CN117880930A

CN117880930A - Communication method and device

Info

Publication number: CN117880930A
Application number: CN202310072922.2A
Authority: CN
Inventors: 罗志伟
Original assignee: Huawei Device Co Ltd
Current assignee: Huawei Device Co Ltd
Priority date: 2022-10-12
Filing date: 2023-01-31
Publication date: 2024-04-12

Abstract

A communication method and a device relate to the technical field of wireless communication and are used for improving the accuracy of displaying network system identifiers by terminal equipment. The method comprises the following steps: the method comprises the steps that terminal equipment receives anchor point information from a network side, wherein the anchor point information is used for indicating the capability of a first base station to provide double-connection service, the double-connection comprises main connection between the terminal equipment and the first base station and secondary connection between the terminal equipment and a second base station, the first base station is a base station of a first network system, and the second base station is a base station of a second network system; determining whether an intersection exists between a frequency band of a second network system supported by the first base station and a frequency band of the second network system supported by the terminal equipment; and determining a network system identifier displayed on a screen of the terminal equipment according to the anchor point information and whether an intersection exists, wherein the network system identifier comprises one of the identifier of the first network system and the identifier of the second network system.

Description

Communication method and device

Cross Reference to Related Applications

The present application claims priority from the chinese patent office, application number 202211246934.4, application name "a communication method and apparatus" filed on day 12 10 of 2022, the entire contents of which are incorporated herein by reference.

Technical Field

The present disclosure relates to the field of wireless communications technologies, and in particular, to a communication method and apparatus.

Background

The evolution of the fifth generation mobile communication technology (5th generation mobile communication technology,5G) New Radio (NR) architecture is divided into two networking modes: non-independent Networking (NSA) and independent networking (SA). NSA networking may be applied in scenarios where 5G network deployment is based on long term evolution (long term evolution, LTE) network infrastructure.

In an NSA network, an LTE base station (eNB) and a 5G base station (gNB) share a core network, the eNB is a master station, the gNB is a slave station, and control plane signaling is sent to the core network through the eNB. The anchor cell is a dual connectivity cell supporting both NR access technology and LTE access technology.

Under NSA networking, how to display the identifier of the network system (or called the icon of the network system, such as the 5G system icon and the LTE system icon) on the terminal device, so as to accurately indicate the network system currently accessed by the terminal device is a technical problem to be solved at present.

Disclosure of Invention

The embodiment of the application provides a communication method and a communication device, which are used for improving the accuracy of displaying network system identifiers by terminal equipment.

In a first aspect, a communication method is provided and applied to a terminal device, and the method includes: receiving anchor point information from a network side, wherein the anchor point information is used for indicating the capability of a first base station for providing double-connection service; determining whether an intersection exists between a frequency band of the second network system supported by the first base station and a frequency band of the second network system supported by the terminal device; and determining a network system identifier displayed on a screen of the terminal equipment according to the anchor point information and whether an intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal equipment, wherein the network system identifier comprises one of the identifier of the first network system and the identifier of the second network system. The dual connection comprises a master connection between the terminal equipment and the first base station and a slave connection between the terminal equipment and the second base station, wherein the first base station is a base station of a first network system, and the second base station is a base station of a second network system.

Optionally, after determining the network system identifier displayed by the terminal device, displaying the network system icon on the terminal device.

Optionally, the first network system is an LTE system, the second network system is a 5G system, and the dual connection is an LTE-NR dual connection (e_utra-NR Dual Connectivity, EN-DC).

In the above implementation manner, since "whether the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device" is used as one of the bases for determining the network system identifier, the problem that the network system identifier is displayed inaccurately because the intersection does not exist between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device can be avoided.

In a possible implementation manner, the determining, according to the anchor point information and whether there is an intersection between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device, a network system identifier displayed on a screen of the terminal device includes: if the anchor point information indicates that the first base station has the capability of providing dual-connection service and the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal equipment, determining to display the identification of the second network system on the screen of the terminal equipment; and if the anchor point information indicates that the first base station does not have the capability of providing the dual-connection service and/or the intersection between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal equipment does not exist, determining to display the identification of the first network system on the screen of the terminal equipment.

In the implementation manner, the identifier of the second network system is displayed only when the condition is met, so that the accuracy of displaying the identifier of the network system can be ensured.

In a possible implementation manner, the determining, before displaying the identifier of the second network system on the screen of the terminal device, further includes: detecting a cell of the second network system; or receiving an indication from the network side to add the cell of the second network system.

In the above implementation manner, after detecting the cell of the second network system (indicating that the cell of the second network system to which the terminal device can be connected is detected) or receiving the indication of adding the cell of the second network system (indicating that the terminal device will be connected to the cell of the second network system), if other conditions of displaying the second network system identifier are met, the second network system icon is displayed, so that the accuracy of displaying the network system identifier can be further improved.

In a possible implementation manner, the method further includes: if the cell of the second network system is not detected or the indication of adding the cell of the second network system is not received within the set time length, the identification of the first network system is determined to be displayed on the screen of the terminal equipment.

In a possible implementation manner, before determining whether the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device, the method further includes: receiving a first message from a network side; the first message is used for configuring the terminal equipment to measure the cell of the second network system or instructing the terminal equipment to add the cell of the second network system; and acquiring the frequency band of the second network system supported by the first base station contained in the first message.

The implementation manner can realize that the terminal equipment automatically judges whether the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal equipment.

Optionally, before receiving the first message from the network side, the method further includes: receiving a second message from the network side; acquiring a frequency band of the second network system supported by the core network contained in the second message; and if the intersection of the frequency band of the second network system supported by the core network and the frequency band of the second network system supported by the terminal equipment does not exist, determining to display the identification of the first network system on the screen of the terminal equipment.

In the implementation manner, the accuracy of displaying the network system identifier can be further improved by taking the intersection of the frequency band of the second network system supported by the core network and the frequency band of the second network system supported by the terminal device as one of the basis for determining the network system identifier.

Optionally, after receiving the anchor point information from the network side, the method further includes: receiving first indication information from a network side, wherein the first indication information is used for indicating the capability of a core network for supporting the double connection; the determining, according to the anchor point information and whether the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device, a network system identifier displayed on a screen of the terminal device includes: and determining a network system identifier displayed on a screen of the terminal equipment according to whether the anchor point information, the first indication information and the frequency band of the second network system supported by the first base station are intersected with the frequency band of the second network system supported by the terminal equipment.

In the implementation manner, the accuracy of displaying the network system identifier can be further improved by taking the capability of the core network for supporting the dual connection as one of the basis for determining the network system identifier.

In a possible implementation manner, the determining whether the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device includes: receiving second indication information from a network side, wherein the second indication information is used for indicating the capability of a core network to support the dual-connection and whether the intersection exists between a frequency band of the second network system supported by the first base station and a frequency band of the second network system supported by the terminal equipment; and determining whether the capability of the core network for supporting the double connection and the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal equipment according to the second indication information.

The implementation manner can realize that the core network judges whether the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal equipment, and notifies the terminal equipment.

Optionally, before receiving the second indication information from the network side, the method further includes: and sending the frequency band of the second network system supported by the terminal equipment to a network side.

In a second aspect, a communication method is provided and applied to a core network device, and the method includes: receiving a frequency band of a second network system supported by the terminal equipment and transmitted by the terminal equipment; acquiring a frequency band of the second network system supported by a first base station, wherein the first base station is a service base station of the terminal equipment, and the first base station is a base station of the first network system; and sending second indication information to the terminal equipment, wherein the second indication information is used for indicating whether the intersection exists between the frequency band of the second network system supported by the terminal equipment and the frequency band of the second network system supported by the first base station.

The optional second indication information is further used for indicating the capability of the core network to support dual connectivity; the dual connection includes a master connection between the terminal device and the first base station and a slave connection between the terminal device and a second base station, where the second base station is a base station of the second network system.

Optionally, the first network system is a long term evolution LTE system, and the second network system is a 5G system.

Taking the dual connection as an EN-DC as an example, if the intersection exists between the frequency band of the 5G system supported by the terminal device and the frequency band of the 5G system supported by the first base station (LTE base station), and the core network supports EN-DC, the core network sends unrestricted EN-DC information to the terminal device; if the frequency band of the 5G system supported by the terminal equipment does not intersect with the frequency band of the 5G system supported by the first base station (LTE base station), or the core network does not support EN-DC, the core network sends limited EN-DC information to the terminal equipment.

In a third aspect, there is provided an apparatus comprising: a processing unit and a receiving and transmitting unit; the processing unit is used for: receiving anchor point information from a network side through the transceiver unit, wherein the anchor point information is used for indicating the capability of a first base station to provide double-connection service, the double-connection comprises a master connection between the terminal equipment and the first base station and a slave connection between the terminal equipment and a second base station, the first base station is a base station of a first network system, and the second base station is a base station of a second network system; determining whether an intersection exists between a frequency band of the second network system supported by the first base station and a frequency band of the second network system supported by the terminal device; and determining a network system identifier displayed on a screen of the terminal device according to the anchor point information and whether an intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device, wherein the network system identifier comprises one of the identifier of the first network system and the identifier of the second network system.

In a fourth aspect, there is provided an apparatus comprising: a processing unit and a receiving and transmitting unit; the processing unit is used for: receiving a frequency band of a second network system supported by the terminal equipment and transmitted by the terminal equipment through the transceiver unit; acquiring a frequency band of the second network system supported by a first base station, wherein the first base station is a service base station of the terminal equipment, and the first base station is a base station of the first network system; and sending second indication information to the terminal equipment through the transceiver unit, wherein the second indication information is used for indicating whether the intersection exists between the frequency band of the second network system supported by the terminal equipment and the frequency band of the second network system supported by the first base station.

In a fifth aspect, there is provided an apparatus comprising: one or more processors; wherein the instructions of the one or more computer programs, when executed by the one or more processors, cause the apparatus to perform the method of any of the first aspect above, or to perform the method of any of the second aspect above.

In a sixth aspect, there is provided a readable storage medium comprising a computer program which, when run on a computing device, causes the computing device to perform the method of any of the first aspects or to perform the method of any of the second aspects.

In a seventh aspect, a chip system is provided, the chip system comprising at least one chip and a memory, the at least one chip being coupled to the memory for reading and executing program instructions stored in the memory to implement the method according to any of the first aspects or to implement the method according to any of the second aspects.

In an eighth aspect, there is provided a program product which, when invoked by a computer, causes the computer to perform the method of any of the first aspects or the second aspects.

The advantages of the second aspect to the eighth aspect are referred to as the advantages of the first aspect, and the description thereof will not be repeated.

Drawings

Fig. 1 is a schematic diagram of NSA networking mode of a 5G network according to an embodiment of the present application;

FIG. 2 is a schematic view of a screen of a smart phone according to an embodiment of the present application;

fig. 3 is a schematic flow chart of a communication method according to an embodiment of the present application;

fig. 4 is a schematic flow chart showing a network system icon under an EN-DC architecture according to an embodiment of the present application;

FIG. 5 is a flowchart illustrating a network system icon displayed under another EN-DC architecture according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of an apparatus according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of another device according to an embodiment of the present application.

Detailed Description

Referring to fig. 1, a schematic diagram of NSA networking mode of a 5G network according to an embodiment of the present application is shown. The NSA network includes an LTE base station 102, a 5G base station 103, and a core network 104.

The core network 104 may be an LTE core network or a 5G core network (next generation core nextwork, NGCN). For connection with the 5G core network, the LTE base station may be an enhanced LTE base station.

The terminal device 101 may be a User Equipment (UE), a handheld terminal, a notebook computer, a subscriber unit (subscriber unit), a cellular phone (cellular phone), a smart phone (smart phone), a personal digital assistant (personal digital assistant, PDA) computer, a tablet computer, a handheld device (handheld), an augmented reality (augmented reality, AR) device, a Virtual Reality (VR) device, a laptop computer (lap computer), a cordless phone (cordis phone) or a wireless local loop (wireless local loop, WLL) station, a machine type communication (machine type communication, MTC) terminal, or other devices that can access a network. The terminal device and the access network device communicate with each other using a new air interface (NR) technology or an LTE technology.

The terminal device may establish a dual connection with the network side, and a base station responsible for the control plane in the dual connection is called a control plane anchor point. For example, in the architecture shown in fig. 1, the terminal device 101 may use radio resources of the LTE base station 102 and the 5G base station 103 simultaneously in a connected state, and the terminal device 101 may establish an LTE-NR dual connection (e_utra-NR Dual Connectivity, EN-DC) with the LTE base station 102 and the 5G base station 103. LTE base station 102 is a base station providing EN-DC service for terminal equipment 101, and control plane signaling from terminal equipment 101 to the base station to the core network is responsible for LTE base station 102, so LTE base station 102 is the primary base station (or anchor station, or Master Node (MN)). The primary task of the 5G base station 103 is to provide data traffic flow bearers, so the 5G base station 103 is a secondary base station (or secondary node, SN). The communication connection between the terminal device 101 and the LTE base station 102 is referred to as a master connection, and the communication connection between the terminal device 101 and the 5G base station 103 is referred to as a slave connection.

The terminal device 101 first initiates a random access procedure from the LTE base station 102, establishing a primary connection with the LTE base station 102. When a certain condition (such as that the signal quality of the neighboring 5G cell is higher than a set threshold value) is met, the LTE base station 102 controls the terminal equipment 101 to access the 5G base station 103, and a slave connection is established between the terminal equipment 101 and the 5G base station 103, so that an EN-DC dual-connection architecture is formed.

The group (group) of cells (cells) in which the terminal device first initiates a random access procedure is called a master cell group (master cell group, MCG). In the architecture shown in fig. 1, a plurality of cells provided by LTE constitute an MCG, and a plurality of cells provided by 5G NR constitute a secondary cell group (secondary cell group, SCG). The cells of the MCG and the cells of the SCG are configured as neighbor cell relations.

In the NSA networking mode described above, the identifier of the network system (also referred to as an icon of the network system, or simply referred to as a system icon) displayed on the terminal device 101 is used to make the user aware of whether the system to which the terminal device is currently connected is an LTE system or a 5G system. For example, under the architecture shown in fig. 1, the identifier of the network system displayed on the terminal device 101 may indicate whether the terminal device is currently accessing the 5G core network through the LTE base station or accessing the 5G core network through the 5G base station. Fig. 2 is a partial schematic view of a screen of a smart phone, taking the smart phone as an example. As shown in fig. 2 (a), a network system icon 201a is displayed at the upper left corner of the screen of the terminal device 101 (as shown in the dashed box in the figure), and this network system icon 201a indicates that the terminal device is currently only accessing the access network of the LET system. As shown in fig. 2 (b), a network system icon 201b is displayed at the upper left corner of the screen of the terminal device 101 (as shown in the dashed box in the figure), and this network system icon 201b indicates that the terminal device has currently accessed the access network of the 5G system.

The 5G protocol organizes the system icon display schemes proposed by the global system for mobile communications association (Global System for Mobile communications Association, GSMA) to include ConfigA, configB, configC and ConfigD. Table 1 shows the above 4 system icon display schemes.

TABLE 1

The ConfigB scheme and the ConfigC scheme require that the terminal device also measures a new wireless (NR) network in an IDLE (IDLE) state, and since the terminal device cannot know the NR network frequency point information in the IDLE state, only full-frequency searching is performed, while the 5G system has a large bandwidth and many frequency points, and the full-frequency searching results in high power consumption of the terminal device, the ConfigB scheme and the ConfigC scheme are not generally used. The constraint of the Config a scheme is more stringent and is not generally used. The Config D scheme is currently commonly used.

When the ConfigD scheme is adopted, as long as the LTE cell is an anchor cell (LTE cell supporting NSA), a 5G system icon is displayed regardless of whether the terminal equipment is really registered in the 5G system, so that the problem of fake 5G can occur, namely, the 5G system icon is displayed on the terminal equipment, but the terminal equipment is not registered in the 5G system. For example, if the terminal device does not support the NR frequency band (such as the N7 frequency band of the 5G system) corresponding to the anchor cell, the terminal device cannot register to the 5G network, but the terminal device still displays the 5G system icon because the terminal device accesses the anchor cell. This may further lead to legal problems in some areas.

It can be understood that fig. 1 is only a schematic diagram of one NSA networking mode, and the embodiments of the present application may also be applicable to other NSA networking modes, that is, the LTE base station, the 5G base station, and the core network in fig. 1 may also be replaced by base stations and core networks of other network systems. In summary, the NSA networking architecture applicable to the embodiments of the present application includes a first base station and a second base station, where the first base station and the second base station belong to different network systems, the first base station is a master station, the second base station is a slave station, and the first base station, as a control plane anchor point, may be responsible for management of a control plane in dual connectivity.

In order to accurately display a system icon on a terminal device, a communication method and a related device are provided in the embodiments of the present application.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary. It should also be understood that in embodiments of the present application, "one or more" means one, two, or more than two; "and/or", describes an association relationship of the association object, indicating that three relationships may exist; for example, a and/or B may represent: a alone, a and B together, and B alone, wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

The plurality of the embodiments of the present application refers to greater than or equal to two. It should be noted that, in the description of the embodiments of the present application, the terms "first," "second," and the like are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance, or alternatively, for indicating or implying a sequential order.

Referring to fig. 3, a flow chart of a communication method according to an embodiment of the present application is provided. The flow may be implemented on the terminal device, may be performed by the terminal device, or may be performed by means in the terminal device. The apparatus may be implemented in hardware, software, or a combination of hardware and software.

As shown in fig. 3, the flow of the communication method may include the steps of:

step 301: and receiving anchor point information from a network side, wherein the anchor point information is used for indicating the capability of the first base station for providing the double-connection service.

The dual connection includes a master connection between the terminal device and a first base station and a slave connection between the terminal device and a second base station, where the first base station is a base station of the first network system, and is also referred to as a master base station or an anchor base station or a control plane anchor point in the dual connection, and the second base station is a base station of the second network system, and is also referred to as a slave base station in the dual connection. In a possible implementation, the first network system is an LTE system, the second network system is a 5G system, and optionally, the dual connection is an LTE-NR dual connection (e_utra-NR Dual Connectivity, EN-DC).

The terminal device may first perform random access at the first base station, and in this process, the terminal device receives system information sent by the first base station, and may obtain anchor point information from the received system information. Taking the system architecture shown in fig. 1 as an example, in the process of registering with the LTE network, the terminal device receives a system message sent by the LTE base station (i.e., the first base station), initiates random access, and attaches to the LTE network. In this procedure, the terminal device can obtain anchor information from an upper layer indication information (upper layer indication, ULI) field in a system information block 1 (SIB 1, where SIB is an english abbreviation of system information block, i.e., system information block) of the system message. The network side can indicate whether the LTE base station accessed by the terminal equipment at present can be used as a control plane anchor point of EN-DC dual connection through the value of the ULI field. Optionally, when the value of the anchor point information is 1, it indicates that the first base station can provide the dual-connectivity service for the terminal device, and when the value of the anchor point information is 0, it indicates that the first base station cannot provide the dual-connectivity service for the terminal device, and vice versa.

It may be appreciated that the anchor point information may indicate whether the cell accessed by the terminal device is an anchor point cell, for example, taking the system architecture shown in fig. 1 as an example, and the anchor point indication information may indicate whether the LTE cell currently accessed by the terminal device is an LTE cell supporting NSA.

Step 302: it is determined whether there is an intersection of the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device.

The terminal device may determine whether the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device intersect by itself, or may determine whether the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device intersect according to the indication information from the network side. The two modes are described below.

Mode one: the terminal equipment automatically determines whether the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal equipment.

The terminal device may receive the frequency band of the second network system supported by the first base station on the network side, and compare the frequency band with the frequency band of the second network system supported by the terminal device, so as to determine whether there is an intersection between the two. For example, the terminal device receives the first message from the network side, acquires the frequency band of the second network system supported by the first base station included in the first message, and compares the frequency band with the frequency band of the second network system supported by the terminal itself.

Optionally, the first message is used for configuring the terminal device to measure the cell of the second network system, and the first message includes the frequency band of the second network system supported by the first base station, so that the terminal can measure the cell of the second network system accordingly. Taking the system architecture shown in fig. 1 as an example, after a terminal device registers in an LTE network, NSA supported by the terminal device may be reported to an LTE base station, the LTE base station issues B1 measurement to the terminal device, and NR frequency information (i.e., NR band supported by the LTE base station) that needs to be measured by the terminal device is sent to the terminal device through a radio resource control (redio resource control, RRC) reconfiguration message.

Alternatively, the first message may be a message instructing the terminal device to add a cell of the second network system, which includes a frequency band of the second network system supported by the first base station. Taking the system architecture shown in fig. 1 as an example, the terminal device may measure the 5G cell according to the indication of the network side, for example, obtain the NR synchronization signal and measure the signal quality of the 5G cell, and report the measurement result to the LTE base station, for example, the terminal device may report the measured cell of the 5G system with the signal strength higher than the set threshold to the LTE base station through a measurement report. And the LTE base station decides whether to add the SCG according to the measurement result reported by the terminal equipment, and if so, sends an SCG adding message to the terminal equipment, wherein the SCG adding message comprises related information (such as frequency point information) indicating the 5G cell added by the terminal equipment, and the frequency point information can be NR band supported by the LTE base station or a subset thereof. In other scenarios, the LTE base station may not need to send an SCG adding message to the terminal device depending on a measurement report reported by the terminal device, and the LTE base station may send the SCG adding message to the terminal device based on other measurement events or other reasons, which is not limited in the embodiments of the present application.

In a possible implementation manner, the supporting capability of the core network to the dual connection may be further used as one of the basis for determining the network system icon. For example, after the terminal device receives the anchor point information from the network side, it may also receive first indication information from the network side, where the first indication information is used to indicate the capability of the core network to support dual connectivity. When the terminal equipment determines the network system icon, if the core network does not support dual-connection according to the first indication information, the second network system icon is not displayed.

In a possible implementation, taking EN-DC as an example, the first indication information may be limited EN-DC information or non-limited EN-DC information. For example, if the core network supports EN-DC, transmitting unrestricted EN-DC information to the terminal device; if the core network does not support EN-DC, limited EN-DC information is sent to the terminal device. Alternatively, the value of the unrestricted EN-DC information may be 1 and the value of the restricted EN-DC may be 0, or vice versa.

In one possible implementation, after the terminal device performs random access at the first base station, the terminal device may receive an attach accept (attach accept) message at the network side, where the attach accept message carries first indication information (such as limited/non-limited EN-DC information).

An example of a communication procedure employing the above-described mode one may be as shown in fig. 4 below.

Mode two: and the terminal equipment determines whether the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal equipment according to the indication information from the network side.

The core network may determine whether there is an intersection between the frequency band of the second network system supported by the terminal device and the frequency band of the second network system supported by the first base station, and send second indication information to the terminal device, where the second indication information is used to indicate whether there is an intersection between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device. The terminal device may determine whether there is an intersection of the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device according to the second indication information from the core network.

Optionally, before receiving the second indication information from the network side, the terminal device may further send a frequency band of the second network system supported by the terminal device to the core network, so that the core network determines whether an intersection exists between the frequency band of the second network system supported by the terminal device and the frequency band of the second network system supported by the first base station.

Optionally, the second indication information may also be used to indicate the capability of the core network to support dual connectivity, for example, the second indication information may indicate whether the core network supports dual connectivity. Wherein the dual connectivity comprises a master connection between the terminal device and the first base station and a slave connection between the terminal device and the second base station.

In one possible implementation, taking EN-DC as an example, the second indication information may be limited EN-DC information or non-limited EN-DC information. For example, if the core network supports EN-DC and there is an intersection of NR band supported by the terminal device (i.e., a frequency band of the second network system) and NR band supported by the first base station (LTE base station), unrestricted EN-DC information is transmitted to the terminal device; if the core network does not support EN-DC or there is no intersection of the NR band supported by the terminal device (i.e. the frequency band of the second network system) with the NR band supported by the first base station (LTE base station), limited EN-DC information is transmitted to the terminal device. Alternatively, the value of the unrestricted EN-DC information may be 1 and the value of the restricted EN-DC may be 0, or vice versa.

In one possible implementation, after the terminal device performs random access at the first base station, the terminal device may receive an attach accept (attach accept) message at the network side, where the attach accept message carries second indication information (such as limited/non-limited EN-DC information).

The second mode can use second indication information (such as limited/non-limited EN-DC information) to indicate whether the core network supports dual connection and whether the frequency band of the second network system supported by the terminal device intersects with the frequency band of the second network system supported by the first base station, so that network resource overhead can be saved on one hand, and the core network performs the above judgment on the other hand, so that the overhead of the terminal device can be saved.

An example of a communication procedure in the second mode described above can be as shown in fig. 5 below.

Step 303: and determining a network system identifier displayed on a screen of the terminal equipment according to the received anchor point information and whether the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal equipment, wherein the network system identifier comprises one of the identifier of the first network system and the identifier of the second network system.

Optionally, after determining the network system identifier, the terminal device further displays the network system icon on a screen of the terminal device.

In the embodiment of the present application, if the anchor point information indicates that the first base station has the capability of providing the dual-connectivity service, and the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device, it is determined that the identifier of the second network system is displayed on the screen of the terminal device. If the anchor point information indicates that the first base station does not have the capability of providing the dual-connection service and/or the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal equipment, the identification of the first network system is determined to be displayed on the screen of the terminal equipment.

In a possible implementation manner, the terminal device may determine and display the identifier of the second network system on the screen of the terminal device when the condition for displaying the identifier of the second network system is determined to be met, so that the identifier of the second network system may be displayed when the accessible cell of the second network system is detected, without waiting until the cell of the second network system is accessed, and thus the delay of displaying the identifier of the second network system may be reduced. Optionally, if the cell of the second network system is not detected within the set duration, the terminal device may determine to display the identifier of the first network system on the screen of the terminal device.

In another possible implementation manner, the terminal device may determine and display the identifier of the second network system on a screen of the terminal device when it is determined that the condition for displaying the identifier of the second network system is satisfied, and when an instruction to add the cell of the second network system is received from the network side. Optionally, if the terminal device does not receive the indication of adding the cell of the second network system within the set duration, the terminal device may determine to display the identifier of the first network system on the screen of the terminal device.

In a possible implementation manner, the supporting capability of the core network to the dual connection may be further used as one of the basis for determining the network system icon. For example, in the case of the first mode, the terminal device receives the first indication information (for indicating the capability of the core network to support dual connectivity) sent by the network side, and determines, according to the anchor point information, the first indication information, and whether there is an intersection between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device, the network system identifier displayed on the screen of the terminal device.

In one possible implementation manner, whether the intersection exists between the frequency band of the second network system supported by the core network and the frequency band of the second network system supported by the terminal device may be further used as one of the basis for determining the network system icon. For example, before receiving the first message from the network side, the terminal device may also receive a second message from the network side, and the terminal device may acquire a frequency band of a second network system supported by the core network included in the second message. If no intersection exists between the frequency band of the second network system supported by the core network and the frequency band of the second network system supported by the terminal equipment, determining that the network system icon to be displayed is the icon of the first network system.

In the flow shown in fig. 3, since "whether there is an intersection between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device" is taken as one of the bases for determining the network system identifier, it is possible to avoid the problem that the network system identifier is displayed inaccurately because the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device are not intersected to display the second network system identifier.

Taking the system architecture shown in fig. 1 as an example, the method provided in the embodiment of the present application may be used when a terminal device accesses a network, and compared with the above-mentioned ConfigB scheme and ConfigC scheme, it is not necessary for the terminal device to measure the NR network in an IDLE (IDLE) state, so that power consumption of the terminal device may be saved.

In addition, in some embodiments of the present application, in the case that the network side supports EN-DC dual connectivity, the terminal device only needs to detect the 5G cell, which indicates that the subsequent access to the 5G cell is possible (for example, when the signal quality of the 5G cell is better, or when the data transmission of the terminal device needs to meet a certain requirement), therefore, the 5G system icon may be displayed, and compared with the ConfigA scheme with stricter constraint conditions, in the embodiment of the present application, the condition for displaying the 5G system icon is looser, and meanwhile, the accuracy can also be ensured.

In addition, in some embodiments of the present application, in the case where the LTE cell is an anchor cell, it is further required to satisfy "there is an intersection between the NR band supported by the terminal device and the NR band supported by the LTE base station" to display the 5G system icon, which can avoid the occurrence of the false 5G case, that is, displaying the 5G system icon on the terminal device, compared with the above-mentioned ConfigD scheme, which means that the terminal device registers to the 5G system or that the terminal device may register to the 5G system (for example, in the case where the signal quality of the 5G cell is better or in the case where the terminal device has a higher rate data transmission requirement).

Referring to fig. 4, a flow chart of a communication method according to an embodiment of the present application is provided. The method shown in fig. 4 is illustrated by way of example in an EN-DC dual connectivity architecture. The process determines and displays a system icon by the terminal device based on whether an intersection exists between the NR band supported by the terminal device and the NR band supported by the LTE base station. The process adopts the mode one to determine whether an intersection exists between the NR band supported by the terminal equipment and the NR band supported by the LTE base station.

As shown in fig. 4, the flow includes the steps of:

step 401: the terminal equipment is registered to the LTE network, and a network searching module in the terminal equipment receives a system message from the LTE base station and acquires anchor point information in the system message. The anchor point information is used for indicating whether the LTE base station is an anchor point base station.

The anchor information may be a boolean type parameter for indicating whether the LTE base station is an anchor base station. For example, when the value of the anchor point information is equal to 1, it indicates that the LTE base station is an anchor point base station or has an anchor point function; when the value of the anchor point information is equal to 0, the LTE base station is not an anchor point base station or does not have an anchor point function.

Step 402: the network searching module in the terminal equipment receives the limited/non-limited EN-DC indication information sent by the network side and reports the anchor point information and the limited/non-limited EN-DC indication information to an upper layer of the terminal equipment, wherein the upper layer can be an upper layer relative to a physical layer, for example, an application layer.

The limited/non-limited EN-DC indication information may be a boolean type parameter. For example, when the value of the limited/non-limited EN-DC indication information is equal to 1, it indicates that EN-DC is not limited, i.e. the network side supports EN-DC dual-connection, and the terminal device may establish EN-DC dual-connection with the network side; when the value of the limited/non-limited indication information is equal to 0, the EN-DC limitation is indicated, namely the network side does not support EN-DC dual-connection, and the terminal equipment cannot establish EN-DC dual-connection with the network side.

Alternatively, the LTE base station may send an attach accept (attach accept) message to the terminal device, carrying limited/non-limited EN-DC indication information. The terminal device may obtain the limited/non-limited EN-DC indication information sent by the network side from the message.

Step 403: the network searching module in the terminal equipment receives the information of the NR Band sent by the network side, wherein the NR Band is the NR Band supported by the network (such as a core network), and the NR Band supported by the network is intersected with the NR Band supported by the terminal equipment.

Step 404: if there is no intersection, go to step 409, otherwise go to step 405.

Alternatively, the terminal device may acquire information of NR bands supported by the network from an NR band list (NR band list) message sent by the network side.

Step 405: and the terminal equipment receives the B1 measurement event information issued by the LTE base station, executes the B1 event measurement according to the received B1 measurement event information and reports the measurement result. The terminal equipment acquires NR Band information (used for indicating RN Band supported by the LTE base station) corresponding to the LTE base station currently accessed by the terminal equipment from the B1 measurement event information, and acquires an intersection of the NR Band supported by the LTE base station and the NR Band supported by the terminal equipment.

Step 406: the terminal equipment receives an SCG adding message sent by the LTE base station, adds SCG, reports the added SCG information to an upper layer, acquires NR Band information corresponding to the LTE base station currently accessed by the terminal equipment in the SCG adding message, and the network searching module in the terminal equipment acquires an intersection of NR Band of the LTE base station and NR Band supported by the terminal equipment.

Step 407: if the corresponding NR Band of the LTE base station has an intersection with the NR Band supported by the terminal device, the step 408 is shifted to, otherwise, the step 409 is shifted to.

In a possible implementation manner, if in step 405, the terminal device can obtain the NR band supported by the LTE base station from the B1 measurement event information sent by the network side and perform the above-mentioned operation of taking the intersection, in step 406, also can obtain the NR band supported by the LTE base station from the added SCG message sent by the network side and perform the above-mentioned operation of taking the intersection, then the terminal device may perform the subsequent steps according to the result of taking the intersection in step 406.

In another possible implementation manner, if in step 405, the terminal device fails to obtain the NR band supported by the LTE base station from the B1 measurement event information sent by the network side, in step 406, the terminal device can obtain the NR band supported by the LTE base station from the added SCG message sent by the network side, and perform the intersection taking operation, and then the terminal device performs the subsequent step according to the intersection taking result in step 406.

In another possible implementation manner, if in step 405, the terminal device is able to obtain the NR band supported by the LTE base station from the B1 measurement event information sent by the network side, and perform the above operation of taking the intersection, and in step 406, the terminal device fails to obtain the NR band supported by the LTE base station from the SCG addition message sent by the network side, then the terminal device performs the subsequent steps according to the result of taking the intersection in step 405.

Step 408: the network searching module of the terminal equipment reports NR band supporting indication information to an upper layer (such as an application layer), wherein the indication information is used for indicating the terminal equipment to support NR band of a network side.

The NR band support indication information may be a boolean type parameter for indicating whether the terminal device supports NR band on the network side. For example, if the terminal device supports NR band on the network side, the value of the indication information is equal to 1; if the terminal equipment does not support NR band at the network side, the value of the indication information is equal to 0.

Step 409: the network searching module of the terminal equipment reports the NR band supporting indication information of the terminal equipment to an upper layer (such as an application layer), wherein the indication information is used for indicating that the terminal equipment does not support NR band of a network side, and the value of the indication information is 0.

Step 410: and determining the icon of the network system by the upper layer of the terminal equipment according to the anchor point information, the limited/non-limited EN-DC indication information and the NR band support indication information, and displaying the determined icon of the network system on a screen of the terminal equipment.

Specifically, if the anchor point information indicates that the LTE base station is an anchor point base station, the limited/non-limited EN-DC indication information indicates that the network side supports EN-DC dual connection, and the NR band support indication information indicates that an intersection exists between an NR band supported by the terminal device and an NR band supported by the LTE base station, an upper layer of the terminal device determines to display a 5G system icon. If the anchor point information indicates that the LTE base station is not the anchor point base station, the limited/non-limited EN-DC indication information indicates that the network side does not support EN-DC dual connection, and the NR band support indication information indicates that the NR band supported by the terminal equipment does not have intersection with the NR band supported by the LTE base station, the upper layer of the terminal equipment determines to display a 4G system icon.

For example, taking the meaning that the information is a boolean parameter and the value of the parameter as an example, the upper layer of the terminal device may perform a logical and operation on the information, if the result of the logical and operation is equal to 1, the upper layer of the terminal device determines to display the 5G system icon, and if the result of the logical and operation is equal to 0, the upper layer of the terminal device determines to display the 4G system icon.

In a possible implementation manner, if the terminal device does not receive the B1 measurement event information or adds the SCG message within a set time, NR band support indication information may be sent to an upper layer to indicate that the terminal device does not support NR band on the network side.

In some scenarios, the network side may not send the B1 measurement event information to the terminal device, i.e. may send the SCG addition message to the terminal device without based on the B1 event measurement report sent by the terminal device, in which case the terminal device may skip step 405 described above, and directly perform step 406.

Referring to fig. 5, a flow chart of another communication method according to an embodiment of the present application is provided. The method shown in fig. 5 is illustrated by way of example in an EN-DC dual connectivity architecture. The process determines and displays a system icon by the terminal device based on whether an intersection exists between the NR band supported by the terminal device and the NR band supported by the LTE base station. The process adopts the second mode to determine whether an intersection exists between the NR band supported by the terminal equipment and the NR band supported by the LTE base station.

As shown in fig. 5, the flow includes the steps of:

step 501: the terminal equipment registers to the LTE network and sends NR band information supported by the terminal equipment to the core network.

Step 502: and a network searching module in the terminal equipment receives the system message from the LTE base station and acquires anchor point information in the system message. The anchor point information is used for indicating whether the LTE base station is an anchor point base station. The network searching module of the terminal equipment can send the anchor point information to an upper layer. The upper layer may be an upper layer with respect to the physical layer, such as an application layer.

Step 503: after receiving the information of the NR band supported by the terminal equipment and sent by the terminal equipment, the core network acquires the information of the NR band of the base station (here, the LTE base station) where the terminal equipment is located, and acquires the intersection of the NR band supported by the terminal equipment and the NR band of the base station, and sends limited/non-limited EN-DC indication information to the terminal equipment.

If the NR Band supported by the base station has an intersection with the NR Band supported by the terminal equipment, the value of the limited/non-limited EN-DC indication information sent by the core network to the terminal equipment indicates that the network side supports EN-DC dual connection, and the NR Band supported by the terminal equipment has an intersection with the NR Band of the current base station (LTE base station). If the NR Band supported by the base station does not have an intersection with the NR Band supported by the terminal equipment, the core network sends limited/non-limited EN-DC indication information to the terminal equipment, wherein the value of the limited/non-limited EN-DC indication information indicates that the network does not support EN-DC dual connection, and the NR Band supported by the terminal equipment does not have an intersection with the NR Band of the current base station (LTE base station).

The limited/non-limited EN-DC indication information may be a boolean type parameter. For example, when the value of the limited/non-limited EN-DC indication information is equal to 1, it indicates that EN-DC is not limited, i.e. the terminal device may establish an EN-DC dual connection with the network side (due to the intersection of NR band supported by the terminal device and NR band of the LTE base station); when the value of the limited/non-limited indication information is equal to 0, it indicates that EN-DC is limited, i.e. the terminal device cannot establish EN-DC dual connection with the network side (since the NR band supported by the terminal device has no intersection with the NR band of the LTE base station).

Alternatively, the core network may send the limited/non-limited EN-DC indication information to the terminal device carrying an attach accept message.

And after the network searching module in the terminal equipment receives the limited/non-limited EN-DC indication information, the limited/non-limited EN-DC indication information can be reported to an upper layer.

Step 504: after receiving the SCG adding message, the network searching module of the terminal equipment executes the operation of adding the SCG and reports the SCG adding indication information to an upper layer.

The SCG addition indication information may be a boolean parameter, for example, if the value of the SCG addition indication information is equal to 1, it indicates that the terminal device successfully performs the SCG addition operation according to the SCG addition message, and if the value of the SCG addition indication information is equal to 0, it indicates that the terminal device fails to perform the SCG addition operation, i.e. fails to add the SCG.

Step 505: and determining the icon of the network system by the upper layer of the terminal equipment according to the anchor point information, the limited/non-limited EN-DC indicating information and the SCG adding indicating information, and displaying the determined icon of the network system on a screen of the terminal equipment.

Specifically, if the anchor point information indicates that the LTE base station is an anchor point base station, the limited/non-limited EN-DC indication information indicates that an intersection exists between NR bands supported by the terminal device and NR bands of the LTE base station, and the SCG addition indication information indicates that the terminal device adds an SCG, an upper layer of the terminal device determines to display a 5G system icon. And if the anchor point information indicates that the LTE base station is not the anchor point base station, or the limited/non-limited EN-DC indication information indicates that the NR band supported by the terminal equipment does not have an intersection with the NR band of the LTE base station, or the SCG addition indication information indicates that the terminal equipment does not add SCG, the upper layer of the terminal equipment determines to display the 4G system icon.

In a possible implementation manner, if the terminal device does not receive the SCG adding message within a set time, the SCG adding indication information may be sent to an upper layer, where a value of the indication information indicates that the terminal device fails to add. In another possible implementation manner, if the upper layer of the terminal device does not receive the SCG addition indication information within a set time (for example, the terminal device does not receive the SCG addition indication information, and therefore does not send the SCG addition indication information to the upper layer), the upper layer of the terminal device may default the value of the SCG addition indication information to a value indicating that the terminal device fails to add the SCG.

The embodiments of the present application also provide an apparatus based on the same concept as the embodiments of the method described above.

Referring to fig. 6, a schematic structural diagram of an apparatus according to an embodiment of the present application is provided. The device 600 may comprise a processing unit 601 and a transceiving unit 602.

In one possible implementation, the apparatus 600 is a terminal device. Taking the apparatus 600 as an example of a terminal device, the processing unit 601 may be configured to: receiving anchor point information from a network side through a transceiver unit 602, wherein the anchor point information is used for indicating the capability of a first base station for providing dual-connection service; the dual connection comprises a master connection between the terminal equipment and the first base station and a slave connection between the terminal equipment and a second base station, wherein the first base station is a base station of a first network system, and the second base station is a base station of a second network system; determining whether an intersection exists between a frequency band of the second network system supported by the first base station and a frequency band of the second network system supported by the terminal device; and determining a network system identifier displayed on a screen of the terminal device according to the anchor point information and whether an intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device, wherein the network system identifier comprises one of the identifier of the first network system and the identifier of the second network system.

The above device provided in the embodiment of the present application can implement all the method steps implemented by the terminal device in the embodiment of the method, and can achieve the same technical effects, and the parts and beneficial effects that are the same as those of the embodiment of the method in the embodiment are not described in detail herein.

In another possible implementation, the apparatus 600 is a core network device. Taking the apparatus 600 as a core network device for example, the processing unit 601 may be configured to: receiving, by the transceiver 602, a frequency band of a second network system supported by a terminal device and sent by the terminal device; acquiring a frequency band of the second network system supported by a first base station; the first base station is a service base station of the terminal equipment, and the first base station is a base station of a first network system; and sending second indication information to the terminal device through the transceiver unit 602, where the second indication information is used to indicate whether the frequency band of the second network system supported by the terminal device and the frequency band of the second network system supported by the first base station have intersection.

The above device provided in the embodiment of the present application can implement all the method steps implemented by the core network device in the embodiment of the method, and can achieve the same technical effects, and the same parts and beneficial effects as those in the embodiment of the method are not described in detail herein.

Based on the same technical concept, the embodiment of the application also provides a device, which can realize the functions realized by the related equipment in the embodiment. As shown in fig. 7, the apparatus 700 may include a transceiver 701, a memory 703, and a processor 702, and the transceiver 701, the memory 703, and the processor 702 may be connected through a bus 704. The transceiver 701 may be used for communication by a device, such as for transmitting or receiving signals. The memory 703 is coupled to the processor 702 and is operable to store programs and data necessary for the apparatus 700 to perform various functions. The above memory 703 and the processor 702 may be integrated or independent.

By way of example, the transceiver 701 may be a communication port, such as a communication port (or interface) for communication between devices. The transceiver 701 may also be referred to as a transceiving unit or a communication unit. The processor 702 may be implemented by a processing chip or processing circuit. The transceiver 701 may receive or transmit information wirelessly or by wire.

In addition, according to the needs of practical use, the device provided by the embodiment of the application may include a processor, and the processor invokes an external transceiver and/or a memory to implement the functions or steps or operations described above. The apparatus provided in the embodiments of the present application may also include a memory, where the processor invokes and executes a program stored in the memory to implement the functions or steps or operations described above. Alternatively, the device provided in the embodiments of the present application may also include a processor and a transceiver (or a communication interface), where the processor invokes and executes a program stored in an external memory to implement the functions or steps or operations described above. Alternatively, the device provided in the embodiments of the present application may also include a processor, a memory, and a transceiver.

Based on the same concept as the above method embodiments, there is further provided in this embodiment a readable storage medium, on which program instructions (or called computer program, instructions) are stored, which when executed by a processor, cause the computer to perform operations performed by a terminal device or a core network device in any one of possible implementation manners of the above method embodiments, method embodiments.

Based on the same concept as the above method embodiments, the present application further provides a program product, including program instructions, which when invoked by a computer to execute the program product, may cause the computer to implement the operations performed by the terminal device or the core network device in any one of the possible implementation manners of the above method embodiments.

Based on the same conception as the above method embodiments, the present application also provides a chip or a chip system comprising one or more chips coupled to a transceiver for implementing the operations performed by the terminal device or the core network device in any one of the possible implementations of the above method embodiments. The chip system may include the chip, as well as components including memory, communication interfaces, and the like.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A communication method, applied to a terminal device, the method comprising:

receiving anchor point information from a network side, wherein the anchor point information is used for indicating the capability of a first base station for providing double-connection service; the dual connection comprises a master connection between the terminal equipment and the first base station and a slave connection between the terminal equipment and a second base station, wherein the first base station is a base station of a first network system, and the second base station is a base station of a second network system;

determining whether an intersection exists between a frequency band of the second network system supported by the first base station and a frequency band of the second network system supported by the terminal device;

and determining a network system identifier displayed on a screen of the terminal equipment according to the anchor point information and whether an intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal equipment, wherein the network system identifier comprises one of the identifier of the first network system and the identifier of the second network system.

2. The method of claim 1, wherein the determining the network system identification displayed on the screen of the terminal device according to the anchor point information and whether there is an intersection of the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device comprises:

If the anchor point information indicates that the first base station has the capability of providing dual-connection service and the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal equipment, determining to display the identification of the second network system on the screen of the terminal equipment;

and if the anchor point information indicates that the first base station does not have the capability of providing the dual-connection service and/or the intersection between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal equipment does not exist, determining to display the identification of the first network system on the screen of the terminal equipment.

3. The method of claim 2, wherein the determining further comprises, prior to displaying the identification of the second network system on a screen of the terminal device:

detecting a cell of the second network system; or alternatively, the first and second heat exchangers may be,

an indication from the network side to add a cell of the second network system is received.

4. A method as recited in claim 3, further comprising:

if the cell of the second network system is not detected or the indication of adding the cell of the second network system is not received within the set time length, the identification of the first network system is determined to be displayed on the screen of the terminal equipment.

5. The method according to any of claims 1-4, wherein the determining whether there is an intersection of the frequency band of the second network system supported by the first base station with the frequency band of the second network system supported by the terminal device further comprises:

receiving a first message from a network side; the first message is used for configuring the terminal equipment to measure the cell of the second network system or instructing the terminal equipment to add the cell of the second network system;

and acquiring the frequency band of the second network system supported by the first base station contained in the first message.

6. The method of claim 5, wherein prior to receiving the first message from the network side, further comprising:

receiving a second message from a network side, and acquiring a frequency band of the second network system supported by a core network contained in the second message;

the method further comprises the steps of:

and if the intersection of the frequency band of the second network system supported by the core network and the frequency band of the second network system supported by the terminal equipment does not exist, determining to display the identification of the first network system on the screen of the terminal equipment.

7. The method of claim 5 or 6, wherein after receiving the anchor point information from the network side, further comprising:

receiving first indication information from a network side, wherein the first indication information is used for indicating the capability of a core network for supporting the double connection;

the determining, according to the anchor point information and whether the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device, a network system identifier displayed on a screen of the terminal device includes:

and determining a network system identifier displayed on a screen of the terminal equipment according to whether the anchor point information, the first indication information and the frequency band of the second network system supported by the first base station are intersected with the frequency band of the second network system supported by the terminal equipment.

8. The method according to any of claims 1-4, wherein the determining whether there is an intersection of the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal device comprises:

receiving second indication information from a network side, wherein the second indication information is used for indicating the capability of a core network to support the dual-connection and whether the intersection exists between a frequency band of the second network system supported by the first base station and a frequency band of the second network system supported by the terminal equipment;

And determining whether the capability of the core network for supporting the double connection and the intersection exists between the frequency band of the second network system supported by the first base station and the frequency band of the second network system supported by the terminal equipment according to the second indication information.

9. The method of claim 8, wherein prior to receiving the second indication information from the network side, further comprising:

and sending the frequency band of the second network system supported by the terminal equipment to a network side.

10. The method according to any of claims 1-9, wherein the first network system is a long term evolution, LTE, system and the second network system is a 5G system.

11. A communication method, applied to a core network device, the method comprising:

receiving a frequency band of a second network system supported by the terminal equipment and transmitted by the terminal equipment;

acquiring a frequency band of the second network system supported by a first base station; the first base station is a service base station of the terminal equipment, and the first base station is a base station of a first network system;

and sending second indication information to the terminal equipment, wherein the second indication information is used for indicating whether the intersection exists between the frequency band of the second network system supported by the terminal equipment and the frequency band of the second network system supported by the first base station.

12. The method of claim 11, wherein the second indication information is further used to indicate a capability of a core network to support dual connectivity; the dual connection includes a master connection between the terminal device and the first base station and a slave connection between the terminal device and a second base station, where the second base station is a base station of the second network system.

13. The method of claim 11 or 12, wherein the first network system is a long term evolution, LTE, system and the second network system is a 5G system.

14. An apparatus, comprising: a processing unit and a receiving and transmitting unit;

the processing unit is used for:

receiving anchor point information from a network side through the transceiver unit, wherein the anchor point information is used for indicating the capability of a first base station for providing double-connection service; the dual connection comprises a master connection between the terminal equipment and the first base station and a slave connection between the terminal equipment and a second base station, wherein the first base station is a base station of a first network system, and the second base station is a base station of a second network system;

determining whether an intersection exists between a frequency band of the second network system supported by the first base station and a frequency band of the second network system supported by the terminal device; and

15. An apparatus, comprising: a processing unit and a receiving and transmitting unit;

the processing unit is used for:

receiving a frequency band of a second network system supported by the terminal equipment and transmitted by the terminal equipment through the transceiver unit;

and sending second indication information to the terminal equipment through the transceiver unit, wherein the second indication information is used for indicating whether the intersection exists between the frequency band of the second network system supported by the terminal equipment and the frequency band of the second network system supported by the first base station.

16. An apparatus, comprising: one or more processors; wherein the instructions of the one or more computer programs, when executed by the one or more processors, cause the apparatus to perform the method of any of claims 1-10 or perform the method of any of claims 11-13.

17. A computer readable storage medium, characterized in that the computer readable storage medium comprises a computer program which, when run on a computing device, causes the computing device to perform the method of any one of claims 1-10 or to perform the method of any one of claims 11-13.

18. A chip system comprising at least one chip and a memory, the at least one chip being coupled to the memory for reading and executing program instructions stored in the memory to implement the method of any one of claims 1-10 or to implement the method of any one of claims 11-13.

19. A computer program product, characterized in that the computer program product, when called by a computer, causes the computer to perform the method according to any of claims 1-10 or to perform the method according to any of claims 11-13.