Cell reselection method, terminal equipment and network equipment

Abstract

The present application provides a cell reselection method, terminal device and network device. To avoid a terminal device from reselecting a cell that does not support the bandwidth of the terminal device, the terminal device may be a low-bandwidth terminal device, thereby reducing the cell reselection time of the terminal device and reducing the power consumption of the terminal device. The method includes: the terminal device receives first indication information sent by a network device, the first indication information is used to indicate information of an initial bandwidth portion of a first cell, wherein the first cell is a neighboring cell of a second cell, and the second cell is a cell where the terminal device currently resides; the terminal device determines whether to reselect to the first cell according to the type of the terminal device and the first indication information.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular to a cell reselection method, terminal equipment and network equipment. Background Art

[0002] The current 5G new radio access technology (NR) system requires terminal devices to have strong capabilities, such as multiple antennas and support for large bandwidth, in order to ensure that terminal devices can achieve higher service rates and lower latency. However, in actual scenarios, some terminal devices, such as machine type communication (MTC) devices, do not have such high requirements for service rates and latency, but instead need to control the cost of terminal devices, that is, terminal devices cannot have strong multi-antenna or large bandwidth capabilities.

[0003] For terminal devices that do not support large bandwidth, when searching or reselecting a cell, it is often necessary to continue searching or reselecting cells until a suitable cell is found to reside in because the bandwidth of the cell searched or reselected is not suitable. This not only increases the cell search and cell reselection time of these terminal devices, but also increases the power consumption of the terminal devices. Summary of the invention

[0004] The present application provides a cell reselection method, terminal equipment and network equipment to prevent a terminal equipment from reselecting a cell that does not support the bandwidth of the terminal equipment.

[0005] In a first aspect, a cell reselection method is provided, comprising: a terminal device receives first indication information sent by a network device, the first indication information is used to indicate information of an initial bandwidth portion of a first cell, wherein the first cell is a neighboring cell of a second cell, and the second cell is a cell in which the terminal device is currently located; the terminal device determines whether to reselect to the first cell based on the type of the terminal device and the first indication information.

[0006] In the above technical solution, the terminal device can obtain the information of the initial bandwidth part of the first cell according to the first indication information sent by the network device. The terminal device decides whether to reselect to the first cell according to whether the information of the initial bandwidth part of the first cell matches the type of the terminal device, thereby avoiding the terminal device reselecting to a cell that does not support the bandwidth of the terminal device.

[0007] Specifically, if the terminal device decides whether to reselect to the first cell only based on the signal quality of the first cell, it may cause the terminal device to be unable to reside in the first cell when reselecting to the first cell because the initial bandwidth part of the target cell is not supported. The terminal device of the above technical solution of the present application can determine whether the bandwidth of the first cell supports the type of the terminal device before reselecting to the first cell. This can avoid reselecting to an inappropriate cell, thereby reducing the cell reselection time of the terminal device and the power consumption of the terminal device.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the terminal device determines whether to reselect to the first cell based on the type of the terminal device and the first indication information, including: when the terminal device detects that the first cell meets the reselection measurement criteria, if the type of the terminal device does not support the initial bandwidth part of the first cell, the terminal device does not measure the first cell; if the type of the terminal device supports the initial bandwidth part of the first cell, the terminal device measures the first cell.

[0009] In the above technical solution, cell reselection is the process of the terminal device selecting a more suitable cell. If there are some cells with higher priority or better signals in the neighboring cells of the cell where the current terminal device resides, the protocol stipulates the cell reselection measurement criteria to determine which of these neighboring cells need to be measured. When the first cell meets the reselection measurement criteria and needs to be measured, the terminal device decides whether to measure the first cell based on the initial bandwidth part of the first cell, so as to avoid the terminal device measuring cells that are not supported by the bandwidth, thereby further reducing the power consumption of the terminal device.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the terminal device determines whether to reselect to the first cell based on the first indication information, including: when the terminal device determines that the first cell is the target cell, then if the type of the terminal device does not support the initial bandwidth part of the first cell, the terminal device does not reselect to the first cell; if the type of the terminal device supports the initial bandwidth part of the first cell, the terminal device reselects from the second cell to the first cell.

[0011] In the above technical solution, the first cell is the target cell of the terminal device, and the target cell refers to the cell that is most suitable for the terminal device to reside in among all neighboring cells that meet the above cell reselection measurement criteria, such as the cell with the strongest signal strength. The terminal device decides whether to reselect to the first cell based on the initial bandwidth portion of the first cell, so as to avoid the terminal device from reselecting to a cell whose bandwidth is not supported, thereby reducing the power consumption of the terminal device.

[0012] In combination with the first aspect, in some implementations of the first aspect, the type of the terminal device is a first type terminal device or a second type terminal device, and the first type terminal device and the second type terminal device have different bandwidth capabilities. For example, the first terminal device may include a legacy NR terminal device, and the second terminal device may include a lightweight NR terminal device. The lightweight NR terminal device may also be referred to as an NR-light terminal device, and the bandwidth of the NR terminal device is greater than the bandwidth of the lightweight NR terminal device.

[0013] In the above technical solution, the bandwidth capabilities of the first type of terminal devices and the second type of terminal devices are different. The first type of terminal devices and the second type of terminal devices can determine whether to measure or reselect to the first cell based on whether their own bandwidth capabilities match the information of the initial bandwidth part of the first cell.

[0014] In combination with the first aspect, in certain implementations of the first aspect, the information of the initial bandwidth part of the first cell includes one or more of the following information: bandwidth width of the initial bandwidth part of the first cell, and type of the initial bandwidth part of the first cell.

[0015] In the above technical solution, the first type terminal device and the second type terminal device can determine whether to measure or reselect to the first cell based on whether their device type matches the bandwidth width and / or type of the initial bandwidth part of the first cell.

[0016] In combination with the first aspect, in certain implementations of the first aspect, the types of the initial bandwidth parts of the first cell include: an initial bandwidth part supporting the residence of a first type of terminal device, an initial bandwidth part supporting the residence of a second type of terminal device, and an initial bandwidth part supporting the residence of both the first type of terminal device and the second type of terminal device.

[0017] In the above technical solution, the first type of terminal equipment and the second type of terminal equipment can determine whether to measure or reselect to the first cell based on whether their own equipment types match the type of the initial bandwidth part of the first cell. In the second aspect, a cell reselection method is provided, including: a network device sends first indication information to the terminal device, and the first indication information is used to indicate information about the initial bandwidth part of the first cell, wherein the first cell is a neighboring cell of the second cell, and the second cell is the cell where the terminal device is currently residing.

[0018] In a second aspect, a cell reselection method is provided, comprising: a network device sends first indication information to a terminal device, the first indication information is used to indicate information of an initial bandwidth portion of a first cell, wherein the first cell is a neighboring cell of a second cell, and the second cell is a cell in which the terminal device is currently residing.

[0019] In combination with the second aspect, in certain implementations of the second aspect, the information of the initial bandwidth part of the first cell includes one or more of the following information: bandwidth width of the initial bandwidth part of the first cell, and type of the initial bandwidth part of the first cell.

[0020] In combination with the second aspect, in certain implementations of the second aspect, the types of the initial bandwidth part of the first cell include: an initial bandwidth part supporting the residence of a first type of terminal device, an initial bandwidth part supporting the residence of a second type of terminal device, and an initial bandwidth part supporting the residence of both the first type of terminal device and the second type of terminal device, wherein the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0021] Regarding the technical effects brought about by the second aspect or various embodiments of the second aspect, reference can be made to the introduction to the technical effects of the first aspect or various embodiments of the first aspect, and no further details will be given.

[0022] According to a third aspect, a method for initial cell access is provided, comprising: a terminal device receives a first synchronization signal block from a network device, the first synchronization signal block includes first indication information, the first indication information is used to indicate a cell type of a first cell, and the first cell is a cell defined by a second synchronization signal block; the first synchronization signal block includes second indication information, and the second indication information is used to indicate a position of the second synchronization signal block; wherein the first synchronization signal block is a synchronization signal block for an undefined cell, and the second synchronization signal block is a synchronization signal block for a defined cell; the terminal device determines whether to search for the second synchronization signal block at the position of the second synchronization signal block according to the type of the terminal device and the cell type of the first cell.

[0023] In the above technical solution, the second synchronization signal block defines the first cell. The terminal device can obtain the cell type of the first cell and the position of the second synchronization signal block according to the first indication information and the second indication information sent by the network device. The terminal device determines whether to search for the second synchronization signal block at the position of the second synchronization signal block according to whether the type of the terminal device matches the cell type of the first cell, so as to avoid the terminal device searching for a cell that does not match its own type.

[0024] Specifically, in the prior art, as long as the terminal device finds that the second synchronization signal defines a cell, it will search for the cell at the location of the second synchronization signal block. When staying in the cell, it may not be able to stay because the cell type does not match the cell. The above technical solution uses the cell type indicated by the first indication information before searching for the second synchronization signal. The terminal device can quickly determine whether the cell defined by the second synchronization signal block is suitable for staying, and then determine whether to search for the second synchronization signal. This not only reduces the time for the terminal device to search for a suitable cell to stay in, but also reduces the power consumption of the terminal device.

[0025] In combination with the third aspect, in some implementations of the third aspect, the type of the terminal device is a first type terminal device or a second type terminal device, and the bandwidth capabilities of the first type terminal device and the second type terminal device are different. For example, the first terminal device includes an NR terminal device, and the second terminal device includes a lightweight NR terminal device, which may also be referred to as an NR-light terminal device, and the bandwidth of the NR terminal device is greater than the bandwidth of the lightweight NR terminal device.

[0026] In the above technical solution, the bandwidth capabilities of the first type of terminal equipment and the second type of terminal equipment are different. The second synchronization signal block defines the first cell. The first type of terminal equipment and the second type of terminal equipment can determine whether to search for the second synchronization signal block at the location of the second synchronization signal block based on whether their bandwidth capabilities match the cell type of the first cell, so as to quickly find a cell suitable for the terminal equipment to reside and reduce the power consumption of the terminal equipment.

[0027] In combination with the third aspect, in certain implementations of the third aspect, the cell types include: cells supporting first type terminal devices, cells supporting second type terminal devices, and cells supporting both first type terminal devices and second type terminal devices.

[0028] In the above technical solution, different types of cells support different types of terminal devices to reside, and the second synchronization signal block defines the first cell. The first type of terminal device and the second type of terminal device determine whether to search for the second synchronization signal block at the location of the second synchronization signal block based on whether the type of the terminal device matches the cell type of the first cell, so as to quickly find a cell suitable for the terminal device to reside and reduce the power consumption of the terminal device.

[0029] In combination with the third aspect, in certain implementations of the third aspect, before the terminal device receives the first synchronization signal block, the method also includes: the terminal device searches for the synchronization signal block in the frequency domain according to a preset step size, and the synchronization signal block is the first synchronization signal block.

[0030] In a fourth aspect, a method for initial cell access is provided, comprising: a network device sends a first synchronization signal block to a terminal device, the first synchronization signal block includes first indication information, the first indication information is used to indicate the cell type of a first cell, and the first cell is a cell defined by a second synchronization signal block; the first synchronization signal block includes second indication information, and the second indication information is used to indicate the position of the second synchronization signal block; wherein the first synchronization signal block is a synchronization signal block for an undefined cell, and the second synchronization signal block is a synchronization signal block for a defined cell.

[0031] In combination with the fourth aspect, in certain implementations of the fourth aspect, the cell types include: cells supporting the residence of first type terminal devices, cells supporting the residence of second type terminal devices, and cells supporting the residence of both first type terminal devices and second type terminal devices, wherein the bandwidth capabilities of the first type terminal devices and the second type terminal devices are different.

[0032] Regarding the technical effects brought about by the fourth aspect or the various implementation methods of the fourth aspect, reference can be made to the introduction to the technical effects of the third aspect or the various implementation methods of the third aspect, and no further details will be given.

[0033] In a fifth aspect, a method for initial cell access is provided, including: a terminal device receives third indication information, the third indication information includes a first prohibited parameter and a second prohibited parameter, wherein the first prohibited parameter is used for a first type of terminal device to perform initial access to a first cell, and the second prohibited parameter is used for a second type of terminal device to perform initial access to the first cell, and the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different; the terminal device determines to use the first prohibited parameter or the second prohibited parameter according to the type of the terminal device.

[0034] In the above technical solution, two sets of cell prohibition parameters are configured. The terminal device can flexibly select the corresponding first cell prohibition parameters from the two sets of cell prohibition parameters according to its own type, and then determine whether to access the first cell or other cells with the same frequency as the first cell according to the corresponding cell prohibition parameters.

[0035] In a sixth aspect, a method for initial access to a cell is provided, comprising: a network device sends a third indication information, the third indication information comprising a first prohibited parameter and a second prohibited parameter, wherein the first prohibited parameter is used for a first type of terminal device to perform initial access to a first cell, and the second prohibited parameter is used for a second type of terminal device to perform initial access to the first cell, wherein the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0036] Regarding the technical effects brought about by the sixth aspect, please refer to the introduction of the technical effects of the fifth aspect and I will not go into details.

[0037] In the seventh aspect, a terminal device is provided, including: a transceiver unit, used to receive first indication information sent by a network device, the first indication information is used to indicate information of an initial bandwidth part of a first cell, wherein the first cell is a neighboring cell of a second cell, and the second cell is a cell where the terminal device is currently residing; a processing unit, used to determine whether to reselect to the first cell according to the type of the terminal device and the first indication information.

[0038] In combination with the seventh aspect, in certain implementations of the seventh aspect, the processing unit is specifically used to: when it is detected that the first cell meets the reselection measurement criteria, if the type of the terminal device does not support the initial bandwidth part of the first cell, then the first cell is not measured; if the type of the terminal device supports the initial bandwidth part of the first cell, then the first cell is measured.

[0039] In combination with the seventh aspect, in certain implementations of the seventh aspect, the processing unit is specifically used to: when the first cell is determined to be the target cell, if the type of the terminal device does not support the initial bandwidth part of the first cell, control the terminal device not to reselect to the first cell; if the type of the terminal device supports the initial bandwidth part of the first cell, control the terminal device to reselect from the second cell to the first cell.

[0040] In combination with the seventh aspect, in certain implementations of the seventh aspect, the type of the terminal device is a first type terminal device or a second type terminal device, and the bandwidth capabilities of the first type terminal device and the second type terminal device are different.

[0041] In combination with the seventh aspect, in certain implementations of the seventh aspect, the information of the initial bandwidth part of the first cell includes one or more of the following information: the bandwidth width of the initial bandwidth part of the first cell, and the type of the initial bandwidth part of the first cell.

[0042] In combination with the seventh aspect, in certain implementations of the seventh aspect, the types of the initial bandwidth parts of the first cell include: an initial bandwidth part supporting the residence of a first type of terminal device, an initial bandwidth part supporting the residence of a second type of terminal device, and an initial bandwidth part supporting the residence of both the first type of terminal device and the second type of terminal device.

[0043] In an eighth aspect, a network device is provided, comprising: a transceiver unit, used to send first indication information to a terminal device, the first indication information being used to indicate information of an initial bandwidth portion of a first cell, wherein the first cell is a neighboring cell of a second cell, and the second cell is a cell in which the terminal device is currently residing.

[0044] In combination with the eighth aspect, in certain implementations of the eighth aspect, the information of the initial bandwidth part of the first cell includes one or more of the following information: the bandwidth width of the initial bandwidth part of the first cell, and the type of the initial bandwidth part of the first cell.

[0045] In combination with the eighth aspect, in certain implementations of the eighth aspect, the types of the initial bandwidth part of the first cell include: an initial bandwidth part supporting the residence of a first type of terminal device, an initial bandwidth part supporting the residence of a second type of terminal device, and an initial bandwidth part supporting the residence of both the first type of terminal device and the second type of terminal device, wherein the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0046] In the ninth aspect, a terminal device is provided, including: a transceiver unit, used to receive a first synchronization signal block from a network device, the first synchronization signal block including first indication information, the first indication information being used to indicate a cell type of a first cell, the first cell being a cell defined by a second synchronization signal block; the first synchronization signal block including second indication information, the second indication information being used to indicate a position of the second synchronization signal block; wherein the first synchronization signal block is a synchronization signal block for an undefined cell, and the second synchronization signal block is a synchronization signal block for a defined cell; a processing unit, used to determine whether to search for the second synchronization signal block at the position of the second synchronization signal block according to the type of the terminal device and the cell type of the first cell.

[0047] In combination with the ninth aspect, in certain implementations of the ninth aspect, the type of the terminal device is a first type terminal device or a second type terminal device, and the bandwidth capabilities of the first type terminal device and the second type terminal device are different.

[0048] In combination with the ninth aspect, in certain implementations of the ninth aspect, the cell types include: cells supporting first type terminal devices, cells supporting second type terminal devices, and cells supporting both first type terminal devices and second type terminal devices.

[0049] In combination with the ninth aspect, in certain implementations of the ninth aspect, the processing unit searches for a synchronization signal block in the frequency domain according to a preset step size, and the synchronization signal block is a first synchronization signal block.

[0050] In the tenth aspect, a network device is provided, including: a transceiver unit, used to send a first synchronization signal block to a terminal device, the first synchronization signal block including first indication information, the first indication information being used to indicate a cell type of a first cell, the first cell being a cell defined by a second synchronization signal block; the first synchronization signal block including second indication information, the second indication information being used to indicate a location of the second synchronization signal block; wherein the first synchronization signal block is a synchronization signal block for an undefined cell, and the second synchronization signal block is a synchronization signal block for a defined cell.

[0051] In combination with the tenth aspect, in certain implementations of the tenth aspect, the cell types include: cells supporting the residence of first type terminal devices, cells supporting the residence of second type terminal devices, and cells supporting the residence of both first type terminal devices and second type terminal devices, wherein the bandwidth capabilities of the first type terminal devices and the second type terminal devices are different.

[0052] In the eleventh aspect, a terminal device is provided, including: a transceiver unit, used to receive third indication information sent by a network device, the third indication information including a first prohibited parameter and a second prohibited parameter, wherein the first prohibited parameter is used for a first type of terminal device to perform initial access to a first cell, and the second prohibited parameter is used for a second type of terminal device to perform initial access to the first cell, and the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different; a processing unit, used to determine whether to use the first prohibited parameter or the second prohibited parameter according to the type of the terminal device.

[0053] In the twelfth aspect, a network device is provided, including: a transceiver unit, used to send third indication information to a terminal device, the third indication information includes a first prohibition parameter and a second prohibition parameter, wherein the first prohibition parameter is used for a first type of terminal device to perform initial access to a first cell, and the second prohibition parameter is used for a second type of terminal device to perform initial access to the first cell, wherein the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0054] Regarding the technical effects brought about by the various implementation methods of the seventh to twelfth aspects or the seventh to twelfth aspects, you can refer to the introduction of the technical effects on the method side of the various implementation methods of the first to sixth aspects or the first to sixth aspects, and no further details are given here.

[0055] In a thirteenth aspect, a communication device is provided, comprising a processor. The processor is coupled to a memory and can be used to execute instructions in the memory to implement the method in the first aspect, the third aspect, or the fifth aspect and any possible implementation of the first aspect, the third aspect, or the fifth aspect. Optionally, the communication device also includes a memory. Optionally, the communication device also includes a communication interface, and the processor is coupled to the communication interface.

[0056] In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver, or an input / output interface.

[0057] In another implementation, the communication device is a chip configured in a terminal device. When the communication device is a chip configured in a terminal device, the communication interface may be an input / output interface.

[0058] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0059] In a fourteenth aspect, a communication device is provided, comprising a processor. The processor is coupled to a memory and can be used to execute instructions in the memory to implement the method in the second aspect, the fourth aspect, or the sixth aspect and any possible implementation of the second aspect, the fourth aspect, or the sixth aspect. Optionally, the communication device also includes a memory. Optionally, the communication device also includes a communication interface, and the processor is coupled to the communication interface.

[0060] In one implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver, or an input / output interface.

[0061] In another implementation, the communication device is a chip configured in a network device. When the communication device is a chip configured in a network device, the communication interface may be an input / output interface.

[0062] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0063] In a fifteenth aspect, a processor is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is used to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any possible implementation of the first to sixth aspects and the first to sixth aspects.

[0064] In the specific implementation process, the processor can be one or more chips, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a trigger, and various logic circuits. The input signal received by the input circuit can be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit can be, for example, but not limited to, output to a transmitter and transmitted by the transmitter, and the input circuit and the output circuit can be the same circuit, which is used as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation methods of the processor and various circuits.

[0065] In a sixteenth aspect, a processing device is provided, comprising a processor and a memory. The processor is used to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter to execute the method in any possible implementation of the first to sixth aspects and the first to sixth aspects.

[0066] Optionally, the number of the processors is one or more, and the number of the memories is one or more.

[0067] Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

[0068] In the specific implementation process, the memory can be a non-transitory memory, such as a read-only memory (ROM), which can be integrated with the processor on the same chip or can be set on different chips respectively. The embodiments of the present application do not limit the type of memory and the setting method of the memory and the processor.

[0069] It should be understood that the relevant data interaction process, such as sending indication information, can be a process of outputting indication information from the processor, and receiving capability information can be a process of receiving input capability information from the processor. Specifically, the data output by the processor can be output to the transmitter, and the input data received by the processor can come from the receiver. Among them, the transmitter and the receiver can be collectively referred to as a transceiver.

[0070] The processing device in the above-mentioned sixteenth aspect may be one or more chips. The processor in the processing device may be implemented by hardware or by software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor may be a general-purpose processor implemented by reading software codes stored in a memory, and the memory may be integrated in the processor or located outside the processor and exist independently.

[0071] In the seventeenth aspect, a computer program product is provided, comprising: a computer program (also referred to as code, or instruction), which, when executed, enables a computer to execute the method in the above-mentioned first to sixth aspects and any possible implementation of the first to sixth aspects.

[0072] In the eighteenth aspect, a computer-readable storage medium is provided, which stores a computer program (also referred to as code, or instructions). When the computer-readable storage medium is run on a computer, the computer executes the method in the above-mentioned first to sixth aspects and any possible implementation of the first to sixth aspects.

[0073] In the nineteenth aspect, a communication system is provided, comprising the terminal device in the seventh aspect or the ninth aspect or the eleventh aspect or the thirteenth aspect and the network device in the eighth aspect or the tenth aspect or the twelfth aspect or the fourteenth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 It is a schematic diagram of a network architecture provided in an embodiment of the present application.

[0075] Figure 2 This is a schematic diagram of a possible deployment method of a synchronization signal block and an initial bandwidth part in a lightweight NR system applicable to an embodiment of the present application.

[0076] Figure 3 This is a schematic diagram of another possible deployment method of synchronization signal blocks and initial bandwidth parts in the lightweight NR system of an embodiment of the present application.

[0077] Figure 4 It is a schematic interaction diagram of a cell initial access method provided in an embodiment of the present application.

[0078] Figure 5 It is a schematic interactive diagram of a cell reselection method provided in an embodiment of the present application.

[0079] Figure 6 It is a schematic interaction diagram of another cell initial access method provided in an embodiment of the present application.

[0080] Figure 7 It is a schematic block diagram of a communication device provided in an embodiment of the present application.

[0081] Figure 8 A schematic block diagram of another communication device provided in an embodiment of the present application.

[0082] Fig. 9 A schematic block diagram of a terminal device provided in an embodiment of the present application.

[0083] Fig.10 A schematic block diagram of a network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0084] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0085] The technical solution of the embodiment of the present application can be applied to various communication systems, such as: long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, future fifth generation (5G) system or new radio (NR), vehicle-to-X V2X, where V2X may include vehicle to network (V2N), vehicle to vehicle (V2V), vehicle to infrastructure (V2I), vehicle to pedestrian (V2P), etc., long term evolution-vehicle (LTE-V), Internet of Vehicles, machine type communication (MTC), Internet of Things (IoT), etc. things, IoT), long-term evolution-machine (LTE-M), machine to machine (M2M), etc.

[0086] The technical solution provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, etc. This application does not limit this.

[0087] Figure 1 FIG. 1 is a schematic diagram of a network architecture provided by an embodiment of the present application. Figure 1 As shown, the communication system of the embodiment of the present application may include a network device and multiple terminal devices. The network device may include one antenna or multiple antennas. In addition, the network device may additionally include a transmitter chain and a receiver chain, and those skilled in the art will understand that they may include multiple components related to signal transmission and reception (such as processors, modulators, multiplexers, demodulators, demultiplexers or antennas, etc.).

[0088] The network device can communicate with multiple terminal devices. The terminal device in the embodiment of the present application can also be called: user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0089] The terminal device may be a device that provides voice / data connectivity to users, such as a handheld device or vehicle-mounted device with wireless connection function. At present, some examples of terminal devices are: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or future evolved public land mobile communication networks (public land mobile The present invention relates to a terminal device in a wireless communication system (PLMN) and / or any other suitable device for communicating on a wireless communication system, which is not limited in the embodiments of the present application.

[0090] Among them, wearable devices can also be called wearable smart devices, which are a general term for the intelligent design and development of wearable devices for daily wear using wearable technology, such as glasses, gloves, watches, clothing and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also realize powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and independent of smartphones to achieve complete or partial functions, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0091] In addition, in the embodiments of the present application, the terminal device can also be a terminal device in an Internet of Things system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network that interconnects people and machines and things.

[0092] In addition, in the embodiments of the present application, the terminal device may also include sensors such as smart printers, train detectors, gas stations, etc., and its main functions include collecting data (partial terminal devices), receiving control information and downlink data from network devices, and sending electromagnetic waves to transmit uplink data to network devices.

[0093] The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may be an evolved node B (eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (CRAN) scenario, or a radio network controller (RNC), a base station controller (BSC), a home base station (e.g., home evolved nodeB, or home nodeB, HNB), a baseband unit (BBU), or the network device may be a relay station, an access point, an on-board device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network, etc., and may be an access point (AP) in a wireless local area network (WLAN), a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc., and may be a new wireless system (new The invention relates to a gNB or a transmission point (TRP or TP) in a new wireless radio (NR) system, or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU), etc., which is not limited in the embodiments of the present application.

[0094] In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include an active antenna unit (AAU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB, for example, the CU is responsible for processing non-real-time protocols and services, and implementing the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers. The DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, the media access control (MAC) layer, and the physical (PHY) layer. The AAU implements some physical layer processing functions, radio frequency processing, and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, therefore, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU, or, sent by the DU+AAU. It can be understood that the network device can be a device including one or more of a CU node, a DU node, and an AAU node. In addition, the CU may be divided into a network device in an access network (radio access network, RAN), or the CU may be divided into a network device in a core network (core network, CN), and this application does not limit this.

[0095] In addition, in an embodiment of the present application, the network device provides services for the cell, and the terminal device communicates with the cell through the transmission resources (for example, frequency domain resources, or spectrum resources) allocated by the network device. The cell may belong to a macro base station (for example, a macro eNB or a macro gNB, etc.), or may belong to a base station corresponding to a small cell. The small cell here may include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0096] In addition, in an embodiment of the present application, the network device may include a base station (gNB), such as a macro base station, a micro base station, an indoor hotspot, and a relay node, etc., whose function is to send radio waves to the terminal device to realize downlink data transmission on the one hand, and to send scheduling information to control uplink transmission on the other hand, and to receive the radio waves sent by the terminal device and receive uplink data transmission.

[0097] In order to better understand the embodiments of the present application, the concepts involved in the embodiments of the present application are first introduced below.

[0098] 1. Synchronization signal block (SSB), including primary / secondary synchronization signals and physical broadcast channel (PBCH), provides UE with cell downlink synchronization and basic configuration information of the cell. PBCH carries the master information block (MIB) of the cell, which indicates whether system information block type 1 (SIB1) exists and the location of SIB1. SSB occupies 4 symbols in the time domain and 20 PRBs in the frequency domain. SSB can be divided into cell-defined SSB and non-cell-defined SSB. Cell-defined SSB means that this SSB defines a cell, which is specifically manifested as MIB indicating the existence of SIB1, while non-cell-defined SSB means that this SSB does not define a cell. In non-cell-defined SSB, MIB indicates that there is no SIB1, and the bit originally used to indicate the location of SIB1 may be used to indicate the location of the next cell-defined SSB. SSBs appear in a certain pattern in the frequency domain, that is, an SSB may appear at a certain interval. When the UE is turned on, it can search for cells according to this interval. If an SSB is found to be a cell-defined SSB, it can be considered that this is a cell that can be stationed.

[0099] 2. Bandwidth part (Bandwidth part or carrier bandwidth part, BWP): In the physical layer of the fifth generation wireless access system standard NR, the unit of downlink frequency domain resources is resource block (RB). With the increase of mobile users and the emergence of large-capacity services (such as high-definition video services, etc.), an important aspect of the evolution of mobile communications to future 5G systems or NR systems is to support large bandwidth. The larger the bandwidth, the more bandwidth resources are used for data transmission, and the larger the amount of business that can be supported. In a communication system with a large carrier bandwidth, considering the cost of the UE and the amount of business of the UE, the bandwidth supported by the UE may be less than the carrier bandwidth. Among them, the larger the bandwidth supported by the UE, the stronger the processing capability of the UE, the higher the data transmission rate of the UE may be, and the higher the design cost of the UE may be. For example, in a 5G system, the maximum carrier bandwidth may be 400 megahertz (MHz), and the RF bandwidth capability of the UE may be 20MHz, 50MHz or 100MHz, etc. In a wireless communication system, the RF bandwidth capabilities of different UEs may be the same or different.

[0100] In a communication system with a large carrier bandwidth, since the UE's radio bandwidth capability is smaller than the carrier bandwidth, the concept of bandwidth part is proposed, that is, a BWP includes several consecutive RBs in the frequency domain. The terminal device transmits on its own BWP, which can be a set of continuous frequency domain resources on the carrier. The frequency domain resources occupied by different BWPs can be partially overlapped or non-overlapping. Part of the spectrum is allocated to the UE on a broadband to adapt to the bandwidth that the UE can support, and by configuring a variety of BWPs with different bandwidths for the UE, flexible scheduling of the UE and energy saving of the UE can be achieved.

[0101] Initial BWP: The bandwidth of the location of SIB1 indicated by the MIB broadcast in the cell-defined SSB is defined as Initial BWP. On Initial BWP, the UE can obtain SIB1 and other system information (OSI) and monitor paging. In the current protocol, the bandwidth of Initial BWP can be configured as 5M, 10M or 20M.

[0102] Activate (Active) BWP: When the UE has a service, the base station will schedule it from the Initial BWP to a BWP with a bandwidth that matches its service. This BWP is called the Active BWP. According to the current standard, the Active BWP is configured with Type0A and Type2 physical downlink control channel (PDCCH) common search space (CSS), which means that the UE can receive paging and OSI on the current Active BWP.

[0103] 3. MIB contains the following parameters:

[0104] -SystemFrameNumber, 6 bits, indicating the high 6 bits of the frame number of the current frame;

[0105] -SubCarrierSpacingCommon, 1 bit, indicating the subcarrier spacing of Initial BWP;

[0106] -Ssb-SubcarrierOffset, 3 bits. When a special value is used, it means that the MIB has no corresponding SIB1, that is, this SSB is non-cell-defined;

[0107] -Dmrs-TypeA-Position, 1 bit, indicating the type of demodulation reference signal (DMRS);

[0108] -pdcch-ConfigSIB1, 8 bits, indicates the location of SIB1 (Initial BWP). If SSB is non-cell-defined, it can indicate the location of CD-SSB.

[0109] -cellBarred, 1 bit, indicating whether the current cell is barred;

[0110] - intraFreqReselection, 1 bit, indicating whether the UE is allowed to reselect to other cells on the current frequency if the current cell is barred;

[0111] 4. Cell barring is a way for the network to control the load. When the network load is heavy, the network can control the UE not to stay in a certain cell. The parameters include two: cellBarred and intraFreqReselection. After the UE reads the MIB of a certain cell, if it finds that the cell is barred through cellBarred, the UE cannot stay in the current cell. If intraFreqReselection is set to NotAllowed, it means that the UE cannot reselect to other cells on this frequency. If intraFreqReselection is set to Allowed, it means that the UE can reselect to other cells on this frequency.

[0112] 5. Cell reservation is a means for the network to control the purpose of cell use. When the network sets the current cell as a cell reserved for other purposes, the UE cannot stay in the current cell even if the cellBarred of the current cell does not prohibit staying in the current cell.

[0113] Figure 2 and Figure 3 It is a schematic diagram of possible deployment methods of synchronization signal blocks SSB and initial bandwidth parts Initial BWP in a lightweight NR system applicable to an embodiment of the present application.

[0114] A lightweight NR system refers to an NR system designed for terminal devices with low hardware capabilities. The lightweight NR system can ensure that terminal devices with low hardware capabilities can work normally. The lightweight NR system can also be implemented by enabling the existing NR system to serve terminal devices with low hardware capabilities. That is, it can be independent of the existing NR system or it can enhance the existing NR system.

[0115] A lightweight NR cell is a cell that provides services for terminal devices with low hardware capabilities.

[0116] for Figure 2 In the scenario shown, a cell-defined-SSB maps only one Initial BWP, which defines either a normal NR cell or a lightweight NR cell. A normal NR cell can also be called a legacy NR cell or a NR cell, and a lightweight NR cell can also be called an NR-light cell. This application does not limit the name of the cell type. The difference between the two is that the related configurations are different. Generally speaking, the bandwidth of the Initial BWP of the NR-light cell is narrower than that of the NR cell.

[0117] The bandwidth of the Initial BWP of the NR-light cell is relatively narrow, and the terminal devices that can only reside in the NR-light cell can be called lightweight NR terminal devices or NR-light terminal devices; while the bandwidth of the Initial BWP of the NR cell is relatively wide, and the terminal devices that can reside in the NR cell are called legacy NR terminal devices or NR terminal devices. The bandwidth of the NR terminal device is greater than the bandwidth of the NR-light terminal device. The names of the above terminal devices are merely exemplary, and this application does not limit the names of the terminal devices.

[0118] It should be understood that since the bandwidth of NR terminal devices is greater than the bandwidth of NR-light terminal devices, legacy NR terminal devices can choose to reside in NR cells in addition to NR cells.

[0119] exist Figure 2 In the scenario shown, SSB1 maps the initial BWP that can be used by NR terminal devices, that is, an NR cell is defined, and SSB2 maps the initial BWP that can be used by NR-light terminal devices, that is, an NR-light cell is defined.

[0120] for Figure 3 In the scenario shown, the SSB maps two Initial BWPs, one of which is the initial BWP that can be used by NR terminal devices, and the other is the initial BWP that can be used by NR-light terminal devices. That is, the SSB defines a cell with both NR and NR-light, which can support two types of terminal devices.

[0121] In the current cell search process, the terminal device searches for cell-defined-SSB in the frequency domain according to a certain step size. If an SSB is a non-cell-defined-SSB, its MIB only indicates the location of the next cell-defined-SSB, and does not consider whether the cell defined by the next cell-defined-SSB is suitable for the terminal device to reside. This may increase the time it takes for the terminal device to search for a suitable cell and increase power consumption.

[0122] In view of this, the embodiments of the present application optimize the cell search mechanism of the terminal device so that the NR-light terminal device can effectively find a suitable cell to reside in, save search time, and reduce the power consumption of the terminal device.

[0123] The various embodiments provided in the present application will be described in detail below with reference to the accompanying drawings.

[0124] Figure 4 It is a schematic interaction diagram of a cell initial access method provided in an embodiment of the present application. Figure 4 The terminal device in can be Figure 1 In the terminal device 120 or 130, the network device may be Figure 1 The network device 110 in.

[0125] S410, the terminal device receives the first SSB sent by the network device.

[0126] Correspondingly, the network device sends the first SSB to the terminal device at the position of the first SSB.

[0127] Optionally, the first SSB is the SSB that the terminal device searches for in the frequency domain according to a preset step size after being powered on.

[0128] The first SSB may be a non-cell-defined-SSB, which includes first indication information and second indication information. The second indication information is used to indicate the position of the next cell-defined-SSB of the first synchronization signal block, that is, the position of the second synchronization signal block, and the first indication information is used to indicate the cell type of the first cell defined by the second synchronization signal block.

[0129] Optionally, the terminal device may obtain the first indication information and the second indication information from the PBCH of the first SSB. According to a possible implementation, the terminal device may obtain the first indication information and the second indication information from the MIB in the PBCH of the first SSB.

[0130] Optionally, the cell type of the first cell includes: a cell supporting the first type of terminal device to reside, a cell supporting the second type of terminal device to reside, or a cell supporting the first type of terminal device and the second type of terminal device to reside at the same time. For example, the following takes the example that the cell supporting the first type of terminal device to reside includes a legacy NR cell, the cell supporting the second type of terminal device to reside includes an NR-light cell, and the cell supporting the first type of terminal device and the second type of terminal device to reside at the same time includes a cell with both NR and NR-light, and vice versa.

[0131] The hardware capabilities of the above-mentioned first type of terminal device and the second type of terminal device are different, specifically, they may include different supported bandwidths, different numbers of antennas, different maximum modulation orders supported, different maximum subcarrier spacing supported, different signal processing capabilities, etc. The following is an explanation of the case where the hardware capability of the first type of terminal device is greater than that of the second terminal device, and vice versa. For example, the first type of terminal device includes a legacy NR terminal device, and the second type of terminal includes an NR-light terminal device, and the bandwidth of the legacy NR terminal device is greater than the bandwidth of the NR-light terminal device.

[0132] Optionally, because the first synchronization signal block non-cell-defined-SSB does not define a cell, the first indication information can indicate the cell type of the cell defined by the second synchronization signal block cell-defined SSB by redefining two bits of the cell barring parameter in the first synchronization signal block (i.e., two bits of cellBarred and intraFreqReselection) or one bit of SubCarrierSpacingCommon. Specifically, any one or more of the above three bits can be used to indicate the cell type of the cell defined by the cell-defined SSB. The specific method of reinterpreting these three bits is not limited by this application.

[0133] S420: The terminal device determines whether to search for the second synchronization signal block at the location of the second synchronization signal block according to the type of the terminal device and the first indication information.

[0134] If the terminal device is a second type of terminal device, such as an NR-light terminal device, and the first cell is a cell that supports the second type of terminal device, such as an NR-light cell, it means that the type of the terminal device matches the type of the first cell, that is, the terminal device can reside in the first cell, then the terminal device searches for the second synchronization signal block at the location of the second synchronization signal block. If the first cell is a cell that supports the first type of terminal device, such as an NR cell, the terminal device also searches for the next SSB according to the previously preset step size.

[0135] If the terminal device is a first type of terminal device, such as a legacy NR terminal device, and the first cell is a cell that supports the first type of terminal device, such as an NR cell, it means that the type of the terminal device matches the type of the first cell, that is, the terminal device can reside in the first cell, then the terminal device searches for the second synchronization signal block at the location of the second synchronization signal block. If the first cell is a cell that supports the second type of terminal device, such as an NR-light cell, the terminal device also searches for the next SSB according to the step size specified in the previous protocol.

[0136] Optionally, because the first type of terminal device (for example, legacy NR terminal device) can also reside in a cell that supports the second type of terminal device (for example, NR-light cell), the legacy NR terminal device can also directly go to the location of the second synchronization signal block to search for the second synchronization information block, regardless of whether the cell defined by the second synchronization information block is an NR cell.

[0137] The above technical solution enables the NR-light terminal device to quickly determine whether the cell is suitable for its residence by indicating the type of the next cell-defined-SSB defined in the non-cell-defined-SSB, thereby reducing the NR-light cell search time and saving the power consumption of the terminal device.

[0138] After the terminal device successfully resides in a cell, it will continuously monitor the signal quality of neighboring cells and the current cell in idle mode to perform cell reselection, thereby selecting the best cell to provide service signals for the terminal device.

[0139] To facilitate understanding, we first briefly introduce cell selection / reselection.

[0140] 1. Community selection

[0141] When the terminal device is turned on or a wireless link failure occurs, the terminal device will perform a cell search process and select a suitable cell to reside in as quickly as possible. This process is called "cell selection."

[0142] An example of a possible cell selection process is as follows:

[0143] During the cell search process, the terminal device reads the system information of the cell and obtains parameters such as Qrxlevmeas, Qrxlevmin, and Qrxlevminoffset. The terminal device evaluates whether the cell is a suitable cell according to the S criterion. Once a suitable cell is found, that is, a cell that meets the S criterion, the cell selection process is completed. If the cell is not a suitable cell, the terminal device continues to search until it finds a suitable cell and resides in it.

[0144] S criterion formula: Srxlev>0, that is, if the S value of a cell is greater than 0, it means that the cell is a suitable cell, that is, a cell suitable for residence. The calculation formula of Srxlev is:

[0145] Srxlev=Qrxlevmeas-(Qrxlevmin-Qrxlevminoffset)-Pcompensation

[0146] in:

[0147] Srxlev: calculated cell selection reception level value;

[0148] Qrxlevmeas: The received signal strength value measured by the terminal device, which is the measured reference signal receiving power (RSRP);

[0149] Qrxlevmin: the minimum received signal strength value required by the cell;

[0150] Pcompensation: the larger value of (PEMAX–PUMAX) or 0, where PEMAX is the maximum allowable transmit power set by the system when the terminal device accesses the cell; PUMAX refers to the maximum output power specified according to the terminal device level.

[0151] Qrxlevminoffset: This parameter is valid only when the terminal device normally resides in a virtual private mobile network (VPMN) and periodically searches for a high-priority public land mobile network (PLMN) for cell selection evaluation. This parameter offsets Qrxlevmin.

[0152] It should be noted that due to the evolution of communication protocol versions, the S criterion formula and the calculation formula of Srxlev may change for some reasons. The formula given here is only an example and does not limit the formula itself. The embodiment of the present application does not limit the parameters and criteria for cell selection.

[0153] 2. Cell reselection measurement criteria

[0154] After a terminal device resides in a cell, as the terminal device moves, it may need to switch to another cell with higher priority or better signal. This is the cell reselection process. Cell selection is the process of finding a suitable cell as quickly as possible, and cell reselection is the process of selecting a more suitable cell. In order to save power for terminal devices, the protocol stipulates the cell reselection measurement criteria:

[0155] The terminal device always measures the frequency layer or system with a higher priority than the cell it is staying in.

[0156] If Srxlev<=Sintrasearch of the resident cell, the terminal device starts measuring the same-frequency / same-priority cell, where Sintrasearch is the same-frequency measurement start threshold;

[0157] If Srxlev of the resident cell <= Snonintrasearch or Snonintrasearch is not configured, the terminal device initiates measurements on low-priority frequencies and systems, where Snonintrasearch is the threshold for initiating inter-frequency / inter-system measurements;

[0158] 3. Cell reselection criteria

[0159] After the measurement, the terminal device determines whether to perform cell reselection to a new cell. The reselection criteria are as follows:

[0160] Reselection criteria for high-priority frequencies or systems: The terminal device has resided in the original cell for more than 1 second, and at the same time, Srxlev of the target frequency cell > Threshx-high and lasts for a certain period of time, where Threshx-high is the threshold for reselection from the current serving carrier frequency to a higher-priority frequency;

[0161] Reselection criteria for low-priority frequencies or systems: The terminal device has resided in the original cell for more than 1 second and no cell of high-priority (or equal-priority) frequencies meets the reselection requirement conditions. At the same time, Srxlev of the resident cell < Threshserving-low and lasts for a certain period of time, where Threshx-low is the threshold for reselection from the current serving carrier frequency to a lower-priority frequency;

[0162] Reselection criteria for equal-priority frequencies or systems: The terminal device has resided in the original cell for more than 1 second and no cell of high-priority frequencies meets the reselection requirement conditions. At the same time, the cell reselection to a cell of equal-priority frequencies is based on the ranking standard for intra-frequency cell reselection. The intra-frequency cell reselection ranking standard is defined as follows. Rs is the ranking value of the current resident cell, and Rn is the ranking value of the neighboring cell:

[0163] Rs = Qmeas_s + Qhyst – Qoffset_temp, Rn = Qmeas_s – Qoffset – Qoffset_temp

[0164] Where:

[0165] Qhyst: Hysteresis value, used to prevent ping-pong reselection;

[0166] Qmeas_s: The received signal strength value of the resident cell measured by the terminal device;

[0167] Qoffset: For the same frequency, when Qoffsets_n is valid, the value is Qoffsets_n, otherwise it is 0; for different frequencies, when Qoffsets_n is valid, the value is Qoffsets_n+Qoffsetfrequency, otherwise it is Qoffsetfrequency;

[0168] Qoffset_temp: may represent an offset, which may be, for example, an offset broadcast by the network and added to a cell when a terminal device fails to establish an RRC connection in a cell.

[0169] The terminal device will sort the ranking values ​​of all cells that meet the cell selection S criteria. When reselecting, it does not simply reselect the cell with the best ranking, but finds the highest ranking value during the sorting. Cells with a certain difference (such as xdB, where x is configurable) are considered to be similar cells. The cell with the highest final ranking value is also called the target cell.

[0170] Generally, the system message of the current cell will broadcast the required configuration parameters of the current cell and neighboring cells, so that the terminal device can calculate parameters such as Rs and Rn. Qmeas is the received signal strength value of the cell measured by the terminal device. At most N beams of each cell with signal strength higher than the threshold can be used to generate cell quality, which is filtered by layer 3 as Qmeas. The threshold and N are notified to the terminal device in the broadcast message, and N is an integer greater than or equal to 1. A beam higher than the threshold is considered a good beam.

[0171] It should be noted that due to the evolution of communication protocol versions, the calculation formulas of Rs and Rn may change for some reasons, and the formulas given here are only examples and do not limit the formulas themselves. The embodiments of the present application do not limit the parameters and criteria for cell reselection.

[0172] As mentioned above, according to the above-mentioned cell reselection mechanism, the target cell is determined only based on the signal quality of the cell, without considering that the NR-light terminal device may not have large bandwidth capabilities, which may cause the terminal device to not support the Initial BWP bandwidth of the target cell, and thus fail to reselect the target cell, which may cause a waste of resources and increase the power consumption of the terminal device.

[0173] In view of this, the embodiment of the present application optimizes the reselection mechanism of the NR-light cell, so that the NR-light terminal device avoids measuring or reselecting a cell that is not supported by the bandwidth, saves signaling overhead, and reduces the power consumption of the terminal device.

[0174] Figure 5 It is a schematic interactive diagram of a cell reselection method provided in an embodiment of the present application. Figure 5 The terminal device in can be Figure 1 In the terminal device 120 or 130, the network device may be Figure 1 The network device 110 in.

[0175] S510, the terminal device receives first indication information sent by the network device.

[0176] Correspondingly, the network device sends the first indication information to the terminal device.

[0177] After the terminal device resides in the second cell, it continuously receives system information related to the reselection of the second cell sent by the network device, where the system information includes first indication information, and the first indication information is used to indicate information about the Initial BWP bandwidth of the first cell, where the first cell is a neighboring cell of the second cell. For example, the information about the Initial BWP bandwidth of the first cell includes the width of the Initial BWP bandwidth of the first cell and / or the type of the Initial BWP bandwidth of the first cell.

[0178] As an example but not limitation, the first indication information includes a parameter Per frequency / cell, where Perfrequency / cell is used to indicate information about the Initial BWP bandwidth of the first cell.

[0179] Optionally, the first indication information is used to indicate the width of the Initial BWP bandwidth of the first cell, where the width of the Initial BWP bandwidth is the width of CORESET#0 in the MIB, and the configuration of CORESET#0 is indicated by the parameter pdcch-ConfigSIB1 in the MIB.

[0180] Optionally, if all neighboring cells of the second cell support multiple widths of Initial BWP bandwidth, the system information related to the reselection of the second cell may indicate the widths of multiple other Initial BWP bandwidths in addition to the width of the Initial BWP bandwidth of the first cell. In order to save the overhead of system information, a common Initial BWP bandwidth width may be broadcast, and then the width of the cell bandwidth different from the common bandwidth may be broadcast.

[0181] Optionally, the first indication information can also be used to indicate the type of the Initial BWP bandwidth of the first cell, for example: the Initial BWP bandwidth type includes: the Initial BWP bandwidth supporting the first type of terminal equipment to reside, the Initial BWP bandwidth supporting the second type of terminal equipment to reside, and the Initial BWP bandwidth supporting both the first type of terminal equipment and the second type of terminal equipment to reside. For example, the Initial BWP bandwidth supporting the first type of terminal equipment to reside includes the Initial BWP bandwidth of the legacy NR cell, the Initial BWP bandwidth supporting the second type of terminal equipment to reside includes the Initial BWP bandwidth of the NR-light cell, and the Initial BWP bandwidth supporting the first type of terminal equipment and the second type of terminal equipment to reside simultaneously includes the Initial BWP bandwidth of the cell with both NR and NR-light.

[0182] The above-mentioned first type of terminal device and second type of terminal device may be terminal devices with different hardware capabilities. Specifically, they may include different supported bandwidths, different numbers of antennas, different maximum modulation orders supported, different maximum subcarrier spacing supported, different signal processing capabilities, etc. Take the example that the hardware capability of the first type of terminal device is greater than that of the second terminal device, and vice versa. For example, the first type of terminal device includes legacy NR terminal devices, and the second type of terminal includes NR-light terminal devices, and the bandwidth of the NR terminal device is greater than the bandwidth of the NR-light terminal device.

[0183] Optionally, if all neighboring cells of the second cell support multiple types of Initial BWP bandwidths, the system message related to the reselection of the second cell may indicate multiple other bandwidth types in addition to the Initial BWP bandwidth type of the first cell. In order to save the overhead of system information, only the type of Initial BWP bandwidth of the cell supporting the second type of terminal equipment may be indicated, for example, only the Initial BWP bandwidth of the NR-light cell may be indicated.

[0184] Optionally, the first indication information may also be used to indicate the InitialBWP bandwidth re-indicated in the SIB1 of the first cell.

[0185] Optionally, the first indication information may further include: carrier width configuration of the first cell and frequency band information of the first cell. For example, the carrier width configuration may include the carrier starting position and bandwidth of the first cell under different subcarrier spacings.

[0186] S520: The terminal device determines whether to reselect to the first cell according to the type of the terminal device and the first indication information.

[0187] As described above, before the terminal device performs cell reselection, the terminal device first determines which cells in the neighboring cells of the second cell need to be measured according to the cell reselection measurement criteria.

[0188] Optionally, if the first cell meets the reselection measurement criteria, the terminal device will decide whether to measure the first cell according to the type of the terminal device and the initial BWP bandwidth information of the first cell indicated by the first indication information.

[0189] If the type of terminal equipment supports the Initial BWP bandwidth of the first cell, the first cell is measured; if the type of terminal equipment does not support the Initial BWP bandwidth of the first cell, the first cell is not measured, so that the first cell will not eventually become the target cell for cell reselection.

[0190] It should be understood that when the first indication information includes the carrier width configuration of the first cell and / or the frequency band information of the first cell, it is also necessary to determine whether the terminal device supports the carrier width of the first cell and / or the frequency band information of the first cell. Only if the terminal device supports all the information about the first cell in the first indication information, the terminal device will measure the first cell. Otherwise, the first cell will not be measured.

[0191] As described above, before the terminal device performs cell reselection, the terminal device determines the target cell for the terminal device to reselect based on the existing cell reselection criteria.

[0192] Optionally, if the first cell is the target cell of the terminal device, the terminal device determines whether to support the InitialBWP bandwidth of the target cell according to the type of the terminal device and the Initial BWP bandwidth information of the first cell indicated by the first indication information.

[0193] If the type of the terminal device supports the Initial BWP bandwidth of the first cell, the first cell is reselected; if the type of the terminal device does not support the Initial BWP bandwidth of the first cell, the first cell is not measured.

[0194] It should be understood that when the first indication information includes the carrier width configuration of the first cell and / or the frequency band information of the first cell, it is also necessary to determine whether the terminal device supports the carrier width of the first cell and / or the frequency band information of the first cell. Only if the terminal device supports all the information about the first cell in the first indication information, the terminal device will reselect the first cell. Otherwise, it will not reselect the first cell.

[0195] In the above scheme, by carrying the Initial BWP bandwidth information of the neighboring cell in the first indication information, the NR-light terminal device avoids measuring or reselecting a cell whose bandwidth is not supported by itself, thereby reducing the power consumption of the terminal device.

[0196] As mentioned above, the MIB contains the cell barring parameter, but currently there is only one set of cell barring parameters in the MIB, which only applies to Figure 2 The scenario shown, but for Figure 3 In the scenario shown, the cell defined by cell-defined-SSB supports both NR cells and NR-light cells. The current cell barring parameters cannot indicate the barring function of both cell accesses at the same time.

[0197] In view of this, the present application proposes a method for Figure 3 The scenario shown provides more flexibility in configuring cellbarring parameters.

[0198] Figure 6 It is a schematic interaction diagram of another cell initial access method provided in an embodiment of the present application.

[0199] S610, the terminal device receives the third indication information sent by the network device. Figure 6 The terminal device in can be Figure 1 In the terminal device 120 or 130, the network device may be Figure 1 The network device 110 in.

[0200] Correspondingly, the network device sends a third indication message to the terminal device.

[0201] Optionally, the terminal device may obtain the third indication information from the MIB of the first cell sent by the network device.

[0202] The third indication information includes a first prohibition parameter and a second prohibition parameter, the first prohibition parameter is used for a first type of terminal device to perform initial access to the first cell, and the second prohibition parameter is used for a second type of terminal device to perform initial access to the first cell.

[0203] The above-mentioned first type of terminal device and second type of terminal device are terminal devices with different hardware capabilities, specifically, they may include different supported bandwidths, different numbers of antennas, different supported maximum modulation orders, different supported maximum subcarrier spacings, different signal processing capabilities, etc. The following is an example of the hardware capability of the first type of terminal device being greater than that of the second terminal device, and vice versa. For example, the first type of terminal device includes legacy NR terminal devices, and the second type of terminal includes NR-light terminal devices, and the bandwidth of the NR terminal device is greater than the bandwidth of the NR-light terminal device.

[0204] The first prohibition parameter and the second prohibition parameter include a set of cell barring parameters respectively. Cell barring is a way for the network to control the load. When the network load is heavy, the network can control the terminal device not to reside in a certain cell. Cell barring includes two parameters: cellBarred and intraFreqReselection. After the terminal device reads the MIB of a certain cell, if it is found through cellBarred that the cell is prohibited, the terminal device cannot reside in the current cell. If intraFreqReselection is set to not allowed (NotAllowed), it means that the terminal device cannot reselect to other cells on this frequency. If intraFreqReselection is set to allowed (Allowed), it means that the terminal device can reselect to other cells on this frequency.

[0205] Optionally, the third indication information includes first reservation indication information or second reservation indication information or third reservation indication information. The first reservation indication information is used to indicate whether the first cell is a cell reserved by the network operator for other purposes. If the first reservation indication information is true, it indicates that the terminal device cannot reside in the first cell; the second reservation indication information indicates that the first cell is a cell reservation indication set for a first type of terminal device. If the second reservation indication information is true, it indicates that the first type of terminal device cannot reside in the first cell; the third reservation indication information indicates that the first cell is a cell reservation indication set for a second type of terminal device. If the third reservation indication information is true, it indicates that the second type of terminal device cannot reside in the first cell.

[0206] Optionally, the third indication information may be indicated by a cell-defined-SSB indicating the location of the first cell.

[0207] Optionally, the third indication message may be indicated by SIB1 of the first cell.

[0208] Optionally, the third indication information may be indicated by other SIBs of the first cell.

[0209] S620: The terminal device determines to use the first prohibited parameter or the second prohibited parameter according to the terminal device type and the third indication information.

[0210] The terminal device decides to use the first prohibition parameter or the second prohibition parameter in the third indication information according to whether it is a first type of terminal device or a second type of terminal device.

[0211] If the terminal device is a first type of terminal device, use the first prohibition parameter to determine whether it can reside in the first cell or a cell with the same frequency as the first cell;

[0212] If the terminal device is a terminal device of the second type, the second prohibition parameter is used to determine whether it can reside in the first cell or a cell with the same frequency as the first cell.

[0213] By adding an additional set of cell barring parameters, the first type of terminal device or the second type of terminal device can flexibly select the corresponding cell barring parameter according to its own terminal device type, and further determine whether it can reside in the cell or other cells with the same frequency as the cell according to the selected cell barring parameter.

[0214] The various embodiments described herein may be independent solutions or may be combined according to internal logic, and all of these solutions fall within the protection scope of this application.

[0215] It can be understood that the methods and operations implemented by the terminal device in the above-mentioned method embodiments can also be implemented by components (such as chips or circuits) that can be used for terminal devices, and the methods and operations implemented by the network device in the above-mentioned method embodiments can also be implemented by components (such as chips or circuits) that can be used for network devices.

[0216] The above describes the method embodiment provided by the present application, and the following describes the device embodiment provided by the present application. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment, so the content not described in detail can be referred to the method embodiment above, and for the sake of brevity, it will not be repeated here.

[0217] The above mainly describes the solution provided by the embodiment of the present application from the perspective of the interaction between various network elements. It is understandable that each network element, such as a transmitting end device or a receiving end device, includes a hardware structure and / or software module corresponding to the execution of each function in order to realize the above functions. Those skilled in the art should be aware that, in combination with the units and algorithm steps of each example described in the embodiments disclosed in this document, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of protection of this application.

[0218] The embodiment of the present application can divide the functional modules of the transmitting end device or the receiving end device according to the above method example. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other feasible division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

[0219] Figure 7 7 is a schematic block diagram of a communication device provided in an embodiment of the present application. The communication device 700 includes a transceiver unit 710 and a processing unit 720. The transceiver unit 710 can communicate with the outside, and the processing unit 720 is used for data processing. The transceiver unit 710 can also be called a communication interface or a communication unit.

[0220] Optionally, the communication device 700 may further include a storage unit, which may be used to store instructions and / or data, and the processing unit 720 may read the instructions and / or data in the storage unit.

[0221] The communication device 700 can be used to execute the actions performed by the terminal device in the above method embodiment. In this case, the communication device 700 can be a terminal device or a component that can be configured in the terminal device. The transceiver unit 710 is used to execute the transceiver-related operations on the terminal device side in the above method embodiment, and the processing unit 720 is used to execute the processing-related operations on the terminal device side in the above method embodiment.

[0222] Alternatively, the communication device 700 can be used to execute the actions performed by the network device in the above method embodiment. In this case, the communication device 700 can be a network device or a component that can be configured on the network device, the transceiver unit 710 is used to execute the transceiver related operations on the network device side in the above method embodiment, and the processing unit 720 is used to execute the processing related operations on the network device side in the above method embodiment.

[0223] As a design, when the communication device 700 is a terminal device, it is used to execute the above Figure 4 The actions performed by the terminal device in the illustrated embodiment are as follows: the transceiver unit 710 is used to: receive first indication information sent by a network device, the first indication information being used to indicate information of an initial bandwidth portion of a first cell, wherein the first cell is a neighboring cell of a second cell, and the second cell is a cell in which the terminal device is currently residing; the processing unit 720 is used to: detect that the first cell satisfies a reselection measurement criterion, and determine whether to measure the first cell according to the type of the terminal device and the first indication information.

[0224] Optionally, the processing unit 720 is used to: when it is detected that the first cell meets the reselection measurement criteria, if the type of the terminal device does not support the initial bandwidth part of the first cell, not measure the first cell; if the type of the terminal device supports the initial bandwidth part of the first cell, measure the first cell.

[0225] Optionally, the processing unit 720 is used to: when the first cell is determined to be the target cell, if the type of the terminal device does not support the initial bandwidth part of the first cell, control the terminal device not to reselect to the first cell; if the type of the terminal device supports the initial bandwidth part of the first cell, control the terminal device to reselect from the second cell to the first cell.

[0226] Optionally, the type of the terminal device is a first type terminal device or a second type terminal device, and the bandwidth capabilities of the first type terminal device and the second type terminal device are different.

[0227] Optionally, the information of the initial bandwidth part of the first cell includes one or more of the following information: bandwidth width of the initial bandwidth part of the first cell, and type of the initial bandwidth part of the first cell.

[0228] Optionally, the types of the initial bandwidth part of the first cell include: an initial bandwidth part supporting the first type of terminal device to reside, an initial bandwidth part supporting the second type of terminal device to reside, and an initial bandwidth part supporting both the first type of terminal device and the second type of terminal device to reside.

[0229] As another design, when the communication device 700 is a network device, it is used to execute the above Figure 4 The actions performed by the network device in the illustrated embodiment are that the transceiver unit 710 is used to: send first indication information to the terminal device, where the first indication information is used to indicate information of an initial bandwidth portion of a first cell, wherein the first cell is a neighboring cell of a second cell, and the second cell is the cell where the terminal device is currently residing.

[0230] Optionally, the information of the initial bandwidth part of the first cell includes one or more of the following information: bandwidth width of the initial bandwidth part of the first cell, and type of the initial bandwidth part of the first cell.

[0231] Optionally, the types of the initial bandwidth part of the first cell include: an initial bandwidth part supporting the residence of a first type of terminal device, an initial bandwidth part supporting the residence of a second type of terminal device, and an initial bandwidth part supporting the residence of both the first type of terminal device and the second type of terminal device, wherein the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0232] As another design, when the communication device 700 is a terminal device, it is used to execute the above Figure 5 The actions performed by the terminal device in the illustrated embodiment are as follows: the transceiver unit 710 is used to: receive a first synchronization signal block from a network device, the first synchronization signal block including first indication information, the first indication information being used to indicate a cell type of a first cell, the first cell being a cell defined by a second synchronization signal block; the first synchronization signal block including second indication information, the second indication information being used to indicate a position of the second synchronization signal block; wherein the first synchronization signal block is a synchronization signal block for an undefined cell, and the second synchronization signal block is a synchronization signal block for a defined cell; the processing unit 720 is used to: determine whether to search for the second synchronization signal block at the position of the second synchronization signal block according to the type of the terminal device and the cell type of the first cell.

[0233] Optionally, the type of the terminal device is a first type terminal device or a second type terminal device, and the bandwidth capabilities of the first type terminal device and the second type terminal device are different.

[0234] Optionally, the cell type includes: a cell supporting the first type of terminal equipment to reside, a cell supporting the second type of terminal equipment to reside, and a cell supporting both the first type of terminal equipment and the second type of terminal equipment to reside.

[0235] Optionally, the processing unit 720 is used to: search for a synchronization signal block in the frequency domain according to a preset step size, where the synchronization signal block is the first synchronization signal block.

[0236] As another design, when the communication device 700 is a network device, it is used to execute the above Figure 5The actions performed by the network device in the illustrated embodiment are as follows: the transceiver unit 710 is used to: send a first synchronization signal block to a terminal device, the first synchronization signal block including first indication information, the first indication information being used to indicate a cell type of a first cell, the first cell being a cell defined by a second synchronization signal block; the first synchronization signal block including second indication information, the second indication information being used to indicate a location of the second synchronization signal block; wherein the first synchronization signal block is a synchronization signal block for an undefined cell, and the second synchronization signal block is a synchronization signal block for a defined cell.

[0237] Optionally, the cell types include: a cell supporting a first type of terminal device, a cell supporting a second type of terminal device, and a cell supporting both the first type of terminal device and the second type of terminal device, wherein the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0238] As another design, when the communication device 700 is a terminal device, it is used to execute the above Figure 6 The actions performed by the terminal device in the illustrated embodiment are as follows: the transceiver unit 710 is used to: receive a third indication message sent by a network device, the third indication message including a first prohibited parameter and a second prohibited parameter, wherein the first prohibited parameter is used for a first type of terminal device to perform initial access to a first cell, and the second prohibited parameter is used for a second type of terminal device to perform initial access to the first cell, and the first type of terminal device and the second type of terminal device have different bandwidth capabilities; the processing unit 720 is used to determine, according to the type of the terminal device, to use the first prohibited parameter or the second prohibited parameter.

[0239] As another design, when the communication device 700 is a network device, it is used to execute the above Figure 6 The actions performed by the network device in the illustrated embodiment, the transceiver unit 710 is used to: send a third indication message to the terminal device, the third indication message including a first prohibition parameter and a second prohibition parameter, wherein the first prohibition parameter is used for a first type of terminal device to perform initial access to a first cell, and the second prohibition parameter is used for a second type of terminal device to perform initial access to the first cell, wherein the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0240] Figure 7 The processing unit 720 in the embodiment may be implemented by a processor or a processor-related circuit. The transceiver unit 710 may be implemented by a transceiver or a transceiver-related circuit. The transceiver unit 710 may also be referred to as a communication unit or a communication interface. The storage unit may be implemented by a memory.

[0241] like Figure 8As shown, the embodiment of the present application further provides a communication device 800. The communication device 800 includes a processor 810, the processor 810 is coupled to a memory 820, the memory 820 is used to store computer programs or instructions or and / or data, and the processor 810 is used to execute the computer programs or instructions and / or data stored in the memory 820, so that the method in the above method embodiment is executed.

[0242] Optionally, the communication device 800 includes one or more processors 810.

[0243] Alternatively, if Figure 8 As shown, the communication device 800 may further include a memory 820 .

[0244] Optionally, the communication device 800 may include one or more memories 820 .

[0245] Optionally, the memory 820 may be integrated with the processor 810 or provided separately.

[0246] Alternatively, if Figure 8 As shown, the communication device 800 may further include a transceiver 830, and the transceiver 830 is used for receiving and / or sending signals. For example, the processor 810 is used to control the transceiver 830 to receive and / or send signals.

[0247] As a solution, the communication device 800 is used to implement the operations performed by the terminal device in the above method embodiment.

[0248] For example, the processor 810 is used to implement the processing-related operations performed by the terminal device in the above method embodiment, and the transceiver 830 is used to implement the sending and receiving-related operations performed by the terminal device in the above method embodiment.

[0249] As another solution, the communication device 800 is used to implement the operations performed by the network device in the above method embodiment.

[0250] For example, the processor 810 is used to implement the processing-related operations performed by the network device in the above method embodiment, and the transceiver 830 is used to implement the sending and receiving-related operations performed by the network device in the above method embodiment.

[0251] The present application also provides a communication device 900, which can be a terminal device or a chip. The communication device 900 can be used to perform the operations performed by the terminal device in the above method embodiment. When the communication device 900 is a terminal device, Fig. 9 A simplified schematic diagram of the structure of a terminal device is shown. For ease of understanding and illustration, Fig. 9 In the example, a mobile phone is used as the terminal device. Fig. 9 As shown, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly used to process communication protocols and communication data, as well as to control the terminal device, execute software programs, process software program data, etc. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for conversion between baseband signals and radio frequency signals and processing of radio frequency signals. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input-output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input-output devices.

[0252] When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then sends the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data. For ease of explanation, Fig. 9 Only one memory and processor are shown in the figure. In an actual terminal device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device. The memory may be set independently of the processor or integrated with the processor, and the embodiments of the present application do not limit this.

[0253] In the embodiment of the present application, the antenna and the radio frequency circuit with transceiver functions can be regarded as the transceiver unit of the terminal device, and the processor with processing function can be regarded as the processing unit of the terminal device.

[0254] like Fig. 9 As shown, the terminal device includes a transceiver unit 910 and a processing unit 920. The transceiver unit 910 may also be referred to as a transceiver, a transceiver, a transceiver device, etc. The processing unit 920 may also be referred to as a processor, a processing board, a processing module, a processing device, etc.

[0255] Optionally, the device for implementing the receiving function in the transceiver unit 910 may be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 910 may be regarded as a sending unit, that is, the transceiver unit 910 includes a receiving unit and a sending unit. The transceiver unit may sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit, etc. The receiving unit may sometimes be referred to as a receiver, a receiver, or a receiving circuit, etc. The sending unit may sometimes be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0256] For example, in one implementation, the transceiver unit 910 is used to execute Figures 4 to 6The processing unit 920 is used to perform the receiving operation of the terminal device in Figures 4 to 6 Processing actions on the terminal device side.

[0257] It should be understood that Fig. 9 This is only an example and not a limitation. The terminal device including the transceiver unit and the processing unit may not rely on Fig. 9 The structure shown.

[0258] When the communication device 900 is a chip, the chip includes a transceiver unit and a processing unit, wherein the transceiver unit may be an input / output circuit or a communication interface; and the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip.

[0259] The embodiment of the present application further provides a communication device 1000, which can be a network device or a chip. The communication device 1000 can be used to execute the operations executed by the network device in the above method embodiment.

[0260] When the communication device 1000 is a network device, for example, it is a base station. Fig.10 A simplified schematic diagram of a base station structure is shown. The base station includes a portion 1010 and a portion 1020. The portion 1010 is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals into baseband signals; the portion 1020 is mainly used for baseband processing, controlling the base station, etc. The portion 1010 can generally be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc. The portion 1020 is generally the control center of the base station, and can generally be referred to as a processing unit, which is used to control the base station to perform the processing operations on the network device side in the above method embodiment.

[0261] The transceiver unit of part 1010 may also be referred to as a transceiver or a transceiver, etc., and includes an antenna and a radio frequency circuit, wherein the radio frequency circuit is mainly used for radio frequency processing. Optionally, the device used to implement the receiving function in part 1010 may be regarded as a receiving unit, and the device used to implement the sending function may be regarded as a sending unit, that is, part 1010 includes a receiving unit and a sending unit. The receiving unit may also be referred to as a receiver, a receiver, or a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0262] Part 1020 may include one or more boards, each of which may include one or more processors and one or more memories. The processor is used to read and execute the program in the memory to realize the baseband processing function and the control of the base station. If there are multiple boards, each board can be interconnected to enhance the processing capability. As an optional implementation, multiple boards may share one or more processors, or multiple boards may share one or more memories, or multiple boards may share one or more processors at the same time.

[0263] For example, in one implementation, the transceiver unit of part 1010 is used to execute Figures 4 to 6 In the embodiment shown, the steps related to sending and receiving are performed by the network device; part 1020 is used to perform Figures 4 to 6 The illustrated embodiment relates to processing steps performed by a network device.

[0264] It should be understood that Fig.10 This is only an example and not a limitation. The network device including the transceiver unit and the processing unit may not rely on Fig.10 The structure shown.

[0265] When the communication device 1000 is a chip, the chip includes a transceiver unit and a processing unit, wherein the transceiver unit may be an input / output circuit or a communication interface; and the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip.

[0266] An embodiment of the present application also provides a computer-readable storage medium on which computer instructions for implementing the method executed by a terminal device or a method executed by a network device in the above method embodiment are stored.

[0267] For example, when the computer program is executed by a computer, the computer can implement the method executed by the terminal device or the method executed by the network device in the above method embodiment.

[0268] An embodiment of the present application also provides a computer program product comprising instructions, which, when executed by a computer, enables the computer to implement the method executed by a terminal device or a method executed by a network device in the above method embodiment.

[0269] An embodiment of the present application also provides a communication system, which includes the network device and the terminal device in the above embodiment.

[0270] As an example, the communication system includes: Figures 4 to 6 The network device and the terminal device in the described embodiments.

[0271] The explanation of the relevant contents and beneficial effects in any of the communication devices provided above can refer to the corresponding method embodiments provided above, and will not be repeated here.

[0272] In an embodiment of the present application, a terminal device or a network device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. Among them, the hardware layer may include hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory). The operating system of the operating system layer may be any one or more computer operating systems that implement business processing through processes, such as Linux operating system, Unix operating system, Android operating system, iOS operating system, or Windows operating system. The application layer may include applications such as browsers, address books, word processing software, and instant messaging software.

[0273] The embodiments of the present application do not specifically limit the specific structure of the execution subject of the method provided in the embodiments of the present application, as long as it is possible to communicate according to the method provided in the embodiments of the present application by running a program that records the code of the method provided in the embodiments of the present application. For example, the execution subject of the method provided in the embodiments of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call and execute a program.

[0274] Various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and / or engineering techniques. The term "article of manufacture" as used herein may encompass a computer program accessible from any computer-readable device, carrier, or medium. For example, a computer-readable medium may include, but is not limited to, a magnetic storage device (e.g., a hard disk, a floppy disk, or a magnetic tape, etc.), an optical disk (e.g., a compact disc (CD), a digital versatile disc (DVD), etc.), a smart card, and a flash memory device (e.g., an erasable programmable read-only memory (EPROM), a card, a stick, or a key drive, etc.).

[0275] The various storage media described herein may represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and / or carrying instructions and / or data.

[0276] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0277] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM may include the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0278] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.

[0279] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0280] Those of ordinary skill in the art will appreciate that the units and steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of protection of this application.

[0281] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0282] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0283] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0284] In addition, each functional unit in each embodiment of the present application may be integrated into one unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0285] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. For example, the computer can be a personal computer, a server, or a network device, etc. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media integrations. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)). For example, the aforementioned available medium may include, but is not limited to, various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0286] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A communication method, characterized in that: include: The terminal device receives third indication information, where the third indication information includes a first cell prohibited cell Barred parameter and a second cell Barred parameter, wherein the first cell Barred parameter is used for the first type of terminal device to determine whether it can reside in the first cell, and the second cell Barred parameter is used for the second type of terminal device to determine whether it can reside in the first cell; The terminal device determines to use the first cell Barred parameter or the second cell Barred parameter according to the type of the terminal device, wherein the number of antennas of the first type terminal device and the second type terminal device is different.

2. The method according to claim 1, characterized in that The first type of terminal device and the second type of terminal device satisfy at least one of the following conditions; The supported bandwidths are different, the bandwidth capabilities are different, the supported maximum modulation orders are different, the supported maximum subcarrier spacings are different, or the signal processing capabilities are different.

3. The method according to claim 1 or 2, characterized in that: The third indication information also includes intraFreqReselection, and the intraFreqReselection indicates whether the terminal device is allowed to reselect to other cells with the same frequency as the first cell.

4. The method according to any one of claims 1 to 3, characterized in that: If the terminal device is the first type of terminal device, the terminal device uses the first cell Barred parameter to determine whether it can reside in the first cell.

5. The method according to any one of claims 1 to 4, characterized in that: If the terminal device is the second type of terminal device, the terminal device uses the second cell Barred parameter to determine whether it can reside in the first cell.

6. The method according to any one of claims 1 to 5, characterized in that: The first cell is the current cell.

7. A communication method, characterized in that: include: The network device sends a third indication information, and the third indication information includes a first cell prohibited cell Barred parameter and a second cell Barred parameter, wherein the first cell Barred parameter is used by a first type of terminal device to determine whether it can reside in the first cell, and the second cell Barred parameter is used by a second type of terminal device to determine whether it can reside in the first cell, wherein the first type of terminal device and the second type of terminal device have different numbers of antennas.

8. The method according to claim 7, characterized in that The first type of terminal device and the second type of terminal device satisfy at least one of the following conditions; The supported bandwidths are different, the bandwidth capabilities are different, the supported maximum modulation orders are different, the supported maximum subcarrier spacings are different, or the signal processing capabilities are different.

9. The method according to claim 7 or 8, characterized in that: The third indication information also includes intraFreqReselection, and the intraFreqReselection indicates whether the terminal device is allowed to reselect to other cells with the same frequency as the first cell.

10. The method according to any one of claims 7 to 9, characterized in that: The first cell is the current cell.

11. A terminal device, characterized in that: include: A transceiver unit, configured to receive third indication information sent by a network device, wherein the third indication information includes a first cell prohibited cell Barred parameter and a second cell Barred parameter, wherein the first cell Barred parameter is used for a first type of terminal device to determine whether it can reside in the first cell, and the second cell Barred parameter is used for a second type of terminal device to determine whether it can reside in the first cell; A processing unit, used to determine whether to use the first cell Barred parameter or the second cell Barred parameter according to the type of the terminal device, wherein the number of antennas of the first type of terminal device and the second type of terminal device is different.

12. The terminal device according to claim 11, characterized in that: The first type of terminal device and the second type of terminal device satisfy at least one of the following conditions; The supported bandwidths are different, the bandwidth capabilities are different, the supported maximum modulation orders are different, the supported maximum subcarrier spacings are different, or the signal processing capabilities are different.

13. The terminal device according to claim 11 or 12, characterized in that: The third indication information also includes intraFreqReselection, and the intraFreqReselection indicates whether the terminal device is allowed to reselect to other cells with the same frequency as the first cell.

14. The terminal device according to any one of claims 11 to 13, characterized in that: If the terminal device is the first type of terminal device, the terminal device uses the first cell Barred parameter to determine whether it can reside in the first cell.

15. The terminal device according to any one of claims 11 to 14, characterized in that: If the terminal device is the second type of terminal device, the terminal device uses a second cell Barred parameter to determine whether it can reside in the first cell.

16. The terminal device according to any one of claims 11 to 15, characterized in that: The first cell is the current cell.

17. A network device, characterized in that: include: A transceiver unit is used to send a third indication information, wherein the third indication information includes a first cell prohibited cell Barred parameter and a second cell Barred parameter, wherein the first cell Barred parameter is used by a first type of terminal device to determine whether it can reside in the first cell, and the second cell Barred parameter is used by a second type of terminal device to determine whether it can reside in the first cell, wherein the first type of terminal device and the second type of terminal device have different numbers of antennas.

18. The network device according to claim 17, characterized in that: The first type of terminal device and the second type of terminal device satisfy at least one of the following conditions; The supported bandwidths are different, the bandwidth capabilities are different, the supported maximum modulation orders are different, the supported maximum subcarrier spacings are different, or the signal processing capabilities are different.

19. The network device according to claim 17 or 18, characterized in that: The third indication information also includes intraFreqReselection, and the intraFreqReselection indicates whether the terminal device is allowed to reselect to other cells with the same frequency as the first cell.

20. The network device according to any one of claims 17 to 19, characterized in that: The first cell is the current cell.

21. A communication device, characterized in that: The method comprises a processor, wherein the processor is coupled to a memory, the memory is used to store a computer program or an instruction, and the processor is used to execute the computer program or the instruction in the memory, so that the method according to any one of claims 1 to 6 is executed.

22. A communication device, characterized in that: The method comprises a processor, wherein the processor is coupled to a memory, the memory is used to store a computer program or an instruction, and the processor is used to execute the computer program or the instruction in the memory, so that the method according to any one of claims 7 to 10 is executed.

23. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program or instructions. When a computer reads and executes the computer program or instructions, the method according to any one of claims 1 to 6 is executed.

24. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program or instructions. When a computer reads and executes the computer program or instructions, the method according to any one of claims 7 to 10 is executed.

25. A chip system, characterized in that: include: A processor, configured to call and run a computer program from a memory so that a communication device equipped with the chip system executes the method described in any one of claims 1 to 6 or the method described in any one of claims 7 to 10.

26. A computer program product, comprising instructions, which, when executed by a computer, cause the method according to any one of claims 1 to 6 to be executed, or cause the method according to any one of claims 7 to 10 to be executed.

Images