Cell selection method and apparatus for dual connectivity network, communication device and storage medium

Abstract

The embodiments of the present disclosure disclose a cell selection method and device for a dual connectivity network, a communication device and a storage medium. The method is executed by a terminal, and the method comprises: in response to the terminal camping on a long term evolution (LTE) base station and a radio link failure (RLF) caused by the terminal not supporting a carrier and / or a bandwidth, determining a selection strategy of the terminal selecting an evolved base station and a new radio base station dual connectivity (ENDC) cell according to ongoing service; and determining a cell to be connected based on the selection strategy to perform data transmission. Compared with a mode of only using a fixed cell to perform service transmission, the selection of the ENDC cell can adapt to the RLF, can reduce the occurrence of a network connection failure of the terminal, and can improve the stability of the network connection of the terminal, thereby improving the experience of a user.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of wireless communication, and more particularly to a cell selection method and apparatus for dual connectivity network, a communication device and a storage medium. BACKGROUND

[0002] The fifth-generation mobile communication network (5G) is divided into two networking modes: non-standalone and standalone. The non-standalone uses dual connectivity, and the 5G new radio control plane is anchored in the 4G network and communicates based on the 4G core network. The standalone directly accesses the 5G core network and no longer depends on the 4G network, which is a complete standalone 5G network.

[0003] In the related art, some terminals are limited by hardware in the evolved base station and new radio base station dual connectivity (ENDC, EUTRA-NR Dual Connectivity) scenario. If the 4G network is configured with carrier aggregation (CA, Carrier Aggregation), some bandwidths of 5G under ENDC cannot be supported on some carriers. As a result, the terminal frequently experiences radio link failure (RLF, Radio Link Failure), which seriously affects the user experience. SUMMARY

[0004] The present disclosure discloses a cell selection method and apparatus for dual connectivity network, a communication device and a storage medium.

[0005] According to a first aspect of the present disclosure, a cell selection method for dual connectivity network is provided, the method is executed by a terminal, and the method comprises:

[0006] In response to the terminal camping on a long term evolution (LTE) base station and a radio link failure (RLF) caused by the terminal not supporting a carrier and / or a bandwidth, determining a selection strategy of the terminal selecting an evolved base station and new radio base station dual connectivity (ENDC) cell according to ongoing traffic;

[0007] Determining a cell to be connected based on the selection strategy to perform data transmission.

[0008] In one embodiment, the method further comprises:

[0009] According to the counting result of the RLF of the ongoing traffic, determining the selection strategy of the terminal selecting the ENDC cell, wherein the selection strategy at least indicates: a rule of the terminal selecting a first type of cell and / or a second type of cell; and the wireless communication quality of the second type of cell is better than that of the first type of cell.

[0010] In one embodiment, the method further comprises:

[0011] In response to the terminal determining each time that the combination of LTE single carrier and / or ENDC and new radio, NR, bandwidth is not supported resulting in RLF, the counting result is increased by a predetermined value.

[0012] In one embodiment, the determining the selection strategy of the terminal selecting the ENDC cell according to the counting result of the RLF of the service comprises:

[0013] In response to the counting number indicated by the counting result being greater than or equal to a number threshold, determining that the selection strategy of the terminal selecting the ENDC cell is a first selection strategy, wherein the first selection strategy at least indicates: inhibiting selection of the first type of cell and selection of the second type of cell.

[0014] Alternatively,

[0015] In response to the counting number indicated by the counting result being less than or equal to a number threshold, determining that the selection strategy of the terminal selecting the ENDC cell is a second selection strategy, wherein the second selection strategy at least indicates: selection of the first type of cell and inhibition of selection of the second type of cell.

[0016] In one embodiment, the determining the selection strategy of the terminal selecting the ENDC cell according to the counting result of the service comprises:

[0017] In response to the counting result of the RLF meeting a predetermined condition, determining the selection strategy of the terminal selecting the ENDC cell according to the type of the service transmission.

[0018] In one embodiment, the determining the selection strategy of the terminal selecting the ENDC cell according to the type of the service transmission comprises:

[0019] In response to the type of the service transmission being data service transmission, determining that the selection strategy of the terminal selecting the ENDC cell is a first selection strategy, wherein the first selection strategy at least indicates: inhibition of selection of the first type of cell and selection of the second type of cell.

[0020] Alternatively,

[0021] In response to the type of the service transmission being non-data service transmission, determining that the selection strategy of the terminal selecting the ENDC cell is a second selection strategy, wherein the second selection strategy at least indicates: selection of the first type of cell and inhibition of selection of the second type of cell; the wireless communication quality of the second type of cell is better than that of the first type of cell.

[0022] In one embodiment, the method further comprises:

[0023] in response to determining that the terminal selects the selection policy of the ENDC cell as the second selection policy, performing the service transmission by using the first selection policy at a predetermined time after performing the service transmission based on the second selection policy;

[0024] or,

[0025] in response to determining that the terminal selects the selection policy of the ENDC cell as the second selection policy and the signal quality of the serving cell of the terminal is less than a signal quality threshold, performing the service transmission by using the first selection policy.

[0026] In one embodiment, the method further comprises:

[0027] in response to the terminal selecting the first type of cell, displaying a first identifier indicating the first type of cell;

[0028] or,

[0029] in response to the terminal selecting the second type of cell, displaying a second identifier indicating the second type of cell.

[0030] According to a second aspect of the embodiments of the present disclosure, a cell selection apparatus of a dual connectivity network is provided, and the apparatus comprises:

[0031] a determining module configured to: in response to a terminal camping on a long term evolution (LTE) base station and a radio link failure (RLF) due to the terminal not supporting a carrier and a bandwidth, determine, according to a service performed, a selection policy of the terminal selecting an ENDC cell;

[0032] a transmission module configured to determine a cell to be connected based on the selection policy to perform data transmission.

[0033] In one embodiment, the determining module is further configured to:

[0034] determine the selection policy of the terminal selecting the ENDC cell according to a counting result of the RLF performed for the service, wherein the selection policy at least indicates a rule of the terminal selecting a first type of cell and / or a second type of cell.

[0035] In one embodiment, the determining module is further configured to:

[0036] in response to the counting result indicating that a counting number is greater than or equal to a number threshold, determine that the selection policy of the terminal selecting the ENDC cell is a first selection policy, wherein the first selection policy at least indicates that the first type of cell is prohibited to be selected and the second type of cell is selected;

[0037] or,

[0038] In response to the count quantity indicated by the count result being less than or equal to a quantity threshold, determining that a selection policy of the terminal for selecting an ENDC cell is a second selection policy, wherein the second selection policy at least indicates: selecting the first type of cell and prohibiting selection of the second type of cell.

[0039] In one embodiment, the determining module is further configured to:

[0040] In response to the count result of the RLF meeting a predetermined condition, determining a selection policy of the terminal for selecting an ENDC cell according to a type of the service transmission.

[0041] In one embodiment, the determining module is further configured to:

[0042] In response to the type of the service transmission being data service transmission, determining that the selection policy of the terminal for selecting an ENDC cell is a first selection policy, wherein the first selection policy at least indicates: prohibiting selection of the first type of cell and selecting the second type of cell.

[0043] Alternatively,

[0044] In response to the type of the service transmission being non-data service transmission, determining that the selection policy of the terminal for selecting an ENDC cell is a second selection policy, wherein the second selection policy at least indicates: selecting the first type of cell and prohibiting selection of the second type of cell.

[0045] In one embodiment, the transmission module is configured to:

[0046] In response to determining that the selection policy of the terminal for selecting an ENDC cell is the second selection policy, performing service transmission by using the first selection policy at a predetermined time after performing service transmission based on the second selection policy.

[0047] Alternatively,

[0048] In response to determining that the selection policy of the terminal for selecting an ENDC cell is the second selection policy and that a signal quality of a serving cell of the terminal is less than a signal quality threshold, performing service transmission by using the first selection policy.

[0049] According to a third aspect of the embodiments of the present disclosure, an electronic device is provided, and the electronic device comprises:

[0050] a processor;

[0051] a memory for storing executable instructions of the processor;

[0052] The processor is configured to implement the method in any of the embodiments of the present disclosure when the executable instructions are executed.

[0053] According to a fourth aspect of the embodiments of the present disclosure, a computer storage medium is provided, which stores a computer executable program. The executable program is executed by a processor to implement the method according to any of the embodiments of the present disclosure.

[0054] The technical solutions provided by the embodiments of the present disclosure can have the following beneficial effects.

[0055] In the embodiments of the present disclosure, in response to that a terminal camps on a long term evolution (LTE) base station and a radio link failure (RLF) is caused due to that the terminal does not support a carrier and / or a bandwidth, a selection strategy of the terminal for selecting an ENDC cell is determined according to ongoing service; and a cell to be connected is determined based on the selection strategy, so as to perform data transmission. Here, in response to that the terminal camps on an LTE base station and a RLF is caused due to that the terminal does not support a carrier and a bandwidth, a selection strategy of the terminal for selecting an ENDC cell can be determined according to ongoing service, compared with a mode that only a fixed cell is used to perform service transmission, the selection of the ENDC cell can adapt to the RLF, the occurrence of a network connection failure of the terminal can be reduced, the stability of the network connection of the terminal is improved, and the experience of a user is improved.

[0056] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and are not limiting to the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0057] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and serve to explain the principles of the present disclosure.

[0058] Figure 1 is a flowchart of a cell selection method of a dual connectivity network according to an exemplary embodiment.

[0059] Figure 2 is a flowchart of a cell selection method of a dual connectivity network according to an exemplary embodiment.

[0060] Figure 3 is a flowchart of a cell selection method of a dual connectivity network according to an exemplary embodiment.

[0061] Figure 4 is a flowchart of a cell selection method of a dual connectivity network according to an exemplary embodiment.

[0062] Figure 5 is a flowchart of a cell selection method of a dual connectivity network according to an exemplary embodiment.

[0063] Figure 6is a flowchart of a cell selection method of a dual connectivity network according to an example embodiment.

[0064] Figure 7 is a flowchart of a cell selection method of a dual connectivity network according to an example embodiment.

[0065] Figure 8 is a flowchart of a cell selection method of a dual connectivity network according to an example embodiment.

[0066] Figure 9 is a block diagram of a cell selection apparatus of a dual connectivity network according to an example embodiment.

[0067] Figure 10 is a block diagram of an electronic device according to an example embodiment. DETAILED DESCRIPTION

[0068] The example embodiments will be described in detail below with reference to the drawings. When the description below refers to the drawings, a similar reference in different drawings indicates a similar or identical element. The implementations described in the following example embodiments do not represent all implementations consistent with the present disclosure. Instead, they are merely examples of apparatuses and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0069] To facilitate understanding of those skilled in the art, the disclosure embodiments enumerate a plurality of implementations to clearly describe the technical solutions of the disclosure embodiments. Of course, those skilled in the art can understand that the plurality of embodiments provided by the disclosure embodiments can be executed alone, or can be executed together with the methods of other embodiments of the disclosure embodiments, or can be executed alone or together with some methods in other related technologies; the disclosure embodiments do not make any limitation in this regard.

[0070] To facilitate understanding of any embodiment of the disclosure, first, the application scenarios of ENDC are described:

[0071] In the early stage of 5G network construction, due to actual problems such as technical ability and equipment cost, a non-standalone network mode is temporarily used to set up a 5G network. The non-standalone network mode can also be referred to as ENDC. The purpose of introducing ENDC technology is that the 4G frequency band is relatively low, the construction time is long, a relatively mature wide coverage network is formed, and good mobility is achieved. The 5G frequency band is relatively high, and the cell coverage bandwidth is small in a wide range, focusing on solving the high throughput problem in hot spot areas. Therefore, according to the traffic demand, the construction can be carried out, and through the ENDC technology, the control plane of the 4G network is used to improve the coverage and solve the mobility problem of the 5G network, which is more conducive to meeting the capacity demand and coverage requirement of users.

[0072] As shown in the embodiment, a cell selection method of a dual connectivity network is provided, the method is executed by a terminal, and the method comprises the following steps: Figure 1

[0073] Step 11, in response to that the terminal camps on a long term evolution (LTE) base station and a radio link failure (RLF) is caused due to that the terminal does not support a carrier and / or a bandwidth, a selection strategy of the terminal selecting an evolved node base station (eNB) and a new radio (NR) base station dual connectivity (ENDC) cell is determined according to a service in progress.

[0074] Step 12, a cell to be connected is determined based on the selection strategy to perform data transmission.

[0075] Here, the terminal can be, but is not limited to, a mobile phone, a tablet computer, a wearable device, a vehicle-mounted terminal, a road side unit (RSU), a smart home terminal, an industrial sensor device, a medical device, and the like. For example, the smart home terminal can include a camera, a temperature acquisition device, a brightness acquisition device, and the like.

[0076] Here, the base station involved in the present disclosure can be various types of base stations, such as a base station of a third generation (3G) mobile communication network, a base station of a fourth generation (4G) mobile communication network, a base station of a fifth generation (5G) mobile communication network, or other evolved node base stations.

[0077] In one embodiment, in response to that the terminal camps on a long term evolution (LTE) base station supporting evolved node base station (eNB) and new radio (NR) base station dual connectivity (ENDC) and carrier aggregation (CA), and a radio link failure (RLF) is caused due to that the terminal does not support a combination of an LTE single carrier and a NR bandwidth under ENDC, a selection strategy of the terminal selecting an ENDC cell is determined according to a service in progress.

[0078] ​In one embodiment, after a terminal camps on a Long Term Evolution (LTE) base station supporting dual connectivity (ENDC) and carrier aggregation (CA) with both an Evolved Base Station and a New Radio Base Station (NR Base Station), the terminal may report capability information to the base station. This capability information includes at least one of the following: frequency band information, network standard information, carrier aggregation information, and whether ENDC is supported. Upon receiving the capability information, the base station sends configuration parameters to the terminal, wherein the configuration parameters at least indicate carriers and / or bandwidths that the terminal does not support. When the terminal adapts to the carrier and / or bandwidth, if it is determined that the adapted carrier and bandwidth are carriers and / or bandwidths that the terminal does not support as indicated by the configuration parameters, then a radio link failure is determined. Here, the carrier is an LTE single carrier, and the bandwidth is the NR bandwidth under ENDC. The terminal's ENDC cell selection strategy may be determined based on the service type of the ongoing service. Alternatively, the terminal's ENDC cell selection strategy may be determined based on parameters associated with the ongoing service. Here, the service-associated parameters may be parameters related to radio link failures, such as the number of radio link failures.

[0079] Here, the selection strategy can be a rule for choosing which type of cell to use for data transmission. For example, it could be a rule for choosing between a first-class cell and a second-class cell, where the first-class cell could be an LTE cell and the second-class cell could be a 5G cell. The wireless communication quality of the second-class cell is superior to that of the first-class cell.

[0080] In this embodiment of the disclosure, in response to a Long Term Evolution (LTE) base station where the terminal is camped and a Radio Link Failure (RLF) occurs due to the terminal's lack of carrier and bandwidth support, a selection strategy for the terminal to choose an Endpoint Cell (ENDC) is determined based on the ongoing service. Based on this selection strategy, a cell to be connected to is determined for data transmission. Here, when the terminal is camped on an LTE-enabled base station and an RLF occurs due to the terminal's lack of carrier and bandwidth support, the selection strategy for the terminal to choose an ENDC cell can be determined based on the ongoing service. Compared to a method that can only use a fixed cell for service transmission, the selection of an ENDC cell can adapt to RLF, reducing the occurrence of terminal network connection failures, improving the stability of the terminal network connection, and thus enhancing the user experience.

[0081] It should be noted that those skilled in the art will understand that the methods provided in the embodiments of this disclosure can be executed alone or together with some methods in the embodiments of this disclosure or some methods in related technologies.

[0082] like Figure 2 As shown, this embodiment provides a cell selection method for a dual-connectivity network. The method is executed by a terminal and includes:

[0083] Step 21, determining a selection policy of the terminal selecting the ENDC cell according to the counting result of the RLF of performing the service, wherein the selection policy at least indicates a rule of the terminal selecting the first type of cell and / or the second type of cell; and the wireless communication quality of the second type of cell is superior to the wireless communication quality of the first type of cell.

[0084] In one embodiment, as described in the foregoing steps, after the terminal receives the configuration parameter sent by the network, a counter is started, wherein the counter is counted once each time the wireless link fails. Here, the counting value of the counter is the counting result. In one embodiment, the terminal periodically determines the counting result according to a predetermined period. The predetermined period can be determined according to the quality of the wireless communication environment. In one embodiment, in response to the quality of the wireless communication environment being greater than or equal to a quality threshold of the wireless communication environment, it is determined that the predetermined period is greater than a period threshold. Alternatively, in response to the quality of the wireless communication environment being less than or equal to the quality threshold of the wireless communication environment, it is determined that the predetermined period is less than the period threshold. In this way, the predetermined period can be adapted to the quality of the wireless communication environment.

[0085] Here, the predetermined condition can be stored in the terminal in advance, and the condition of meeting the predetermined condition can be that the counting value indicated by the counting result is within a value range.

[0086] In one embodiment, the counting result of the RLF is determined; and according to whether the counting value indicated by the counting result is within a value range, a selection policy of the terminal selecting the ENDC cell is determined, wherein the selection policy at least indicates a rule of the terminal selecting the first type of cell and / or the second type of cell; and the service is transmitted based on the cell determined according to the selection policy. Here, the first type of cell can be an LTE cell, and the second type of cell can be a 5G cell.

[0087] In one embodiment, in response to the counting value indicated by the counting result being within the value range, it is determined that the selection policy of the terminal selecting the ENDC cell is a first selection policy, wherein the first selection policy at least indicates that the first type of cell is prohibited to be selected and the second type of cell is selected. Alternatively, in response to the counting value indicated by the counting result being outside the value range, it is determined that the selection policy of the terminal selecting the ENDC cell is a second selection policy, wherein the second selection policy at least indicates that the first type of cell is selected and the second type of cell is prohibited to be selected. Here, the value range can be determined according to a required wireless quality. In one embodiment, when the required wireless quality is greater than a quality threshold, the value range can be a first range; and when the required wireless quality is less than the quality threshold, the value range can be a second range. For example, the first range can be a range less than or equal to a, and the second range can be a range less than or equal to b. Wherein a is less than b.

[0088] In one embodiment, in response to the count number indicated by the counting result being greater than or equal to a number threshold, a selection policy for the terminal to select an ENDC cell is determined as a first selection policy, wherein the first selection policy at least indicates: to prohibit selection of the first type of cell and to select the second type of cell.

[0089] In one embodiment, in response to the count number indicated by the counting result being less than or equal to a number threshold, a selection policy for the terminal to select an ENDC cell is determined as a second selection policy, wherein the second selection policy at least indicates: to select the first type of cell and to prohibit selection of the second type of cell. Here, the number threshold can be determined according to a required radio quality. In one embodiment, when the required radio quality is greater than a quality threshold, the number threshold can be a value c, and when the required radio quality is less than the quality threshold, the number threshold can be a value d. Here, the value c is less than the value d.

[0090] In one embodiment, in response to the counting result meeting a predetermined condition, a selection policy for the terminal to select an ENDC cell is determined according to a type of the service transmission. In one embodiment, in response to the counting result meeting the predetermined condition and the type of the service transmission being a data service transmission, a selection policy for the terminal to select an ENDC cell is determined as a first selection policy, wherein the first selection policy at least indicates: to prohibit selection of the first type of cell and to select the second type of cell. In another embodiment, in response to the counting result meeting the predetermined condition and the type of the service transmission being a non-data service transmission, a selection policy for the terminal to select an ENDC cell is determined as a second selection policy, wherein the second selection policy at least indicates: to select the first type of cell and to prohibit selection of the second type of cell.

[0091] In one embodiment, in response to determining that the selection policy for the terminal to select an ENDC cell is the second selection policy, service transmission is performed using the first selection policy at a predetermined time after service transmission based on the second selection policy. Here, the predetermined time can be determined according to a quality of a radio communication environment. In one embodiment, in response to the quality of the radio communication environment being greater than or equal to a quality threshold of the radio communication environment, the predetermined time is determined to be less than a time threshold. Alternatively, in response to the quality of the radio communication environment being less than or equal to the quality threshold of the radio communication environment, the predetermined time is determined to be greater than the time threshold. In this way, the predetermined time can be adapted to the quality of the radio communication environment. Here, a timer can be started when service transmission is performed using the second selection policy, and a duration of the timer is a duration corresponding to the predetermined time.

[0092] In another embodiment, in response to determining that the selection policy of the terminal for selecting the ENDC cell is the second selection policy and the signal quality of the serving cell of the terminal is less than the signal quality threshold, the first selection policy is used for service transmission. In this way, when the signal quality of the serving cell of the terminal is less than the signal quality threshold, the switching of the cell can be performed in time.

[0093] It should be noted that those skilled in the art can understand that the method provided by the embodiments of the present disclosure can be executed alone or together with some methods in some methods or related technologies in the embodiments of the present disclosure.

[0094] As shown in Figure 3 In the embodiments, a cell selection method for a dual connectivity network is provided, the method is executed by a terminal, and the method comprises the following steps:

[0095] Step 31, in response to each time determining that the terminal causes RLF due to not supporting the combination of the LTE single carrier and / or the new radio (NR) bandwidth under ENDC, the counting result is increased by a predetermined value.

[0096] When the terminal adapts the carrier and / or the bandwidth, if it is determined that the adapted carrier and bandwidth are carriers and bandwidths that the terminal does not support as indicated by the configuration parameters, it is determined that the radio link fails. Here, the carrier is the LTE single carrier, and the bandwidth is the NR bandwidth under ENDC.

[0097] Here, the number of RLFs can be counted by using a counter. The initial value of the counter can be 0. The predetermined value can be 1. That is, each time it is determined that the terminal causes one RLF due to not supporting the combination of the LTE single carrier and the NR bandwidth under ENDC, the counting value of the counter is increased by 1.

[0098] It should be noted that those skilled in the art can understand that the method provided by the embodiments of the present disclosure can be executed alone or together with some methods in some methods or related technologies in the embodiments of the present disclosure.

[0099] As shown in Figure 4 In the embodiments, a cell selection method for a dual connectivity network is provided, the method is executed by a terminal, and the method comprises the following steps:

[0100] Step 41, in response to the counting number indicated by the counting result being greater than or equal to the number threshold, it is determined that the selection policy of the terminal for selecting the ENDC cell is the first selection policy, wherein the first selection policy at least indicates that the first type of cell is prohibited to be selected and the second type of cell is preferentially selected.

[0101] In one embodiment, after the terminal receives the configuration parameters sent by the network, a counter is started, wherein the counter is counted once each time a radio link failure occurs. Here, the count value of the counter is the count result. The count result of the radio link failure RLF is determined. In response to the count quantity indicated by the count result being greater than or equal to a quantity threshold, it is determined that the selection strategy of the terminal for selecting an E-DC cell is a first selection strategy, wherein the first selection strategy at least indicates: to prohibit selecting a first type of cell and to select a second type of cell. The cell determined based on the selection strategy is used for service transmission.

[0102] Alternatively, step 41 can be:

[0103] In response to the count quantity indicated by the count result being less than or equal to a quantity threshold, it is determined that the selection strategy of the terminal for selecting an E-DC cell is a second selection strategy, wherein the second selection strategy at least indicates: to select a first type of cell and to prohibit selecting a second type of cell.

[0104] In one embodiment, after the terminal receives the configuration parameters sent by the network, a counter is started, wherein the counter is counted once each time a radio link failure occurs. Here, the count value of the counter is the count result. The count result of the radio link failure RLF is determined. In response to the count quantity indicated by the count result being less than or equal to a quantity threshold, it is determined that the selection strategy of the terminal for selecting an E-DC cell is a second selection strategy, wherein the second selection strategy at least indicates: to select a first type of cell and to prohibit selecting a second type of cell. The cell determined based on the selection strategy is used for service transmission.

[0105] It should be noted that those skilled in the art can understand that the method provided by the embodiments of the present disclosure can be executed alone or together with some methods in some methods or related technologies in the embodiments of the present disclosure.

[0106] As shown in Figure 5 , the embodiments provide a cell selection method for a dual connectivity network, which is executed by a terminal and includes:

[0107] Step 51, in response to the count result of the RLF meeting a predetermined condition, determining a selection strategy of the terminal for selecting an E-DC cell according to the type of the service transmission.

[0108] In one embodiment, in response to the counting result meeting the predetermined condition, a selection policy of the terminal selecting the ENDC cell is determined according to a type of the service transmission. In one embodiment, in response to the counting result meeting the predetermined condition and the type of the service transmission being data service transmission, the selection policy of the terminal selecting the ENDC cell is determined as a first selection policy, wherein the first selection policy at least indicates: selecting the second type of cell and prohibiting selecting the first type of cell. In another embodiment, in response to the counting result meeting the predetermined condition and the type of the service transmission being non-data service transmission, the selection policy of the terminal selecting the ENDC cell is determined as a second selection policy, wherein the second selection policy at least indicates: selecting the first type of cell and prohibiting selecting the second type of cell.

[0109] It should be noted that the method provided by the embodiments of the present disclosure can be executed alone or together with some methods in some methods or related technologies in the embodiments of the present disclosure.

[0110] As shown in FIG. 6, the embodiments provide a method for cell selection in a dual connectivity network, the method is executed by a terminal, and the method comprises the following steps: Figure 6 As shown in FIG. 6, the embodiments provide a method for cell selection in a dual connectivity network, the method is executed by a terminal, and the method comprises the following steps:

[0111] In one embodiment, in response to the counting result meeting the predetermined condition, a selection policy of the terminal selecting the ENDC cell is determined according to a type of the service transmission. In one embodiment, in response to the counting result meeting the predetermined condition and the type of the service transmission being data service transmission, the selection policy of the terminal selecting the ENDC cell is determined as a first selection policy, wherein the first selection policy at least indicates: selecting the second type of cell and prohibiting selecting the first type of cell. In another embodiment, in response to the counting result meeting the predetermined condition and the type of the service transmission being non-data service transmission, the selection policy of the terminal selecting the ENDC cell is determined as a second selection policy, wherein the second selection policy at least indicates: selecting the first type of cell and prohibiting selecting the second type of cell.

[0112] Here, the data service transmission can be transmission of data of at least one of the following: video data and voice data.

[0113] In one embodiment, in response to the counting result meeting the predetermined condition, a selection policy of the terminal selecting the ENDC cell is determined according to a type of the service transmission. In one embodiment, in response to the counting result meeting the predetermined condition and the type of the service transmission being data service transmission, the selection policy of the terminal selecting the ENDC cell is determined as a first selection policy, wherein the first selection policy at least indicates: selecting the second type of cell and prohibiting selecting the first type of cell. In another embodiment, in response to the counting result meeting the predetermined condition and the type of the service transmission being non-data service transmission, the selection policy of the terminal selecting the ENDC cell is determined as a second selection policy, wherein the second selection policy at least indicates: selecting the first type of cell and prohibiting selecting the second type of cell.

[0114] Alternatively, step 61 can be:

[0115] In response to the type of the service transmission being non-data service transmission, the selection policy of the terminal selecting the ENDC cell is determined as a second selection policy, wherein the second selection policy at least indicates: selecting the first type of cell and prohibiting selecting the second type of cell.

[0116] In one embodiment, in response to the counting result meeting a predetermined condition, a selection strategy for the terminal to select an ENDC cell is determined based on the type of service transmission. In another embodiment, in response to the counting result meeting the predetermined condition and the type of service transmission being data service transmission, the selection strategy for the terminal to select an ENDC cell is determined to be a first selection strategy, wherein the first selection strategy at least indicates: prohibiting the selection of a first-type cell and selecting a second-type cell. Here, the counting result meeting the predetermined condition may be that the number of RLFs is greater than or equal to a number threshold.

[0117] It should be noted that, in response to the counting result not meeting predetermined conditions, a selection strategy for the terminal to select an ENDC cell is determined based on the type of service transmission. In one embodiment, in response to the counting result not meeting predetermined conditions and the type of service transmission being non-data service transmission, the selection strategy for the terminal to select an ENDC cell is determined to be a second selection strategy, wherein the second selection strategy at least indicates: selecting a first-type cell and prohibiting the selection of a second-type cell. Here, the counting result not meeting predetermined conditions may mean that the number of RLFs is less than or equal to a number threshold.

[0118] In response to the counting result not meeting predetermined conditions, a selection strategy for the terminal to select an ENDC cell is determined based on the type of service transmission. In one embodiment, in response to the counting result not meeting predetermined conditions and the type of service transmission being data service transmission, the selection strategy for the terminal to select an ENDC cell is determined to be a second selection strategy, wherein the second selection strategy at least indicates: selecting a first-type cell and prohibiting the selection of a second-type cell. Here, the counting result not meeting predetermined conditions may mean that the number of RLFs is less than or equal to a number threshold.

[0119] It should be noted that those skilled in the art will understand that the methods provided in the embodiments of this disclosure can be executed alone or together with some methods in the embodiments of this disclosure or some methods in related technologies.

[0120] like Figure 7 As shown, this embodiment provides a cell selection method for a dual-connectivity network. The method is executed by a terminal and includes:

[0121] Step 71: In response to determining that the terminal selects the ENDC cell selection strategy as the second selection strategy, after a predetermined time has elapsed following service transmission based on the second selection strategy, service transmission is performed using the first selection strategy.

[0122] In one embodiment, in response to determining that the selection policy of the terminal for selecting the ENDC cell is the second selection policy, the first selection policy is used for service transmission at a predetermined time after service transmission based on the second selection policy. Here, the predetermined time can be determined according to the quality of the wireless communication environment. In one embodiment, in response to the quality of the wireless communication environment being greater than or equal to a quality threshold of the wireless communication environment, the predetermined time is determined to be less than a time threshold. Alternatively, in response to the quality of the wireless communication environment being less than or equal to the quality threshold of the wireless communication environment, the predetermined time is determined to be greater than the time threshold. In this way, the predetermined time can be adapted to the quality of the wireless communication environment. Here, a timer can be started when service transmission is performed using the second terminal measurement, and the duration of the timer is the duration corresponding to the predetermined time.

[0123] Alternatively, step 71 can be:

[0124] In response to determining that the selection policy of the terminal for selecting the ENDC cell is the second selection policy and the signal quality of the serving cell of the terminal is less than a signal quality threshold, the first selection policy is used for service transmission.

[0125] In one embodiment, in response to determining that the selection policy of the terminal for selecting the ENDC cell is the second selection policy and the signal quality of the serving cell of the terminal is less than a signal quality threshold, the first selection policy is used for service transmission. In this way, when the signal quality of the serving cell of the terminal is less than the signal quality threshold, the switching of the cell can be performed in time.

[0126] It should be noted that those skilled in the art can understand that the method provided by the embodiments of the present disclosure can be executed alone or together with some methods in some methods or related technologies in the embodiments of the present disclosure.

[0127] In one embodiment, the method further comprises:

[0128] In response to the terminal selecting the first type of cell, a first identifier indicating the first type of cell is displayed;

[0129] Alternatively,

[0130] In response to the terminal selecting the second type of cell, a second identifier indicating the second type of cell is displayed.

[0131] In one embodiment, the terminal switches from the first type of cell to the second type of cell, and the displayed first identifier switches to the second identifier.

[0132] In one embodiment, the terminal switches from the second type of cell to the first type of cell, and the displayed second identifier is switched to the first identifier. It should be noted that in the embodiments of the present disclosure, the forms of the first identifier and the second identifier are not limited, for example, the first identifier and the second identifier can be identifiers of corresponding cells, such as 4G identifiers, or the user can be prompted that the cell is switched by outputting corresponding prompt information on the terminal screen.

[0133] In order to better understand the embodiments of the present disclosure, the technical solutions of the present disclosure are further described through an example as follows:

[0134] Example 1

[0135] Please refer to Figure 8 In the embodiments, a cell selection method for a dual connectivity network is provided, the method is executed by a terminal, and the method comprises the following steps.

[0136] In step 81, the base station sends configuration parameters to the terminal, wherein the configuration parameters at least indicate carriers and / or bandwidths that are not supported by the terminal. Before the base station sends the configuration parameters to the terminal, the terminal reports capability information to the base station, wherein the capability information comprises at least one of the following information: frequency band information, system type information, carrier aggregation information, and information about whether the terminal supports ENDC.

[0137] In step 82, after the terminal receives the configuration parameters sent by the network, a counter is started, wherein the counter is counted once each time a radio link failure occurs.

[0138] In step 83, it is determined whether the adapted carriers and bandwidths are the same as the carriers and bandwidths that are not supported by the terminal indicated by the configuration parameters. When the terminal adapts the carriers and / or bandwidths, if it is determined that the adapted carriers and bandwidths are the carriers and bandwidths that are not supported by the terminal indicated by the configuration parameters, it is determined that a radio link failure occurs, and step 84 is performed; otherwise, step 85 is performed.

[0139] In step 84, the counter is incremented by one, and step 85 is performed.

[0140] In step 85, it is determined whether the count value of the counter is greater than 5. If the count value is less than 5, step 83 is performed, otherwise, step 86 is performed.

[0141] In step 86, it is determined whether the service is a data transmission service. If yes, step 87 is performed, otherwise, step 88 is performed.

[0142] In step 87, the first type of cell is disabled, the second type of cell is used for service transmission, and a timer is started, wherein the duration of the timer is 5 minutes; and step 89 is performed.

[0143] Step 88, disable the second type of cell and use the first type of cell for service transmission, and start a timer, wherein the duration of the timer is 5 minutes; perform step 89.

[0144] Step 89, determine whether the predetermined time arrives, if yes, perform step 90; if no, perform step 86.

[0145] Step 90, use the first type of cell for service transmission and disable the use of the second type of cell for service transmission.

[0146] It should be noted that those skilled in the art can understand that the method provided by the embodiments of the present disclosure can be executed alone or together with some methods in the embodiments of the present disclosure or some methods in related technologies.

[0147] Please refer to Figure 9 The embodiments of the present disclosure provide a cell selection device for a dual connectivity network, the device comprises:

[0148] The determining module 91 is configured to: in response to that the terminal camps on a long term evolution (LTE) base station and a radio link failure (RLF) is caused due to that the terminal does not support a carrier and a bandwidth, determine a selection strategy of the terminal selecting an evolved node B (eNB) dual connectivity (ENDC) cell according to a service being performed.

[0149] The transmission module 92 is configured to determine a cell to be connected based on the selection strategy to perform data transmission.

[0150] In one embodiment, the determining module 91 is further configured to:

[0151] determine the selection strategy of the terminal selecting the ENDC cell according to a counting result of the RLF being performed, wherein the selection strategy at least indicates: a rule of the terminal selecting a first type of cell and / or a second type of cell; and a radio communication quality of the second type of cell is better than a radio communication quality of the first type of cell.

[0152] In one embodiment, the device further comprises:

[0153] The counting module 93 is configured to: in response to that the terminal determines that a combination of a single carrier of the LTE and / or a new radio (NR) bandwidth under the ENDC does not support each time and causes the RLF, increase the counting result by a predetermined value.

[0154] In one embodiment, the determining module 91 is further configured to:

[0155] in response to that the counting result indicates that a counting number is greater than or equal to a number threshold value, determine that the selection strategy of the terminal selecting the ENDC cell is a first selection strategy, wherein the first selection strategy at least indicates: to disable the selection of the first type of cell and select the second type of cell.

[0156] or,

[0157] in response to the count quantity indicated by the count result being less than or equal to a quantity threshold, determining a selection policy for the terminal to select an ENDC cell as a second selection policy, wherein the second selection policy at least indicates: selecting a first type of cell and prohibiting selection of a second type of cell.

[0158] In one embodiment, the determining module 91 is further configured to:

[0159] in response to the count result of the RLF meeting a predetermined condition, determining a selection policy for the terminal to select an ENDC cell according to a type of the service transmission.

[0160] In one embodiment, the determining module 91 is further configured to:

[0161] in response to the type of the service transmission being data service transmission, determining a selection policy for the terminal to select an ENDC cell as a first selection policy, wherein the first selection policy at least indicates: prohibiting selection of a first type of cell and selecting a second type of cell;

[0162] or,

[0163] in response to the type of the service transmission being non-data service transmission, determining a selection policy for the terminal to select an ENDC cell as a second selection policy, wherein the second selection policy at least indicates: selecting a first type of cell and prohibiting selection of a second type of cell; the wireless communication quality of the second type of cell is better than that of the first type of cell.

[0164] In one embodiment, the transmission module 92 is configured to:

[0165] in response to determining that the selection policy for the terminal to select an ENDC cell is the second selection policy, performing service transmission using the first selection policy at a predetermined time after service transmission based on the second selection policy;

[0166] or,

[0167] in response to determining that the selection policy for the terminal to select an ENDC cell is the second selection policy and the signal quality of a serving cell of the terminal is less than a signal quality threshold, performing service transmission using the first selection policy.

[0168] As to the apparatus in the above embodiments, the specific manners in which various modules perform operations have been described in details in the embodiments of the method, and thus will not be described in details here.

[0169] The embodiments of the present disclosure further provide a communication device, comprising:

[0170] antenna;

[0171] Memory;

[0172] The processor, connected to both the antenna and the memory, is used to control the antenna to transmit and receive wireless signals by executing an executable program stored in the memory, and is capable of performing the steps of the wireless network access method provided in any of the foregoing embodiments.

[0173] The communication device provided in this embodiment can be the aforementioned terminal or base station. The terminal can be various human-mounted or vehicle-mounted terminals. The base station can be various types of base stations, such as 4G base stations or 5G base stations.

[0174] The antenna can be any type of antenna, such as a 3G antenna, a 4G antenna, or a 5G antenna, or other mobile antennas; the antenna may also include WiFi antennas or wireless charging antennas, etc.

[0175] The memory can include various types of storage media, which are non-transitory computer storage media that can continue to store information after the communication device loses power.

[0176] The processor can be connected to the antenna and memory via a bus or the like, for reading executable programs stored in the memory, such as at least one of the methods shown in any embodiment of this disclosure.

[0177] This disclosure also provides a non-transitory computer-readable storage medium storing an executable program, wherein when the executable program is executed by a processor, it implements the steps of the wireless network access method provided in any of the foregoing embodiments, such as at least one of the methods shown in any embodiment of this disclosure.

[0178] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0179] Figure 10 This is a block diagram illustrating an electronic device 600 according to an exemplary embodiment. For example, the electronic device 600 may be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0180] Reference Figure 10 The electronic device 600 may include one or more of the following components: a processing component 602, a memory 604, a power supply component 606, a multimedia component 608, an audio component 610, an input / output (I / O) interface 612, a sensor component 614, and a communication component 616.

[0181] The processing component 602 generally controls the overall operations of the electronic device 600, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 602 can include one or more processors 820 to execute instructions to complete the steps of the methods described above, in whole or in part. Moreover, the processing component 602 can include one or more modules to facilitate the interaction between the processing component 602 and other components. For example, the processing component 602 can include a multimedia module to facilitate the interaction between the multimedia component 608 and the processing component 602.

[0182] The memory 604 is configured to store various types of data to support operations of the electronic device 600. Examples of these data include instructions to operate any applications or methods on the electronic device 600, contact data, phonebook data, messages, pictures, videos, and the like. The memory 604 can be realized by any type of volatile or non-volatile storage devices, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic or optical disk.

[0183] The power component 606 provides power to the various components of the electronic device 600. The power component 606 can include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 600.

[0184] The multimedia component 608 includes a screen to provide an output interface between the electronic device 600 and a user. In some embodiments, the screen can include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes the touch panel, the screen can be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense a touch, a slide, and a gesture on the touch panel. The touch sensors can not only sense a boundary of a touching or sliding action, but also detect duration and pressure related to the touching or sliding action. In some embodiments, the multimedia component 608 includes a front camera and / or a rear camera. The front camera and / or the rear camera can receive external multimedia data when the device 600 is in an operating mode, such as a shooting mode or a video mode. Each of the front camera and the rear camera can be a fixed optical lens system or have a focal length and optical zoom capability.

[0185] The audio component 610 is configured to output and / or input audio signals. For example, the audio component 610 includes a microphone (MIC) that is configured to receive an external audio signal when the electronic device 600 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal can be further stored in the memory 604 or transmitted via the communication component 616. In some embodiments, the audio component 610 also includes a speaker for outputting audio signals.

[0186] The I / O interface 612 provides an interface between the processing component 602 and peripheral interface modules, which can be a keypad, a click wheel, buttons, and the like. The buttons can include, but are not limited to, a home button, a volume button, a start button, and a lock button.

[0187] The sensor component 614 includes one or more sensors for providing status assessments of various aspects of the electronic device 600. For example, the sensor component 614 can detect an open / closed position of the device 600, relative positioning of components, such as a display and a keypad of the electronic device 600, a change of position of the electronic device 600 or a component of the electronic device 600, presence or absence of user contact with the electronic device 600, the orientation or acceleration / deceleration of the electronic device 600, and a temperature change of the electronic device 600. The sensor component 614 can include a proximity sensor configured to detect presence of a nearby object without any physical touch. The sensor component 614 can further include a light sensor, such as a CMOS or CCD image sensor, for use in an imaging application. In some embodiments, the sensor component 614 can further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0188] The communication component 616 is configured to facilitate wired or wireless communication between the electronic device 600 and other devices. The electronic device 600 can access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an example embodiment, the communication component 616 receives broadcast signals or broadcast-related information from an external broadcasting management system via a broadcast channel. In an example embodiment, the communication component 616 further includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technology.

[0189] In an exemplary embodiment, the electronic device 600 can be implemented with one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic elements for performing the above-described methods.

[0190] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions, such as the memory 604 including instructions, is also provided, which can be executed by the processor 820 of the electronic device 600 to accomplish the above-described methods. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disc, and an optical data storage device, etc.

[0191] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the present application cover any and all variations of the application that come within the scope of the present application, along with all of the equivalents thereof. It is intended that the specification and examples be considered exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0192] It is to be understood that the application is not limited to the precise construction herein described and as shown in the attached drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the present application. The scope of the application is to be determined only by the appended claims.

Claims

1. A cell selection method for a dual-connectivity network, characterized in that, The method is executed by a terminal, and the method includes: In response to a terminal camped on a Long Term Evolution (LTE) base station and a Radio Link Failure (RLF) caused by the terminal not supporting the carrier and / or bandwidth, the terminal determines a selection strategy for choosing an Evolved Base Station and a New Radio Base Station Dual-Connection (ENDC) cell based on the services being performed. The selection strategy is used to determine the cells to be connected for data transmission. The step of determining the ENDC cell selection strategy for the terminal based on the ongoing service includes: Based on the counting results of the RLF for the service, the selection strategy for the terminal to select the ENDC cell is determined, wherein the selection strategy indicates at least: the rules for the terminal to select a first type of cell and / or a second type of cell; the wireless communication quality of the second type of cell is better than that of the first type of cell; In response to each determination that the terminal causes an RLF due to not supporting the combination of LTE single carrier and / or NR bandwidth under ENDC, the counting result is increased by a predetermined value.

2. The method according to claim 1, characterized in that, The step of determining the selection strategy for the terminal to select the ENDC cell based on the counting result of the RLF for the service includes: In response to the count result indicating that the count number is greater than or equal to the count threshold, the terminal selects the ENDC cell selection strategy as the first selection strategy, wherein the first selection strategy indicates at least: prohibiting the selection of the first type of cell and selecting the second type of cell; or, In response to the count result indicating that the count number is less than or equal to the count threshold, the terminal selects the ENDC cell selection strategy as the second selection strategy, wherein the second selection strategy indicates at least: selecting the first type of cell and prohibiting the selection of the second type of cell.

3. The method according to claim 1, characterized in that, The step of determining the ENDC cell selection strategy for the terminal based on the ongoing service includes: In response to the RLF counting result meeting predetermined conditions, the terminal selects the ENDC cell selection strategy based on the type of service transmission.

4. The method according to claim 3, characterized in that, The step of determining the terminal's selection strategy for the ENDC cell based on the type of service transmission includes: In response to the fact that the type of the service transmission is data service transmission, the terminal selects the ENDC cell selection strategy as the first selection strategy, wherein the first selection strategy at least indicates: prohibiting the selection of the first type of cell and selecting the second type of cell; or, In response to the fact that the type of the service transmission is non-data service transmission, the terminal selects the ENDC cell using a second selection strategy, wherein the second selection strategy indicates at least: selecting a first-type cell and prohibiting the selection of a second-type cell; and the wireless communication quality of the second-type cell is better than that of the first-type cell.

5. The method according to claim 2 or 4, characterized in that, The method further includes: In response to determining that the terminal selects the ENDC cell selection strategy as the second selection strategy, after a predetermined time has elapsed following service transmission based on the second selection strategy, service transmission is performed using the first selection strategy. or, In response to determining that the terminal selects the second selection strategy for the ENDC cell and that the signal quality of the terminal's serving cell is less than the signal quality threshold, the first selection strategy is used for service transmission.

6. The method according to claim 2 or 4, characterized in that, The method further includes: In response to the terminal selecting the first type of cell, a first identifier indicating the first type of cell is displayed; or, In response to the terminal selecting the second type of cell, a second identifier indicating the second type of cell is displayed.

7. A cell selection device for a dual-connectivity network, characterized in that, The device includes: The determination module is configured to: in response to a terminal camped on a Long Term Evolution (LTE) base station and a Radio Link Failure (RLF) caused by the terminal not supporting the carrier and / or bandwidth, determine the selection strategy for the terminal to select an ENDC cell based on the service being performed; The transmission module is used to determine the cell to be connected based on the selection strategy in order to perform data transmission; The determining module is further configured to: Based on the counting results of the RLF for the service, the selection strategy for the terminal to select the ENDC cell is determined, wherein the selection strategy indicates at least: the rules for the terminal to select a first type of cell and / or a second type of cell; the wireless communication quality of the second type of cell is better than that of the first type of cell; The device further includes: A counting module is configured to increment the counting result by a predetermined value each time it is determined that the terminal causes an RLF due to a combination of not supporting LTE single carrier and / or NR bandwidth under ENDC.

8. The apparatus according to claim 7, characterized in that, The determining module is further configured to: In response to the count result indicating that the count number is greater than or equal to the count threshold, the terminal selects the ENDC cell selection strategy as the first selection strategy, wherein the first selection strategy indicates at least: prohibiting the selection of the first type of cell and selecting the second type of cell; or, In response to the count result indicating that the count number is less than or equal to the count threshold, the terminal selects the ENDC cell selection strategy as the second selection strategy, wherein the second selection strategy indicates at least: selecting the first type of cell and prohibiting the selection of the second type of cell.

9. The apparatus according to claim 7, characterized in that, The determining module is further configured to: In response to the RLF counting result meeting predetermined conditions, the terminal selects the ENDC cell selection strategy based on the type of service transmission.

10. The apparatus according to claim 9, characterized in that, The determining module is further configured to: In response to the fact that the type of the service transmission is data service transmission, the terminal selects the ENDC cell selection strategy as the first selection strategy, wherein the first selection strategy at least indicates: prohibiting the selection of the first type of cell and selecting the second type of cell; or, In response to the fact that the type of the service transmission is non-data service transmission, the terminal selects the ENDC cell selection strategy as the second selection strategy, wherein the second selection strategy at least indicates: selecting the first type of cell and prohibiting the selection of the second type of cell.

11. The apparatus according to claim 8 or 10, characterized in that, The transmission module is used for: In response to determining that the terminal selects the ENDC cell selection strategy as the second selection strategy, after a predetermined time has elapsed following service transmission based on the second selection strategy, service transmission is performed using the first selection strategy. or, In response to determining that the terminal selects the second selection strategy for the ENDC cell and that the signal quality of the terminal's serving cell is less than the signal quality threshold, the first selection strategy is used for service transmission.

12. A communication device, characterized in that, include: Memory; A processor, connected to the memory, is configured to execute computer-executable instructions stored in the memory and to implement the method of any one of claims 1 to 6.

13. A computer storage medium, characterized in that, The computer storage medium stores computer-executable instructions, which, when executed by a processor, can implement the method described in any one of claims 1 to 6.

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