Wireless communication method and apparatus, and device and storage medium

Abstract

A wireless communication method and apparatus, and a device and a storage medium, which relate to the technical field of communications. The method comprises: a first network device sending first configuration information and / or second configuration information to a terminal device in a first cell, wherein the first configuration information is used for monitoring a paging message of the first cell, and the second configuration information is used for acquiring system configuration information of a second cell (410). In the method, on the basis of requirements, a terminal device can flexibly choose to camp on a first cell and / or access a second cell. When the terminal device only has a requirement for camping on a cell, the terminal device can monitor a paging message of the first cell, so as to acquire an important network notification in a timely manner. In this case, the second cell of a second network device can be disabled, thereby reducing the energy consumption of the second network device. When the terminal device has a data transmission requirement, the terminal device can access the second cell, thereby ensuring that the data transmission requirement of the terminal device is met.

Description

Wireless communication methods, apparatus, devices and storage media Technical Field

[0001] This application relates to the field of communication technology, and in particular to a wireless communication method, apparatus, device, and storage medium. Background Technology

[0002] With the development of wireless communication technology, the demand for Network Energy Saving (NES) has emerged. Network energy saving is of great significance for environmental sustainability, reducing environmental impact (reducing greenhouse gas emissions), and saving operating costs.

[0003] When there are no terminal devices in the cell that need to provide services, the network device can shut down the entire cell to save network energy.

[0004] However, energy savings in network equipment can lead to a decrease in the communication performance of terminal devices. Further research is needed on how to turn on a cell to provide service to a terminal device that enters its coverage area when the cell is in a closed state.

[0005] Summary of the Invention

[0006] This application provides a wireless communication method, apparatus, device, and storage medium. The technical solutions provided by this application are as follows:

[0007] According to one aspect of the embodiments of this application, a wireless communication method is provided, the method being executed by a terminal device, wherein the first network device is a network device in a first cell, the method comprising:

[0008] The system receives first configuration information and / or second configuration information sent by the first network device. The first configuration information is used to listen to paging messages from the first cell, and the second configuration information is used to obtain system configuration information from the second cell.

[0009] According to one aspect of the embodiments of this application, a wireless communication method is provided, the method being performed by a first network device, wherein the first network device is a network device in a first cell, the method comprising:

[0010] Send first configuration information and / or second configuration information to the terminal device in the first cell. The first configuration information is used to listen for paging messages in the first cell, and the second configuration information is used to obtain system configuration information of the second cell.

[0011] According to one aspect of the embodiments of this application, a wireless communication device is provided, the device comprising:

[0012] The receiving module is configured to receive first configuration information and / or second configuration information sent by a first network device. The first configuration information is used to listen for paging messages in a first cell, and the second configuration information is used to obtain system configuration information of a second cell. The first network device is a network device in the first cell.

[0013] According to one aspect of the embodiments of this application, a wireless communication device is provided, the device comprising:

[0014] The sending module is used to send first configuration information and / or second configuration information to terminal devices in the first cell. The first configuration information is used to listen for paging messages in the first cell, and the second configuration information is used to obtain system configuration information of the second cell. The first network device is a network device in the first cell.

[0015] According to one aspect of the embodiments of this application, a communication device is provided, the communication device including a processor and a memory, the memory storing a computer program, the processor executing the computer program to implement the wireless communication method executed by the terminal device described above, or to execute the wireless communication method executed by the first network device described above.

[0016] According to one aspect of the embodiments of this application, a computer-readable storage medium is provided, the storage medium storing a computer program, the computer program being executed by a processor to implement the wireless communication method executed by the terminal device described above, or to execute the wireless communication method executed by the first network device described above.

[0017] According to one aspect of the embodiments of this application, a chip is provided, the chip including programmable logic circuits and / or program instructions, which, when the chip is running, are used to implement the wireless communication method executed by the aforementioned terminal device, or to execute the wireless communication method executed by the aforementioned first network device.

[0018] According to one aspect of the embodiments of this application, a computer program product is provided, the computer program product including computer instructions stored in a computer-readable storage medium, wherein a processor reads from the computer-readable storage medium and executes the computer instructions to implement the wireless communication method executed by the terminal device or to execute the wireless communication method executed by the first network device.

[0019] The technical solutions provided in this application embodiment may have the following beneficial effects:

[0020] Terminal devices can flexibly choose to camp on the first cell and / or access the second cell as needed. Specifically, when the terminal device only needs to camp on a cell, on the one hand, it can listen for paging messages in the first cell based on the first configuration information, enabling it to promptly obtain important network notifications. On the other hand, the second cell of the second network device can be shut down at this time, thereby saving the energy consumption of the second network device. When the terminal device has data transmission needs, it can use the second configuration information sent by the first network device to obtain the system configuration information of the second cell to access the second cell, thereby ensuring that the data transmission needs of the terminal device are met. Attached Figure Description

[0021] Figure 1 is a schematic diagram of the architecture of a communication system provided in an embodiment of this application;

[0022] Figure 2 is a schematic diagram of the architecture of a communication system provided in another embodiment of this application;

[0023] Figure 3 is a schematic diagram of the architecture of a communication system provided in another embodiment of this application;

[0024] Figure 4 is a flowchart of a wireless communication method provided in an embodiment of this application;

[0025] Figure 5 is a flowchart of a wireless communication method provided in an embodiment of this application when the second cell is in a closed state;

[0026] Figure 6 is a flowchart of a wireless communication method provided in another embodiment of this application when the second cell is in a closed state;

[0027] Figure 7 is a flowchart of a wireless communication method provided in an embodiment of this application when the second cell is in a non-off state;

[0028] Figure 8 is a flowchart of a wireless communication method provided in another embodiment of this application when the second cell is in a non-off state;

[0029] Figure 9 is a block diagram of a wireless communication device provided in an embodiment of this application;

[0030] Figure 10 is a block diagram of a wireless communication device provided in another embodiment of this application;

[0031] Figure 11 is a schematic diagram of the structure of a communication device provided in an embodiment of this application. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0033] The network architecture and business scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0034] The technical solutions of this application embodiment can be applied to various communication systems, such as: Global System for Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, evolution of NR system, LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), and Wireless Fidelity (WF). Fidelity (WiFi), 5th-Generation (5G) communication systems, 6th-Generation (6G) communication systems, or other communication systems.

[0035] Traditional communication systems typically support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication but also, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication. The embodiments of this application can also be applied to these communication systems.

[0036] The communication system in this application embodiment can be applied to carrier aggregation (CA) scenarios, dual connectivity (DC) scenarios, and standalone (SA) network deployment scenarios.

[0037] The communication system in this application embodiment can be applied to unlicensed spectrum, wherein unlicensed spectrum can also be considered as shared spectrum; or, the communication system in this application embodiment can also be applied to licensed spectrum, wherein licensed spectrum can also be considered as non-shared spectrum.

[0038] Communication system scenarios include non-terrestrial networks (NTN) and terrestrial networks (TN). NTN typically uses satellite communication to provide services to terrestrial users. Current NTN systems include NR-NTN and IoT-NTN systems, and other NTN systems may be included in the future.

[0039] For example, Figure 1 is a schematic diagram of the architecture of a communication system provided in an embodiment of this application. As shown in Figure 1, the communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120. The network device 110 can provide communication coverage for a specific geographical area and can communicate with terminal devices located within that coverage area.

[0040] Figure 1 exemplarily illustrates a network device 110 and two terminal devices 120. In some embodiments of this application, the communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within its coverage area. This application does not limit this aspect.

[0041] For example, Figure 2 is a schematic diagram of another communication system architecture provided in an embodiment of this application. Referring to Figure 2, the communication system may include a terminal device 201 and a satellite 202, and wireless communication is possible between the terminal device 201 and the satellite 202. The network formed between the terminal device 201 and the satellite 202 may also be called an NTN. In the architecture of the communication system shown in Figure 2, the satellite 202 may have the function of a base station, and the terminal device 201 and the satellite 202 can communicate directly. In this system architecture, the satellite 202 can be referred to as a network device. In some embodiments of this application, the communication system may include multiple satellites 202, and the coverage area of ​​each network satellite 202 may include other numbers of terminal devices; this application does not limit this aspect.

[0042] For example, Figure 3 is a schematic diagram of another communication system architecture provided in an embodiment of this application. Referring to Figure 3, the communication system includes a terminal device 301, a satellite 302, and a base station 303. Wireless communication is possible between the terminal device 301 and the satellite 302, and communication is possible between the satellite 302 and the base station 303. The network formed between the terminal device 301, the satellite 302, and the base station 303 can also be called an NTN. In the architecture of the communication system shown in Figure 3, the satellite 302 may not have the function of a base station, and communication between the terminal device 301 and the base station 303 requires relaying through the satellite 302. In this system architecture, the base station 303 can be referred to as a network device. In some embodiments of this application, the communication system may include multiple base stations 303, each base station 303 can communicate with one or more satellites 302, and the coverage area of ​​each satellite 302 may include other numbers of terminal devices; this application does not limit this aspect.

[0043] In future communication systems such as B5G (Beyond 5G) or 6G, there may also be distributed multiple-input multiple-output (MIMO, also known as distributed antenna system) scenarios and / or massive multiple-input multiple-output (MIMO, also known as massive antenna matrix system) scenarios. In some cases, distributed MIMO and / or massive MIMO can also support cell-free or UE-centric network deployment scenarios. It should be understood that the above scenarios also apply to TN and / or NTN.

[0044] Understandably, with the development of communication technology, future communication systems such as B5G or 6G can support TN or NTN, as well as network deployment scenarios centered on base stations or terminal-centered.

[0045] The terminal device mentioned in the embodiments of this application may refer to UE (User Equipment), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, wireless communication device, user agent, or user device. Optionally, the terminal device 10 may also be a cellular phone, cordless phone, SIP (Session Initiation Protocol) phone, WLL (Wireless Local Loop) station, PDA (Personal Digital Assistant), handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, vehicle-mounted device, wearable device, terminal device in 5GS (5th Generation System), or terminal device in the future evolved PLMN (Public Land Mobile Network), etc., and the embodiments of this application are not limited thereto. For ease of description, the devices mentioned above are collectively referred to as terminal devices. In the embodiments of this application, "terminal device" and "UE" are usually used interchangeably, but those skilled in the art will understand that they can express the same meaning.

[0046] The network devices mentioned in the embodiments of this application can be access network devices, which can be located on the ground or on a satellite. An access network device is a device deployed in an access network to provide wireless communication functions for terminal devices. Access network devices can include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems employing different wireless access technologies, the names of devices with access network device functions may differ; for example, in a 5G NR system, they are called gNodeB or gNB. As communication technologies evolve, the name "access network device" may change. For ease of description, in the embodiments of this application, the aforementioned devices providing wireless communication functions for terminal devices are collectively referred to as access network devices. Optionally, a communication relationship can be established between the terminal device and the core network device through the access network device.

[0047] The "5G NR system" in this application embodiment can also be referred to as a 5G system or an NR system, but those skilled in the art will understand its meaning. The technical solutions described in this application embodiment can be applied to LTE systems, 5G NR systems, and subsequent evolution systems of 5G NR systems (such as 6G systems), as well as other communication systems such as NB-IoT (Narrow Band Internet of Things) systems. This application does not limit these applications.

[0048] In this embodiment, the network device can provide services to a cell. The terminal device communicates with the network device through the transmission resources (e.g., frequency domain resources, or spectrum resources) on the carrier used by the cell. The cell can be the cell corresponding to the network device (e.g., a base station). The cell can belong to a macro base station or to a base station corresponding to a small cell. The small cell can include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-speed data transmission services.

[0049] Before introducing the technical solution of this application, some related technical knowledge involved in this application will be introduced and explained. The following related technologies are optional solutions and can be arbitrarily combined with the technical solutions of the embodiments of this application, all of which fall within the protection scope of the embodiments of this application. The embodiments of this application include at least some of the following contents.

[0050] 1. Network energy saving

[0051] Network energy efficiency is crucial for environmental sustainability, reducing environmental impact (such as greenhouse gas emissions), and saving operating costs. As 5G becomes more widespread across industries and geographic regions, the need to support very high data transmission rates to handle more advanced services and applications (such as XR) necessitates denser network deployments, utilizing more antennas, greater bandwidth, and more frequency bands. Given the environmental impact of 5G, there is a need to develop controlled, new solutions to enhance network energy efficiency.

[0052] Energy consumption has become a critical component of operators' operational expenditure (OPEX). According to a report by the GSMA (Global System for Mobile Communications Association), energy costs for mobile networks account for approximately 23% of total OPEX. Most energy consumption originates from the radio access network, more specifically from the active antenna unit (AAU), with data centers and fiber optic transmission accounting for a smaller share. The power consumption of a single radio access can be divided into two parts: the dynamic part includes only the power consumption when data is being transmitted or received; the static part includes the power consumption necessary for the necessary operation of the radio access equipment at all times, including when no data is being transmitted or received.

[0053] With the development of communication technology and the evolution of communication systems, energy consumption has gradually become an important KPI (Key Performance Indicator) for the operating efficiency of communication systems. Therefore, network energy-saving technologies need to be considered when designing 6G communication systems.

[0054] Initial Access in a 2.5G NR System

[0055] In NR systems, the initial access process for terminal devices can be completed by detecting the Synchronization Signal / PBCH Block (SSB or SS / PBCH block) on the Sync Raster. The SSB is transmitted through a Discovery Burst Transmission Window or an SSB transmission opportunity window. These windows occur periodically, and the period can be configured by the network device using higher-layer parameters. During the initial access process, the terminal device attempts to search for SSBs based on their predefined possible time-frequency locations. The detected SSBs provide time and frequency synchronization, radio frame timing, and the cell ID.

[0056] One primary function of the SSB index is to allow the UE to obtain system timing information. Besides this, the SSB index also serves another function: indicating the quasi-co-location (QCL) relationship between SSBs, or in other words, indicating beam direction. QCL refers to the fact that the large-scale parameters of the channel experienced by a symbol on one antenna port can be inferred from the channel experienced by a symbol on another antenna port. These large-scale parameters can include delay spread, average delay, Doppler spread, Doppler shift, and spatial reception parameters. Specifically, in a 5G NR system, SSBs carried by different beams constitute an SSB burst set. Different SSB indices correspond to the time-domain location information of different SSBs within the burst set, and also to the specific SSB transmission beam information. SSBs with the same SSB index can be considered to have a QCL relationship; or, in other words, SSBs with the same SSB index experience the same or similar large-scale parameters of the channel. The UE can assume that the network device uses the same beam to transmit these SSBs; there is no QCL relationship between SSBs corresponding to different SSB indices, because they may come from different transmission beams of the network device and have experienced different channel transmission characteristics.

[0057] After detecting an SSB, the terminal device can determine the configuration of the Type0-PDCCH (Physical Downlink Control Channel) CSS (Common Search Space) set through the MIB (Master Information Block) message in the SSB. The terminal device can receive network device scheduling of SIB1 (System Information Block 1) messages by listening to the Type0-PDCCH CSS set. Both the MIB and SIB1 messages include the serving cell's system configuration information. Furthermore, the terminal device can receive network device scheduling of other system messages besides SIB1 messages by listening to the Type0A-PDCCH CSS set, receive network device scheduling of paging messages by listening to the Type2-PDCCH CSS set, and receive Paging Early Indication (PEI) information for paging messages sent by the network device by listening to the Type2A-PDCCH CSS set.

[0058] The terminal device can also obtain the resource configuration for PRACH (Physical Random Access Channel) transmission opportunities (RO) during the random access process based on the received cell system message SIB1. RO is the time-frequency resource carrying the random access preamble (also known as PRACH). If two-step RACH (Random Access Channel) transmission is supported, the resource configuration during the random access process also includes PUSCH (Physical Uplink Shared Channel) resource configuration, also known as PUSCH transmission opportunities (PO). In the two-step RACH, message A (MsgA) includes MsgA PRACH and MsgA PUSCH. RO is the time-frequency resource used to carry MsgA PRACH, and PO is the time-frequency resource used to carry MsgA PUSCH.

[0059] A key feature of the NR system is its support for downlink multi-beaming, where different SSBs are associated with different beams. Before a terminal device initiates random access, it measures and evaluates the signal quality of the cell and the signal strength of each SSB within it. If the detected SSB signal strength exceeds a threshold, the strongest or relatively strong SSB is identified. For example, if the terminal device determines SSB#1 as the strongest SSB, it determines the corresponding PRACH transmission opportunity for SSB#1 as RO#1 based on the mapping relationship between SSBs and ROs, and transmits the PRACH on RO#1. If the network device successfully receives the PRACH, it can determine the SSB selected by the terminal device based on the resource information from the successful reception. For instance, the network device can determine that the PRACH is associated with SSB#1 based on the association relationship, and thus determine the beam information for subsequent communication based on SSB#1.

[0060] In addition, based on the RO resources configured by the network device, the terminal device can also request system messages to be sent from the network device. The system messages that the terminal device requests to be sent from the network device can be other system messages besides SIB1, such as SIB2, SIB3, SIB4, SIB5, SIB6, SIB7, SIB8, SIB9, SIB10, SIB11, SIB12, SIB13, SIB14, SIB15, SIB16, SIB17, SIB18, SIB19, SIB20, SIB21, etc.

[0061] With the development of communication technology, research on 6G communication technology has begun. Considering the importance of network energy conservation, possible energy-saving solutions need to be considered from the initial design stage of 6G communication technology. From an energy-saving perspective, network equipment should minimize the transmission of "always-on" signals to avoid potentially unnecessary energy consumption. In extreme cases, such as when there are no terminal devices requiring service in a cell, the network equipment can shut down the entire cell. However, energy saving by the network equipment will lead to a decrease in the communication performance of terminal devices. How to turn the cell back on to provide service to a terminal device that enters the coverage area of ​​a cell while it is in a shut-down state is a problem that needs to be solved.

[0062] Please refer to Figure 4, which shows a flowchart of a wireless communication method provided in one embodiment of this application. This method can be applied to the network architectures shown in Figures 1 to 3, as well as other network architectures. As shown in Figure 4, the method may include the following step 410:

[0063] Step 410: The first network device sends first configuration information and / or second configuration information to the terminal device in the first cell. The first configuration information is used to listen for paging messages in the first cell, and the second configuration information is used to obtain system configuration information of the second cell.

[0064] Accordingly, the terminal device receives the first configuration information and / or the second configuration information sent by the first network device.

[0065] In some embodiments, the network device in the first cell is a first network device, and the network device in the second cell is a second network device. In some embodiments, the first network device and the second network device are the same network device. In some embodiments, the first network device and the second network device are different network devices.

[0066] In some embodiments, the state of a terminal device may include a connected state and a disconnected state, wherein the disconnected state may include an idle state and / or an inactive state. In some embodiments, when the terminal device only needs to camp on a cell, it can be in a disconnected state to save power. When the terminal device needs to transmit data, it can be in a connected state to enable communication transmission.

[0067] In some embodiments, when the terminal device is in an idle or disconnected state, the terminal device listens for paging messages in the first cell according to the first configuration information. By listening for paging messages in the first cell, the terminal device can save terminal power consumption while also obtaining important network notifications in a timely manner.

[0068] In some embodiments, when a terminal device receives a paging message from a first cell, and the paging message is used to page the terminal device, the terminal device determines whether to enter a connected state from an idle state or a disconnected state. For example, when there is an incoming call, SMS message, or data request, the first cell sends a paging message. When the terminal device determines that the paging message is used to page its own device, the terminal device responds to the paging message and enters a connected state from a disconnected state to handle the upcoming communication needs.

[0069] In some embodiments, when the terminal device determines that it is transitioning from an idle state or a disconnected state to a connected state, the terminal device accesses the second cell according to the second configuration information. By accessing the second cell, the terminal device ensures its data transmission needs. In some embodiments, after accessing the second cell, the terminal device may not need to listen for paging messages from the first cell. In some embodiments, after accessing the second cell, the terminal device may also continue to listen for paging messages from the first cell.

[0070] In some embodiments, the terminal device may also access the first cell when it determines that it has entered a connected state from an idle state or a disconnected state. This application does not limit this.

[0071] In some embodiments, when a terminal device switches from a connected state to an idle state or a disconnected state, the terminal device listens for paging messages in the first cell according to the first configuration information. For example, when a terminal device accesses a second cell, if there is no data transmission requirement for an extended period, the terminal device can return to the first cell to camp, and the second cell can be shut down to conserve energy for both the network and the terminal. For example, when there are no terminal devices in the second cell, or the number of terminal devices in the second cell is small, or there are no terminal devices with high-priority services in the second cell, the second network device can switch the terminal device to the first cell, and the second cell can be shut down. For example, the second network device can monitor the status and number of terminal devices in the second cell in real time. When the number of terminal devices in the second cell is too small, or there are no active high-priority services, the second network device can switch the terminal device to the first cell, and the second cell can be shut down to save energy consumption for the second network device.

[0072] In some embodiments, the cell state can include a shutdown state and a normal operating state. When the cell is in the shutdown state, the unit (network device) shuts down most of its hardware, and in this state, the unit does not send any signals / channels, but may retain the ability to receive specific wake-up signals so that it can be quickly turned on again when needed. The normal operating state can include a basic mode state and an active mode state. In the basic mode state, the cell periodically sends discovery signals, while all other signals or channels are sent on demand. When the cell is in the active mode state, the cell has normal communication functions, including the cell frequently sending system information on signals or channels. As can be seen from the above, when the cell is in the shutdown state, most communication functions are disabled, and the network device puts most of its hardware into a low-power state or shuts it down, thereby saving network power consumption.

[0073] As shown above, to conserve network energy, if the terminal device only needs to reside in the designated cell (i.e., does not require high-speed data transmission), the second cell can be in energy-saving mode, such as being off, to conserve the energy of the second network device. If the terminal device requires high-speed data transmission, the second cell should be activated to ensure that the terminal device can access the second cell through the first cell, thus ensuring the terminal device's data transmission needs are met.

[0074] In some embodiments, the first cell provides wide coverage and mobility management for the terminal device, while the second cell provides high-speed data transmission for the terminal device. In some embodiments, the first cell is the terminal device's camping cell (cCell), and the second cell is the terminal device's transmission cell (tCell). The camping cell provides basic network services to the terminal device, such as paging, mobility management, and cell reselection, to ensure that the terminal device can quickly reconnect when data transmission is required. The transmission cell provides higher data transmission rates and lower latency to ensure data interaction with the terminal device.

[0075] In some embodiments, the terminal device includes multiple camping cells, one of which may be a primary camping cell, and the other camping cells may be secondary camping cells. In some embodiments, the terminal device includes multiple transmission cells, one of which may be a primary transmission cell, and the other transmission cells may be secondary transmission cells. In some embodiments, the first cell is the terminal device's primary camping cell (cPCell), and the second cell is the terminal device's primary transmission cell (tPCell).

[0076] For example, since the first cell is the terminal device's designated cell or primary cell, when the terminal device is in an idle or disconnected state, i.e., when the terminal device only needs to be hosted, it will reside in the first cell. For example, since the second cell is the terminal device's transmission cell or primary transmission cell, when the terminal device is in a connected state, i.e., when the terminal device has data transmission needs, it will access the second cell. For example, the terminal device corresponds to a primary cell group, which includes at least the first primary cell and the second primary cell. The first primary cell can be a designated primary cell, and the second primary cell can be a transmission primary cell.

[0077] In some embodiments, the first cell is a partial primary cell (pPCell) of the terminal device, and the second cell is the primary cell (PCell, PCell) of the terminal device. In some embodiments, the first cell is the primary cell of the terminal device, and the second cell is a partial primary cell of the terminal device.

[0078] In some embodiments, when the terminal device is in a connected state and the system configuration information of the first cell changes, the second network device sends the updated system configuration information of the first cell to the terminal device using the time-frequency resources of the second cell. Accordingly, the terminal device receives the updated system configuration information of the first cell sent by the second network device.

[0079] In some embodiments, when the terminal device is in a connected state and the system configuration information of the first cell changes, the first network device sends the updated system configuration information of the first cell to the terminal device through the time-frequency resources of the first cell. Accordingly, the terminal device receives the updated system configuration information of the first cell sent by the first network device.

[0080] In some embodiments, the first network device can be a network device in an NTN, and the second network device can be a network device in a TN. For example, the first network device can be base station 1, the second network device can be base station 2, and the terminal device can be UE1. Network devices in an NTN can achieve wide network coverage, while network devices in a TN can provide high-speed data transmission. This method allows the terminal device to connect to a TN cell (second cell) when high-speed data transmission is needed, and to switch back to the more widely covered NTN cell (first cell) when high-speed data transmission is not needed. In some embodiments, both the first and second network devices can be network devices in a TN. In some embodiments, both the first and second network devices can be network devices in an NTN.

[0081] In some embodiments, the first cell can be a cell in a 5G network, and the second cell can be a cell in a 6G network. For example, the first cell is an NTN cell in a 5G network, and the second cell is a TN cell in a 6G network. In some embodiments, both the first cell and the second cell can be cells in a 6G network. In some embodiments, both the first cell and the second cell can be cells in a 5G network.

[0082] In summary, the technical solution provided in this application allows the terminal device to flexibly choose to camp on a first cell and / or access a second cell as needed. Specifically, when the terminal device only needs to camp on a cell, on the one hand, the terminal device can listen to paging messages in the first cell based on the first configuration information, and can obtain important network notifications in a timely manner. On the other hand, the second cell of the second network device can be turned off at this time, thereby saving the energy consumption of the second network device. When the terminal device has data transmission needs, it can use the second configuration information sent by the first network device to obtain the system configuration information of the second cell to access the second cell, thereby ensuring that the data transmission needs of the terminal device are met.

[0083] The first configuration information is described below.

[0084] In some embodiments, the first configuration information is used to determine the resource configuration information of the first time-frequency resource.

[0085] In some embodiments, the resource configuration information of the first time-frequency resource can be used to indicate parameters such as the frequency range, time period, modulation method, coding method, and power level of the first time-frequency resource, in order to optimize network performance and ensure that the terminal device can listen to the first time-frequency resource at a specified frequency and time.

[0086] In some embodiments, the configuration information of the first time-frequency resource can be dynamically adjusted according to the load of the first cell, network topology, and user needs, so as to better utilize the wireless resources.

[0087] In some embodiments, the first time-frequency resource is used by the terminal device to listen for paging messages in the first cell. In some embodiments, the paging message is used to notify the terminal device of new information or signals that require a response, and to wake up the terminal device in the wireless network so that the terminal device can enter a higher power state to handle subsequent data communication.

[0088] In some embodiments, the first time-frequency resource is used to transmit at least one of the following: a shared channel carrying paging messages, a control channel carrying control information for scheduling paging message transmission, and a control channel carrying control information indicating whether to receive paging messages. Exemplarily, the first time-frequency resource can be used to transmit shared information carrying paging messages, i.e., the first time-frequency resource is used to transmit a paging PDSCH (Physical Downlink Shared Channel), which includes paging messages. Exemplarily, the first time-frequency resource can be used to transmit a control channel carrying control information for scheduling paging message transmission, i.e., the first network device transmits a paging PDCCH (Physical Downlink Control Channel) on the first time-frequency resource. This PDCCH is used to instruct a terminal device to receive a paging PDSCH on a specific time-frequency resource. The terminal device can receive the paging PDSCH on the specified time-frequency resource by listening to the paging PDCCH, which is used to transmit paging messages. For example, the first time-frequency resource can be used to transmit a control channel carrying control information indicating whether a paging message is received. For instance, the first network device transmits a PDCCH on the first time-frequency resource. When the PDCCH is used to instruct the terminal device to receive a paging PDSCH, the terminal device can listen for the paging PDSCH on the specified time-frequency resource. Alternatively, when the PDCCH is used to instruct the terminal device not to receive the PDSCH, in this case, the terminal device does not listen for the paging PDSCH.

[0089] In some embodiments, the first configuration information is used to determine at least one of the following: (1) the time domain location of the first time-frequency resource, (2) the frequency domain location of the first time-frequency resource, (3) the identifier of the BWP (Bandwidth Part) where the first time-frequency resource is located, (4) the frequency domain location of the BWP where the first time-frequency resource is located, and (5) the period corresponding to the first time-frequency resource.

[0090] (1,2) Time-frequency resources include time-domain resources and frequency-domain resources. Time-domain resources refer to transmission resources that are divided and managed over time, and can be time slots, symbols, frames, subframes, etc. Frequency-domain resources refer to a frequency range used for data transmission, and can be frequency bands, frequency zones, subcarriers, BWPs, grids, bandwidths, RBs (Resource Blocks), RBGs (Resource Block Groups), sub-bands, etc. Time-domain location refers to a specific point in time or time period, such as the location of a time slot. Frequency-domain location refers to the location of a specific frequency point or frequency segment within a specific frequency range, such as the location of a subcarrier or resource block.

[0091] For example, the first configuration information is used to indicate the time domain location and the frequency domain location of the first time-frequency resource. That is, the first configuration information is used to indicate the time-frequency location of the first time-frequency resource, and the terminal device can listen to the paging PDCCH and / or paging PDSCH sent by the first network device at the time-frequency location.

[0092] For example, the time-domain location information of the first time-frequency resource includes at least one of the following: the offset between the time-domain start position of the first time-frequency resource and the start position of the period corresponding to the first time-frequency resource, the time-domain start position of the first time-frequency resource, and the number of time-domain units included in the first time-frequency resource (e.g., the number of symbols included in the first time-frequency resource).

[0093] For example, the frequency domain location information of the first time-frequency resource includes at least one of the following: the frequency domain starting position of the first time-frequency resource, and the number of frequency domain units included in the first time-frequency resource (e.g., the number of resource blocks included in the first time-frequency resource).

[0094] (3) The identifier of a BWP is an identifier used to uniquely identify a BWP and distinguish different BWPs. There can be a one-to-one correspondence between a BWP and its identifier, with one BWP corresponding to one identifier and different BWPs corresponding to different identifiers. For example, the first configuration information can be used to indicate the identifier of the BWP where the first time-frequency resource is located, so that the terminal device can determine the BWP where the first time-frequency resource is located.

[0095] (4) The frequency domain position of the BWP refers to the specific frequency range or location occupied by the BWP. For example, the frequency domain position of the BWP can be determined by at least one of the following: the frequency domain starting position of the BWP, the resource block allocation of the BWP, and the offset. The offset refers to the offset relative to the frequency domain starting position of the BWP, and the unit of the offset can be RB, subcarrier, etc., which is not limited in this application. For example, if the first configuration information is used to indicate the frequency domain starting position and offset of the BWP, the terminal device can determine the frequency domain range of the BWP.

[0096] (5) The period corresponding to the first time-frequency resource refers to the repetition period of the first time-frequency resource in the time domain, that is, the time interval of the resource transmission, and the unit can be milliseconds. For example, the first configuration information can be used to indicate the period corresponding to the first time-frequency resource, so that the terminal device periodically listens to the first time-frequency resource.

[0097] In some embodiments, the first configuration information is used to determine at least one of the following: (6) the index of a first reference signal, the first reference signal including the synchronization channel or signal of the first cell, or the first reference signal used by the terminal device to complete time-frequency synchronization with the first cell; (7) the cell identifier of each cell in the first cell list; (8) the mapping relationship between the index of the first reference signal and the cell identifier of the cell in the first cell list; wherein the first cell list includes a second cell.

[0098] (6) First Reference Signal: The synchronization channel or signal of the first cell refers to a specific communication channel or signal in a wireless communication system used to assist the terminal device in time-domain and frequency-domain synchronization with the first network device. For example, the synchronization signal may include a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). The PSS provides time-domain synchronization information; upon detecting the PSS, the terminal device can obtain the time reference point of the first network device, thereby performing clock synchronization. The PSS and SSS can also provide frequency-domain synchronization information. By decoding the PSS and SSS, the terminal device can determine the frequency offset of the first network device and make corresponding corrections.

[0099] For example, the index of the first reference signal can be the SSB index. It can be understood that there is a one-to-one correspondence between the SSB and its index, that is, one SSB corresponds to one index, and different SSBs correspond to different indices.

[0100] For example, the first reference signal includes an SSB, and the first configuration information indicates that the index of the first reference signal is {SSB#0, SSB#1, SSB#2, SSB#3}, that is, the SSBs transmitted by the first cell are SSB#0, SSB#1, SSB#2, and SSB#3. The terminal device can complete time-frequency synchronization with the first cell based on at least one of the SSBs SSB#0, SSB#1, SSB#2, and SSB#3.

[0101] In some embodiments, the terminal device performs signal quality assessment on multiple SSBs. The assessment may include at least one of the following: signal strength, signal-to-noise ratio, bit error rate, latency, etc. Based on the signal quality assessment results, the terminal device selects the SSB with the best quality, such as the one with the strongest signal strength, for synchronization. For example, if SSB#1 has the highest signal quality, the terminal device will select SSB#1 to complete time-frequency synchronization with the first cell.

[0102] (7) A first cell list, which may include cell identifiers of one or more cells, wherein the first cell list includes second cells. A cell identifier is a unique identifier assigned to a cell in a communication system to distinguish different cells. There may be a one-to-one correspondence between a cell and its cell identifier, with one cell corresponding to one cell identifier and different cells corresponding to different cell identifiers.

[0103] In some embodiments, the coverage areas of the cells included in the first cell list overlap with the coverage area of ​​the first cell. For example, the coverage areas of some cells included in the first cell list overlap with the coverage area of ​​the first cell; or, the coverage areas of all cells included in the first cell list overlap with the coverage area of ​​the first cell.

[0104] In some embodiments, the cells included in the first cell list can be dynamically adjusted based on factors such as cell coverage, network load, signal strength and quality, and cell fault and maintenance status. For example, the first network device can retain cells whose coverage overlaps with that of the first cell in the first cell list based on changes in the coverage of the first cell, thereby ensuring that the terminal device can connect to other cells in the first cell list through the first cell. For example, the first network device can dynamically adjust the selection of cells in the first cell list based on the number of users, traffic, and resource usage in different cells to achieve load balancing and improve overall network performance. For example, the first network device monitors the signal strength and quality of each cell in real time, prioritizing cells with high signal strength and good quality in the first cell list, thereby ensuring that the terminal device can connect to the optimal cell. For example, the first network device can automatically remove faulty or under-maintenance cells from the first cell list based on the fault detection and maintenance status of each cell to avoid interference with the acquisition of system configuration information.

[0105] For example, the first configuration information is used to indicate that the cell identifiers corresponding to cell 0, cell 1, cell 2 and cell 3 included in the first cell list are the first cell identifier, the second cell identifier, the third cell identifier and the fourth cell identifier, respectively; or, the first configuration information is used to indicate that the first cell list includes the first cell identifier, the second cell identifier, the third cell identifier and the fourth cell identifier.

[0106] (8) Mapping relationship between the index of the first reference signal and the cell identifier of the cell in the first cell list: It can be understood that there is a one-to-one correspondence between the index of the first reference signal (such as the SSB index) and the cell identifier. That is, one SSB index corresponds to one cell identifier, and different SSB indices correspond to different cell identifiers.

[0107] For example, the first configuration information is used to indicate that SSB#0 corresponds to the first cell identifier, SSB#1 corresponds to the second cell identifier, SSB#2 corresponds to the third cell identifier, and SSB#3 corresponds to the fourth cell identifier.

[0108] In some embodiments, the first network device may send one or more first configuration information messages to the terminal device; in other words, the first configuration information may include one or more configuration information messages. For example, the first network device may send one first configuration information message to the terminal device, which may be used to indicate resource configuration information of the first time-frequency resource, such as the time-domain position and frequency-domain position of the first time-frequency resource, and the index of the first reference signal. For example, the first network device may send two first configuration information messages (first configuration information 1 and first configuration information 2) to the terminal device, wherein first configuration information 1 may be used to indicate the resource configuration information of the aforementioned first time-frequency resource, such as the time-domain position and frequency-domain position of the first time-frequency resource. First configuration information 2 may be used to indicate the index of the first reference signal. This application does not limit the number of first configuration information messages sent by the first network device.

[0109] The second configuration information is described below.

[0110] In some embodiments, the second configuration information is used to determine at least one of the following: the cell identifier of the second cell, the time-domain location of the second time-frequency resource, the frequency-domain location of the second time-frequency resource, the identifier of the BWP where the second time-frequency resource is located, the frequency-domain location of the BWP where the second time-frequency resource is located, and the period corresponding to the second time-frequency resource. In some embodiments, the cell identifier of the second cell refers to a displacement identifier used to identify the second cell.

[0111] For example, the first configuration information is used to indicate the cell identifier of the second cell. For example, the second configuration information is used to indicate the time-domain location and frequency-domain location of the second time-frequency resource, that is, the second configuration information is used to indicate the time-frequency location of the second time-frequency resource, at which the terminal device can send request information or send a random access channel or signal. In some embodiments, the period corresponding to the second time-frequency resource refers to the repetition period of the second time-frequency resource in the time domain, that is, the time interval of the resource transmission, which can be in milliseconds. For example, the second configuration information can be used to indicate the period corresponding to the second time-frequency resource, so the terminal device can send request information or a random access channel or signal at an appropriate time-frequency location according to the period of the second time-frequency resource. For example, the time-domain location information of the second time-frequency resource includes at least one of the following: the offset value between the time-domain start position of the second time-frequency resource and the start position of the period corresponding to the second time-frequency resource, the time-domain start position of the second time-frequency resource, and the number of time-domain units included in the second time-frequency resource (e.g., the number of symbols included in the second time-frequency resource).

[0112] For example, the frequency domain location information of the second time-frequency resource includes at least one of the following: the frequency domain starting position of the second time-frequency resource, and the number of frequency domain units included in the second time-frequency resource (e.g., the number of resource blocks included in the second time-frequency resource).

[0113] In some embodiments, the second configuration information is used to determine at least one of the following: the cell identifier of each cell in the first cell list, the time-domain location and / or frequency-domain location of the time-frequency resource corresponding to each cell in the first cell list, the identifier and / or frequency-domain location of the BWP where the time-frequency resource corresponding to each cell in the first cell list is located, and the period corresponding to the time-frequency resource corresponding to each cell in the first cell list, wherein the first cell list includes second cells. In some embodiments, the second configuration information is used to determine the time-frequency resource corresponding to each cell in the first cell list.

[0114] For example, the first cell list includes at least one cell, and the second configuration information is used to indicate the cell identifier of each cell. For example, the first cell corresponds to the second time-frequency resource 0, and the second cell corresponds to the second time-frequency resource 1. The second configuration information is used to indicate the time-domain location and / or frequency-domain location and / or the identifier of the BWP in which the second time-frequency resource 0 of the first cell is located, and / or the corresponding period. The second configuration information is used to indicate the time-domain location and / or frequency-domain location and / or the identifier of the BWP in which the second time-frequency resource 1 of the second cell is located, and / or the corresponding period. Please refer to the relevant content above for details.

[0115] In some embodiments, the first network device may send one or more pieces of second configuration information to the terminal device; that is, the second configuration information may include one or more pieces of configuration information. For example, the first network device may send one piece of second configuration information to the terminal device, which may be used to indicate resource configuration information of the second time-frequency resource, such as the time-domain location and frequency-domain location of the second time-frequency resource, and the cell identifier of each cell in the first cell list. For example, the first network device may send two pieces of first configuration information (first configuration information 1 and first configuration information 2) to the terminal device, wherein first configuration information 1 may be used to indicate the resource configuration information of the aforementioned second time-frequency resource, such as the time-domain location and frequency-domain location of the second time-frequency resource. First configuration information 2 may be used to indicate the cell identifier of each cell in the first cell list. This application does not limit the number of pieces of second configuration information sent by the first network device.

[0116] In some embodiments, the first configuration information and the second configuration information are carried on the same channel. Exemplarily, the first configuration information and the second configuration information are transmitted through the same PDSCH. In some embodiments, the first configuration information and the second configuration information are carried on different channels. Exemplarily, the first configuration information and the second configuration information are transmitted through different PDSCHs.

[0117] The following describes the system configuration information for the second community.

[0118] In some embodiments, the system configuration information of the second cell is used to determine at least one of the following: (1) the frequency point of the second cell, (2) the cell identifier of the second cell, (3) the MIB of the second cell, (4) the SIB of the second cell, (5) the random access resource configuration of the second cell, (6) the downlink control resource configuration of the second cell, (7) the uplink control resource configuration of the second cell, and (8) the index of the second reference signal, wherein the second reference signal includes the synchronization channel or signal of the second cell, or the second reference signal is used by the terminal device to complete time and frequency synchronization with the second cell.

[0119] (1) Frequency of the second cell: The frequency of the second cell refers to the frequency range or specific frequency used by the second cell. Different cells may have different frequencies to avoid interference. For example, the frequency of the second cell includes the frequency of the synchronization signal of the second cell, such as the ARFCN (Absolute Radio Frequency Channel Number) value of the synchronization signal.

[0120] (2) Cell Identifier of the Second Cell: The cell identifier is a unique identification code assigned to each cell in a wireless communication network to distinguish different cells. Terminal devices can identify the second cell based on the cell identifier to avoid confusion.

[0121] (3) Second cell Master Information Block (MIB): This may include basic system configuration information of the second cell, such as the system frame number. After decoding the MIB, the terminal device can obtain the necessary parameters to perform the initial access procedure.

[0122] (4) System Information Block (SIB) of the Second Cell: This can include more detailed system configuration information, including the bandwidth configuration, resource configuration, access policy, neighbor cell information, etc., of the second cell. SIBs can be SIB1, SIB2, etc., with different types of SIBs carrying different information. For example, the terminal device can obtain the resource configuration of PRACH RO during random access based on the received system message SIB1 from the second cell. The terminal device can understand the operating status, random access restrictions, and available resources of the second network device based on the information in the SIB, helping it to better perform access and data transmission.

[0123] (5) Random access configuration of the second cell: This guides the terminal device on how to initiate an access request to the second network device in the network to prevent conflicts. It may include random access parameter settings, such as the selection of the access channel, random access preamble, conflict resolution strategy, access time slot configuration, maximum retransmission count, and retransmission interval. During access, the terminal device can select the correct access method based on the random access configuration to improve the success rate of random access and reduce latency.

[0124] (6) Downlink control resource configuration of the second cell: This configuration indicates the resources for downlink control signal transmission, including the configuration of the Physical Downlink Control Channel (PDCCH). This resource configuration may include transmission parameters of the downlink control channel, such as modulation format, coding scheme, scheduling of control information, and time-domain and frequency-domain resource allocation of the PDCCH. The downlink control resource configuration instructs terminal devices on how to receive downlink data and other control information, thereby ensuring that the network can effectively manage the communication process of the terminal devices.

[0125] (7) Uplink control resources of the second cell: Resources used to indicate the transmission of uplink control signals, including the configuration of the Physical Uplink Control Channel (PUCCH). This resource configuration may include PUCCH frequency allocation, time slot arrangement, and modulation format, etc. The uplink control resource configuration is used to instruct terminal devices how to send uplink data, thereby ensuring that the network can effectively receive terminal device status reports, feedback information, and other necessary uplink control signals for accurate resource scheduling, load balancing, and fault recovery.

[0126] (8) Second Reference Signal: The synchronization channel or signal of the second cell refers to a specific communication channel or signal in a wireless communication system used to assist the terminal device in time-domain and frequency-domain synchronization with the second network device. For example, the synchronization signal may include a primary synchronization signal and a secondary synchronization signal. The PSS can provide time-domain synchronization information; after detecting the PSS, the terminal device can obtain the time reference point of the second network device, thereby performing clock synchronization. The PSS and SSS can also provide frequency-domain synchronization information. By decoding the PSS and SSS, the terminal device can determine the frequency offset of the second network device and make corresponding corrections.

[0127] For example, the index of the second reference signal can be the SSB index. It is understood that there is a one-to-one correspondence between the SSB and its index, that is, one SSB corresponds to one index, and different SSBs correspond to different indices.

[0128] In some embodiments, the system configuration information of the second cell is further used to determine the synchronization signal of the second cell. For example, the system configuration information of the second cell is further used to determine at least one of the following: subcarrier spacing, period, and time-domain location of the synchronization signal of the second cell.

[0129] The following examples illustrate specific implementation methods for terminal devices accessing a second cell, using two states (including off and on) and four specific schemes. The scope of protection of this application is not limited to these examples.

[0130] The second community is in a closed state, corresponding to Scheme 1 and Scheme 2 below.

[0131] In some embodiments, the second cell has two states: a closed state and a non-closed state. In some embodiments, when the second cell is in the closed state, the downlink of the second cell is closed, while the uplink of the second cell remains open. The second network device does not send a synchronization signal for the second cell, which is a reference signal used for time-frequency synchronization with the second cell. It is understood that since the second network device does not send a synchronization signal, the terminal device cannot perceive the existence and cell identifier of the second cell. At this time, the terminal device can determine the cell identifier of the second cell according to the indication of the first configuration information. See step 1 in Scheme 1 and Scheme 2 below.

[0132] Option 1

[0133] As shown in Figure 5, step 1: The first network device sends first configuration information to the terminal device in the first cell. The first configuration information is used to determine the mapping relationship between the index of the first reference signal and the cell identifier of the cell in the first cell list. Accordingly, the terminal device receives the first configuration information sent by the first network device.

[0134] In some embodiments, the first configuration information is used to determine the mapping relationship between the index of the first reference signal and the cell identifier of the cell in the first cell list. The terminal device determines the cell indicated by the cell identifier corresponding to the index of the first reference signal that satisfies the first condition as the second cell based on the received first reference signal of the first cell and the above mapping relationship.

[0135] The first condition refers to the criterion for selecting a signal from multiple reference signals to assist in determining the second cell. In some embodiments, the first reference signal transmitted by the first cell may include multiple synchronization signals, and the first condition may include the signal with the best quality among the multiple synchronization signals. The signal quality may be determined based on at least one of the following indicators: signal strength, signal-to-noise ratio, bit error rate, and delay. This application does not limit this.

[0136] For example, the first reference signal may include transmitting SSB#0, SSB#1, SSB#2, and SSB#3. First configuration information is used to indicate that SSB#0 corresponds to a first cell identifier, SSB#1 corresponds to a second cell identifier, SSB#2 corresponds to a third cell identifier, and SSB#3 corresponds to a fourth cell identifier. The terminal device detects the signal quality of each of SSB#0, SSB#1, SSB#2, and SSB#3 respectively. Assuming that SSB#3 is determined to have the best signal quality, based on the above mapping relationship, the terminal device determines the identifier of the second cell as the identifier of the fourth cell.

[0137] Step 2: The first network device sends second configuration information to the terminal devices in the first cell. The second configuration information is used to obtain the system configuration information of the second cell. Correspondingly, the terminal devices receive the second configuration information sent by the first network device.

[0138] In some embodiments, the second configuration information is used to determine the resource configuration information of the second time-frequency resource. In some embodiments, the resource configuration information of the second time-frequency resource may be used to indicate parameters such as the frequency range, time period, modulation method, coding method, and power level of the second time-frequency resource, in order to optimize network performance and ensure that the terminal device can send uplink data on the second time-frequency resource.

[0139] In some embodiments, the second configuration information is used to indicate the time-frequency resources corresponding to each cell in the first cell list. For example, the second configuration information is used to indicate the time-domain location and / or frequency-domain location of the time-frequency resources corresponding to each cell in the first cell list and / or the identifier and / or frequency-domain location of the BWP where the time-frequency resources corresponding to each cell in the first cell list are located. The first cell list includes second cells, such as the aforementioned fourth cell identifier. The terminal device determines the time-frequency resources corresponding to the fourth cell identifier as the second time-frequency resources based on the second configuration information, and determines the time-domain location and / or frequency-domain location and / or the identifier of the BWP for the second time-frequency resources.

[0140] In some embodiments, the second time-frequency resource is used by the terminal device to send a request message to the network device in the second cell for requesting system configuration information of the second cell, as shown in step 3 below.

[0141] Step 3: The terminal device sends a request message to the second network device, requesting system configuration information for the second cell. Correspondingly, the second network device receives the request message from the terminal device.

[0142] In some embodiments, the terminal device sends a request message to the second network device on the second time-frequency resource. In some embodiments, the request message may be an uplink wake-up signal. For example, the terminal device sends an uplink wake-up signal on the second time-frequency resource, which is used to request the second network device to send system configuration information of the second cell.

[0143] In some embodiments, the terminal device sends an uplink channel to the second network device through a second time-frequency resource. The uplink channel carries request information for requesting the transmission of system configuration information of the second cell.

[0144] In some embodiments, the terminal device sends an uplink reference signal to the second network device via a second time-frequency resource. This uplink reference signal is used to request the transmission of system configuration information of the second cell. In other words, the uplink reference signal is used to implicitly determine the request information.

[0145] In some embodiments, after sending a request message, the synchronization channel or signal of the second cell is detected based on the cell identifier of the second cell. In some embodiments, the terminal device performs detection on the corresponding frequency range and time resources based on the cell identifier of the second cell to find the synchronization signal emitted by that cell. In some embodiments, after sending a request message, the synchronization channel or signal of the second cell is detected based on the cell identifier of the second cell, and time-frequency synchronization with the second cell is completed based on the synchronization channel or signal of the second cell. In some embodiments, the terminal device demodulates the detected synchronization signal to extract relevant information. The relevant information may include cell identifier, time-domain and frequency-domain configuration, and system information, etc. The terminal device extracts time information from the demodulated synchronization signal and adjusts its own clock system to keep it in time-domain consistency with the second cell. The terminal device adjusts its receiving frequency based on the frequency information of the received synchronization signal to match the transmission frequency of the second cell.

[0146] In some embodiments, the second configuration information is used to determine the resource configuration information of the third time-frequency resource. In some embodiments, the resource configuration information of the third time-frequency resource can be used to indicate parameters such as the frequency range, time period, modulation scheme, coding scheme, and power level of the third time-frequency resource, to optimize network performance and ensure that the terminal device can listen to the system configuration information of the second cell using the third time-frequency resource. In some embodiments, the second configuration information is used to indicate at least one of the following: the time-domain location of the third time-frequency resource, the frequency-domain location of the third time-frequency resource, the identifier of the BWP where the third time-frequency resource is located, the frequency-domain location of the BWP where the third time-frequency resource is located, and the period corresponding to the third time-frequency resource. For example, the time-domain location information of the third time-frequency resource includes at least one of the following: the offset between the time-domain start position of the third time-frequency resource and the start position of the period corresponding to the third time-frequency resource, the time-domain start position of the third time-frequency resource, and the number of time-domain units included in the third time-frequency resource (e.g., the number of symbols included in the third time-frequency resource). For example, the frequency domain location information of the third time-frequency resource includes at least one of the following: the frequency domain starting position of the third time-frequency resource, and the number of frequency domain units included in the third time-frequency resource (e.g., the number of resource blocks included in the third time-frequency resource).

[0147] In some embodiments, the third time-frequency resource is used by the terminal device to listen for system configuration information of the second cell sent by the network device in the second cell. In some embodiments, after sending a request message, the terminal device listens for system configuration information of the second cell sent by the network device in the second cell on the third time-frequency resource.

[0148] In some embodiments, after sending a request message and completing time-frequency synchronization with the second cell, the terminal device listens for system configuration information of the second cell sent by network devices in the second cell on a third time-frequency resource. This method allows the terminal device to promptly listen to and parse the system configuration information of the second cell after completing time-frequency synchronization, thereby quickly obtaining important parameters required for connection establishment and reducing connection latency.

[0149] In some embodiments, after sending a request message, the system configuration information of the second cell sent by the network device in the second cell is monitored on a third time-frequency resource based on time-frequency synchronization with the first cell. In some embodiments, this method is suitable for small cell scenarios where the first and second network devices are close to each other. Therefore, the timing advance (TA) between the second cell and the terminal device is not significantly different from the TA between the first cell and the terminal device. TA is a parameter used to measure the relative distance of the wireless link between the terminal and the cell. The greater the distance, the longer the signal propagation time, so the terminal needs to adjust its signal transmission timing to ensure that the signal arriving at the base station can be received within the appropriate time window. When the TA between the first cell and the terminal device is not significantly different from the TA between the second cell and the terminal device, the terminal device can utilize similar time adjustment mechanisms when performing time-frequency synchronization and signal reception, reducing processing complexity.

[0150] Step 4: The second network device sends the system configuration information of the second cell to the terminal device. Correspondingly, the terminal device receives the system configuration information of the second cell sent by the second network device.

[0151] In some embodiments, the second network device sends system configuration information of the second cell to the terminal device on a third time-frequency resource. Exemplarily, the third time-frequency resource is used to transmit at least one of the following: a shared channel carrying SIBs, a control channel carrying control information for scheduling SIB transmission, and a control channel carrying control information indicating whether to receive SIBs. Exemplarily, the third time-frequency resource can be used to transmit shared information carrying SIBs, i.e., the third time-frequency resource is used to transmit PDSCH, which includes SIBs. Exemplarily, the third time-frequency resource can be used to transmit a control channel carrying control information for scheduling SIB transmission, i.e., the second network device transmits PDCCH on the third time-frequency resource, which instructs the terminal device to receive PDSCH on a specific time-frequency resource. The terminal device can listen to the PDCCH to receive PDSCH on the specified time-frequency resource, and the PDSCH is used to transmit SIBs. For example, the third time-frequency resource can be used to transmit a control channel carrying control information indicating whether to receive SIB transmissions. For instance, the second network device transmits a PDCCH on the third time-frequency resource. When the PDCCH is used to instruct the terminal device to receive SIB transmissions, the terminal device can listen to the PDSCH on the designated time-frequency resource. Alternatively, when the PDCCH is used to instruct the terminal device not to receive SIB transmissions, in this case, the terminal device does not need to listen to the PDSCH.

[0152] Step 5: The terminal device sends a random access channel or signal to the second network device. Correspondingly, the second network device receives the random access channel or signal sent by the terminal device.

[0153] In some embodiments, when a terminal device has a data transmission requirement, it sends a random access channel or signal to a second network device to access the second cell.

[0154] In some embodiments, the system configuration information of the second cell is used to determine the random access resource configuration of the second cell. The terminal device determines the random access resources based on the random access resource configuration of the second cell, and sends a random access channel or signal to the second cell through the random access resources.

[0155] For example, the system configuration information of the second cell is used to determine the PRACH resource configuration of the second cell. The terminal device determines the PRACH resource based on the PRACH resource configuration of the second cell and sends the PRACH on the determined PRACH resource.

[0156] Step 6: The second network device sends a random access response to the terminal device. Accordingly, the terminal device accepts the random access response sent by the second network device.

[0157] In some embodiments, when a terminal device establishes a connection with the network by sending a random access procedure (such as sending a random access preamble), the second network device sends a random access response (RAR) to the terminal device to ensure that the terminal device can receive the network's access confirmation and continue with subsequent communication steps.

[0158] The system configuration information of the second cell is used to indicate the downlink control resource configuration of the second cell. The terminal device determines the downlink control resources based on the downlink control resource configuration of the second cell and listens for the random access response (RAR) sent by the second network device through the downlink control resources. For example, the system configuration information of the second cell is used to determine the PDCCH resource configuration of the second cell. The terminal device determines the PDCCH resources according to the PDCCH resource configuration of the second cell and listens for the RAR (Random Access Response) on the determined PDCCH resources.

[0159] Option 2

[0160] As shown in Figure 6, step 1: The first network device sends first configuration information to the terminal device in the first cell. The first configuration information is used to determine the mapping relationship between the index of the first reference signal and the cell identifier of the cell in the first cell list. Accordingly, the terminal device receives the first configuration information sent by the first network device.

[0161] In some embodiments, the first configuration information is used to determine the mapping relationship between the index of the first reference signal and the cell identifier of the cell in the first cell list. The terminal device, based on the received first reference signal of the first cell and the aforementioned mapping relationship, determines the cell indicated by the cell identifier corresponding to the index of the first reference signal that satisfies the first condition as the second cell. Please refer to the above for details.

[0162] Step 2: The first network device sends second configuration information to the terminal devices in the first cell. The second configuration information is used to obtain the system configuration information of the second cell. Correspondingly, the terminal devices receive the second configuration information sent by the first network device.

[0163] In some embodiments, the second configuration information includes system configuration information of the second cell. In some embodiments, the system configuration information of the second cell includes the random access configuration of the second cell.

[0164] In some embodiments, the second configuration information is used to determine the resource configuration information of the second time-frequency resource. In some embodiments, the second time-frequency resource is used by the terminal device to send a random access channel or signal to the second cell.

[0165] Step 3: The terminal device sends a random access channel or signal to the second network device. Correspondingly, the second network device receives the random access channel or signal sent by the terminal device.

[0166] In some embodiments, the terminal device sends a random access channel or signal to the second network device on the second time-frequency resource. Exemplarily, the terminal device sends a PRACH on the second time-frequency resource, which is used to request the terminal device to initiate random access to the second cell. Exemplarily, the second time-frequency resource is used to transmit message A in a two-step random access process, which is used by the terminal device to initiate random access to the second cell. Message A includes PRACH and PUSCH. Exemplarily, the second time-frequency resource is used to transmit the Physical Uplink Shared Channel (PUSCH), which is used by the terminal device to initiate RACH-less random access to the second cell.

[0167] In some embodiments, the second configuration information is used to determine the resource configuration information of the third time-frequency resource. In some embodiments, the second configuration information is used to indicate at least one of the following: the time-domain location of the third time-frequency resource, the frequency-domain location of the third time-frequency resource, the identifier of the BWP where the third time-frequency resource is located, the frequency-domain location of the BWP where the third time-frequency resource is located, and the period corresponding to the third time-frequency resource. In some embodiments, the third time-frequency resource is used by the terminal device to listen to the random access response sent by the second network device of the second cell.

[0168] In some embodiments, after transmitting a random access channel or signal, the synchronization channel or signal of the second cell is detected based on the cell identifier of the second cell. In some embodiments, after transmitting a random access channel or signal, the synchronization channel or signal of the second cell is detected based on the cell identifier of the second cell, and time-frequency synchronization with the second cell is completed based on the synchronization channel or signal of the second cell.

[0169] In some embodiments, after transmitting a random access channel or signal, the terminal device listens for random access responses sent by network devices in the second cell on a third time-frequency resource. This method allows the terminal device to listen to the third time-frequency resource promptly and accurately after time-frequency synchronization with the second cell, in order to receive random access responses sent by the second network device.

[0170] In some embodiments, after transmitting a random access channel or signal and completing time-frequency synchronization with the second cell, the random access response sent by the network device in the second cell is monitored on the third time-frequency resource; or, after transmitting a random access channel or signal, the random access response sent by the network device in the second cell is monitored on the third time-frequency resource based on time-frequency synchronization with the first cell. Similarly, this method is applicable to small cell scenarios, where the time adjustment mechanism (TA) between the first cell and the terminal device is not significantly different from that between the second cell and the terminal device. This allows the terminal device to utilize similar time adjustment mechanisms during time-frequency synchronization and signal reception, reducing processing complexity.

[0171] Step 4: The second network device sends a random access response to the terminal device. Accordingly, the terminal device accepts the random access response sent by the second network device.

[0172] In some embodiments, the second network device sends a random access response (RAR) to the terminal device on a third time-frequency resource. Exemplarily, the third time-frequency resource is used to transmit at least one of the following: a shared channel carrying the RAR, and a control channel carrying control information scheduling the transmission of the RAR. Exemplarily, the third time-frequency resource can be used to transmit shared information carrying the RAR, i.e., the third time-frequency resource is used to transmit a PDSCH, which includes the RAR. Exemplarily, the third time-frequency resource can be used to transmit a control channel carrying control information scheduling the transmission of the RAR, i.e., the second network device transmits a PDCCH on the third time-frequency resource, which instructs the terminal device to receive the PDSCH on a specific time-frequency resource. The terminal device can receive the PDSCH on the specified time-frequency resource by listening to the PDCCH, and the PDSCH is used to transmit the RAR.

[0173] The second community is in an open state, corresponding to Scheme 3 and Scheme 4 below.

[0174] In some embodiments, when the second cell is in a non-shutdown state, that is, in a normal operating state, the normal operating state can include a basic mode state and an active mode state. In the basic mode state, the second cell can periodically send discovery signals, which may include synchronization signals. When the second cell is in the active mode state, the second cell has normal communication functions.

[0175] Understandably, since the second network device can send a synchronization signal, the terminal device can determine the cell identifier of the second cell based on the received synchronization signal. See step 1 in schemes 3 and 4 below.

[0176] Option 3

[0177] As shown in Figure 7, step 1: The first network device sends second configuration information to the terminal device in the first cell. The second configuration information is used to obtain the system configuration information of the second cell. Correspondingly, the terminal device receives the second configuration information sent by the first network device.

[0178] In some embodiments, the second configuration information is used to determine the cell identifier of each cell in the first cell list, and the terminal device detects the synchronization channel or signal of other cells besides the first cell; based on the detected synchronization channel or signal, the cell indicated by the corresponding cell identifier in the first cell list is determined to be the second cell.

[0179] In some embodiments, the terminal device receives synchronization signals from multiple cells and determines the cell corresponding to the synchronization signal with the best signal quality among the multiple synchronization signals as the second cell.

[0180] For example, the first cell list includes a first cell identifier, a second cell identifier, a third cell identifier, and a fourth cell identifier. The terminal device detects the SSBs corresponding to the third cell identifier and the fourth cell identifier. Among them, the SSB with the best signal quality is the SSB corresponding to the fourth cell identifier. Then, the terminal device determines that the identifier of the second cell is the fourth cell identifier.

[0181] In some embodiments, the second configuration information is used to determine the resource configuration information of the second time-frequency resource. For example, the second configuration information is used to indicate the time-domain location and / or frequency-domain location of the time-frequency resource corresponding to each cell in the first cell list and / or the identifier and / or frequency-domain location of the BWP where the time-frequency resource corresponding to each cell in the first cell list is located.

[0182] In some embodiments, the second time-frequency resource is used by the terminal device to send a request message to the network device in the second cell for requesting system configuration information of the second cell, as shown in step 3 below.

[0183] Step 2: The terminal device sends a request message to the second network device, requesting system configuration information for the second cell. Correspondingly, the second network device receives the request message from the terminal device.

[0184] In some embodiments, the terminal device sends a request message to the second network device on the second time-frequency resource.

[0185] In some embodiments, the second configuration information is used to determine the resource configuration information of the third time-frequency resource. In some embodiments, the third time-frequency resource is used by the terminal device to listen to the system configuration information of the second cell sent by the network device in the second cell.

[0186] Step 3: The second network device sends the system configuration information of the second cell to the terminal device. Correspondingly, the terminal device receives the system configuration information of the second cell sent by the second network device.

[0187] In some embodiments, the second network device sends system configuration information of the second cell to the terminal device on a third time-frequency resource.

[0188] In some embodiments, the system configuration information of the second cell is used to determine the random access resource configuration of the second cell. The terminal device determines the random access resources based on the random access resource configuration of the second cell, and sends a random access channel or signal to the second cell through the random access resources.

[0189] Step 4: The terminal device sends a random access channel or signal to the second network device. Correspondingly, the second network device receives the random access channel or signal sent by the terminal device.

[0190] In some embodiments, the system configuration information of the second cell is used to determine the downlink control resource configuration of the second cell. The terminal device determines the downlink control resources based on the downlink control resource configuration of the second cell and listens for the random access response sent by the second network device through the downlink control resources.

[0191] Step 5: The second network device sends a random access response to the terminal device. Accordingly, the terminal device accepts the random access response sent by the second network device.

[0192] The system configuration information of the second cell is used to indicate the downlink control resource configuration of the second cell. The terminal device determines the downlink control resources based on the downlink control resource configuration of the second cell and listens for the random access response sent by the second network device through the downlink control resources.

[0193] For details on Option 3, please refer to Option 1 above.

[0194] Option 4

[0195] As shown in Figure 8, step 1: The first network device sends second configuration information to the terminal device in the first cell. The second configuration information is used to obtain the system configuration information of the second cell. Correspondingly, the terminal device receives the second configuration information sent by the first network device.

[0196] In some embodiments, the second configuration information is used to determine the cell identifier of each cell in the first cell list, and the terminal device detects the synchronization channel or signal of other cells besides the first cell; based on the detected synchronization channel or signal, the cell indicated by the corresponding cell identifier in the first cell list is determined to be the second cell.

[0197] In some embodiments, the second configuration information includes the system configuration information of the second cell.

[0198] In some embodiments, the system configuration information of the second cell includes the random access configuration of the second cell.

[0199] In some embodiments, the second configuration information is used to determine the resource configuration information of the second time-frequency resource. In some embodiments, the second time-frequency resource is used by the terminal device to send a random access channel or signal to the second cell.

[0200] Step 2: The terminal device sends a random access channel or signal to the second network device. Correspondingly, the second network device receives the random access channel or signal sent by the terminal device.

[0201] In some embodiments, the terminal device sends a random access channel or signal to the second network device on the second time-frequency resource.

[0202] In some embodiments, the second configuration information is used to determine the resource configuration information of the third time-frequency resource. In some embodiments, the third time-frequency resource is used by the terminal device to listen to the random access response sent by the second network device in the second cell.

[0203] Step 3: The second network device sends a random access response to the terminal device. Correspondingly, the terminal device accepts the random access response sent by the second network device.

[0204] In some embodiments, the second network device sends a random access response to the terminal device on a third time-frequency resource.

[0205] For details on Option 4, please refer to Option 2 above.

[0206] For schemes 1 to 4 above, before step 1, the method may further include: the second network device sending second configuration information to the first network device. Correspondingly, the first network device receives the second configuration information. For example, the second network device sends some or all of the information in the second configuration information to the first network device. Correspondingly, the first network device receives some or all of the information in the second configuration information and sends the second configuration information to the terminal device.

[0207] For schemes 1 to 4 above, the following steps may also be included: Step A: When the terminal device is in a connected state and the system configuration information of the first cell has changed, the first network device sends the updated system configuration information of the first cell to the network device in the second cell. The updated system configuration information of the first cell is then sent to the terminal device by the network device in the second cell. Accordingly, the second network device receives the updated system configuration information of the first cell sent by the first network device. Step B: After receiving the updated system configuration information of the first cell sent by the first network device, the second network device sends the updated system configuration information of the first cell to the terminal device. Accordingly, the terminal device receives the updated system configuration information of the first cell sent by the second network device.

[0208] In some embodiments, when the network environment of the first cell changes, the system configuration information of the first cell may change, which may refer to a change in the resource configuration information of the first time-frequency resource, such as a change in the time domain location and frequency domain location of the first time-frequency resource.

[0209] In some embodiments, when a terminal device accesses a second cell, a first network device sends updated system configuration information of the first cell to a network device in the second cell. The network device in the second cell can then forward this updated information to the terminal device.

[0210] For schemes 1 to 4 above, the following steps may also be included: When the terminal device is in a connected state and the system configuration information of the first cell has changed, the first network device sends the updated system configuration information of the first cell to the terminal device through the time-frequency resources of the first cell. Accordingly, the terminal device receives the updated system configuration information of the first cell sent by the first network device.

[0211] In some embodiments, when a terminal device accesses a first cell, the first network device can directly send the updated system configuration information of the first cell to the terminal device.

[0212] The above method allows terminal devices to receive updated system configuration information directly or indirectly when the system configuration information of the first cell changes, so as to understand the latest system configuration of the first cell in a timely manner and facilitate the effective use of network resources.

[0213] For schemes 1 to 4 above, the following steps may also be included: the second network device sends third configuration information to the first network device, the third configuration information being used to determine that the second configuration information is invalid; wherein, after obtaining the third configuration information, the first network device no longer provides the second configuration information to the terminal devices in the first cell. Correspondingly, the first network device receives the second configuration information sent by the second network device. For example, the third configuration information can be used to indicate that the second time-frequency resource is invalid, then the first network device no longer provides the second time-frequency resource to the terminal devices in the first cell, the terminal devices stop sending request information or random access channels or signals on the second time-frequency resource, and the second network device no longer needs to listen to the second time-frequency resource. For example, the third configuration information can be used to indicate that the third time-frequency resource is invalid, then the first network device no longer provides the third time-frequency resource to the terminal devices in the first cell. The second network device stops sending system configuration information or random access responses for the second cell on the third time-frequency resource, and the terminal devices no longer need to listen to the third time-frequency resource. With the above method, when the network environment of the second cell changes, the third configuration information can promptly report the invalidity of the first configuration information to the first network device.

[0214] It should be understood that in the various embodiments of this application, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0215] It should be noted that, without conflict, the various embodiments and / or technical features described in this application can be arbitrarily combined with each other, and the resulting technical solutions should also fall within the protection scope of this application.

[0216] In some embodiments, when the terminal device is in an idle state or a disconnected state, the terminal device maintains time-frequency synchronization with the first cell; and / or, when the terminal device is in a connected state, the terminal device maintains time-frequency synchronization with the second cell.

[0217] In some embodiments, when the terminal device is in an idle or disconnected state, the terminal device only needs to camp on a cell. In this case, it can camp on the first cell and therefore needs to maintain time and frequency synchronization with the first cell in order to receive the paging messages of the first cell in a timely and accurate manner.

[0218] In some embodiments, when the terminal device is in a connected state, the terminal device has a data transmission requirement. At this time, it can access the second cell. Therefore, it is necessary to maintain time and frequency synchronization with the second cell to ensure communication transmission with the second cell.

[0219] In some embodiments, when the terminal device is in an idle or disconnected state, the terminal device does not need to maintain time-frequency synchronization with the second cell; when the terminal device is in a connected state, the terminal device does not need to maintain time-frequency synchronization with the first cell.

[0220] In some embodiments, when the terminal device is in an idle or disconnected state, the terminal device does not need to maintain time-frequency synchronization with the second cell, but only needs to maintain time-frequency synchronization with the first cell.

[0221] In some embodiments, when the terminal device is in a connected state, the terminal device does not need to maintain time and frequency synchronization with the first cell, but only needs to maintain time and frequency synchronization with the second cell.

[0222] The above method requires only that the terminal device maintain time and frequency synchronization with a cell, regardless of its state, making it simple to implement.

[0223] In some embodiments, when the terminal device is in an idle or disconnected state, the terminal device does not need to maintain time-frequency synchronization with the second cell; when the terminal device is in a connected state, the terminal device maintains time-frequency synchronization with the first cell.

[0224] In some embodiments, when the terminal device is in an idle or disconnected state, the terminal device does not need to maintain time-frequency synchronization with the second cell, but maintains time-frequency synchronization with the first cell.

[0225] In some embodiments, when the terminal device is in a connected state, the terminal device maintains time-frequency synchronization with the second cell and also maintains time-frequency synchronization with the first cell. When the terminal device only needs to camp on a specific cell, it can quickly switch to camp on the first cell to listen for paging messages from the first cell because it maintains time-frequency synchronization with the first cell.

[0226] The above method requires the terminal device to maintain time-frequency synchronization with the first cell regardless of its state. This approach can reduce latency during the process of the terminal device returning from a connected state to an idle or inactive state.

[0227] In some embodiments, when the terminal device is in an idle state or a disconnected state, the terminal device maintains time-frequency synchronization with the second cell; when the terminal device is in a connected state, the terminal device maintains time-frequency synchronization with the first cell.

[0228] In some embodiments, when the terminal device is in an idle or disconnected state, the terminal device maintains time-frequency synchronization with the first cell and also maintains time-frequency synchronization with the second cell. When the terminal device has data transmission requirements, it can quickly access the second cell due to the time-frequency synchronization with the second cell.

[0229] In some embodiments, when the terminal device is in a connected state, the terminal device maintains time-frequency synchronization with the second cell and also maintains time-frequency synchronization with the first cell. When the terminal device only needs to camp on a specific cell, it can quickly switch to camp on the first cell to listen for paging messages from the first cell because it maintains time-frequency synchronization with the first cell.

[0230] The above method requires the terminal device to maintain time-frequency synchronization with both cells regardless of its state. This approach reduces latency during the transition of the terminal device from an idle or inactive state to a connected state, or from a connected state back to an idle or inactive state.

[0231] The above embodiments only describe the technical solution provided by this application from the perspective of the interaction between at least two devices, namely the terminal device, the first network device, and the second network device. The steps performed by the terminal device described above can be implemented independently as a wireless communication method on the terminal device side. The steps performed by the first network device described above can be implemented independently as a wireless communication method on the first network device side. The steps performed by the second network device described above can be implemented independently as a wireless communication method on the second network device side.

[0232] The following are embodiments of the apparatus described in this application, which can be used to execute the embodiments of the method described in this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the method described in this application.

[0233] Please refer to Figure 9, which shows a block diagram of a wireless communication device according to an embodiment of this application. This device has the function of implementing the above-described wireless communication method; the function can be implemented in hardware or by hardware executing corresponding software. This device can be the terminal device described above, or it can be disposed within a terminal device. As shown in Figure 9, the device 900 may include a receiving module 910.

[0234] The receiving module 910 is used to receive first configuration information and / or second configuration information sent by the first network device. The first configuration information is used to listen to the paging message of the first cell, and the second configuration information is used to obtain the system configuration information of the second cell.

[0235] In some embodiments, the first configuration information is used to determine the resource configuration information of the first time-frequency resource.

[0236] In some embodiments, the first time-frequency resource is used by the terminal device to listen to paging messages in the first cell.

[0237] In some embodiments, the first configuration information is used to determine at least one of the following: the time domain location of the first time-frequency resource, the frequency domain location of the first time-frequency resource, the identifier of the BWP where the first time-frequency resource is located, the frequency domain location of the BWP where the first time-frequency resource is located, and the period corresponding to the first time-frequency resource.

[0238] In some embodiments, the first configuration information is used to determine at least one of the following: an index of a first reference signal, the first reference signal including a synchronization channel or signal of the first cell, or the first reference signal being used by the terminal device to complete time-frequency synchronization with the first cell; a cell identifier of each cell in the first cell list; a mapping relationship between the index of the first reference signal and the cell identifiers of the cells in the first cell list; wherein the first cell list includes the second cell.

[0239] In some embodiments, the second configuration information includes the system configuration information of the second cell.

[0240] In some embodiments, the second configuration information is used to determine the resource configuration information of the second time-frequency resource.

[0241] In some embodiments, the second time-frequency resource is used by the terminal device to send a request message to the network device in the second cell for requesting system configuration information of the second cell.

[0242] In some embodiments, the second time-frequency resource is used by the terminal device to send a random access channel or signal to a network device in the second cell.

[0243] In some embodiments, the second configuration information is used to determine at least one of the following: the cell identifier of the second cell, the time-domain location of the second time-frequency resource, the frequency-domain location of the second time-frequency resource, the identifier of the BWP where the second time-frequency resource is located, the frequency-domain location of the BWP where the second time-frequency resource is located, and the period corresponding to the second time-frequency resource.

[0244] In some embodiments, the second configuration information is used to determine at least one of the following: the cell identifier of each cell in the first cell list, the time-domain location and / or frequency-domain location of the time-frequency resource corresponding to each cell in the first cell list, the identifier and / or frequency-domain location of the BWP where the time-frequency resource corresponding to each cell in the first cell list is located, and the period corresponding to the time-frequency resource corresponding to each cell in the first cell list, wherein the first cell list includes the second cell.

[0245] In some embodiments, the second configuration information is used to determine the resource configuration information of the third time-frequency resource.

[0246] In some embodiments, the third time-frequency resource is used by the terminal device to listen to the system configuration information of the second cell sent by the network device in the second cell.

[0247] In some embodiments, the third time-frequency resource is used by the terminal device to listen for random access responses sent by network devices in the second cell.

[0248] In some embodiments, the device 900 further includes a processing module (not shown in FIG9).

[0249] The processing module is configured to, after sending the request message, detect the synchronization channel or signal of the second cell based on the cell identifier of the second cell; or, after sending the request message, detect the synchronization channel or signal of the second cell based on the cell identifier of the second cell, and complete time-frequency synchronization with the second cell based on the synchronization channel or signal of the second cell; or, after sending the request message, listen to the system configuration information of the second cell sent by the network device in the second cell on the third time-frequency resource; or, after sending the request message and completing time-frequency synchronization with the second cell, listen to the system configuration information of the second cell sent by the network device in the second cell on the third time-frequency resource; or, after sending the request message, listen to the system configuration information of the second cell sent by the network device in the second cell on the third time-frequency resource based on time-frequency synchronization with the first cell.

[0250] In some embodiments, the processing module is configured to, after sending the random access channel or signal, detect the synchronization channel or signal of the second cell based on the cell identifier of the second cell; or, after sending the random access channel or signal, detect the synchronization channel or signal of the second cell based on the cell identifier of the second cell, and complete time-frequency synchronization with the second cell based on the synchronization channel or signal of the second cell; or, after sending the random access channel or signal, listen to the random access response sent by the network device in the second cell on a third time-frequency resource; or, after sending the random access channel or signal and completing time-frequency synchronization with the second cell, listen to the random access response sent by the network device in the second cell on a third time-frequency resource; or, after sending the random access channel or signal, listen to the random access response sent by the network device in the second cell on a third time-frequency resource based on time-frequency synchronization with the first cell.

[0251] In some embodiments, the first configuration information is used to determine the mapping relationship between the index of the first reference signal and the cell identifier of the cell in the first cell list, and the processing module is used to determine the cell indicated by the cell identifier corresponding to the index of the first reference signal that satisfies the first condition as the second cell based on the first reference signal received from the first cell and the mapping relationship.

[0252] In some embodiments, the second configuration information is used to determine the cell identifier of each cell in the first cell list, and the processing module is used to detect the synchronization channel or signal of other cells besides the first cell; based on the detected synchronization channel or signal, the cell indicated by the corresponding cell identifier in the first cell list is determined to be the second cell.

[0253] In some embodiments, the system configuration information of the second cell is used to determine at least one of the following: the frequency point of the second cell, the cell identifier of the second cell, the main information block (MIB) of the second cell, the system information block (SIB) of the second cell, the random access resource configuration of the second cell, the downlink control resource configuration of the second cell, the uplink control resource configuration of the second cell, and the index of a second reference signal, wherein the second reference signal includes the synchronization channel or signal of the second cell, or the second reference signal is used by the terminal device to complete time and frequency synchronization with the second cell.

[0254] In some embodiments, the receiving module 910 is configured to listen for paging messages in the first cell according to the first configuration information when the terminal device is in an idle state or a disconnected state.

[0255] In some embodiments, the processing module is configured to determine whether to enter a connected state from an idle state or a disconnected state when the terminal device receives a paging message from the first cell and the paging message is used to page the terminal device; and / or, when the terminal device determines whether to enter the connected state from the idle state or the disconnected state, access the second cell according to the second configuration information.

[0256] In some embodiments, the receiving module 910 is configured to listen for paging messages of the first cell according to the first configuration information when the terminal device switches from a connected state to an idle state or a disconnected state.

[0257] In some embodiments, when the terminal device is in a connected state and the system configuration information of the first cell has changed, the receiving module 910 is used to receive the updated system configuration information of the first cell sent by the network device in the second cell through the time-frequency resources of the second cell; or, to receive the updated system configuration information of the first cell sent by the first network device through the time-frequency resources of the first cell.

[0258] In some embodiments, when the terminal device is in an idle state or a disconnected state, the terminal device maintains time-frequency synchronization with the first cell; and / or, when the terminal device is in a connected state, the terminal device maintains time-frequency synchronization with the second cell.

[0259] In some embodiments, when the terminal device is in an idle or disconnected state, the terminal device is not required to maintain time-frequency synchronization with the second cell; when the terminal device is in a connected state, the terminal device is not required to maintain time-frequency synchronization with the first cell; or, when the terminal device is in an idle or disconnected state, the terminal device is not required to maintain time-frequency synchronization with the second cell; when the terminal device is in a connected state, the terminal device maintains time-frequency synchronization with the first cell; or, when the terminal device is in an idle or disconnected state, the terminal device maintains time-frequency synchronization with the second cell; when the terminal device is in a connected state, the terminal device maintains time-frequency synchronization with the first cell.

[0260] In some embodiments, the first cell is the primary cell where the terminal device is stationed, and the second cell is the primary cell for transmission of the terminal device; or, the first cell is the primary cell where the terminal device is stationed, and the second cell is the primary cell for transmission of the terminal device; or, the first cell is a partial primary cell of the terminal device, and the second cell is the primary cell of the terminal device; or, the first cell is the primary cell of the terminal device, and the second cell is a partial primary cell of the terminal device.

[0261] In some embodiments, the first cell is a non-terrestrial network (NTN) cell and the second cell is a terrestrial network (TN) cell; or, the first cell is a TN cell and the second cell is an NTN cell; or, both the first cell and the second cell are TN cells; or, both the first cell and the second cell are NTN cells.

[0262] In some embodiments, the first cell is a 5G cell and the second cell is a 6G cell; or, the first cell is a 6G cell and the second cell is a 5G cell; or, both the first cell and the second cell are 6G cells; or, both the first cell and the second cell are 5G cells.

[0263] Please refer to Figure 10, which shows a block diagram of a wireless communication device according to another embodiment of this application. This device has the function of implementing the above-described wireless communication method; the function can be implemented in hardware or by hardware executing corresponding software. This device can be the first network device described above, or it can be disposed within the first network device. As shown in Figure 10, the device 1000 may include: a transmitting module 1010.

[0264] The sending module 1010 is used to send first configuration information and / or second configuration information to the terminal device in the first cell. The first configuration information is used to listen to the paging message of the first cell, and the second configuration information is used to obtain the system configuration information of the second cell.

[0265] In some embodiments, the first configuration information is used to determine the resource configuration information of the first time-frequency resource.

[0266] In some embodiments, the first time-frequency resource is used by the terminal device to listen to paging messages in the first cell.

[0267] In some embodiments, the first configuration information is used to determine at least one of the following: the time domain location of the first time-frequency resource, the frequency domain location of the first time-frequency resource, the identifier of the BWP where the first time-frequency resource is located, the frequency domain location of the BWP where the first time-frequency resource is located, and the period corresponding to the first time-frequency resource.

[0268] In some embodiments, the first configuration information is used to determine at least one of the following: an index of a first reference signal, the first reference signal including a synchronization channel or signal of the first cell, or the first reference signal being used by the terminal device to complete time-frequency synchronization with the first cell; a cell identifier of each cell in the first cell list; a mapping relationship between the index of the first reference signal and the cell identifiers of the cells in the first cell list; wherein the first cell list includes the second cell.

[0269] In some embodiments, the second configuration information includes the system configuration information of the second cell.

[0270] In some embodiments, the second configuration information is used to determine the resource configuration information of the second time-frequency resource.

[0271] In some embodiments, the second time-frequency resource is used by the terminal device to send a request message to the network device in the second cell for requesting system configuration information of the second cell.

[0272] In some embodiments, the second time-frequency resource is used by the terminal device to send a random access channel or signal to a network device in the second cell.

[0273] In some embodiments, the second configuration information is used to determine at least one of the following: the cell identifier of the second cell, the time-domain location of the second time-frequency resource, the frequency-domain location of the second time-frequency resource, the identifier of the BWP where the second time-frequency resource is located, the frequency-domain location of the BWP where the second time-frequency resource is located, and the period corresponding to the second time-frequency resource.

[0274] In some embodiments, the second configuration information is used to determine or indicate at least one of the following: the cell identifier of each cell in the first cell list, the time-domain location and / or frequency-domain location of the time-frequency resource corresponding to each cell in the first cell list, the identifier and / or frequency-domain location of the BWP where the time-frequency resource corresponding to each cell in the first cell list is located, and the period corresponding to the time-frequency resource corresponding to each cell in the first cell list, wherein the first cell list includes the second cell.

[0275] In some embodiments, the second configuration information is used to determine the resource configuration information of the third time-frequency resource.

[0276] In some embodiments, the third time-frequency resource is used by the terminal device to listen to the system configuration information of the second cell sent by the network device in the second cell.

[0277] In some embodiments, the third time-frequency resource is used by the terminal device to listen for random access responses sent by the second network device.

[0278] In some embodiments, the system configuration information of the second cell is used to determine at least one of the following: the frequency point of the second cell, the cell identifier of the second cell, the main information block (MIB) of the second cell, the system information block (SIB) of the second cell, the random access resource configuration of the second cell, the downlink control resource configuration of the second cell, the uplink control resource configuration of the second cell, and the index of a second reference signal, wherein the second reference signal includes the synchronization channel or signal of the second cell, or the second reference signal is used by the terminal device to complete time and frequency synchronization with the second cell.

[0279] In some embodiments, the sending module 1010 is configured to send the updated system configuration information of the first cell to a network device in the second cell when the terminal device is in a connected state and the system configuration information of the first cell has changed, and the updated system configuration information of the first cell is sent to the terminal device by the network device in the second cell; or, send the updated system configuration information of the first cell to the terminal device through the time-frequency resources of the first cell.

[0280] In some embodiments, the first cell is the primary cell where the terminal device is stationed, and the second cell is the primary cell for transmission of the terminal device; or, the first cell is the primary cell where the terminal device is stationed, and the second cell is the primary cell for transmission of the terminal device; or, the first cell is a partial primary cell of the terminal device, and the second cell is the primary cell of the terminal device.

[0281] In some embodiments, the first cell is a non-terrestrial network (NTN) cell and the second cell is a terrestrial network (TN) cell; or, the first cell is a TN cell and the second cell is an NTN cell; or, both the first cell and the second cell are TN cells; or, both the first cell and the second cell are NTN cells.

[0282] In some embodiments, the first cell is a 5G cell and the second cell is a 6G cell; or, the first cell is a 6G cell and the second cell is a 5G cell; or, both the first cell and the second cell are 6G cells; or, both the first cell and the second cell are 5G cells.

[0283] In some embodiments, the second configuration information is sent by a network device in the second cell to the first network device.

[0284] In some embodiments, the device 1000 further includes a receiving module (not shown in FIG10).

[0285] The receiving module is configured to receive third configuration information sent by a network device in the second cell, the third configuration information being used to determine that the second configuration information is invalid; wherein, after obtaining the third configuration information, the first network device no longer provides the second configuration information to the terminal device in the first cell.

[0286] It should be noted that the above embodiments only illustrate the division of the above functional modules when implementing the device. In actual applications, the above functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0287] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operations has been described in detail in the embodiments related to the method, and will not be elaborated upon here. For details not described in detail in the apparatus embodiments, please refer to the above method embodiments.

[0288] Please refer to Figure 11, which shows a schematic diagram of a communication device according to an embodiment of this application. The communication device 1100 may include a processor 1101, a transceiver 1102, and a memory 1103. The transceiver 1102 is used to implement sending and / or receiving functions, such as implementing the functions of the sending module and / or receiving module described above. The processor can be used to implement other processing functions or control sending and / or receiving, such as implementing the functions of the processing module described above.

[0289] The processor 1101 includes one or more processing cores. The processor 1101 executes various functional applications and information processing by running software programs and modules.

[0290] The transceiver 1102 may include a receiver and a transmitter. For example, the receiver and transmitter may be implemented as the same wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0291] The memory 1103 can be connected to the processor 1101 and the transceiver 1102.

[0292] The memory 1103 can be used to store computer programs executed by the processor, and the processor 1101 is used to execute the computer programs.

[0293] In some embodiments, when the communication device is a terminal device, the transceiver 1102 is used to receive first configuration information and / or second configuration information sent by the first network device. The first configuration information is used to listen to paging messages of the first cell, and the second configuration information is used to obtain system configuration information of the second cell.

[0294] In some embodiments, when the communication device is a first network device, the transceiver 1102 is used to send first configuration information and / or second configuration information to a terminal device in a first cell. The first configuration information is used to listen for paging messages in the first cell, and the second configuration information is used to obtain system configuration information of a second cell.

[0295] For details not described in this embodiment, please refer to the embodiments above, which will not be repeated here.

[0296] Furthermore, the memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory, erasable programmable read-only memory, statically accessible memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0297] This application also provides a computer-readable storage medium storing a computer program for execution by a processor to implement the aforementioned wireless communication method. In some embodiments, the computer-readable storage medium may include ROM (Read-Only Memory), RAM (Random-Access Memory), SSD (Solid State Drives), or optical disc, etc. The random access memory may include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

[0298] This application also provides a chip, which includes programmable logic circuits and / or program instructions, and is used to implement the above-described wireless communication method when the chip is running.

[0299] This application also provides a computer program product, which includes computer instructions stored in a computer-readable storage medium. A processor reads and executes the computer instructions from the computer-readable storage medium to implement the above-described wireless communication method.

[0300] It should be understood that the term "instruction" mentioned in the embodiments of this application can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0301] In the description of the embodiments of this application, the term "correspondence" may indicate that there is a direct or indirect correspondence between two things, or that there is an association between two things, or that there is a relationship of instruction and being instructed, configuration and being configured, etc.

[0302] In some embodiments of this application, "predefined" can be achieved by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices). This application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol.

[0303] In some embodiments of this application, the term "protocol" may refer to standard protocols in the field of communications, such as LTE protocols, NR protocols, and related protocols applied in future communication systems. This application does not limit the scope of these protocols.

[0304] In this article, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0305] In this article, "greater than or equal to" can mean greater than or equal to, and "less than or equal to" can mean less than or equal to.

[0306] Furthermore, the step numbers described herein are merely illustrative of one possible execution order between steps. In some other embodiments, the steps may not be executed in the order of their numbers, such as two steps with different numbers being executed simultaneously, or two steps with different numbers being executed in the reverse order of the illustration. This application does not limit this.

[0307] Those skilled in the art will recognize that the functions described in the embodiments of this application in one or more of the above examples can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0308] The above description is merely an exemplary embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method of wireless communication, the method comprising: The method is executed by a terminal device, wherein the first network device is a network device in a first cell, and the method includes: The system receives first configuration information and / or second configuration information sent by the first network device. The first configuration information is used to listen to paging messages from the first cell, and the second configuration information is used to obtain system configuration information from the second cell.

2. The method of claim 1, wherein, The first configuration information is used to determine the resource configuration information of the first time-frequency resource.

3. The method of claim 2, wherein, The first time-frequency resource is used by the terminal device to listen to the paging messages of the first cell.

4. The method according to claim 2 or 3, characterized in that, The first configuration information is used to determine at least one of the following: the time domain location of the first time-frequency resource, the frequency domain location of the first time-frequency resource, the identifier of the bandwidth BWP where the first time-frequency resource is located, the frequency domain location of the BWP where the first time-frequency resource is located, and the period corresponding to the first time-frequency resource.

5. The method according to any one of claims 1 to 4, characterized in that, The first configuration information is used to determine at least one of the following: The index of the first reference signal, wherein the first reference signal includes the synchronization channel or signal of the first cell, or the first reference signal is used by the terminal device to complete time-frequency synchronization with the first cell; The cell identifier for each cell in the first cell list; The mapping relationship between the index of the first reference signal and the cell identifier of the cell in the first cell list; The first cell list includes the second cell.

6. The method according to any one of claims 1 to 5, characterized in that, The second configuration information includes the system configuration information of the second cell.

7. The method according to any one of claims 1 to 6, characterized in that, The second configuration information is used to determine the resource configuration information of the second time-frequency resource.

8. The method of claim 7, wherein, The second time-frequency resource is used by the terminal device to send a request message to the network device in the second cell to request system configuration information of the second cell.

9. The method of claim 7, wherein, The second time-frequency resource is used by the terminal device to send a random access channel or signal to the network device in the second cell.

10. The method according to any one of claims 7 to 9, characterized in that, The second configuration information is used to determine at least one of the following: the cell identifier of the second cell, the time domain location of the second time-frequency resource, the frequency domain location of the second time-frequency resource, the identifier of the BWP where the second time-frequency resource is located, the frequency domain location of the BWP where the second time-frequency resource is located, and the period corresponding to the second time-frequency resource.

11. The method according to any one of claims 6 to 9, characterized in that, The second configuration information is used to determine at least one of the following: the cell identifier of each cell in the first cell list, the time-domain location and / or frequency-domain location of the time-frequency resource corresponding to each cell in the first cell list, the identifier and / or frequency-domain location of the BWP where the time-frequency resource corresponding to each cell in the first cell list is located, and the period corresponding to the time-frequency resource corresponding to each cell in the first cell list, wherein the first cell list includes the second cell.

12. The method according to any one of claims 6 to 11, characterized in that, The second configuration information is used to determine the resource configuration information of the third time-frequency resource.

13. The method of claim 12, wherein, The third time-frequency resource is used by the terminal device to listen to the system configuration information of the second cell sent by the network device in the second cell.

14. The method of claim 12, wherein, The third time-frequency resource is used by the terminal device to listen for random access responses sent by network devices in the second cell.

15. The method of claim 8, wherein, The method further includes: After sending the request message, the synchronization channel or signal of the second cell is detected based on the cell identifier of the second cell; or, After sending the request message, based on the cell identifier of the second cell, the synchronization channel or signal of the second cell is detected, and time-frequency synchronization with the second cell is completed based on the synchronization channel or signal of the second cell; or, After sending the request message, listen for the system configuration information of the second cell sent by the network device in the second cell on the third time-frequency resource; or... After sending the request message and completing time-frequency synchronization with the second cell, the system configuration information of the second cell sent by the network device in the second cell is monitored on the third time-frequency resource; or, After sending the request message, based on the time-frequency synchronization with the first cell, the system configuration information of the second cell sent by the network device in the second cell is monitored on the third time-frequency resource.

16. The method of claim 9, wherein, The method further includes: After transmitting the random access channel or signal, the synchronization channel or signal of the second cell is detected based on the cell identifier of the second cell; or, After transmitting the random access channel or signal, the synchronization channel or signal of the second cell is detected according to the cell identifier of the second cell, and time-frequency synchronization with the second cell is completed based on the synchronization channel or signal of the second cell; or, After transmitting the random access channel or signal, listen for the random access response transmitted by the network device in the second cell on the third time-frequency resource; or, After sending the random access channel or signal and completing time-frequency synchronization with the second cell, the random access response sent by the network device in the second cell is monitored on the third time-frequency resource; or, After sending the random access channel or signal, the random access response sent by the network device in the second cell is monitored on the third time-frequency resource according to the time-frequency synchronization with the first cell.

17. The method according to any one of claims 1 to 16, characterized in that, The first configuration information is used to determine the mapping relationship between the index of the first reference signal and the cell identifier of the cell in the first cell list, and the method further includes: Based on the first reference signal received from the first cell and in conjunction with the mapping relationship, the cell indicated by the cell identifier corresponding to the index of the first reference signal that satisfies the first condition is determined as the second cell.

18. The method according to any one of claims 1 to 16, characterized in that, The second configuration information is used to determine the cell identifier of each cell in the first cell list, and the method further includes: Detect the synchronization channels or signals of cells other than the first cell; Based on the detected synchronization channel or signal, the cell indicated by the corresponding cell identifier is determined from the first cell list as the second cell.

19. The method according to any one of claims 1 to 18, characterized in that, The system configuration information of the second cell is used to determine at least one of the following: the frequency point of the second cell, the cell identifier of the second cell, the main information block (MIB) of the second cell, the system information block (SIB) of the second cell, the random access resource configuration of the second cell, the downlink control resource configuration of the second cell, the uplink control resource configuration of the second cell, and the index of the second reference signal, wherein the second reference signal includes the synchronization channel or signal of the second cell, or the second reference signal is used by the terminal device to complete time and frequency synchronization with the second cell.

20. The method according to any one of claims 1 to 19, characterized in that, The method further includes: When the terminal device is in an idle or disconnected state, it listens for paging messages in the first cell according to the first configuration information.

21. The method according to any one of claims 1 to 20, characterized in that, The method further includes: When the terminal device receives a paging message from the first cell, and the paging message is used to page the terminal device, it determines whether to transition from an idle state or a disconnected state to a connected state; and / or, When the terminal device determines that it is entering the connected state from the idle state or the disconnected state, it accesses the second cell according to the second configuration information.

22. The method according to any one of claims 1 to 21, characterized in that, The method further includes: When the terminal device switches from connected state to idle state or disconnected state, it listens for paging messages in the first cell according to the first configuration information.

23. The method according to any one of claims 1 to 22, characterized in that, When the terminal device is in a connected state and the system configuration information of the first cell changes, the method further includes: The updated system configuration information of the first cell is received from the network devices in the second cell using the time-frequency resources of the second cell; or... The updated system configuration information of the first cell sent by the first network device is received through the time-frequency resources of the first cell.

24. The method according to any one of claims 1 to 23, characterized in that, When the terminal device is in an idle or disconnected state, the terminal device maintains time-frequency synchronization with the first cell; and / or, When the terminal device is in a connected state, the terminal device maintains time and frequency synchronization with the second cell.

25. The method according to any one of claims 1 to 24, characterized in that, When the terminal device is in an idle or disconnected state, the terminal device does not need to maintain time-frequency synchronization with the second cell; when the terminal device is in a connected state, the terminal device does not need to maintain time-frequency synchronization with the first cell; or, When the terminal device is in an idle or disconnected state, the terminal device does not need to maintain time-frequency synchronization with the second cell; when the terminal device is in a connected state, the terminal device maintains time-frequency synchronization with the first cell; or, When the terminal device is in an idle or disconnected state, the terminal device maintains time-frequency synchronization with the second cell; when the terminal device is in a connected state, the terminal device maintains time-frequency synchronization with the first cell.

26. The method according to any one of claims 1 to 25, characterized in that, The first cell is the primary cell where the terminal device is camped, and the second cell is the primary cell for transmission of the terminal device; or, The first cell is the cell where the terminal device is camped, and the second cell is the transmission cell of the terminal device; or, The first cell is a portion of the primary cells of the terminal device, and the second cell is the primary cell of the terminal device; or... The first cell is the main cell of the terminal device, and the second cell is a partial main cell of the terminal device.

27. The method according to any one of claims 1 to 26, characterized in that, The first cell is a non-terrestrial network (NTN) cell, and the second cell is a terrestrial network (TN) cell; or, The first cell is a TN cell, and the second cell is an NTN cell; or, Both the first cell and the second cell are TN cells; or, Both the first cell and the second cell are NTN cells.

28. The method according to any one of claims 1 to 27, characterized in that, The first cell is a 5G cell, and the second cell is a 6G cell; or, The first cell is a 6G cell, and the second cell is a 5G cell; or, Both the first cell and the second cell are 6G cells; or, Both the first cell and the second cell are 5G cells.

29. A method of wireless communication, the method comprising: The method is performed by a first network device, wherein the first network device is a network device in a first cell, and the method includes: Send first configuration information and / or second configuration information to the terminal device in the first cell. The first configuration information is used to listen for paging messages in the first cell, and the second configuration information is used to obtain system configuration information of the second cell.

30. The method of claim 29, wherein, The first configuration information is used to determine the resource configuration information of the first time-frequency resource.

31. The method of claim 30, wherein, The first time-frequency resource is used by the terminal device to listen to the paging messages of the first cell.

32. The method of claim 30 or 31, wherein, The first configuration information is used to determine at least one of the following: the time domain location of the first time-frequency resource, the frequency domain location of the first time-frequency resource, the identifier of the bandwidth BWP where the first time-frequency resource is located, the frequency domain location of the BWP where the first time-frequency resource is located, and the period corresponding to the first time-frequency resource.

33. The method of any one of claims 29 to 32, wherein, The first configuration information is used to determine at least one of the following: The index of the first reference signal, wherein the first reference signal includes the synchronization channel or signal of the first cell, or the first reference signal is used by the terminal device to complete time-frequency synchronization with the first cell; The cell identifier for each cell in the first cell list; The mapping relationship between the index of the first reference signal and the cell identifier of the cell in the first cell list; The first cell list includes the second cell.

34. The method according to any one of claims 29 to 33, characterized in that, The second configuration information includes the system configuration information of the second cell.

35. The method of any one of claims 29 to 34, wherein, The second configuration information is used to determine the resource configuration information of the second time-frequency resource.

36. The method of claim 35, wherein, The second time-frequency resource is used by the terminal device to send a request message to the network device in the second cell to request system configuration information of the second cell.

37. The method of claim 35, wherein, The second time-frequency resource is used by the terminal device to send a random access channel or signal to the network device in the second cell.

38. The method of any one of claims 35 to 37, wherein, The second configuration information is used to determine at least one of the following: the cell identifier of the second cell, the time domain location of the second time-frequency resource, the frequency domain location of the second time-frequency resource, the identifier of the BWP where the second time-frequency resource is located, the frequency domain location of the BWP where the second time-frequency resource is located, and the period corresponding to the second time-frequency resource.

39. The method of any one of claims 34 to 37, wherein, The second configuration information is used to determine or indicate at least one of the following: the cell identifier of each cell in the first cell list, the time-domain location and / or frequency-domain location of the time-frequency resource corresponding to each cell in the first cell list, the identifier and / or frequency-domain location of the BWP where the time-frequency resource corresponding to each cell in the first cell list is located, and the period corresponding to the time-frequency resource corresponding to each cell in the first cell list, wherein the first cell list includes the second cell.

40. The method of any one of claims 34 to 39, wherein, The second configuration information is used to determine the resource configuration information of the third time-frequency resource.

41. The method of claim 39, wherein, The third time-frequency resource is used by the terminal device to listen to the system configuration information of the second cell sent by the network device in the second cell.

42. The method of claim 39, wherein, The third time-frequency resource is used by the terminal device to listen for random access responses sent by the second network device.

43. The method of any one of claims 29 to 42, wherein, The system configuration information of the second cell is used to determine at least one of the following: the frequency point of the second cell, the cell identifier of the second cell, the main information block (MIB) of the second cell, the system information block (SIB) of the second cell, the random access resource configuration of the second cell, the downlink control resource configuration of the second cell, the uplink control resource configuration of the second cell, and the index of the second reference signal, wherein the second reference signal includes the synchronization channel or signal of the second cell, or the second reference signal is used by the terminal device to complete time and frequency synchronization with the second cell.

44. The method of any one of claims 29 to 43, wherein, The method further includes: When the terminal device is in a connected state and the system configuration information of the first cell changes, the updated system configuration information of the first cell is sent to the network device in the second cell, and the updated system configuration information of the first cell is sent to the terminal device by the network device in the second cell; or, The updated system configuration information of the first cell is sent to the terminal device using the time-frequency resources of the first cell.

45. The method according to any one of claims 29 to 44, characterized in that, The first cell is the primary cell where the terminal device is camped, and the second cell is the primary cell for transmission of the terminal device; or, The first cell is the cell where the terminal device is camped, and the second cell is the transmission cell of the terminal device; or, The first cell is a part of the main cell of the terminal device, and the second cell is the main cell of the terminal device.

46. ​​The method according to any one of claims 29 to 45, characterized in that, The first cell is a non-terrestrial network (NTN) cell, and the second cell is a terrestrial network (TN) cell; or, The first cell is a TN cell, and the second cell is an NTN cell; or, Both the first cell and the second cell are TN cells; or, Both the first cell and the second cell are NTN cells.

47. The method according to any one of claims 29 to 46, characterized in that, The first cell is a 5G cell, and the second cell is a 6G cell; or, The first cell is a 6G cell, and the second cell is a 5G cell; or, Both the first cell and the second cell are 6G cells; or, Both the first cell and the second cell are 5G cells.

48. The method of any one of claims 29 to 47, wherein, The second configuration information is sent from the network device in the second cell to the first network device.

49. The method of any one of claims 29 to 48, wherein, The method further includes: The first network device receives third configuration information sent by a network device in the second cell, the third configuration information being used to determine that the second configuration information is invalid; wherein, after obtaining the third configuration information, the first network device no longer provides the second configuration information to the terminal device in the first cell.

50. A wireless communication apparatus, characterized by: The device includes: The receiving module is configured to receive first configuration information and / or second configuration information sent by a first network device. The first configuration information is used to listen for paging messages in a first cell, and the second configuration information is used to obtain system configuration information of a second cell. The first network device is a network device in the first cell.

51. A wireless communication device, comprising: The device includes: The sending module is used to send first configuration information and / or second configuration information to terminal devices in the first cell. The first configuration information is used to listen for paging messages in the first cell, and the second configuration information is used to obtain system configuration information of the second cell. The first network device is a network device in the first cell.

52. A communications device, comprising: The communication device includes a processor and a memory, the memory storing a computer program, the processor executing the computer program to implement the method as claimed in any one of claims 1 to 28, or to implement the method as claimed in any one of claims 29 to 49.

53. A computer-readable storage medium, characterized in that, The storage medium stores a computer program that is executed by a processor to implement the method as described in any one of claims 1 to 28, or to implement the method as described in any one of claims 29 to 49.

54. A chip, comprising: The chip includes programmable logic circuitry and / or program instructions, which, when the chip is running, are used to implement the method as described in any one of claims 1 to 28, or to implement the method as described in any one of claims 29 to 49.

55. A computer program product, characterised in that, The computer program product includes computer instructions stored in a computer-readable storage medium, which a processor reads from and executes to implement the method as claimed in any one of claims 1 to 28, or the method as claimed in any one of claims 29 to 49.

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