Cell reselection method, terminal equipment and network equipment

Abstract

The invention provides a cell reselection method, terminal equipment and network equipment. The terminal equipment is prevented from reselecting a cell which does not support the bandwidth of the terminal equipment, and the terminal equipment can be low-bandwidth terminal equipment, so that the cell reselection time of the terminal equipment is reduced, and meanwhile, the power consumption of the terminal equipment is reduced. The method comprises: a terminal device receiving first indication information sent by a network device, the first indication information being used for indicating information of an initial bandwidth portion of a first cell, the first cell being a neighbor cell of a second cell, the second cell being a cell in which the terminal device currently resides; and 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

[0001] This application is a divisional application. The application number of the original application is 201980103168.6, the filing date of the original application is December 25, 2019, and the entire content of the original application is incorporated herein by reference. Technical Field

[0002] This application relates to the field of communications, and in particular, to a cell reselection method, a terminal device, and a network device. Background Art

[0003] In the current 5G new radio access technology (NR) system, in order to ensure that the terminal device can achieve a high service rate and low latency, the terminal device needs to have strong capabilities, such as multiple antennas, support for large bandwidth, and so on. However, in actual scenarios, some terminal devices, such as machine type communication (MTC) devices, do not have such high requirements for service rate and latency. Instead, it is necessary to control the cost of the terminal device, that is, the terminal device cannot have strong multiple antenna or large bandwidth capabilities.

[0004] For terminal devices that do not support large bandwidth, during cell search or reselection, they often need to continuously perform cell search or reselection until they find a suitable cell for residence because the bandwidth of the searched or reselected cell is not appropriate. In this way, not only will the cell search and cell reselection time of these terminal devices be increased, but also the power consumption of the terminal device will be increased. Summary of the Invention

[0005] This application provides a cell reselection method, a terminal device, and a network device, which avoid the terminal device from reselecting to a cell that does not support the bandwidth of the terminal device.

[0006] In a first aspect, a cell reselection method is provided, including: the terminal device receives first indication information sent by the network device, and the first indication information is used to indicate information about an initial bandwidth part of a first cell, where the first cell is a neighbor cell of a second cell, and the second cell is the cell where the terminal device is currently resident; the terminal device determines whether to reselect to the first cell according to the type of the terminal device and the first indication information.

[0007] In the above technical solution, the terminal device can obtain information about the initial bandwidth part of the first cell according to the first indication information sent by the network device, and the terminal device determines whether to reselect to the first cell according to whether the information about the initial bandwidth part of the first cell matches the type of the terminal device, thus avoiding the terminal device from reselecting to a cell that does not support the bandwidth of the terminal device.

[0008] Specifically, if the terminal device determines 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 camp when reselecting to the first cell for cell camping because it does not support the initial bandwidth part of the target cell. However, the terminal device of the above technical solution of the present application can first determine whether the bandwidth of the first cell supports the type of the terminal device before reselecting to the first cell, which 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.

[0009] In combination with the first aspect, in some implementation manners of the first aspect, the terminal device determines whether to reselect to the first cell according to 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 criterion, 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.

[0010] In the above technical solution, cell reselection is a process in which the terminal device selects a more suitable cell. If there are some cells with higher priorities or better signals among the neighboring cells of the cell where the current terminal device camps, the protocol stipulates cell reselection measurement criteria to determine which of these neighboring cells need to be measured. When the first cell meets the reselection measurement criterion and needs to be measured, the terminal device determines whether to measure the first cell according to the initial bandwidth part of the first cell, avoiding the terminal device from measuring a cell that does not support the bandwidth, thereby further reducing the power consumption of the terminal device.

[0011] In combination with the first aspect, in some implementation manners of the first aspect, the terminal device determines whether to reselect to the first cell according to 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.

[0012] In the above technical solution, the first cell is the target cell of the terminal device. The target cell refers to the most suitable cell for the terminal device to camp among all neighboring cells that meet the above cell reselection measurement criteria, such as the cell with the strongest signal strength. The terminal device determines whether to reselect to the first cell according to the initial bandwidth part of the first cell, avoiding the terminal device from reselecting to a cell that does not support the bandwidth, thereby reducing the power consumption of the terminal device.

[0013] In connection with the first aspect, in some implementations of the first aspect, the type of the terminal device is a first type of terminal device or a second type of terminal device, and the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different. 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.

[0014] In the above technical solution, due to the different bandwidth capabilities of the first type of terminal device and the second type of terminal device, the first type of terminal device and the second type of terminal device can determine whether to measure or reselect to the first cell according to whether their own bandwidth capabilities match the information of the initial bandwidth part of the first cell.

[0015] In connection with the first aspect, in some implementations of the first 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, the type of the initial bandwidth part of the first cell.

[0016] In the above technical solution, the first type of terminal device and the second type of terminal device can determine whether to measure or reselect to the first cell according to whether their own device types match the bandwidth width and / or the type of the initial bandwidth part of the first cell.

[0017] In connection with the first aspect, in some implementations of the first aspect, the type of the initial bandwidth part of the first cell includes: the initial bandwidth part that supports the residence of the first type of terminal device, the initial bandwidth part that supports the residence of the second type of terminal device, and the initial bandwidth part that supports the residence of both the first type of terminal device and the second type of terminal device.

[0018] In the above technical solution, the first type of terminal device and the second type of terminal device can determine whether to measure or reselect to the first cell according to whether their own device types match the type of the initial bandwidth part of the first cell. In the second aspect, a cell reselection method is provided, including: the network device sends first indication information to the terminal device, and the first indication information is used to indicate the information of the initial bandwidth part of the first cell, where the first cell is a neighbor cell of the second cell, and the second cell is the cell where the terminal device currently resides.

[0019] In the second aspect, a cell reselection method is provided, including: the network device sends first indication information to the terminal device, and the first indication information is used to indicate the information of the initial bandwidth part of the first cell, where the first cell is a neighbor cell of the second cell, and the second cell is the cell where the terminal device currently resides.

[0020] In combination with the second aspect, in some implementations of the second 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, the type of the initial bandwidth part of the first cell.

[0021] In combination with the second aspect, in some implementations of the second aspect, the type of the initial bandwidth part of the first cell includes: 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, where the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0022] Regarding the technical effects brought by the second aspect or various implementations of the second aspect, reference can be made to the introduction of the technical effects of the first aspect or various implementations of the first aspect, and details will not be elaborated here.

[0023] In a third aspect, a method for initial cell access is provided, including: a terminal device receives a first synchronization signal block from a network device, the first synchronization signal block includes first indication information for indicating the cell type of a first cell, the first cell being the cell defined by a second synchronization signal block; the first synchronization signal block includes second indication information for indicating the position of the second synchronization signal block; where the first synchronization signal block is a synchronization signal block of an undefined cell, and the second synchronization signal block is a synchronization signal block of 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.

[0024] 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 respectively. 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, avoiding the terminal device searching for a cell that does not match its own type.

[0025] Specifically, in the prior art, as long as the terminal device finds that the second synchronization signal defines a cell, it goes to the position of the second synchronization signal block to search for the cell, and may not be able to camp because the cell type does not match when camping. In the above technical solution, through 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 camping, 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 camp, but also reduces the power consumption of the terminal device.

[0026] In combination with the third aspect, in some implementation manners of the third aspect, the type of the terminal device is a first type of terminal device or a second type of terminal device, and the bandwidth capabilities of the first type of terminal device and the second type of 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. The bandwidth of the NR terminal device is greater than the bandwidth of the lightweight NR terminal device.

[0027] In the above technical solution, due to the difference in the bandwidth capabilities of the first type of terminal device and the second type of terminal device, and the second synchronization signal block defines the first cell. The first type of terminal device and the second type of terminal device can determine whether to search for the second synchronization signal block at the position of the second synchronization signal block according to whether the bandwidth capability of their own device matches the cell type of the first cell, so as to quickly find a cell suitable for the terminal device to camp on and reduce the power consumption of the terminal device.

[0028] In combination with the third aspect, in some implementation manners of the third aspect, the cell types include: a cell supporting the first type of terminal device to camp on, a cell supporting the second type of terminal device to camp on, and a cell supporting both the first type of terminal device and the second type of terminal device to camp on.

[0029] In the above technical solution, different types of cells support different types of terminal devices to camp on. 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 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 quickly find a cell suitable for the terminal device to camp on and reduce the power consumption of the terminal device.

[0030] In combination with the third aspect, in some implementation manners of the third aspect, before the terminal device receives the first synchronization signal block, the method further 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.

[0031] In a fourth aspect, a cell initial access method is provided, including: the network device sends a first synchronization signal block to the terminal device. The first synchronization signal block includes first indication information for indicating the cell type of the first cell, and the first cell is the cell defined by the second synchronization signal block; the first synchronization signal block includes second indication information for indicating the position of the second synchronization signal block; wherein, the first synchronization signal block is a synchronization signal block of an undefined cell, and the second synchronization signal block is a synchronization signal block of a defined cell.

[0032] In combination with the fourth aspect, in some implementations of the fourth aspect, the cell types include: a cell supporting the residence of a first type of terminal device, a cell supporting the residence of a second type of terminal device, and a cell supporting the residence of both the first type of terminal device and the second type of terminal device, where the first type of terminal device and the second type of terminal device have different bandwidth capabilities.

[0033] Regarding the technical effects brought by the fourth aspect or various implementations of the fourth aspect, reference can be made to the introduction of the technical effects of the third aspect or various implementations of the third aspect, and details will not be elaborated here.

[0034] The fifth aspect provides a cell initial access method, including: a terminal device receiving third indication information, where the third indication information includes a first prohibition parameter and a second prohibition parameter, where the first prohibition parameter is used for the first type of terminal device to perform initial access to a first cell, and the second prohibition parameter is used for the 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 terminal device determines whether to use the first prohibition parameter or the second prohibition parameter according to the type of the terminal device.

[0035] In the above technical solution, two sets of cell prohibition parameters are configured, and the terminal device can flexibly select the corresponding first cell prohibition parameter 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 having the same frequency as the first cell according to the corresponding cell prohibition parameter.

[0036] The sixth aspect provides a cell initial access method, including: a network device sending third indication information, where the third indication information includes a first prohibition parameter and a second prohibition parameter, where the first prohibition parameter is used for the first type of terminal device to perform initial access to a first cell, and the second prohibition parameter is used for the second type of terminal device to perform initial access to the first cell, where the first type of terminal device and the second type of terminal device have different bandwidth capabilities.

[0037] Regarding the technical effects brought by the sixth aspect, reference can be made to the introduction of the technical effects of the fifth aspect, and details will not be elaborated here.

[0038] The seventh aspect provides a terminal device, including: a transceiver unit, configured to receive first indication information sent by a network device, where the first indication information is used to indicate information about an initial bandwidth portion of a first cell, where the first cell is a neighbor cell of a second cell, and the second cell is the cell where the terminal device currently resides; a processing unit, configured to determine whether to reselect to the first cell according to the type of the terminal device and the first indication information.

[0039] In combination with the seventh aspect, in some implementations of the seventh aspect, the processing unit is specifically configured to: when it is detected that the first cell meets the reselection measurement criterion, if the type of the terminal device does not support the initial bandwidth part of the first cell, then do not measure the first cell; if the type of the terminal device supports the initial bandwidth part of the first cell, then measure the first cell.

[0040] In combination with the seventh aspect, in some implementations of the seventh aspect, the processing unit is specifically configured to: when it is determined that the first cell is the target cell, if the type of the terminal device does not support the initial bandwidth part of the first cell, then 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, then control the terminal device to reselect from the second cell to the first cell.

[0041] In combination with the seventh aspect, in some implementations of the seventh aspect, the type of the terminal device is a first type of terminal device or a second type of terminal device, and the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0042] In combination with the seventh aspect, in some implementations of the seventh aspect, the information about 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, the type of the initial bandwidth part of the first cell.

[0043] In combination with the seventh aspect, in some implementations of the seventh aspect, the type of the initial bandwidth part of the first cell includes: the initial bandwidth part that supports the residence of the first type of terminal device, the initial bandwidth part that supports the residence of the second type of terminal device, and the initial bandwidth part that supports the residence of both the first type of terminal device and the second type of terminal device.

[0044] In an eighth aspect, a network device is provided, including: a transceiver unit, configured to send first indication information to a terminal device, where the first indication information is used to indicate information about an initial bandwidth part of a first cell, where the first cell is a neighbor cell of a second cell, and the second cell is a cell where the terminal device currently resides.

[0045] In combination with the eighth aspect, in some implementations of the eighth aspect, the information about 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, the type of the initial bandwidth part of the first cell.

[0046] In combination with the eighth aspect, in some implementations of the eighth aspect, the type of the initial bandwidth part of the first cell includes: the initial bandwidth part that supports the residence of the first type of terminal device, the initial bandwidth part that supports the residence of the second type of terminal device, and the initial bandwidth part that supports the residence of both the first type of terminal device and the second type of terminal device, where the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0047] In a ninth aspect, a terminal device is provided, including: a transceiver unit, configured to receive a first synchronization signal block from a network device, where the first synchronization signal block includes first indication information for indicating 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 includes second indication information for indicating a position of the second synchronization signal block; wherein, the first synchronization signal block is a synchronization signal block of an undefined cell, and the second synchronization signal block is a synchronization signal block of a defined cell; and a processing unit, configured 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.

[0048] In combination with the ninth aspect, in some implementation manners of the ninth aspect, the type of the terminal device is a first type of terminal device or a second type of terminal device, and the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0049] In combination with the ninth aspect, in some implementation manners of the ninth aspect, the cell type includes: a cell supporting the residence of the first type of terminal device, a cell supporting the residence of the second type of terminal device, and a cell supporting the residence of both the first type of terminal device and the second type of terminal device.

[0050] In combination with the ninth aspect, in some implementation manners of the ninth aspect, the processing unit searches for a synchronization signal block in the frequency domain according to a preset step length, and the synchronization signal block is the first synchronization signal block.

[0051] In a tenth aspect, a network device is provided, including: a transceiver unit, configured to send a first synchronization signal block to a terminal device, where the first synchronization signal block includes first indication information for indicating 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 includes second indication information for indicating a position of the second synchronization signal block; wherein, the first synchronization signal block is a synchronization signal block of an undefined cell, and the second synchronization signal block is a synchronization signal block of a defined cell.

[0052] In combination with the tenth aspect, in some implementation manners of the tenth aspect, the cell type includes: a cell supporting the residence of the first type of terminal device, a cell supporting the residence of the second type of terminal device, and a cell supporting the residence of both the first type of terminal device and the second type of terminal device, where the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0053] In an eleventh aspect, a terminal device is provided, including: a transceiver unit configured to receive third indication information sent by a network device, where the third indication information includes a first prohibition parameter and a second prohibition parameter, and where 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, and the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different; and a processing unit configured to determine to use the first prohibition parameter or the second prohibition parameter according to the type of the terminal device.

[0054] In a twelfth aspect, a network device is provided, including: a transceiver unit configured to send third indication information to a terminal device, where the third indication information includes a first prohibition parameter and a second prohibition parameter, and where 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, and where the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0055] Regarding the technical effects brought by the various embodiments of the seventh aspect to the twelfth aspect or the seventh aspect to the twelfth aspect, reference can be made to the descriptions of the technical effects on the method side of the various embodiments of the first aspect to the sixth aspect or the first aspect to the sixth aspect, which will not be elaborated here.

[0056] In a thirteenth aspect, a communication device is provided, including a processor. The processor is coupled to a memory and can be used to execute instructions in the memory to implement the methods in any of the possible implementation manners of the first aspect or the third aspect or the fifth aspect, and the first aspect or the third aspect or the fifth aspect. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface.

[0057] In one implementation manner, 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.

[0058] In another implementation manner, 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.

[0059] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0060] In a fourteenth aspect, a communication device is provided, including a processor. The processor is coupled to a memory and is configured to execute instructions in the memory to implement the method in the second aspect or the fourth aspect or the sixth aspect, and any possible implementation manner in the second aspect or the fourth aspect or the sixth aspect. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface.

[0061] In one implementation manner, 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.

[0062] In another implementation manner, 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.

[0063] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0064] In a fifteenth aspect, a processor is provided, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in the first aspect to the sixth aspect and any possible implementation manner in the first aspect to the sixth aspect.

[0065] In a specific implementation process, the above-mentioned processor may be one or more chips, the input circuit may be input pins, the output circuit may be output pins, and the processing circuit may be transistors, gate circuits, flip-flops, and various logic circuits, etc. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver. The signal output by the output circuit may be output to, for example, but not limited to, a transmitter and transmitted by the transmitter. And the input circuit and the output circuit may be the same circuit, which is used as the input circuit and the output circuit at different times respectively. The embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.

[0066] In a sixteenth aspect, a processing device is provided, including a processor and a memory. The processor is configured to read instructions stored in the memory, and may receive a signal through a receiver and transmit a signal through a transmitter to execute the method in the first aspect to the sixth aspect and any possible implementation manner in the first aspect to the sixth aspect.

[0067] Optionally, the processor is one or more, and the memory is one or more.

[0068] Optionally, the memory may be integrated with the processor, or the memory and the processor may be separately provided.

[0069] In a specific implementation process, the memory may be a non-transitory memory, such as a read only memory (ROM). It may be integrated with the processor on the same chip, or may be separately provided on different chips. The embodiments of the present application do not limit the type of the memory and the setting manner of the memory and the processor.

[0070] It should be understood that related data interaction processes, such as sending indication information, may be a process of outputting indication information from the processor, and receiving capability information may be a process of the processor receiving input capability information. Specifically, the data output by the processor may be output to a transmitter, and the input data received by the processor may come from a receiver. Among them, the transmitter and the receiver may be collectively referred to as a transceiver.

[0071] The processing device in the above 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, which is implemented by reading software code stored in the memory. The memory may be integrated in the processor or may exist independently outside the processor.

[0072] In a seventeenth aspect, there is provided a computer program product, which includes: a computer program (which may also be referred to as code or instruction). When the computer program is run, it causes a computer to execute the methods in the above first aspect to the sixth aspect and any possible implementation manner in the first aspect to the sixth aspect.

[0073] In an eighteenth aspect, there is provided a computer-readable storage medium, which stores a computer program (which may also be referred to as code or instruction). When it runs on a computer, it causes the computer to execute the methods in the above first aspect to the sixth aspect and any possible implementation manner in the first aspect to the sixth aspect.

[0074] In a nineteenth aspect, there is provided a communication system, which includes a terminal device in the seventh aspect or the ninth aspect or the eleventh aspect or the thirteenth aspect and a network device in the eighth aspect or the tenth aspect or the twelfth aspect or the fourteenth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 is a schematic diagram of a network architecture provided by an embodiment of the present application.

[0076] Figure 2 It is a schematic diagram of a possible deployment method of a synchronization signal block and an initial bandwidth part in the lightweight NR system according to an embodiment of the present application.

[0077] Figure 3 It is a schematic diagram of another possible deployment method of a synchronization signal block and an initial bandwidth part in the lightweight NR system according to an embodiment of the present application.

[0078] Figure 4 It is a schematic interaction diagram of a cell initial access method provided by an embodiment of the present application.

[0079] Figure 5 It is a schematic interaction diagram of a cell reselection method provided by an embodiment of the present application.

[0080] Figure 6 It is a schematic interaction diagram of another cell initial access method provided by an embodiment of the present application.

[0081] Figure 7 It is a schematic block diagram of a communication device provided by an embodiment of the present application.

[0082] Figure 8 It is a schematic block diagram of another communication device provided by an embodiment of the present application.

[0083] Figure 9 It is a schematic block diagram of a terminal device provided by an embodiment of the present application.

[0084] Figure 10 It is a schematic block diagram of a network device provided by an embodiment of the present application. Detailed implementation manners

[0085] Next, the technical solutions in the present application will be described in conjunction with the accompanying drawings.

[0086] The technical solutions of the embodiments of this application can be applied to various communication systems, such as: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, future 5th generation (5G) systems or New Radio (NR), Vehicle-to-Everything (V2X), where V2X can 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), Long Term Evolution-Machine (LTE-M), Machine-to-Machine (M2M), etc.

[0087] The technical solutions provided by this application can also be applied to future communication systems, such as the sixth generation mobile communication system, etc. This application does not make any limitations in this regard.

[0088] Figure 1 The schematic diagram of a network architecture provided by the embodiments of this application is shown. As Figure 1 shown, the communication system of the embodiments of this application can include a network device and multiple terminal devices. The network device can include 1 antenna or multiple antennas. Additionally, the network device can additionally include a transmitter chain and a receiver chain, and those of ordinary skill in the art can understand that they can both include multiple components related to signal transmission and reception (such as processors, modulators, multiplexers, demodulators, demultiplexers, or antennas, etc.).

[0089] The network device can communicate with multiple terminal devices. The terminal device in the embodiments of this application can also be referred to as: user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal, user unit, user station, mobile station, mobile platform, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0090] The terminal device can be a device that provides voice / data connectivity to users. For example, it can be a handheld device with wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminal devices are: mobile phone, tablet computer, laptop computer, palm computer, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, vehicle-mounted device, wearable device, terminal device in a 5G network or terminal device in a future evolved public land mobile network (PLMN) and / or any other suitable device for communicating on a wireless communication system. The embodiments of this application are not limited thereto.

[0091] Among them, wearable devices, also known as wearable intelligent devices, are the general term for devices developed by applying wearable technologies to the intelligent design of daily wear, such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that are directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not just a kind of hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable intelligent devices include those with complete functions and large sizes that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones, such as various smart bracelets and smart jewelry for physical sign monitoring.

[0092] 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 technologies, so as to realize an intelligent network of human-machine interconnection and thing-thing interconnection.

[0093] In addition, in the embodiments of the present application, the terminal device can also include sensors such as intelligent printers, train detectors, and gas stations. Its main functions include collecting data (for some terminal devices), receiving control information and downlink data from network devices, and sending electromagnetic waves to transmit uplink data to network devices.

[0094] The network device in the embodiments of this application may be a device for communicating with a terminal device. The network device may be an evolved node B (eNB or eNodeB) in an LTE system, may also be a radio controller in a cloud radio access network (CRAN) scenario, may also be a radio network controller (RNC), a base station controller (BSC), a home base station (for example, home evolved nodeB, or home nodeB, HNB), a baseband unit (BBU), or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, and a network device in a future 5G network or a network device in a future evolved PLMN network, etc. It may be an access point (AP), a wireless relay node, a wireless backhaul node, a transmission point (TP), or a transmission and reception point (TRP) in a wireless local area network (WLAN), etc. It may be a gNB or a transmission point (TRP or TP) in a new radio (NR) system, or one or a group (including multiple antenna panels) of antenna panels of a base station in a 5G system, or may also be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU), etc. The embodiments of this application do not limit this.

[0095] In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include an active antenna unit (AAU for short). 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, implementing radio resource control (RRC), and the functions of the packet data convergence protocol (PDCP) layer. The DU is responsible for processing physical layer protocols and real-time services, implementing the functions of the radio link control (RLC) layer, the medium 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 ultimately become the information of the PHY layer, or is transformed from the information of the PHY layer, thus, in this architecture, high-layer 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 may be a device including one or more of the CU node, the DU node, and the AAU node. In addition, the CU may be classified as a network device in the radio access network (RAN), or the CU may be classified as a network device in the core network (CN). This application does not make any limitations on this.

[0096] In addition, in the embodiments of this application, the network device provides services for a cell, and the terminal device communicates with the cell through the transmission resources allocated by the network device (for example, frequency domain resources, or in other words, spectrum resources). This cell may belong to a macro base station (such as a macro eNB or a macro gNB, etc.), or may belong to the base station corresponding to a small cell. Here, the small cell may include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage range and low transmission power, and are suitable for providing high-rate data transmission services.

[0097] In addition, in the embodiments of this application, the network device may include a base station (gNB), such as a macro station, a micro base station, an indoor hotspot, and a relay node, etc. Its function is to send radio waves to the terminal device, on the one hand, to achieve downlink data transmission, on the other hand, to send scheduling information to control uplink transmission, and to receive the radio waves sent by the terminal device and receive uplink data transmission.

[0098] To better understand the embodiments of the present application, the concepts involved in the embodiments of the present application will be introduced first below.

[0099] 1. Synchronization Signal and PBCH Block (SSB), which contains the primary / secondary synchronization signals and the Physical Broadcast Channel (PBCH), provides downlink synchronization for the UE and the basic configuration information of the cell. Among them, the PBCH carries the Master Information Block (MIB) of the cell, and the MIB indicates whether there is a System Information Block Type 1 (SIB1) and the location of the SIB1. The SSB occupies 4 symbols in the time domain and 20 PRBs in the frequency domain. The SSB can be divided into cell-defined SSB and non-cell-defined SSB. The cell-defined SSB means that this SSB defines a cell, specifically manifested as the MIB indicating the existence of the SIB1, while the non-cell-defined SSB means that this SSB does not define a cell. In the non-cell-defined SSB, the MIB indicates the non-existence of the SIB1, and the bit positions originally used to indicate the location of the SIB1 may be used to indicate the location of the next cell-defined SSB. The SSB appears in the frequency domain with a certain pattern, that is, at a certain interval, an SSB may appear. When the UE powers on, it can search for cells according to this interval. If an SSB is a cell-defined SSB, it can be considered that there is a cell where the UE can camp.

[0100] 2. Bandwidth Part (BWP): In the physical layer of the fifth-generation wireless access system standard NR, the unit of downlink frequency-domain resources is the resource block (RB). With the increase in mobile users and the emergence of high-capacity services (such as high-definition video services), an important aspect of the evolution of mobile communication towards future 5G systems or NR systems is to support large bandwidths. The larger the bandwidth, the more bandwidth resources are available for data transmission, and the larger the amount of supported services. In a communication system with a large carrier bandwidth, considering the cost of the UE and the UE's traffic volume, 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 ability 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 capabilities of UEs may be 20 MHz, 50 MHz, or 100 MHz, etc. In a wireless communication system, the RF bandwidth capabilities of different UEs can be the same or different.

[0101] In a communication system with a large carrier bandwidth, since the RF bandwidth capability of the UE is less than the carrier bandwidth, the concept of the bandwidth part is proposed, that is, a BWP includes a continuous number of RBs in the frequency domain. The terminal device transmits on its own BWP. A BWP can be a set of continuous frequency-domain resources on the carrier. The frequency-domain resources that different BWPs can occupy can partially overlap or not overlap at all. Allocate part of the spectrum for the UE to use on a broadband to adapt to the bandwidth that the UE can support, and by configuring multiple different bandwidth BWPs for the UE, flexible scheduling of the UE and energy saving of the UE can be achieved.

[0102] Initial BWP: The bandwidth indicated by the MIB broadcast in the cell-defined SSB where SIB1 is located is defined as the Initial BWP. On the Initial BWP, the UE can obtain SIB1 and other system information (OSI), and can monitor paging. In the current protocol, the bandwidth of the Initial BWP can be configured as 5M, 10M, or 20M.

[0103] Active BWP: When there is traffic arriving at the UE, the base station will schedule it from the Initial BWP to a BWP whose bandwidth matches the traffic. This BWP is called the Active BWP. According to the current standard, the common search space (CSS) of physical downlink control channel (PDCCH) of Type 0A and Type 2 is configured on the Active BWP, that is, the UE can receive paging and OSI on the current Active BWP.

[0104] 3. The MIB contains the following parameters:

[0105] - SystemFrameNumber, 6 bits, representing the high 6 bits of the frame number of the current frame;

[0106] - SubCarrierSpacingCommon, 1 bit, representing the subcarrier spacing of the Initial BWP;

[0107] - Ssb - SubcarrierOffset, 3 bits. When taking special values, it means that the MIB has no corresponding SIB1, that is, this SSB is non - cell - defined;

[0108] - Dmrs - TypeA - Position, 1 bit, representing the type of demodulation reference signal (DMRS);

[0109] - pdcch - ConfigSIB1, 8 bits, representing the position where SIB1 (Initial BWP) is located. If the SSB is non - cell - defined, it can be used to indicate the position of the CD - SSB;

[0110] - cellBarred, 1 bit, indicating whether the current cell is barred;

[0111] - intraFreqReselection, 1 bit, indicating whether the UE is allowed to reselect to other cells on the current frequency if the current cell is barred;

[0112] 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 camp on a certain cell. The parameters include two: cellBarred and intraFreqReselection. When the UE reads the MIB of a certain cell, if it is found that the cell is barred through cellBarred, the UE cannot camp on the current cell. If intraFreqReselection is set to NotAllowed, it means that the UE cannot reselect to other cells on this frequency either. If intraFreqReselection is set to Allowed, it means that the UE can reselect to other cells on this frequency.

[0113] 5. Cell reservation is a means for the network to control the purpose of cell usage. When the network sets the current cell as a reserved cell for other usage purposes, even if the cellBarred of the current cell does not prohibit the UE from camping, the UE cannot camp on the current cell.

[0114] Figure 2 and Figure 3 are schematic diagrams applicable to the possible deployment methods of the synchronization signal block SSB and the initial bandwidth part Initial BWP in the lightweight NR system of the embodiment of the present application.

[0115] The 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 properly. 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 an enhancement of the existing NR system.

[0116] A lightweight NR cell refers to a cell that provides services for terminal devices with low hardware capabilities.

[0117] For Figure 2 the scenario shown, one cell-defined-SSB maps out only one Initial BWP, and either a normal NR cell or a lightweight NR cell is defined. A normal NR cell can also be called a legacy NR cell or an NR cell, and a lightweight NR cell can also be called an NR-light cell. The present application does not limit the names of cell types. The difference between the two is the relevant configuration. Generally speaking, the bandwidth of the Initial BWP of an NR-light cell is narrower than that of an NR cell.

[0118] The bandwidth of the Initial BWP of the NR-light cell is relatively narrow. For a terminal device that can only camp on the NR-light cell, it can be called a lightweight NR terminal device or an NR-light terminal device. While the bandwidth of the Initial BWP of the NR cell is relatively wide, and for a terminal device that can camp on the NR cell, it is called a legacy NR terminal device or an NR terminal device. The bandwidth of the NR terminal device is greater than that of the NR-light terminal device. The names of the above terminal devices are only exemplary, and this application does not limit the names of the terminal devices.

[0119] It should be understood that since the bandwidth of the NR terminal device is greater than that of the NR-light terminal device, the legacy NR terminal device can choose to camp on the NR-light cell in addition to camping on the NR cell.

[0120] In Figure 2 In the scenario shown, SSB1 maps out the Initial BWP available for NR terminal devices, that is, it defines an NR cell, and SSB2 maps out the Initial BWP available for NR-light terminal devices, that is, it defines an NR-light cell.

[0121] For Figure 3 In the scenario shown, the SSB maps out two Initial BWPs. One Initial BWP is the Initial BWP available for NR terminal devices, and the other Initial BWP is the Initial BWP available for NR-light terminal devices. That is, this SSB defines a cell that combines NR and NR-light, and this cell can support two types of terminal devices.

[0122] During the current cell search process, the terminal device searches for cell-defined-SSB in the frequency domain at a certain step size. If an SSB is a non-cell-defined-SSB, then in its MIB, only the position of the next cell-defined-SSB is indicated, and it does not consider whether the cell defined by the next cell-defined-SSB is suitable for the terminal device to camp. This may increase the time for the terminal device to search for a suitable cell and increase the power consumption at the same time.

[0123] In view of this, the embodiments of this application optimize the cell search mechanism of the terminal device so that the NR-light terminal device can effectively find a suitable cell to camp, save the search time, and reduce the power consumption of the terminal device.

[0124] The following will detail each embodiment provided by this application in conjunction with the drawings.

[0125] Figure 4 It is a schematic interaction diagram of a cell initial access method provided by an embodiment of the present application. Figure 4 The terminal device in Figure 1 can be the terminal device 120 or 130 in Figure 1 and the network device can be the network device 110 in

[0126] S410, the terminal device receives the first SSB sent by the network device.

[0127] Correspondingly, the network device sends the first SSB to the terminal device at the position of the first SSB.

[0128] Optionally, the first SSB is the SSB searched by the terminal device in the frequency domain after power-on according to a preset step size.

[0129] The first SSB may be a non-cell-defined-SSB, and the first SSB 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.

[0130] Optionally, the terminal device can obtain the first indication information and the second indication information from the PBCH of the first SSB. According to a possible implementation manner, the terminal device can obtain the first indication information and the second indication information from the MIB in the PBCH of the first SSB.

[0131] Optionally, the cell type of the first cell includes: a cell supporting the residence of the first type of terminal device, a cell supporting the residence of the second type of terminal device, or a cell supporting the residence of the first type of terminal device and the second type of terminal device at the same time. For example, the following takes the cell supporting the residence of the first type of terminal device including legacy NR cells, the cell supporting the residence of the second type of terminal device including NR-light cells, and the cell supporting the residence of the first type of terminal device and the second type of terminal device at the same time including cells with both NR and NR-light as an example for illustration, and vice versa.

[0132] The hardware capabilities of the above-mentioned first type of terminal device and the second type of terminal device are different. Specifically, it may include different supported bandwidths, different numbers of antennas, different maximum modulation orders supported, different maximum subcarrier spacings supported, different signal processing capabilities, etc. Hereinafter, the case where the hardware capabilities of the first type of terminal device are greater than those of the second terminal device will be described, 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.

[0133] Optionally, since 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 (i.e., the two bits of cellBarred and intraFreqReselection) of the cell barring parameter in the first synchronization signal block 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 present application does not limit the specific method of reinterpreting these three bits.

[0134] S420, 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 first indication information.

[0135] 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 residence of 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 camp on the first cell. Then, the terminal device searches for the second synchronization signal block at the position of the second synchronization signal block. If the first cell is a cell that supports the residence of 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.

[0136] 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 residence of 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 camp on the first cell. Then, the terminal device searches for the second synchronization signal block at the position of the second synchronization signal block. If the first cell is a cell that supports the residence of 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 by the previous protocol.

[0137] Optionally, since the first type of terminal device (e.g., legacy NR terminal device) can also camp on a cell that supports the camping of the second type of terminal device (e.g., NR-light cell), the legacy NR terminal device can also directly search for the second synchronization information block at the location of the second synchronization signal block, regardless of whether the cell defined by the second synchronization information block is an NR cell or not.

[0138] The above technical solution can enable the terminal device of NR-light to quickly determine whether the cell is suitable for it to camp by indicating the type of the cell defined by the next cell-defined-SSB in the non-cell-defined-SSB, thereby reducing the NR-light cell search time and saving the power consumption of the terminal device.

[0139] After the terminal device successfully camps on a cell, it will continuously monitor the signal quality of neighboring cells and the current cell in the idle mode for cell reselection, so as to select the best cell for the terminal device to provide service signals.

[0140] For ease of understanding, cell selection / reselection is briefly introduced first.

[0141] 1. Cell selection

[0142] When the terminal device powers on or a radio link failure occurs, etc., the terminal device will perform a cell search process and select a suitable cell to camp as soon as possible, and this process is called "cell selection".

[0143] An example of a possible cell selection process is as follows:

[0144] During the cell search process, the terminal device will read the system information of the cell, obtain parameters such as Qrxlevmeas, Qrxlevmin, and Qrxlevminoffset, and 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 a suitable cell is found and camps.

[0145] S criterion formula: Srxlev>0, that is, if the S value of the cell is greater than 0, it means that the cell is a suitable cell, that is, a cell suitable for camping. The calculation formula of Srxlev is:

[0146] Srxlev = Qrxlevmeas - (Qrxlevmin - Qrxlevminoffset) - Pcompensation

[0147] Where:

[0148] Srxlev: Calculated cell selection received level value;

[0149] Qrxlevmeas: Received signal strength value measured by the terminal device, and this value is the measured reference signal receiving power (RSRP);

[0150] Qrxlevmin: Minimum received signal strength value required by this cell;

[0151] Pcompensation: The larger value of (PEMAX – PUMAX) or 0, where PEMAX is the maximum allowable transmission power set by the system when the terminal device accesses this cell; PUMAX refers to the maximum output power specified according to the terminal device class.

[0152] Qrxlevminoffset: This parameter is only effective when the terminal device normally camps on a virtual private mobile network (VPMN) and periodically searches for a high-priority public land mobile network (PLMN) for cell selection evaluation, and this parameter biases Qrxlevmin to a certain extent.

[0153] It should be noted that due to the evolution of the communication protocol version, the S criterion formula and the calculation formula of Srxlev may change for certain reasons. The formulas given here are only examples and do not make any limitations on the formulas themselves. The embodiments of this application do not limit the parameters and criteria for cell selection.

[0154] 2. Cell reselection measurement criteria

[0155] After the terminal device camps on a cell, as the terminal device moves, the terminal device may need to switch to another cell with a higher priority or better signal to camp, and this is the cell reselection process. Cell selection is a process of quickly finding a suitable cell, and cell reselection is a process of selecting a more suitable cell. For the power saving of the terminal device, the protocol stipulates the cell reselection measurement criteria:

[0156] For frequency layers or systems with a priority higher than the cell on which it is camping, the terminal device always measures them;

[0157] If Srxlev of the camping cell <= Sintrasearch, the terminal device starts to measure the same-frequency / same-priority cells, where Sintrasearch is the same-frequency measurement start threshold;

[0158] If the Srxlev of the serving 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;

[0159] 3. Cell reselection criteria

[0160] After measurement, the terminal device determines whether to perform cell reselection to a new cell. The reselection criteria are as follows:

[0161] Reselection criteria for high-priority frequencies or systems: The terminal device has stayed in the original cell for more than 1 second, and at the same time, the 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;

[0162] Reselection criteria for low-priority frequencies or systems: The terminal device has stayed in the original cell for more than 1 second and no cell in the high-priority (or equal-priority) frequency meets the reselection requirement conditions. At the same time, the Srxlev of the serving 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;

[0163] Reselection criteria for equal-priority frequencies or systems: The terminal device has stayed in the original cell for more than 1 second and no cell in the high-priority frequency meets the reselection requirement conditions. At the same time, cell reselection to an equal-priority frequency cell 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 serving cell, and Rn is the ranking value of the neighboring cell:

[0164] Rs = Qmeas_s + Qhyst – Qoffset_temp, Rn = Qmeas_s – Qoffset – Qoffset_temp

[0165] Where:

[0166] Qhyst: Hysteresis value, used to prevent ping-pong reselection;

[0167] Qmeas_s: The received signal strength value of the serving cell measured by the terminal device;

[0168] Qoffset: For the same frequency, when Qoffsets_n is valid, its value is Qoffsets_n; otherwise, its value is 0. For different frequencies, when Qoffsets_n is valid, its value is Qoffsets_n + Qoffsetfrequency; otherwise, its value is Qoffsetfrequency.

[0169] Qoffset_temp: It can represent the deviation amount. The deviation amount can be, for example, broadcast by the network and added to a cell when the terminal device fails to establish an RRC connection on the cell.

[0170] The terminal device will rank the rrc values of all cells that meet the cell selection S criterion. During reselection, it does not simply reselect to the cell with the best ranking, but finds the highest ranking value during the ranking, and all cells within a certain range (such as x dB, where x is configurable) from it are considered similar cells. The cell with the highest final ranking value is also called the target cell.

[0171] Generally, the configuration parameters required above for the current serving cell and neighboring cells are broadcast in the system message of the current serving cell, 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 (beams) with the signal strength of each cell higher than the threshold can be used to generate the cell quality, and the cell quality is used as Qmeas after being filtered by layer 3. Among them, the threshold and N are notified to the terminal device in the broadcast message, and N is an integer greater than 1 or equal to 1. Among them, the beam higher than the threshold is considered a good beam.

[0172] It should be noted that due to the evolution of the communication protocol version, the calculation formulas of Rs and Rn may change for some reasons. The formulas given here are only examples and do not make any limitations on the formulas themselves. The embodiments of the present application do not limit the parameters and criteria for cell reselection.

[0173] As mentioned above, according to the above cell reselection mechanism, only the signal quality of the cell is used to determine the target cell, without considering that the NR-light terminal device may not have the large bandwidth capability, which may cause the terminal device to not support the Initial BWP bandwidth of the target cell, resulting in the inability to reselect to the target cell, which may cause waste of resources and increase the power consumption of the terminal device.

[0174] In view of this, the embodiments of the present application optimize the reselection mechanism of the NR-light cell, enabling the NR-light terminal device to avoid measuring or reselecting to a cell that is not supported by the bandwidth, saving signaling overhead, and reducing the power consumption of the terminal device.

[0175] Figure 5 It is a schematic interaction diagram of a cell reselection method provided by the embodiments of the present application. Figure 5 The terminal device in Figure 1 can be the terminal device 120 or 130 in Figure 1 and the network device can be the network device 110 in

[0176] S510, the terminal device receives the first indication information sent by the network device.

[0177] Correspondingly, the network device sends the first indication information to the terminal device.

[0178] After the terminal device camps on the second cell, it continuously receives the system information related to the reselection of the second cell sent by the network device. The system information includes the first indication information, and the first indication information is used to indicate the information of the Initial BWP bandwidth of the first cell. The first cell is a neighbor cell of the second cell. For example, the information of 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.

[0179] As an example rather than a limitation, the first indication information includes the parameter Per frequency / cell, and Perfrequency / cell is used to indicate the information of the Initial BWP bandwidth of the first cell.

[0180] 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.

[0181] Optionally, if all neighbor cells of the second cell support multiple widths of the Initial BWP bandwidth, the system information related to the reselection of the second cell may include, in addition to the width of the Initial BWP bandwidth of the first cell, the widths of other multiple Initial BWP bandwidths. To save the overhead of the system information, a common width of the Initial BWP bandwidth can be broadcast, and then the widths of the cell bandwidths different from the common bandwidth can be broadcast.

[0182] Optionally, the first indication information may also be used to indicate the type of the Initial BWP bandwidth of the first cell. For example, the Initial BWP bandwidth types include: the Initial BWP bandwidth supporting the residence of the first type of terminal device, the Initial BWP bandwidth supporting the residence of the second type of terminal device, and the Initial BWP bandwidth supporting the residence of both the first type of terminal device and the second type of terminal device. For example, the Initial BWP bandwidth supporting the residence of the first type of terminal device includes the Initial BWP bandwidth of a legacy NR cell, the Initial BWP bandwidth supporting the residence of the second type of terminal device includes the Initial BWP bandwidth of an NR-light cell, and the Initial BWP bandwidth supporting the residence of both the first type of terminal device and the second type of terminal device includes the Initial BWP bandwidth of a cell with both NR and NR-light characteristics.

[0183] The above-mentioned first type of terminal device and the second type of terminal device may be terminal devices with different hardware capabilities. Specifically, it may include different supported bandwidths, different numbers of antennas, different supported maximum modulation orders, different supported maximum subcarrier spacings, different signal processing capabilities, etc. Taking the example where the hardware capabilities of the first type of terminal device are greater than those of the second terminal device, the reverse is also true. For example, the first type of terminal device includes a legacy NR terminal device, the second type of terminal includes an NR-light terminal device, and the bandwidth of the NR terminal device is greater than that of the NR-light terminal device.

[0184] 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, in addition to indicating the type of the Initial BWP bandwidth of the first cell, also indicate multiple other bandwidth types respectively. To save the overhead of system information, it may only indicate the type of the Initial BWP bandwidth of the cell supporting the residence of the second type of terminal device, for example, only indicate the Initial BWP bandwidth of an NR-light cell.

[0185] Optionally, the first indication information may also be used to indicate the Initial BWP bandwidth re-indicated in the SIB1 of the first cell.

[0186] Optionally, the first indication information may further include: the carrier width configuration of the first cell, the frequency band information of the first cell. For example, the carrier width configuration may include the carrier start position and bandwidth of the first cell under different subcarrier spacings.

[0187] 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.

[0188] 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.

[0189] Optionally, if the first cell meets the reselection measurement criteria, the terminal device determines 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.

[0190] If the type of the terminal device supports the initial BWP bandwidth of the first cell, measure the first cell; if the type of the terminal device does not support the initial BWP bandwidth of the first cell, do not measure the first cell. In this way, the first cell will not ultimately become the target cell for cell reselection.

[0191] 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 when 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, it will not measure the first cell.

[0192] As described above, before the terminal device performs cell reselection, the terminal device determines the target cell for reselection according to the existing cell reselection criteria.

[0193] Optionally, if the first cell is the target cell of the terminal device, the terminal device determines whether it supports the initial BWP 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.

[0194] If the type of the terminal device supports the initial BWP bandwidth of the first cell, reselect to the first cell; if the type of the terminal device does not support the initial BWP bandwidth of the first cell, do not measure the first cell.

[0195] 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 when the terminal device supports all the information about the first cell in the first indication information, the terminal device will reselect to the first cell; otherwise, it will not reselect to the first cell.

[0196] In the above solution, by carrying the Initial BWP bandwidth information of the neighboring cell in the first indication information, the NR-light terminal device is prevented from measuring or reselecting to a cell with a bandwidth that it does not support, thereby reducing the power consumption of the terminal device.

[0197] As described above, the MIB contains the parameter cell barring, but currently there is only one set of cell barring parameters in the MIB, which is only applicable to Figure 2 the scenarios shown, but for Figure 3 the scenarios shown, the cell-defined-SSB-defined cell supports both NR cells and NR-light cells, and the current cell barring parameters cannot simultaneously indicate the access prohibition functions of the two types of cells.

[0198] In view of this, the present application proposes a method that can configure the cell barring parameters more flexibly for Figure 3 the scenarios shown.

[0199] Figure 6 FIG. is a schematic interaction diagram of another cell initial access method provided by an embodiment of the present application.

[0200] S610, the terminal device receives the third indication information sent by the network device. Figure 6 The terminal device in Figure 1 may be the terminal device 120 or 130 in Figure 1 and the network device may be the network device 110 in

[0201] Correspondingly, the network device sends the third indication information to the terminal device.

[0202] Optionally, the terminal device may obtain the third indication information from the MIB of the first cell sent by the network device.

[0203] The third indication information includes a first prohibition parameter and a second prohibition parameter. The first prohibition parameter is used for the first type of terminal device to perform initial access to the first cell, and the second prohibition parameter is used for the second type of terminal device to perform initial access to the first cell.

[0204] The above-mentioned first type of terminal device and the 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. Below, an example will be given with the hardware capabilities of the first type of terminal device being greater than those of the second type of 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 that of the NR-light terminal device.

[0205] The first prohibited parameter and the second prohibited parameter each include a set of cell barring parameters. 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 camp on a certain cell. Cell barring includes two parameters: cellBarred and intraFreqReselection. When 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 camp on the current cell. If intraFreqReselection is set to NotAllowed, it means that the terminal device cannot reselect to other cells on this frequency either. If intraFreqReselection is set to Allowed, it means that the terminal device can reselect to other cells on this frequency.

[0206] Optionally, the third indication information includes the first reservation indication information or the second reservation indication information or the 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 means that the terminal device cannot camp on the first cell; the second reservation indication information indicates a cell reservation indication set for the first type of terminal device for the first cell. If the second reservation indication information is true, it means that the first type of terminal device cannot camp on the first cell; the third reservation indication information indicates a cell reservation indication set for the second type of terminal device for the first cell. If the third reservation indication information is true, it means that the second type of terminal device cannot camp on the first cell.

[0207] Optionally, the third indication information can be indicated by cell-defined-SSB indicating the location of the first cell.

[0208] Optionally, the third indication message can be indicated by SIB1 of the first cell.

[0209] Optionally, the third indication information can be indicated by other SIBs of the first cell.

[0210] In S620, the terminal device determines whether to use the first barring parameter or the second barring parameter according to the terminal device type and the third indication information.

[0211] The terminal device decides whether to use the first barring parameter or the second barring parameter in the third indication information according to whether it is a first type of terminal device or a second type of terminal device.

[0212] If the terminal device is a first type of terminal device, it uses the first barring parameter to further determine whether it can camp on the first cell or a cell with the same frequency as the first cell;

[0213] If the terminal device is a second type of terminal device, it uses the second barring parameter to further determine whether it can camp on the first cell or a cell with the same frequency as the first cell.

[0214] Through 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 camp on the cell or other cells with the same frequency as the cell according to the selected cell barring parameter.

[0215] Each of the embodiments described herein may be an independent solution or may be combined according to the internal logic, and all these solutions fall within the protection scope of this application.

[0216] It can be understood that the methods and operations implemented by the terminal device in the above method embodiments can also be implemented by components (such as chips or circuits) available for the terminal device, and the methods and operations implemented by the network device in the above method embodiments can also be implemented by components (such as chips or circuits) available for the network device.

[0217] The method embodiments provided in this application are described above, and the device embodiments provided in this application will be described below. It should be understood that the description of the device embodiments corresponds to the description of the method embodiments. Therefore, the content not described in detail can be referred to the above method embodiments, and for the sake of brevity, it will not be repeated here.

[0218] The above mainly describes the solution provided by the embodiments of the present application from the perspective of the interaction between each network element. It can be understood that each network element, such as a transmitting device or a receiving device, includes corresponding hardware structures and / or software modules for implementing the above functions. Those skilled in the art should be able to realize that, in combination with the units and algorithm steps of the examples described in the embodiments disclosed in this article, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described function for each specific application, but such implementation should not be considered to exceed the protection scope of the present application.

[0219] The embodiments of the present application can divide the functional modules of the transmitting device or the receiving device according to the above method examples. 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 a software functional module. It should be noted that the division of modules in the embodiments of the present application is illustrative, only a logical function division, and there can be other feasible division methods in actual implementation. The following takes the example of dividing each functional module corresponding to each function for illustration.

[0220] Figure 7 It is a schematic block diagram of a communication device provided by 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 referred to as a communication interface or a communication unit.

[0221] Optionally, the communication device 700 may further include a storage unit, which can be used to store instructions and / or data, and the processing unit 720 can read the instructions and / or data in the storage unit.

[0222] The communication device 700 can be used to perform the actions executed by the terminal device in the above method embodiments. At this time, the communication device 700 can be a terminal device or a component configurable in a terminal device. The transceiver unit 710 is used to perform the transceiver-related operations on the terminal device side in the above method embodiments, and the processing unit 720 is used to perform the processing-related operations on the terminal device side in the above method embodiments.

[0223] Alternatively, the communication device 700 can be used to perform the actions executed by the network device in the above method embodiments. In this case, the communication device 700 can be a network device or a component configurable in a network device. The transceiver unit 710 is used to perform the operations related to transceiver on the network device side in the above method embodiments, and the processing unit 720 is used to perform the operations related to processing on the network device side in the above method embodiments.

[0224] As a design, when the communication device 700 is a terminal device, it is used to perform the actions executed by the terminal device in the above Figure 4 illustrated embodiments. The transceiver unit 710 is used to: receive first indication information sent by a network device, where the first indication information is used to indicate information about an initial bandwidth part of a first cell, and the first cell is a neighbor cell of a second cell, and the second cell is the cell where the terminal device currently camps; the processing unit 720 is used to: when detecting that the first cell meets the reselection measurement criteria, determine whether to measure the first cell according to the type of the terminal device and the first indication information.

[0225] Optionally, the processing unit 720 is used to: when detecting 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 do not measure the first cell; if the type of the terminal device supports the initial bandwidth part of the first cell, then measure the first cell.

[0226] Optionally, the processing unit 720 is used to: when determining that the first cell is a target cell, if the type of the terminal device does not support the initial bandwidth part of the first cell, then 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, then control the terminal device to reselect from the second cell to the first cell.

[0227] Optionally, the type of the terminal device is a first type of terminal device or a second type of terminal device, and the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0228] Optionally, the information about 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, the type of the initial bandwidth part of the first cell.

[0229] Optionally, the type of the initial bandwidth part of the first cell includes: an initial bandwidth part supporting the residence of the first type of terminal device, an initial bandwidth part supporting the residence of the 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.

[0230] As another design, when the communication device 700 is a network device, it is used to perform the aboveFigure 4 In the embodiment shown, for the actions performed by the network device, the transceiver unit 710 is configured to: send first indication information to the terminal device, where the first indication information is used to indicate information about the initial bandwidth part of the first cell, and the first cell is a neighbor cell of the second cell, and the second cell is the cell where the terminal device is currently camped.

[0231] Optionally, the information about 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, the type of the initial bandwidth part of the first cell.

[0232] Optionally, the type of the initial bandwidth part of the first cell includes: the initial bandwidth part that supports the residence of the first type of terminal device, the initial bandwidth part that supports the residence of the second type of terminal device, and the initial bandwidth part that simultaneously supports the residence of the first type of terminal device and the second type of terminal device, where the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0233] As another design, when the communication device 700 is a terminal device, it is configured to perform the actions performed by the terminal device in the embodiment shown above Figure 5 In the embodiment shown, for the actions performed by the terminal device, the transceiver unit 710 is configured to: receive a first synchronization signal block from the network device, where the first synchronization signal block includes first indication information, and the first indication information is used to indicate the cell type of the first cell, and the first cell is the cell defined by the 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; where the first synchronization signal block is a synchronization signal block of an undefined cell, and the second synchronization signal block is a synchronization signal block of a defined cell; the processing unit 720 is configured 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.

[0234] Optionally, the type of the terminal device is the first type of terminal device or the second type of terminal device, and the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0235] Optionally, the cell type includes: the cell that supports the residence of the first type of terminal device, the cell that supports the residence of the second type of terminal device, and the cell that simultaneously supports the residence of the first type of terminal device and the second type of terminal device.

[0236] Optionally, the processing unit 720 is configured to: search for a synchronization signal block in the frequency domain at a preset step size, and the synchronization signal block is the first synchronization signal block.

[0237] As another design, when the communication device 700 is a network device, it is configured to perform the actions performed by the network device in the embodiment shown above Figure 5In the embodiment shown, for the actions performed by the network device, the transceiver unit 710 is configured to: send a first synchronization signal block to the terminal device, where the first synchronization signal block includes first indication information for indicating the cell type of a first cell, and the first cell is the cell defined by a second synchronization signal block; the first synchronization signal block includes second indication information for indicating the position of the second synchronization signal block; wherein, the first synchronization signal block is a synchronization signal block of an undefined cell, and the second synchronization signal block is a synchronization signal block of a defined cell.

[0238] Optionally, the cell type includes: a cell supporting the residence of a first type of terminal device, a cell supporting the residence of a second type of terminal device, and a cell supporting the residence of both the first type of terminal device and the second type of terminal device, where the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0239] As another design, when the communication device 700 is a terminal device, it is configured to perform the actions performed by the terminal device in the embodiment shown above Figure 6 The transceiver unit 710 is configured to: receive third indication information sent by the network device, where the third indication information includes a first prohibition parameter and a second prohibition parameter, and the first prohibition parameter is used for the first type of terminal device to perform initial access to the first cell, and the second prohibition parameter is used for the 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 processing unit 720 is configured to determine whether to use the first prohibition parameter or the second prohibition parameter according to the type of the terminal device.

[0240] As another design, when the communication device 700 is a network device, it is configured to perform the actions performed by the network device in the embodiment shown above Figure 6 The transceiver unit 710 is configured to: send third indication information to the terminal device, where the third indication information includes a first prohibition parameter and a second prohibition parameter, and the first prohibition parameter is used for the first type of terminal device to perform initial access to the first cell, and the second prohibition parameter is used for the second type of terminal device to perform initial access to the first cell, where the bandwidth capabilities of the first type of terminal device and the second type of terminal device are different.

[0241] Figure 7 The processing unit 720 in the above can be implemented by a processor or a processor-related circuit. The transceiver unit 710 can be implemented by a transceiver or a transceiver-related circuit. The transceiver unit 710 can also be referred to as a communication unit or a communication interface. The storage unit can be implemented by a memory.

[0242] As Figure 8As shown in the figure, an 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 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.

[0243] Optionally, the communication device 800 includes one or more processors 810.

[0244] Optionally, as Figure 8 shown in the figure, the communication device 800 may further include a memory 820.

[0245] Optionally, the communication device 800 includes one or more memories 820.

[0246] Optionally, the memory 820 may be integrated with the processor 810 or separately provided.

[0247] Optionally, as Figure 8 shown in the figure, 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.

[0248] As a solution, the communication device 800 is used to implement the operations performed by the terminal device in the above method embodiment.

[0249] For example, the processor 810 is used to implement the operations related to processing performed by the terminal device in the above method embodiment, and the transceiver 830 is used to implement the operations related to receiving and sending performed by the terminal device in the above method embodiment.

[0250] As another solution, the communication device 800 is used to implement the operations performed by the network device in the above method embodiment.

[0251] For example, the processor 810 is used to implement the operations related to processing performed by the network device in the above method embodiment, and the transceiver 830 is used to implement the operations related to receiving and sending performed by the network device in the above method embodiment.

[0252] An embodiment of the present application further provides a communication device 900. The communication device 900 may be a terminal device or a chip. The communication device 900 may be used to execute the operations performed by the terminal device in the above method embodiment. When the communication device 900 is a terminal device, Figure 9 shows a schematic structural diagram of a simplified terminal device. For the convenience of understanding and illustration, Figure 9 in the figure, the terminal device takes a mobile phone as an example. AsFigure 9 As shown in the figure, 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, control the terminal device, execute software programs, process data of software programs, etc. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion between baseband signals and radio frequency signals and the processing of radio frequency signals. The antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves. The input / output device, such as a touch screen, a display screen, a keyboard, etc., is mainly used to receive data input by the user and output data to the user. It should be noted that some types of terminal devices may not have an input / output device.

[0253] When data needs to be sent, after the processor performs baseband processing on the data to be sent, it outputs a baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency 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 the sake of convenience of explanation, Figure 9 only one memory and one 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 can also be referred to as a storage medium or a storage device, etc. The memory can be set independently of the processor or integrated with the processor. The embodiments of the present application do not limit this.

[0254] In the embodiments 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 functions can be regarded as the processing unit of the terminal device.

[0255] As Figure 9 shown in the figure, the terminal device includes a transceiver unit 910 and a processing unit 920. The transceiver unit 910 can also be referred to as a transceiver, a transceiver, a transceiver device, etc. The processing unit 920 can also be referred to as a processor, a processing board, a processing module, a processing device, etc.

[0256] Optionally, the device in the transceiver unit 910 for realizing the receiving function can be regarded as the receiving unit, and the device in the transceiver unit 910 for realizing the sending function can be regarded as the sending unit, that is, the transceiver unit 910 includes a receiving unit and a sending unit. The transceiver unit can sometimes also be referred to as a transceiver, a transceiver, or a transceiver circuit, etc. The receiving unit can sometimes also be referred to as a receiver, a receiver, or a receiving circuit, etc. The sending unit can sometimes also be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0257] For example, in one implementation, the transceiver unit 910 is used to execute Figures 4 to 6The receiving operation of the terminal device therein. The processing unit 920 is used to execute Figures 4 to 6 The processing actions on the terminal device side in

[0258] It should be understood that Figure 9 By way of example only and not limitation, the above terminal device including a transceiver unit and a processing unit may not depend on Figure 9 The structure shown.

[0259] When the communication device 900 is a chip, the chip includes a transceiver unit and a processing unit. Among them, the transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor, a microprocessor, or an integrated circuit integrated on the chip.

[0260] An embodiment of the present application further provides a communication device 1000, which may be a network device or a chip. The communication device 1000 may be used to execute the operations performed by the network device in the above method embodiments.

[0261] When the communication device 1000 is a network device, for example, it is a base station. Figure 10 A simplified schematic diagram of the base station structure is shown. The base station includes a part 1010 and a part 1020. The part 1010 is mainly used for the transceiver of radio frequency signals and the conversion between radio frequency signals and baseband signals; the part 1020 is mainly used for baseband processing and controlling the base station, etc. The part 1010 is usually called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc. The part 1020 is usually the control center of the base station and is usually called a processing unit, which is used to control the base station to execute the processing operations on the network device side in the above method embodiments.

[0262] The transceiver unit of the part 1010, which may also be called a transceiver or a transceiver, etc., includes an antenna and a radio frequency circuit, where the radio frequency circuit is mainly used for radio frequency processing. Optionally, the devices used to implement the receiving function in the part 1010 can be regarded as a receiving unit, and the devices used to implement the sending function can be regarded as a sending unit, that is, the part 1010 includes a receiving unit and a sending unit. The receiving unit may also be called a receiver, a receiver, or a receiving circuit, etc., and the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.

[0263] The part 1020 may include one or more single boards, and each single board may include one or more processors and one or more memories. The processor is used to read and execute the programs in the memory to implement the baseband processing function and the control of the base station. If there are multiple single boards, the single boards can be interconnected to enhance the processing ability. As an optional implementation manner, it may also be that multiple single boards share one or more processors, or multiple single boards share one or more memories, or multiple single boards share one or more processors at the same time.

[0264] For example, in one implementation, the transceiver unit of the 1010 part is used to execute Figures 4 to 6 the transceiver-related steps performed by the network device in the illustrated embodiment; the 1020 part is used to execute Figures 4 to 6 the processing-related steps performed by the network device in the illustrated embodiment.

[0265] It should be understood that Figure 10 merely by way of example and not limitation, the above network device including the transceiver unit and the processing unit may not depend on Figure 10 the structure shown.

[0266] When the communication device 1000 is a chip, the chip includes a transceiver unit and a processing unit. Among them, the transceiver unit may be an input / output circuit, a communication interface; the processing unit is a processor, a microprocessor, or an integrated circuit integrated on the chip.

[0267] The embodiments of the present application also provide a computer-readable storage medium, on which computer instructions for implementing the methods executed by the terminal device or the network device in the above method embodiments are stored.

[0268] For example, when the computer program is executed by a computer, the computer can implement the methods executed by the terminal device or the network device in the above method embodiments.

[0269] The embodiments of the present application also provide a computer program product containing instructions, and when the instructions are executed by a computer, the computer implements the methods executed by the terminal device or the network device in the above method embodiments.

[0270] The embodiments of the present application also provide a communication system, which includes the network device and the terminal device in the above embodiments.

[0271] As an example, the communication system includes: the network device and the terminal device in the embodiments described above in combination with Figures 4 to 6 the description.

[0272] For the explanations and beneficial effects of the relevant content in any of the above-mentioned communication devices, reference may be made to the corresponding method embodiments provided above, and details are not described herein again.

[0273] 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 top of 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 referred to as main memory). The operating system in the operating system layer may be any one or more computer operating systems that implement service processing through processes. For example, the Linux operating system, the Unix operating system, the Android operating system, the iOS operating system, or the Windows operating system, etc. The application layer may include applications such as a browser, an address book, a word processing software, and an instant messaging software.

[0274] The embodiments of the present application do not particularly limit the specific structure of the execution subject of the method provided by the embodiments of the present application. As long as it can communicate according to the method provided by the embodiments of the present application by running a program that records the code of the method provided by the embodiments of the present application. For example, the execution subject of the method provided by 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 the program.

[0275] Aspects or features of the present application may be implemented as a method, an apparatus, or an article of manufacture using standard programming and / or engineering techniques. The term "article of manufacture" as used herein may cover a computer program accessible from any computer-readable device, carrier, or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (such as hard disks, floppy disks, or magnetic tapes, etc.), optical discs (such as compact discs (CDs), digital versatile discs (DVDs), etc.), smart cards, and flash memory devices (such as erasable programmable read-only memories (EPROMs), cards, sticks, or key drives, etc.).

[0276] 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 media" may include, but is not limited to: wireless channels and various other media that can store, contain, and / or carry instructions and / or data.

[0277] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0278] 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 ROM (PROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM). For example, the RAM may be used as an external cache. By way of example and not limitation, the RAM may include the following various 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 random access memory (DR RAM).

[0279] 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) may be integrated in the processor.

[0280] It should also be noted that the memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.

[0281] Those of ordinary skill in the art can realize that the units and steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the protection scope of this application.

[0282] 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 foregoing method embodiments, and will not be elaborated herein.

[0283] In several embodiments provided in this 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 merely illustrative. For example, the division of the units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical or other forms.

[0284] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place, or can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0285] In addition, the functional units in each embodiment of this application can be integrated into one unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0286] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using 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 processes or functions described in the embodiments of the present invention are 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. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more integrated available media. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD), etc.). For example, the foregoing available media can include, but are not limited to: USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs and other media that can store program codes.

[0287] As described above, the foregoing are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A communication method, characterized in that, Comprising: Receiving third indication information, where the third indication information includes a first cell barred parameter or a second cell barred parameter. Among them, the first cell barred parameter is used by a first type of terminal device to determine whether it can camp on a first cell, and the second cell barred parameter is used by a second type of terminal device to determine whether it can camp on the first cell; the number of antennas of the first type of terminal device and the second type of terminal device is different.

2. The method according to claim 1, wherein The first type of terminal device and the second type of terminal device satisfy at least one of the following; 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 further includes intraFreqReselection, and the intraFreqReselection indicates whether to allow the terminal device to reselect to other cells with the same frequency as the first cell.

4. The method according to any one of claims 1-3, wherein If the terminal device is the first type of terminal device, the terminal device uses the first cell barred parameter to further determine whether it can camp on the first cell.

5. The method according to any one of claims 1-4, wherein If the terminal device is the second type of terminal device, the terminal device uses the second cell barred parameter to further determine whether it can camp on the first cell.

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

7. A communication method, characterized in that Comprising: Transmitting third indication information, where the third indication information includes a first cell barred parameter and a second cell barred parameter. Among them, the first cell barred parameter is used by a first type of terminal device to determine whether it can camp on a first cell, and the second cell barred parameter is used by a second type of terminal device to determine whether it can camp on the first cell, where the number of antennas of the first type of terminal device and the second type of terminal device is different.

8. The method according to claim 7, wherein The first type of terminal device and the second type of terminal device satisfy at least one of the following; 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 further includes intraFreqReselection, and the intraFreqReselection indicates whether to allow the terminal device to reselect to other cells with the same frequency as the first cell.

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

11. A communication device, characterized in that, Comprising a processor, the processor is coupled to a memory, the memory is used to store computer programs or instructions, and the processor is used to execute the computer programs or instructions in the memory, so that the method according to any one of claims 1 to 6 is executed.

12. A communication device, characterized in that, Comprising a processor, the processor being coupled to a memory for storing a computer program or instructions, the processor being configured to execute the computer program or instructions in the memory such that the method according to any one of claims 7 to 10 is performed.

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

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

15. A chip system, characterized in that, Comprising: A processor for calling and running a computer program from a memory such that a communication device equipped with the chip system performs the method according to any one of claims 1 to 6 or the method according to any one of claims 7 to 10.

16. A computer program product, characterized in that, The computer program product contains instructions, and when the instructions are run by a computer, the method according to any one of claims 1 to 6 is performed, or the method according to any one of claims 7 to 10 is performed.

17. A communication system, characterized in that, Comprising a communication device according to claim 11, and comprising a communication device according to claim 12.

Images