includes: The first condition is met, and the random access request message is sent to the second cell; wherein the first condition includes determining that the maximum number of times the uplink wake-up signal is sent is reached, and the synchronization broadcast block and / or the system information block of the first cell is not monitored; and / or, starting from the first time the uplink wake-up signal is sent, determining that the first preset duration is reached, and the synchronization broadcast block and / or the system information block of the first cell is not monitored; After the random access process is completed, the identifier of the first cell is sent to the second cell.

11. The method according to claim 10, characterized in that The second cell is a cell reselected by the terminal device or a designated cell.

12. The method according to any one of claims 9 to 11, characterized in that: Also includes: Receive third indication information from the first cell or the third cell, the third indication information indicating at least one of the following: time-frequency resource information occupied by the random access request message, the root sequence index of the random access request message, the random access sequence index, or the beam association configuration of the downlink low-power synchronization signal and the random access sequence.

13. The method according to any one of claims 1 to 7, characterized in that: After sending the uplink wake-up signal, it also includes: A random access response message is received from the first cell according to the monitored synchronization broadcast block and / or system information block of the first cell, where the random access response message includes information of the uplink wake-up signal.

14. The method according to claim 13, characterized in that The information of the uplink wake-up signal includes all or part of the information carried in the uplink wake-up signal sent by the terminal device, or the sequence index of the uplink wake-up signal.

15. A communication method, characterized in that: The method includes: receiving the uplink wake-up signal, where the uplink wake-up signal is used to wake up the first cell, where the uplink wake-up signal carries first indication information, where the first indication information indicates a desired period of a synchronization broadcast block of the first cell and / or a beam of the synchronization broadcast block; Broadcast a synchronization broadcast block and / or a system information block of the first cell.

16. The method according to claim 15, characterized in that Receiving the uplink wake-up signal includes: The uplink wake-up signal is received by the auxiliary receiver.

17. The method according to claim 15 or 16, characterized in that Before broadcasting the synchronization broadcast block according to the uplink wake-up signal, the method includes: The period of the synchronized broadcast block and / or the index of the synchronized broadcast block is determined according to the first indication information.

18. The method according to any one of claims 15 to 17, characterized in that: The uplink wake-up signal also carries second indication information, and the second indication information is used to indicate at least one of the following: the second cell expected to be awakened, whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold, whether the path loss of the terminal device is greater than or equal to the path loss threshold, or whether the terminal device is a reduced capability device.

19. The method according to claim 18, characterized in that Before sending the uplink wake-up signal, it includes: Configuration information for sending uplink wake-up signals.

20. The method of claim 19, wherein: The configuration information of the uplink wake-up signal includes at least one of the following: waveform information of the uplink wake-up signal, the number of bits carried by a symbol occupied by the uplink wake-up signal, time domain resource information of the uplink wake-up signal, frequency domain resource information of the uplink wake-up signal, the maximum number of transmission times of the uplink wake-up signal, the power climbing step of the uplink wake-up signal, the cache threshold, or the path loss threshold.

21. The method of claim 19, wherein: The waveform information of the uplink wake-up signal indicates that the waveform of the uplink wake-up signal is any one of the following: a coordinated waveform of OOK and OFDM, the multi-carrier ASK, multi-carrier FSK, or OFDM.

22. The method according to any one of claims 19 to 21, characterized in that: The configuration information of the uplink wake-up signal also includes first information, which includes at least one of the following information: access identifier, network slice group identifier, network slice identifier, emergency service identifier, data wireless bearer identifier, and logical channel identifier; the first information is used by the terminal device to determine whether to send the uplink wake-up signal.

23. The method according to any one of claims 19 to 22, characterized in that: The configuration information of the uplink wake-up signal is carried by one of the following: a broadcast message, a downlink low-power synchronization signal, a downlink wake-up signal or a radio resource control RRC signaling.

24. The method according to any one of claims 15 to 23, characterized in that After broadcasting the synchronization broadcast block and / or system information block of the first cell according to the uplink wake-up signal, the method further includes: A random access response message is sent to the terminal device, where the random access response message includes information about the uplink wake-up signal.

25. The method of claim 24, wherein: The information of the uplink wake-up signal includes all or part of the information carried in the uplink wake-up signal sent by the terminal device, or the sequence index of the uplink wake-up signal.

26. A communication device, characterized in that: The device includes a processing unit and a transceiver unit, wherein the processing unit calls the transceiver unit to execute: sending an uplink wake-up signal, wherein the uplink wake-up signal is used to wake up a first cell, wherein the uplink wake-up signal carries first indication information, wherein the first indication information indicates the expected period of the synchronization broadcast block of the first cell and / or the beam of the synchronization broadcast block; and monitoring the synchronization broadcast block and / or system information block of the first cell.

27. The device according to claim 26, characterized in that The uplink wake-up signal also carries second indication information, and the second indication information is used to indicate at least one of the following: the second cell expected to be awakened, whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold, whether the path loss of the terminal device is greater than or equal to the path loss threshold, or whether the terminal device is a reduced capability device.

28. The device according to claim 27, characterized in that The transceiver unit is used to send the uplink wake-up signal according to the configuration information of the uplink wake-up signal when sending the uplink wake-up signal.

29. The device according to claim 28, characterized in that The configuration information of the uplink wake-up signal includes at least one of the following: waveform information of the uplink wake-up signal, the number of bits carried by a symbol occupied by the uplink wake-up signal, time domain resource information of the uplink wake-up signal, frequency domain resource information of the uplink wake-up signal, the maximum number of transmission times of the uplink wake-up signal, the power climbing step of the uplink wake-up signal, the cache threshold, or the path loss threshold.

30. The device according to claim 29, characterized in that The waveform information of the uplink wake-up signal indicates that the waveform of the uplink wake-up signal is any one of the following: a coordinated waveform of OOK and OFDM, the multi-carrier amplitude shift keying ASK, multi-carrier frequency shift keying FSK, or OFDM.

31. The device according to any one of claims 28 to 30, characterized in that The configuration information of the uplink wake-up signal also includes first information, which includes at least one of the following information: access identifier, network slice group identifier, network slice identifier, emergency service identifier, data wireless bearer identifier, and logical channel identifier; the first information is used by the terminal device to determine whether to send the uplink wake-up signal.

32. The device according to any one of claims 28 to 31, characterized in that The configuration information of the uplink wake-up signal is carried by one of the following: a broadcast message, a downlink low-power synchronization signal, a downlink wake-up signal or RRC signaling.

33. The device according to any one of claims 26 to 32, characterized in that The transceiver unit is configured to, after sending the uplink wake-up signal, send the random access request message to the first cell according to the monitored synchronization broadcast block and / or system information block of the first cell.

34. The device according to any one of claims 26 to 32, characterized in that The transceiver unit is used to send the random access request message to the first cell after sending the uplink wake-up signal, according to the first condition determined by the processing unit to be satisfied; wherein the first condition includes determining that the maximum number of times the uplink wake-up signal is sent is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored; and / or, starting the timing from the first time the uplink wake-up signal is sent, determining that a first preset time length is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored.

35. The device according to any one of claims 26 to 32, characterized in that The transceiver unit is used to send the random access request message to the second cell after sending the uplink wake-up signal, according to the first condition determined by the processing unit to be satisfied; wherein the first condition includes determining that the maximum number of times the uplink wake-up signal is sent is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored; and / or, starting the timing from the first time the uplink wake-up signal is sent, determining that the first preset time length is reached, and the synchronization broadcast block and / or system information block of the first cell is not monitored; after the random access process is completed, sending the identifier of the first cell to the second cell.

36. The device according to claim 35, characterized in that The second cell is a cell reselected by the terminal device or a designated cell.

37. The device according to any one of claims 34 to 36, characterized in that The transceiver unit is used to receive third indication information from the first cell or the third cell, where the third indication information indicates at least one of the following: time-frequency resource information occupied by the random access request message, the root sequence index of the random access request message, the random access sequence index, or the beam association configuration of the downlink low-power synchronization signal and the random access sequence.

38. The device according to any one of claims 26 to 32, characterized in that The transceiver unit is used to receive a random access response message from the first cell according to the monitored synchronization broadcast block and / or system information block of the first cell after sending the uplink wake-up signal, and the random access response message includes information of the uplink wake-up signal.

39. The device according to claim 38, characterized in that The information of the uplink wake-up signal includes all or part of the information carried in the uplink wake-up signal sent by the terminal device, or the sequence index of the uplink wake-up signal.

40. A communication device, characterized in that: The device includes a processing unit and a transceiver unit, wherein the processing unit calls the transceiver unit to receive the uplink wake-up signal, the uplink wake-up signal is used to wake up the first cell, the uplink wake-up signal carries first indication information, the first indication information indicates the expected period of the synchronization broadcast block of the first cell and / or the beam of the synchronization broadcast block; broadcast the synchronization broadcast block and / or system information block of the first cell.

41. The device according to claim 40, characterized in that The transceiver unit is configured to receive the uplink wake-up signal through the auxiliary receiver when receiving the uplink wake-up signal.

42. The device according to claim 40 or 41, characterized in that The processing unit is configured to determine a period of the synchronization broadcast block and / or an index of the synchronization broadcast block according to the first indication information before broadcasting the synchronization broadcast block according to the uplink wake-up signal.

43. The device according to any one of claims 40 to 42, characterized in that The uplink wake-up signal also carries second indication information, and the second indication information is used to indicate at least one of the following: the second cell expected to be awakened, whether the uplink data cache size of the terminal device is greater than or equal to the cache threshold, whether the path loss of the terminal device is greater than or equal to the path loss threshold, or whether the terminal device is a reduced capability device.

44. The device according to claim 43, characterized in that The transceiver unit is used to send configuration information of the uplink wake-up signal before sending the uplink wake-up signal.

45. The device according to claim 44, characterized in that The configuration information of the uplink wake-up signal includes at least one of the following: waveform information of the uplink wake-up signal, the number of bits carried by a symbol occupied by the uplink wake-up signal, time domain resource information of the uplink wake-up signal, frequency domain resource information of the uplink wake-up signal, the maximum number of transmission times of the uplink wake-up signal, the power climbing step of the uplink wake-up signal, the cache threshold, or the path loss threshold.

46. ​​The device according to claim 44, characterized in that The waveform information of the uplink wake-up signal indicates that the waveform of the uplink wake-up signal is any one of the following: a coordinated waveform of OOK and OFDM, the multi-carrier ASK, multi-carrier FSK, or OFDM.

47. The device according to any one of claims 44 to 46, characterized in that The configuration information of the uplink wake-up signal also includes first information, which includes at least one of the following information: access identifier, network slice group identifier, network slice identifier, emergency service identifier, data wireless bearer identifier, and logical channel identifier; the first information is used by the terminal device to determine whether to send the uplink wake-up signal.

48. The device according to any one of claims 44 to 47, characterized in that The configuration information of the uplink wake-up signal is carried by one of the following: a broadcast message, a downlink low-power synchronization signal, a downlink wake-up signal or RRC signaling.

49. The device according to any one of claims 40 to 48, characterized in that The transceiver unit is used to send a random access response message to the terminal device after broadcasting the synchronization broadcast block and / or system information block of the first cell according to the uplink wake-up signal, and the random access response message includes information of the uplink wake-up signal.

50. The device according to claim 49, characterized in that The information of the uplink wake-up signal includes all or part of the information carried in the uplink wake-up signal sent by the terminal device, or the sequence index of the uplink wake-up signal.

51. A communication device, characterized in that: include: One or more processors and one or more memories; wherein the one or more memories store one or more programs, and when the programs are executed by the one or more processors, the device executes the method as described in any one of claims 1-14, or executes the method as described in any one of claims 15-25.

52. A readable storage medium, characterized in that: The readable storage medium includes a program, and when the program is executed on a device, the device executes the method according to any one of claims 1 to 14, or executes the method according to any one of claims 15 to 25.

53. A computer program product, characterized in that The computer program product comprises a computer program or instructions, and when the computer program or instructions are executed by a communication device, the method according to any one of claims 1 to 14 is implemented, or the method according to any one of claims 15 to 25 is implemented.

54. A computer program, characterized in that When the computer program is executed on a computer, the computer is enabled to execute the method according to any one of claims 1 to 14, or execute the method according to any one of claims 15 to 25.

55. A communication device, characterized in that: The device includes: an interface circuit; the interface circuit is used to provide input and / or output of programs or instructions to at least one processor; the at least one processor is used to execute the program or instructions so that the communication device can implement the method as described in any one of claims 1-14, or implement the method as described in any one of claims 15-25.

56. The device according to claim 55, characterized in that The communication device comprises the at least one memory, and the at least one memory is used to store the program or instruction.

57. A chip system, characterized in that: The chip system includes at least one chip and a memory, and the at least one chip is used to read and execute a program stored in the memory to implement the method as described in any one of claims 1 to 14, or to implement the method as described in any one of claims 15 to 25.

58. A communication system, characterized in that: The system includes at least one terminal device and a network device, the terminal executes the method according to any one of claims 1 to 14, and the network device executes the method according to any one of claims 15 to 25.

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