Wireless communication method and communication device

Abstract

Provided are a wireless communication method and a communication device. The communication method comprises: a first terminal device receiving one or more of the following sent by a network device: a first signal, which is used for searching for or discovering a first cell; and first information, which comprises configuration information of a transmission resource of a second signal, which is used for requesting the sending of second information by the first cell.

Description

Wireless communication method and communication device TECHNICAL FIELD

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

[0002] In a cell using a network energy saving (NES) technology, a terminal device can request the cell to send system information, thereby avoiding energy consumption problems caused by periodic sending of system information.

[0003] In the case of using the NES technology, how to better support the terminal device to communicate with the cell is a problem to be solved.

[0004] SUMMARY

[0005] The present application provides a wireless communication method and a communication device. Each aspect involved in the present application is introduced below.

[0006] In a first aspect, a communication method is provided, comprising: a first terminal device receiving one or more of the following sent by a network device: a first signal for searching or discovering a first cell; and first information comprising configuration information of transmission resources of a second signal, the second signal being used to request the first cell to send second information.

[0007] In a second aspect, a communication method is provided, comprising: a network device sending one or more of the following to a first terminal device: a first signal for searching or discovering a first cell; and first information comprising configuration information of transmission resources of a second signal, the second signal being used to request the first cell to send second information.

[0008] In a third aspect, a communication device is provided, the communication device being a first terminal device, and the communication device comprising: a first communication unit configured to receive one or more of the following sent by a network device: a first signal for searching or discovering a first cell; and first information comprising configuration information of transmission resources of a second signal, the second signal being used to request the first cell to send second information.

[0009] In a fourth aspect, a communication device is provided, the communication device being a network device, and the communication device comprising: a first communication unit configured to send one or more of the following to a first terminal device: a first signal for searching or discovering a first cell; and first information comprising configuration information of transmission resources of a second signal, the second signal being used to request the first cell to send second information.

[0010] In a fifth aspect, a communication device is provided, comprising a transceiver, a memory and a processor, the memory is configured to store a program, the processor is configured to invoke the program in the memory and control the transceiver to receive or send a signal, so that the communication device performs the method in the first aspect or the second aspect.

[0011] In a sixth aspect, an apparatus is provided, comprising a processor configured to invoke a program from a memory, so that the apparatus performs the method in the first aspect or the second aspect.

[0012] In a seventh aspect, a chip is provided, comprising a processor configured to invoke a program from a memory, so that a device installed with the chip performs the method in the first aspect or the second aspect.

[0013] In an eighth aspect, a computer readable storage medium is provided, which stores a program, the program causes a computer to perform the method in the first aspect or the second aspect.

[0014] In a ninth aspect, a computer program product is provided, which comprises a program, the program causes a computer to perform the method in the first aspect or the second aspect.

[0015] In a tenth aspect, a computer program is provided, the computer program causes a computer to perform the method in the first aspect or the second aspect.

[0016] Embodiments of the present application introduce a first signal and a first information, wherein the first signal can be used for a terminal device to search or discover a cell supporting network energy saving technology, and the first information can be used for the terminal device to request information required by itself from the cell supporting network energy saving technology. As can be seen, the introduction of the first signal and the first information helps the terminal device to communicate with the cell supporting network energy saving technology. BRIEF DESCRIPTION OF DRAWINGS

[0017] FIG. 1 is an example diagram of a system architecture of a wireless communication system to which embodiments of the present application can be applied.

[0018] FIG. 2 is a schematic diagram of an operation mode of a cell provided by embodiments of the present application.

[0019] FIG. 3 is a schematic diagram of two stages of a first mode provided by embodiments of the present application.

[0020] FIG. 4 is another schematic diagram of two stages of the first mode provided by embodiments of the present application.

[0021] FIG. 5 is a flow diagram of a communication method provided by embodiments of the present application.

[0022] FIG. 6 is an example diagram of a time domain position relationship of a first signal and a second signal provided by embodiments of the present application.

[0023] FIG. 7 is an example diagram of time-frequency and frequency-domain position relationship of the first signal and the second signal according to an embodiment of the present application.

[0024] FIG. 8 is an example diagram of a process of acquiring request information by a terminal device according to an embodiment of the present application.

[0025] FIG. 9 is a flow chart of another communication method according to an embodiment of the present application.

[0026] FIG. 10 is a diagram of a determination manner of a terminal device position according to an embodiment of the present application.

[0027] FIG. 11 is an example diagram of a configuration manner of a period of the first signal according to an embodiment of the present application.

[0028] FIG. 12 is a diagram of a structure of a communication device according to an embodiment of the present application.

[0029] FIG. 13 is a diagram of a structure of a communication device according to another embodiment of the present application.

[0030] FIG. 14 is a diagram of an apparatus to which embodiments of the present application can be applied. DETAILED DESCRIPTION

[0031] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0032] 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 network coverage for a specific geographic area and can communicate with the terminal device 120 located in the coverage area. The terminal device 120 can access a network (such as a wireless network) through the network device 110. Optionally, the wireless communication system 100 can also include a network controller, a mobile management entity, and other network entities, which are not limited by embodiments of the present application.

[0033] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: 5G system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided by the present application can also be applied to future communication systems, such as the sixth generation mobile communication system, and satellite communication systems, etc.

[0034] 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 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 providing 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 function, 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 terminal device can be used to act as a base station. For example, the terminal device can act as a scheduling entity, which provides sidelink signals between terminal devices in vehicle to everything (V2X) or device to device (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.

[0035] The network device in the embodiments of the present application can be a device for communicating with a terminal device. The network device may, for example, be an access network device or a radio access network device. For example, the network device can be a base station. The base station can broadly cover various names in the following or replace the following names: Node B (Node B), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), 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.

[0036] In a conventional communication system (such as a conventional NR system), a network device periodically transmits system information (such as system information block (SIB) 1). The system information is very important for a terminal device in an idle state, because the terminal device in the idle state can access a cell based on the system information.

[0037] However, some information in the periodically transmitted system information is wasted (for example, at a certain moment, the network device transmits the system information, but at this moment, there is no terminal device that needs to acquire the system information). In addition, because the network device needs to always maintain the system information, the network device cannot enter a deep sleep mode to save power consumption. According to the statistics of operators, power consumption is one of the main sources of the operating costs of operators. Therefore, if the power consumption of the network device can be reduced, it will not only help to better operate future cellular systems, but also help the ecosystem (such as reducing carbon emissions, thereby slowing down the speed of global warming).

[0038] However, if the network device directly deletes the system information, it will cause the terminal device in the idle state to be unable to access the cell. Therefore, an ideal way is that the terminal device requests the system information of the cell on demand, and the network device only transmits the system information to the terminal device in the case of needing to transmit the system information.

[0039] Therefore, embodiments of the present application are concerned with how to effectively communicate with a cell while considering network energy saving. The scheme can be applied to a communication system provided by related technologies, such as an NR system, and can also be applied to a future communication system, such as a sixth generation (6G) communication system.

[0040] For ease of understanding, some concepts that some embodiments of the present application can involve are introduced below.

[0041] Working mode of a cell

[0042] The working mode of a cell can also be referred to as the mode of the cell or the state of the cell. In some implementations, a cell can have one or more working modes. The following takes a first cell (which can refer to any cell) as an example to illustrate in detail the working modes that a cell can have. It should be understood that a cell can have one of the working modes mentioned below, or can have multiple working modes mentioned below at the same time.

[0043] In some implementations, the working mode of the first cell can include a first mode (or referred to as a basic mode, a first state, or a basic state). In the first mode, the first cell can send one or more types of information based on a request (such as a request of a terminal device). The one or more types of information can include system information, such as SIB1.

[0044] Further, in some implementations, in the first mode, the first cell can send a first signal. The first signal mentioned here can be used for terminal devices to search for or discover the first cell. Therefore, the first signal can also be referred to as a discovery signal. The first signal can be understood as an always on signal, that is, whether there is a terminal device in the first cell or not, the first cell will always transmit the first signal in the first mode. As an example, the first cell can periodically send the first signal.

[0045] Further, in some implementations, in the first mode, the first cell can not actively transmit other signals or channels in addition to the first signal. If the first cell is desired to transmit other signals or channels in addition to the first signal, the other signals or channels can be requested based on an on-demand manner, so as to save power of the network device.

[0046] In some implementations, the working mode of the first cell can include a second mode (or off mode, second state, or off status). In the second mode, the first cell can not transmit any signals or channels. Since no signals or channels need to be transmitted, in the second mode, the cell can turn off most of the hardware, so as to greatly save power.

[0047] In some implementations, the working mode of the first cell can include a third mode (or active mode, third state, or active status). In the third mode, the first cell can periodically transmit system information. That is, in the third mode, the first cell can have normal communication function. In addition to periodically transmitting system information, the first cell can also transmit (or periodically transmit) other always on signals or channels containing system information.

[0048] In some implementations, the first cell can have two or more of the above-mentioned working modes, and can switch between the two or more working modes. For example, when the first cell does not serve terminal devices (e.g., at night time, or the first cell is in an office area, and the current time is evening), the first cell can enter the second mode (e.g., off mode). However, when the first cell serves a small number of terminal devices, the first cell can enter the first mode (e.g., basic mode). When the first cell serves a large number of terminal devices, the first cell can switch to the third mode (e.g., active mode). The conversion between the above-mentioned three working modes can refer to FIG. 2.

[0049] In some implementations, the first mode mentioned above can further include two stages. Referring to FIG. 3, in the first stage, the first cell (or network device) can only transmit the first signal mentioned above. When the first cell (or network device) receives an on-demand signal transmitted by the terminal device, the first cell (or network device) can perform unicast transmission with the terminal device, thereby entering the second stage of the first mode. In the first mode, the first cell (or network device) can not transmit various always-on signals / channels other than the first signal. That is, all other transmissions can be triggered based on the request of the terminal device, in addition to the first signal. In this way, the other transmissions performed by the first cell can be understood as transmissions that must be performed, and there is no problem of power waste.

[0050] Design of the first signal (e.g., discovery signal)

[0051] As mentioned above, in the first mode, the first cell transmits the first signal for cell search or discovery. The first signal can include a first sequence. If the first signal is referred to as a discovery signal, the first sequence can be referred to as a discovery sequence. The first sequence can be a predefined sequence and can be known by all potential terminal devices. The search or discovery of the first cell can be achieved by the terminal device detecting the first sequence. The first sequence can occupy one or more symbols in the time domain. The first sequence can or can not include the identification information (cell ID) of the first cell. If the first sequence does not include the identification information of the first cell, the terminal device can obtain the identification information of the first cell through other signals or channels.

[0052] Further, in some implementations, the first signal can further comprise first information. The first information mentioned herein can comprise one or more configurations related to the first cell. For example, the first information can comprise configuration information of a transmission resource of a second signal. The second signal can be understood as an on-demand signal for requesting the first cell to transmit second information (which can comprise system information or other types of information). Since the first information comprises the configuration information of the transmission resource of the second signal, the terminal device can determine the transmission resource of the second signal according to the configuration information, and transmit the second signal to the first cell through the transmission resource of the second signal. The first information can be carried through a first channel, which can be referred to as a minimum configuration channel. That is, through the minimum configuration channel, some basic configuration information of the first cell can be obtained. As the number of terminal devices served by the first cell increases, the first cell can enter the third mode (such as the active mode) mentioned above. In the third mode, the first cell can implement normal cell communication functions, such as transmitting normal synchronization signal blocks (SSBs) on the initial bandwidth, thereby supporting terminal devices to perform cell search. For details, refer to FIG. 4.

[0053] In some implementations, the first information can also not belong to the first signal, and the terminal device can obtain the first information based on the first signal. For example, there can be an association relationship between the transmission resource of the first signal and a second transmission resource (used to carry the first information). The association relationship can be determined based on predefined information. Accordingly, after determining the first signal, the first terminal device can determine the second transmission resource based on the transmission resource of the first signal, and obtain the first information from the second transmission resource.

[0054] The communication method provided by the embodiment of the present application will be described in detail below in combination with FIG. 5.

[0055] Referring to FIG. 5, in step S510, the first terminal device receives the first signal and / or the first information transmitted by the network device. The first signal and the first information are introduced above.

[0056] After receiving the first signal and / or the first information, the first terminal device can determine whether the first cell is in the first mode according to the first signal and / or the first information. Two possible determination methods of the first mode are given below.

[0057] Determination method 1: determining whether the first cell is in the first mode based on the first signal

[0058] As an example, the sequence in the first signal can comprise a sequence corresponding to the first mode (e.g., a sequence exclusive to the first mode). Thus, if the sequence in the first signal is the sequence corresponding to the first mode, it indicates that the first cell is in the first mode. From the perspective of the first terminal device, if the first terminal device detects the sequence corresponding to the first mode, the first terminal device knows that the first cell is in the first mode.

[0059] As another example, the first signal (or the first sequence) can be an exclusive signal (or an exclusive sequence) of the first mode. Thus, once the first terminal device detects the first signal (or the first sequence), the first terminal device knows that the first cell is in the first mode.

[0060] As another example, the transmission occasion (e.g., transmission period) of the first signal (or the first sequence) can correspond to the first mode. That is, if the transmission occasion of the first signal (or the first sequence) is the transmission occasion corresponding to the first mode, the first cell is in the first mode. During the communication process, the first terminal device can detect the first signal (or the first sequence) at a given transmission period, and if the first terminal device detects the first signal (the first sequence), the first terminal device knows that the first cell is in the first mode.

[0061] Determination method 2: determining whether the first cell is in the first mode based on the first information (e.g., a minimum configuration channel)

[0062] As an example, the first information can contain third information. The third information is used to indicate the mode in which the first cell is in. Alternatively, the third information is used to indicate whether the first cell is in the first mode. Alternatively, the third information is used to indicate that the first cell is in the first mode.

[0063] The content that the first information can contain is described in detail below.

[0064] In some implementations, the first information further includes fourth information. The fourth information can be used to indicate the radio access technology (RAT) used by the first cell. For example, the fourth information is used to indicate whether the first cell uses a 5G RAT or a 6G RAT. As a specific example, the first information can include a first message with X bits. The X bits can contain a series of indication domains. If the first cell uses a first RAT (e.g., a 5G RAT), the X bits contain a first set of indication domains; if the first cell uses a second RAT (e.g., a 6G RAT), the X bits contain a second set of indication domains. Based on the fourth information, the first terminal device can determine whether the meaning of the X bits (or the meaning of the indication domains in the X bits) in the first message should be interpreted based on the first RAT or the second RAT.

[0065] In some implementations, as mentioned above, the first information can comprise configuration information of a transmission resource (which can be referred to as on-demand resource (OD resource)) of the second signal. Based on this, the first terminal device can send the second signal on the transmission resource to request the first cell to send information (e.g., system information) that the first terminal device needs. The time domain resource of the first signal and the time domain resource of the second signal can be located in the same time slot (as shown in FIG. 6), or can be located in different time slots. In some implementations, the transmission resource (including time domain resource and / or frequency domain resource) of the first signal and the transmission resource (including time domain resource and / or frequency domain resource) of the second signal can have an association relationship. That is, the transmission resource of the second signal can be determined based on the transmission resource of the first signal. As shown in FIG. 7, based on the transmission resource of the first signal and offset value 1, the time domain location of the transmission resource of the second signal can be determined; similarly, based on the transmission resource of the first signal and offset value 2, the frequency domain location of the transmission resource of the second signal can be determined.

[0066] In some implementations, the first information can comprise fifth information. The fifth information can be used to configure the first search space, and thus the fifth information can also be referred to as configuration information of the first search space. The first search space is used to detect the first PDCCH sent by the network device after the first terminal device sends the second signal. In addition to the configuration information of the first search space, in some implementations, the first information can also comprise time domain resource assignment (TDRA) related configuration information.

[0067] The behavior of the first terminal device after sending the second signal (on-demand signal) is described in detail below.

[0068] In some implementations, after the first terminal device sends the second signal, the first terminal device can detect the first PDCCH in the first search space (which can be configured by the fifth information mentioned above). The first PDCCH (or the DCI in the first PDCCH) can be scrambled based on a first radio network temporary identity (RNTI). The first RNTI can be determined based on the transmission resource of the second signal mentioned above. Alternatively, the first RNTI can also be determined by other predefined rules. As an example, the first RNTI is random access radio network temporary identity (RA-RATI).

[0069] In some implementations, after the first terminal device transmits the second signal, the first terminal device can start a first timer. If the first timer expires, the first terminal device transmits the second signal again. Or, if the first timer expires and the first terminal device does not detect the first PDCCH (or does not receive the second information (i.e., the information requested by the first terminal device through the second signal, such as system information)), the first terminal device transmits the second signal again. Or, if the first timer expires and the number of times of transmission of the second signal does not reach a first number, the first terminal device transmits the second signal again. In some implementations, if the first terminal device receives the aforementioned second information, the first terminal device stops the first timer.

[0070] In some implementations, the aforementioned first PDCCH can be used to schedule a first PDSCH. The first PDSCH can contain the aforementioned second information. Or, the aforementioned second information can be contained in the first PDCCH. Or, the first PDCCH and the first PDSCH collectively include the aforementioned second information.

[0071] In some implementations, the first terminal device transmits sixth information to the network device. The sixth information is used to indicate whether the first terminal device correctly receives the first PDSCH. The sixth information can be referred to as acknowledgment information, such as acknowledgment (ACK) or negative acknowledgment (NACK). For example, if the first terminal device correctly receives the first PDSCH, the first terminal device transmits ACK to the network device; if the first terminal device does not correctly receive the first PDSCH, the first terminal device transmits NACK to the network device. From the perspective of the network device, if the network device receives ACK, the network device stops transmitting the second information to the first terminal device. Otherwise, the network device retransmits the first PDSCH to resend the second information to the first terminal device.

[0072] Before transmitting the sixth information, the first terminal device needs to determine a transmission resource (hereinafter referred to as a first transmission resource) of the sixth information. The embodiments of the present application do not make specific limitations on the determination method of the first transmission resource. For example, the first information mentioned above can contain configuration information of the first transmission resource. For another example, the DCI in the first PDCCH can indicate the first transmission resource. For another example, the first information contains configuration information of the first transmission resource, and the configuration information of the first transmission resource is used to configure multiple first transmission resources, and further, the DCI in the first PDCCH indicates the first transmission resource currently used by the first terminal device from the multiple first transmission resources. For another example, the first transmission resource can be determined based on the second information, for example, the second information can indicate the first transmission resource.

[0073] In some implementations, the first PDSCH can further include timing advance information of the first terminal device. For example, the first PDSCH carries a medium access control control element (MAC CE), and the MAC CE contains a timing advance command (TAC) used to carry the timing advance information of the first terminal device. After receiving the timing advance information, the terminal device can adjust its timing advance amount, and communicate with the network device based on the adjusted timing advance amount. For example, the terminal device can transmit the sixth information mentioned above based on the adjusted timing advance amount, thereby improving the transmission success rate of the sixth information.

[0074] In the above-mentioned implementations, the first PDSCH contains the second information requested by the first terminal device. In other implementations, the first PDSCH can also schedule the first terminal device to perform uplink transmission (similar to message 2 (MSG2) in the random access process) first, so that the first terminal device can send the request information to the network device through the uplink transmission process; then, the network device can transmit the corresponding information to the first terminal device through the subsequent downlink transmission process. The following will be illustrated in more detail by combining FIG. 8.

[0075] Referring to FIG. 8, after the first terminal device transmits the second signal, a first PDCCH can be received. The first PDCCH can be used to schedule a first PDSCH, and the first PDSCH includes one or more of the following information: a first uplink grant (UL grant), timing advance information (e.g., TAC), a second RNTI (e.g., a system information radio network temporary identity (SI-RNTI) or a temporary cell radio network temporary identity (TC-RNTI)).

[0076] The first uplink grant is used to schedule a first PUSCH transmitted by the first terminal device. The first PUSCH can be used to request system information from the network device. The system information can be, for example, SIB1 information.

[0077] Alternatively, the first PUSCH can be used to request the network device to establish an RRC connection.

[0078] Alternatively, the first PUSCH can be used to request the network device to request neighboring cell information of the first cell. The neighboring cell information of the first cell can include, for example, reselection information of a neighboring cell.

[0079] Alternatively, the first PUSCH can be used to request the network device to request information related to a paging signal. The information related to the paging signal can include, for example, resource configuration information of the paging signal.

[0080] Alternatively, the first PUSCH can be used to request the network device to access the first cell (i.e., includes information requesting to access the first cell).

[0081] Alternatively, the first PUSCH can be used to request the network device to request time information of the first cell. The time information can include, for example, global positioning system (GPS) time and / or universal time coordinated (UTC) time.

[0082] Alternatively, the first PUSCH can be used to request the network device to request synchronization information. The synchronization information can include, for example, one or more of the following of the first cell: a slot index, a frame index, a cell index (or identification information of the cell).

[0083] Alternatively, the first PUSCH can be used to request information related to synchronization signals from the network device. The synchronization signals mentioned herein can include SSB and / or tracking reference signal (TRS), for example. The information related to the synchronization signals can include configuration information of the synchronization signals, for example.

[0084] After receiving the first PDSCH and transmitting the first PUSCH, the first terminal device continues to detect a second PDCCH transmitted by the network device. The second PDCCH can be used to schedule a second PDSCH, and the second PDSCH can include the information requested by the first terminal device. For example, the second PDSCH can include one or more of the following information: system information, information of a neighboring cell of the first cell, information related to a paging signal, confirmation information (similar to message 4 in a random access process) for accessing the first cell, time information of the first cell, synchronization information, information related to synchronization signals.

[0085] In some implementations, the second PDCCH (or the DCI in the second PDCCH) described above can be scrambled based on the second RNTI mentioned above. The description of the second RNTI can be found above.

[0086] In some implementations, the first terminal device can detect the second PDCCH described above in a first search space. The first search space can be configured by the first information mentioned above.

[0087] In some implementations, after receiving the second PDSCH, the first terminal device can transmit confirmation information (such as ACK / NACK) corresponding to the second PDSCH to the network device.

[0088] As mentioned above, in some implementations, a cell can switch between multiple operation modes. Assuming that the first cell is in the first mode (basic mode) or the third mode (active mode), and the second cell (which can be a neighboring cell of the first cell) is in the second mode (off mode), in this case, if the first terminal device is located within the coverage of the second cell, the mode of the second cell can be switched from the second mode to the first mode or the third mode, so that the first terminal device can select or reselect to the second cell. To achieve the above function, the network device needs to determine the location of the first terminal device, and a possible implementation is provided as follows.

[0089] For example, referring to step S910 in FIG. 9, a first set of random access resources and a second set of random access resources can be configured for the first cell. The set of random access resources mentioned here can be divided based on the time domain, frequency domain and / or code domain resources of a physical random access channel (PRACH). For example, different sets of random access resources can contain different random access preambles. For another example, different sets of random access resources can correspond to different PRACH occasions. The first set of random access resources can correspond to a first threshold, and the second set of random access resources can correspond to a second threshold. The first threshold and the second threshold are thresholds of signal quality of a synchronization signal (such as an SSB) transmitted by the first signal or the first cell, and the first threshold is greater than the second threshold. That is, the first threshold and the second threshold can correspond to different coverage ranges, as shown in FIG. 10.

[0090] On the basis of configuring the above two sets of random access resources, the terminal device can send a message 1 to the network device on the selected random access resource (see step S920 in FIG. 9). The network device can determine the location of the first terminal device according to the set of random access resources selected by the first terminal device. For example, when the first terminal device selects a random access resource in the second set of random access resources, the first terminal device can be located in the coverage range of the second cell (in the off mode). In this case, the network device can infer that the first terminal device can enter the coverage range of the second cell, and therefore, referring to step S930 in FIG. 9, the network device can open the second cell, i.e., switch the operating mode of the second cell from the second mode to the first mode (basic mode) or the third mode (active mode).

[0091] Further, in some implementations, if the first terminal device accesses the first cell based on a random access resource in the second set of random access resources, the network device can send sixth information to the first terminal device (see step S940 in FIG. 9). The sixth information can be used to configure or reconfigure the neighbor cell information of the first cell and / or trigger the first terminal device to perform cell reselection. For example, after the network device opens the second cell from the off mode, the neighbor cell information of the first cell can be reconfigured, so that the second cell is added to the neighbor cell information of the first cell. On this basis, the network device can trigger the first terminal device to perform cell reselection, so that the first terminal device accesses the second cell with better signal quality.

[0092] In some embodiments, after the first terminal device sends the first random access message (PRACH) or message 1 to the network device, the first terminal device receives the eighth information sent by the network device. The eighth information is used to instruct the first terminal device to re-perform cell selection. For example, after receiving the message 1, the network device can determine that the second cell in the second mode (off mode) is more suitable for serving the first terminal device according to the message 1 (such as according to the signal quality of the message 1). Therefore, the network device can turn on the second cell (i.e., enter the first mode or the third mode mentioned above). On this basis, the network device can require the first terminal device to re-perform cell selection, so that the first terminal device can discover and directly select the second cell, so that the first terminal device can access the second cell as soon as possible.

[0093] It is mentioned above that the first signal can be a periodically transmitted signal. There can be various ways for the network device to periodically transmit the first signal. For example, the network device can always transmit the first signal according to a fixed period. Alternatively, the network device can also transmit a group of first signals (which can include one or more first signals) according to a first period. The group of first signals can be understood as a burst of first signals (for example, the group of first signals can be referred to as a discovery burst when the first signal is a discovery signal). Correspondingly, the first period can also be understood as a burst period of the first signal. Further, in some embodiments, in a group of first signals, two adjacent first signals can be transmitted at equal intervals according to a second period (which is less than the first period). As an example, as shown in FIG. 11, the time interval between two adjacent groups of first signals (i.e., the burst period of the first signal) can be 100 milliseconds (ms), and the time interval between two adjacent first signals in the same group can be 5 ms. After introducing the first period (burst period), if the second signal mentioned above is not received during two burst periods, the network device can enter the sleep mode. In addition, since the time interval between adjacent first signals in a group of first signals is short, the first terminal device can quickly search for the first signal by merging the signals. As can be seen, based on the above design of the first signal, on the one hand, the difficulty of the first terminal device searching for the first signal can be reduced, and on the other hand, the power consumption of the network device can be further saved.

[0094] The method embodiments of the present application are described in detail above in combination with FIGS. 1 to 11, and the device embodiments of the present application are described in detail below in combination with FIGS. 12 to 14. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, and therefore, the parts not described in detail can be referred to the foregoing method embodiments.

[0095] FIG. 12 is a structural diagram of a communication device according to an embodiment of the present application. The communication device 1200 shown in FIG. 12 can be the first terminal device mentioned above. The communication device 1200 can include a first communication unit 1210. The first communication unit 1210 can be configured to receive one or more of the following from a network device: a first signal for searching for or discovering a first cell; and first information including configuration information of a transmission resource of a second signal for requesting the first cell to transmit second information.

[0096] In some embodiments, the operation mode of the first cell includes one or more of the following: a first mode in which the first cell transmits system information of the first cell based on the request; a second mode in which the first cell does not transmit any signal or channel; and a third mode in which the first cell periodically transmits system information of the first cell.

[0097] In some embodiments, whether the first cell is in the first mode is determined based on the first signal or the first information.

[0098] In some embodiments, whether the first cell is in the first mode is determined based on the first signal, including: if a sequence in the first signal is a sequence corresponding to the first mode, the first cell is in the first mode; or if a transmission occasion of the first signal is a transmission occasion corresponding to the first mode, the first cell is in the first mode.

[0099] In some embodiments, whether the first cell is in the first mode is determined based on the first information, including: whether the first cell is in the first mode is determined based on third information included in the first information, and the third information is used to indicate the mode in which the first cell is in.

[0100] In some embodiments, the first information further includes fourth information used to indicate a radio access technology used by the first cell.

[0101] In some embodiments, the communication device further includes a detection unit configured to detect a first PDCCH in a first search space after the first terminal device transmits the second signal.

[0102] In some embodiments, the first information further includes fifth information used to configure the first search space.

[0103] In some embodiments, the first PDCCH is scrambled based on a first RNTI, and the first RNTI is determined based on the transmission resource of the second signal.

[0104] In some embodiments, the communication device 1200 further includes: a starting unit, configured to start a first timer after the first terminal device transmits the second signal; and a second communication unit, configured to retransmit the second signal if the first timer expires.

[0105] In some embodiments, the second communication unit is configured to retransmit the second signal if the first timer expires and a number of times of transmission of the second signal does not reach a first number.

[0106] In some embodiments, the communication device 1200 further includes: a stopping unit, configured to stop the first timer if the first terminal device receives the second information.

[0107] In some embodiments, the first PDCCH is used to schedule a first PDSCH, and the first PDSCH or the first PDCCH includes the second information.

[0108] In some embodiments, the first PDSCH further includes timing advance information of the first terminal device.

[0109] In some embodiments, the communication device 1200 further includes: a third communication unit, configured to transmit sixth information to the network device, the sixth information being used to indicate whether the first terminal device correctly receives the first PDSCH.

[0110] In some embodiments, the sixth information is carried in a first transmission resource, and the first information includes configuration information of the first transmission resource.

[0111] In some embodiments, the sixth information is carried in a first transmission resource, and the first transmission resource is indicated based on a first DCI, and the first DCI is carried in the first PDCCH.

[0112] In some embodiments, a transmission resource of the sixth information is determined based on the second information.

[0113] In some embodiments, the first PDCCH is used to schedule a first PDSCH, and the first PDSCH includes one or more of the following information: a first uplink grant; timing advance information; and a second RNTI.

[0114] In some embodiments, the first uplink grant is used for scheduling a first physical uplink shared channel (PUSCH), and the first PUSCH is used for requesting one or more of the following: system information of the first cell; establishing an RRC connection; neighboring cell information of the first cell; related information of a paging signal; accessing the first cell; time information of the first cell; synchronization information; and related information of a synchronization signal.

[0115] In some embodiments, the communication device 1200 further includes a fourth communication unit configured to receive a second PDCCH transmitted by the network device, the second PDCCH being used for scheduling a second PDSCH, and the second PDSCH containing one or more of the following: system information of the first cell; neighboring cell information of the first cell; related information of a paging signal; confirmation information of accessing the first cell; time information of the first cell; synchronization information; and related information of a synchronization signal.

[0116] In some embodiments, the second PDCCH is scrambled based on the second RNTI.

[0117] In some embodiments, the first cell is configured with a first set of random access resources and a second set of random access resources, the first set of random access resources corresponding to a first threshold, the second set of random access resources corresponding to a second threshold, the first threshold and the second threshold being thresholds of signal quality of the first signal or a synchronization signal transmitted by the first cell, and the first threshold being greater than the second threshold.

[0118] In some embodiments, the communication device 1200 further includes a fifth communication unit configured to, if the first terminal device accesses the first cell based on a random access resource in the second set of random access resources, receive seventh information transmitted by the network device, the seventh information being used for configuring neighboring cell information of the first cell and / or triggering the first terminal device to perform cell reselection.

[0119] In some embodiments, the communication device 1200 further includes a sixth communication unit configured to, after the first terminal device transmits a first random access message or message 1 to the network device, receive eighth information transmitted by the network device, the eighth information being used for instructing the first terminal device to re-perform cell selection.

[0120] In some embodiments, the first signal is associated with a first period and a second period, the first period being used for indicating a time interval between a group of the first signals, the second period being a time interval between two adjacent first signals in the group of the first signals, and the first period being less than the second period.

[0121] In some embodiments, the first signal comprises the first information; or a second transmission resource is determined based on a transmission resource of the first signal, and the second transmission resource is used to carry the first information.

[0122] In some embodiments, a time domain resource of the first signal is associated with a time domain resource of the second signal.

[0123] In some embodiments, the time domain resource of the first signal is in a same time slot as the time domain resource of the second signal.

[0124] In some embodiments, the first signal is a discovery signal.

[0125] In some embodiments, the first signal comprises a first sequence, and the first sequence comprises identification information of the first cell.

[0126] In some embodiments, the second information comprises system information of the first cell.

[0127] FIG. 13 is a structural schematic diagram of a communication device according to another embodiment of the present application. The communication device 1300 described in FIG. 13 can be the network device mentioned above. The communication device 1300 can comprise a first communication unit 1310. The first communication unit 1310 is configured to send one or more of the following to a first terminal device: a first signal used for searching or discovering a first cell; and first information comprising configuration information of a transmission resource of a second signal used for requesting the first cell to send second information.

[0128] In some embodiments, the operation mode of the first cell comprises one or more of the following modes: a first mode in which the first cell sends system information of the first cell based on a request; a second mode in which the first cell does not transmit signals or channels; and a third mode in which the first cell periodically sends the system information of the first cell.

[0129] In some embodiments, whether the first cell is in the first mode is determined based on the first signal or the first information.

[0130] In some embodiments, whether the first cell is in the first mode is determined based on the first signal, comprising: if a sequence in the first signal is a sequence corresponding to the first mode, the first cell is in the first mode; or if a transmission occasion of the first signal is a transmission occasion corresponding to the first mode, the first cell is in the first mode.

[0131] In some embodiments, whether the first cell is in the first mode is determined based on the first information, including: whether the first cell is in the first mode is determined based on third information, the third information is contained in the first information, and the third information is used to indicate the mode in which the first cell is located.

[0132] In some embodiments, the first information further includes fourth information, the fourth information is used to indicate the radio access technology used by the first cell.

[0133] In some embodiments, the communication device 1300 further includes: a second communication unit, configured to send a first PDCCH in a first search space after receiving the second signal sent by the first terminal device.

[0134] In some embodiments, the first information further includes fifth information, the fifth information is used to configure the first search space.

[0135] In some embodiments, the first PDCCH is scrambled based on a first RNTI, the first RNTI is determined based on the transmission resource of the second signal.

[0136] In some embodiments, the first PDCCH is used to schedule a first PDSCH, and the first PDSCH or the first PDCCH includes the second information.

[0137] In some embodiments, the first PDSCH further includes timing advance information of the first terminal device.

[0138] In some embodiments, the communication device 1300 further includes: a third communication unit, configured to receive sixth information sent by the first terminal device, the sixth information is used to indicate whether the first terminal device correctly receives the first PDSCH.

[0139] In some embodiments, the sixth information is carried in a first transmission resource, and the first information includes configuration information of the first transmission resource.

[0140] In some embodiments, the sixth information is carried in a first transmission resource, and the first transmission resource is determined based on a first DCI indication, and the first DCI is carried in the first PDCCH.

[0141] In some embodiments, the transmission resource of the sixth information is determined based on the second information.

[0142] In some embodiments, the first PDCCH is used to schedule a first PDSCH, and the first PDSCH includes one or more of the following information: a first uplink grant; timing advance information; a second RNTI.

[0143] In some embodiments, the first uplink grant is used for scheduling a first PUSCH, and the first PUSCH is used for requesting one or more of the following: system information of the first cell; establishing an RRC connection; neighbor cell information of the first cell; related information of a paging signal; accessing the first cell; time information of the first cell; synchronization information; related information of a synchronization signal.

[0144] In some embodiments, the communication device 1300 further comprises a fourth communication unit configured to send a second PDCCH to the first terminal device, the second PDCCH is used for scheduling a second PDSCH, and the second PDSCH contains one or more of the following: system information of the first cell; neighbor cell information of the first cell; related information of a paging signal; confirmation information of accessing the first cell; time information of the first cell; synchronization information; related information of a synchronization signal.

[0145] In some embodiments, the second PDCCH is scrambled based on the second RNTI.

[0146] In some embodiments, the first cell is configured with a first set of random access resources and a second set of random access resources, the first set of random access resources corresponds to a first threshold, the second set of random access resources corresponds to a second threshold, the first threshold and the second threshold are thresholds of signal quality of the first signal or a synchronization signal sent by the first cell, and the first threshold is greater than the second threshold.

[0147] In some embodiments, the communication device 1300 further comprises a switching unit configured to switch an operation mode of a second cell from a second mode to a first mode or a third mode if the first terminal device accesses the first cell based on a random access resource in the second set of random access resources, wherein: in the first mode, the first cell sends system information of the first cell based on a request; in the second mode, the first cell does not transmit signals or channels; in the third mode, the first cell periodically sends system information of the first cell.

[0148] In some embodiments, the communication device 1300 further comprises a fifth communication unit configured to send seventh information to the first terminal device if the first terminal device accesses the first cell based on a random access resource in the second set of random access resources, the seventh information is used for configuring neighbor cell information of the first cell and / or triggering the first terminal device to perform cell reselection.

[0149] In some embodiments, the communication device 1300 further includes a sixth communication unit, configured to send eighth information to the first terminal device after the first terminal device sends a first random access message or message 1 to the network device, the eighth information being used to instruct the first terminal device to reselect a cell.

[0150] In some embodiments, the first signal is associated with a first period and a second period, the first period being used to indicate a time interval between a group of the first signals, and the second period being a time interval between two adjacent first signals in the group of the first signals, the first period being smaller than the second period.

[0151] In some embodiments, the first signal contains the first information, or a second transmission resource is determined based on a transmission resource of the first signal, the second transmission resource being used to carry the first information.

[0152] In some embodiments, a time domain resource of the first signal and a time domain resource of the second signal are associated.

[0153] In some embodiments, the time domain resource of the first signal and the time domain resource of the second signal are located in a same time slot.

[0154] In some embodiments, the first signal is a discovery signal.

[0155] In some embodiments, the first signal includes a first sequence, and the first sequence contains identification information of the first cell.

[0156] In some embodiments, the second information includes system information of the first cell.

[0157] FIG. 14 is a schematic structural diagram of a communication device to which embodiments of the present application can be applied. The dashed line in FIG. 14 indicates that the unit or module is optional. The device 1400 can be used to implement the methods described in the above method embodiments. The device 1400 can be a chip, a terminal device, or a network device.

[0158] The apparatus 1400 can include one or more processors 1410. The processor 1410 can support the apparatus 1400 to implement the methods described in the foregoing method embodiments. The processor 1410 can be a general processor or a special-purpose processor. For example, the processor can be a central processing unit (CPU). Alternatively, the processor can also be other general processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) 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.

[0159] The apparatus 1400 can further 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 methods described in the foregoing method embodiments. The memory 1420 can be independent of the processor 1410 or integrated in the processor 1410.

[0160] The apparatus 1400 can further 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.

[0161] The embodiments of the present application further provide a computer readable storage medium for storing a program. The computer readable storage medium can be applied in 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 communication device in the embodiments of the present application.

[0162] The embodiments of the present application further provide a computer program product. The computer program product includes a program. The computer program product can be applied in 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 communication device in the embodiments of the present application.

[0163] The embodiments of the present application further provide a computer program. The computer program can be applied in the terminal device or the network device provided by the embodiments of the present application, and the computer program causes the computer to execute the method performed by the communication device in the embodiments of the present application.

[0164] It should be understood that the terms "system" and "network" can be used interchangeably in this application. In addition, the terms used in this application are only used to explain the specific embodiments of the application, and are not intended to limit the application. The terms "first", "second", "third", and "fourth" and the like in the specification and claims of the 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.

[0165] In embodiments of the present application, the term "indicate" can be direct indication or indirect indication, or can represent 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.

[0166] In 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.

[0167] In embodiments of the present application, the term "corresponding" can represent a direct or indirect corresponding relationship between the two, or can represent an associated relationship between the two, or can represent an indication and being indicated, configuration and being configured, and the like.

[0168] In embodiments of the present application, "predefined" or "preconfigured" can be achieved by pre-saving corresponding codes, tables or other information that can be used to indicate related information in devices (such as terminal devices and network devices), and the specific implementation of the present application is not limited. For example, predefinition can refer to definition in a protocol.

[0169] In embodiments of the present application, the "protocol" can refer to a standard protocol in the communication field, which can include LTE protocol, NR protocol and related protocols applied to future communication systems, and the present application is not limited thereto.

[0170] In embodiments of the present application, the term "and / or" is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper generally represents an "or" relationship between the front and rear associated objects.

[0171] In various embodiments of the present application, the size of the serial number of the above processes does not mean the order of execution, and the execution order of the processes should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0172] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the division of the above-described device embodiments is only a logical function division, and there can be another division manner for actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different units, or between the different components, can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0173] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0174] In addition, each functional unit in the various embodiments of the present application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit.

[0175] 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.

[0176] 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 communication method characterized by comprising: Comprising: The first terminal device receives one or more of the following sent by the network device: A first signal used for searching or discovering the first cell; First information including configuration information of a transmission resource of a second signal used for requesting the first cell to send second information.

2. The method of claim 1, wherein, The operation mode of the first cell includes one or more of the following modes: A first mode in which the first cell sends system information of the first cell based on a request; A second mode in which the first cell does not transmit signals or channels; A third mode in which the first cell periodically sends system information of the first cell.

3. The method of claim 2, wherein, Whether the first cell is in the first mode is determined based on the first signal or the first information.

4. The method of claim 3, wherein, Whether the first cell is in the first mode is determined based on the first signal, including: If a sequence in the first signal is a sequence corresponding to the first mode, the first cell is in the first mode; or If a transmission occasion of the first signal is a transmission occasion corresponding to the first mode, the first cell is in the first mode.

5. The method of claim 3, wherein, Whether the first cell is in the first mode is determined based on the first information, including: Whether the first cell is in the first mode is determined based on third information, the third information being contained in the first information, and the third information being used to indicate a mode in which the first cell is located.

6. The method according to any one of claims 1 to 5, characterized in that, The first information further includes fourth information used to indicate a radio access technology used by the first cell.

7. The method according to any one of claims 1 to 6, characterized in that, The method further includes: After the first terminal device sends the second signal, the first terminal device detects a first physical downlink control channel (PDCCH) in a first search space.

8. The method of claim 7, wherein, The first information further includes fifth information used to configure the first search space.

9. The method according to claim 7 or 8, characterized in that, The first PDCCH is scrambled based on a first radio network temporary identifier (RNTI), and the first RNTI is determined based on a transmission resource of the second signal.

10. The method according to any one of claims 7 to 9, characterized in that, The method further includes: After the first terminal device sends the second signal, the first terminal device starts a first timer; If the first timer expires, the first terminal device sends the second signal again.

11. The method of claim 10, wherein, The if the first timer expires, the first terminal device sends the second signal again, includes: If the first timer expires and a number of times of transmission of the second signal does not reach a first number, the first terminal device sends the second signal again.

12. The method according to claim 10 or 11, characterized in that, The method further includes: If the first terminal device receives the second information, the first terminal device stops the first timer.

13. The method according to any one of claims 7 to 12, characterized in that, The first PDCCH is used to schedule a first physical downlink shared channel (PDSCH), and the first PDSCH or the first PDCCH includes the second information.

14. The method of claim 13, wherein, The first PDSCH further includes timing advance information of the first terminal device.

15. The method according to claim 13 or 14, characterized in that, The method further includes: The first terminal device sends sixth information to the network device, where the sixth information is used to indicate whether the first terminal device correctly receives the first PDSCH.

16. The method of claim 15, wherein, The sixth information is carried in a first transmission resource, and the first information includes configuration information of the first transmission resource.

17. The method according to claim 15 or 16, characterized in that, The sixth information is carried in a first transmission resource, and the first transmission resource is indicated based on a first downlink control information (DCI), and the first DCI is carried in the first PDCCH.

18. The method of claim 15, wherein, A transmission resource of the sixth information is determined based on the second information.

19. The method according to any one of claims 7 to 18, characterized in that, The first PDCCH is used to schedule a first PDSCH, and the first PDSCH includes one or more of the following information: a first uplink grant; timing advance information; a second RNTI.

20. The method of claim 19, wherein, The first uplink grant is used to schedule a first physical uplink shared channel (PUSCH), and the first PUSCH is used to request one or more of the following: system information of the first cell; establishment of a radio resource control (RRC) connection; neighbor cell information of the first cell; related information of a paging signal; access to the first cell; time information of the first cell; synchronization information; related information of a synchronization signal.

21. The method according to claim 19 or 20, characterized in that, The method further includes: The first terminal device receives a second PDCCH sent by the network device, where the second PDCCH is used to schedule a second PDSCH, and the second PDSCH includes one or more of the following information: system information of the first cell; neighbor cell information of the first cell; related information of a paging signal; confirmation information of access to the first cell; time information of the first cell; synchronization information; related information of a synchronization signal.

22. The method of claim 21, wherein, The second PDCCH is scrambled based on the second RNTI.

23. The method of any one of claims 1 to 22, wherein, The first cell is configured with a first random access resource set and a second random access resource set, the first random access resource set corresponds to a first threshold, the second random access resource set corresponds to a second threshold, the first threshold and the second threshold are thresholds of signal quality of the first signal or a synchronization signal sent by the first cell, and the first threshold is greater than the second threshold.

24. The method of claim 23, wherein, The method further includes: If the first terminal device accesses the first cell based on a random access resource in the second random access resource set, the first terminal device receives seventh information sent by the network device, where the seventh information is used to configure neighbor cell information of the first cell and / or trigger the first terminal device to perform cell reselection.

25. The method of any one of claims 1 to 24, wherein, The method further includes: After the first terminal device sends a first random access message or message 1 to the network device, the first terminal device receives eighth information sent by the network device, where the eighth information is used to indicate that the first terminal device reselects a cell.

26. The method of any one of claims 1 to 25, wherein, The first signal is associated with a first period and a second period, the first period is used to indicate a time interval between a group of the first signals, the second period is a time interval between adjacent two first signals in the group of the first signals, and the first period is less than the second period.

27. The method of any of claims 1-26, wherein: the first signal comprises the first information; or, a second transmission resource is determined based on a transmission resource of the first signal, the second transmission resource being used to carry the first information. a time domain resource of the first signal is associated with a time domain resource of the second signal.

28. The method of any one of claims 1 to 27, wherein, the time domain resource of the first signal is in a same time slot as the time domain resource of the second signal.

29. The method of claim 28, wherein, the first signal is a discovery signal.

30. The method of any one of claims 1 to 29, wherein, the first signal comprises a first sequence, the first sequence comprising identification information of the first cell.

31. The method of any one of claims 1 to 30, wherein, the second information comprises system information of the first cell.

32. The method of any one of claims 1 to 31, wherein, comprising:

33. A method of communication, comprising: the network device sends, to the first terminal device, one or more of: a first signal used for searching or discovering the first cell; first information comprising configuration information of a transmission resource of a second signal, the second signal being used to request the first cell to send second information. a mode of operation of the first cell comprises one or more of:

34. The method of claim 33, wherein, a first mode in which the first cell sends system information of the first cell based on a request; a second mode in which the first cell does not transmit signals or channels; a third mode in which the first cell periodically sends system information of the first cell. whether the first cell is in the first mode is determined based on the first signal or the first information.

35. The method of claim 34, wherein, whether the first cell is in the first mode is determined based on the first signal, comprising:

36. The method of claim 35, wherein, if a sequence in the first signal is a sequence corresponding to the first mode, the first cell is in the first mode; or, if a transmission occasion of the first signal is a transmission occasion corresponding to the first mode, the first cell is in the first mode. whether the first cell is in the first mode is determined based on the first information, comprising:

37. The method of claim 35, wherein, whether the first cell is in the first mode is determined based on third information, the third information being comprised in the first information and being used to indicate a mode in which the first cell is. the first information further comprises fourth information used to indicate a radio access technology used by the first cell.

38. The method of any one of claims 33-37, wherein, the method further comprises:

39. The method of any one of claims 33-38, wherein, after receiving the second signal sent by the first terminal device, the network device sends a first physical downlink control channel (PDCCH) in a first search space. the first information further comprises fifth information used to configure the first search space.

40. The method of claim 39, wherein, the first PDCCH is scrambled based on a first radio network temporary identifier (RNTI), the first RNTI being determined based on the transmission resource of the second signal.

41. The method of claim 39 or 40, wherein, the first PDCCH is used to schedule a first physical downlink shared channel (PDSCH), the first PDSCH or the first PDCCH comprising the second information.

42. The method of any one of claims 39-41, wherein, the first PDSCH further comprises timing advance information of the first terminal device.

43. The method of claim 42, wherein, the method further comprises:

44. The method of claim 42 or 43, wherein, ​ The network device receives sixth information sent by the first terminal device, where the sixth information is used to indicate whether the first terminal device correctly receives the first PDSCH.

45. The method of claim 44, wherein, The sixth information is carried in a first transmission resource, and the first information includes configuration information of the first transmission resource.

46. The method of claim 44 or 45, wherein, The sixth information is carried in a first transmission resource, and the first transmission resource is indicated based on first downlink control information (DCI), and the first DCI is carried in the first PDCCH.

47. The method of claim 45, wherein, A transmission resource of the sixth information is determined based on the second information.

48. The method of any one of claims 39-41, wherein, The first PDCCH is used to schedule a first PDSCH, and the first PDSCH includes one or more of the following information: a first uplink grant; timing advance information; second RNTI.

49. The method of claim 48, wherein, The first uplink grant is used to schedule a first physical uplink shared channel (PUSCH), and the first PUSCH is used to request one or more of the following: system information of the first cell; establishment of a radio resource control (RRC) connection; neighbor cell information of the first cell; related information of a paging signal; access to the first cell; time information of the first cell; synchronization information; related information of a synchronization signal.

50. The method of claim 48 or 49, wherein, The method further includes: The network device sends, to the first terminal device, a second PDCCH used to schedule a second PDSCH, and the second PDSCH includes one or more of the following information: system information of the first cell; neighbor cell information of the first cell; related information of a paging signal; confirmation information of access to the first cell; time information of the first cell; synchronization information; related information of a synchronization signal.

51. The method of claim 50, wherein, The second PDCCH is scrambled based on the second RNTI.

52. The method of any one of claims 33-51, wherein, The first cell is configured with a first random access resource set and a second random access resource set, the first random access resource set corresponds to a first threshold, the second random access resource set corresponds to a second threshold, the first threshold and the second threshold are thresholds of signal quality of the first signal or a synchronization signal sent by the first cell, and the first threshold is greater than the second threshold.

53. The method of claim 52, wherein, The method further includes: If the first terminal device accesses the first cell based on a random access resource in the second random access resource set, the network device switches an operation mode of a second cell from a second mode to a first mode or a third mode, where: in the first mode, the first cell sends system information of the first cell based on a request; in the second mode, the first cell does not transmit a signal or a channel; in the third mode, the first cell periodically sends system information of the first cell.

54. The method of claim 52 or 53, wherein, The method further includes: If the first terminal device accesses the first cell based on a random access resource in the second random access resource set, the network device sends, to the first terminal device, seventh information used to configure neighbor cell information of the first cell and / or trigger the first terminal device to perform cell reselection.

55. The method of any one of claims 33-54, wherein, The method further includes: After the first terminal device sends a first random access message or message 1 to the network device, the network device sends eighth information to the first terminal device, where the eighth information is used to instruct the first terminal device to reselect a cell.

56. The method of any one of claims 33-55, wherein, The first signal is associated with a first period and a second period, the first period is used to indicate a time interval between a group of the first signals, and the second period is a time interval between two adjacent first signals in the group of the first signals, and the first period is less than the second period.

57. The method of any one of claims 33-56, wherein: The first signal includes the first information; or The second transmission resource is determined based on a transmission resource of the first signal, and the second transmission resource is used to carry the first information.

58. The method of any one of claims 33-57, wherein, The time domain resource of the first signal is associated with the time domain resource of the second signal.

59. The method of claim 58, wherein, The time domain resource of the first signal is located in the same time slot as the time domain resource of the second signal.

60. The method of any one of claims 33-59, wherein, The first signal is a discovery signal.

61. The method of any one of claims 33-60, wherein, The first signal includes a first sequence, and the first sequence includes identification information of the first cell.

62. The method of any one of claims 33-61, wherein, The second information includes system information of the first cell.

63. A communications device, characterized by The communication device is a first terminal device, and the communication device includes: A first communication unit configured to receive one or more of the following sent by a network device: A first signal used to search for or discover a first cell; First information including configuration information of a transmission resource of a second signal, the second signal being used to request the first cell to send second information. The operation mode of the first cell includes one or more of the following modes:

64. The communication device of claim 63, wherein, A first mode, in which the first cell sends system information of the first cell based on a request; A second mode, in which the first cell does not transmit signals or channels; A third mode, in which the first cell periodically sends system information of the first cell. Whether the first cell is in the first mode is determined based on the first signal or the first information.

65. The communication device of claim 64, wherein, Whether the first cell is in the first mode is determined based on the first signal, including:

66. The communication device of claim 65, wherein, If a sequence in the first signal is a sequence corresponding to the first mode, the first cell is in the first mode; or If a transmission occasion of the first signal is a transmission occasion corresponding to the first mode, the first cell is in the first mode. Whether the first cell is in the first mode is determined based on the first information, including:

67. The communication device of claim 65, wherein, Whether the first cell is in the first mode is determined based on third information, the third information being included in the first information, and the third information being used to indicate a mode in which the first cell is located. The first information further includes fourth information, the fourth information being used to indicate a radio access technology used by the first cell.

68. The communication device of any one of claims 63 to 67, wherein, The communication device further includes:

69. The communication device of any one of claims 63 to 68, wherein, A detection unit configured to detect a first physical downlink control channel (PDCCH) in a first search space after the first terminal device sends the second signal. ​ 70. The communication device of claim 69, wherein, The first information further comprises fifth information, and the fifth information is used for configuring the first search space.

71. The communication device of claim 69 or 70, wherein, The first PDCCH is scrambled based on a first radio network temporary identifier (RNTI), and the first RNTI is determined based on a transmission resource of the second signal.

72. The communication device of any one of claims 69 to 71, wherein, The communication device further comprises: a starting unit, configured to start a first timer after the first terminal device transmits the second signal; a second communication unit, configured to retransmit the second signal if the first timer is expired.

73. The communication device of claim 72, wherein, The second communication unit is configured to: retransmit the second signal if the first timer is expired and a number of times of transmission of the second signal does not reach a first number.

74. The communication device of claim 72 or 73, wherein, The communication device further comprises: a stopping unit, configured to stop the first timer if the first terminal device receives the second information.

75. The communication device of any one of claims 69 to 74, wherein, The first PDCCH is used for scheduling a first physical downlink shared channel (PDSCH), and the first PDSCH or the first PDCCH comprises the second information.

76. The communication device of claim 75, wherein, The first PDSCH further comprises timing advance information of the first terminal device.

77. The communication device of claim 75 or 76, wherein, The communication device further comprises: a third communication unit, configured to transmit sixth information to the network device, and the sixth information is used for indicating whether the first terminal device correctly receives the first PDSCH.

78. The communication device of claim 77, wherein, The sixth information is carried in a first transmission resource, and the first information comprises configuration information of the first transmission resource.

79. The communication device of claim 77 or 78, wherein, The sixth information is carried in a first transmission resource, and the first transmission resource is indicated based on a first downlink control information (DCI), and the first DCI is carried in the first PDCCH.

80. The communications device of claim 77, wherein A transmission resource of the sixth information is determined based on the second information.

81. The communication device of any one of claims 69 to 80, wherein, The first PDCCH is used for scheduling a first PDSCH, and the first PDSCH comprises one or more of the following information: a first uplink grant; timing advance information; a second RNTI.

82. The communication device of claim 81, wherein, The first uplink grant is used for scheduling a first physical uplink shared channel (PUSCH), and the first PUSCH is used for requesting one or more of the following: system information of the first cell; establishing a radio resource control (RRC) connection; neighbor cell information of the first cell; related information of a paging signal; accessing the first cell; time information of the first cell; synchronization information; related information of a synchronization signal.

83. The communication device of claim 81 or 82, wherein, The communication device further comprises: a fourth communication unit, configured to receive a second PDCCH transmitted by the network device, and the second PDCCH is used for scheduling a second PDSCH, and the second PDSCH comprises one or more of the following information: system information of the first cell; neighbor cell information of the first cell; related information of a paging signal; confirmation information of accessing the first cell; time information of the first cell; synchronization information; related information of a synchronization signal.

84. The communication device of claim 83, wherein, The second PDCCH is scrambled based on the second RNTI.

85. The communication device of any one of claims 63 to 84, wherein, The first cell is configured with a first random access resource set and a second random access resource set, the first random access resource set corresponds to a first threshold, the second random access resource set corresponds to a second threshold, the first threshold and the second threshold are thresholds of signal quality of the first signal or a synchronization signal transmitted by the first cell, and the first threshold is greater than the second threshold.

86. The communication device of claim 85, wherein, The communication device further includes: The fifth communication unit is configured to receive seventh information transmitted by the network device if the first terminal device accesses the first cell based on a random access resource in the second random access resource set, and the seventh information is used for configuring neighboring cell information of the first cell and / or triggering the first terminal device to perform cell reselection.

87. The communication device of any one of claims 63-86, wherein, The communication device further includes: The sixth communication unit is configured to receive eighth information transmitted by the network device after the first terminal device transmits a first random access message or message 1 to the network device, and the eighth information is used to instruct the first terminal device to reselect a cell.

88. The communication device of any one of claims 63 to 87, wherein, The first signal is associated with a first period and a second period, the first period is used to indicate a time interval between a group of the first signals, and the second period is a time interval between adjacent two first signals in the group of the first signals, and the first period is less than the second period.

89. The communication device of any one of claims 63 to 88, wherein: The first signal includes the first information; or The second transmission resource is determined based on a transmission resource of the first signal, and the second transmission resource is used to carry the first information.

90. The communication device of any one of claims 63 to 89, wherein, The time domain resource of the first signal is associated with the time domain resource of the second signal.

91. The communication device of claim 90, wherein, The time domain resource of the first signal is located in the same time slot as the time domain resource of the second signal.

92. The communication device of any one of claims 63-91, wherein, The first signal is a discovery signal.

93. The communication device of any one of claims 63-92, wherein, The first signal includes a first sequence, and the first sequence includes identification information of the first cell.

94. The communication device of any one of claims 63 to 93, wherein, The second information includes system information of the first cell.

95. A communications device, characterized by The communication device is a network device, and the communication device includes: The first communication unit is configured to transmit one or more of the following to a first terminal device: A first signal used for searching or discovering a first cell; First information including configuration information of a transmission resource of a second signal, and the second signal is used to request the first cell to transmit second information.

96. The communication device of claim 95, wherein, The operation mode of the first cell includes one or more of the following modes: A first mode, in which the first cell transmits system information of the first cell based on a request; A second mode, in which the first cell does not transmit signals or channels; A third mode, in which the first cell periodically transmits system information of the first cell.

97. The communication device of claim 96, wherein, Whether the first cell is in the first mode is determined based on the first signal or the first information.

98. The communication device of claim 97, wherein, Whether the first cell is in the first mode is determined based on the first signal, including: If a sequence in the first signal is a sequence corresponding to the first mode, the first cell is in the first mode; or, If a sequence in the first signal is a sequence corresponding to the first mode, the first cell is in the first mode; or, If a transmission occasion of the first signal is a transmission occasion corresponding to the first mode, the first cell is in the first mode.

99. The communication device of claim 97, wherein, Whether the first cell is in the first mode is determined based on the first information, including: Whether the first cell is in the first mode is determined based on third information, the third information being included in the first information, and the third information being used to indicate a mode in which the first cell is.

100. The communication device of any one of claims 95 to 99, wherein, The first information further includes fourth information, the fourth information being used to indicate a radio access technology used by the first cell.

101. The communication device of any one of claims 95 to 100, wherein, The communication device further includes: The second communication unit is configured to transmit a first physical downlink control channel (PDCCH) in a first search space after receiving the second signal sent by the first terminal device.

102. The communication device of claim 101, wherein, The first information further includes fifth information, the fifth information being used to configure the first search space.

103. The communication device of claim 101 or 102, wherein, The first PDCCH is scrambled based on a first radio network temporary identifier (RNTI), and the first RNTI is determined based on a transmission resource of the second signal.

104. The communication device of any one of claims 101 to 103, wherein, The first PDCCH is used to schedule a first physical downlink shared channel (PDSCH), and the first PDSCH or the first PDCCH includes the second information.

105. The communication device of claim 104, wherein, The first PDSCH further includes timing advance information of the first terminal device.

106. The communication device of claim 104 or 105, wherein, The communication device further includes: The third communication unit is configured to receive sixth information sent by the first terminal device, the sixth information being used to indicate whether the first terminal device correctly receives the first PDSCH.

107. The communication device of claim 106, wherein, The sixth information is carried in a first transmission resource, and the first information includes configuration information of the first transmission resource.

108. The communication device of claim 106 or 107, wherein, The sixth information is carried in a first transmission resource, and the first transmission resource is indicated based on a first downlink control information (DCI), and the first DCI is carried in the first PDCCH.

109. The communication device of claim 106, wherein, A transmission resource of the sixth information is determined based on the second information.

110. The communication device of any one of claims 101 to 103, wherein, The first PDCCH is used to schedule a first PDSCH, and the first PDSCH includes one or more of the following information: A first uplink grant; Timing advance information; A second RNTI.

111. The communication device of claim 110, wherein, The first uplink grant is used to schedule a first physical uplink shared channel (PUSCH), and the first PUSCH is used to request one or more of the following: System information of the first cell; Establishment of a radio resource control (RRC) connection; Neighbor cell information of the first cell; Related information of a paging signal; Access to the first cell; Time information of the first cell; Synchronization information; Related information of a synchronization signal.

112. The communication device of claim 110 or 111, wherein, The communication device further includes: The fourth communication unit is configured to send a second PDCCH to the first terminal device, the second PDCCH being used to schedule a second PDSCH, and the second PDSCH including one or more of the following information: System information of the first cell; Neighbor cell information of the first cell; Related information of a paging signal; Confirmation information of access to the first cell; Time information of the first cell; Synchronization information; Related information of a synchronization signal.

113. The communication device of claim 112, wherein, The second PDCCH is scrambled based on the second RNTI.

114. The communication device of any one of claims 95 to 113, wherein, The first cell is configured with a first random access resource set and a second random access resource set, the first random access resource set corresponds to a first threshold, the second random access resource set corresponds to a second threshold, the first threshold and the second threshold are thresholds of signal quality of the first signal or a synchronization signal sent by the first cell, and the first threshold is greater than the second threshold.

115. The communication device of claim 114, wherein, The communication device further includes: A switching unit, configured to switch an operation mode of a second cell from a second mode to a first mode or a third mode if the first terminal device accesses the first cell based on a random access resource in the second random access resource set. In the first mode, the first cell sends system information of the first cell based on a request; In the second mode, the first cell does not transmit signals or channels; In the third mode, the first cell periodically sends system information of the first cell.

116. The communication device of claim 114 or 115, wherein, The communication device further includes: A fifth communication unit, configured to send seventh information to the first terminal device if the first terminal device accesses the first cell based on a random access resource in the second random access resource set, the seventh information being used for configuring neighbor cell information of the first cell and / or triggering the first terminal device to perform cell reselection.

117. The communication device of any one of claims 95 to 116, wherein, The communication device further includes: A sixth communication unit, configured to send eighth information to the first terminal device after the first terminal device sends a first random access message or message 1 to the network device, the eighth information being used for instructing the first terminal device to reselect a cell.

118. The communication device of any of claims 95 to 117, wherein, The first signal is associated with a first period and a second period, the first period is used to indicate a time interval between a group of the first signals, and the second period is a time interval between two adjacent first signals in the group of the first signals, and the first period is less than the second period.

119. The communication device of any one of claims 95-118, wherein: The first signal includes the first information; or The second transmission resource is determined based on a transmission resource of the first signal, and the second transmission resource is used to carry the first information.

120. The communication device of any one of claims 95 to 119, wherein, The time domain resource of the first signal is associated with the time domain resource of the second signal.

121. The communication device of claim 120, wherein, The time domain resource of the first signal is located in the same time slot as the time domain resource of the second signal.

122. The communication device of any one of claims 95 to 121, wherein, The first signal is a discovery signal.

123. The communication device of any one of claims 95 to 122, wherein, The first signal includes a first sequence, and the first sequence includes identification information of the first cell.

124. The communication device of any one of claims 95 to 123, wherein, The second information includes system information of the first cell.

125. A communications device, characterized by A device including a transceiver, a memory, and a processor, the memory being used to store a program, the processor being used to invoke the program in the memory and control the transceiver to receive or send signals, so that the terminal device performs the method in any one of claims 1-62.

126. An apparatus, comprising: A device including a processor, used to invoke a program from a memory, so that the device performs the method in any one of claims 1-62.

127. A chip, comprising: including a processor to call a program from a memory to cause a device in which the chip is installed to perform the method of any of claims 1 to 62.

128. A computer-readable storage medium, characterized in that, having a program stored thereon, the program causing a computer to perform the method of any of claims 1 to 62.

129. A computer program product, characterized in that, including a program that causes a computer to perform the method of any of claims 1 to 62.

130. A computer program, characterized in that, The computer program causes a computer to perform the method of any of claims 1 to 62. The computer program causes a computer to perform the method of any of claims 1 to 62.

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