Conversation method and electronic equipment

Abstract

The embodiment of the invention provides a call method and electronic equipment, and relates to the technical field of communication. The problem that the cross-communication system is triggered due to the fact that the signal of the first network system is relatively weak is solved. The specific solution is: a UE receives RRC reconfiguration information from a first network device, the RRC reconfiguration information comprising a reporting condition corresponding to a target measurement event, the reporting condition being a condition required to be satisfied by the signal strength of a first signal and / or a second signal; the first signal is a radio signal sent by a first network device of a first network type, and the second signal is a radio signal sent by a second network device of a second network type; when the first signal and / or the second signal detected by the UE satisfies a reporting condition and satisfies a preset condition, the UE inhibits reporting of a measurement report of a target measurement event to the first network device; wherein the preset condition comprises that the signal intensity of the first signal is greater than a first threshold value.

Description

[0001] This application claims the priority of a Chinese patent application titled "A Method and Device for Calls" with the application number 202311849717.9 filed with the National Intellectual Property Administration on December 28, 2023, the entire content of which is incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technologies, and in particular, to a method for calls and an electronic device. Background Art

[0003] With the development of the fifth generation (5G), there are more and more services based on 5G technology. For example, voice services are transmitted through the new radio (NR) air interface of 5G technology, and the voice services transmitted through the NR air interface of 5G technology can be referred to as voice over new radio (VoNR).

[0004] During the execution of communication services (such as VONR calls) by a user equipment (UE), the NR signal becomes relatively weak, and the UE may be redirected or switched to LTE. During this process, communication service anomalies may occur, such as call drops. Summary of the Invention

[0005] Embodiments of this application provide a method for calls and an electronic device to improve the quality of communication services.

[0006] To achieve the above objective, the embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, embodiments of this application provide a method for calls, the method including:

[0008] The UE receives RRC reconfiguration information from a first network device.

[0009] Exemplarily, the above RRC reconfiguration information includes reporting conditions corresponding to target measurement events. Among them, the above target measurement events may include one or more of event B1 and event B2. Each target measurement event corresponds to a reporting condition. In addition, the reporting condition is to configure a measurement report that meets the target measurement event for reporting. In addition, the above reporting condition may be a condition that the signal strength of a first signal and / or a second signal needs to meet. The first signal is a radio signal sent by a first network device of a first network mode, and the second signal is a radio signal sent by a second network device of a second network mode. Among them, the first network mode is higher than the second network mode.

[0010] When the first signal and / or the second signal detected by the UE meet the reporting conditions and meet the preset conditions, the UE suppresses the measurement report of the target measurement event reported to the first network device. Among them, the above preset conditions include that the signal strength of the first signal is greater than the first threshold.

[0011] In the above embodiment, when the UE identifies that the current reporting conditions configured by the first network device are met, if it is detected that the signal quality of the first network device can still support the normal execution of communication services, for example, the signal strength of the first signal is greater than the first threshold, the UE can suppress sending a measurement report to the first network device, avoid triggering the network device to be accessed for handover, and also avoid the UE from switching the accessed communication system.

[0012] Compared with the case of immediately sending a measurement report to the first network device when the reporting conditions are met, the method provided in the above embodiment reduces the probability of the UE switching communication systems while ensuring the normal execution of communication services, and avoids the impact on the communication services being executed caused by crossing communication systems.

[0013] In some embodiments, the above preset condition may be that the signal strength of the first signal is greater than the first threshold. In this way, in the scenario where the first signal becomes relatively weak or temporarily weak, the above preset condition can reduce the probability of the UE crossing communication systems while ensuring the normal execution of communication services.

[0014] In other embodiments, the above preset condition may also be that the target signal strength difference is less than or equal to the target threshold, where the target signal strength difference is the difference between the signal strength of the second signal and the signal strength of the first signal. Among them, the target signal strength difference being less than or equal to the target threshold can also be replaced by the target signal strength difference being greater than the target threshold, where the target signal strength difference is the difference between the signal strength of the first signal and the signal strength of the second signal. In this way, when the signal strength of the inter-system neighboring cell (second network mode) with a network mode lower than that of the current serving cell is not much different from the signal strength of the serving cell (first network mode), the communication system handover is not triggered, ensuring that the communication services being executed are not affected. It also avoids the occurrence of the following situation: after switching the communication system, the communication quality is not improved.

[0015] In other embodiments, the above preset condition may also be: the signal strength of the first signal is greater than the first threshold, and the target signal strength difference is less than or equal to the target threshold. The target signal strength difference is the difference between the signal strength of the second signal and the signal strength of the first signal. In this way, when the signal strength of the inter-system neighboring cell is not much different from the signal strength of the serving cell, unnecessary communication system handovers of the UE are avoided, ensuring that the communication services being executed are not affected.

[0016] In some embodiments, when the UE is performing a call service, the target threshold is the second threshold; when the UE is not performing a call service, the target threshold is the third threshold. Wherein, the second threshold is greater than the third threshold.

[0017] During the call service, the UE raises the requirements for the communication system to transfer from the first network mode to the second network mode to avoid call drops. Of course, during the period when the call service is not being performed, the probability of the UE transferring from the first network mode to the second network mode can also be reduced by the target threshold assigned as the third threshold to avoid unnecessary handovers.

[0018] In some embodiments, when the first signal and / or the second signal detected by the UE meet the reporting conditions and do not meet the preset conditions, the UE reports a measurement report of the target measurement event to the first network device; in response to the handover indication information of the first network device, the UE transfers from the first network device of the first network mode to the second network device of the second network mode.

[0019] Among them, the above-mentioned manner of not meeting the preset conditions may include any one of the following:

[0020] The signal strength of the first signal is less than or equal to the first threshold.

[0021] The target signal strength difference is greater than the target threshold.

[0022] When the signal strength of the first signal is greater than the first threshold, the target signal strength difference is greater than the target threshold.

[0023] In some embodiments, the first network mode is NR and the second network mode is LTE.

[0024] In some embodiments, the value of the first threshold is related to one or more of the following: the current location information of the UE, the itinerary information configured in the UE, the motion state of the UE, the frequency band of the first network device, the frequency band of the second network device, or the duplex mode enabled by the UE.

[0025] In some embodiments, the value of the second threshold is related to one or more of the following: the current location information of the UE, the itinerary information configured in the UE, the motion state of the UE, the frequency band of the first network device, the frequency band of the second network device, or the duplex mode enabled by the UE.

[0026] In some embodiments, the value of the third threshold is related to one or more of the following: the current location information of the UE, the itinerary information configured in the UE, the motion state of the UE, the frequency band of the first network device, the frequency band of the second network device, or the duplex mode enabled by the UE.

[0027] In the above embodiments, the values of the first threshold, the second threshold, and / or the third threshold can be dynamically adjusted according to the change of the scenario. The above scenario can be indicated by one or more of the current location information of the UE, the configured trip information in the UE, the motion state of the UE, the frequency band of the first network device, the frequency band of the second network device, or the duplex mode enabled by the UE. In this way, through the first threshold, the second threshold, and the third threshold, the accuracy of deciding whether to transfer to the second network device of the second network mode is higher.

[0028] In some embodiments, the target measurement event is a B event, and the B event is an event configured by the first network device for triggering a handover to a different communication system.

[0029] Exemplarily, the above B event may be a B2 event, and the reporting conditions corresponding to the B2 event include: the signal strength of the detected first signal is less than the first threshold value, and the signal strength of the detected second signal is greater than the second threshold value. Exemplarily, the first threshold value is greater than the first threshold.

[0030] In some embodiments, before the UE receives the RRC reconfiguration information from the first network device, the method further includes: the UE camps on the cell corresponding to the first network device.

[0031] In a second aspect, an embodiment of the present application provides a method for a call, and the method includes: the UE camps on cell B of the first network mode; the UE receives an RRC reconfiguration message sent by the network side, and the RRC reconfiguration message configures the reporting conditions of the B event; when the first condition is satisfied, the UE reports a measurement report of the B event to the network side, where the first condition includes: cell A of the second network mode satisfies the reporting conditions of the B event, and the signal value of cell B is less than or equal to the first threshold; where the first network mode is higher than the second network mode; when the second condition and the third condition are satisfied, the UE reports a measurement report of the B event to the network side; when the second condition is satisfied but the third condition is not satisfied, the UE suppresses reporting a measurement report of the B event to the network side; where the second condition includes: cell A satisfies the reporting conditions of the B event, and the signal value of cell B is greater than the threshold 1; the third condition includes: the UE is currently in a call service, and the difference between the signal value of cell A and the signal value of cell B is greater than the second threshold, or, the UE is not currently in a call service, and the difference between the signal value of cell A and the signal value of cell B is greater than the third threshold, where the second threshold is greater than the third threshold.

[0032] In a third aspect, an embodiment of the present application provides an electronic device, including: a processor and a memory; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, so that the electronic device executes the methods provided by the first aspect, the second aspect, and their possible implementation manners.

[0033] In a fourth aspect, an embodiment of the present application provides a chip system, including at least one processor and a communication interface, the communication interface and the at least one processor are interconnected by a line, and the at least one processor is configured to run a computer program or instruction to execute the methods provided by the first aspect, the second aspect, and their possible implementation manners.

[0034] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program / instruction is stored, and when the computer program / instruction is executed by a processor, the methods provided by the first aspect, the second aspect, and their possible implementation manners are implemented.

[0035] In a sixth aspect, an embodiment of the present application provides a computer program product, including a computer program / instruction, and when the computer program / instruction is executed by a processor, the methods provided by the first aspect, the second aspect, and their possible implementation manners are implemented.

[0036] It can be understood that the electronic devices, computer storage media, and computer program products provided by the above aspects are all applied to the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods provided above, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 FIG. is a schematic structural diagram of a communication system provided by an embodiment of the present application;

[0038] Figure 2 FIG. is an example diagram of a communication system capable of implementing VoNR calls provided by an embodiment of the present application;

[0039] Figure 3 FIG. is an example diagram of steps for a UE to redirect or handover (HO) from NR to LTE during a VoNR call;

[0040] Figure 4 FIG. is one of the flowcharts of a method for calls provided by an embodiment of the present application;

[0041] Figure 5 FIG. is another flowchart of a method for calls provided by an embodiment of the present application;

[0042] Figure 6 FIG. is yet another flowchart of a method for calls provided by an embodiment of the present application;

[0043] Figure 7 This is a schematic diagram of the hardware structure of the UE provided in the embodiments of the present application;

[0044] Figure 8 This is a schematic diagram of the software structure of the UE provided in the embodiments of the present application. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application. Among them, in the description of the present application, unless otherwise specified, "at least one" means one or more, and "a plurality" means two or more. In addition, for the convenience of clearly describing the technical solutions in the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the terms "first", "second", etc. do not limit the quantity and execution order, and the terms "first", "second", etc. do not necessarily limit being different.

[0046] The technical solutions in the embodiments of the present application can be applied to various communication systems, such as wireless fidelity (WiFi) systems, vehicle to everything (V2X) communication systems, device-to-device (D2D) communication systems, vehicle networking communication systems, fourth-generation (4G) mobile communication systems, such as long term evolution (LTE) systems, worldwide interoperability for microwave access (WiMAX) communication systems, 5G, such as new radio (NR) systems, and future communication systems, etc. In subsequent embodiments, the terms 4G and LTE can be used interchangeably, and the terms 5G and NR can be used interchangeably.

[0047] The present application will present various aspects, embodiments, or features around a system that may include multiple devices, components, modules, etc. It should be understood and clear that each system may include additional devices, components, modules, etc., and / or may not include all the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. In addition, combinations of these solutions can also be used.

[0048] In addition, in the embodiments of the present application, words such as "exemplary" and "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" in the present application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Rather, the use of the word "exemplary" is intended to present concepts in a specific manner.

[0049] The network architecture and service scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those of ordinary skill in the art will know that with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0050] To facilitate the understanding of the embodiments of the present application, first, Figure 1 taking the communication system shown in Figure 1 as an example, the communication system applicable to the embodiments of the present application will be described in detail. Exemplarily,

[0051] As Figure 1 shown, the communication system mainly includes: user equipment (UE), network device, core network, IP Multimedia Subsystem (IMS) or Internet.

[0052] The UE can be a terminal device with transceiver functions, or a chip or chip system that can be set in the terminal device. The UE can also be referred to as an access terminal, subscriber unit, user station, mobile station (MS), mobile station, remote station, remote terminal, mobile device, terminal, wireless communication device, user agent or user device.

[0053] The UE in the embodiments of this application may be a mobile phone, cellular phone, smart phone, Pad, wireless data card, personal digital assistant (PDA), wireless modem, handset, laptop computer, machine type communication (MTC) terminal, computer with wireless transceiver function, virtual reality (VR) terminal, augmented reality (AR) terminal, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, in-vehicle terminal, roadside unit (RSU) with terminal function, etc. The terminal of this application may also be an in-vehicle module, in-vehicle module group, in-vehicle component, in-vehicle chip or in-vehicle unit built into a vehicle as one or more components or units.

[0054] The network device is an access network (AN) device, or can be called a radio access network (RAN) device. The RAN device can provide access functions for UEs and is responsible for functions such as radio resource management on the air interface side, quality of service (QoS) management, data compression, and encryption. The RAN device can include 5G, such as the gNB in the NR system, or one or a group (including multiple antenna panels) of antenna panels of the base station in 5G. Or, it can also be a network node that constitutes a gNB, a transmission and reception point (TRP) or a transmission point (TP), or a transmission measurement function (TMF), such as a building base band unit (BBU), or a centralized unit (CU) or a distributed unit (DU), an RSU with base station functions, or a wired access gateway, or a core network element of 5G. Or, the RAN device can also include an access point (AP) in the wireless fidelity (WiFi) system, a wireless relay node, a wireless backhaul node, various forms of macro base stations, micro base stations (also called small stations), relay stations, access points, wearable devices, vehicle-mounted devices, and so on. Or, the RAN device can also include an access network device of the next-generation mobile communication system, such as a 6G base station. Or, in the next-generation mobile communication system, the network device can also have other naming methods, all of which are covered by the protection scope of the embodiments of this application, and this application makes no limitations in this regard.

[0055] The core network provides user connections, user management, and service bearer, and serves as a bearer network to provide an interface to the external network. The establishment of user connections includes functions such as mobility management (MM), call management (CM), switching / routing, and announcement recording (combining intelligent network services to complete the connection relationship to intelligent network peripheral devices).

[0056] It is understandable that the core network of the 4G network is the Evolved Packet Core (EPC) network. The EPC network is the core network of the 4G mobile communication network. It belongs to the category of core networks and has the traditional capabilities of mobile networks such as user subscription data storage, mobility management, and data exchange, and can provide users with an ultra-high-speed Internet experience. The core network of the 5G network is 5G Core (which can be abbreviated as 5GC). 5GC will use general network function virtualization devices to replace the dedicated communication devices of the 4G network.

[0057] It should be noted that, as Figure 1 shown, the core network can refer to the core network of the 4G (such as LTE) network mode, can also refer to the core network of the 5G (such as NR) network mode, and can also refer to the core network that integrates the 4G (such as LTE) network mode and the 5G (such as NR) network mode. For example, the core network obtained by integrating EPC and 5GC. That is to say, the core network in this network architecture can include both network elements in EPC and network elements in 5GC. For example, the core network in this network architecture can include network elements such as Access and Mobility Management Function (AMF) network element, Mobility Management Entity (MME) network element, Serving GateWay (SGW) network element, Packet Data Network GateWay (PGW) network element, Session Management Function (SMF) network element, User Plane Function (UPF) network element, Unified Data Management (UDM) network element, and Home Subscriber Server (HSS) network element, etc.

[0058] In this way, the UE can access the core network through the network device of NR, or can also access the core network through the network device of LTE.

[0059] Exemplarily, the core network in this communication system can include integrated network elements obtained from network elements in EPC and network elements in 5GC. For example, SMF+PGW-C, UPF+PGW-U, UDM+HSS, etc. Among them, PGW-C is the control plane node of the PGW network element, and PGW-U is the user plane node of the PGW network element.

[0060] Exemplarily, the core network may include a Proxy Session Border Control (PSBC) network element, which is a co-located network element integrating Session Border Control (SBC), Proxy-Call Session Control Function (Proxy-CSCF, P-CSCF), Access Transfer Control Function (ATCF), and Access Transfer Gateway (ATGW). As an SBC network element, it connects the IMS core network / softswitch network to the external user access area, completes the service access of IMS / softswitch users, realizes the interworking of user services in different network environments, ensures the security of the IMS / softswitch network, supports QoS management, CAC traffic control, media management, CDR media call detail list, and other functions.

[0061] Each network element in the core network can also be referred to as a functional entity, which can be either a network element implemented on dedicated hardware, a software instance running on dedicated hardware, or an instance of a virtualized function on a suitable platform.

[0062] It should be understood that the names of all network elements in this application are merely examples. In future communications, such as in 6G, they can also be referred to by other names, or in future communications, such as in 6G, the network elements involved in this application can also be replaced by other entities or devices with the same functions, and this application does not make any limitations in this regard. A unified description is made here and will not be repeated later. Optionally, the various network elements in the embodiments of this application can be communication devices, or chips or chip systems that can be used in such communication devices, and this application does not make any limitations in this regard.

[0063] It can be understood that the core network may also include other devices, network elements, network entities, or network subsystems, such as a Policy Control function (PCF) network element, and this application does not make any restrictions in this regard. It should be noted that this application does not make any restrictions on the distribution methods of the various network elements in the core network. The specific distribution methods can refer to relevant technical documents, and this application will not elaborate on them here.

[0064] IMS is an architecture that provides voice and multimedia communication services (such as voice, video, and text messages, etc.) based on the Internet Protocol (IP) network. IMS can achieve secure and reliable multimedia communication between different devices. The architecture model provides a unified infrastructure and common mechanisms for controlling, operating, routing, and managing sessions, as well as implementing authentication, authorization, and accounting control. The IMS specification includes recommendations widely used by the Internet Engineering Task Force (IETF). For example, the Session Initialization Protocol (SIP) for session control signaling.

[0065] The Internet generally refers to the Internet, also known as the international network, which refers to the huge network formed by connecting networks with each other. These networks are connected by a set of common protocols, forming a logically single huge international network. From the perspective of network communication, the Internet is a data communication network that connects computer networks in various countries, regions, and institutions around the world through the Transmission Control Protocol (TCP) / Internet Protocol (IP).

[0066] It can be understood that Figure 1 For the sake of easy understanding, it is a simplified schematic diagram shown as an example. Other network devices and / or other UEs may also be included in this communication system, Figure 1 which are not drawn in the figure.

[0067] In some embodiments, the UE in the above communication system can access the communication system corresponding to the network device through the network device. In this way, the UE can execute various communication services based on the accessed communication system. Exemplarily, the above communication services may include call services and network data transmission services (or referred to as Internet access services).

[0068] In some embodiments, when the UE is connected to network devices of different network modes, it can execute various communication services based on communication systems of different modes.

[0069] For example, after the UE accesses the communication system of the first network mode (such as NR) through the network device of the first network mode, it can execute call services based on the communication system of the first network mode, such as voice over NR (VoNR) calls.

[0070] For another example, after the UE accesses the communication system of the second network mode (such as LTE) through the network device of the second network mode, it can perform a call service based on the communication system of the second network mode, such as (voice over LTE, VoLTE) call.

[0071] It can be understood that the above-mentioned first network mode and second network mode refer to two different network modes, and are not limited to NR or LTE. The above-mentioned first network mode or second network mode can also refer to the network mode corresponding to a future communication system (such as 6G). The embodiments of the present application do not make specific limitations in this regard. In addition, the first network mode is higher than the second network mode. For example, the first network mode is 5G and the second network mode is 4G.

[0072] In some embodiments, during normal operation, the UE can select the network device to be accessed. Exemplarily, the UE can monitor the radio signals from the network device. Then, based on the detected radio signals, the UE evaluates the signal quality corresponding to the network device that emits the radio signals. Among them, the above-mentioned radio signals can be synchronization signals and channel state information from the network device. After monitoring the radio signals, the reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal receiving quality (RSRQ), and signal to interference plus noise ratio (SINR) corresponding to the network device can be evaluated. For specific implementation details, reference can be made to related technologies and will not be elaborated here. Then, based on the values of one or more of the detected RSRP, RSSI, RSRQ, and SINR, the UE evaluates the signal quality corresponding to the network device. Then, the UE selects the network device with the best signal quality and accesses it.

[0073] It can be understood that the radio signals emitted by the network device will attenuate during the propagation process, and the signal coverage range of the network device is limited. The area where the radio signals emitted by the network device can be received can be called the service range of the network device. Only the UE located within the service range of the network device can request to access the network device.

[0074] In addition, the service area of the network device can be divided into at least one cell. When the network device includes multiple base stations, the signal coverage ranges of different base stations may vary or overlap. In addition, each cell of the network device corresponds to the signal coverage range of a base station. The base stations corresponding to different cells may be different or the same, and no specific limitation is made thereto.

[0075] In the embodiments of the present application, the network device and the cell can be used interchangeably. The UE camping on a cell can be understood as the UE establishing a connection with the network device corresponding to the cell and maintaining the connection state. During the period when the UE camps on a cell, the UE can access the corresponding communication system through the network device corresponding to the cell and perform communication services.

[0076] Since radio signals attenuate as the propagation distance increases during the propagation process. Thus, the signal quality at different positions within the cell corresponding to the network device is different. In addition, the cell corresponding to the network device may also change, for example, change due to environmental factors or change due to operating power, etc.

[0077] In this scenario (such as, the position of the UE user changes, or the cell range of the network device changes), the UE can trigger the handover of the accessed cell to ensure the communication quality.

[0078] Exemplarily, during the idle period of the UE, the UE can switch between cells of different network modes according to the communication quality of the cell. During the process of the UE performing some communication services (such as the Internet access service), the UE can also switch between cells of different network modes according to the communication quality of the cell. During the process of the UE performing another part of communication services (such as the call service), the UE can switch from the cell of the first network mode to the cell of the second network mode, but cannot switch from the cell of the second network mode to the cell of the first network mode. Among them, the first network mode is higher than the second network mode.

[0079] Taking the first network mode as NR and the second network mode as LTE as an example. During the period when the UE camps on the NR cell, it can respond to user operations and perform the voNR call service. As Figure 2 shown, taking the UE101 camping on the NR cell B, where the cell B corresponds to the network device 103 of the NR network, and taking the UE101 as the calling device (i.e., the terminal initiating the call) and the UE102 as the called device (i.e., the device answering the call) as an example, the process of the UE101 actively initiating a VoNR call to the UE102 is introduced:

[0080] (1) UE101 requests to establish a Radio Resource Control (RRC) connection with network device 103. In this way, UE101 can access the core network 104 through network device 103.

[0081] (2) In response to a user operation, UE101 can send a call request message to core network 104 through network device 103. The call request message carries the identifier of UE102 (such as a phone number).

[0082] (3) UE101 can establish a default bearer corresponding to quality of service class identifier (QCI) 9 and a session initiation protocol (SIP) signaling bearer corresponding to QCI 5.

[0083] Exemplarily, after the above-mentioned default bearer corresponding to QCI 9 and SIP signaling bearer corresponding to QCI 5 are established, UE101 can also maintain bearer information of NR mapped to LTE.

[0084] For example, the above bearer information includes: the correspondence between QCI 9 and "bearer identifier (eps_bearer_id, EBI) = 6". This correspondence indicates the bearer corresponding to EBI6, which is used to transmit data related to Internet services.

[0085] For another example, the above bearer information includes: the correspondence between QCI 5 and "EBI = 5". This correspondence indicates the bearer corresponding to EBI5, which is used to transmit SIP signaling.

[0086] In addition, core network 104 can be communicatively connected to IMS105.

[0087] (4) After core network 104 receives the call request message from UE101, it can also send a response message to UE101 through network device 103, indicating that core network 104 is processing the outgoing call initiated by UE101. In addition, core network 104 can also send a call request message to UE102 through IMS105 to implement paging UE102.

[0088] (5) UE102 establishes an RRC connection with network device 106 and accesses the corresponding core network 107 through network device 106. In this way, UE102 can receive paging from IMS105, such as a call request message from UE101.

[0089] Exemplarily, after UE102 receives call request information, UE102 and UE101 perform SIP session negotiation through IMS105. For example, information such as coding method, IP address, and port number is negotiated.

[0090] (6) After the negotiation is completed, UE101 can also establish a QCI1 data radio bearer for transmitting multimedia data such as audio and video. UE102 can also establish a QCI1 data radio bearer for transmitting multimedia data such as audio and video.

[0091] After the QCI1 data radio bearer is created, the bearer information of NR mapped to LTE maintained in UE101 further includes: the correspondence between QCI1 and "EBI = 7". This correspondence indicates the bearer corresponding to EBI7 for transmitting voice data. The same is true for UE102 side and will not be elaborated here for the time being.

[0092] (7) After that, UE102 can remind the user of an incoming call from UE101 by means of ringing, displaying, etc. After UE102 detects the operation of the user answering the incoming call, UE101 and UE102 can transmit voice data through the corresponding 5G system and IMS105 to start a VONR call.

[0093] It can be understood that the above steps (1)-(7) are simplified examples. In the actual implementation of the VONR call between UE101 and UE102, there may be more or fewer signaling interactions, which can refer to relevant standards and will not be elaborated here for the time being.

[0094] Briefly, through the above steps (1)-(7), UE101 and UE102 first establish corresponding bearers respectively, and then establish an IMS session based on the established bearers. It can be understood that the bearers are established between the UE and the Packet Data Network (PDN). The bearers in the embodiments of this application include default bearers and dedicated bearers. The default bearer includes a bearer with QCI = 5 for carrying control signaling during calls and conversations, etc. The dedicated bearer includes a bearer with QCI = 1 to meet the quality of service (QoS) requirements of the multimedia data transmitted between UE101 and UE102, and is used to carry voice packets and / or video streams on the media plane.

[0095] In some embodiments, during a VONR call, the NR cell where the UE camps may instruct the UE to handover (HO) from NR to LTE. For example, the radio signal strength received by the UE from the NR cell becomes weak, triggering the UE to redirect or HO to LTE. That is, the UE switches from the NR communication system to the LTE communication system, and the above process involves cross-systems and there is a risk of call drop.

[0096] As shown Figure 3 in the figure, the UE accesses the NR communication system through NR cell B (which can also be simply referred to as cell B), and performs VONR calls based on the NR communication system. During the VONR call, the UE transmits voice data to the NR core network through NR cell B according to the Real-Time Transport Protocol (RTP) / Real-Time Transport Control Protocol (RTCP). During the VONR call, the process of the UE being redirected or handed over from NR to LTE is as follows:

[0097] S1. The UE can measure the target cells, where the target cells include NR cell B and LTE cell A.

[0098] Among them, the above-mentioned target cells include the UE's current serving cell and the corresponding neighboring cells. The above-mentioned serving cell is the cell where the UE camps, such as Figure 3 NR cell B in the figure. The neighboring cell is a cell whose coverage area overlaps with that of the serving cell, such as Figure 3 LTE cell A (which can also be simply referred to as cell A) in the figure. Of course, it can also include Figure 3 cells not shown in the figure.

[0099] In some examples, the above-mentioned neighboring cells and the serving cell use the same network mode, which can also be called the serving cell and the neighboring cells are of the same system. The above-mentioned neighboring cells can also use a different network mode from the serving cell, which can also be called the serving cell and the neighboring cells are of different systems. In addition, Figure 3 in the figure, the network device corresponding to NR cell B is the first network device using the first network mode (NR), and the network device corresponding to the above-mentioned LTE cell A is the second network device using the second network mode (LTE).

[0100] In some embodiments, after the UE accesses NR cell B, that is, when NR cell B is the serving cell, the UE can receive RRC reconfiguration information from NR cell B. The RRC reconfiguration information includes the neighboring cell frequency points, and the above-mentioned neighboring cell frequency points are the frequency points corresponding to the neighboring cells of NR cell B. For example, if LTE cell A is a neighboring cell of NR cell B, the neighboring cell frequency points in the RRC reconfiguration information include the frequency points corresponding to LTE cell A.

[0101] In some embodiments, the UE can measure the target cells based on the frequency points of the serving cell and the neighboring cell frequency points under preset conditions. Exemplarily, the above-mentioned preset conditions can be that a measurement period is configured in the UE, and when the system time reaches the detection time point of each detection period.

[0102] In addition, the UE's measurement of the target cell can be to measure the signal condition of the target cell. For the specific process, reference can be made to related technologies. For example, when the UE is on the frequency band corresponding to LTE cell A and monitors the radio signal sent by LTE cell A, based on the radio signal from LTE cell A, the UE obtains the RSRP, RSSI, RSRQ value and / or SINR value corresponding to LTE cell A to achieve the measurement of NR cell B. For another example, the UE can also be on the frequency band corresponding to NR cell B and monitor the radio signal sent by NR cell B. Based on the radio signal from NR cell B, the UE obtains the RSRP, RSSI, RSRQ and / or SINR corresponding to NR cell B, etc., to achieve the measurement of NR cell B.

[0103] It can be understood that after the above measurements, the UE can obtain the measurement results corresponding to the target cell. Exemplarily, the measurement results include measurement values representing signal quality. For example, the RSRP, RSSI, RSRQ and / or SINR corresponding to NR cell B and LTE cell A. In possible embodiments, the above measurement results may also include the physical distance between the UE and NR cell B, LTE cell A, etc.

[0104] When the measurement results indicate that the target cell meets the reporting conditions corresponding to the pre-configured measurement event, the UE generates a corresponding measurement report (MR) and reports it to NR cell B.

[0105] Exemplarily, the above MR may record the signal strength and / or signal quality corresponding to the target cell. For example, the above signal strength may be the RSRP of the target cell, and the above signal quality may be the value evaluated by the UE based on the RSRP, RSSI, RSRQ and / or SINR of the target cell. Or, the above signal quality may also be indicated by the RSRP, RSSI, RSRQ and / or SINR. In some embodiments, the measurement events and corresponding reporting conditions pre-configured in the UE come from the serving cell (such as, NR cell B). Exemplarily, after the UE accesses NR cell B, the received RRC reconfiguration information may also include the measurement events and reporting conditions. Exemplarily, the measurement events may include: A3 event, A2 event, B1 event, B2 event, etc. The A3 event and A2 event are measurement events for neighboring cells of the same network as the serving cell, which can be called A events. The B1 event and B2 event are measurement events for neighboring cells of a different network from the serving cell, which can be called B events.

[0106] Among them, the A3 event (Event A3) means that the signal strength (or quality) of the same / different system neighboring cell is higher than that of the serving cell by a certain threshold, such as 3 dbm.

[0107] For example, NR cell B is the serving cell, and NR cell C is included in the neighboring cells of NR cell B. When the measurement result indicates that the Reference Signal Receiving Power (RSRP) value of NR cell C is 3 dbm higher than that of NR cell B, it is determined that NR cell C meets the reporting condition for Event A3, and an MR for Event A3 can be generated based on the measurement result. Event A2 indicates that the signal quality of the serving cell is lower than a certain threshold. For example, when NR cell B is the serving cell and the measurement result indicates that the RSRP of NR cell B is lower than the corresponding threshold, it is determined that NR cell B meets the reporting condition for Event A2, and an MR for Event A2 can be generated based on the measurement result.

[0108] Event B1 indicates that the signal quality of an inter-system neighboring cell is higher than a certain threshold. For example, when NR cell B is the serving cell and LTE cell A is an inter-system neighboring cell of NR cell B, when the measurement result indicates that the RSRP of LTE cell A is higher than the corresponding threshold, it is determined that LTE cell A meets the reporting condition for Event B1, and an MR for Event B1 can be generated based on the measurement result.

[0109] Event B2 indicates that the quality of the serving cell is lower than a certain threshold and / or the quality of the inter-system neighboring cell is higher than a certain threshold. For example, when NR cell B is the serving cell and LTE cell A is a neighboring cell, when the measurement result indicates that the RSRP of NR cell B is lower than the corresponding threshold and / or the RSRP of LTE cell A is higher than the corresponding threshold, it is determined that LTE cell A meets the reporting condition for Event B2, and an MR for Event B2 can be generated based on the measurement result.

[0110] In addition, the RSRP of NR cell B can indicate the signal strength of the first signal from the first network device detected by the UE. The RSRP of LTE cell A can indicate the signal strength of the second signal from the second network device detected by the UE.

[0111] In the following embodiments, taking LTE cell A meeting the reporting condition for Event B2 as an example for introduction. In the above Event B2, the corresponding threshold value for the serving cell is 1, and the corresponding threshold value for the inter-system neighboring cell is 2.

[0112] S2, the UE reports the MR for Event B2 to NR cell B.

[0113] Among them, the MR for the above Event B2 includes that the RSRP of NR cell B is lower than the threshold value 1, and the RSRP of LTE cell A is higher than the threshold value 2. The MR for the above Event B2 can indicate that the UE detects that the signal of NR cell B becomes weaker and the signal of LTE cell A becomes stronger. In some embodiments, the threshold value 1 corresponding to NR cell B can be less than the threshold value 2 of LTE cell A.

[0114] In S3, based on the measurement report (MR) of B2 event, NR cell B instructs the UE to handover to LTE cell A.

[0115] In S4, the UE accesses LTE cell A through random access (Rach) and establishes a Radio Resource Control (RRC) connection with LTE cell A.

[0116] In some embodiments, the process of the above-mentioned Rach to LTE cell A and establishing an RRC connection between the UE and LTE cell A can refer to the related technology and will not be elaborated here.

[0117] In S5, after the RRC connection is established, the UE sends a tracking area update (TAU) request to LTE cell A.

[0118] It can be understood that when the UE switches from NR cell B to LTE cell A, it involves crossing communication systems. According to relevant rules, the TAU process needs to be executed, that is, execute S5. Among them, the above-mentioned TAU request can also be denoted as TAU request, and the above-mentioned TAU request may include information indicating the currently active bearers. For example, during the VONR call based on NR cell B, the bearers indicated by EBI6, EBI5, and EBI7 are activated. Among them, the above-mentioned EBI6 corresponds to the bearer of QCI9, EBI5 corresponds to the bearer of QCI5, and EBI7 corresponds to the bearer of QCI1. Correspondingly, the above-mentioned TAU request carries eps_bearer_context_status, and this eps_bearer_context_status can be EBI5 = 1, EBI6 = 1, and EBI7 = 1. The above-mentioned EBI5 = 1 indicates that the bearer indicated by EBI5 is in the active state, and the same applies to others, which will not be elaborated here.

[0119] In S6, LTE cell A sends the TAU request from LTE cell A to the LTE core network.

[0120] In S7, the LTE core network obtains the context corresponding to the UE from the NR core network.

[0121] Among them, the above-mentioned LTE core network and NR core network can be different networks or different network elements in the same network. The embodiments of the present application do not make specific limitations on this.

[0122] In addition, the above context includes the bearers activated by the UE recorded by the NR core network. In an actual operation scenario, there may be differences between the bearers indicated as activated in the above context and those indicated as activated in the TAU request. For example, the above context indicates that only the bearer corresponding to EBI6 exists, and the bearers corresponding to EBI5 and EBI7 do not exist. That is, the context indicates that the bearer corresponding to EBI6 in the UE is activated, and the bearers corresponding to EBI5 and EBI7 are not activated. Correspondingly, the process can enter S8.

[0123] S8, the LTE core network sends a TAU response (TAU accept) to LTE cell A.

[0124] Among them, the TAU response carries eps_bearer_context_status. The LTE core network can configure eps_bearer_context_status as EBI5 = 0, EBI6 = 1, and EBI7 = 0 according to the context from the NR core network. Among them, EBI5 = 0 indicates that the bearer corresponding to EBI5 is not activated, EBI7 = 0 indicates that the bearer corresponding to EBI7 is not activated, and EBI6 = 1 indicates that the bearer corresponding to EBI6 is activated.

[0125] S9, LTE cell A sends a TAU response (EBI5 = 0, EBI6 = 1, and EBI7 = 0) to the UE, indicating that the bearers corresponding to EBI5 and EBI7 do not exist on the network side.

[0126] Among them, the bearer corresponding to EBI5 refers to the logical transmission channel corresponding to QCI5. The bearer corresponding to EBI7 refers to the logical transmission channel corresponding to QCI1.

[0127] S10, after the UE receives the TAU response, a call drop occurs.

[0128] In some embodiments, the TAU response can indicate that the IMS bearer does not exist on the network side. Exemplarily, the above IMS bearers include the bearer corresponding to EBI5 and the bearer corresponding to EBI7. If the bearer corresponding to EBI7 does not exist on the network side, the bearer for transmitting voice data (that is, EBI7) is lost. In this scenario, during a call, there will be a problem of no sound. If the bearer corresponding to EBI5 does not exist on the network side, the bearer for transmitting SIP signaling (that is, EBI5) is lost. In this scenario, during a call, there will be a problem of call drop.

[0129] In other embodiments, when the TAU response received by LTE cell A is inconsistent with the TAU request from the UE, LTE cell A may also not send a TAU response to the UE, or send response information indicating rejection of the TAU request, resulting in a call drop for the UE.

[0130] S11, The UE requests the LTE core network to initiate the PDN connection process for IMS through LTE cell A.

[0131] In some embodiments, the UE sends a PDN connectivity request for IMS to the LTE core network through LTE cell A.

[0132] S12, The LTE core network instructs to establish a data radio bearer (DRB) corresponding to QCI5 between the UE and LTE cell A.

[0133] In some embodiments, in response to the above PDN connectivity request, the LTE core network establishes a corresponding logical transport channel between LTE cell A and the LTE core network. Then, the LTE core network can send an Activate default EPS bearer context request to the UE through LTE cell A, instructing to establish a DRB corresponding to QCI5 between the UE and LTE cell A.

[0134] S13, LTE cell A sends RRC reconfiguration information to the UE, and the RRC reconfiguration information includes the EBI value corresponding to the DRB of QCI5.

[0135] For example, the EBI value assigned to the DRB of QCI is 5, and the RRC reconfiguration information includes the correspondence between QCI5 and EBI5.

[0136] Subsequently, when the UE responds to the user's operation and executes a call service again, it can create a bearer corresponding to QCI1.

[0137] It can be seen that during the process of the UE transferring from NR to LTE, there may be a problem of bearer loss, resulting in abnormal communication services (such as call services or Internet services) being executed.

[0138] In addition, in the commercial network of the current operator, during the execution of a call service, if the UE transfers from NR to LTE, it cannot switch back to NR before the call ends.

[0139] Taking the scenario where a user travels by high - speed train with a mobile phone (UE) as an example, on the route of the high - speed train, the signal coverage of NR is better than that of LTE in most sections, that is, the 5G signal strength is higher than the 4G signal strength. In a small part of the sections, the signal coverage of NR is worse than that of LTE, that is, the 5G signal strength is lower than the 4G signal strength.

[0140] During the high - speed rail operation, the mobile phone responds to user operations and is performing a VONR call. During the execution of the VONR call, if the mobile phone passes through a section with weak 5G signal strength along with the high - speed rail, the serving cell of the mobile phone changes from an NR cell to an LTE cell. In other words, the call service executed by the mobile phone switches from a VONR call to a VOLTE call. Subsequently, even if the mobile phone enters a section with a 5G signal stronger than the 4G signal along with the high - speed rail, it cannot switch back to NR before the call ends, resulting in an impact on call quality.

[0141] To improve the above - mentioned problems, an embodiment of the present application provides a method for calls, which is applied to a UE. During the operation of the UE, if an MR that meets the B2 event is generated and it is detected that the NR signal strength is good, the UE is inhibited from reporting the MR that meets the B2 event, reducing the probability of the UE transferring from NR to LTE and avoiding call drops and impacts on call quality.

[0142] In some embodiments, as Figure 4 shown, when the UE is within the coverage of NR cell B and LTE cell A, and the UE is connected to NR cell B, that is, when NR cell B is the serving cell of the UE, the above - mentioned method may include:

[0143] S101, NR cell B sends RRC re - configuration information to the UE, and the RRC re - configuration information includes information related to a target measurement event (such as, the B2 event).

[0144] Among them, the above - mentioned target measurement event may include one or more of A3 event, A2 event, B1 event, and B2 event. In subsequent embodiments, the B2 event is mainly used as an example for description. The information related to the target measurement event includes the type of the target measurement event and the threshold values involved in the measurement event. For example, the threshold value 1 and threshold value 2 corresponding to the B2 event.

[0145] In addition, the RRC re - configuration information may further include the neighboring cell frequency points, and the neighboring cell frequency points may indicate the frequency points of the neighboring cells corresponding to the current serving cell.

[0146] In some embodiments, in the RRC re - configuration information, there may be a correspondence between the neighboring cell frequency points and the target measurement event. In other words, the neighboring cells of NR cell B (such as, LTE cell A) may correspond to one or more types of target measurement events. For example, the B2 event corresponding to LTE cell A. In this way, after the UE measures LTE cell A and NR cell B, it needs to determine whether LTE cell A meets the B2 event. For specific details, refer to S102 and S103 in the subsequent embodiments.

[0147] S102, the UE measures the target cells, and the target cells include NR cell B and LTE cell A.

[0148] Among them, NR cell B is the serving cell, and LTE cell A is a neighboring cell of NR cell B. The neighboring cell frequency points in the RRC reconfiguration information from NR cell B include the frequency point of LTE cell A.

[0149] In some embodiments, the implementation details of the above S102 can refer to S1 in the foregoing embodiments and will not be elaborated here. Through the above measurements, corresponding measurement results can be obtained. For example, the measurement results can include RSRP, RSSI, RSRQ, and / or SINR corresponding to the target cell.

[0150] S103, the UE measures that LTE cell A meets the reporting condition of B2 event.

[0151] In the measurement results, the RSRP of NR cell B is lower than the corresponding threshold 1 and / or the RSRP of LTE cell A is higher than the corresponding threshold 2, indicating that the signal strength of the NR cell B where the UE camps is weakened, and / or the signal strength of LTE cell A is strengthened. The UE can determine that LTE cell A meets the reporting condition of B2 event. When it is determined that LTE cell A meets the reporting condition of B2 event, the process enters S104.

[0152] When it is determined that LTE cell A does not meet the reporting condition of B2 event, the process ends and the UE continues to measure the target cell.

[0153] S104, the UE determines whether the signals of NR cell B and / or LTE cell A meet the preset conditions.

[0154] Different from the related art, after the UE determines that LTE cell A meets the B2 event, the UE needs to continue to determine whether the signals from NR cell B and / or LTE cell A meet the preset conditions.

[0155] The above preset conditions are used to evaluate whether the current UE needs to switch the communication system. Among them, the above switching of the communication system may refer to switching from the NR cell to the LTE cell. When the preset conditions are met, the process enters S105. When the preset conditions are not met, the process enters S106.

[0156] In some embodiments, the above preset conditions can be configured from perspectives such as whether the currently camped NR cell can support the normal operation of the UE and whether the LTE neighboring cell is significantly better than the currently camped NR cell. Exemplarily, the above preset conditions may include one or more of the following:

[0157] 1) The signal strength and / or signal quality of NR cell B is greater than threshold 1.

[0158] 2) The target signal strength difference is less than or equal to the target threshold.

[0159] When one or more of the above preset conditions are included, the order of judgment of each preset condition is not specifically limited. Taking the above two preset conditions as an example, as Figure 5 shown, the above S104 may include the following steps S104-1 to S104-6:

[0160] S104-1, the UE determines whether the signal strength (or signal quality) of NR cell B is greater than threshold 1.

[0161] In some embodiments, the signal strength of NR cell B may refer to the RSRP of NR cell B measured by the UE. The above S104-1 may be that the UE determines whether the RSRP of NR cell B is greater than threshold 1 (the first threshold). Among them, the above threshold 1 may be an empirical value. When the signal strength of the serving cell of the UE is less than or equal to threshold 1, the UE cannot pass through the serving cell to perform various communication services normally / high-quality (for example, call service, Internet access service, etc.). When the signal strength of the serving cell of the UE is greater than threshold 1, the UE can still pass through the serving cell to perform various communication services normally.

[0162] In short, the above threshold 1 can be used to evaluate whether the serving cell can be used normally. Usually, the above threshold 1 is less than the threshold value 1 configured for the serving cell. Of course, in some scenarios, there is also a possibility that threshold 1 is greater than or equal to the threshold value 1 configured for the serving cell, and the embodiments of the present application do not make specific limitations on this.

[0163] In other embodiments, the signal quality of NR cell B may refer to an evaluation value obtained based on the RSRP, RSSI, RSRQ, and SINR of NR cell B measured by the UE. The above S104-1 may be that the UE determines whether the above evaluation value is greater than threshold 1 (the first threshold). It can be understood that the threshold 1 for signal strength and the threshold 1 for signal quality may be different values, and of course, both may be empirical values.

[0164] In subsequent embodiments, the description mainly focuses on comparing the signal strength of NR cell B and threshold 1. Exemplarily, when the signal strength of NR cell B is greater than threshold 1, the process proceeds to S104-2. When the signal strength of NR cell B is less than or equal to threshold 1, the process proceeds to S106.

[0165] S104-2, the UE obtains the target signal strength difference (d) between LTE cell A and NR cell B.

[0166] Exemplarily, the above target signal strength difference may be the difference between the RSRP of LTE cell A and the RSRP of NR cell B, which can be denoted as d.

[0167] In some embodiments, when the signal strength of NR cell B is greater than threshold 1, the UE can subtract the RSRP of NR cell B from the RSRP of LTE cell A to obtain the corresponding target signal strength difference (d).

[0168] S104-3, the UE determines whether a call service is currently being executed.

[0169] If the UE is executing a call service, the process proceeds to S104-4. If the UE is not executing a call service, the process proceeds to S104-5.

[0170] S104-4, the UE determines that the target threshold (Th) is threshold 2.

[0171] S104-5, the UE determines that the target threshold is threshold 3, where threshold 2 is greater than threshold 3.

[0172] Among them, the target threshold can be used to measure whether it is necessary for the UE to switch from NR to LTE currently. It can be understood that the higher the target threshold, the higher the requirement for switching from NR to LTE. The lower the target threshold, the lower the requirement for switching from NR to LTE. In the embodiments of the present application, the target threshold can be a dynamic value, and the assignment of the target threshold can be different in different application scenarios.

[0173] Exemplarily, in the call scenario and the non-call scenario, the assignment of the target threshold is different, that is, threshold 2 (the second threshold) and threshold 3 (the third threshold) can also be different empirical values. In this way, during the execution of the call service, the UE raises the requirement for switching from NR to LTE to avoid call drops. Of course, during the period when the call service is not being executed, the probability of the UE switching from NR to LTE can also be reduced by setting the target threshold to threshold 3 to avoid unnecessary handovers.

[0174] After the UE executes S104-4 or S104-5, the process proceeds to S104-6.

[0175] S104-6, the UE determines whether the target signal strength difference (d) is greater than the target threshold (Th).

[0176] In some embodiments, the UE determines whether the condition for switching from NR to LTE is met by comparing the target signal strength difference with the target threshold.

[0177] When the signal quality of LTE cell A is significantly better than that of NR cell B, that is, when the target signal strength difference is greater than the target threshold, it is determined that the UE can switch from NR to LTE, and the process proceeds to S106. When the signal quality of LTE cell A is not significantly better than that of NR cell B, that is, when the target signal strength difference is less than or equal to the target threshold, it is determined that the UE does not need to switch from NR to LTE, and the process proceeds to S105.

[0178] Understandably, the target threshold is different in different application scenarios. In this way, in the call scenario compared with the non-call scenario, the difference in signal quality between LTE cell A and NR cell B is greater, so as to determine that the UE needs to handover from NR to LTE.

[0179] In this way, the UE can ensure that during the execution of the VONR call, the probability of switching from VONR to VOLTE can be reduced. In other words, it is possible to avoid the situation where the call service being carried out by the UE drops from VONR to VOLTE, and due to the current network not supporting the handover from VOLTE to VONR, the subsequent call service can only be carried out on LTE and cannot enjoy the good voice quality of VONR. In addition, during the process of VONR dropping to VOLTE, the UE also has the risk of dropping the call. Therefore, this embodiment can improve the quality of the call service and reduce the call drop rate.

[0180] In addition, the above S104-1 to S104-6 are an example of the UE evaluating whether the signals of NR cell B and / or LTE cell A meet the preset conditions. As shown in S104-1 to S104-6, when the signal strength (or signal quality) of NR cell B is greater than threshold 1 and the target signal strength difference (d) is less than or equal to the target threshold, it is determined that the preset conditions are met, and the process proceeds to S105. When the signal strength (or signal quality) of NR cell B is not greater than threshold 1, or the target signal strength difference (d) is greater than the target threshold, it is determined that the preset conditions are not met, and the process proceeds to S106.

[0181] S105, the UE does not report the MR of the B2 event.

[0182] In some embodiments, when the signals of NR cell B and / or LTE cell A meet the preset conditions, for example, Figure 5 As shown, when the signal strength (signal quality) of NR cell B is greater than threshold 1 and the target signal strength difference (d) is less than or equal to the target threshold (Th), it indicates that the current signal of NR cell B can support the UE to normally execute the communication service. At the same time, the signal of LTE cell A is not significantly better than that of NR cell B. In other words, there is no need to switch to LTE cell A currently. Accordingly, the UE can not report the MR of the B2 event, and the process ends.

[0183] Exemplarily, the UE can achieve not reporting the MR of the B2 event by suppressing the generation of the corresponding MR of the B2 event. Another example is that the UE can also achieve not reporting the MR of the B2 event by suppressing the reporting of the MR of the B2 event to NR cell B.

[0184] S106. The UE reports the measurement report (MR) of B2 event to NR cell B, and this MR indicates that LTE cell A meets the reporting conditions of B2 event.

[0185] In some embodiments, when the signals of NR cell B and / or LTE cell A do not meet the preset conditions, the UE may generate the MR of B2 event and report this MR to NR cell B. The RSRP of NR cell B is lower than threshold 1 and / or the RSRP of LTE cell A is higher than threshold 2 is recorded in the MR of B2 event, and this MR can trigger NR cell B to instruct the UE to transfer to LTE cell A. For details, see S107.

[0186] For example, Figure 5 As shown, when the signal strength (signal quality) of NR cell B is less than or equal to threshold 1, it indicates that the current signal of NR cell B cannot support the UE to normally execute communication services. The UE may generate the MR of B2 event and report this MR to NR cell B.

[0187] For another example, Figure 5 As shown, when the signal strength (signal quality) of NR cell B is greater than threshold 1 and the target signal strength difference between LTE cell A and NR cell B is greater than the target threshold, it indicates that the signal of LTE cell A is significantly better than that of NR cell B. Transferring to LTE cell A can ensure the communication quality. The UE may generate the MR of B2 event and report this MR to NR cell B. It can be understood that the above S105 and S106 are two mutually exclusive steps. After the UE determines whether the signals of NR cell B and / or LTE cell A meet the preset conditions, it either executes S105 or executes S106. After executing S105, the process ends. After executing S106, the process enters S107.

[0188] S107. NR cell B instructs the UE to switch to LTE cell A according to the MR of B2 event.

[0189] For example, NR cell B may send handover indication information to the UE.

[0190] S108. The UE accesses LTE cell A through random access (Rach) and establishes a Radio Resource Control (RRC) connection with LTE cell A.

[0191] S109. After the RRC connection is established, the UE sends a tracking area update (TAU) request to LTE cell A, requesting to execute the TAU process.

[0192] For the implementation details of S107 to S109 above, reference can be made to S3 to S6 in the foregoing embodiments, which will not be elaborated here for the time being.

[0193] Taking mobile phone 1 and mobile phone 2 applying the above method as an example, mobile phone 1 is in a call state and mobile phone 2 is in a non-call state. Mobile phone 1 and mobile phone 2 are in the same location, both can detect NR cell B and LTE cell A, and both camp on NR cell B. In addition, in the B2 event configured in NR cell B, the serving cell corresponds to threshold 1 and the inter-system neighbor cell corresponds to threshold 2.

[0194] In one exemplary scenario, the RSRP of NR cell B scanned by both mobile phone 1 and mobile phone 2 is less than threshold 1 and greater than threshold 1. When the difference between the RSRP of LTE cell A and the RSRP of NR cell B is less than or equal to threshold 3, mobile phone 1 and mobile phone 2 continue to camp on NR cell B.

[0195] In another exemplary scenario, the RSRP of NR cell B scanned by both mobile phone 1 and mobile phone 2 is less than threshold 1 and greater than threshold 1. When the difference between the RSRP of LTE cell A and the RSRP of NR cell B is greater than threshold 3 and less than or equal to threshold 2, mobile phone 2 transfers from NR cell B to LTE cell A, and mobile phone 1 continues to camp on NR cell B.

[0196] In yet another exemplary scenario, the RSRP of NR cell B scanned by both mobile phone 1 and mobile phone 2 is less than threshold 1 and greater than threshold 1. When the difference between the RSRP of LTE cell A and the RSRP of NR cell B is greater than threshold 2, both mobile phone 1 and mobile phone 2 transfer from NR cell B to LTE cell A.

[0197] In some other embodiments, multiple groups of threshold 1, threshold 2, and threshold 3 can be configured in the UE. During the period when the UE camps on the NR cell, different threshold 1, threshold 2, and threshold 3 can be dynamically adopted to evaluate whether to transfer from NR to LTE.

[0198] In some embodiments, threshold 1, threshold 2, and threshold 3 corresponding to different scenarios can be pre-configured in the UE. Among them, the above scenarios can include geographical scenarios (such as road segments) and cell scenarios (such as serving cells and neighbor cells with different configurations), etc.

[0199] Exemplarily, different threshold 1, threshold 2, and threshold 3 corresponding to different high - speed railway sections can be configured in the UE. For example, on high - speed railway section 1 from place A to place B, the NR coverage effect is better than the LTE coverage effect, and on high - speed railway section 2 from place B to place C, the LTE coverage effect is better than the NR coverage effect. The "threshold 1, threshold 2, and threshold 3" corresponding to high - speed railway section 1 pre - configured in the UE are different from the "threshold 1, threshold 2, and threshold 3" corresponding to high - speed railway section 2. For example, the threshold 1 corresponding to high - speed railway section 1 is lower than the threshold 1 corresponding to high - speed railway section 2, the threshold 2 corresponding to high - speed railway section 1 is higher than the threshold 2 corresponding to high - speed railway section 2, and / or the threshold 3 corresponding to high - speed railway section 1 is higher than the threshold 3 corresponding to high - speed railway section 2.

[0200] Exemplarily, the threshold 1, threshold 2, and threshold 3 corresponding to NR cells of different frequency bands (bands) and LTE cells of different bands can be configured in the UE.

[0201] Exemplarily, the threshold 1, threshold 2, and threshold 3 corresponding to different duplex modes can be configured in the UE.

[0202] For example, the threshold 1, threshold 2, and threshold 3 corresponding to time - division duplexing (TDD) are configured in the UE; the threshold 1, threshold 2, and threshold 3 corresponding to frequency - division duplexing (FDD) are also configured in the UE. The multiple sets of threshold 1, threshold 2, and threshold 3 exemplified above can be different.

[0203] In other possible examples, the threshold 1, threshold 2, and threshold 3 corresponding to different high - speed railway sections, the band of NR cells, the band of LTE cells, and / or the duplex mode of the UE are also configured in the UE.

[0204] In this way, the UE can determine the threshold 1, threshold 2, and threshold 3 that need to be configured according to the scene identified in real - time. Then, based on the determined threshold 1, threshold 2, and threshold 3, it is evaluated whether it is necessary to transfer from the NR cell to the LTE cell.

[0205] As Figure 6 shown, the UE includes an application processor (AP) and a modem processor (Modem). When the UE is within the coverage of NR cell B and LTE cell A, and the UE accesses NR cell B, that is, when NR cell B is the serving cell of the UE, the above - mentioned method may further include:

[0206] S201, the AP determines the threshold 1, threshold 2, and threshold 3 that match the current scene.

[0207] In some embodiments, the AP may obtain the current location information of the UE, the travel information of the user, the operating state of the UE, the band corresponding to NR cell B, the band corresponding to LTE cell A, and / or the duplex mode corresponding to the UE.

[0208] Then, based on the location information, the travel information of the user, the operating state of the UE, the band corresponding to NR cell B, the band corresponding to LTE cell A, and / or the duplex mode corresponding to the UE, matching threshold 1, threshold 2, and threshold 3 are searched for.

[0209] Exemplarily, when the obtained current location is within the geofence of a high-speed railway station or a high-speed railway section, and the travel information contains content related to high-speed rail (for example, a valid high-speed rail ticket), the UE searches for threshold 1, threshold 2, and threshold 3 corresponding to the high-speed railway section, and the process proceeds to S202.

[0210] Exemplarily again, when the obtained current location is within the geofence of a high-speed railway station or a high-speed railway section, and the operating state indicates that the UE is in a high-speed moving state, the UE searches for threshold 1, threshold 2, and threshold 3 corresponding to the high-speed railway section, and the process proceeds to S202.

[0211] Exemplarily again, based on the band corresponding to NR cell B and the band corresponding to LTE cell A, matching threshold 1, threshold 2, and threshold 3 are found, and the process proceeds to S202.

[0212] Exemplarily again, based on the duplex mode corresponding to the UE, matching threshold 1, threshold 2, and threshold 3 are found, and the process proceeds to S202.

[0213] Exemplarily further, based on the high-speed railway section corresponding to the current location, the band of the NR cell, the band of the LTE cell, and / or the duplex mode corresponding to the UE, matching threshold 1, threshold 2, and threshold 3 are found, and the process proceeds to S202.

[0214] S202, the AP configures threshold 1, threshold 2, and threshold 3 into the Modem.

[0215] In some embodiments, the AP may periodically execute S201 above. Each time a set of threshold 1, threshold 2, and threshold 3 is determined, the process proceeds to S202. If no matching threshold 1, threshold 2, and threshold 3 are determined, S201 is continued to be executed.

[0216] S203, NR cell B sends RRC reconfiguration information to the Modem, and the RRC reconfiguration information includes information related to a target measurement event (such as, event B2).

[0217] In some embodiments, there is no necessary sequence between the above S203 and S201. The AP of the UE dynamically determines threshold 1, threshold 2, and threshold 3 adapted to the current scenario through S201 and S202, and configures them into the Modem. The Modem can perform subsequent steps based on the most recently received threshold 1, threshold 2, and threshold 3.

[0218] In another embodiment, it is not necessary for the AP to execute steps S201 - 202. Threshold 1, threshold 2, and threshold 3 can be pre - configured in the Modem, so the entire method flow of this embodiment can be entirely executed by the Modem.

[0219] S204, the Modem measures the target cell, and the target cell includes NR cell B and LTE cell A.

[0220] S205, the Modem measures that LTE cell A meets the reporting conditions corresponding to the B2 event.

[0221] For the implementation details of the above S203 - S205, reference can be made to S101 - S103 in the foregoing embodiments.

[0222] S206, the Modem determines whether the signal strength of NR cell B is greater than threshold 1.

[0223] When the signal strength of NR cell B is greater than threshold 1, the process enters S207. When the signal strength of NR cell B is less than or equal to threshold 1, the process enters S213.

[0224] S207, the Modem obtains the target signal strength difference (d) between LTE cell A and NR cell B.

[0225] Exemplarily, when the Modem determines that the signal strength of NR cell B is greater than threshold 1, it subtracts the RSRP of NR cell B from the RSRP of LTE cell A to obtain the corresponding target signal strength difference (d).

[0226] S208, the Modem determines whether a call service is currently being executed.

[0227] If a call service is being executed, the process enters S209. If no call service is being executed, the process enters S210.

[0228] S209, the Modem determines that the target threshold (Th) is threshold 2.

[0229] S210, the Modem determines that the target threshold is threshold 3.

[0230] After the Modem executes S209 or S210, the process enters S211. That is, if a call service is being executed, the Modem executes S209. After executing S209, the process skips S210 and enters S211. If the call service is not executed, the Modem skips S209 and executes S210. After executing S210, the process enters S211.

[0231] In S211, the Modem determines whether the target signal strength difference (d) is greater than the target threshold (Th).

[0232] When the target signal strength difference (d) is greater than the target threshold (Th), the process enters S213. When the target signal strength difference (d) is less than or equal to the target threshold (Th), the process enters S212.

[0233] In some embodiments, the above S206 - S211 is an example of the UE evaluating whether the signals of NR cell B and / or LTE cell A meet the preset conditions, and is not a specific limitation. Additionally, for implementation details, reference can be made to S104 of the foregoing embodiments.

[0234] In S212, the Modem does not report the MR of the B2 event.

[0235] In some embodiments, when the signal strength of NR cell B is greater than threshold 1 and the target signal strength difference (d) is less than or equal to the target threshold (Th), the MR of the B2 event is not reported, avoiding triggering NR cell B to instruct the UE to transfer to LTE cell A, and the process ends.

[0236] In S213, the Modem reports the MR of the B2 event to NR cell B, and this MR indicates that LTE cell A meets the reporting conditions of the B2 event.

[0237] Among them, the reported MR records that the RSRP of NR cell B is lower than threshold 1 (the first threshold) and / or the RSRP of LTE cell A is higher than threshold 2 (the second threshold), which can trigger NR cell B to instruct the UE to transfer to LTE cell A. The above S212 and S213 are two mutually exclusive steps. After the Modem obtains the determination of whether it meets the preset conditions, it either executes S212 or executes S213.

[0238] In some embodiments, when the signal strength of NR cell B is less than or equal to threshold 1, the Modem reports the MR of the B2 event to NR cell B.

[0239] In other embodiments, when the signal strength of NR cell B is greater than threshold 1 and the target signal strength difference (d) is greater than the target threshold (Th), the Modem can also report the MR of the B2 event to NR cell B.

[0240] S214. The NR cell B instructs the UE to hand over from the NR cell B to the LTE cell A according to the MR of the B2 event.

[0241] S215. The Modem accesses the LTE cell A through random access (Rach) and establishes a Radio Resource Control (RRC) connection with the LTE cell A.

[0242] S216. After the RRC connection is established, the Modem sends a tracking area update (TAU) request to the LTE cell A, requesting to execute the TAU process.

[0243] In some embodiments, the implementation details of S212 to S216 above may refer to S105 to S109 in the above embodiments.

[0244] In other possible embodiments, after the UE determines that the LTE cell meets the reporting condition corresponding to the target measurement event, it may continue to determine whether the RSRP of the current serving cell is greater than threshold 1. If the RSRP of the serving cell is greater than threshold 1, the MR of the target measurement event is suppressed. If the RSRP of the serving cell is less than or equal to threshold 1, the above MR of the target measurement event is reported to the serving cell.

[0245] In other possible embodiments, after the UE determines that the LTE cell meets the reporting condition corresponding to the target measurement event, it may also obtain the corresponding target signal strength difference (d). When the target signal strength difference (d) is less than or equal to the current target threshold, the MR of the target measurement event is suppressed. When the target signal strength difference (d) is greater than the current target threshold, the MR of the target measurement event is reported to the serving cell.

[0246] Taking the example of a user taking a high - speed train with a mobile phone, the travel information of the user indicates that the high - speed train the user is taking will pass through high - speed rail section 1 and high - speed rail section 2 in sequence. The NR coverage effect is better than the LTE coverage effect on high - speed rail section 1, and the LTE coverage effect is better than the NR coverage effect on high - speed rail section 2. In this way, during the period of passing through high - speed rail section 2, compared with the period of passing through high - speed rail section 1, the ongoing VONR call on the mobile phone is more likely to be switched to a VOLTE call.

[0247] In some embodiments, when the UE determines that the current meets the first condition, it may also report the measurement report corresponding to event B to cell A. The above first condition may be that cell A meets the reporting condition of event B and the signal value of cell B is less than or equal to the first threshold.

[0248] When the UE determines that the second condition and the third condition are currently satisfied, it can also report a measurement report corresponding to event B to cell A. The second condition may be that cell A satisfies the reporting condition of the B event, and the signal value of cell B is greater than the threshold 1. The third condition may be that the UE is currently in a call service, and the difference between the signal value of cell A and the signal value of cell B is greater than the second threshold, or the UE is not currently in a call service, and the difference between the signal value of cell A and the signal value of cell B is greater than the third threshold.

[0249] When the UE determines that the second condition is currently satisfied but the third condition is not satisfied, the UE suppresses reporting the measurement report of event B to the network side.

[0250] In some embodiments, Figure 7 A hardware structure of the UE is shown. As Figure 7 shown, the UE may include a processor, an external memory interface, an internal memory, a Universal Serial Bus (USB) interface, a charging management module, a power management module, a battery, antenna 1, antenna 2, a mobile communication module, a wireless communication module, a sensor module, keys, a motor, an indicator, a camera, a display screen, and a SIM card slot, etc. Among them, the audio module may include a speaker, a receiver, a microphone, a headphone interface, etc., and the sensor module may include a pressure sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, a bone conduction sensor, etc.

[0251] It can be understood that the structure illustrated in the embodiments of the present application does not constitute a specific limitation on the UE. In other embodiments, the UE may include more or fewer components than those shown in the figure, or combine certain components, or split certain components, or have different component arrangements. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0252] Among them, the processor may include one or more processing units. For example, the processor may include an Application Processor (AP), a Modem (which may also be referred to as a baseband processor), a Graphics Processing Unit (GPU), an Image Signal Processor (ISP), a controller, a video codec, a Digital Signal Processor (DSP), and / or a Neural-network Processing Unit (NPU), etc. Among them, different processing units may be independent devices or integrated in one or more processors. The processor is the nerve center and command center of the UE. The controller can generate operation control signals according to the instruction operation code and timing signal to complete the control of fetching and executing instructions.

[0253] The wireless communication function of the UE can be implemented through Antenna 1, Antenna 2, a mobile communication module, a wireless communication module, and a Modem, etc. In some embodiments, Antenna 1 of the UE is coupled to the mobile communication module, and Antenna 2 is coupled to the wireless communication module, enabling the UE to communicate with network-side devices and other terminals through wireless communication technologies.

[0254] In addition, an operating system runs on the above components. The above operating system may be an Android open-source operating system, a Windows operating system, or other possible operating systems, etc.

[0255] The operating system of the UE may adopt a layered architecture, an event-driven architecture, a microkernel architecture, a microservices architecture, or a cloud architecture. In the embodiments of this application, taking the Android system with a layered architecture as an example, the software and hardware structure of the UE is exemplarily described. It should be noted that although the embodiments of this application are described by taking the Android system as an example, its basic principles are equally applicable to UEs based on other operating systems.

[0256] Figure 8 It is a software structure block diagram of the UE. The software structure adopts a layered architecture. The layered architecture divides the software into several layers, and each layer has a clear role and division of labor. The layers communicate with each other through software interfaces. Taking the Android system running on the AP as an example, in some embodiments, the Android system is divided into five layers, from top to bottom are the application layer, the application framework layer (Framework), the Android runtime and system libraries, the Hardware Abstraction Layer (HAL), and the system kernel layer (Kernel).

[0257] Among them, the application layer may include a series of application packages. The application packages may include apps such as camera, gallery, calendar, call, map, WLAN, Bluetooth, music, video, short message, etc. The application layer may also include systemUI (system user interface), and systemUI is used to display the interface of the UE, such as displaying the signal icon corresponding to the SIM card, displaying the call interface, etc. The application framework layer provides application programming interfaces (Application Programming Interface, API) and programming frameworks for the applications in the application layer. The application framework layer includes some predefined functions. For example, the application framework layer may include window manager, content provider, view system, telephone manager, resource manager, notification manager, etc. The telephone manager is used to provide the call function of the UE. For example, the management of call status (including connection, disconnection, etc.), and the telephone manager is represented by telephony in Figure 8 this. The application framework layer may also include RIL (Radio Interface Layer, wireless communication interface layer), and the modem can interact with telephony through RIL.

[0258] Among them, the above system libraries may include surface manager, 3D image processing library, 2D graphics engine, media library, etc. The above HAL layer may include display HAL, camera HAL, audio HAL, and sensor HAL, etc. The above kernel layer includes display driver, camera driver, audio driver, and sensor driver, etc.

[0259] The modem may include NAS (Non-Access Stratum, non-access layer), RRC (radio resource control, radio resource control) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, Medium Access Control (MAC) layer, and Physical (PHY) layer. The foregoing layers may be software modules. The modem can interact with the base station through the antenna.

[0260] In addition, some embodiments of the present application provide an electronic device, which includes: one or more processors and a memory; the memory is used to store computer program code, and the computer program code includes computer instructions. When the one or more processors execute the computer instructions, the electronic device executes the above method.

[0261] Some embodiments of the present application provide a chip system, which is applied to a terminal. The chip system includes at least one processor and an interface. The interface is used to receive instructions and transmit them to at least one processor. The at least one processor runs the instructions to cause the terminal to execute the above method. Among them, the chip system may be a Modem, and the above method may be implemented by a Modem. In other embodiments, the above chip system may also be a system on chip (Soc) including a Modem and an AP, and the above method may be implemented by the AP and the Modem.

[0262] In some embodiments, through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and conciseness of description, only the division of the above functional modules is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated here.

[0263] In each embodiment of the embodiments of the present application, the functional units may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit. The above integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0264] If the above integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: various media such as flash memory, mobile hard disk, read-only memory, random access memory, magnetic disk, or optical disc that can store program codes.

[0265] The above is only the specific implementation manner of the embodiments of the present application, but the protection scope of the embodiments of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the embodiments of the present application should be covered by the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be subject to the protection scope of the claims.

Claims

1. A method for making a call, characterized in that, The method includes: The UE receives RRC reconfiguration information from a first network device, where the RRC reconfiguration information includes reporting conditions corresponding to a target measurement event, and the reporting conditions are conditions that the signal strength of a first signal and / or a second signal need to meet; the first signal is a radio signal sent by the first network device of a first network mode, and the second signal is a radio signal sent by a second network device of a second network mode, where the first network mode is higher than the second network mode; When the first signal and / or the second signal detected by the UE meet the reporting conditions and meet a preset condition, the UE suppresses reporting a measurement report of the target measurement event to the first network device; Wherein, the preset condition includes one or more of the following: The signal strength of the first signal is greater than a first threshold; The target signal strength difference is less than or equal to a target threshold; the target signal strength difference is the difference between the signal strength of the second signal and the signal strength of the first signal.

2. The method according to claim 1, wherein When the UE is performing a call service, the target threshold is a second threshold; When the UE is not performing a call service, the target threshold is a third threshold; the second threshold is greater than the third threshold.

3. The method according to claim 1 or 2, characterized in that, The method further includes: When the first signal and / or the second signal detected by the UE meet the reporting conditions and do not meet the preset condition, the UE reports a measurement report of the target measurement event to the first network device; In response to the handover indication information of the first network device, the UE switches from the first network device of the first network mode to the second network device of the second network mode.

4. The method according to any one of claims 1 to 3, characterized in that The first network mode is NR, and the second network mode is LTE.

5. The method according to any one of claims 1-4, characterized in that, The method further includes one or more of the following: The value of the first threshold is related to one or more of the following: the current location information of the UE, the trip information configured in the UE, the motion state of the UE, the frequency band of the first network device, the frequency band of the second network device, or the duplex mode enabled by the UE; The value of the second threshold is related to one or more of the following: the current location information of the UE, the trip information configured in the UE, the motion state of the UE, the frequency band of the first network device, the frequency band of the second network device, or the duplex mode enabled by the UE; The value of the third threshold is related to one or more of the following: the current location information of the UE, the trip information configured in the UE, the motion state of the UE, the frequency band of the first network device, the frequency band of the second network device, or the duplex mode enabled by the UE.

6. The method according to any one of claims 1-5, characterized in that, The target measurement event is event B.

7. The method according to any one of claims 1-6, characterized in that, The target measurement event is event B2, and the reporting conditions include: The signal strength of the detected first signal is less than a first threshold value, and the signal strength of the detected second signal is greater than a second threshold value; the first threshold value is greater than the first threshold.

8. A method for a call, characterized in that, The method includes: The UE camps on cell B of the first network mode; The UE receives an RRC reconfiguration message sent by the network side, and the reporting condition of event B is configured in the RRC reconfiguration message; When the first condition is satisfied, the UE reports a measurement report of event B to the network side, where the first condition includes: the cell A of the second network mode satisfies the reporting condition of event B, and the signal value of cell B is less than or equal to the first threshold; where the first network mode is higher than the second network mode; When the second condition and the third condition are satisfied, the UE reports a measurement report of event B to the network side; When the second condition is satisfied but the third condition is not satisfied, the UE suppresses reporting a measurement report of event B to the network side; where the second condition includes: cell A satisfies the reporting condition of event B, and the signal value of cell B is greater than the threshold 1; The third condition includes: the UE is currently in a call service, and the difference between the signal value of cell A and the signal value of cell B is greater than the second threshold, or, the UE is not currently in a call service, and the difference between the signal value of cell A and the signal value of cell B is greater than the third threshold, where the second threshold is greater than the third threshold.

9. An electronic device, characterized in that, Comprising: a processor and a memory; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the electronic device executes the method described in any one of claims 1-8.

10. A chip system, characterized in that, Comprising at least one processor and a communication interface, the communication interface and the at least one processor are interconnected by a line, and the at least one processor is used to run a computer program or instruction to execute the method described in any one of claims 1-8.

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