Communication method and device

Abstract

Provided is a communication method, comprising: a terminal device receiving a master information block (MIB), the MIB comprising first indication information and second indication information, the first indication information being used for indicating whether a cell is prohibited, and the second indication information being used for indicating whether a co-frequency reselection operation is allowed; and under the condition that the first indication information indicates that the cell is prohibited, the terminal device determines whether to perform a same-frequency reselection operation according to second indication information, and the terminal device is a terminal RedCap UE with reduced capability. Based on the technical scheme, the RedCap UE can use different IFRI indications under the condition that the cell is prohibited, so that the efficiency of judging to carry out the cell reselection operation by the terminal equipment is improved.

Description

[0001] This application is a divisional application. The application number of the original application is 202111193246.1, and the original application date is October 13, 2021. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The embodiments of the present application relate to the field of communications, and in particular, to a communication method, device, and system. Background Art

[0003] The three major scenarios of the fifth generation (5G) new radio (NR) include: enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (URLLC), and massive machine type of communication (mMTC).

[0004] Reduced capability UE (RedCap UE) is a technology that further enhances 5G NR. The capabilities of these terminals are lower-end than eMBB and URLLC. For example, RedCap UE may reduce the complexity of the following features: reduce the maximum bandwidth capability, reduce the number of transmit and receive antennas / antenna channels (branch), reduce the maximum multiple input multiple output (MIMO) layer capability, reduce the maximum modulation order capability, etc.

[0005] In the existing technology, there are still some problems in the access control process of RedCap UE, such as low access efficiency and additional energy consumption. Therefore, technical personnel are currently committed to optimizing the access control process of RedCap UE.

[0006] Therefore, the embodiments of the present application aim to solve the problems of how to enable the RedCap UE to use different IFRI indications when the cell is prohibited, so as to speed up the efficiency of the terminal device in determining the cell reselection operation; and how to design a UE behavior rule when the RedCap specific IFRI is not sent, so as to clarify how the UE determines the same-frequency reselection operation. Summary of the invention

[0007] An embodiment of the present application provides a communication method that enables a terminal device (RedCap UE) to use different IFRI indications when a cell is prohibited, so as to speed up the efficiency of the terminal device in determining to perform a cell reselection operation, and can design a behavior rule when a RedCap-specific IFRI is not sent, so as to clarify how the terminal device (RedCap UE) determines the same-frequency reselection operation.

[0008] In a first aspect, a communication method is provided, comprising: a terminal device receives a master information block MIB, the MIB comprising first indication information and second indication information, the first indication information being used to indicate whether a cell is prohibited, and the second indication information being used to indicate whether an intra-frequency reselection operation is allowed; when the first indication information indicates that the cell is prohibited, the terminal device determines whether to perform an intra-frequency reselection operation based on the second indication information, wherein the terminal device is a terminal with reduced capability RedCap UE.

[0009] It should be noted that the embodiments of the present application are not limited to the terminal device being a RedCap UE, that is, the embodiments of the present application are also applicable to terminals having the same or similar access control mechanism as that of the RedCap UE.

[0010] Based on the above technical solution, the terminal device (RedCap UE) receives the master information block MIB, and when the first indication information in the MIB indicates that the current cell is prohibited, determines whether to perform the same frequency reselection operation according to the second indication information in the MIB. Thus, the terminal device (RedCap UE) can use different IFRI indications when the cell is prohibited, so as to speed up the efficiency of the terminal device in determining to perform the cell reselection operation.

[0011] In a second aspect, a communication method is provided, comprising: a terminal device receives first information; when the first information does not include third indication information, the terminal device determines whether an intra-frequency reselection operation is allowed, wherein the third indication information is used to indicate whether the intra-frequency reselection operation is allowed.

[0012] It should be noted that the embodiments of the present application are not limited to the terminal device being a RedCap UE, that is, the embodiments of the present application are also applicable to terminals having the same or similar access control mechanism as that of the RedCap UE.

[0013] Based on the above technical solution, the terminal device (RedCap UE) receives the first information, and when the first information does not include the third indication information indicating whether to perform the same-frequency reselection operation, the terminal device determines that the same-frequency reselection operation is allowed. Therefore, a behavior rule is designed when the RedCap specific IFRI is not sent to clarify how the terminal device (RedCap UE) determines the same-frequency reselection operation.

[0014] In combination with the second aspect, in certain implementations of the second aspect, the first information also includes fourth indication information, and the method also includes: the terminal device determines, based on the fourth indication information, that the current cell of the terminal device is prohibited, and the fourth indication information is used to indicate whether the current cell of the terminal device is prohibited.

[0015] In combination with the second aspect, in some implementations of the second aspect, the terminal device is a reduced capability terminal RedCap UE.

[0016] According to a third aspect, a communication method is provided, comprising: a network device sends a main information block MIB, the MIB comprising first indication information and second indication information, the first indication information being used to indicate whether a cell is prohibited, and the second indication information being used to indicate whether a same-frequency reselection operation is allowed; when the first indication information indicates that the cell is prohibited, the second indication information being used to indicate whether a terminal device performs a same-frequency reselection operation, wherein the terminal device is a terminal with reduced capability RedCap UE.

[0017] Based on the above technical solution, the network device sends the master information block MIB to the terminal device (RedCap UE), and when the first indication information in the MIB indicates that the current cell is prohibited, the second indication information in the MIB indicates whether to perform the same frequency reselection operation. Thus, the terminal device (RedCap UE) can use different IFRI indications when the cell is prohibited, so as to speed up the efficiency of the terminal device in determining the cell reselection operation.

[0018] In a fourth aspect, a communication method is provided, comprising: a network device sends first information; when the first information does not include third indication information, it is used to instruct a terminal device to determine whether an intra-frequency reselection operation is allowed, wherein the third indication information is used to indicate whether the intra-frequency reselection operation is allowed.

[0019] Based on the above technical solution, the network device sends the first information to the terminal device (RedCap UE), and when the first information does not include the third indication information indicating whether to perform the same-frequency reselection operation, the network device indicates that the terminal device is allowed to perform the same-frequency reselection operation. Therefore, a behavior rule is designed when the RedCap specific IFRI is not sent to clarify how the terminal device (RedCap UE) determines the same-frequency reselection operation.

[0020] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first information also includes fourth indication information, and the method also includes: the fourth indication information is used to indicate that the current cell of the terminal device is prohibited.

[0021] In combination with the fourth aspect, in some implementations of the fourth aspect, the terminal device is a reduced-capability terminal RedCap UE.

[0022] In a fifth aspect, a communication device is provided, comprising: a receiving unit, used to receive a main information block MIB, the MIB comprising first indication information and second indication information, the first indication information being used to indicate whether a cell is prohibited, and the second indication information being used to indicate whether an intra-frequency reselection operation is allowed; a processing unit, used to determine whether to perform an intra-frequency reselection operation according to the second indication information when the first indication information indicates that the cell is prohibited, wherein the terminal device is a terminal with reduced capability RedCap UE.

[0023] In a sixth aspect, a communication device is provided, comprising: a receiving unit for receiving first information; and a processing unit for determining whether an intra-frequency reselection operation is allowed when the first information does not include third indication information, wherein the third indication information is used to indicate whether the intra-frequency reselection operation is allowed.

[0024] In combination with the sixth aspect, in certain implementations of the sixth aspect, the first information also includes fourth indication information, and the processing unit is further used to: determine whether the current cell of the terminal device is prohibited based on the fourth indication information, and the fourth indication information is used to indicate whether the current cell of the terminal device is prohibited.

[0025] In combination with the sixth aspect, in certain implementations of the sixth aspect, the terminal device is a reduced-capability terminal RedCap UE.

[0026] In the seventh aspect, a communication device is provided, including: a sending unit, used to send a main information block MIB, the MIB including first indication information and second indication information, the first indication information is used to indicate whether a cell is prohibited, and the second indication information is used to indicate whether an intra-frequency reselection operation is allowed; a processing unit, when the first indication information indicates that the cell is prohibited, the second indication information is used to indicate whether a terminal device performs an intra-frequency reselection operation, wherein the terminal device is a terminal with reduced capability RedCap UE.

[0027] In an eighth aspect, a communication device is provided, comprising: a sending unit, configured to send first information; and a processing unit, configured to instruct a terminal device to determine whether an intra-frequency reselection operation is allowed when the first information does not include third indication information, wherein the third indication information is used to indicate whether the intra-frequency reselection operation is allowed.

[0028] In combination with the eighth aspect, in certain implementations of the eighth aspect, the first information also includes fourth indication information, and the processing unit is further used to: the fourth indication information is used to indicate that the current cell of the terminal device is prohibited.

[0029] In combination with the eighth aspect, in certain implementations of the eighth aspect, the terminal device is a reduced-capability terminal RedCap UE.

[0030] In the ninth aspect, a computer program product is provided, comprising: a computer program (also referred to as code, or instruction), which, when executed, enables a computer to execute a method in any possible implementation of the first to fourth aspects above.

[0031] In the tenth aspect, a computer-readable medium is provided, which stores a computer program (also referred to as code, or instruction) which, when executed on a computer, enables the computer to execute a method in any possible implementation of the first to fourth aspects above.

[0032] In the eleventh aspect, a chip system is provided, comprising a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that a communication device equipped with the chip system executes a method in any possible implementation of the first to fourth aspects above.

[0033] Among them, the chip system may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of a system architecture applied to this application.

[0035] Figure 2 It is a schematic flow chart of a communication method provided in an embodiment of the present application.

[0036] Figure 3 It is a schematic flow chart of a communication method provided in yet another embodiment of the present application.

[0037] Figure 4 It is a schematic flow chart of a communication method provided in yet another embodiment of the present application.

[0038] Figure 5 It is a schematic flow chart of a communication method provided in yet another embodiment of the present application.

[0039] Figure 6 It is a schematic flow chart of a communication method provided in yet another embodiment of the present application.

[0040] Figure 7 It is a schematic block diagram of the device 700 provided in this application.

[0041] Figure 8It is a schematic block diagram of the device 800 provided in this application.

[0042] Fig. 9 It is a schematic structural diagram of the device provided in the embodiment of the present application. DETAILED DESCRIPTION

[0043] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0044] The technical solution provided in this application can be applied to various communication systems, such as: long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) system or new radio (NR), etc.

[0045] The terminal device may be a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device. The terminal device in the embodiments of the present application may be a mobile phone, a tablet computer (pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc.

[0046] The access network device may be an evolved Node B (eNB), a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home evolved NodeB (or home Node B, HNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc. The access network device may also be a gNB in ​​a 5G, such as NR, system, or a transmission point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU), etc.

[0047] In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include an active antenna unit (AAU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers. The DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, the media access control (MAC) layer, and the physical (PHY) layer. The AAU implements some physical layer processing functions, radio frequency processing, and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be 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 may be classified as a network device in an access network (radio access network, RAN), or the CU may be classified as a network device in a core network (core network, CN), which is not limited in the present application.

[0048] In different network systems, the naming of network elements may be different. The following uses the naming of network elements in a 5G network as an example to illustrate this application.

[0049] First, combine Figure 1 The 5G network architecture diagram shown in the figure briefly describes the main network elements involved in the 5G network system.

[0050] 1. User equipment (UE) 101: corresponds to terminal equipment.

[0051] 2. (Radio) access network ((R)AN) network element 102: hereinafter referred to as RAN, corresponding to access network equipment. For example, RAN can be NB, eNB, gNB, ng-eNB, or any other access network equipment.

[0052] 3. User plane function (UPF) 103: used for packet routing and forwarding and quality of service (QoS) processing of user plane data.

[0053] 4. Data network (DN) 104: a network for providing data transmission.

[0054] 5. AMF 105: corresponds to the mobile management network element.

[0055] 6. Session management function (SMF) 106: mainly used for session management, allocation and management of Internet protocol (IP) addresses of user equipment, selection of endpoints of manageable user plane functions, policy control and charging function interfaces, and downlink data notification.

[0056] 7. Policy control function (PCF) 107: A unified policy framework for guiding network behavior, providing policy rule information for control plane functional network elements (such as AMF, SMF, etc.).

[0057] 8. Application function (AF) 108: used for data routing affected by applications, accessing network open functional network elements, and interacting with the policy framework for policy control.

[0058] 9. Unified data management (UDM) 109: used to process UE identification, access authentication, registration and mobility management.

[0059] 10. Unified data repository (UDR) 110: mainly includes the following functions: storage and access functions of contract data, policy data, application data and other types of data.

[0060] It is understandable that the above-mentioned network elements or functions can be network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (e.g., a cloud platform).

[0061] It should be understood that Figure 1 The interfaces between the network elements shown are only examples, and the examples should not constitute any limitation to the present application.

[0062] It should also be understood that the above-mentioned network architecture applied to the embodiment of the present application is only an example, and the network architecture applicable to the embodiment of the present application is not limited to this. Any network architecture that can realize the functions of the above-mentioned network elements is applicable to the embodiment of the present application.

[0063] It should also be understood that Figure 1 The 5G system architecture shown is an application scenario / network architecture of an embodiment of the present application. The embodiment of the present application can also be applied to other application scenarios / network architectures, for example, the communication architecture between a terminal device and a gNB (5G base station) or a next generation evolved base station (i.e., a 4G base station connected to a core network) (next generation eNodeB, ng-eNB). The embodiment of the present application does not limit this.

[0064] The above content briefly describes the system architecture and possible application scenarios of the embodiments of the present application. In order to better understand the technical solutions of the embodiments of the present application, before introducing the embodiments of the present application, the nouns or terms involved in the present application are first briefly introduced.

[0065] 1. Reduced capability UE (RedCap UE)

[0066] RedCap UE refers to terminals with reduced capabilities, which are lower-end than enhanced mobile broadband (eMBB) and ultra-reliable and low latency communication (URLLC). For example, RedCap UE may reduce the complexity of the following features: reduce the maximum bandwidth capability, reduce the number of transmit and receive antennas / antenna channels (branch), reduce the maximum multiple input multiple output (MIMO) layer capability, reduce the maximum modulation order capability, support half frequency division duplexing (FDD), etc.

[0067] 2. System information (SI)

[0068] System information is a message sent by the base station, which contains information required for UE initialization and related information of some other functions / features. System information is divided into minimum system information (Minimum SI) and other system information (Other SI).

[0069] The minimum system information consists of the master information block (MIB) and system information block 1 (SIB1), which is also called the remaining minimum system information (RMSI). MIB is broadcast periodically on the broadcast channel (BCH). SIB1 is broadcast periodically on the downlink shared channel (DL-SCH) or sent to the RRC_CONNECTED UE through dedicated signaling.

[0070] Other system information consists of other SIBs, such as SIB2 to SIB9, etc. Other SIBs are broadcast on DL-SCH periodically, or on-demand (i.e., when a UE in RRC idle state (RRC_IDLE) or RRC inactive state (RRC_INACTIVE) requests a certain SIB, the network broadcasts the SIB, otherwise the SIB is not sent), or sent to RRC connected UEs by dedicated signaling.

[0071] It should be noted that the basic process for UE in RRC idle state and RRC inactive state to obtain system information is that the UE first obtains MIB, obtains SIB1 according to the scheduling information in MIB, and then obtains other SIBs according to the scheduling information in SIB1.

[0072] 3. Cell bar mechanism

[0073] It is an access control mechanism. In NR, the network sends a cell barred indication field (cellBarred) in the master information block MIB, which is used to indicate whether the current cell is barred or not barred. If a cell is barred, UEs in RRC idle state and RRC inactive state cannot camp on the cell, and the cell will no longer be used as a candidate cell for cell reselection within a certain period of time.

[0074] 4. Intra-frequency reselection mechanism

[0075] In NR, the network sends an intra-frequency reselection indication (IFRI) field (intraFreqReselection) in the master information block MIB. This field is used to indicate whether the UE can consider the neighboring cell with the same frequency as the current cell (i.e., the same-frequency neighboring cell) as a candidate cell for reselection when the current cell is prohibited. If the field indicates allowed, the UE can consider the same-frequency neighboring cell when performing cell reselection; if the field indicates not allowed, the UE cannot consider the same-frequency neighboring cell as a candidate cell for cell reselection within a certain period of time.

[0076] Since RedCap UE is a terminal with reduced capabilities, when it accesses the network, the network may need to provide it with more resources or perform special scheduling compared to non-RedCap UE. Therefore, the standard has agreed that the network needs to use certain mechanisms to perform access control specifically for RedCap.

[0077] Based on this, the present application proposes a communication method that enables the terminal device (RedCap UE) to use different IFRI indications when the cell is prohibited, so as to speed up the efficiency of the terminal device in determining the cell reselection operation, and can design a behavior rule when a RedCap-specific IFRI is not sent, so as to clarify how the terminal device (RedCap UE) determines the same-frequency reselection operation.

[0078] The method provided by the embodiment of the present application will be described in detail below in conjunction with the accompanying drawings. It should be noted that in the process of describing the embodiments in conjunction with the accompanying drawings below, the drawings are only for ease of understanding and should not constitute any limitation to the present application. The names of the network elements are only defined to distinguish different functions and should not constitute any limitation to the present application. The present application does not exclude the possibility of defining other network elements to implement the same or similar functions.

[0079] Figure 2 It is a schematic flow chart of a communication method provided in an embodiment of the present application, and the method includes at least the following steps.

[0080] S210, the network device sends a master information block MIB to the terminal device, and accordingly, the terminal device receives the master information block MIB sent by the network device, and the master information block MIB includes first indication information and second indication information. The first indication information is used to indicate whether the cell is prohibited, and the second indication information is used to indicate whether the same-frequency reselection operation is allowed.

[0081] S220: When the first indication information indicates that the cell is prohibited, the terminal device determines whether to perform a same-frequency reselection operation according to the second indication information.

[0082] Specifically, the terminal device may be a RedCap UE with reduced capability, the first indication information may be the cellBarred field in the MIB, and the second indication information may be the intraFreqReselection field in the MIB.

[0083] In a possible implementation, the cellBarred field in the MIB received by the terminal device indicates that the cell is barred, for example, the cellBarred field is set to "barred", at which time the terminal device determines that it cannot reside in the current cell. In this case, the terminal device determines whether to perform the intra-frequency reselection operation according to the second indication information (the intraFreqReselection field in the MIB).

[0084] Specifically, if the intraFreqReselection field in the MIB indicates that the intra-frequency reselection operation is allowed, for example, the intraFreqReselection field is set to "allowed", the terminal device can consider the intra-frequency neighboring cell of the current cell as a candidate cell for cell reselection.

[0085] If the intraFreqReselection field in the MIB indicates that the intra-frequency reselection operation is not allowed, for example, the intraFreqReselection field is set to "not allowed", the terminal device (within a certain period of time) does not consider the intra-frequency neighboring cell of the current cell as a candidate cell for cell reselection.

[0086] It should be understood that the cell / current cell is the cell that sends the above-mentioned MIB / SIB1 information.

[0087] It should be understood that the co-frequency neighboring cell of the current cell can be understood as a neighboring cell with the same frequency as the current cell. For example, it can be a neighboring cell with the same frequency as the synchronization signal / physical broadcast channel block (SSB) of the cell.

[0088] Based on the above technical solution, the terminal equipment (RedCap UE) can use different IFRI indications when the cell is prohibited, so as to speed up the efficiency of the terminal equipment in determining to perform a cell reselection operation.

[0089] Figure 3 It is a schematic flow chart of a communication method provided in an embodiment of the present application, and the method includes at least the following steps.

[0090] S310, the network device sends first information to the terminal device, and correspondingly, the terminal device receives the first information.

[0091] S320, when the first information does not include the third indication information, the terminal device determines that the same-frequency reselection operation is allowed, wherein the third indication information is used to indicate whether the same-frequency reselection operation is allowed.

[0092] Specifically, the terminal device may be a RedCap UE with reduced capability, the first information may be system information block 1 SIB1, and the third indication information may be a RedCap specific intraFreqReselection field in SIB1.

[0093] In a possible implementation, the terminal device receives the first information SIB1. If the first information SIB1 does not include the RedCap specific intraFreqReselection field, the terminal device determines that the same-frequency reselection operation is allowed, that is, the terminal device can consider that the same-frequency reselection operation is allowed. Then the terminal device can consider the same-frequency neighboring cell of the current cell as a candidate cell for cell reselection.

[0094] In one possible implementation, the terminal device receives the first information SIB1. If the first information SIB1 does not include the RedCap specific intraFreqReselection field, the terminal device obtains the intraFreqReselection field in the MIB and determines whether to perform the same-frequency reselection operation based on the intraFreqReselection field in the MIB.

[0095] Specifically, if the intraFreqReselection field in the MIB indicates that the intra-frequency reselection operation is allowed, for example, the intraFreqReselection field is set to "allowed", the terminal device can consider the intra-frequency neighboring cell of the current cell as a candidate cell for cell reselection.

[0096] If the intraFreqReselection field in the MIB indicates that the intra-frequency reselection operation is not allowed, for example, the intraFreqReselection field is set to "not allowed", the terminal device (within a certain period of time) does not consider the intra-frequency neighboring cell of the current cell as a candidate cell for cell reselection.

[0097] Optionally, before S320, the method may further include S311, the first information received by the terminal device also includes fourth indication information, and the terminal device determines that the current cell of the terminal device is prohibited according to the fourth indication information, wherein the fourth indication information is used to indicate that the current cell is prohibited.

[0098] Specifically, the fourth indication information may be a RedCap specific cellBarred field in SIB1. The terminal device indicates that the cell is barred according to the RedCap specific cellBarred field in SIB1. For example, the RedCap specific cellBarred field is set to "barred", indicating that the current cell is barred, that is, the terminal device determines that it cannot reside in the current cell.

[0099] It should be noted that S311 can be an optional step, that is, S311 can be a condition for executing S320, that is, the terminal device will determine whether SIB1 includes the RedCap specific intraFreqReselection field only when it determines that the current cell is prohibited according to the RedCap specific cellBarred field in SIB1.

[0100] Based on the above technical solution, a behavior rule can be designed when the RedCap specific IFRI is not sent to clarify how the terminal equipment (RedCap UE) determines the same-frequency reselection operation.

[0101] Figure 4 It is a schematic flow chart of a communication method provided in an embodiment of the present application, and the method includes at least the following steps.

[0102] S410, the RedCap UE obtains the MIB, which includes a cellBarred field, and the cellBarred field is used to indicate whether the current cell of the RedCap UE is barred.

[0103] S420, the RedCap UE determines whether the cellBarred field contained in the MIB indicates that the current cell is barred.

[0104] In a possible implementation, if the cellBarred field included in the MIB indicates that the current cell is barred, for example, the cellBarred field is set to "barred", then the terminal device determines that it cannot reside in the current cell. In this case, step S430 is executed.

[0105] S430, the RedCap UE determines whether to perform an intra-frequency reselection operation according to the intraFreqReselection field in the MIB.

[0106] Specifically, if the intraFreqReselection field in the MIB indicates that the intra-frequency reselection operation is allowed, for example, the intraFreqReselection field is set to "allowed", the RedCap UE may consider the intra-frequency neighboring cell of the current cell as a candidate cell for cell reselection.

[0107] If the intraFreqReselection field in the MIB indicates that intra-frequency reselection is not allowed, for example, the intraFreqReselection field is set to "not allowed", the RedCap UE does not consider the intra-frequency neighboring cell of the current cell as a candidate cell for cell reselection (within a certain period of time).

[0108] In another possible implementation, if the cellBarred field in the MIB indicates that the cell is not barred, for example, the cellBarred field is set to "not barred", steps S440 to S460 are performed.

[0109] S440, the RedCap UE obtains SIB1, which includes a RedCap specific cellBarred field, and the RedCap specific cellBarred field is used to indicate whether the current cell of the RedCap UE is barred.

[0110] S450, the RedCap UE determines that the RedCap specific cellBarred field included in SIB1 indicates that the current cell is barred, that is, the RedCap UE determines that it cannot reside in the current cell, and at this time, executes S460.

[0111] It can be understood that the condition for the RedCap UE to determine whether the same-frequency reselection operation can be performed according to the RedCap specific intraFreqReselection field indication in SIB1 may be that the RedCap UE determines that the cell is prohibited according to the RedCap specific cellBarred field in SIB1, that is, the RedCap UE determines that it cannot reside in the current cell.

[0112] Exemplary:

[0113] Assuming that the RedCap-specific cellBarred field indicates that RedCap UEs of 1Rx branch and 2Rx branches are not allowed to reside in the current cell, the RedCap UEs of 1Rx branch and 2Rx branches determine that they cannot reside in the current cell, and subsequently determine whether the same-frequency reselection operation can be performed based on the RedCap-specific intraFreqReselection field indication in SIB1.

[0114] Assuming that the RedCap specific cellBarred field indicates that the RedCap UE of 1Rx branch is not allowed to reside in the current cell, the RedCap UE of 1Rx branch determines that it cannot reside in the current cell, and then determines whether the same frequency reselection operation can be performed according to the RedCap specific intraFreqReselection field indication in SIB1. However, the RedCap UE of 2Rxbranches can reside in the current cell.

[0115] Assuming that the RedCap specific cellBarred field indicates that the RedCap UE of 2Rx branch is not allowed to reside in the current cell, the RedCap UE of 2Rx branch determines that it cannot reside in the current cell, and then determines whether the same frequency reselection operation can be performed according to the RedCap specific intraFreqReselection field indication in SIB1. However, the RedCap UE of 1Rxbranches can reside in the current cell.

[0116] S460, the RedCap UE determines whether to perform an intra-frequency reselection operation according to the RedCap-specific intraFreqReselection field in SIB1.

[0117] Specifically, if the RedCap specific intraFreqReselection field in SIB1 indicates that the same-frequency reselection operation is allowed, the RedCap UE can consider the same-frequency neighboring cell of the current cell as a candidate cell for cell reselection. If the RedCap specific intraFreqReselection field in SIB1 indicates that the same-frequency reselection operation is not allowed, the RedCap UE does not consider the same-frequency neighboring cell of the current cell as a candidate cell for cell reselection (within a certain period of time).

[0118] It should be noted that after executing S430, the Redcap UE no longer needs to obtain SIB1. It can be understood that if S430 is executed, S440-S460 will not be executed.

[0119] Figure 5 It is a schematic flow chart of an access control method provided in an embodiment of the present application, and the method includes at least the following steps.

[0120] S510, the RedCap UE obtains SIB1, which includes a RedCap specific cellBarred field, and the RedCap specific cellBarred field is used to indicate whether the current cell of the RedCap UE is barred.

[0121] S520, the RedCap UE determines that the RedCap specific cellBarred field included in SIB1 indicates that the current cell is barred, for example, the RedCap specific cellBarred field is set to "barred", that is, the RedCap UE determines that it cannot reside in the current cell, and then executes step S530.

[0122] It should be understood that step S520 is an optional step. That is, S520 can be understood as a condition for executing S520, that is, the terminal device will determine whether SIB1 includes the RedCap specific intraFreqReselection field only when it determines that the current cell is barred according to the RedCap specific cellBarred field in SIB1.

[0123] Exemplary:

[0124] Assuming that the RedCap-specific cellBarred field indicates that RedCap UEs of 1Rx branch and 2Rx branches are not allowed to reside in the current cell, the RedCap UEs of 1Rx branch and 2Rx branches determine that they cannot reside in the current cell, and subsequently determine whether the RedCap-specific intraFreqReselection field is included in SIB1.

[0125] Assuming that the RedCap specific cellBarred field indicates that the RedCap UE of 1Rx branch is not allowed to reside in the current cell, the RedCap UE of 1Rx branch determines that it cannot reside in the current cell, and subsequently determines whether the RedCap specific intraFreqReselection field is included in SIB1. However, the RedCap UE of 2Rx branches can reside in the current cell.

[0126] Assuming that the RedCap specific cellBarred field indicates that the RedCap UE of the 2Rx branch is not allowed to reside in the current cell, the RedCap UE of the 2Rx branch determines that it cannot reside in the current cell, and subsequently determines whether the RedCap specific intraFreqReselection field is included in SIB1. However, the RedCap UE of the 1Rx branch can reside in the current cell.

[0127] S530, the RedCap UE determines whether SIB1 contains a RedCap specific intraFreqReselection field.

[0128] In a possible implementation, if SIB1 includes a RedCap specific intraFreqReselection field, step S540 is executed.

[0129] S540, the RedCap UE determines whether to perform an intra-frequency reselection operation according to the RedCap specific intraFreqReselection field.

[0130] Specifically, if the RedCap specific intraFreqReselection field in SIB1 indicates that the same-frequency reselection operation is allowed, the RedCap UE can consider the same-frequency neighboring cell of the current cell as a candidate cell for cell reselection. If the RedCap specific intraFreqReselection field in SIB1 indicates that the same-frequency reselection operation is not allowed, the RedCap UE does not consider the same-frequency neighboring cell of the current cell as a candidate cell for cell reselection (within a certain period of time).

[0131] In another possible implementation, if SIB1 does not include the RedCap specific intraFreqReselection field, step S550 is executed.

[0132] Specifically, if the RedCap UE determines that the SIB1 does not include the RedCap specific intraFreqReselection field, there are two possible implementation methods for the intra-frequency reselection rule of the RedCap UE.

[0133] A possible implementation manner: the RedCap UE considers that the same-frequency reselection operation is allowed. At this time, the RedCap UE may consider the same-frequency neighboring cell of the current cell as a candidate cell for cell reselection.

[0134] Another possible implementation manner: RedCap UE determines whether the intra-frequency reselection operation is possible according to the intraFreqReselection field in the MIB.

[0135] Specifically, if the intraFreqReselection field in the MIB indicates that the intra-frequency reselection operation is allowed, for example, the intraFreqReselection field is set to "allowed", the RedCap UE may consider the intra-frequency neighboring cell of the current cell as a candidate cell for cell reselection.

[0136] If the intraFreqReselection field in the MIB indicates that intra-frequency reselection is not allowed, for example, the intraFreqReselection field is set to "not allowed", the RedCap UE does not consider the intra-frequency neighboring cell of the current cell as a candidate cell for cell reselection (within a certain period of time).

[0137] It should be noted that the methods described above can also be combined, such as Figure 6 As shown, Figure 6 A schematic flow chart of a communication method provided in another embodiment of the present application is shown, which specifically includes the following steps.

[0138] S610, the RedCap UE obtains MIB, which includes a cellBarred field. The cellBarred field is used to indicate whether the current cell of the RedCap UE is barred.

[0139] S620: The RedCap UE determines whether the cellBarred field contained in the MIB indicates that the current cell is barred.

[0140] In a possible implementation, if the cellBarred field included in the MIB indicates that the current cell is barred, for example, the cellBarred field is set to "barred", then the terminal device determines that it cannot reside in the current cell. In this case, step S630 is executed.

[0141] S630, the RedCap UE determines whether to perform an intra-frequency reselection operation according to the intraFreqReselection field in the MIB. S630 is similar to S430, and for the sake of simplicity, this application will not repeat it here.

[0142] In another possible implementation manner, if the cellBarred field in the MIB indicates that the cell is not barred, for example, the cellBarred field is set to "not barred", step S640 is executed.

[0143] S640, the RedCap UE obtains SIB1, which includes a RedCap specific cellBarred field, and the RedCap specific cellBarred field is used to indicate whether the current cell of the RedCap UE is barred.

[0144] Optionally, the method may further include S650, the RedCap UE determines that the RedCap specific cellBarred field included in SIB1 indicates that the current cell is barred, for example, the RedCap specific cellBarred field is set to "barred", that is, the RedCap UE determines that it cannot reside in the current cell, and then executes S660.

[0145] It should be understood that step S650 is an optional step. That is, S650 can be understood as a condition for executing S660, that is, the terminal device will determine whether SIB1 includes the RedCap specific intraFreqReselection field only when it determines that the current cell is barred according to the RedCap specific cellBarred field in SIB1.

[0146] Exemplary:

[0147] Assuming that the RedCap-specific cellBarred field indicates that RedCap UEs of 1Rx branch and 2Rx branches are not allowed to reside in the current cell, the RedCap UEs of 1Rx branch and 2Rx branches determine that they cannot reside in the current cell, and subsequently determine whether the RedCap-specific intraFreqReselection field is included in SIB1.

[0148] Assuming that the RedCap specific cellBarred field indicates that the RedCap UE of 1Rx branch is not allowed to reside in the current cell, the RedCap UE of 1Rx branch determines that it cannot reside in the current cell, and subsequently determines whether the RedCap specific intraFreqReselection field is included in SIB1. However, the RedCap UE of 2Rx branches can reside in the current cell.

[0149] Assuming that the RedCap specific cellBarred field indicates that the RedCap UE of the 2Rx branch is not allowed to reside in the current cell, the RedCap UE of the 2Rx branch determines that it cannot reside in the current cell, and subsequently determines whether the RedCap specific intraFreqReselection field is included in SIB1. However, the RedCap UE of the 1Rx branch can reside in the current cell.

[0150] S660, the RedCap UE determines whether SIB1 contains a RedCap specific intraFreqReselection field.

[0151] In a possible implementation, if SIB1 includes a RedCap specific intraFreqReselection field, step S670 is executed.

[0152] S670, the RedCap UE determines whether to perform an intra-frequency reselection operation according to the RedCap specific intraFreqReselection field. S670 is similar to S540, and for the sake of simplicity, this application will not repeat it here.

[0153] In another possible implementation, if SIB1 does not include the RedCap specific intraFreqReselection field, step S680 is executed.

[0154] Specifically, if the RedCap UE determines that the SIB1 does not include the RedCap specific intraFreqReselection field, there are two possible implementation methods for the intra-frequency reselection rule of the RedCap UE.

[0155] A possible implementation manner: the RedCap UE considers that the same-frequency reselection operation is allowed. At this time, the RedCap UE may consider the same-frequency neighboring cell of the current cell as a candidate cell for cell reselection.

[0156] Another possible implementation manner: RedCap UE determines whether the intra-frequency reselection operation is possible according to the intraFreqReselection field in the MIB.

[0157] Specifically, if the intraFreqReselection field in the MIB indicates that the intra-frequency reselection operation is allowed, for example, the intraFreqReselection field is set to "allowed", the RedCap UE may consider the intra-frequency neighboring cell of the current cell as a candidate cell for cell reselection.

[0158] If the intraFreqReselection field in the MIB indicates that intra-frequency reselection is not allowed, for example, the intraFreqReselection field is set to "not allowed", the RedCap UE does not consider the intra-frequency neighboring cell of the current cell as a candidate cell for cell reselection (within a certain period of time).

[0159] Through the above technical solution, the terminal device (RedCap UE) can use different IFRI indications when the cell is prohibited, so as to speed up the efficiency of the terminal device in determining the cell reselection operation, and can design a behavior rule when a RedCap specific IFRI is not sent, so as to clarify how the terminal device (RedCap UE) determines the same-frequency reselection operation.

[0160] The various embodiments described herein may be independent solutions or may be combined according to internal logic, and all of these solutions fall within the protection scope of this application.

[0161] It can be understood that in the above-mentioned various method embodiments, the methods and operations implemented by various devices can also be implemented by components (such as chips or circuits) of the corresponding devices.

[0162] The above mainly introduces the scheme provided by the embodiments of the present application from the perspective of various interactions. It can be understood that each network element, such as a transmitting device or a receiving device, includes a hardware structure and / or software module corresponding to each function in order to implement the above functions. Those skilled in the art should be aware that, in combination with the units and algorithm steps of each example described in the embodiments disclosed in this document, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in hardware or in a computer software-driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0163] The embodiment of the present application can divide the functional modules of the transmitting end device or the receiving end device according to the above method example. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

[0164] It should be understood that the specific examples in the embodiments of the present application are only intended to help those skilled in the art to better understand the embodiments of the present application, rather than to limit the scope of the embodiments of the present application.

[0165] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0166] Above, combined Figures 2 to 6 The method provided by the embodiment of the present application is described in detail. Figures 7 to 9 The device provided in the embodiment of the present application is described in detail. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment, so the contents not described in detail can be referred to the method embodiment above, and for the sake of brevity, they will not be repeated here.

[0167] refer to Figure 7 , is a schematic diagram of a communication device provided in an embodiment of the present application. The communication device is used to implement each step of the corresponding terminal device in the above embodiments, such as Figure 7 As shown, the communication device 700 includes a receiving unit 710 and a processing unit 720 .

[0168] In the first embodiment, the communication device is used to implement the steps corresponding to the terminal device in the above embodiments:

[0169] The receiving unit 710 is used to receive a main information block MIB, which includes first indication information and second indication information, the first indication information is used to indicate whether the cell is prohibited, and the second indication information is used to indicate whether an intra-frequency reselection operation is allowed; the processing unit 720 is used to determine whether to perform an intra-frequency reselection operation based on the second indication information when the first indication information indicates that the cell is prohibited, wherein the terminal device is a terminal with reduced capability RedCap UE.

[0170] In the second embodiment, the communication device is used to implement the steps corresponding to the terminal device in the above embodiments:

[0171] The receiving unit 710 is used to receive first information; the processing unit 720 is used to determine whether the same-frequency reselection operation is allowed when the first information does not include third indication information, wherein the third indication information is used to indicate whether the same-frequency reselection operation is allowed.

[0172] Optionally, in some embodiments, the first information also includes fourth indication information, and the processing unit 720 is further used to: determine whether the current cell of the terminal device is prohibited according to the fourth indication information, and the fourth indication information is used to indicate whether the current cell of the terminal device is prohibited.

[0173] Optionally, in some embodiments, the terminal device is a reduced capability terminal RedCap UE.

[0174] refer to Figure 8 , is a schematic diagram of a communication device provided in an embodiment of the present application. The communication device is used to implement each step of the corresponding network device in the above embodiments, such as Figure 8 As shown, the communication device 800 includes a sending unit 810 and a processing unit 820.

[0175] In the first embodiment, the communication device is used to implement the steps of the corresponding network device in the above embodiments:

[0176] The sending unit 810 is used to send a main information block MIB, which includes a first indication information and a second indication information, the first indication information is used to indicate whether the cell is prohibited, and the second indication information is used to indicate whether an intra-frequency reselection operation is allowed; the processing unit 820, when the first indication information indicates that the cell is prohibited, the second indication information is used to indicate whether the terminal device performs an intra-frequency reselection operation, wherein the terminal device is a terminal with reduced capability RedCap UE.

[0177] In the second embodiment, the communication device is used to implement the steps corresponding to the network devices in the above embodiments:

[0178] The sending unit 810 is used to send the first information; the processing unit 820 is used to instruct the terminal device to determine whether the same-frequency reselection operation is allowed when the first information does not include the third indication information, wherein the third indication information is used to indicate whether the same-frequency reselection operation is allowed.

[0179] Optionally, in some embodiments, the first information also includes fourth indication information, and the processing unit 820 is further used to: the fourth indication information is used to indicate that the current cell of the terminal device is prohibited.

[0180] Optionally, in some embodiments, the terminal device is a reduced capability terminal RedCap UE.

[0181] It should be understood that the division of the units in the above communication device is only a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. And the units in the communication device can all be implemented in the form of software calling through processing elements; they can also be all implemented in the form of hardware; some units can also be implemented in the form of software calling through processing elements, and some modules can be implemented in the form of hardware. For example, each unit can be a separately established processing element, or it can be integrated in a chip of the communication device. In addition, it can also be stored in a memory in the form of a program, and a processing element of the communication device calls and executes the function of the module. In addition, all or part of these units can be integrated together, or they can be implemented independently. The processing element described here can also be a processor, which can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each module above can be implemented by an integrated logic circuit of hardware in the processor element or in the form of software calling through a processing element.

[0182] In one example, the unit in any of the above communication devices may be one or more integrated circuits configured to implement the above method, such as: one or more application specific integrated circuits (ASIC), or one or more microprocessors (digital singnal processors, DSP), or one or more field programmable gate arrays (FPGA), or a combination of at least two of these integrated circuit forms. For another example, when the unit in the communication device can be implemented in the form of a processing element scheduler, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call a program. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0183] refer to Fig. 9 , is a schematic diagram of a communication device provided in an embodiment of the present application, which is used to implement the operations of the terminal device and the network device in the above embodiments. Fig. 9As shown, the communication device includes: a processor 910 and an interface 930, and the processor 910 is coupled to the interface 930. The interface 930 is used to communicate with other devices. The interface 930 can be a transceiver or an input-output interface. The interface 930 can be, for example, an interface circuit. Optionally, the communication device also includes a memory 920, which is used to store instructions executed by the processor 910 or to store input data required by the processor 910 to run the instructions or to store data generated after the processor 910 runs the instructions.

[0184] The method performed by the terminal device and the network device in the above embodiments can be implemented by the processor 910 calling the program stored in the memory (which can be the memory 920 in the terminal device and the network device, or it can be an external memory). That is, the terminal device and the network device may include a processor 910, and the processor 910 executes the method performed by the terminal device and the network device in the above method embodiment by calling the program in the memory. The processor here can be an integrated circuit with signal processing capabilities, such as a CPU. The terminal device and the network device can be implemented by configuring one or more integrated circuits to implement the above method. For example: one or more ASICs, or one or more microprocessors DSPs, or one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms. Alternatively, the above implementation can be combined.

[0185] Specifically, Figure 7 and Figure 8 The functions / implementation processes of each unit can be Fig. 9 The processor 910 in the communication device 900 shown calls the computer executable instructions stored in the memory 920 to implement. Or, Figure 7 and Figure 8 The function / implementation process of the processing unit in can be Fig. 9 The processor 910 in the communication device 900 shown calls the computer execution instructions stored in the memory 920 to implement, Figure 7 and Figure 8 The function / implementation process of the receiving unit or the sending unit in can be achieved by Fig. 9 The interface 930 in the communication device 900 shown in FIG.

[0186] It should be understood that the processing unit in the above-mentioned device includes a processor, the processor is coupled to a memory, the memory is used to store computer programs or instructions and / or data, and the processor is used to execute the computer programs or instructions and / or data stored in the memory, so that the method in the above method embodiment is executed.

[0187] It should also be understood that the division of units in the above device is only a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. And the units in the device can all be implemented in the form of software calling through processing elements; they can also be all implemented in the form of hardware; some units can also be implemented in the form of software calling through processing elements, and some units can be implemented in the form of hardware. For example, each unit can be a separately established processing element, or it can be integrated in a certain chip of the device. In addition, it can also be stored in the memory in the form of a program, and called and executed by a certain processing element of the device. The processing element here can also be called a processor, which can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each unit above can be implemented by an integrated logic circuit of hardware in the processor element or in the form of software calling through a processing element.

[0188] The present application also provides a computer-readable storage medium on which a computer program for implementing the method in the above method embodiment is stored. When the computer program is run on a computer, the computer can implement the method in the above method embodiment.

[0189] The embodiment of the present application also provides a system chip, which includes: a processing unit and a communication unit, the processing unit, for example, may be a processor, and the communication unit, for example, may be an input / output interface, a pin or a circuit, etc. The processing unit may execute computer instructions to enable the chip in the communication device to execute any one of the communication methods provided in the embodiment of the present application.

[0190] The above-mentioned processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above-mentioned method embodiment can be completed by the hardware integrated logic circuit in the processor or the instruction in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor to be executed, or the hardware and software modules in the decoding processor are combined to be executed. The software module may be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the message in the memory and completes the steps of the above-mentioned method in combination with its hardware.

[0191] It is understood that the storage element in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an 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), synchronous link DRAM (SLDRAM), and direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0192] It should be understood that "one embodiment" or "an embodiment" mentioned in the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does 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 in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0193] Additionally, the terms "system" and "network" are often used interchangeably herein.

[0194] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0195] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0196] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0197] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0198] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0199] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0200] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A communication method, applied to a terminal device or a chip in a terminal device, characterized in that: The method comprises: Receiving a master information block MIB, wherein a cellBarred field in the MIB is used to indicate whether a cell is barred; Receive system information block 1 SIB1; If the cellBarred field in the MIB indicates that the cell is barred, determining that the cell is barred; If the SIB1 does not include the RedCap specific intraFreqReselection field, intra-frequency reselection is allowed; The terminal device is a reduced capability terminal RedCap UE, the RedCap specific intraFreqReselection field indicates whether the RedCap UE is allowed to perform intra-frequency reselection, and the cell is a cell that receives the SIB1.

2. The method according to claim 1, characterized in that The method further comprises: If the cellBarred field in the MIB indicates that the cell is not barred, If the SIB1 does not include the RedCap specific intraFreqReselection field, intra-frequency reselection is allowed.

3. The method according to claim 1 or 2, characterized in that: The terminal device is a 1Rx branch RedCap UE or a 2Rx branches RedCap UE.

4. The method according to claim 1 or 2, characterized in that: The method further comprises: If the cellBarred field in the MIB indicates that the cell is not barred, If the SIB1 includes a RedCap specific intraFreqReselection field, determining whether intra-frequency reselection is allowed according to the RedCap specific intraFreqReselection field; The terminal device is a 1Rx branch RedCap UE, and the RedCap specific cellBarred field in the SIB1 indicates that the RedCap UE of the 1Rx branch is not allowed to reside in the cell.

5. The method according to claim 1 or 2, characterized in that: The method further comprises: If the cellBarred field in the MIB indicates that the cell is not barred, If the SIB1 includes a RedCap specific intraFreqReselection field, determining whether intra-frequency reselection is allowed according to the RedCap specific intraFreqReselection field; The terminal device is a 2Rx branches RedCap UE, and the RedCap specific cellBarred field in the SIB1 indicates that the RedCap UE of 2Rx branches is not allowed to reside in the cell.

6. The method according to any one of claims 1 to 5, characterized in that: The terminal device is in a radio resource control RRC idle state or an RRC inactive state.

7. The method according to any one of claims 1 to 6, characterized in that: The cell is a cell that receives the MIB.

8. A communication method, applied to a network device or a chip in a network device, characterized in that: The method comprises: Sending a master information block MIB, wherein the cellBarred field in the MIB is used to indicate whether the cell is barred; Send system information block 1 SIB1; If the cellBarred field in the MIB indicates that the cell is barred, If the SIB1 does not include a RedCap-specific intraFreqReselection field, the terminal device is allowed to perform intra-frequency reselection; wherein the terminal device is a reduced capability terminal RedCap UE, the RedCap-specific intraFreqReselection field indicates whether the RedCap UE is allowed to perform intra-frequency reselection, and the cell is the cell that sends the SIB1.

9. The method according to claim 8, characterized in that The method further comprises: If the cellBarred field in the MIB indicates that the cell is not barred, If the SIB1 does not include the RedCap specific intraFreqReselection field, the terminal device is allowed to perform intra-frequency reselection.

10. The method according to claim 8 or 9, characterized in that: The terminal device is a 1Rx branch RedCap UE or a 2Rx branches RedCap UE.

11. The method according to claim 8 or 9, characterized in that: The method further comprises: If the cellBarred field in the MIB indicates that the cell is not barred, If the SIB1 includes a RedCap specific intraFreqReselection field, If the RedCap specific intraFreqReselection field indicates that the terminal device is allowed to perform intra-frequency reselection, the terminal device is allowed to perform intra-frequency reselection; The terminal device is a 1Rx branch RedCap UE, and the RedCap specific cellBarred field in the SIB1 indicates that the RedCap UE of the 1Rx branch is not allowed to reside in the cell.

12. The method according to claim 8 or 9, characterized in that: The method further comprises: If the cellBarred field in the MIB indicates that the cell is not barred, If the SIB1 includes a RedCap specific intraFreqReselection field, If the RedCap specific intraFreqReselection field indicates that the terminal device is not allowed to perform intra-frequency reselection, the terminal device is not allowed to perform intra-frequency reselection; The terminal device is a 1Rx branch RedCap UE, and the RedCap specific cellBarred field in the SIB1 indicates that the RedCap UE of the 1Rx branch is not allowed to reside in the cell.

13. The method according to claim 8 or 9, characterized in that: The method further comprises: If the cellBarred field in the MIB indicates that the cell is not barred, If the SIB1 includes a RedCap specific intraFreqReselection field, If the RedCap specific intraFreqReselection field indicates that the terminal device is allowed to perform intra-frequency reselection, the terminal device is allowed to perform intra-frequency reselection; The terminal device is a 2Rx branches RedCap UE, and the RedCap specific cellBarred field in the SIB1 indicates that the RedCap UE of 2Rx branches is not allowed to reside in the cell.

14. The method according to claim 8 or 9, characterized in that: The method further comprises: If the cellBarred field in the MIB indicates that the cell is not barred, If the SIB1 includes a RedCap specific intraFreqReselection field, If the RedCap specific intraFreqReselection field indicates that the terminal device is not allowed to perform intra-frequency reselection, the terminal device is not allowed to perform intra-frequency reselection; The terminal device is a 2Rx branches RedCap UE, and the RedCap specific cellBarred field in the SIB1 indicates that the RedCap UE of 2Rx branches is not allowed to reside in the cell.

15. The method according to any one of claims 8 to 14, characterized in that: The terminal device is in a radio resource control RRC idle state or an RRC inactive state.

16. The method according to any one of claims 8 to 15, characterized in that: The cell is the cell that sends the MIB.

17. A communication device, comprising a processor, a memory and an interface, wherein the interface is coupled to the processor and is used to communicate with other devices, the memory is coupled to the processor, and the memory stores a computer program or instructions, and when the computer program or instructions are executed by the processor, the method described in any one of claims 1 to 7 is executed or implemented.

18. A communication device, comprising a processor, a memory and an interface, wherein the interface is coupled to the processor and is used to communicate with other devices, the memory is coupled to the processor, and the memory stores a computer program or instructions, and when the computer program or instructions are executed by the processor, the method described in any one of claims 8 to 16 is executed or implemented.

19. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program or instruction, and when the computer program or instruction is executed, the method according to any one of claims 1 to 7 is executed or implemented.

20. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program or instruction, and when the computer program or instruction is executed, the method according to any one of claims 8 to 16 is executed or implemented.

21. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is run, the method according to any one of claims 1 to 7 is executed or implemented.

22. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is run, the method according to any one of claims 8 to 16 is executed or implemented.

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