Method and apparatus for accessing a cell

Abstract

The application provides a method and device for accessing a cell. A terminal device can receive RMSI and BWP information of a cell of a second carrier through a cell of a first carrier, and then can obtain information for accessing the cell of the second carrier based on the RMSI and the BWP information, so as to access the cell of the second carrier, without first accessing the cell of the first carrier and then switching to the cell of the second carrier, which helps to realize fast access to the cell of the second carrier and guarantees service and performance of the terminal device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication, and more particularly, to a method and apparatus for accessing a cell. BACKGROUND

[0002] To meet the demand for higher service rates, the concept of carrier aggregation (CA) is introduced, that is, by aggregating multiple continuous or non-continuous component carriers (CCs) into a larger bandwidth, the uplink and downlink transmission rates are effectively improved to meet the demand for higher service rates. Each CC for CA is embodied as an independent cell with its own independent cell ID.

[0003] The base station periodically broadcasts common signaling on the carrier. The terminal acquires relevant information of the cell for accessing the cell by receiving the common signaling broadcast by the base station. Currently, when the terminal is in the coverage of the carrier in the energy saving state, it can only access the cell without the carrier in the energy saving state first, and then switch from the cell without the carrier in the energy saving state to the cell with the carrier in the energy saving state. This will cause the terminal to access the cell with the carrier in the energy saving state for too long, and cannot guarantee the service and performance. SUMMARY

[0004] Therefore, the present application provides a method and apparatus for accessing a cell, which helps to guarantee the service and performance of the terminal device.

[0005] In a first aspect, a method for accessing a cell is provided. The method can be executed by a terminal device or an apparatus (such as one or more of a chip, a processor, or a chip system) in the terminal device. For ease of description, the following describes the execution of the terminal device. The method includes: first, the terminal device receives a first message through a cell of a first carrier, the first message including remaining minimum system information (RMSI) of a cell of a second carrier and a first indication, the first indication indicating information of a first bandwidth part (BWP); then, the terminal device determines the first BWP through the first indication; finally, the terminal device accesses the cell of the second carrier according to the first BWP and the RMSI.

[0006] In the embodiments of the present application, the terminal device can acquire relevant information of the cell of the second carrier through the cell of the first carrier, so as to access the cell of the second carrier, without first accessing the cell of the first carrier and then switching to the cell of the second carrier, which helps to realize fast access to the cell of the second carrier and guarantees the service and performance of the terminal device.

[0007] Optionally, the cell of the first carrier is not in the power saving state, and the cell of the second carrier is in the power saving state. Therefore, the terminal device can obtain the access-related information of the cell of the carrier in the power saving state through the cell of the carrier not in the power saving state.

[0008] In a possible implementation, the first message further includes identification information of the cell of the second carrier; and the terminal device accesses the cell of the second carrier according to the first BWP, the RMSI, and the identification information. For example, the identification information is a PCI. Since the cell of the second carrier does not broadcast an SSB, the terminal device can further obtain the PCI of the cell of the second carrier through the first message, thereby avoiding the problem that the PCI cannot be obtained due to the fact that the cell of the second carrier does not broadcast an SSB.

[0009] The terminal device can determine the frequency position of the first BWP based on the first indication, and then send a sequence in the first BWP to start the access request process. The first indication can directly or indirectly indicate the first BWP.

[0010] Optionally, the first indication includes frequency information of the second carrier and a frequency offset of the first BWP; or the first indication includes frequency information of an SSB of the cell of the second carrier, a first parameter, and a frequency offset of the first BWP, the first parameter being used to determine a starting frequency position of the bandwidth of the second carrier; or the first indication includes a frequency position of the first BWP. Here, the terminal device can obtain the frequency position of the first BWP in different indication manners of the first indication, which is more flexible.

[0011] In a possible implementation, the method further includes that the terminal device receives a second indication through the cell of the first carrier, the second indication being used to indicate that the cell of the first carrier broadcasts the first message, and the second indication being carried in a master information block (MIB) or a system information block (SIB). Therefore, the terminal device can know whether the first message is broadcast in the cell of the first carrier through the second indication, that is, whether there is a broadcast message including the system message of the second carrier in the cell of the first carrier.

[0012] In a second aspect, a method for accessing a cell is provided. The method can be performed by a network device or an apparatus (e.g., one or more of a chip, a processor, or a chip system) in the network device. For ease of description, the method is described below by taking the network device as an example. The method includes: generating, by the network device, a first message, the first message including remaining minimum system information (RMSI) of a cell of a second carrier and a first indication, the first indication being used to indicate information of a first bandwidth part (BWP); and broadcasting, by the network device, the first message through a first carrier.

[0013] In the embodiment of the present application, the network device broadcasts the RMSI of the second carrier and the first indication through the cell of the first carrier, so that the terminal device can obtain the relevant information of the cell of the second carrier through the cell of the first carrier, so as to access the cell of the second carrier, without first accessing the cell of the first carrier and then switching to the cell of the second carrier, which helps to realize fast access to the cell of the second carrier and ensures the service and performance of the terminal device.

[0014] Optionally, the cell of the first carrier is not in the energy saving state, and the cell of the second carrier is in the energy saving state. Therefore, the network device can broadcast the RMSI of the cell of the second carrier in the energy saving state through the cell of the first carrier which is not in the energy saving state and the first indication.

[0015] Optionally, the first message further includes identification information of the cell of the second carrier. For example, the identification information is PCI. Since the cell of the second carrier does not broadcast SSB, the terminal device can also obtain the PCI of the cell of the second carrier through the first message, avoiding the problem that the PCI cannot be obtained due to the fact that the cell of the second carrier does not broadcast SSB.

[0016] The first indication can directly indicate or indirectly indicate the first BWP, so that the terminal device determines the frequency point position of the first BWP according to the first indication. Optionally, the first indication includes frequency point information of the second carrier and a frequency offset of the first BWP; or the first indication includes frequency point information of SSB of the cell of the second carrier, a first parameter used to determine the starting frequency point position of the bandwidth of the second carrier, and a frequency offset of the first BWP; or the first indication includes the frequency point position of the first BWP.

[0017] In a possible implementation, the method further includes: broadcasting, by the network device, a second indication through the first carrier, the second indication being carried in a master information block (MIB) or a system information block (SIB), and the second indication being used to indicate that the cell of the first carrier broadcasts the first message. Therefore, the network device can also broadcast the second indication through the cell of the first carrier, so that the terminal device can know whether the first message is broadcast in the cell of the first carrier, that is, whether there is a broadcast message containing the system message of the second carrier in the cell of the first carrier.

[0018] In a third aspect, a method for accessing a cell is provided. The method can be performed by a terminal device or by an apparatus (e.g., one or more of a chip, a processor, or a chip system) in the terminal device. For ease of description, the method is described below as being performed by a terminal device. The method includes: first, the terminal device receives a second message from a cell of a first carrier, the second message including remaining minimum system information (RMSI) of a cell of a second carrier and information of a synchronization signal block (SSB) of the cell of the second carrier; and the terminal device accesses the cell of the second carrier according to the RMSI and the information of the SSB.

[0019] In the embodiments of the present application, the terminal device can obtain the RMSI and the information of the SSB of the cell of the second carrier from the cell of the first carrier, and access the cell of the second carrier according to the information of the SSB and the RMSI. This does not require the terminal device to access the cell of the second carrier by switching, and thus can achieve fast access to the cell of the second carrier, reduce the time delay of accessing the cell of the second carrier, and ensure the service and performance of the terminal device.

[0020] Optionally, the terminal device detects the SSB according to the information of the SSB. Thus, after obtaining the information of the SSB, the terminal device can detect the SSB based on the information of the SSB, which can more accurately and flexibly search for the SSB, reduce unnecessary detection, reduce energy consumption, and avoid failure of the terminal device to detect the SSB.

[0021] Optionally, the cell of the first carrier is not in an energy-saving state, and the cell of the second carrier is in an energy-saving state. Thus, the terminal device can obtain the RMSI and the information of the SSB of the cell of the second carrier in the energy-saving state from the cell of the first carrier that is not in the energy-saving state.

[0022] Optionally, the information of the SSB includes one or more of the following: a period of the SSB, a frequency point of the SSB, and a carrier interval of the SSB.

[0023] Optionally, the second message further includes identification information of the cell of the second carrier; and the terminal device accesses the cell of the second carrier according to the RMSI, the SSB, and the identification information. Thus, the terminal device can know which cell to access by using the identification information (e.g., a PCI) of the cell of the second carrier.

[0024] In a possible implementation, the method further includes: receiving, by the terminal device, a third indication through the cell of the first carrier, the third indication being used to indicate that the cell of the first carrier broadcasts the second message, and the third indication being carried in a master information block (MIB) or a system information block (SIB). Thus, by introducing the third indication, the terminal device can learn, through the third indication, whether the second message is broadcast in the cell of the first carrier, that is, whether there is a broadcast message containing the system message of the second carrier in the cell of the first carrier.

[0025] In a fourth aspect, a method of accessing a cell is provided, which can be performed by a network device or by an apparatus (such as one or more of a chip, a processor, or a chip system) in the network device. For ease of description, the following is described by way of example with the network device performing the method. The method includes: generating, by the network device, a second message, the second message including remaining minimum system information (RMSI) of a cell of a second carrier and information of a synchronization signal block (SSB) of the cell of the second carrier; and broadcasting, by the network device, the second message through a cell of a first carrier.

[0026] In the embodiments of the present application, the network device broadcasts the RMSI of the cell of the second carrier and the information of the SSB through the cell of the first carrier, so that the terminal device can perform SSB detection according to the information of the SSB and access the cell of the second carrier according to the SSB and the RMSI, without the need to access the cell of the second carrier through switching, thereby achieving fast access to the cell of the second carrier, reducing the time delay of accessing the cell of the second carrier, and ensuring the service and performance of the terminal device.

[0027] Optionally, the cell of the first carrier is not in an energy-saving state, and the cell of the second carrier is in an energy-saving state. Thus, the network device can broadcast the RMSI of the cell of the second carrier and the information of the SSB through the cell of the first carrier which is not in an energy-saving state.

[0028] Optionally, the information of the SSB includes one or more of the following: a period of the SSB, a frequency point of the SSB, and a carrier interval of the SSB.

[0029] Optionally, the second message further includes identification information of the cell of the second carrier. In this way, the terminal device can learn which cell to access through the identification information (such as a PCI) of the cell of the second carrier.

[0030] In a possible implementation, the method further includes: broadcasting, by the network device, a third indication through the first carrier, the third indication being used to indicate that the cell of the first carrier broadcasts the second message, and the third indication being carried in a master information block (MIB) or a system information block (SIB). Thus, the network device can also broadcast the third indication through the cell of the first carrier, so as to facilitate the terminal device to learn whether the second message is broadcast in the cell of the first carrier.

[0031] In a fifth aspect, a communication apparatus is provided, which includes a unit for performing the method in the first aspect or any possible implementation of the first aspect; or a unit for performing the method in the second aspect or any possible implementation of the second aspect; or a unit for performing the method in the third aspect or any possible implementation of the third aspect; or a unit for performing the method in the fourth aspect or any possible implementation of the fourth aspect.

[0032] In a sixth aspect, a device for accessing a cell is provided, which includes a processor. The processor is coupled with a memory and is configured to execute instructions in the memory to implement the method in the first aspect or any possible implementation of the third aspect. Optionally, the device further includes the memory. Optionally, the device further includes a communication interface, and the processor is coupled with the communication interface.

[0033] In an implementation, the device is a terminal device. When the device is a terminal device, the communication interface can be a transceiver, or an input / output interface.

[0034] In another implementation, the device is a chip configured in a terminal device. When the device is a chip configured in a terminal device, the communication interface can be an input / output interface.

[0035] Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0036] In a seventh aspect, a device for accessing a cell is provided, which includes a processor. The processor is coupled with a memory and is configured to execute instructions in the memory to implement the method in the second aspect or any possible implementation of the fourth aspect. Optionally, the device further includes the memory. Optionally, the device further includes a communication interface, and the processor is coupled with the communication interface.

[0037] In an implementation, the device is a network device. When the device is a network device, the communication interface can be a transceiver, or an input / output interface.

[0038] In another implementation, the apparatus is a chip configured in a network device. When the apparatus is a chip configured in a network device, the communication interface can be an input / output interface.

[0039] Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0040] In an eighth aspect, a processor is provided, comprising 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 performs the method in any possible implementation of any one of the first aspect to the fourth aspect.

[0041] In a specific implementation, the processor can be a chip, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a flip-flop, and various logic circuits, etc. The input signal received by the input circuit can be received and input by, for example but not limited to, a receiver, the output signal output by the output circuit can be output to and transmitted by, for example but not limited to, a transmitter, and the input circuit and the output circuit can be the same circuit which is used as the input circuit and the output circuit at different times. The embodiments of the present application do not limit the specific implementation of the processor and various circuits.

[0042] In a ninth aspect, an apparatus is provided, comprising a processor and a memory. The processor is configured to read instructions stored in the memory, and can receive a signal through a receiver and transmit a signal through a transmitter to perform the method in any possible implementation of any one of the first aspect to the fourth aspect.

[0043] Optionally, the processor is one or more, and the memory is one or more.

[0044] Optionally, the memory can be integrated with the processor, or the memory and the processor can be separately arranged.

[0045] In a specific implementation, the memory can be a non-transitory memory, for example, a read only memory (ROM), which can be integrated with the processor on the same chip, or can be separately arranged on different chips. The embodiments of the present application do not limit the type of memory and the arrangement of the memory and the processor.

[0046] It should be understood that the relevant data interaction process, such as sending information, can be a process of outputting information from the processor, and receiving information can be a process of receiving input information by the processor. Specifically, the processed output data can be output to the transmitter, and the input data received by the processor can come from the receiver. Among them, the transmitter and the receiver can be collectively referred to as a transceiver.

[0047] The device in the ninth aspect described above can be a chip, and the processor can be implemented by hardware or software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc. When implemented by software, the processor can be a general-purpose processor, which realizes by reading software codes stored in a memory. The memory can be integrated in the processor or exist independently outside the processor.

[0048] In a tenth aspect, a computer readable storage medium is provided, which stores a computer program or instructions. When the computer program or instructions are executed, the method in any possible implementation manner of any one of the first aspect to the fourth aspect is implemented.

[0049] In an eleventh aspect, a computer program product containing instructions is provided. When the instructions are executed, the method in any possible implementation manner of any one of the first aspect to the fourth aspect is implemented.

[0050] In a twelfth aspect, a communication chip is provided, which stores instructions. When the instructions are executed on a computer device, the communication chip is caused to perform the method in the first aspect or any possible implementation manner of the first aspect, or the communication chip is caused to perform the method in the third aspect or any possible implementation manner of the third aspect.

[0051] In a thirteenth aspect, a communication chip is provided, which stores instructions. When the instructions are executed on a computer device, the communication chip is caused to perform the method in the second aspect or any possible implementation manner of the second aspect, or the communication chip is caused to perform the method in the fourth aspect or any possible implementation manner of the fourth aspect.

[0052] In a fourteenth aspect, a communication system is provided, which includes a terminal device and a network device.

[0053] Optionally, the communication system further includes other devices in communication with the terminal device and / or the network device. BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 FIG. 1 is a schematic diagram of an architecture of a communication system to which embodiments of the present application can be applied;

[0055] Figure 2is a schematic interaction diagram of a method for accessing a cell according to an embodiment of the present application;

[0056] Figure 3 is an example diagram in which an embodiment of the present application is applied;

[0057] Figure 4 is a schematic interaction diagram of a method for accessing a cell according to another embodiment of the present application;

[0058] Figure 5 is a schematic block diagram of an apparatus for accessing a cell provided by an embodiment of the present application;

[0059] Figure 6 is a structural schematic diagram of a terminal device provided by an embodiment of the present application;

[0060] Figure 7 is a structural schematic diagram of a network device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0061] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0062] In the embodiments of the present application, "multiple" can be understood as "at least two", and "multiple items" can be understood as "at least two items".

[0063] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as a long term evolution (LTE) system, a new radio (NR) system in a fifth generation (5G) mobile communication system, and a future mobile communication system.

[0064] Figure 1 is a structural schematic diagram of a mobile communication system to which an embodiment of the present application is applied. As shown in the figure, the mobile communication system includes a core network device 110, at least one (such as a wireless access network device 120 and a wireless access network device 121) wireless access network device, and at least one (such as a terminal device 130 and a terminal device 140) terminal device. The terminal device is connected to the wireless access network device in a wireless manner, and the wireless access network device is connected to the core network device in a wireless or wired manner. The core network device and the wireless access network device can be independent and different physical devices, can be integrated on the same physical device, or can be a physical device integrated with part of the functions of the core network device and part of the functions of the wireless access network device. The terminal device can be fixed or mobile. Figure 1 Figure 1 Figure 1 Figure 1 ​​​Just as an illustration, other network devices can also be included in the communication system, such as wireless relay devices and wireless backhaul devices, which are not shown in Figure 1 Embodiments of the present application do not limit the number of core network devices, wireless access network devices and terminal devices included in the mobile communication system.

[0065] Figure 1 The wireless access network device in the mobile communication system can correspond to one or more carriers, i.e. can communicate through one or more carriers, for which no limitation is made.

[0066] A radio access network (RAN) device is an access device through which a terminal device accesses the mobile communication system by wireless means. The RAN device can be one or more of a base station NodeB, an evolved NodeB (eNB), a next generation NodeB (gNB) in a 5G mobile communication system, a transmission point, a base station in a future mobile communication system, an access node in a Wi-Fi system, one or more antenna panels of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU). Embodiments of the present application do not limit the specific technology and specific device form adopted by the RAN device. In some deployments, a gNB can include a central unit (CU) and a DU, and the CU and the DU respectively implement part of the functions of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, implements the functions of the radio resource control (RRC) layer and the packet data convergence protocol (PDCP) layer. The DU is responsible for processing the physical layer protocol and real-time services, and implements the functions of the radio link control (RLC) layer, the media access control (MAC) layer and the physical (PHY) layer. The gNB can also include an active antenna unit (AAU). The AAU implements part of the physical layer processing function, the radio frequency processing and the related functions of the active antenna. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, in this architecture, high-layer signaling such as RRC layer signaling can also be considered as being sent by the DU, or by the DU+AAU. It can be understood that the network device can be a device including one or more of a CU node, a DU node and an AAU node. In addition, the CU can be a network device in the access network or a network device in the core network (CN), and the present application does not limit this.

[0067] The terminal device can also be referred to as a terminal, a user equipment (UE), a mobile station, a mobile terminal, etc. The terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality terminal device, an augmented reality terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned operation, a wireless terminal in remote surgery, a wireless terminal in smart power grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Embodiments of the present application do not limit the specific technology and specific device form of the terminal device.

[0068] The wireless access network device and the terminal device can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on water surface; can also be deployed on aircraft, balloons and satellites in the air. Embodiments of the present application do not limit the application scenarios of the wireless access network device and the terminal device.

[0069] The wireless access network device and the terminal device can communicate with each other through licensed spectrum, can also communicate through unlicensed spectrum, and can also communicate through licensed spectrum and unlicensed spectrum at the same time. The wireless access network device and the terminal device can communicate with each other through spectrum below 6 gigahertz (GHz), can also communicate through spectrum above 6 GHz, and can also communicate through spectrum below 6 GHz and spectrum above 6 GHz at the same time. Embodiments of the present application do not limit the spectrum resources used between the wireless access network device and the terminal device.

[0070] In the embodiments of the present application, the network device refers to a radio access network device if not specially stated. The terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes a central processing unit (CPU), a memory management unit (MMU), a memory (also referred to as a main memory), and the like. The operating system can be any one or more computer operating systems that implement business processing through a process, for example, a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system, and the like. The application layer includes a browser, a contact list, word processing software, instant messaging software, and the like. Moreover, the embodiments of the present application do not specially limit the specific structure of the execution subject of the method provided in the embodiments of the present application, as long as the execution subject can communicate according to the method provided in the embodiments of the present application by running a program in which the code of the method provided in the embodiments of the present application is recorded, for example, the execution subject of the method provided in the embodiments of the present application can be a terminal device or a network device, or a functional module capable of calling and executing a program in the terminal device or the network device.

[0071] In addition, various aspects or features of the disclosure can be realized as methods, apparatus, or articles of manufacture using standard programming and / or engineering techniques. The term "article of manufacture" as used in the application encompasses any computer program in any computer-readable medium, which can be accessed by a computer. For example, the computer-readable medium can include, but is not limited to: magnetic storage devices (e.g., hard disk, floppy disk, or magnetic tape); optical storage devices (e.g., compact disk (CD), digital versatile disk (DVD), etc.); smart cards; and flash memory devices (e.g., EPROM, card, stick, or key drive, etc.). In addition, the various storage media described herein can represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" can include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0072] Before introducing the embodiments of the present application, in order to facilitate understanding, the terms or concepts related to the embodiments of the present application are simply explained.

[0073] One carrier can correspond to one or more cells. The network device of the cell can broadcast system messages.

[0074] The common broadcast message (or common broadcast signaling) of the carrier includes at least a synchronization signal and PBCH block (SSB), remaining minimum system information (RMSI), and a paging signal. The carrier in the energy saving state can not send the SSB, the RMSI, and the paging signal; or the carrier in the energy saving state can only send the SSB and not send the RMSI and the paging signal. The cell of the carrier in the energy saving state can be scheduled to send data at any time. However, because the cell of the carrier in the energy saving state does not send the RMSI, the terminal device cannot obtain sufficient information, thereby causing the terminal device to be unable to access the cell of the carrier in the energy saving state through an initial access process. That is, if the carrier is in the energy saving state or implements the energy saving measure, for example, the cell of the carrier in the energy saving state does not send the common broadcast message or only sends the SSB, the terminal device cannot receive the common broadcast message of the cell of the carrier in the energy saving state, cannot obtain the related information (for example, a system information block (SIB) 1) of accessing the cell of the carrier in the energy saving state, and cannot access the cell of the carrier in the energy saving state.

[0075] Generally, the carrier in the energy saving state can be a high-frequency large-bandwidth carrier; and the carrier not in the energy saving state can be a low-frequency wide-coverage carrier.

[0076] Synchronization signal block SSB: a synchronization signal and a physical broadcast channel (PBCH) constitute a SSB. The SSB is periodically sent.

[0077] The synchronization signal includes a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). The synchronization signal is used for time-frequency synchronization. Among them, the cell signal quality such as (RSRP / RSRQ / RS-SINR) measurement is mainly measured through the SSS signal.

[0078] Master information block (MIB): a main broadcast information block located on the PBCH of the SSB.

[0079] RMSI is a necessary system message for terminal device in access process. RMSI is periodically transmitted, and the period thereof is aligned with SSB period. RMSI includes system information block SIB1. SIB1 mainly contains cell configuration information, cell selection information, access information, system information scheduling information, and the like.

[0080] The following describes the method for accessing a cell according to an embodiment of the present application. Figures 2 to 4 The method for accessing a cell according to an embodiment of the present application is described.

[0081] Figure 2 FIG. 2 is a schematic flowchart of the method 200 for accessing a cell according to an embodiment of the present application. Figure 2 The method can be applied to a case where one network device corresponds to two carriers. Exemplarily, Figure 2 The network device in the method can be Figure 1 The wireless access network device 120 in the method can be Figure 1 The terminal device 140 in the method can be Figure 2 As shown in FIG. 2, the method 200 includes the following steps.

[0082] In S210, the terminal device receives a first message through a cell of a first carrier, the first message including remaining minimum system information RMSI of a cell of a second carrier and a first indication, the first indication being used to indicate information of a first bandwidth part BWP.

[0083] The network device can broadcast the first message in the cell of the first carrier. Correspondingly, the terminal device receives the first message in the cell of the first carrier.

[0084] Here, it is uniformly described that the first carrier in the present application is a carrier not in energy saving state, and the second carrier in the present application is a carrier in energy saving state. Correspondingly, the cell of the first carrier is not in energy saving state, and the cell of the second carrier is in energy saving state.

[0085] The first BWP refers to an initial BWP, which is used for information reception before the terminal device accesses the cell of the second carrier. Exemplarily, the first BWP is used for receiving SIB and random access (RA) related information.

[0086] The first message is a broadcast message of the first carrier. The first message can include a common broadcast message corresponding to the cell of the second carrier, for example, the common broadcast message corresponding to the cell of the second carrier is an SIB1 message. The terminal device can obtain the relevant information (or information required by the terminal device to access the cell of the second carrier) of the cell of the second carrier through the broadcast message of the cell of the first carrier, for example, the RMSI of the cell of the second carrier and the first indication. In other words, the RMSI of the inter-frequency cell and the relevant information of the initial BWP of the inter-frequency cell are broadcast in the cell of the first carrier.

[0087] In the embodiments of the present application, the first indication can indicate the first BWP in an indirect indication or direct indication manner, or indicate the first BWP in an implicit indication or explicit indication manner. The terminal device can determine the frequency point position of the first BWP through the first indication.

[0088] In the embodiments of the present application, the first indication can indicate the first BWP in an indirect indication or direct indication manner, or indicate the first BWP in an implicit indication or explicit indication manner. The terminal device can determine the frequency point position of the first BWP through the first indication.

[0088] S220, the terminal device accesses the cell of the second carrier according to the first BWP and the RMSI.

[0089] Specifically, the process of the terminal device accessing the cell of the second carrier includes that the terminal device sends a random access preamble on the first BWP to initiate random access. After sending the preamble on the first BWP, the subsequent process of the terminal device accessing the cell of the second carrier can refer to the random access process in the standard protocol, and specific details are not described here. For example, after sending the preamble, the terminal device receives a random access response message sent by a network device (the network device corresponds to the cell of the second carrier); the terminal device sends a message 3 (Msg3) according to an uplink resource allocated by a message 2 (Msg2); the network device replies an RRC setup message to the terminal device; the terminal device successfully accesses the network device and sends an RRC setup complete message.

[0090] In the embodiments of the present application, the terminal device can obtain the RMSI of the cell of the second carrier and the first indication through the cell of the first carrier, and access the cell of the second carrier according to the first BWP and the RMSI, without accessing the cell of the second carrier through switching, so that the terminal device can quickly access the cell of the second carrier, the time delay of accessing the cell of the second carrier is reduced, and the service and performance of the terminal device are ensured.

[0091] The first indication used to indicate the information of the first BWP can have different implementation manners. The terminal device can determine the frequency point position of the first BWP based on the first indication.

[0092] Manner 1: The first indication includes the frequency point position of the first BWP.

[0093] Specifically, the first indication can directly indicate the frequency point position of the first BWP (i.e., the absolute frequency point of the initial BWP) and the bandwidth. That is, the terminal device can directly obtain the frequency point position of the first BWP through the first indication, and then access the cell of the second carrier using the first BWP and the RMSI.

[0094] Mode 2, the first indication includes the frequency point information of the second carrier and the frequency offset of the first BWP.

[0095] Exemplarily, taking the first BWP as the initial BWP as an example, the first indication includes the following information: the absolute frequency point (or the starting frequency point position) of the second carrier and the frequency offset of the initial BWP. That is, the terminal device obtains the frequency point position of the initial BWP through the starting frequency point position of the second carrier and the frequency offset of the initial BWP.

[0096] Mode 3, the first indication includes the frequency point information of the SSB of the cell of the second carrier, the first parameter for determining the starting frequency point position of the bandwidth of the second carrier, and the frequency offset of the first BWP. For example, the first parameter is K-ssb, which is used to determine the starting position of the carrier bandwidth.

[0097] Exemplarily, the first indication can include the following information: the absolute frequency point of the SSB of the cell of the second carrier, K-ssb, and the frequency offset of the initial BWP. The terminal device determines the starting position of the carrier through the absolute frequency point of the SSB and the parameter K-ssb, and then determines the frequency point position of the initial BWP through the frequency offset of the initial BWP on the basis of the determined starting position of the carrier. After obtaining the frequency point position of the initial BWP, the terminal device accesses the cell of the second carrier using the initial BWP and the RMSI.

[0098] That is, the above-mentioned three modes are all for determining the frequency point position of the first BWP. The terminal device can obtain the first indication from the first message, determine the initial BWP based on the first indication, and start the access request process by sending a sequence (preamble) in the initial BWP.

[0099] It can be understood that the above-mentioned three modes are only exemplarily described and do not constitute a limitation on the embodiments of the present application. In fact, there are other reasonable ways to indicate the first BWP.

[0100] The terminal device can also learn from the cell of the first carrier whether the first message is broadcasted in the cell of the first carrier, i.e., whether the system broadcast message of the cell of the second carrier can be learned from the cell of the first carrier.

[0101] The terminal device can also learn from the cell of the first carrier whether the first message is broadcasted in the cell of the first carrier, i.e., whether the system broadcast message of the cell of the second carrier can be learned from the cell of the first carrier.

[0102] Optionally, the method 200 further includes: S230, the network device broadcasts a second indication through the cell of the first carrier. Correspondingly, the terminal device receives the second indication through the cell of the first carrier. The second indication is used to indicate that the first message is broadcasted in the cell of the first carrier (or, is used to indicate whether the first message exists in the cell of the first carrier, or is used to indicate whether the access information of the cell of the second carrier exists in the cell of the first carrier), and the second indication is carried in a master information block (MIB) or a system information block (SIB). The second indication is carried in the SIB1 or the MIB of the first carrier itself, for example, the second indication can be represented by 1 bit, and when the value is 1, it represents that the first message is broadcasted in the cell of the first carrier, and when the value is 0, it represents that the first message does not exist in the cell of the first carrier. It can be understood that the meaning represented by the bit value here is only an exemplary description, and does not limit the embodiments of the present application.

[0103] Therefore, by introducing the second indication, the terminal device can determine whether the first message is broadcasted in the cell of the first carrier, i.e., whether the broadcast message containing the system message of the second carrier exists. In addition, the introduced second indication can be carried in the broadcast message of the cell of the first carrier itself, avoiding the introduction of new signaling or message, and saving the overhead. Alternatively, the second indication can also be carried in a newly defined message, which is not specifically limited.

[0104] It should be understood that the present application does not specifically limit the execution order of S230 and S210, for example, S230 can be executed before S210.

[0105] In the above embodiments, the first indication is introduced to indicate the first BWP, and the second indication is introduced to indicate whether the first message is broadcasted in the cell of the first carrier. It should be understood that the present application does not specifically limit the indication manner of the first indication and the second indication, and the first indication and the second indication can also be introduced in other manners. Figure 3The example in the foregoing is taken for example, assuming that the first carrier is a low-frequency carrier, such as a frequency of 1.8G, and the second carrier is a high-frequency and large-bandwidth carrier, such as a frequency of 3.5G. The method for accessing a cell according to the present application is as shown in Figure 3 FIG. 2, by broadcasting a first message in the cell of the 1.8G carrier and including initial BWP information of the cell of the 3.5G carrier in the first message. In this way, the terminal device can obtain the initial BWP information of the cell of the 3.5G carrier by receiving the first message broadcast in the cell of the 1.8G carrier, and send a random access preamble in the initial BWP to access the cell of the 3.5G carrier. It should be understood that, Figure 3 The example in the foregoing is taken for example, assuming that the first carrier is a low-frequency carrier, such as a frequency of 1.8G, and the second carrier is a high-frequency and large-bandwidth carrier, such as a frequency of 3.5G. The method for accessing a cell according to the present application is as shown in

[0106] The present application further provides a method for accessing a cell, in which a terminal device obtains RMSI and SSB information of a cell of a second carrier through a cell of a first carrier, so as to access the cell of the second carrier.

[0107] Figure 4 FIG. 3 shows a schematic flowchart of a method 300 for accessing a cell according to an embodiment of the present application. Figure 4 The method 200 can be applied to a case where one network device corresponds to two carriers, or a case where two network devices each correspond to one carrier, and no limitation is made in this regard. Exemplarily, Figure 4 The network device in the foregoing can be Figure 1 the radio access network device 120 or the radio access network device 121 in the foregoing, and the terminal device can be Figure 1 the terminal device 140 in the foregoing. As shown in Figure 4 the method 300 includes the following steps.

[0108] S310, the network device broadcasts a second message in the cell of the first carrier. Correspondingly, the terminal device receives the second message through the cell of the first carrier, and the second message includes RMSI of the cell of the second carrier and information of SSB of the cell of the second carrier.

[0109] The second message can include a common broadcast message corresponding to the cell of the second carrier, such as an SIB1 message. The terminal device can obtain relevant information (or information required by the terminal device for accessing the cell of the second carrier) of the cell of the second carrier, such as the RMSI and the information of the SSB of the cell of the second carrier, through the cell of the first carrier. Different from the first message in the method 200, the second message does not need to carry the first indication, i.e., the information of the first BWP, but carries the information of the SSB. The terminal device performs SSB detection through the information of the SSB, and combines the SIB1 message to obtain the first BWP.

[0110] Optionally, the information of the SSB comprises one or more of the following: a periodicity of the SSB, a frequency point of the SSB, a carrier interval of the SSB. The periodicity of the SSB can be lengthened for energy saving needs, for example, the periodicity of the SSB is 160 ms or higher. Illustratively, the terminal device can perform SSB detection based on the periodicity of the SSB.

[0111] S320, the terminal device detects the SSB according to the information of the SSB.

[0112] For example, the cell of the first carrier is a cell where the wireless access network device 120 is located, and the cell of the second carrier can be a cell where the wireless access network device 121 is located. The cell where the wireless access network device 121 is located broadcasts an SSB, and the terminal device 140 obtains the information of the SSB through the cell where the wireless access network device 120 is located, and searches for the SSB in the cell where the wireless access network device 121 is located, which can more accurately and flexibly search for the SSB, and reduce unnecessary detection.

[0113] In the embodiments of the present application, the cell of the second carrier broadcasts an SSB. After the terminal device obtains the information of the SSB, it can perform detection based on the information of the SSB, which can more accurately and flexibly search for the SSB, reduce unnecessary detection, reduce energy consumption, and avoid failure of the terminal device to detect the SSB.

[0114] S330, the terminal device accesses the cell of the second carrier according to the RMSI and the information of the SSB.

[0115] It should be understood that step S320 can be optional. The terminal device can access the cell of the second carrier according to the RMSI and the information of the SSB.

[0116] If step S320 is included, the terminal device performs step S320 described above to detect the SSB according to the information of the SSB. After the terminal device detects the SSB based on the information of the SSB, it can access the cell of the second carrier according to the SSB and the RMSI.

[0117] In the embodiments of the present application, the terminal device obtains the RMSI of the cell of the second carrier and the information of the SSB through the cell of the first carrier, performs SSB detection according to the information of the SSB, and finally accesses the cell of the second carrier according to the SSB and the RMSI, without the need to access the cell of the second carrier through switching, which can achieve fast access to the cell of the second carrier, reduce the time delay of accessing the cell of the second carrier, and ensure the service and performance of the terminal device. In addition, since the information of the SSB is provided, the SSB can be more accurately searched, unnecessary detection is reduced, and energy consumption is reduced.

[0118] Similarly, in the embodiments of the present application, the terminal device can also obtain the identification information of the cell of the second carrier through the cell of the first carrier. Optionally, the second message further comprises: the identification information of the cell of the second carrier; and S330 comprises: the terminal device accesses the cell of the second carrier according to the RMSI, the SSB and the identification information.

[0119] The identification information of the cell of the second carrier comprises information for identifying the cell of the second carrier, such as a PCI. After obtaining the identification information of the cell of the second carrier, the terminal device can find the cell of the second carrier based on the identification information, and access the cell of the second carrier according to the SSB and the RMSI.

[0120] Similarly, the terminal device can also know whether the second message is broadcast in the cell of the first carrier (or whether there is a broadcast message comprising the system message of the cell of the second carrier), that is, whether the terminal device can obtain the system broadcast message of the cell of the second carrier through the cell of the first carrier.

[0121] Optionally, the method 300 further comprises: S340, the network device broadcasts a third indication through the cell of the first carrier. Correspondingly, the terminal device receives the third indication through the cell of the first carrier. The third indication is used to indicate that the second message is broadcast in the cell of the first carrier, and the third indication is carried in a master information block (MIB) or a system information block (SIB).

[0122] The third indication is carried in the SIB1 or the MIB of the first carrier itself, for example, the third indication can be represented by 1 bit, and when the value is 1, it represents that the cell of the first carrier broadcasts the second message, and when the value is 0, it represents that the cell of the first carrier does not have the second message. It can be understood that the meaning represented by the bit value here is only an exemplary description, and does not constitute a limitation on the embodiments of the present application.

[0123] Therefore, by introducing the third indication, the terminal device can determine whether there is a broadcast message comprising the system message of the cell of the second carrier in the cell of the first carrier. In addition, the introduced third indication can be carried in the broadcast message of the cell of the first carrier itself, avoiding introducing new signaling or messages, and saving the overhead. Alternatively, the third indication can also be carried in a newly defined message, which is not specifically limited.

[0124] It should be understood that the present application does not specifically limit the execution order of S340 and S310, for example, S340 can be executed before S310.

[0125] It can be understood that some optional features in the embodiments of the present application can be implemented independently in some scenarios, solve corresponding technical problems, and achieve corresponding effects, without relying on other features, such as the scheme currently based on. In some scenarios, the features can be combined with other features according to requirements. Correspondingly, the apparatuses given in the embodiments of the present application can also implement these features or functions, which will not be described here.

[0126] It can also be understood that the various schemes in the embodiments of the present application can be reasonably combined, and the explanations or descriptions of various terms appearing in the embodiments can be mutually referenced or explained in various embodiments, without limitation.

[0127] It can also be understood that in various embodiments of the present application, the size of the serial number of each process does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic. The various digital numbers or serial numbers involved in the above processes are only distinguished for the convenience of description, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0128] Corresponding to the method given in the above method embodiment, the embodiments of the present application also provide a corresponding apparatus, which includes units for executing the corresponding units of the above embodiments. The units can be software, hardware, or a combination of software and hardware. It can be understood that the technical features described in the method embodiments are also applicable to the following apparatus embodiments.

[0129] Figure 5 is a schematic block diagram of an apparatus of an embodiment of the present application. As Figure 5 indicated, the apparatus 1700 provided by another embodiment of the present application is a communication apparatus. The apparatus can be a terminal device, or a component (for example, an integrated circuit, a chip, etc.) of a terminal device. The apparatus can also be a network device, or a component (for example, an integrated circuit, a chip, etc.) of a network device. The apparatus can also be another communication module, used to implement the methods in the method embodiments of the present application.

[0130] As Figure 5 indicated, the apparatus 1700 can include a transceiver 1701 and a processing unit 1702. Optionally, the apparatus 1700 can also include a storage unit, which can be used to store instructions or data. The processing unit can invoke the instructions or data stored in the storage unit to implement corresponding operations. The storage unit can be implemented by at least one memory.

[0131] The transceiver unit 1701 may also be referred to as a transceiver, a transceiver, a transceiver device, etc. Among them, the processing unit 1702 may be a processor. Among them, the transceiver unit 1701 has both receiving and transmitting functions, and may include a receiving unit (corresponding to the receiving function) and a transmitting unit (corresponding to the transmitting function). Exemplarily, the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc. Optionally, the above-mentioned receiving unit and transmitting unit may be an integrated unit or multiple independent units. The above-mentioned receiving unit and transmitting unit may be located in one geographical location or dispersed in multiple geographical locations.

[0132] In one possible design, Figure 5 One or more units may be implemented by one or more processors, or by one or more processors and memories, or by one or more processors and transceivers, or by one or more processors, memories, and transceivers, and this is not limited in the present embodiment. The processors, memories, and transceivers may be provided separately or integrated.

[0133] The device has the function of implementing the terminal device described in the embodiment of the present application. For example, the device includes a module or unit or means (means) corresponding to the terminal device executing the steps involved in the terminal device described in the embodiment of the present application. The function or unit or means (means) can be implemented by software, or by hardware, or by hardware executing the corresponding software implementation, or by a combination of software and hardware. For details, please refer to the corresponding description in the aforementioned corresponding method embodiment. It can be understood that when the device 1700 is a terminal device, the transceiver unit 1701 can correspond to Figure 6 The transceiver 2020 in the processing unit 1702 may correspond to Figure 6 . It should be understood that when the communication device 1700 is a chip configured in the terminal device, the transceiver unit 1701 in the communication device 1700 may be an input / output interface circuit. Optionally, if the communication device 1700 further includes a storage unit, the storage unit may be implemented by at least one memory, for example, corresponding to Figure 6 The memory 2030 in the terminal device 2000.

[0134] Alternatively, the apparatus has the function of the network device described in the embodiments of the present application, for example, the apparatus includes a module or unit or means corresponding to the steps involved in the network device described in the embodiments of the present application, and the function or unit or means can be implemented by software or by hardware, or by a combination of hardware and software. For details, further reference can be made to the corresponding description in the foregoing method embodiments. It can be understood that, when the apparatus 1700 is a network device, the transceiver unit 1701 can correspond to the transceiver unit 1101 in the network device 1100 shown in Figure 7 , the processing unit 1702 can correspond to the processing unit 1102 in the network device 1100 shown in Figure 7 . Alternatively, if the communication apparatus 1700 further includes a storage unit, the storage unit can be implemented by at least one memory, for example, can correspond to the memory in Figure 7 .

[0135] In a possible implementation, an apparatus 1700 can include: a transceiver unit 1701, configured to receive a first message through a cell of a first carrier, the first message including remaining minimum system information (RMSI) of a cell of a second carrier and a first indication, the first indication being used to indicate information of a first bandwidth part (BWP); and a processing unit 1702, configured to access the cell of the second carrier according to the first BWP and the RMSI.

[0136] Optionally, the cell of the first carrier is not in an energy saving state, and the cell of the second carrier is in an energy saving state.

[0137] Optionally, the apparatus 1700 further includes: identification information of the cell of the second carrier; and the processing unit 1702 is configured to access the cell of the second carrier according to the first BWP, the RMSI, and the identification information.

[0138] Optionally, the first indication includes: frequency point information of the second carrier and a frequency offset of the first BWP; or the first indication includes: frequency point information of a synchronization signal block (SSB) of the cell of the second carrier, a first parameter, and a frequency offset of the first BWP, the first parameter being used to determine a starting frequency point position of a bandwidth of the second carrier; or the first indication includes: a frequency point position of the first BWP.

[0139] Optionally, the transceiver unit 1701 is further configured to receive a second indication through the cell of the first carrier, the second indication being used to indicate that the first message is broadcast by the cell of the first carrier, and the second indication is carried in a master information block (MIB) or a system information block (SIB).

[0140] It can be understood that the apparatus 1700 can correspond to the method of the terminal device in the foregoing method embodiments, such as the method in the foregoing method embodiments, and the above and other management operations and / or functions of each unit in the apparatus 1700 are respectively to implement the corresponding steps of the method of the terminal device in the foregoing method embodiments, and thus the foregoing beneficial effects in the foregoing method embodiments can also be achieved, and for brevity, will not be repeated here. Figure 2

[0141] In another possible implementation, an apparatus 1700 can include: a processing unit 1702 configured to generate a first message, the first message including remaining minimum system information (RMSI) of a cell of a second carrier and a first indication, the first indication being used to indicate information of a first bandwidth part (BWP); and a transceiver unit 1701 configured to broadcast the first message over a first carrier.

[0142] Optionally, the cell of the first carrier is not in an energy saving state, and the cell of the second carrier is in an energy saving state.

[0143] Optionally, the first message further includes identification information of the cell of the second carrier.

[0144] Optionally, the first indication includes frequency point information of the second carrier and a frequency offset of the first BWP; or the first indication includes frequency point information of a synchronization signal block (SSB) of the cell of the second carrier, a first parameter used to determine a starting frequency point position of a bandwidth of the second carrier, and a frequency offset of the first BWP; or the first indication includes a frequency point position of the first BWP.

[0145] Optionally, the transceiver unit 1701 is further configured to broadcast a second indication over the first carrier, the second indication being carried in a master information block (MIB) or a system information block (SIB), the second indication being used to indicate that the cell of the first carrier broadcasts the first message.

[0146] It can be understood that the apparatus 1700 can correspond to the method of the network device in the foregoing method embodiments, such as the method in the foregoing method embodiments, and the above and other management operations and / or functions of each unit in the apparatus 1700 are respectively to implement the corresponding steps of the method of the network device in the foregoing method embodiments, and thus the foregoing beneficial effects in the foregoing method embodiments can also be achieved, and for brevity, will not be repeated here. Figure 2

[0147] ​​In yet another possible implementation, an apparatus 1700 can include: a transceiver 1701 configured to receive, by a cell of a first carrier, a second message, the second message comprising remaining minimum system information (RMSI) of a cell of a second carrier and information of a synchronization signal block (SSB) of the cell of the second carrier; and a processor 1702 configured to access the cell of the second carrier according to the RMSI and the information of the SSB. Optionally, the processor 1702 is further configured to detect the SSB according to the information of the SSB.

[0148] Optionally, the cell of the first carrier is not in an energy saving state, and the cell of the second carrier is in an energy saving state.

[0149] Optionally, the information of the SSB comprises one or more of a periodicity of the SSB, a frequency point of the SSB, and a carrier spacing of the SSB.

[0150] Optionally, the second message further comprises identification information of the cell of the second carrier; and the processor 1702 is configured to access the cell of the second carrier according to the RMSI and the SSB, including accessing the cell of the second carrier according to the RMSI, the SSB, and the identification information.

[0151] Optionally, the processor 1702 is further configured to receive, by the cell of the first carrier, a third indication indicating that the cell of the first carrier broadcasts the second message, the third indication being carried in a master information block (MIB) or a system information block (SIB).

[0152] It can be understood that the apparatus 1700 can correspond to the method of the terminal device in the foregoing method embodiments, such as the method in any one of Figure 4 Figure 4 The foregoing and other management operations and / or functions of the various units in the apparatus 1700 are respectively for implementing the corresponding steps of the method of the terminal device in the foregoing method embodiments, and thus can also achieve the beneficial effects in the foregoing method embodiments. For the sake of brevity, no further elaboration is made here.

[0153] In another possible implementation, an apparatus 1700 can include a processor 1702 configured to generate a second message, the second message comprising remaining minimum system information (RMSI) of a cell of a second carrier and information of a synchronization signal block (SSB) of the cell of the second carrier; and a transceiver 1701 configured to broadcast the second message by a first carrier.

[0154] Optionally, the cell of the first carrier is not in an energy saving state, and the cell of the second carrier is in an energy saving state.

[0155] Optionally, the SSB information includes one or more of the following: SSB period, SSB frequency, and SSB carrier spacing.

[0156] Optionally, the second message further includes: identification information of the cell of the second carrier.

[0157] Optionally, the transceiver unit 1701 is further used to broadcast a third indication through the first carrier, where the third indication is used to indicate that the cell of the first carrier broadcasts the second message, and the third indication is carried in a master information block MIB or a system information block SIB.

[0158] It can be understood that the apparatus 1700 may correspond to the method of the network device in the aforementioned method embodiment, for example, Figure 4 The method in the embodiment, and the above-mentioned and other management operations and / or functions of each unit in the device 1700 are respectively the corresponding steps of the method for implementing the network device in the aforementioned method embodiment, so the beneficial effects in the aforementioned method embodiment can also be achieved. For the sake of brevity, they are not described here.

[0159] Figure 6 This is a schematic diagram of the structure of the terminal device 2000 provided in the embodiment of the present application. The terminal device 2000 can be applied to Figure 1 In the system shown, the functions of the terminal device in the above method embodiment are performed. Figure 6 As shown, the terminal device 2000 includes a processor 2010 and a transceiver 2020. Optionally, the terminal device 2000 also includes a memory 2030. The processor 2010, the transceiver 2020, and the memory 2030 can communicate with each other through internal connection paths to transmit control or data signals. The memory 2030 is used to store computer programs, and the processor 2010 is used to call and execute the computer programs from the memory 2030 to control the transceiver 2020 to transmit and receive signals. Optionally, the terminal device 2000 may also include an antenna 2040 for transmitting uplink data or uplink control signaling output by the transceiver 2020 via wireless signals.

[0160] The processor 2010 and the memory 2030 can be combined into a processing device, and the processor 2010 is used to execute the program code stored in the memory 2030 to implement the above functions. In specific implementation, the memory 2030 can also be integrated into the processor 2010, or independent of the processor 2010. The processor 2010 can be combined with the memory 2030 to form a processing device. Figure 5 Corresponding to the processing unit 1702 in .

[0161] The transceiver 2020 can be used with Figure 5The transceiver 2020 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). The receiver is used to receive signals, and the transmitter is used to transmit signals.

[0162] It should be understood that Figure 6 The terminal device 2000 shown can realize Figure 2 or Figure 4 The illustrated method embodiment involves various processes of a terminal device (first terminal device). The operations or functions of the various modules in terminal device 2000 are respectively for implementing the corresponding processes in the aforementioned method embodiment. For details, please refer to the description of the aforementioned method embodiment. To avoid repetition, detailed description is appropriately omitted here.

[0163] The processor 2010 can be used to execute the actions implemented within the terminal device described in the previous method embodiments, while the transceiver 2020 can be used to execute the actions of the terminal device sending to or receiving from the network device described in the previous method embodiments. For details, please refer to the description of the previous method embodiments and will not be repeated here.

[0164] Optionally, the terminal device 2000 may further include a power supply 2050 for providing power to various devices or circuits in the terminal device.

[0165] In addition, in order to make the functions of the terminal device more complete, the terminal device 2000 may also include one or more of an input unit 2060, a display unit 2070, an audio circuit 2080, a camera 2090 and a sensor 2100, and the audio circuit may also include a speaker 2082, a microphone 2084, etc.

[0166] I understand. Figure 6 The structure of the terminal device in the example is only one possible form and should not constitute any limitation to the embodiments of the present application. The present application does not exclude the possibility of other forms of terminal device structures that may appear in the future.

[0167] Figure 7 1 is a schematic diagram of the structure of a network device 1100 according to an embodiment of the present application. The network device 1100 can be applied to Figure 1 in the system shown.

[0168] In a 5G communication system, the network device 1100 may include a CU, a DU, and an active antenna unit (AAU). The CU and DU may communicate via interfaces, where the control plane (CP) interface may be an Fs-C, such as F1-C, and the user plane (UP) interface may be an Fs-U, such as F1-U.

[0169] CU, DU, AAU can be separated or combined, so there are many network deployment forms, one possible deployment form is as shown in Figure 7 CU and DU are deployed in the same hardware. It should be understood that Figure 7 is only an example, the protection scope of the present application is not limited, for example, the deployment form can also be that the DU is deployed in the 5G BBU machine room, the CU is centrally deployed or the DU is centrally deployed, the CU is centrally deployed at a higher level, etc.

[0170] The AAU can realize the transceiving function and be referred to as a transceiving unit 1101, which corresponds to the transceiving unit 1701 in Figure 5 The AAU is mainly used for transceiving of radio frequency signals and conversion between radio frequency signals and baseband signals, for example, for sending the messages or information in the above embodiments to the terminal device. Alternatively, the transceiving unit 1101 can also be referred to as a transceiver, a transceiving circuit, or a transceiver, etc., which can include at least one antenna 1111 and a radio frequency unit 1112. Alternatively, the transceiving unit 1101 can include a receiving unit and a sending unit, the receiving unit can correspond to a receiver (or a receiver, a receiving circuit), and the sending unit can correspond to a transmitter (or a transmitter, a transmitting circuit). The AAU part is mainly used for transceiving of radio frequency signals and conversion between radio frequency signals and baseband signals, for example, for sending the control information described in the above embodiments to the terminal device. The CU and the DU can realize internal processing functions and be referred to as a processing unit 1102 for baseband processing, controlling the base station, etc. The AAU and the CU and the DU can be physically arranged together or physically separated, that is, a distributed base station.

[0171] The CU and the DU are the control center of the network device and can also be referred to as a processing module (or a processing unit), which can correspond to the processing unit 1702 and is mainly used for completing baseband processing functions such as channel coding, multiplexing, modulation, spreading, etc. For example, the CU and the DU (processing unit 1702) 1102 can be used for the network device 1100 to execute the operation processes of the network device in the above method embodiments.

[0172] In one example, the CU and DU may be composed of one or more single boards, and multiple single boards may jointly support a wireless access network of a single access standard (such as an LTE system or a 5G system), or may respectively support wireless access networks of different access standards. The CU and DU also include a memory 1121 and a processor 1122. The memory 1121 is used to store necessary instructions and data. The processor 1122 is used to control the base station to perform necessary actions, such as controlling the base station to execute the operation process of the network device in the above method embodiment. The memory 1121 and the processor 1122 can serve one or more single boards. That is, a memory and a processor can be set separately on each single board. Alternatively, multiple single boards may share the same memory and processor. In addition, necessary circuits can also be set on each single board.

[0173] The CU and DU 1102 can be used to perform the actions implemented within the network device described in the previous method embodiments, while the AAU can be used to perform the actions described in the previous method embodiments in which the network device sends or receives data from the terminal device. For details, please refer to the description in the previous method embodiments and will not be repeated here.

[0174] In addition, network equipment is not limited to Figure 7 The form shown may also be other forms: for example, including a BBU and an adaptive radio unit (ARU), or including a BBU and an active antenna unit (AAU); it may also be customer premises equipment (CPE), or it may be other forms, which are not limited in this application.

[0175] It should be understood that Figure 7 The network device 1100 shown can implement the above method embodiments (for example, Figures 2-4 ) The network device functions involved in the network device 1100. The operations and / or functions of each unit in the network device 1100 are respectively for implementing the corresponding processes executed by the network device in the embodiment of the method of the present application. To avoid repetition, detailed description is appropriately omitted here. Figure 7 The structure of the network device in the example is only one possible form and should not constitute any limitation to the embodiments of the present application. The present application does not exclude the possibility of other forms of network device structures that may appear in the future.

[0176] It should be understood that the processor in the embodiments of the present application can be an integrated circuit chip with a processing capability of signals. In the implementation process, each step of the method embodiments can be completed by the integrated logic circuit of hardware or the instructions in the form of software in the processor. The processor can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, a discrete gate or transistor logic device, a discrete hardware component, and can also be a system chip (SoC), a central processing unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), a micro controller unit (MCU), a programmable logic device (PLD) or other integrated chips. The disclosed methods, steps and logic block diagrams in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as a hardware decoding processor for execution, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a random access memory, a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register or other mature storage medium in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and combines the hardware to complete the steps of the above method.

[0177] The techniques described in this application can be implemented in various ways. For example, these techniques can be implemented using hardware, software, or a combination thereof. For a hardware implementation, the processing units used to perform the techniques at a communication device (e.g., a base station, a terminal, a network entity, or a chip) can be implemented within one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, a computer, or a combination thereof. The processor can also be implemented as a combination of computing devices, e.g., a combination of a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other such configuration.

[0178] It is to be understood that the memory in the embodiments of the present application can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically EPROM (EEPROM), or flash memory. The volatile memory can be random access memory (RAM) used as external cache. By way of example, and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and direct Rambus RAM (DR RAM). Note that the system and method described herein are intended to include all such memory types and any other suitable type of memory.

[0179] The present application also provides a computer readable storage medium, having stored thereon a computer program, which, when executed by a computer, implements the functions of any of the method embodiments described above.

[0180] The application further provides a computer program product, which, when executed by a computer, implements the functions of any of the method embodiments described above.

[0181] According to the method provided in the embodiments of the application, the application further provides a system, which comprises the terminal device and the network device described above.

[0182] The application further provides a chip comprising a processor. The processor is configured to read and execute a computer program stored in a memory to perform corresponding operations and / or procedures performed by a terminal device in the method for accessing a cell provided in the application. Optionally, the chip further comprises the memory, and the processor is connected to the memory through a circuit or a wire. The processor is configured to read and execute the computer program in the memory. Further optionally, the chip further comprises a communication interface, and the processor is connected to the communication interface. The communication interface is configured to receive data and / or information (or a message) to be processed. The processor obtains the data and / or information (or the message) from the communication interface and processes the data and / or information (or the message). The communication interface can be an input / output interface.

[0183] The application further provides a chip comprising a processor. The processor is configured to read and execute a computer program stored in a memory to perform corresponding operations and / or procedures performed by a network device in the method for accessing a cell provided in the application. Optionally, the chip further comprises the memory, and the processor is connected to the memory through a circuit or a wire. The processor is configured to read and execute the computer program in the memory. Further optionally, the chip further comprises a communication interface, and the processor is connected to the communication interface. The communication interface is configured to receive data and / or information (or a message) to be processed. The processor obtains the data and / or information (or the message) from the communication interface and processes the data and / or information (or the message). The communication interface can be an input / output interface.

[0184] It should be understood that the "embodiments" mentioned throughout the specification mean that the specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the application. Therefore, the various embodiments throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that the size of the sequence number of each process described above does not mean the execution order, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the application.

[0185] It should also be understood that, in this application, "when", "if" and "whether" are used to indicate that the UE or the base station will make corresponding processing under certain objective conditions, and are not limited in time, and do not require the UE or the base station to have a judgment action when implementing, nor mean that there are other limitations.

[0186] It can be understood by those skilled in the art that various numbers such as first, second, etc. involved in the present application are only for the convenience of description and do not limit the scope of the embodiments of the present application, nor represent the order.

[0187] In the present application, the element expressed by a singular number is intended to represent "one or more", rather than "one and only one", unless otherwise specified. In the present application, "at least one" is intended to represent "one or more" and "a plurality" is intended to represent "two or more" unless otherwise specified.

[0188] In addition, the terms "system" and "network" are often used interchangeably in this document. The term "and / or" in this document is only used to describe the association relationship of the associated objects. It means that there are three relationships, for example, A and / or B, which means that there are three cases: A exists alone, A and B exist together, and B exists alone, where A can be singular or plural, and B can be singular or plural.

[0189] The character " / " generally represents an "or" relationship between the associated objects before and after it.

[0190] The term "at least one" or "at least one" in this document means all or any combination of the listed items, for example, "at least one of A, B and C" can mean six cases: A exists alone, B exists alone, C exists alone, A and B exist together, B and C exist together, and A, B and C exist together, where A can be singular or plural, B can be singular or plural, and C can be singular or plural.

[0191] It should be understood that in the embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that the determination of B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.

[0192] Those skilled in the art can clearly understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0193] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0194] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are merely schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, 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 coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0195] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment.

[0196] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit.

[0197] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0198] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for accessing a cell, characterized in that: include: The terminal device receives a first message broadcast in a cell of a first carrier through a network device, where the first message includes remaining minimum system information RMSI and a first indication of a cell of a second carrier, where the first indication is used to indicate information of a first bandwidth part BWP, and the network device is a network device of the cell of the first carrier and the cell of the second carrier; The terminal device accesses the cell of the second carrier according to the first BWP and the RMSI, The cell of the first carrier is not in an energy-saving state, and the cell of the second carrier is in an energy-saving state.

2. The method according to claim 1, characterized in that The first message further includes: identification information of the cell of the second carrier; The terminal device accessing the cell of the second carrier according to the first BWP and the RMSI includes: The terminal device accesses the cell of the second carrier according to the first BWP, the RMSI and the identification information.

3. The method according to claim 1 or 2, characterized in that The first indication includes: frequency information of the second carrier and a frequency offset of the first BWP; Alternatively, the first indication includes: frequency information of the SSB of the cell of the second carrier, a first parameter, and a frequency offset of the first BWP, where the first parameter is used to determine a starting frequency position of the bandwidth of the second carrier; Alternatively, the first indication includes: a frequency position of the first BWP.

4. The method according to claim 1 or 2, characterized in that The method further comprises: The terminal device receives a second indication through the cell of the first carrier, where the second indication is used to indicate that the cell of the first carrier broadcasts the first message, and the second indication is carried in the master information block MIB or the system information block SIB.

5. A method for accessing a cell, characterized in that: include: The network device generates a first message, where the first message includes remaining minimum system information (RMSI) of the cell of the second carrier and a first indication, where the first indication is used to indicate information of the first bandwidth part (BWP); The network device broadcasts the first message via a first carrier, and the network device is a network device of a cell of the first carrier and a cell of the second carrier. The cell of the first carrier is not in an energy-saving state, and the cell of the second carrier is in an energy-saving state.

6. The method according to claim 5, characterized in that The first message further includes: identification information of the cell of the second carrier.

7. The method according to claim 5 or 6, characterized in that The first indication includes: frequency information of the second carrier and a frequency offset of the first BWP; Alternatively, the first indication includes: frequency information of the SSB of the cell of the second carrier, a first parameter, and a frequency offset of the first BWP, where the first parameter is used to determine a starting frequency position of the bandwidth of the second carrier; Alternatively, the first indication includes: a frequency position of the first BWP.

8. The method according to claim 5 or 6, characterized in that The method further comprises: The network device broadcasts a second indication through the first carrier, where the second indication is used to indicate that a cell of the first carrier broadcasts the first message, and the second indication is carried in a master information block MIB or a system information block SIB.

9. A device for accessing a cell, characterized in that: include: a transceiver unit, configured to receive, through a network device, a first message broadcast in a cell of a first carrier, where the first message includes remaining minimum system information (RMSI) and a first indication of a cell of a second carrier, where the first indication is used to indicate information of a first bandwidth part (BWP), and the network device is a network device of the cell of the first carrier and the cell of the second carrier; a processing unit, configured to access a cell of the second carrier according to the first BWP and the RMSI, The cell of the first carrier is not in an energy-saving state, and the cell of the second carrier is in an energy-saving state.

10. The device according to claim 9, characterized in that The first message further includes: identification information of the cell of the second carrier; The processing unit is configured to access the cell of the second carrier according to the first BWP and the RMSI, including: Access the cell of the second carrier according to the first BWP, the RMSI, and the identification information.

11. The device according to claim 9 or 10, characterized in that The transceiver unit is further configured to receive a second indication through the cell of the first carrier, where the second indication is used to indicate that the cell of the first carrier broadcasts the first message, and the second indication is carried in a master information block MIB or a system information block SIB.

12. A device for accessing a cell, characterized in that: include: a processing unit, configured to generate a first message, where the first message includes remaining minimum system information (RMSI) of the cell of the second carrier and a first indication, where the first indication is used to indicate information of the first bandwidth part (BWP); a transceiver unit, configured to broadcast the first message via a first carrier, wherein the device is a device of a network device of a cell of the first carrier and a cell of the second carrier, The cell of the first carrier is not in an energy-saving state, and the cell of the second carrier is in an energy-saving state.

13. The device according to claim 12, characterized in that The transceiver unit is further configured to broadcast a second indication through the first carrier, where the second indication is used to indicate that a cell of the first carrier broadcasts the first message, and the second indication is carried in a master information block MIB or a system information block SIB.

14. A device for accessing a cell, characterized in that: include: Memory for storing computer programs; A processor, configured to execute the computer program stored in the memory, so that the apparatus performs the method for accessing a cell according to any one of claims 1 to 4, or performs the method for accessing a cell according to any one of claims 5 to 8.

15. A computer-readable storage medium, characterized in that The method comprises a computer program, which, when running on a computer, enables the computer to execute the method for accessing a cell according to any one of claims 1 to 4, or the method for accessing a cell according to any one of claims 5 to 8.

16. A chip, characterized in that: comprising at least one processor and an interface; At least one of the processors is configured to call and run a computer program so that the chip executes the method for accessing a cell according to any one of claims 1 to 4, or the method for accessing a cell according to any one of claims 5 to 8.

Images