Wireless communication method, terminal device and network device

Abstract

Provided are a wireless communication method, a terminal device and a network device. The wireless communication method comprises: a terminal device detecting a first signal transmitted by a network device corresponding to a first cell, wherein the first signal is used for one or more of the following: cell identification, cell measurement, cell camping and cell access; the detection of the first signal is related to the transmission mode of the first signal, or the first signal is detected on the basis of a first parameter; and the first parameter comprises one or more of the following: a detection period of the first signal and the length of a detection occasion of the first signal.

Description

Method, terminal device and network device for wireless communication TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and more particularly, to a method, a terminal device and a network device for wireless communication. BACKGROUND

[0002] In some communication systems (such as a new radio (NR) system), a terminal device needs to detect a first signal sent by a cell to perform cell identification / measurement / residence / access. For a terminal device performing initial access, the terminal device is not synchronized with the cell, and therefore, the terminal device needs to continuously search for the first signal, which results in high power consumption of the terminal device.

[0003] SUMMARY

[0004] The present application provides a method, a terminal device and a network device for wireless communication. Each aspect of the present application is described below.

[0005] In a first aspect, a method for wireless communication is provided, comprising: detecting, by a terminal device, a first signal sent by a network device corresponding to a first cell, the first signal being used for one or more of the following: cell identification, cell measurement, cell residence, and cell access; wherein the detection of the first signal is related to a sending mode of the first signal; or the first signal is detected based on first parameters, the first parameters comprising one or more of the following: a detection period of the first signal; a length of a detection occasion of the first signal.

[0006] In a second aspect, a method for wireless communication is provided, comprising: sending, by a network device corresponding to a first cell, a first signal to a terminal device, the first signal being used for one or more of the following: cell identification, cell measurement, cell residence, and cell access; wherein the sending of the first signal is related to a detection mode of the first signal; or the first signal is sent based on second parameters, the second parameters comprising one or more of the following: a sending period of the first signal; a duration of the first signal; and a number of the first signals sent in one sending period.

[0007] In a third aspect, a terminal device is provided, comprising: a detection module configured to detect a first signal sent by a network device corresponding to a first cell, the first signal being used for one or more of the following: cell identification, cell measurement, cell residence, and cell access; wherein the detection of the first signal is related to a sending mode of the first signal; or the first signal is detected based on first parameters, the first parameters comprising one or more of the following: a detection period of the first signal; a length of a detection occasion of the first signal.

[0008] In a fourth aspect, a network device is provided, the network device being a network device corresponding to a first cell, the network device comprising: a sending module configured to send a first signal to a terminal device, the first signal being used for one or more of the following: cell identification, cell measurement, cell camping, and cell access; wherein the sending of the first signal is related to a detection manner of the first signal; or the first signal is sent based on a second parameter, the second parameter comprising one or more of the following: a sending period of the first signal; a duration of the first signal; and a number of the first signals sent in one sending period.

[0009] In a fifth aspect, a terminal device is provided, comprising a processor, a memory, and a communication interface, the memory being configured to store one or more computer programs, and the processor being configured to invoke the computer programs in the memory to cause the terminal device to perform some or all of the steps in the method of the first aspect.

[0010] In a sixth aspect, a network device is provided, comprising a processor, a memory, and a communication interface, the memory being configured to store one or more computer programs, and the processor being configured to invoke the computer programs in the memory to cause the network device to perform some or all of the steps in the method of the second aspect.

[0011] In a seventh aspect, an embodiment of the present application provides a communication system, which comprises the terminal device and / or the network device described above. In another possible design, the system can further comprise other devices interacting with the terminal device or the network device in the solutions provided by the embodiments of the present application.

[0012] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program causes a computer to perform some or all of the steps in the methods of the aspects described above.

[0013] In a ninth aspect, an embodiment of the present application provides a computer program product, which comprises a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to perform some or all of the steps in the methods of the aspects described above. In some implementations, the computer program product can be a software installation package.

[0014] In a tenth aspect, an embodiment of the present application provides a chip, which comprises a memory and a processor, and the processor can invoke and run a computer program from the memory to implement some or all of the steps described in the methods of the aspects described above.

[0015] In an embodiment of the present application, the terminal device can detect the first signal based on a transmission mode of the first signal, or can periodically detect the first signal based on the first parameter. In this way, the terminal device can discontinuously detect the first signal, which is conducive to saving energy of the terminal device in the process of detecting the first signal. BRIEF DESCRIPTION OF DRAWINGS

[0016] FIG. 1 is an example of a system architecture of a wireless communication system to which embodiments of the present application can be applied.

[0017] FIG. 2 is a schematic diagram of a process of cell search.

[0018] FIG. 3 is a schematic diagram of transmitting a synchronization signal block (SSB) according to an embodiment of the present application.

[0019] FIG. 4 is a flowchart of a method of wireless communication according to an embodiment of the present application.

[0020] FIG. 5 is an example of a network device transmitting a first signal according to an embodiment of the present application.

[0021] FIG. 6 is an example of a terminal device detecting a first signal according to an embodiment of the present application.

[0022] FIG. 7 is an example of a relationship between a length of a detection occasion of a first signal and a plurality of signals included in the first signal.

[0023] FIG. 8 is an example of a first signal according to an embodiment of the present application.

[0024] FIG. 9 is an example of a first signal according to another embodiment of the present application.

[0025] FIG. 10 is an example of a terminal device detecting a first signal according to another embodiment of the present application.

[0026] FIG. 11 is a flowchart of a method of wireless communication according to another embodiment of the present application.

[0027] FIG. 12 is a schematic diagram of a structure of a terminal device according to an embodiment of the present application.

[0028] FIG. 13 is a schematic diagram of a structure of a network device according to an embodiment of the present application.

[0029] FIG. 14 is a schematic diagram of a structure of a communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] Communication system architecture

[0031] FIG. 1 is an example diagram of a system architecture of a wireless communication system 100 to which embodiments of the present application can be applied. The wireless communication system 100 can include a network device 110 and a terminal device 120. The network device 110 can be a device that communicates with the terminal device 120. The network device 110 can provide a communication coverage for a specific geographic area and can communicate with the terminal device 120 located in the coverage area.

[0032] FIG. 1 exemplarily shows one network device and two terminal devices. Alternatively, the wireless communication system 100 can include a plurality of network devices and each network device can include other number of terminal devices within its coverage, which is not limited in the embodiments of the present application.

[0033] Alternatively, the wireless communication system 100 can further include a network controller, a mobility management entity, and other network entities, which are not limited in the embodiments of the present application.

[0034] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a 5th generation (5G) system or new radio (NR), a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD), and the like. The technical solutions provided by the present application can also be applied to future communication systems, such as a 6th generation mobile communication system, a satellite communication system, and the like.

[0035] The terminal device in the embodiments of the present application can also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station (MS), a mobile terminal (MT), a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user apparatus. The terminal device in the embodiments of the present application can refer to a device that provides voice and / or data connectivity for a user, and can be used to connect people, things and machines, such as handheld devices with wireless connection functions, vehicle-mounted devices, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer (Pad), a notebook computer, a palm computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity, which provides sidelink signals between UEs in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and the smart home device communicate with each other without relaying the communication signals through the base station.

[0036] The network device in the embodiments of the present application can be a device for communicating with a terminal device, which can also be referred to as an access network device or a radio access network device, such as a network device, which can be a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) that accesses a terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, transmitting and receiving point (TRP), transmitting point (TP), master station MeNB, auxiliary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, modem or chip for being arranged in the foregoing device or apparatus. The base station can also be a mobile switching center and a device that undertakes the function of a base station in device-to-device (D2D), vehicle-to-everything (V2X), machine-to-machine (M2M) communication, network side device in 6G network, device that undertakes the function of a base station in future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0037] The base station can be fixed or mobile. For example, a helicopter or a drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, the helicopter or the drone can be configured to act as a device that communicates with another base station.

[0038] In some deployments, the network device in the embodiments of the present application can refer to a CU or a DU, or the network device includes a CU and a DU. The gNB can also include an AAU.

[0039] The network device and the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface; can also be deployed on airplanes, balloons and satellites in the air. The scenarios in which the network device and the terminal device are located are not limited in the embodiments of the present application.

[0040] It should be understood that all or part of the functions of the communication device in the present application can also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (such as a cloud platform).

[0041] NES

[0042] With the development of communication technology, the wireless communication system has great improvement in key indicators such as transmission rate, transmission delay, connection scale, and can support more rich service scenarios and applications. Taking the 5G system as an example, as 5G is popularized in various industries and geographical areas, the 5G system is processing more advanced services and applications (such as extended reality) that require extremely high data rates, so the 5G network becomes denser and needs to use more antennas, wider frequency bands and more frequency bands. However, the continuous development of wireless communication systems also brings new problems to operators, such as energy consumption problems.

[0043] At present, energy consumption has become an important part of the operating expenses (OPEX) of operators. According to the report of the global system for mobile communications association (GSMA), the energy cost of mobile networks accounts for about 23% of the total cost of operators. Among them, most of the energy consumption comes from the radio access network, especially the AAU, while the data center and the optical fiber transmission only account for a small share.

[0044] The energy consumption of the mobile network can be divided into two categories, dynamic part energy consumption and static part energy consumption. Among them, the dynamic part energy consumption may refer to the consumption when data is sent / received, for example; the static part energy consumption may refer to the consumption generated to maintain the necessary operation of the wireless access device, even if there is no continuous data sending / receiving at this time.

[0045] It can be seen that the environmental impact of the wireless communication system needs to be controlled. Based on this, the related technology needs to develop new solutions to realize network energy saving, so as to realize the sustainable development of the environment, reduce the environmental impact (such as reducing greenhouse gas emissions) and save the operating cost through network energy saving.

[0046] The related research on network energy saving can include network energy saving techniques and the related research on the impact of network energy saving techniques on legacy terminal devices and specifications. Currently, network energy saving techniques can achieve network energy saving from one or more aspects of time domain, frequency domain, spatial domain, and power domain, or in other words, network energy saving techniques can be classified into different network energy saving techniques according to time domain, frequency domain, spatial domain, and power domain. Time domain and frequency domain related network energy saving techniques mainly aim to reduce the energy consumption of dynamic parts by trying to turn off more symbols on one or more carriers to achieve micro-sleep of network devices (such as base stations). In some implementations, in the case of energy consumption of network devices in the static part, time domain and frequency domain related network energy saving techniques can reduce the energy consumption of the static part by expanding the interval of signals that need to be transmitted to achieve light / deep sleep of network devices. Spatial domain and power domain related network energy saving techniques mainly aim to reduce the power consumption of transmitter-receiver (TRX) links and power amplifiers (PAs) by trying one or more of the following schemes: turning off more spatial elements, reducing transmission power, reducing power spectral density, and improving the efficiency of PAs.

[0047] The 3rd generation partner project (3GPP) introduces some work items to study network energy saving techniques. Taking the 3GPP release-18 (Rel-18) as an example, the network energy saving techniques of Rel-18 mainly target the scenario of specific signals and channels between terminal devices and network devices when the terminal devices are in the radio resource control (RRC) connected state and the network is low load. Exemplarily, the network energy saving techniques involved in Rel-18 mainly include the following aspects: operation of SSB-free secondary cells (SCells), enhancement of cell discontinuous transmission (DTX) / discontinuous reception (DRX) mechanisms, inter-node information exchange for cell DTX / DRX, spatial and power domain related network energy saving techniques, mechanisms to prevent legacy terminal devices from camping on network energy saving cells, enhancement of connection establishment optimization procedures, inter-node beam activation, and enhancement of paging limited to a limited area, and core requirements of radio resource management (RRM) / radio frequency (RF) corresponding to network energy saving.

[0048] The operation of SCell without SSB mainly targets scenarios of cross-band carrier aggregation (CA) and co-sited cells in frequency range 1 (FR1).

[0049] The enhancement of cell DTX / DRX mechanism mainly targets the enhancement of alignment of cell DTX / DRX and DRX of terminal device in RRC connected mode.

[0050] The network energy saving techniques in spatial and power domains mainly aim to achieve efficient adaptation of spatial elements and power offset values between physical downlink shared channel (PDSCH) and channel state information-reference signal (CSI-RS).

[0051] Rel-18 involves network energy saving techniques aimed at improving the energy efficiency of 5G networks, particularly in RRC connected state and low load conditions, by optimizing the use of signals and channels to improve energy management of cells and reduce unnecessary energy consumption. Through these measures, operators can reduce operating costs while reducing the impact on the environment.

[0052] 3GPP Rel-19 enhances network energy saving techniques, mainly including the following aspects: procedures and signaling for on-demand activation of SSB of SCell, procedures and signaling for on-demand reception of system information block 1 (SIB1), and specification of adaptation of common signal / channel transmission.

[0053] The procedures and signaling for on-demand activation of SSB of SCell mainly target terminal devices configured with CA and in RRC connected state. The methods for on-demand activation of SSB of SCell include one or more of the following: sending a wake-up signal through existing uplink signals / channels of the terminal device, through backhaul cell on / off indication information, and through SCell activation / deactivation signaling. The on-demand activated SSB can be used for one or more of the following: time / frequency synchronization of SCell, layer 1 / layer 3 measurement, and SCell activation.

[0054] The procedures and signaling for on-demand reception of SIB1 mainly target terminal devices in RRC idle state or RRC inactive state. The methods for on-demand reception of SIB1 include one or more of the following: sending a wake-up signal using existing signals / channels, and providing a configuration of the wake-up signal to the terminal device through information exchange between network devices.

[0055] The adaptation of the designated common signal / channel transmission can include one or more of the following: adaptation of SSBs in time domain (e.g., adaptation period), adaptation of physical random access channel (PRACH) in time domain, adaptation of PRACH in spatial domain (e.g., non-uniform PRACH resources per SSB, and designate the PRACH resources when it is found to be beneficial), and enhancement of paging occasions to limit paging occasions in time domain.

[0056] Cell search

[0057] The process of cell search refers to the key step of a terminal device searching for and accessing a suitable serving cell in a network when the terminal device is powered on or needs to re-establish a connection. The following takes the NR system as an example to introduce the process of cell search in combination with FIG. 2.

[0058] FIG. 2 is a schematic diagram of the process of cell search. The process shown in FIG. 2 can include steps S210 to S270.

[0059] In step S210, the terminal device performs frequency tuning. The terminal device can adjust to a specific frequency according to a synchronization raster of a designated frequency band to attempt to detect an SSB on the frequency raster.

[0060] In step S220, the terminal device detects a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). The PSS and the SSS have a fixed position in the time-frequency resources of one SSB. By detecting the PSS and the SSS, the terminal device can obtain symbol synchronization and frame synchronization with the network device, and obtain the physical cell identity (PCI) of the network device.

[0061] In step S230, the terminal device decodes a physical broadcast channel (PBCH). After the terminal device successfully synchronizes with the network device, the terminal device can decode the PBCH using the information provided by the PSS and the SSS. The PBCH carries a master information block (MIB). The terminal device can obtain the MIB by decoding the PBCH. The MIB carries key parameters required for decoding other system information.

[0062] At step S240, the terminal device acquires the configuration of SIB1. The terminal device can determine the relevant configuration of the physical downlink control channel (PDCCH) scheduling SIB1 according to the control resource set 0 (CORESET 0) and search space 0 in the MIB.

[0063] At step S250, the terminal device blindly detects the downlink control information (DCI) and acquires DCI format 1_0. The terminal device can blindly detect DCI format 1_0 in the search space indicated by the MIB, where DCI format 1_0 is the DCI used to schedule SIB1. Once DCI format 1_0 is detected, the terminal device can further verify and acquire the specific content of DCI format 1_0 using the system information-radio network temporary identifier (SI-RNTI).

[0064] At step S260, the terminal device detects and decodes SIB1 on the PDSCH. Through the information provided in DCI format 1_0, the terminal device can find and decode SIB1 carried on the PDSCH.

[0065] At step S270, the terminal device decodes other SIBs. SIB1 contains the key parameters required to decode other SIBs, and the terminal device can decode other SIBs through the information provided in SIB1 to obtain complete network configuration and access information.

[0066] After the terminal device successfully completes cell search through the above steps, it can continue to perform cell access and start data transmission and communication.

[0067] In the NR system, for terminal devices in the RRC connected state, the NES technology is mainly applied to SCell under CA configuration; for terminal devices in the RRC idle state or the RRC inactive state, the NES technology is mainly applied to cells for cell reselection. That is, the NES cell cannot work independently from the normal cell. The terminal device needs to rely on the normal cell to meet the mobility requirements or obtain the relevant configuration information of the NES cell, such as the configuration information of the wake-up signal. The wake-up signal is used to trigger the transmission of on-demand SSB or on-demand SIB1 on the NES cell. The NR system is designed in this way to ensure backward compatibility and avoid affecting the mobility and cell search of traditional terminal devices.

[0068] However, there can be a need for terminal devices to perform cell search and / or initial access through the NES cell in the future, and how to meet this need also becomes a problem to be solved. In other words, the NES cell needs to be considered as a primary cell (PCell) or the NES cell can be used for cell selection or initial access in the future.

[0069] discovery signal

[0070] The discovery signal is a signal transmitted by a cell for cell identification, measurement, camping, and access. In some implementations, the discovery signal can be an SSB. For example, in an NR system, the discovery signal can be an SSB. The discovery signal is described below as an SSB.

[0071] In some implementations, the SSB of a cell can be transmitted periodically. The embodiments of the present application do not limit the period of the SSB of a cell, and exemplary periods of the SSB can include 5 ms, 10 ms, 20 ms, 40 ms, 80 ms, 160 ms, etc. In some implementations, the period of the SSB can be configured by a high-layer parameter, for example, the period of the SSB can be configured by a high-layer parameter SSB-timing, including 5 ms, 10 ms, 20 ms, 40 ms, 80 ms, 160 ms, etc. In some implementations, when a terminal device is not configured with the period of the SSB, the terminal device can receive (or detect) the SSB with a period of 5 ms. In some implementations, for a terminal device performing initial access, the terminal device assumes to receive the SSB with a period of 20 ms since there is no high-layer configuration parameter.

[0072] In some implementations, in each period, the duration of the SSB (i.e., the transmission window of the SSB) is less than or equal to the period of the SSB. For example, assuming that the period of the SSB is 20 ms, in each period, the duration of the SSB can be 5 ms or 10 ms, etc. In some implementations, in the duration of the SSB, the SSB can be transmitted in a predefined pattern.

[0073] In some implementations, the SSB of a cell can be transmitted in a beam sweeping manner. For example, in each period, a cell can transmit one SSB burst. One SSB burst can include multiple SSBs, which can correspond to different beams. As shown in FIG. 3, a cell can transmit the SSB with a period of 20 ms, and in each period, the duration of the SSB is 5 ms. Moreover, in each period, the cell transmits one SSB burst, and each SSB burst includes 8 SSBs.

[0074] It should be understood that the periodic transmission of the discovery signal by the cell is not conducive to network energy saving. Therefore, as a possible implementation manner, the cell can turn off the transmission of the discovery signal to save energy. However, this can cause the terminal device to be unable to determine whether there is a cell in a frequency band, and the terminal device can only attempt to wake up the cell to transmit the discovery signal through blind transmission of an uplink wake up signal (WUS), which is not conducive to the energy saving of the terminal device. In addition, the terminal device cannot perform mobility measurement on the cell in the network energy saving state, which affects the mobility of the terminal device. As another possible implementation manner, the cell can increase the transmission period of the discovery signal to save energy. However, for the terminal device in initial access, the terminal device is not synchronized with the cell, and therefore, the terminal device needs to continuously search for the discovery signal, which is not conducive to the energy saving of the terminal device in the process of searching for the discovery signal.

[0075] It should be understood that, for the terminal device in initial access, whether the terminal device accesses the NES cell or the cell in the normal state, the terminal device needs to continuously search for the discovery signal, which is not conducive to the process of searching for the discovery signal by the terminal device.

[0076] To solve the above problems, the embodiments of the present application provide a wireless communication method, a terminal device and a network device, which are conducive to the discontinuous detection of the discovery signal (i.e., the first signal in the following) by the terminal device, thereby being conducive to the energy saving of the terminal device in the process of detecting the discovery signal. The method embodiments of the present application are introduced as follows.

[0077] FIG. 4 is a flow diagram of a wireless communication method provided by an embodiment of the present application. The method shown in FIG. 4 is introduced from the perspective of the interaction between a terminal device and a network device, for example, the terminal device 120 and the network device 110 shown in FIG. 1. The method shown in FIG. 4 includes step S410, which is introduced as follows.

[0078] In step S410, the network device corresponding to the first cell transmits the first signal to the terminal device. Correspondingly, the terminal device detects the first signal transmitted by the network device corresponding to the first cell.

[0079] In some embodiments, the first cell can belong to one or more of the following: a primary cell, a cell for cell selection, a cell for cell access. As an example, the first cell can be a primary cell. As another example, for a terminal device in an RRC idle state or an RRC inactive state, the first cell can be a cell for cell selection (i.e., the first cell can be used for cell selection). As yet another example, for a terminal device requiring initial access, the first cell can be a cell for cell access (i.e., the first cell can be used for cell access or cell camping). However, embodiments of the present application are not limited thereto, for example, the first cell can also be used for cell reselection or as a secondary cell, etc.

[0080] In some embodiments, the first cell is an NES cell. For example, the NES cell can belong to one or more of the following: a primary cell, a cell for cell selection, a cell for cell access. Alternatively, the NES cell can also be used for cell reselection or as a secondary cell, etc.

[0081] In some embodiments, when the first cell is an NES cell, the first cell can not transmit (or referred to as not broadcast, not indicate) a common signal. For example, the first cell can not transmit a synchronization signal and / or system information. It should be noted that the “not transmit” mentioned in embodiments of the present application can mean “not actively transmit”. For example, the first cell can not actively transmit a common signal. Alternatively, the first cell can not actively transmit a synchronization signal and / or system information.

[0082] In some embodiments, the first cell not transmitting a common signal (such as a synchronization signal and / or system information) can be understood or replaced as: the common signal of the first cell is transmitted on demand. That is, the first cell can transmit a common signal at the request of a terminal device.

[0083] Embodiments of the present application do not limit the synchronization signal, as long as it is used for terminal device to synchronize with the first cell. For example, the synchronization signal can be SSB. Of course, the synchronization signal can also be other signals used for synchronization with the first cell, for example, the synchronization signal can be PSS and / or SSS, or the synchronization signal can be a signal with the same or similar function as SSB in future communication systems, etc.

[0084] Embodiments of the present application do not limit the system information, for example, the system information can include one or more of the following: MIB, SIB. As an example, the system information can include MIB. As another example, the system information can include SIB, such as SIB1 and / or other SIB. As yet another example, the system information can include MIB and SIB. However, embodiments of the present application are not limited thereto, and the system information can be information with the same or similar function as MIB and / or SIB in future communication systems, etc.

[0085] In some embodiments, the first cell is a cell in the NES state. In other words, in some embodiments, the first cell can include two states: a normal state, and an NES state.

[0086] When the first cell is in the normal state, the first cell (i.e., the network device corresponding to the first cell) can transmit common signals, such as transmitting synchronization signals, system information, broadcast messages, and the like. In other words, when the first cell is in the normal state, the first cell can actively transmit (e.g., broadcast) common signals. In this way, a terminal device can identify the first cell and obtain system information based on the common signals, thereby camping on or accessing the first cell. Taking a 5G system as an example, when the first cell is in the normal state, the first cell can transmit a cell-defining synchronization signal block (cell-defining SSB). The PBCH in the SSB carries a broadcast message, from which resource information of a PDCCH scheduling a SIB1 can be obtained, and thus the PDCCH can be detected based on the resource information to receive the SIB1.

[0087] When the first cell is in the NES state, the first cell (i.e., the network device corresponding to the first cell) can reduce transmission of common signals, such as reducing transmission of synchronization signals and system information. In this case, some common signals can be transmitted in an on-demand manner, i.e., based on a demand of a terminal device. In the absence of a demand from a terminal device, the first cell does not transmit these common signals, thereby achieving network energy saving. As an example, system information (e.g., SIB1) can be transmitted in an on-demand manner, and a terminal device can trigger the first cell to transmit the system information through the first signal. As another example, synchronization signals (e.g., SSBs) can be transmitted in an on-demand manner, and a terminal device can trigger the first cell to transmit the synchronization signals through the first signal. As yet another example, system information and synchronization signals can be transmitted in an on-demand manner, and a terminal device can trigger the first cell to transmit the system information and the synchronization signals through the first signal.

[0088] That is, in the embodiments of the present application, the first cell can be a cell in the NES state, but it can still serve as an accessible cell, and when needed, the first cell can have the function of a non-NES cell (i.e., in the normal state). However, the embodiments of the present application are not limited thereto, and the first cell can also be a normal cell (or a non-NES cell), or the first cell can also be a cell in the normal state.

[0089] In the embodiments of the present application, the first signal can be used for one or more of the following: cell identification, cell measurement, cell camping, cell access. Therefore, the first signal can be referred to or understood as a discovery signal. As an example, the first signal can be used for cell identification. As another example, the first signal can be used for cell measurement. As yet another example, the first signal can be used for cell camping. As yet another example, the first signal can be used for cell access. As yet another example, the first signal can be used for cell identification and cell access. As yet another example, the first signal can be used for cell camping and cell access.

[0090] The embodiments of the present application do not make specific limitations to the first signal, as long as it can be used for cell identification / measurement / camping / access. Exemplarily, the first signal can include one or more of the following: synchronization signal, reference signal, SSB. As an example, the first signal can include a synchronization signal, such as PSS, SSS, etc. As another example, the first signal can include a reference signal, such as CRS, etc. As yet another example, the first signal can include an SSB. Of course, the embodiments of the present application are not limited thereto, for example, the first signal can include a synchronization signal, a reference signal, etc. in a future communication system, or the first signal can include a signal having the same function or similar function as the SSB in a future communication system.

[0091] In some embodiments, one or more signals can be included in the first signal. Therefore, in some embodiments, the first signal can also be referred to or understood as a signal set (or in other words, the first signal can be replaced by a first signal set, a first signal burst, etc.). For example, the first signal can be an SSB burst, and one SSB burst can include one or more SSBs.

[0092] In some embodiments, the multiple signals included in the first signal can correspond to different beams to implement beam sweeping.

[0093] In some embodiments, the first signal is a periodically transmitted signal. For example, the first signal can be a signal transmitted with a period of 40 ms, 60 ms, 120 ms, 240 ms, etc.

[0094] In some embodiments, the first signal is transmitted by the network device in an energy-saving manner. Taking a first cell as an example, the first cell is a NES cell or a cell in a NES state, the transmission period of the first signal in the first cell can be greater than the transmission period of the first signal in a non-NES cell or a cell in a normal state. Taking a terminal device initially accessing as an example, the transmission period of the first signal in the first cell can be greater than 20 ms.

[0095] In some embodiments, the network device can send multiple first signals in each period of the first signals, i.e., the network device can send multiple signal sets in each period. For example, the first signal can be a signal sent by the network device with a larger period, but in each period, the network device can send multiple first signals. In other words, the network device can send multiple first signals in each period in a concentrated manner, and not send the first signal at other times in the period, and enter a sleep state.

[0096] For ease of understanding, an example of sending a first signal is given below in connection with FIG. 5. As shown in FIG. 5, in a sending period (e.g., 80 ms) of the first signal, the network device can send 3 first signals, each first signal has a duration of 5 ms, and each first signal includes 8 signals.

[0097] That is, in the embodiments of the present application, the network device can send the first signal in a non-uniform manner, i.e., increase the sending period of the first signal, and send the first signal multiple times in each sending period. Compared with periodically sending one first signal at a time, sending multiple first signals in a period and increasing the sending period can reduce the power consumption of the cell (e.g., NES cell or cell in NES state) due to frequent switching of the transceiver, and achieve network energy saving.

[0098] In some embodiments, the first signal is sent in a non-synchronous manner. The first signal sent in a non-synchronous manner can be understood as that the first signal is sent by the network device without knowing the timing information of the terminal device, or the first signal is sent by the network device of the first cell without the terminal device knowing the timing information of the first cell.

[0099] In this case, since the terminal device has not yet achieved synchronization with the network device, the timing information of the first signal sent by the network device is unknown to the terminal device, and the terminal device needs to continuously detect the first signal, which is very disadvantageous for energy saving of the process of detecting the first signal by the terminal device.

[0100] Based on this, the embodiments of the present application provide a sending manner of the first signal and / or a detection manner of the first signal, which is advantageous to ensure that the terminal device can discontinuously detect the first signal, thereby being advantageous to reduce the complexity and power consumption of the terminal device in detecting the first signal, and achieve energy saving of the terminal device.

[0101] In some embodiments, based on the manner in which the terminal device detects the first signal, the network device can determine the transmission manner of the first signal based on the manner in which the terminal device detects the first signal. That is, the transmission manner of the first signal is related to the manner in which the terminal device detects the first signal. In this way, the embodiments of the present application facilitate ensuring that the terminal device can discontinuously detect the first signal, thereby facilitating reducing the complexity and power consumption of the terminal device in detecting the first signal.

[0102] In some embodiments, the transmission manner of the first signal being related to the manner in which the terminal device detects the first signal can include that the transmission manner of the first signal is determined based on the manner in which the terminal device detects the first signal.

[0103] In some embodiments, the transmission manner of the first signal being related to the manner in which the terminal device detects the first signal and / or the transmission manner of the first signal being determined based on the manner in which the terminal device detects the first signal can include that the transmission manner of the first signal is determined based on a first parameter of the terminal device detecting the first signal.

[0104] In some embodiments, the first parameter is predefined or preconfigured, such as predefined by a protocol.

[0105] The embodiments of the present application do not limit the configuration granularity of the first parameter. For example, the first parameter can be configured based on one or more of the following granularities: carrier, frequency band, frequency band combination, frequency range (FR).

[0106] As an example, the first parameter can be configured based on FR. For example, the first parameter corresponding to FR1 is different from the first parameter corresponding to FR2.

[0107] As another example, the first parameter can be configured based on carrier. One or more carriers can correspond to a set of first parameters, that is, different carriers can correspond to different first parameters.

[0108] As yet another example, the first parameter can be configured based on frequency band or frequency band combination. One or more frequency bands (or one or more frequency band combinations) can correspond to a set of first parameters, that is, different frequency bands or frequency band combinations can correspond to different first parameters.

[0109] As yet another example, the first parameter can be configured based on FR and frequency band. For example, different first parameters can be configured for FR1 and FR2, different first parameters can be configured based on frequency band granularity within FR1, different first parameters can be configured based on frequency band granularity within FR2, and the like.

[0110] The first parameter is not limited by embodiments of the present application. For example, the first parameter can include one or more of the following: a detection period of the first signal, a length of a detection occasion of the first signal.

[0111] In some embodiments, the detection period of the first signal is predefined. In some embodiments, the detection period of the first signal can include one or more time units. For example, the detection period of the first signal can include P time units, where P is a positive integer.

[0112] In some embodiments, the detection period of the first signal is related to an RRC state of the terminal device. For example, the detection period of the first signal corresponding to the terminal device in the RRC connected state is different from the detection period of the first signal corresponding to the terminal device in the RRC idle state / RRC inactive state. As an example, the detection period of the first signal corresponding to the terminal device in the RRC connected state can be less than the detection period of the first signal corresponding to the terminal device in the RRC idle state / RRC inactive state. As another example, the detection period of the first signal corresponding to the terminal device in the RRC idle state can be different from the detection period of the first signal corresponding to the terminal device in the RRC inactive state. Of course, embodiments of the present application are not limited thereto, for example, the detection period of the first signal corresponding to the terminal device in the RRC idle state can be the same as the detection period of the first signal corresponding to the terminal device in the RRC inactive state.

[0113] In some embodiments, the length of the detection occasion of the first signal can refer to the length of the time unit contained in the detection occasion of the first signal. Therefore, in some embodiments, the length of the detection occasion of the first signal can also be referred to as the time length of the detection occasion of the first signal.

[0114] In some embodiments, the network device can assume that the first signal is located within one time unit in the time domain, in which case the length of the time unit corresponding to the first signal can refer to the length of the time unit in which the network device assumes the first signal to be located. In some embodiments, the length of the time unit can be predefined (for example, predefined by a protocol), in which case the length of the time unit corresponding to the first signal can refer to the length of the predefined time unit.

[0115] The length of one time unit is not limited in the embodiments of the present application. For example, the length of one time unit can include one or more radio frames. Alternatively, the length of one time unit can include one or more subframes. Alternatively, the length of one time unit can include one or more half frames. Alternatively, the length of one time unit can include one or more slots. Alternatively, the length of one time unit can include one or more symbols. Alternatively, the length of one time unit can include one or more milliseconds. Alternatively, the length of one time unit can include one or more microseconds, etc.

[0116] In some embodiments, the length of the detection occasion of the first signal is predefined.

[0117] In some embodiments, the terminal device can periodically detect the first signal, and in each detection period, the terminal device detects the first signal in a detection occasion with a certain time length, so as to save energy of the network device in detecting the first signal. FIG. 6 shows a possible implementation of the terminal device detecting the first signal. As shown in FIG. 6, the terminal device can detect the first signal with a period P, and in each detection period, the terminal device detects the first signal in a detection occasion with a time length L.

[0118] In some embodiments, in order to ensure that the terminal device can successfully detect the first signal, the first signal sent by the network device needs to meet certain conditions. That is, the first signal sent by the network device needs to meet certain conditions, so that the terminal device can successfully detect the first signal sent by the network device without time synchronization between the terminal device and the network device.

[0119] In some embodiments, the duration of the first signal overlaps with the detection occasion of the first signal, so that the terminal device can successfully detect the first signal sent by the network device without time synchronization between the terminal device and the network device.

[0120] In some embodiments, the duration of the first signal can be related to the manner in which the terminal device detects the first signal, so as to ensure that the duration of the first signal overlaps with the detection occasion of the first signal. For example, the duration of the first signal can be greater than or equal to the detection period of the first signal, so that the duration of the first signal will certainly overlap with at least one detection occasion of the terminal device detecting the first signal.

[0121] In some embodiments, the transmission period of the first signal can be determined based on the detection period of the first signal. For example, the transmission period of the first signal can be determined based on the detection period of the first signal and a time offset. As an example, the transmission period of the first signal can be equal to the detection period of the first signal plus or minus the time offset, i.e., the transmission period of the first signal can be equal to the sum (or difference) of the detection period of the first signal and the time offset. In this way, the relative position of the first signal transmitted by the network device in the current detection period, compared with the relative position of the first signal transmitted by the network device in the last detection period, is shifted forward or backward by a certain time offset. The change of the relative position of the first signal in the detection period is beneficial to make the first signal located in the detection occasion of the terminal device for detecting the first signal, thereby facilitating the first signal to be successfully detected by the terminal device.

[0122] In some embodiments, the time offset is determined based on the length of the duration of the first signal. For example, the time offset can be greater than or equal to the length of the duration of the first signal.

[0123] In some embodiments, the value of the time offset can be equal to N times the length of a time unit, N being a positive integer. However, the embodiments of the present application are not limited thereto, for example, the value of the time offset can be greater than the length of a time unit.

[0124] In some embodiments, based on the manner in which the network device transmits the first signal, the terminal device can determine the detection manner of the first signal based on the manner in which the network device transmits the first signal. That is, the detection of the first signal is related to the transmission manner of the first signal. In this way, the embodiments of the present application are beneficial to ensure that the terminal device can discontinuously detect the first signal, thereby facilitating to reduce the complexity and power consumption of the terminal device for detecting the first signal.

[0125] For example, the network device can periodically transmit the first signal, and in each transmission period, the first signal is transmitted within a duration having a certain time length, so as to achieve energy saving of the network device for transmitting the first signal. On this basis, the terminal device can determine the detection manner of the first signal based on the manner in which the network device transmits the first signal.

[0126] In some embodiments, the detection of the first signal being related to the transmission manner of the first signal can mean that the detection manner of the first signal can be determined based on the manner in which the network device transmits the first signal.

[0127] In some embodiments, the detection of the first signal is related to a manner in which the first signal is transmitted, and / or the manner in which the first signal is detected is determined based on the manner in which the network device transmits the first signal, which can include that the detection of the first signal is determined based on a second parameter in which the network device transmits the first signal.

[0128] Embodiments of the present application do not limit the second parameter. For example, the second parameter can include one or more of the following: a transmission period of the first signal, a duration of the first signal, a number of the first signals transmitted in one transmission period.

[0129] In some embodiments, the transmission period of the first signal is predefined.

[0130] In some embodiments, the duration of the first signal refers to a duration of the first signal in each transmission period. That is, the duration of the first signal can be used to indicate a total transmission time or a total transmission window of the first signal in each transmission period.

[0131] In some embodiments, the duration of the first signal can be understood as a total duration of a plurality of first signals transmitted in one transmission period. However, embodiments of the present application are not limited thereto, for example, the duration of the first signal can be understood as a duration of each of the plurality of first signals transmitted in one transmission period. In this case, the total duration of the first signal can be determined based on the number of the transmitted first signals and the duration of each first signal.

[0132] In some embodiments, the duration of the first signal is predefined.

[0133] Embodiments of the present application do not limit the number of the first signals transmitted in one transmission period. For example, the number of the first signals transmitted in one transmission period can be a positive integer greater than 1, such as 2, 3, 5, etc.

[0134] In some embodiments, the second parameter is predefined or preconfigured, such as predefined by a protocol.

[0135] Embodiments of the present application do not limit the configuration granularity of the second parameter. For example, the second parameter can be configured based on one or more of the following granularities: carrier, frequency band, frequency band combination, FR.

[0136] As an example, the second parameter can be configured based on FR. For example, the second parameter corresponding to FR1 is different from the second parameter corresponding to FR2.

[0137] As another example, the second parameter can be configured based on carrier. One or more carriers can correspond to a set of second parameters, that is, different carriers can correspond to different second parameters.

[0138] As yet another example, the second parameters can be configured based on frequency band or frequency band combination. One or more frequency bands (or one or more frequency band combinations) can correspond to a set of second parameters, i.e., different frequency bands or frequency band combinations can correspond to different second parameters.

[0139] As yet another example, the second parameters can be configured based on FR and frequency band. For example, different second parameters can be configured for FR1 and FR2, and within FR1, different second parameters can be configured based on frequency band granularity, and within FR2, different second parameters can be configured based on frequency band granularity, etc.

[0140] In some embodiments, in order to ensure that the terminal device can successfully detect the first signal, the terminal device detecting the first signal needs to meet certain conditions based on the manner in which the network device transmits the first signal. That is, the terminal device detecting the first signal needs to meet certain conditions, so that the first signal transmitted by the network device can be successfully detected by the terminal device in the case that there is no time synchronization between the terminal device and the network device.

[0141] In some embodiments, the detection occasion of the first signal overlaps with the duration of the first signal. In this way, the first signal transmitted by the network device can be successfully detected by the terminal device in the case that there is no time synchronization between the terminal device and the network device.

[0142] In some embodiments, the detection period of the first signal can be related to the duration of the first signal to ensure that the detection occasion of the first signal overlaps with the duration of the first signal. For example, the detection period of the first signal can be less than or equal to the duration of the first signal, so that the detection occasion of the first signal will certainly overlap with at least one duration of the first signal transmitted by the network device.

[0143] However, the embodiments of the present application are not limited thereto, for example, the detection period of the first signal can also be greater than the duration of the first signal, as long as the detection period of the first signal can overlap with the duration of the first signal. Illustratively, the detection period of the first signal can be greater than the duration of the first signal, and the first signal is periodically transmitted, so that after one or more periods of transmission, the detection occasion of the first signal can overlap with the duration of the first signal.

[0144] In some embodiments, the detection period of the first signal can be determined based on the transmission period of the first signal. For example, the detection period of the first signal can be determined based on the transmission period of the first signal and a time offset. As an example, the detection period of the first signal can be equal to the transmission period of the first signal plus or minus the time offset, i.e., the detection period of the first signal can be equal to the sum (or difference) of the transmission period of the first signal and the time offset. In this way, the relative position of the first signal transmitted by the network device in the current detection period, compared with the relative position of the first signal transmitted last time in the last detection period, will be shifted forward or backward by a certain time offset. The change of the relative position of the first signal in the detection period is beneficial to make the first signal located in the detection occasion of the terminal device for detecting the first signal, thereby being beneficial to the successful detection of the first signal by the terminal device.

[0145] In some embodiments, the time offset is determined based on the length of the duration of the first signal. For example, the time offset can be greater than or equal to the length of the duration of the first signal. Alternatively, the time offset can be less than the length of the duration of the first signal.

[0146] In some embodiments, the length of the detection occasion of the first signal can include one or more time units. For example, the length of the detection occasion of the first signal can include L time units, L being a positive integer. As an example, the length of the detection occasion of the first signal can include one time unit (such as one complete time unit).

[0147] In some embodiments, the length of the detection occasion of the first signal can include one or more time domain resources where the first signal is located. For example, the length of the detection occasion of the first signal can include one time domain resource where the first signal is located. That is, the length of the detection occasion of the first signal does not necessarily have to include one or more complete time units, but only needs to include one or more time domain resources where the signal is located, which does not necessarily have to be one or more complete time units. For example, assuming that the first signal transmitted in different time units is the same, and the number of signals included in the first signal is also the same, that is, the number of signals included in the first signal in the plurality of time units is cyclic. In this case, the length of the detection occasion of the first signal does not have to include one complete time unit, but only needs to include one time domain resource where the first signal is located. This is because the number of signals included in the first signal in the plurality of time units is cyclic, and when the length of the detection occasion of the first signal includes the time domain resource where the plurality of signals is located, the length of the detection occasion of the first signal must include one complete first signal. As shown in FIG. 7, one first signal includes 8 signals, and in the case of different timing information, as long as the length of the detection occasion of different terminal devices can always include the time domain resource where the 8 signals (i.e., signals numbered 0-7) are located.

[0148] In some embodiments, the length of the detection occasion of the first signal is related to the distribution of the first signal in the time unit. For example, in the case of equal interval distribution, the time domain resources where the plurality of signals included in the first signal are located are the same, and therefore the length of the detection occasion of the first signal can be determined according to the time domain resource where the plurality of signals included in any one first signal are located. For another example, in the case of unequal interval distribution, the time domain resources where the plurality of signals included in the first signal can be different, and in this case, the length of the detection occasion of the first signal may, for example, be determined according to the longest time domain resource among the time domain resources where the plurality of signals are located.

[0149] In some embodiments, the number of signals included in the length of the detection occasion of the first signal is greater than or equal to the number of signals included in the first signal. For example, the number of signals included in the length of the detection occasion of the first signal is equal to the number of signals included in the first signal. For another example, the number of signals included in the length of the detection occasion of the first signal is greater than the number of signals included in the first signal. Taking the first signal including 8 signals as an example, the number of signals included in the length of the detection occasion of the first signal is greater than or equal to 8.

[0150] In some embodiments, the duration of the first signal can comprise one or more time units. For example, the duration of the first signal comprises M time units, where M is a positive integer. In some embodiments, each time unit comprised by the first signal can be understood or referred to as a transmission window of the first signal.

[0151] In some embodiments, if the duration of the first signal comprises one or more time units, the first signal can be transmitted on each time unit of the one or more time units.

[0152] In some embodiments, when the first signal is transmitted on each time unit of the one or more time units, the first signal transmitted on each time unit can be the same. For example, the terminal device can repeatedly transmit the first signal on each time unit.

[0153] In some embodiments, when the first signal is transmitted on each time unit of the one or more time units, the first signal transmitted on each time unit can be different.

[0154] In some embodiments, when the first signal is transmitted on each time unit of the one or more time units, each time unit comprises one first signal. In some embodiments, the first signal transmitted on each time unit comprises a plurality of signals, and the plurality of signals are transmitted consecutively. In some embodiments, the first signal transmitted on each time unit comprises a plurality of signals, and the plurality of signals are transmitted at intervals.

[0155] In some embodiments, when the first signal is transmitted on each time unit of the one or more time units, the first signal transmitted on different time units can be the same. For example, the network device can repeatedly transmit the first signal on each time unit of the plurality of time units.

[0156] In some embodiments, when the first signal is transmitted on each time unit of the one or more time units, the first signal transmitted on different time units can be different.

[0157] In some embodiments, the length of the detection occasion of the first signal is greater than or equal to twice the length of the first signal in the time domain. For example, when the length of the first signal in the time domain is calculated in terms of time units, in some embodiments, when the first signal is transmitted on each time unit of the one or more time units, the length of the detection occasion of the first signal is greater than or equal to twice the length of each time unit of the one or more time units. In this way, when the duration of the first signal overlaps with the detection occasion of the first signal, it can be ensured that at least one complete time unit is completely contained in the detection occasion of the first signal, so that the terminal device can detect the first signal in one complete time unit.

[0158] For the convenience of understanding, the following gives an example of the network device sending the first signal and the terminal device detecting the first signal in combination with FIG. 8 to FIG. 10.

[0159] FIG. 8 and FIG. 9 are example diagrams of the first signal provided by the embodiments of the present application. As shown in FIG. 8, in one transmission period, the duration of the first signal includes 8 time units, each time unit contains one first signal, and the multiple signals included in the first signal are continuously transmitted in each time unit. As shown in FIG. 9, in one transmission period, the duration of the first signal includes 4 time units, each time unit contains one first signal, and the multiple signals included in the first signal are intermittently transmitted in each time unit.

[0160] FIG. 10 is an example diagram of the terminal device detecting the first signal. As shown in FIG. 10, the network device transmits the first signal on M=8 time units, each time unit includes one first signal. Correspondingly, the terminal device can detect the first signal according to a period P=8 time units and a length L=2 time units of the detection occasion. As can be seen from FIG. 10, when the terminal device 1, the terminal device 2 and the terminal device 3 periodically detect the first signal in a non-synchronous manner with their respective timings, at least one complete time unit can fall within the detection occasion of the terminal device, so that the terminal device can successfully detect the first signal. For the terminal device 1, the time unit falling within the detection occasion of the terminal device 1 is time unit 1. For the terminal device 2, the time unit falling within the detection occasion of the terminal device 2 is time unit 3. For the terminal device 3, the time unit falling within the detection occasion of the terminal device 3 is time unit 7.

[0161] As described above, in some embodiments, the above-mentioned first cell can be an NES cell or a cell in an NES state. In this case, after detecting the first signal, the terminal device can wake up the first cell to send a common signal such as SSB or SIB1 through the second signal. This will be introduced below in combination with FIG. 11.

[0162] FIG. 11 is a flow diagram of a method of wireless communication provided by another embodiment of the present application. The method shown in FIG. 11 includes step S1110 and step S1120.

[0163] In step S1110, the network device corresponding to the first cell sends a first signal to the terminal device.

[0164] For the related introduction of step S1110, please refer to the introduction of step S410 above, and for the sake of brevity, it will not be described here again.

[0165] In step S1120, the terminal device sends a second signal to the network device corresponding to the first cell.

[0166] In some embodiments, the second signal can be used to trigger (or wake up) the network device to transmit the common signal of the first cell, for example, to trigger the network device to transmit the synchronization signal and / or the system information of the first cell. In some embodiments, the second signal used to trigger the network device to transmit the common signal of the first cell can be understood as the second signal used to trigger the network device to transmit the on-demand common signal of the first cell, for example, to trigger the network device to transmit the on-demand synchronization signal and / or the on-demand system information of the first cell.

[0167] As an example, the second signal can be used to trigger the network device to transmit the synchronization signal of the first cell.

[0168] As another example, the second signal can be used to trigger the network device to transmit the system information of the first cell.

[0169] As yet another example, the second signal can be used to trigger the network device to transmit the synchronization signal and the system information of the first cell.

[0170] In some embodiments, the second signal can be a wake-up signal (WUS), for example, the first signal is an uplink wake-up signal.

[0171] Embodiments of the present application do not limit the resource carrying the second signal, which is exemplarily introduced as follows.

[0172] In some embodiments, the resource carrying the second signal is a predefined resource, for example, the resource carrying the second signal is a protocol predefined resource. Alternatively, the resource position of the second signal (such as time domain resource configuration, frequency domain resource position, etc.) can be predefined.

[0173] In some embodiments, the resource carrying the second signal can be determined according to a preset rule. In some embodiments, the preset rule can be related to the first signal, for example, the preset rule is that there is a certain time domain offset, frequency domain offset, etc. between the resource position of the second signal and the resource position of the first signal.

[0174] In some embodiments, the resource carrying the second signal can be determined based on the first signal. That is, the resource carrying the second signal has an association relationship with the first signal, that is, the resource carrying the second signal can have an association relationship with one or more of the plurality of first signals.

[0175] As an implementation, the resource carrying the second signal can be determined by a resource position of the first signal. For example, for each first signal, there can be associated a resource position or a set of resource positions of the second signal. Illustratively, each first signal can be associated with a resource position offset value (such as a time domain offset value, a frequency domain offset value, etc.) between a resource position of the second signal and a resource position of the first signal. In this way, after detecting the first signal, the terminal device can determine the resource position of the second signal according to the first signal (such as the resource position of the first signal).

[0176] As another implementation, the resource carrying the second signal can be indicated by the MIB in the first signal. Or, the resource carrying the second signal can be indicated by the PBCH in the first signal. For example, the MIB in the first signal can indicate relevant information of the resource of the second signal associated with the first signal, such as information of a listening time, a resource block number, a frequency domain offset, etc.

[0177] In some embodiments, the configuration information of the second signal (such as configuration information of a resource in time domain, frequency domain, code domain, etc.) can be obtained by a cell in a normal state. That is, in some embodiments, the first cell can configure the resource of the second signal of the first cell and the association between the resource of the second signal and the first signal by the cell in the normal state. In this way, after detecting the first signal, the terminal device can determine the resource of the second signal according to the association between the resource of the second signal and the first signal.

[0178] The method embodiments of the present application are described in detail above in combination with FIG. 1 to FIG. 11, and the device embodiments of the present application are described in detail below in combination with FIG. 12 to FIG. 14. It should be understood that the description of the method embodiments and the description of the device embodiments correspond to each other, and therefore, the parts not described in detail can be referred to the foregoing method embodiments.

[0179] FIG. 12 is a structural schematic diagram of a terminal device provided by an embodiment of the present application. The terminal device 1200 shown in FIG. 12 includes a detection module 1210. The detection module 1210 can be configured to detect a first signal transmitted by a network device corresponding to a first cell, the first signal being used for one or more of the following: cell identification, cell measurement, cell camping, cell access; wherein the detection of the first signal is related to a transmission mode of the first signal; or the first signal is detected based on a first parameter, the first parameter including one or more of the following: a detection period of the first signal; a length of a detection time of the first signal.

[0180] In some embodiments, the detection time of the first signal overlaps with the duration of the first signal.

[0181] In some embodiments, the detection period of the first signal is less than or equal to the duration of the first signal.

[0182] In some embodiments, the length of the detection occasion of the first signal comprises one or more time units, or the length of the detection occasion of the first signal comprises one or more time domain resources where the first signal is located.

[0183] In some embodiments, the length of the detection occasion of the first signal is greater than or equal to twice the length of the first signal in the time domain.

[0184] In some embodiments, the number of signals included in the length of the detection occasion of the first signal is greater than or equal to the number of signals included in the first signal.

[0185] In some embodiments, the duration of the first signal comprises one or more time units, and the first signal is transmitted in each of the one or more time units.

[0186] In some embodiments, the length of the detection occasion of the first signal is greater than or equal to twice the length of each of the one or more time units.

[0187] In some embodiments, the first signal transmitted in each of the one or more time units comprises a plurality of signals, and the plurality of signals are transmitted continuously, or the plurality of signals are transmitted at intervals.

[0188] In some embodiments, the detection period of the first signal is predefined, or the duration of the first signal is predefined.

[0189] In some embodiments, the detection period of the first signal is related to the RRC state of the terminal device.

[0190] In some embodiments, the detection period of the first signal corresponding to the terminal device in the RRC connected state is less than the detection period of the first signal corresponding to the terminal device in the RRC idle state or the RRC inactive state.

[0191] In some embodiments, the terminal device further comprises a sending module 1220 configured to send a second signal to the network device, wherein the second signal is used to trigger the network device to send the synchronization signal and / or the system information of the first cell; wherein the resource carrying the second signal is a predefined resource, or the resource carrying the second signal is determined based on the first signal.

[0192] In some embodiments, the resource carrying the second signal is determined by a resource position of the first signal, or the resource carrying the second signal is indicated by a master information block in the first signal.

[0193] In some embodiments, the first cell belongs to one or more of the following: a primary cell, a cell for cell selection, a cell for cell access.

[0194] In some embodiments, the first cell is a network energy saving cell, or the first cell is a cell in a network energy saving state.

[0195] In some embodiments, the detection module 1210 can be a processor 1410. The terminal device 1200 can further include a memory 1420 and a transceiver 1430, as shown in FIG. 14.

[0196] FIG. 13 is a structural schematic diagram of a network device according to an embodiment of the present application. The network device 1300 shown in FIG. 13 is a network device corresponding to the first cell. The network device 1300 includes a sending module 1310. The sending module 1310 can be configured to send a first signal to a terminal device, the first signal being used for one or more of the following: cell identification, cell measurement, cell camping, cell access; wherein the sending of the first signal is related to a detection manner of the first signal; or the first signal is sent based on a second parameter, the second parameter including one or more of the following: a sending period of the first signal; a duration of the first signal; a number of first signals sent in one sending period.

[0197] In some embodiments, the duration of the first signal overlaps with a detection occasion of the first signal.

[0198] In some embodiments, the duration of the first signal is greater than or equal to a detection period of the first signal.

[0199] In some embodiments, the length of the detection occasion of the first signal includes one or more time units, or the length of the detection occasion of the first signal includes one or more time domain resources where the first signal is located.

[0200] In some embodiments, the length of the first signal in the time domain is less than or equal to half of the length of the detection occasion of the first signal.

[0201] In some embodiments, the length of the detection occasion of the first signal includes a number of signals greater than or equal to a number of signals included in the first signal.

[0202] In some embodiments, the duration of the first signal comprises one or more time units, and the first signal is transmitted on each of the one or more time units.

[0203] In some embodiments, a length of each of the one or more time units is less than or equal to half of a length of a detection occasion of the first signal.

[0204] In some embodiments, the first signal transmitted on each of the one or more time units comprises a plurality of signals, and the plurality of signals are transmitted consecutively, or the plurality of signals are transmitted at intervals.

[0205] In some embodiments, a detection period of the first signal is predefined, or a duration of the first signal is predefined.

[0206] In some embodiments, the detection period of the first signal is related to an RRC state of the terminal device.

[0207] In some embodiments, a detection period of the first signal corresponding to the terminal device in an RRC connected state is less than a detection period of the first signal corresponding to the terminal device in an RRC idle state or an RRC inactive state.

[0208] In some embodiments, the network device further comprises a receiving module 1320 configured to receive a second signal transmitted by the terminal device, the second signal being used to trigger the network device to transmit a synchronization signal and / or system information of the first cell; wherein a resource carrying the second signal is a predefined resource, or the resource carrying the second signal is determined based on the first signal.

[0209] In some embodiments, the resource carrying the second signal is determined by a resource location of the first signal, or the resource carrying the second signal is indicated by a master information block in the first signal.

[0210] In some embodiments, the first cell belongs to one or more of the following: a primary cell, a cell for cell selection, and a cell for cell access.

[0211] In some embodiments, the first cell is a network energy saving cell, or the first cell is a cell in a network energy saving state.

[0212] In some embodiments, the transmitting module 1310 can be a transceiver 1430. The network device 1300 can further include a processor 1410 and a memory 1420, as shown in FIG. 14.

[0213] Fig. 14 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application. The dashed line in Fig. 14 indicates that the unit or module is optional. The apparatus 1400 can be used to implement the method described in the above method embodiments. The apparatus 1400 can be a chip, a terminal device or a network device.

[0214] The apparatus 1400 can include one or more processors 1410. The processor 1410 can support the apparatus 1400 to implement the method described in the above method embodiments. The processor 1410 can be a general processor or a dedicated processor. For example, the processor can be a central processing unit (CPU). Alternatively, the processor can also be other general processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The general processor can be a microprocessor or the processor can also be any conventional processor.

[0215] The apparatus 1400 can also include one or more memories 1420. The memory 1420 stores a program, which can be executed by the processor 1410, so that the processor 1410 performs the method described in the above method embodiments. The memory 1420 can be independent of the processor 1410 or integrated in the processor 1410.

[0216] The apparatus 1400 can also include a transceiver 1430. The processor 1410 can communicate with other devices or chips through the transceiver 1430. For example, the processor 1410 can perform data transceiving with other devices or chips through the transceiver 1430.

[0217] The embodiments of the present application also provide a computer readable storage medium for storing a program. The computer readable storage medium can be applied to the terminal device or the network device provided by the embodiments of the present application, and the program causes the computer to execute the method performed by the terminal device or the network device in the various embodiments of the present application.

[0218] The embodiments of the present application also provide a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal device or the network device provided by the embodiments of the present application, and the program causes the computer to execute the method performed by the terminal device or the network device in the various embodiments of the present application.

[0219] The embodiments of the present application further provide a computer program. The computer program can be applied to the terminal device or the network device provided by the embodiments of the present application, and the computer program enables a computer to execute the method performed by the terminal device or the network device in the embodiments of the present application.

[0220] It should be understood that the terms "system" and "network" can be used interchangeably in the present application. In addition, the terms used in the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The terms "first", "second", "third", and "fourth" and the like in the specification and claims of the present application and the drawings are used to distinguish different objects, and are not used to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0221] In the embodiments of the present application, the "indication" mentioned can be direct indication, or indirect indication, or can be an indication of an associated relationship. For example, A indicates B, which can mean that B can be obtained directly through A; or A indirectly indicates B, for example, A indicates C, and B can be obtained through C; or A and B have an associated relationship.

[0222] In the embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.

[0223] In the embodiments of the present application, the term "corresponding" can mean a direct or indirect corresponding relationship between the two, or can mean an associated relationship between the two, or can mean an indication and being indicated, configuration and being configured, and the like.

[0224] In the embodiments of the present application, "including" can mean direct inclusion, or indirect inclusion. Alternatively, "including" mentioned in the embodiments of the present application can be replaced by "indicating" or "used to determine". For example, A includes B can be replaced by A indicates B, or A is used to determine B.

[0225] In the embodiments of the present application, "predefined" or "preconfigured" can be implemented by pre-saving corresponding codes, tables or other means for indicating related information in devices (for example, including terminal devices and network devices), and the present application does not limit the specific implementation manner. For example, predefinition can mean definition in a protocol.

[0226] In the embodiments of the present application, the "protocol" can refer to a standard protocol in the communication field, for example, can include the LTE protocol, the NR protocol, and the related protocol applied to the future communication system, and the present application does not limit this.

[0227] The term "and / or" in the embodiments of the present application is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects.

[0228] In various embodiments of the present application, the size of the sequence number of the above processes does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0229] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0230] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiments of the present application.

[0231] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit.

[0232] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server, data center and the like integrated with one or more available media sets. The available media can be magnetic media (for example, floppy disk, hard disk, magnetic tape), optical media (for example, digital video disc (DVD)) or semiconductor media (for example, solid state disk (SSD)) and the like.

[0233] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of wireless communication, comprising: Comprising: The terminal device detects a first signal sent by a network device corresponding to a first cell, the first signal being used for one or more of the following: cell identification, cell measurement, cell camping, cell access; Wherein, the detection of the first signal is related to the sending mode of the first signal; or, the first signal is detected based on a first parameter, the first parameter including one or more of the following: The detection period of the first signal; The length of the detection occasion of the first signal.

2. The method of claim 1, wherein, The detection occasion of the first signal overlaps with the duration of the first signal.

3. The method according to claim 1 or 2, characterized in that, The detection period of the first signal is less than or equal to the duration of the first signal.

4. The method according to any one of claims 1-3, characterized in that, The length of the detection occasion of the first signal contains one or more time units, or the length of the detection occasion of the first signal contains one or more time domain resources where the first signal is located.

5. The method according to any one of claims 1-4, characterized in that, The length of the detection occasion of the first signal is greater than or equal to twice the length of the first signal in the time domain.

6. The method according to any one of claims 1-5, characterized in that, The number of signals contained in the length of the detection occasion of the first signal is greater than or equal to the number of signals contained in the first signal.

7. The method according to any one of claims 1 to 6, characterized in that, The duration of the first signal includes one or more time units, and the first signal is sent on each of the one or more time units.

8. The method of claim 7, wherein, The length of the detection occasion of the first signal is greater than or equal to twice the length of each of the one or more time units.

9. The method according to claim 7 or 8, characterized in that, The first signal sent on each of the one or more time units includes multiple signals, and the multiple signals are sent continuously or at intervals.

10. The method according to any one of claims 1-9, characterized in that, The detection period of the first signal is predefined, or the duration of the first signal is predefined.

11. The method according to any one of claims 1-10, characterized in that, The detection period of the first signal is related to the radio resource control (RRC) state of the terminal device.

12. The method of claim 11, wherein, The detection period of the first signal corresponding to the terminal device in the RRC connected state is less than the detection period of the first signal corresponding to the terminal device in the RRC idle state or the RRC inactive state.

13. The method according to any one of claims 1-12, characterized in that, The method further comprises: The terminal device sends a second signal to the network device, the second signal being used to trigger the network device to send synchronization signals and / or system information of the first cell; Wherein, the resource carrying the second signal is a predefined resource, or the resource carrying the second signal is determined based on the first signal.

14. The method of claim 13, wherein, The resource carrying the second signal is determined by the resource location of the first signal, or the resource carrying the second signal is indicated by the master information block in the first signal.

15. The method of any one of claims 1-14, wherein, The first cell belongs to one or more of the following: a primary cell, a cell used for cell selection, and a cell used for cell access.

16. The method of any one of claims 1-15, wherein, The first cell is a network energy-saving cell, or the first cell is a cell in a network energy-saving state.

17. A method of wireless communication, the method comprising: Comprising: A network device corresponding to a first cell sends a first signal to a terminal device, the first signal being used for one or more of the following: cell identification, cell measurement, cell camping, cell access; The first signal is transmitted in a manner related to a detection manner of the first signal; or the first signal is transmitted based on a second parameter, the second parameter including one or more of the following: A transmission period of the first signal; A duration of the first signal; A number of first signals transmitted in one transmission period.

18. The method of claim 17, wherein, The duration of the first signal overlaps with a detection occasion of the first signal.

19. The method of claim 17 or 18, wherein, The duration of the first signal is greater than or equal to a detection period of the first signal.

20. The method of any one of claims 17-19, wherein, A length of the detection occasion of the first signal includes one or more time units, or a length of the detection occasion of the first signal includes one or more time domain resources in which the first signal is located.

21. The method according to any one of claims 17-20, characterized by, A length of the first signal in the time domain is less than or equal to half of the length of the detection occasion of the first signal.

22. The method of any one of claims 17-21, wherein, A number of signals included in the length of the detection occasion of the first signal is greater than or equal to a number of signals included in the first signal.

23. The method of any one of claims 17-22, wherein, The duration of the first signal includes one or more time units, and the first signal is transmitted in each of the one or more time units.

24. The method of claim 23, wherein, A length of each of the one or more time units is less than or equal to half of the length of the detection occasion of the first signal.

25. The method of claim 23 or 24, wherein, The first signal transmitted in each of the one or more time units includes a plurality of signals, and the plurality of signals are transmitted continuously or at intervals.

26. The method of any one of claims 17-25, wherein, The detection period of the first signal is predefined, or the duration of the first signal is predefined.

27. The method of any one of claims 17-26, wherein, The detection period of the first signal is related to a radio resource control (RRC) state of the terminal device.

28. The method of claim 27, wherein, A detection period of the first signal corresponding to a terminal device in an RRC connected state is less than a detection period of the first signal corresponding to a terminal device in an RRC idle state or an RRC inactive state.

29. The method of any one of claims 17-28, wherein, The method further includes: The network device receives a second signal transmitted by the terminal device, the second signal being used to trigger the network device to transmit a synchronization signal and / or system information of the first cell; The resource carrying the second signal is a predefined resource, or the resource carrying the second signal is determined based on the first signal.

30. The method of claim 29, wherein, The resource carrying the second signal is determined by a resource location of the first signal, or the resource carrying the second signal is indicated by a master information block in the first signal.

31. The method of any one of claims 17-30, wherein, The first cell belongs to one or more of the following: a primary cell, a cell for cell selection, and a cell for cell access.

32. The method of any one of claims 17-31, wherein, The first cell is a network energy saving cell, or the first cell is a cell in a network energy saving state.

33. A terminal device, comprising: The method further includes: The detection module detects a first signal transmitted by a network device corresponding to a first cell, the first signal being used for one or more of the following: cell identification, cell measurement, cell camping, and cell access; The detection of the first signal is related to a transmission manner of the first signal; or the first signal is detected based on a first parameter, the first parameter including one or more of the following: A detection period of the first signal; A length of the detection occasion of the first signal.

34. The terminal device of claim 33, wherein, The detection occasion of the first signal overlaps with a duration of the first signal.

35. The terminal device of claim 33 or 34, wherein, A detection period of the first signal is less than or equal to the duration of the first signal.

36. The terminal device of any one of claims 33-35, wherein, The length of the detection occasion of the first signal includes one or more time units, or the length of the detection occasion of the first signal includes one or more time domain resources where the first signal is located.

37. The terminal device of any one of claims 33-36, wherein, The length of the detection occasion of the first signal is greater than or equal to twice a length of the first signal in the time domain.

38. The terminal device of any one of claims 33-37, wherein, The number of signals included in the length of the detection occasion of the first signal is greater than or equal to the number of signals included in the first signal.

39. The terminal device of any one of claims 33-38, wherein, The duration of the first signal includes one or more time units, and the first signal is transmitted in each of the one or more time units.

40. The terminal device of claim 39, wherein, The length of the detection occasion of the first signal is greater than or equal to twice the length of each of the one or more time units.

41. The terminal device of claim 39 or 40, wherein, The first signal transmitted in each of the one or more time units includes a plurality of signals, and the plurality of signals are transmitted continuously or at intervals.

42. The terminal device of any one of claims 33-41, wherein, The detection period of the first signal is predefined, or the duration of the first signal is predefined.

43. The terminal device of any one of claims 33-42, wherein, The detection period of the first signal is related to a radio resource control (RRC) state of the terminal device.

44. The terminal device of claim 43, wherein, The detection period of the first signal corresponding to the terminal device in an RRC connected state is less than the detection period of the first signal corresponding to the terminal device in an RRC idle state or an RRC inactive state.

45. The terminal device of any one of claims 33-44, wherein, The terminal device further includes: A sending module configured to send a second signal to the network device, the second signal being used to trigger the network device to send a synchronization signal and / or system information of the first cell. The resource carrying the second signal is a predefined resource, or the resource carrying the second signal is determined based on the first signal.

46. The terminal device of claim 45, wherein, The resource carrying the second signal is determined by a resource location of the first signal, or the resource carrying the second signal is indicated by a master information block in the first signal.

47. The terminal device of any one of claims 33-46, wherein, The first cell belongs to one or more of the following: a primary cell, a cell for cell selection, and a cell for cell access.

48. The terminal device of any one of claims 33-47, wherein, The first cell is a network energy saving cell, or the first cell is a cell in a network energy saving state.

49. A network device, comprising: The network device is a network device corresponding to the first cell, and the network device includes: A sending module configured to send a first signal to a terminal device, the first signal being used for one or more of the following: cell identification, cell measurement, cell camping, and cell access. The sending of the first signal is related to a detection mode of the first signal, or the first signal is sent based on a second parameter, the second parameter including one or more of the following: A sending period of the first signal; A duration of the first signal; A number of first signals sent in one sending period.

50. The network device of claim 49, wherein, The duration of the first signal overlaps with the detection occasion of the first signal.

51. The network device of claim 49 or 50, wherein, The duration of the first signal is greater than or equal to a detection period of the first signal.

52. The network device of any of claims 49-51, wherein, The length of the detection occasion of the first signal includes one or more time units, or the length of the detection occasion of the first signal includes one or more time domain resources where the first signal is located.

53. The network device of any of claims 49-52, wherein, The length of the first signal in the time domain is less than or equal to half of the length of the detection occasion of the first signal.

54. The network device of any of claims 49-53, wherein, The number of signals included in the length of the detection occasion of the first signal is greater than or equal to the number of signals included in the first signal.

55. The network device of any of claims 49-54, wherein, The duration of the first signal includes one or more time units, and the first signal is transmitted in each of the one or more time units.

56. The network device of claim 55, wherein, The length of each of the one or more time units is less than or equal to half of the length of the detection occasion of the first signal.

57. The network device of claim 55 or 56, wherein, The first signal transmitted in each of the one or more time units includes a plurality of signals, and the plurality of signals are transmitted continuously or at intervals.

58. The network device of any of claims 49-57, wherein, The detection period of the first signal is predefined, or the duration of the first signal is predefined.

59. The network device of any of claims 49-58, wherein, The detection period of the first signal is related to a radio resource control (RRC) state of the terminal device.

60. The network device of claim 59, wherein, The detection period of the first signal corresponding to the terminal device in an RRC connected state is less than the detection period of the first signal corresponding to the terminal device in an RRC idle state or an RRC inactive state.

61. The network device of any of claims 49-60, wherein, The network device further includes: A receiving module configured to receive a second signal transmitted by the terminal device, the second signal being used to trigger the network device to transmit a synchronization signal and / or system information of the first cell; wherein the resource carrying the second signal is a predefined resource, or the resource carrying the second signal is determined based on the first signal.

62. The network device of claim 61, wherein, The resource carrying the second signal is determined by a resource location of the first signal, or the resource carrying the second signal is indicated by a master information block in the first signal.

63. The network device of any of claims 49-62, wherein, The first cell belongs to one or more of the following: a primary cell, a cell for cell selection, and a cell for cell access.

64. The network device of any of claims 49-63, wherein, The first cell is a network energy saving cell, or the first cell is a cell in a network energy saving state.

65. A terminal device, comprising: A terminal device includes a memory and a processor, the memory is used to store a program, and the processor is used to call the program in the memory to make the terminal device execute the method in any one of claims 1-16.

66. A network device, comprising: A network device includes a transceiver, a memory and a processor, the memory is used to store a program, the processor is used to call the program in the memory and control the transceiver to receive or transmit signals, so that the network device executes the method in any one of claims 17-32.

67. An apparatus, comprising: An apparatus includes a processor configured to call a program from a memory to cause the apparatus to perform the method in any one of claims 1-16 or 17-32.

68. A chip, comprising: A chip includes a processor configured to call a program from a memory to cause a device installed with the chip to perform the method in any one of claims 1-16 or 17-32.

69. A computer-readable storage medium, characterized in that, A computer program product comprising a computer readable medium having stored thereon a computer program which causes a computer to perform the method of any one of claims 1-16 or 17-32.

70. A computer program product, characterised in that, A computer program product comprising a computer readable medium having stored thereon a computer program which causes a computer to perform the method of any one of claims 1-16 or 17-32.

71. A computer program, characterized in that, The computer program product causes a computer to perform the method of any one of claims 1-16 or 17-32.

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