Frequency priority determination method and apparatus, communication device, and medium

Abstract

The present application relates to the technical field of communications, and provides a frequency priority determination method and apparatus, a communication device, and a medium. The frequency priority determination method comprises: determining the priority of a candidate frequency on the basis of a frequency supporting an MBS service and / or a service area of the MBS service. In the technical solution, whether the MBS service is supported and / or the service area of the MBS service are considered to determine the priority of the candidate frequency, so that a high priority can be determined for the candidate frequency capable of improving the reliability of the MBS service, thereby improving the reliability of the MBS service.

Description

Frequency priority determination method and apparatus, communication device, and medium TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of communication technology, and in particular to a frequency priority determination method and apparatus, a communication device, and a medium. BACKGROUND

[0002] Although 5G has already been commercially used, it cannot guarantee network coverage in the ocean and remote areas on land due to geographical conditions and business models. To break through the terrain restrictions, satellite communication and terrestrial networks are integrated to form a global seamless coverage of air, space, and land integrated stereoscopic network, which has become a research hotspot in the current academic and industrial circles. International organizations such as 3GPP and ITU have also established corresponding working groups to conduct standardization research on satellite-terrestrial integration. Among them, NTN (Non-terrestrial networks) of 3GPP is committed to integrating satellite communication with 5G, solving the key problems of NR (New Radio) supporting NTN, and its standardization work will lay a technical foundation for 6G satellite-terrestrial integration research. In the future, the air, space, and land integrated network mainly focuses on deep integration, combining multiple communication platforms to provide more extensive and diversified communication services.

[0003] The network device in NTN, such as the NGSO (Non-GeoStationary Orbit) satellite in satellite and the LEO (Low Earth Orbit) satellite, has a very large coverage range, which can reach several hundred square kilometers. The services transmitted in different areas within the coverage range can also be different, and different services have their respective service areas.

[0004] In the case that a UE (MBS broadcast capable UE) with MBS service reception capability is receiving or interested in receiving a certain MBS service, if there are multiple available frequencies, a suitable frequency can be selected from them. However, if the selected frequency does not support the MBS service, or in the cell corresponding to the selected frequency, the UE can not be in (or will not be in for a period of time) the service area corresponding to the MBS service, the UE can not receive or receive the MBS service for a period of time, causing the MBS service to be lost or even interrupted.

[0005] In summary, since the selected frequency cannot guarantee that the UE enters the service area as soon as possible after entering the cell, it will cause the loss of service and even interruption in actual application, affecting the reliability of the MBS service. SUMMARY

[0006] In view of the above problem that the selected frequency causes low reliability of the MBS service, the present application provides a frequency priority determination method, device, communication device and medium.

[0007] The embodiment of the present application provides a frequency priority determination method, comprising the following steps:

[0008] The priority of the candidate frequency is determined according to whether the MBS service is supported and / or a service area of the MBS service.

[0009] The embodiment of the present application provides a frequency priority determination device, comprising:

[0010] The priority determination module is configured to determine the priority of the candidate frequency according to whether the MBS service is supported and / or a service area of the MBS service.

[0011] The embodiment of the present application provides a communication device, comprising:

[0012] One or more processors;

[0013] A storage device configured to store one or more programs;

[0014] When the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned frequency priority determination method.

[0015] The embodiment of the present application also provides a computer readable storage medium, which stores a computer program, and the program is executed by a processor to implement the above-mentioned frequency priority determination method or frequency priority determination method.

[0016] The embodiment of the present application provides a frequency priority determination method, device, communication device and medium. The frequency priority determination method comprises determining the priority of the candidate frequency according to whether the MBS service is supported and / or a service area of the MBS service. In the process of determining the priority of the candidate frequency, whether the MBS service is supported and / or the service area of the MBS service is considered, which can determine a higher priority for the candidate frequency that can improve the reliability of the MBS service, thereby improving the reliability of the MBS service. BRIEF DESCRIPTION OF DRAWINGS

[0017] The features, advantages and aspects of the embodiments disclosed herein will become more apparent with reference to the following detailed description and accompanying drawings. Throughout the drawings, the same or similar reference signs represent the same or similar elements. It should be understood that the drawings are schematic, and the original and elements are not necessarily drawn according to the scale.

[0018] Fig. 1 is a schematic diagram of a service area of an MBS service in a cell according to an embodiment of the present application;

[0019] FIG. 2 is a flowchart of a frequency priority determination method according to an embodiment of the present application;

[0020] FIG. 3 is a schematic diagram of a relationship between an MBS service and a cell according to an embodiment of the present application;

[0021] FIG. 4 is a schematic diagram of a service area of an MBS service in a cell according to an embodiment of the present application;

[0022] FIG. 5 is a schematic diagram of a distance between a service area and a UE according to an embodiment of the present application;

[0023] FIG. 6 is a schematic diagram of a frequency priority determination apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] The present application will be further described by examples in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the present application and are not to be used to limit the present application. In addition, it should be noted that only the parts related to the present application are shown in the accompanying drawings for the convenience of description.

[0025] Before the example embodiments are discussed in more detail, it should be mentioned that some of the example embodiments are described as processes or methods depicted as flowcharts. While the steps of the processes are depicted in a sequential order, many of the steps can be performed in parallel, concurrently or at the same time. In addition, the order of the steps can be re-arranged. The processes can be terminated when their operations are completed, but can also have additional steps not included in the figure, which can also be performed after the operations of the processes are completed. The processes can correspond to methods, functions, procedures, subroutines, subprograms, etc.

[0026] It should be noted that the terms "first", "second", and the like in the embodiments of the present application are merely used to distinguish different devices, modules, units or other objects, and do not limit the functions performed by these devices, modules, units or other objects or the mutual dependency therebetween.

[0027] In addition, the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0028] For any Multicast Broadcast Service (MBS), there is a corresponding service area. When a UE is receiving, interested in receiving or will receive a certain MBS service, the UE needs to receive the MBS service in a corresponding cell according to a suitable frequency; if the UE is not in or will not be in the service area corresponding to the MBS service in the cell for a period of time, it will result in MBS service reception failure, packet loss or interruption, affecting the reliability or continuity of the MBS service.

[0029] FIG. 1 is a schematic diagram of service areas of an MBS service in a cell. As shown in FIG. 1, four cells (Cell 1, Cell 2, Cell 3 and Cell 4) correspond to frequencies f1, f2, f3 and f4 respectively, and the shaded parts in Cell 1, Cell 2 and Cell 4 represent service areas of the same MBS service, wherein there are two service areas in Cell 1, which are A1 and A2 respectively, and there is no service area of the MBS service in Cell 3. If the information sent by the sending device indicates that f1, f2 and f3 are frequencies available to the UE, and f4 is not a frequency available to the UE, for example, f4 is not included in the information sent by the sending device, then if the UE needs to receive the MBS service, the UE can receive the MBS service in the area shown by the shaded part in Cell 1 or Cell 2. The way in which the information sent by the sending device indicates that f1, f2 and f3 are frequencies available to the UE includes ① f1, f2 and f3 are included in the system message, and ② the UE has priority information of f1, f2 and f3, so that the UE performs cell reselection evaluation on f1, f2 and f3. Further, the way in which the UE has priority information of f1, f2 and f3 includes sending a system message or dedicated signaling or an RRCRelease message to the UE. The available frequency mentioned herein is a frequency that can be used by the UE for cell reselection evaluation.

[0030] The UE can receive the MBS service according to the available frequencies. Specifically, if according to f3, the UE cannot correctly receive the MBS service in Cell 3; if according to f1, the UE can enter Cell 1 in the direction indicated by the arrow and immediately enter the service area (A2) of the MBS service, and can soon receive the MBS service; if according to f2, the UE can enter Cell 2 in the direction indicated by the arrow, but still needs a period of time to reach the service area of the MBS service, and cannot receive the MBS service during this period of time, and if the MBS service is a service that the UE has been receiving before entering Cell 2, packet loss or interruption of the service will occur. In addition, the UE cannot receive the MBS service according to f4. It can be seen that, due to the lack of sufficient basis for the UE to select a suitable frequency, the MBS service reception fails, packet loss or interruption occurs.

[0031] The present application provides a frequency priority determination method, which aims to determine the priority of a frequency for a UE, to determine which frequency or frequencies have higher priority, and to determine the priority of a frequency according to whether the reliability or continuity of an MBS service can be improved, so that the frequency with higher priority can be used preferentially, and the frequency with lower priority can be used as little as possible in actual application, thereby improving the reliability or continuity of the MBS service.

[0032] The UE in the embodiments of the present application can be referred to as a terminal, which can be a mobile terminal, a vehicle-mounted terminal, etc. The UE includes all devices that provide voice and / or data connectivity to users, such as wireless terminal devices, mobile terminal devices, device-to-device communication (D2D) terminal devices, vehicle-to-everything (V2X) terminal devices, machine-to-machine / Machine-type Communications (M2M / MTC) terminal devices, Internet of Things (IoT) terminal devices, light terminal devices (Light UE), reduced capability user equipment (REDCAP UE), subscriber units, subscriber stations, mobile stations, remote stations, access points (APs), remote terminals, access terminals, user terminals, user agents, or user devices, etc., and can also be user equipment in future communication systems. The present patent does not limit this.

[0033] The communication device in the embodiments of the present application can be an access network device, a core network device, or a server, etc. The access network device can be a base station in a terrestrial communication network, and can also be a base station in an NTN network. For example, an evolved NodeB (eNB), a next-generation Node (gNB) in an NR system, a road side unit (RSU), and can also be a centralized unit (CU) and a distributed unit (DU) in a cloud access network system, and can also be an access network device in a future communication system. The core network device can be a mobility management device (MME), a serving gateway (SGW), a packet data node gateway (PGW), a home subscriber server (HSS) storing user subscription information, a policy control unit (PCRF), etc., and can also be a core network device in a future communication system. The present application does not limit this.

[0034] The embodiment of the present application provides a frequency priority determination method, which can be applied to the case of determining the frequency priority of a UE. Specifically, the frequency priority determination method can be executed by an information device, which can be realized by software and / or hardware and integrated in a communication device. The communication device can be a UE or a network device, i.e., the UE can determine the priority of the candidate frequency by itself, or the network device can determine the priority of the candidate frequency for the UE. In addition, the network device can also issue the priority information of the candidate frequency to the UE, for example, the network device can indicate the priority of the candidate frequency to the UE through a system message, dedicated signaling, or an RRC release (RRC Release) message, an RRC reconfiguration message or other messages.

[0035] As shown in FIG. 2, the frequency priority method provided by the embodiment of the present application includes the following steps:

[0036] S110, determining the priority of the candidate frequency according to whether the MBS service is supported and / or the service area of the MBS service.

[0037] In the embodiment, the MBS service can be the MBS service that the UE is receiving, will receive or is interested in. There can be one or more MBS services. For example, in the current communication system, the UE is interested in three MBS services, which are MBS1, MBS2 and MBS3. For MBS1, the priority of the candidate frequency can be determined according to whether MBS1 is supported, for MBS2, the priority of the candidate frequency can be determined according to the service area of MBS2, and for MBS3, the priority of the candidate frequency can be determined according to whether MBS3 is supported and the service area of MBS3.

[0038] In the embodiment, the candidate frequency supporting the MBS service can be understood as that the UE can receive the MBS service by using the frequency, or can be understood as that the cell corresponding to the frequency contains the service area of the MBS service, or can be understood as that the service area of the MBS service covers part or all of the cell corresponding to the frequency. For one MBS service, there can be one or more candidate frequencies supporting the MBS service.

[0039] The service area of the MBS service can be understood as the area covered by the MBS service, or the area in which the MBS service can be received. In the NTN network, the services transmitted in different areas within the coverage of the network device can be different, different MBS services have their respective service areas, and the service areas of different MBS services can overlap. There can be one or more service areas of one MBS service in a cell, or there can be service areas of multiple MBS services. As shown in FIG. 3, the service area of the MBS service can be within one or more cells, can cover part of multiple cells, can cover the overlapping area between adjacent cells, or can completely cover one or more cells.

[0040] The alternative frequency mainly refers to the frequency for which the priority needs to be determined. For the alternative frequency, when the priority needs to be determined, the technical solution of the present application can be used.

[0041] The alternative frequency can be an available frequency or a candidate frequency, etc. The alternative frequency can be a frequency indicated by the network device and available for receiving the MBS service, or a frequency for which the network device indicates the priority, etc. The alternative frequency can include all available frequencies of the UE, or a subset of all available frequencies; can include frequencies corresponding to all cells around the UE or all neighboring cells, or a subset of frequencies corresponding to all cells around the UE or all neighboring cells; can include all frequencies supporting the MBS service (including the MBS service of interest and the MBS service not of interest), or a subset of all frequencies supporting the MBS service; can include all frequencies supporting the MBS service, or a subset of all frequencies supporting the MBS service; can include the MBS USD (User Service Description) or the frequency given in the system message, the RRC release (RRCReaease) message, the RRC reconfiguration message, the dedicated signaling, or other messages, or a subset thereof, or the frequency given to provide the MBS service of interest of the UE, or a subset thereof, etc. The present embodiment does not limit the frequency range of the alternative frequency.

[0042] Determining the priority of the alternative frequency can be determining the priority of all or part of the alternative frequency, can be determining the priority of all or part of the alternative frequency and sorting them in descending or ascending order of priority, can be determining which alternative frequency or frequencies is higher, can be determining which alternative frequency or frequencies is lower, or can be determining the relative priority of at least two alternative frequencies, etc. The priority can be represented by a numerical level, for example, in descending order of priority, the first level, the second level, …, the nth level (n is a positive integer), or can be represented by describing the priority degree, such as “high”, “medium”, “low”, etc.

[0043] In the embodiments of the present application, a priority of an alternative frequency is higher, including any of the following cases:

[0044] The priority of the alternative frequency is the highest among all or part of the alternative frequencies.

[0045] The priority of the alternative frequency is the highest priority (e.g., the first level or “high”).

[0046] The priority of the alternative frequency is higher than or not lower than a first specified level (e.g., higher than the second level or at least “medium”).

[0047] The priority of the alternative frequency is higher than that of one or more other alternative frequencies.

[0048] The priority of the alternative frequency is among the highest priorities (e.g., among the top three in the priority ranking result or among the top 50% in the priority ranking result) among all or part of the alternative frequencies.

[0049] Similarly, a priority of an alternative frequency is lower, including any of the following cases:

[0050] The priority of the alternative frequency is the lowest among all or part of the alternative frequencies.

[0051] The priority of the alternative frequency is the lowest priority (e.g., the nth level or “low”).

[0052] The priority of the alternative frequency is lower than or not higher than a second specified level (e.g., lower than the second level or at most “medium”, the second specified level can be the same as or different from the first specified level).

[0053] The priority of the alternative frequency is lower than that of one or more other alternative frequencies.

[0054] The priority of the alternative frequency is among the lowest priorities (e.g., among the lowest three in the priority ranking result or among the top 50% in the priority ranking result) among all or part of the alternative frequencies.

[0055] In the embodiments of the present application, factors for determining the priority of the alternative frequency include at least one of the following: whether the MBS service is supported, and the service area of the MBS service.

[0056] The priority of any candidate frequency is determined based on whether it supports MBS services. This can be done by determining whether the candidate frequency supports MBS services (if it does, the candidate frequency has a higher priority, and / or if it does not support MBS services, the candidate frequency has a lower priority); or by determining whether the candidate frequency belongs to a frequency range that supports MBS services (if it does, the candidate frequency has a higher priority, and / or if it does not belong to that range, the candidate frequency has a lower priority); or by determining the priority of the candidate frequency based on the number of candidate frequencies that support MBS services (for example, if only one candidate frequency supports MBS services, then that candidate frequency has a higher priority; conversely, if there are zero candidate frequencies that support MBS services (all candidate frequencies do not support MBS services), then all candidate frequencies have a lower priority).

[0057] The priority of determining any candidate frequency based on the service area of ​​the MBS service primarily considers whether the UE has a higher probability, longer duration, or faster speed of being within the MBS service area in the cell corresponding to that candidate frequency. If so, it better guarantees the reliability or continuity of the MBS service. For example, for any candidate frequency f... x The corresponding cell is Cell. x If UE and Cell x The service areas of the internal MBS business are relatively close together, Cell x The service area of ​​the internal MBS service is relatively large, and the UE is in the cell. x The dwell time within the service area of ​​the internal MBS service is relatively long, and the UE can reach the cell relatively quickly. x The service area of ​​the internal MBS service, and / or the UE's preferences, trends, or predicted paths all point to the Cell. x The service area of ​​the internal MBS service, etc., can be used as a basis for determining the higher priority of the candidate frequency.

[0058] Alternatively, the priority of candidate frequencies can be determined by combining two factors: whether MBS services are supported and the service area of ​​MBS services. For example, assign corresponding weights to the two factors, w1 and w2, respectively. For a candidate frequency, if its priority is determined by whether MBS services are supported (P1) and its priority is determined by the service area of ​​MBS services (P2), then the final priority of the candidate frequency is P1*w1 + P2*w2. If w1 and w2 are not set, or if w1 = w2, the two factors are of equal importance.

[0059] For example, for an alternative frequency, if its priority is determined to be lower according to any one factor, then the priority of the alternative frequency is finally determined to be lower;

[0060] For example, for an alternative frequency, if its priority is determined to be higher according to both factors, then the priority of the alternative frequency is finally determined to be higher;

[0061] For example, the priorities determined according to the two factors can be the same or different, and the priority corresponding to one factor can be finally determined as the priority of the alternative frequency according to the one factor;

[0062] For example, the two factors can have a primary and secondary relationship, for example, whether to support the MBS service as the primary factor and the service area of the MBS service as the secondary factor. For an alternative frequency, the primary factor is first used for judgment, and if necessary, the secondary factor is further used for judgment. Specifically, in the case where the priority of the alternative frequency is determined to be higher according to whether to support the MBS service, the priority of the alternative frequency can be further determined to be higher or lower according to the service area of the MBS service. In the case where the priority of the alternative frequency is determined to be lower according to whether to support the MBS service, the priority of the alternative frequency can be directly determined to be lower without considering the priority result determined according to the service area of the MBS service.

[0063] It should be noted that the application can determine the priority of the alternative frequency according to whether to support the MBS service and / or the service area of the MBS service during the MBS session, i.e., from the establishment of the MBS session to the release of the MBS session. The application can also determine the priority of the alternative frequency according to whether to support the MBS service and / or the service area of the MBS service during the non-MBS session, i.e., not from the establishment of the MBS session to the release of the MBS session. The application can also determine the priority of the alternative frequency according to whether to support the MBS service and / or the service area of the MBS service during other periods. The application can also determine the priority of the alternative frequency according to whether to support the MBS service and / or the service area of the MBS service throughout the entire process.

[0064] For example, referring to FIG. 1, the priority of the candidate frequency can be determined according to at least one of the following: f1 and f2 support MBS services, and the priority of f1 and f2 can be determined to be high; the service area (A2) in Cell1 is close to the UE, and the priority of f1 can be determined to be high; the number of service areas in Cell1 is large (two), and the priority of f1 can be determined to be high; the service area (A2) in Cell1 is closer to the UE than the service area in Cell2, and the priority of f1 can be determined to be higher than the priority of f2; the area of a service area in Cell1 (such as the area of A2) is large or the area of all service areas in Cell1 (the total area of A1 and A2) is large, and the priority of f1 can be determined to be high; f3 does not support MBS services or f4 is not a frequency available to the UE, and the priority of f3 or f4 can be determined to be low, and the like. On this basis, the UE can preferentially use f1 to receive MBS services through Cell1, so as to be able to enter the service area of the MBS service as soon as possible; the UE also does not use f3 or f4 to receive the MBS service through Cell3 or Cell4, so as to avoid MBS service reception failure, interruption or packet loss, and also to avoid unnecessary resource waste.

[0065] In summary, according to the frequency priority determination method of the embodiments of the present application, in the process of determining the priority of the candidate frequency, the association between the candidate frequency and the frequency and / or service area of the MBS service is determined according to whether the MBS service is supported and / or the service area of the MBS service, so as to reasonably determine the priority, and the priority of the candidate frequency that can improve the reliability of the MBS service is determined to be high, so as to improve the reliability of the MBS service in actual application.

[0066] In an embodiment, the method further comprises:

[0067] S120, selecting a target frequency according to the priority of the candidate frequency for receiving the MBS service.

[0068] In this embodiment, the target frequency can be a frequency selected from the candidate frequencies, for the UE to receive the MBS service. This embodiment does not limit the scenario of receiving the MBS service. For example, receiving the MBS service using the target frequency can mean that, when selecting the (initial) access cell, the UE accesses a target cell corresponding to the target frequency and receives the MBS service through the target frequency; for another example, in the cell reselection process, the UE can switch to a target cell corresponding to the target frequency and continue to receive the MBS service through the target frequency, and the like. Based on the priority of the candidate frequencies, a candidate frequency with a higher priority can be selected as the target frequency, a candidate frequency with a priority that is not lower can be selected as the target frequency, or a candidate frequency with a lower priority can be excluded, and the like.

[0069] Taking FIG. 1 as an example, assuming that the selected target frequency is f1, the UE can preferentially use f1 to receive the MBS service through Cell1 in the scenario of (initial) access or cell reselection, and the like. On this basis, the situation that the MBS service cannot be received or is lost or interrupted when using the target frequency can be reduced, and the reliability or continuity of the MBS service can be improved by reasonably selecting the target frequency.

[0070] In some scenarios, multiple target frequencies can also be selected. For example, multiple selected target frequencies can be displayed to the user, and the user can determine which target frequency to use finally or which target cell corresponding to the target frequency to enter; for another example, the UE can support simultaneously using multiple target frequencies to receive multiple MBS services in the overlapping area between the cells corresponding to different frequencies, and the like. Generally, one cell corresponds to one frequency, and the frequencies corresponding to different cells can be different; in the area where one cell overlaps with other cells, multiple frequencies can be corresponded.

[0071] It should be noted that determining the priority of the candidate frequencies can occur before or during the selection of the (initial) access cell or the cell reselection.

[0072] In an embodiment, the method further includes:

[0073] S130, performing cell reselection according to the priority of the candidate frequencies, wherein a target cell of the cell reselection is a cell corresponding to a target frequency selected from the candidate frequencies.

[0074] In this embodiment, the UE can receive the MBS service in the scenario of cell reselection. The process of cell reselection can mainly include:

[0075] 1) determining the available frequencies of the UE;

[0076] 2) selecting one from the neighboring cells supporting the MBS service as a target cell according to whether the available frequency supports the MBS service and / or a service area of the MBS service.

[0077] Taking FIG. 1 as an example, assuming that the selected target frequency is f1 and the target cell of the cell reselection is Cell1, the UE preferentially uses f1, enters Cell1 and receives the MBS service in the cell reselection process. On this basis, the situation that the MBS service cannot be received or the MBS service is lost or interrupted in the target cell of the cell reselection can be reduced, and the reliability of the cell reselection and the reliability or continuity of the MBS service can be improved.

[0078] It should be noted that for 1) in the cell reselection process, the UE can determine the available frequency of the UE by acquiring the frequency list indicated by the system message and the priority of the frequency indicated by the priority information.

[0079] It should be noted that for 2) in the cell reselection process, the UE can determine the priority of the frequency according to whether the MBS service is supported and / or the service area of the MBS service, and then select one from the neighboring cells supporting the MBS service as a target cell.

[0080] In an embodiment, the process of determining the priority of the candidate frequency according to whether the MBS service is supported and / or the service area of the MBS service includes: the priority of the candidate frequency supporting the MBS service is higher than the priority of the candidate frequency not supporting the MBS service.

[0081] For example, the candidate frequency includes the frequencies corresponding to three cells (Cell1, Cell2 and Cell3), which are f1, f2 and f3 in turn, wherein f1 and f2 support the MBS service and f3 does not support the MBS service, and it can be determined that the priority of f1 and f2 is higher than the priority of f3. On this basis, the candidate frequency supporting the MBS service can be preferentially selected, which can ensure that the frequency with higher priority supports the reception of the MBS service, thereby improving the reliability or continuity of the MBS service to a certain extent.

[0082] In an embodiment, the priority of the candidate frequency supporting the more important MBS service is higher than the priority of the candidate frequency supporting the less important MBS service.

[0083] For example, the alternative frequencies include frequencies corresponding to two cells (Cell 1 and Cell 2), which are f 1 and f 2 in sequence, where f 1 supports one MBS service (MBS 1), f 2 supports another MBS service (MBS 2), and MBS 1 is more important than MBS 2 (for example, MBS 1 has higher real-time requirements, more important service data to be transmitted, higher service priority or Qos requirements, etc.), it can be determined that the priority of f 1 is higher than the priority of f 2, or it can be determined that the priority of f 1 is relatively high, and / or the priority of f 2 is relatively low. On this basis, the alternative frequency supporting the more important MBS service can be selected preferentially, which can ensure the reliability or continuity of the important MBS service.

[0084] In an embodiment, the process of determining the priority of the alternative frequency according to whether the MBS service is supported and / or the service area of the MBS service includes: for the alternative frequency not supporting the MBS service, determining that the priority of the alternative frequency not supporting the MBS service is the lowest priority.

[0085] For example, the alternative frequencies f x Corresponding to the cells Cell x If f x does not support the MBS service, it is determined that the priority of f x is relatively low, for example, it can be determined that the priority of f x is the lowest priority. That is, if the MBS service cannot be received in the cell corresponding to an alternative frequency considered to be available, it is determined that the priority of the alternative frequency is the lowest. Where the alternative frequency considered to be available can also be referred to as an available frequency, which can be a frequency indicated by the network device to be available for receiving the MBS service, or a frequency for which the network device indicates the priority, etc. On this basis, the alternative frequency with the lowest priority can be quickly determined, and the alternative frequency with the lowest priority can be quickly excluded when selecting or using the target frequency, thereby improving the reliability or continuity of the MBS service.

[0086] In an embodiment, the process of determining the priority of the alternative frequency according to whether the MBS service is supported and / or the service area of the MBS service includes: in the case where the number of alternative frequencies supporting the MBS service is 1, determining that the priority of the alternative frequency supporting the MBS service is the highest priority.

[0087] For example, if only one candidate frequency supports the MBS service, it is determined that the priority of the candidate frequency is high, and specifically, it can be determined that the priority of the candidate frequency is the highest priority. That is, if the UE can only receive the MBS service by camping on one candidate frequency that provides the MBS service, it is considered that the priority of the candidate frequency is the highest. On this basis, the candidate frequency with the highest priority can be quickly determined, and the candidate frequency with the highest priority can be given priority when selecting or using the target frequency, thereby improving the reliability or continuity of the MBS service.

[0088] In an embodiment, the process of determining the priority of the candidate frequency according to whether the MBS service is supported and / or the service area of the MBS service includes: determining the priority of the candidate frequency according to whether the MBS service is supported by the candidate frequency and / or the relationship between the cell corresponding to the candidate frequency and the service area of the MBS service.

[0089] Specifically, it can be to determine the priority of all or part of the candidate frequencies, that is, to determine the priority of all or part of the candidate frequencies and sort them in descending or ascending order of priority, to determine which candidate frequency or candidate frequencies are higher, or to determine which candidate frequency or candidate frequencies are lower, or to determine the relative priority of at least two candidate frequencies, etc.

[0090] In this embodiment, for any candidate frequency, the relationship between the cell corresponding to the candidate frequency and the service area of the MBS service includes at least one of the following:

[0091] Relationship 1: whether the UE is in the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process;

[0092] Specifically, if the UE is in the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process, it can be determined that the priority of the candidate frequency is high, and / or if the UE is not in the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process, it can also be determined that the priority of the candidate frequency is low.

[0093] The UE in the service area corresponding to the MBS service can mean that the UE is in the service area corresponding to the MBS service as soon as the UE enters the cell corresponding to the candidate frequency, or can mean that the edge of the cell corresponding to the candidate frequency overlaps, is tangent to, or is adjacent to the edge of the service area corresponding to the MBS service, or can mean that the intersection position between the current cell of the UE and the cell corresponding to the candidate frequency overlaps, is tangent to, or is adjacent to the edge of the service area corresponding to the MBS service, or can mean that the service area corresponding to the MBS service covers the edge of the cell corresponding to the candidate frequency, or covers the intersection position between the current cell of the UE and the cell corresponding to the candidate frequency, or covers the position of the UE entering the cell corresponding to the candidate frequency, and the like.

[0094] For example, as shown in FIG. 1, after the UE enters Cell1, the UE is in the service area (A1), and it can be determined that the priority of f1 is higher; after the UE enters Cell2, the UE is not in the service area, and it can be determined that the priority of f2 is lower; and it can also be determined that the priority of f1 is higher than the priority of f2.

[0095] Relationship 2: the number of service areas corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process;

[0096] Specifically, after the UE enters the cell corresponding to the candidate frequency through the cell reselection process, the UE can be in one or more service areas, and the priority of the candidate frequency can be determined according to the number of service areas in which the UE is located at this time. For example, if the number of service areas in which the UE is located is larger, the priority of the candidate frequency is higher; if the number of service areas in which the UE is located is smaller, the priority of the candidate frequency is lower; the larger the number of service areas in which the UE is located, the higher the priority; and / or the priority of the candidate frequency in which the number of service areas in the corresponding cell is larger is higher than the priority of the candidate frequency in which the number of service areas in the corresponding cell is smaller, and the like.

[0097] For example, as shown in FIG. 4, the candidate frequency includes frequencies corresponding to three cells (Cell1, Cell2, and Cell3), which are f1, f2, and f3 in turn, and the diagonal filled areas (A1 and A2) represent the service area of one MBS service, and the dot filled area (A3) represents the service area of another MBS service, and A2 and A3 overlap. After the UE enters Cell1 or Cell2, the UE will be in at least one service area, and specifically, after the UE enters Cell1, the UE is in one service area (A1), after the UE enters Cell2, the UE is in two service areas (A2 and A3), and after the UE enters Cell3, the UE is not in any service area, and at least one of the following can be determined:

[0098] The priorities of f1 and f2 are higher;

[0099] The priority of f3 is lower;

[0100] The priority of f1 and f2 is higher than the priority of f3.

[0101] The priority of f2 is not lower than the priority of f1.

[0102] Relationship 3: After entering the cell corresponding to the candidate frequency through the cell reselection process, the area of the service area corresponding to the MBS service;

[0103] Specifically, after the UE enters the cell corresponding to the candidate frequency through the cell reselection process, if it is in at least one service area, the area of the service area it is in can be different, and the priority of the candidate frequency can be determined according to the area of the service area it is in at this time. For example, if the area of the service area it is in is larger, the priority of the candidate frequency is higher; if the area of the service area it is in is smaller, the priority of the candidate frequency is lower; the larger the area of the service area it is in, the higher the priority; and / or the priority of the candidate frequency in the corresponding cell in which the area of the service area it is in is larger is higher than the priority of the candidate frequency in the corresponding cell in which the area of the service area it is in is smaller, etc. The area of the service area it is in is larger, and the priority of the corresponding candidate frequency is higher, which can to some extent make the UE have a greater probability, a longer time or a faster speed to be in the service area of the MBS service after entering the cell corresponding to the candidate frequency, thereby improving the reliability or continuity of the MBS service.

[0104] For example, for an MBS service, the candidate frequency includes the frequencies corresponding to two cells (Cell1 and Cell2), which are f1 and f2 in turn, and the area of the service area the UE is in after entering Cell1 is 300 square kilometers, and the area of the service area the UE is in after entering Cell2 is 100 square kilometers. At least one of the following can be determined:

[0105] The priority of f1 is higher;

[0106] The priority of f2 is lower;

[0107] The priority of f1 is higher than the priority of f2.

[0108] For example, as shown in FIG. 4, the alternative frequencies include frequencies corresponding to three cells (Cell 1, Cell 2 and Cell 3), in sequence, f1, f2 and f3, two MBS services, MBS1 and MBS2, the hatched areas (A1 and A2) represent the service area of one MBS service, the dot-filled area (A3) represents the service area of another MBS service, and A2 and A3 overlap. After entering Cell 1 or Cell 2, the UE is in at least one service area, in one service area (A1) after entering Cell 1, in two service areas (A2 and A3) after entering Cell 2, and not in any service area after entering Cell 3, the areas corresponding to A1, A2 and A3 are S1, S2 and S3 respectively, S1 < S2 < S3, the area of the service area corresponding to the MBS service after the UE enters Cell 1 is S1, and the area of the service area corresponding to the MBS service after the UE enters Cell 2 (assuming S') can be determined according to S2 and / or S3, if S' > S1, at least one of the following can be determined:

[0109] f1 and f2 have higher priority;

[0110] f3 has lower priority;

[0111] f1 and f2 have higher priority than f3;

[0112] f2 has no lower priority than f1.

[0113] It should be noted that for one service area, the area of the service area can be the absolute area of the service area, for example, 100 square kilometers, or the proportion of the area occupied by the service area in the corresponding cell, for example, the area of the service area of the MBS service in Cell 2 in FIG. 4 is 15% of the area of Cell 2.

[0114] If the service area belongs to the overlapping part of multiple service areas, the area of the service area can be determined according to the areas of the multiple overlapping service areas, for example, can be the sum of the areas of the multiple service areas, the union of the areas of the multiple service areas, the average of the areas of the multiple service areas, the minimum area in the multiple service areas, the maximum area in the multiple service areas, the weighted area of the multiple service areas, the area of the service area corresponding to the most important MBS service in the multiple service areas, the area of the service area closest to the UE in the multiple service areas, etc. For example, the area S' of the service area in which the UE enters Cell2 in FIG. 4 can be the sum of the areas of the multiple service areas S2+S3, can be the union of A2 and A3 (the union of A2 and A3 in FIG. 4 is A3, and the area is S2∪S3), can be the average of the areas of the multiple service areas (S2+S3) / 2, can be the minimum area in the multiple service areas min(S2, S3), can be the maximum area in the multiple service areas max(S2, S3), can be the area of the service area corresponding to the more important MBS service in MBS1 and MBS2 (for example, MBS2 is more important, and S2 is used), can be the weighted area of the multiple service areas w a *S2+w b *S3, where w a and w b are the weights corresponding to A2 and A3 respectively, or the weights corresponding to MBS1 and MBS2 respectively, or the area of the service area closest to the UE in A2 and A3, etc. The present embodiment does not limit the calculation method of the overlapping area of multiple service areas.

[0115] The distance between a service area and the UE can refer to the distance between the service area and the UE in the moving path or predicted path or planned path of the UE, or can refer to the straight-line distance between the service area and the UE. The path can be obtained according to the preference of the UE, the historical moving track, the path planning and / or the predicted future moving track. The straight-line distance between the service area and the UE can be the distance between the center of the service area and the position of the UE, as shown by the dashed line between the center of A4 and the position of the UE in (a) of FIG. 5; can be the minimum distance between the edge of the service area and the position of the UE, as shown by the dashed line between the point on the right edge of A4 and the position of the UE in (b) of FIG. 5; can be the distance between the center of the service area and the position of the UE entering the cell to which the service area belongs, as shown by the dashed line between the center of A4 and the position of the UE entering Cell1 in (c) of FIG. 5, where the UE enters Cell1 from Cell0 in the direction indicated by the arrow; can be the minimum distance between the edge of the service area and the position of the UE entering the cell to which the service area belongs, as shown by the dashed line between the point on the right edge of A4 and the position of the UE entering Cell1 in (d) of FIG. 5, where the UE enters Cell1 from Cell0 in the direction indicated by the arrow; can be the distance between the center of the service area and the intersection of the two cells before and after the UE enters the cell to which the service area belongs, as shown by the dashed line between the center of A4 and the intersection of Cell0 and Cell1 in (e) of FIG. 5; can be the distance between the point on the right edge of A4 and the intersection of Cell0 and Cell1; can be the minimum distance between the edge of the service area and the intersection of the two cells before and after the UE enters the cell to which the service area belongs, as shown by the dashed line between the point on the right edge of A4 and the intersection of Cell0 and Cell1 in (f) of FIG. 5, and the like. The calculation manner of the distance is not limited in this embodiment. The closer distance between a service area and the UE can indicate that the UE has a greater probability, a longer time or a faster speed to be in the service area of the MBS service after entering the cell to which the service area belongs.

[0116] Relationship 4: The number of service areas corresponding to the MBS service in the cell corresponding to the alternative frequency;

[0117] Specifically, the number of service areas in the cell corresponding to each candidate frequency can be different, and the priority of the candidate frequency can be determined according to the number of service areas in the cell, for example, the number of service areas in the cell corresponding to the candidate frequency is larger, the priority of the candidate frequency is higher, the number of service areas in the cell corresponding to the candidate frequency is smaller, the priority of the candidate frequency is lower, the larger the number of service areas in the cell corresponding to the candidate frequency, the higher the priority, and / or the priority of the candidate frequency corresponding to the larger number of service areas in the cell is higher than the priority of the candidate frequency corresponding to the smaller number of service areas in the cell, and the like. The number of service areas in the cell corresponding to the candidate frequency is larger, the priority of the corresponding candidate frequency is higher, which can to some extent make the UE have a larger probability, a longer duration or a faster speed in the service area of the MBS service after entering the cell corresponding to the candidate frequency, thereby improving the reliability or continuity of the MBS service.

[0118] For example, the candidate frequency includes frequencies corresponding to three cells (Cell1, Cell2 and Cell3), in turn f1, f2 and f3, there are 2 service areas in Cell1, 1 service area in Cell2, and 0 service area in Cell3, then at least one of the following can be determined:

[0119] f1 and f2 have higher priority;

[0120] f3 has lower priority;

[0121] The priority of f1 and f2 is higher than the priority of f3;

[0122] The priority of f2 is not lower than the priority of f1.

[0123] Relationship 5: The area of the service area corresponding to the MBS service in the cell corresponding to the candidate frequency;

[0124] Specifically, the area of the service area in the cell corresponding to each candidate frequency can be different, and the priority of the candidate frequency can be determined according to the area of the service area in the cell, for example, the area of the service area in the cell corresponding to the candidate frequency is larger, the priority of the candidate frequency is higher; the area of the service area in the cell corresponding to the candidate frequency is smaller, the priority of the candidate frequency is lower; the larger the area of the service area in the cell corresponding to the candidate frequency, the higher the priority; and / or the priority of the candidate frequency corresponding to the larger area of the service area in the cell is higher than the priority of the candidate frequency corresponding to the smaller area of the service area in the cell, and the like. The area of the service area in the cell corresponding to the candidate frequency is larger, the priority of the corresponding candidate frequency is higher, which can to some extent indicate that the UE has a larger probability, a longer duration or a faster speed in the service area of the MBS service after entering the cell corresponding to the candidate frequency.

[0125] For example, the alternative frequency includes the frequencies corresponding to two cells (Cell1 and Cell2), in sequence, f1 and f2, wherein the area of the service area in Cell1 is S1, and the area of the service area in Cell2 is S2, S1>S2, at least one of the following can be determined;

[0126] The priority of f1 is higher than the priority of f2;

[0127] The priority of f1 is higher;

[0128] The priority of f2 is lower.

[0129] It should be noted that if there are multiple service areas in a cell, the multiple service areas can be the same MBS service or different MBS services, and the multiple service areas can overlap or not overlap, then the area of the service area corresponding to the MBS service in the cell can be the sum of the areas of the multiple service areas, the union of the areas of the multiple service areas, the average of the areas of the multiple service areas, the smallest area of the multiple service areas, the largest area of the multiple service areas, the weighted area of the multiple service areas, the area of the service area corresponding to the most important MBS service in the multiple service areas, the area of the service area closest to the UE in the multiple service areas, etc.

[0130] Relationship 6: the time length for reaching the service area corresponding to the MBS service after entering the cell corresponding to the alternative frequency through the cell reselection process;

[0131] Specifically, after entering the cell corresponding to the alternative frequency, it can not be immediately in the service area of the MBS service, but it can take a period of time to reach the service area of the MBS service. The process of determining the priority of the alternative frequency can include: the time length for reaching the service area of the MBS service is longer, the priority of the corresponding alternative frequency is lower; the time length for reaching the service area of the MBS service is shorter, the priority of the corresponding alternative frequency is higher; and / or the priority of the alternative frequency with shorter time length for reaching the service area of the MBS service is higher than the priority of the alternative frequency with longer time length for reaching the service area of the MBS service, etc. The time length for reaching the service area of the MBS service is shorter, the priority of the corresponding alternative frequency is higher, which can to some extent make the UE have a greater probability, a longer time or a faster speed in the service area of the MBS service after entering the cell corresponding to the alternative frequency, thereby improving the reliability and continuity of the MBS service.

[0132] For example, the alternative frequency includes the frequencies corresponding to two cells (Cell 1 and Cell 2), and the frequencies are f1 and f2 in turn. The UE needs 1 minute to reach the service area after entering Cell 1, and needs 2 minutes to reach the service area after entering Cell 2. At least one of the following can be determined:

[0133] f1 has a higher priority;

[0134] f2 has a lower priority;

[0135] f1 has a higher priority than f2.

[0136] If there are multiple service areas in the cell corresponding to an alternative frequency, the time length for the UE to reach the service area corresponding to the MBS service after entering the cell corresponding to the alternative frequency can be determined according to the shortest time length, the longest time length, the total time length, the average time length, the weighted time length, the time length for reaching the service area corresponding to the most important MBS service, or the time length for reaching the service area closest to the UE in multiple service areas, and the priority of the alternative frequency can be determined accordingly. For example, the alternative frequency f x corresponds to a cell Cell x with two service areas A1 and A2. A1 corresponds to an MBS service MBS1, and A2 corresponds to an MBS service MBS2. The UE needs T1 time length to reach A1 and needs T2 time length to reach A2 after entering Cell x . For Cell x , the time length for reaching the service area corresponding to the MBS service after entering Cell a may be the shortest time length min(T1, T2), the longest time length max(T1, T2), the total time length (T1+T2), the average time length ((T1+T2) / 2), the weighted time length (w b *T1+w a *T2, where w b and w x are the weights corresponding to A1 and A2 respectively or the weights corresponding to MBS1 and MBS2 respectively), the time length for reaching the service area corresponding to the most important MBS service (e.g., MBS2 is the most important, and T2 is the time length), or the time length for reaching the service area closest to the UE in A1 and A2.

[0137] Relationship 7: the arrival time for reaching the service area corresponding to the MBS service after entering the cell corresponding to the alternative frequency through the cell reselection process;

[0138] Specifically, after entering the cell corresponding to the alternative frequency, the UE can not be immediately in the service area of the MBS service, and it can take a period of time to reach the service area of the MBS service. The process of determining the priority of the alternative frequency can include: the later the arrival time of the UE to the service area of the MBS service, the lower the priority of the corresponding alternative frequency; the earlier the arrival time of the UE to the service area of the MBS service, the higher the priority of the corresponding alternative frequency; and / or the priority of the alternative frequency with an earlier arrival time of the UE to the service area of the MBS service is higher than the priority of the alternative frequency with a later arrival time of the UE to the service area of the MBS service, and the like. The earlier the arrival time of the UE to the service area of the MBS service, the higher the priority of the corresponding alternative frequency, which can to some extent make the UE have a greater probability, a longer duration or a faster speed to be in the service area of the MBS service after entering the cell corresponding to the alternative frequency, thereby improving the reliability or continuity of the MBS service.

[0139] For example, the alternative frequency includes frequencies corresponding to two cells (Cell1 and Cell2), which are f1 and f2 in turn. The UE reaches the service area at t1 after entering Cell1 and reaches the service area at t2 after entering Cell2. If t1 is earlier than t2, at least one of the following can be determined:

[0140] The priority of f1 is higher;

[0141] The priority of f2 is lower;

[0142] The priority of f1 is higher than the priority of f2.

[0143] If there are multiple service areas in the cell corresponding to an alternative frequency, the arrival time of the UE to the service area corresponding to the MBS service after entering the cell corresponding to the alternative frequency can be determined according to the earliest arrival time, the latest arrival time, the average arrival time, the weighted arrival time, the arrival time of the UE to the service area corresponding to the most important MBS service, or the time length of the UE to the service area closest to the UE among multiple service areas, and the priority of the alternative frequency can be determined accordingly. For example, the alternative frequency f x corresponds to a cell Cell x with two service areas A1 and A2. A1 corresponds to an MBS service MBS1, and A2 corresponds to an MBS service MBS2. After the UE enters Cell x , the UE reaches A1 at t1 and reaches A2 at t2. For Cell x, the time length for entering Cellx and reaching the service area corresponding to the MBS service can be the minimum time length min(t1, t2), the maximum time length max(t1, t2), the time length sum (t1+t2), the average time length ((t1+t2) / 2), the weighted time length (w a *t1+w b *t2, wherein w a and w b are the weights corresponding to A1 and A2 respectively or the weights corresponding to MBS1 and MBS2 respectively), the time length for reaching the service area corresponding to the most important MBS service (e.g. MBS2 is the most important, then t2), or the time length for reaching the service area of A1 and A2 closest to the UE, etc.

[0144] Relationship 8: After entering the cell corresponding to the candidate frequency through the cell reselection process, whether the UE can reach the service area corresponding to the MBS service within a first set time length;

[0145] Specifically, after entering the cell corresponding to the candidate frequency, the UE can not be immediately in the service area of the MBS service, but can take a period of time to reach the service area of the MBS service. The process of determining the priority of the candidate frequency can include: if the UE can reach the service area corresponding to the MBS service within a first set time length after entering the cell corresponding to the candidate frequency, it can be determined that the priority of the candidate frequency is higher; if the UE cannot reach the service area corresponding to the MBS service within the first set time length after entering the cell corresponding to the candidate frequency, it can be determined that the priority of the candidate frequency is lower; and / or, the priority of the candidate frequency that can reach the service area corresponding to the MBS service within the first set time length is higher than the priority of the candidate frequency that cannot reach the service area corresponding to the MBS service within the first set time length. The first set time length can be set according to actual needs. The greater the value of the first set time length, the greater the probability that the candidate frequency has a higher priority. The UE can reach the service area corresponding to the MBS service within the first set time length, which indicates that the UE has a greater probability, a longer time or a faster speed to be in the service area of the MBS service after entering the cell corresponding to the candidate frequency.

[0146] Taking an example of only one service area in the cell corresponding to the candidate frequency, for example, the first set time length is 2 minutes: the candidate frequency includes the frequencies corresponding to two cells (Cell1 and Cell2), in turn f1 and f2, the UE can reach the service area within 2 minutes after entering Cell1, and cannot reach the service area within 2 minutes after entering Cell2, then at least one of the following can be determined: the priority of f1 is higher, the priority of f2 is lower, the priority of f1 is higher than the priority of f2.

[0147] If there are multiple service areas in the cell corresponding to the alternative frequency, the priority of the alternative frequency can be determined according to whether the UE can reach all service areas, reach any designated service area, reach the service area closest to the UE, or reach the service area corresponding to the most important MBS service within a first set time period.

[0148] Relationship 9: the distance between the location of the cell corresponding to the alternative frequency entered by the UE through the cell reselection process and the service area corresponding to the MBS service;

[0149] Specifically, the location of the cell corresponding to the alternative frequency entered by the UE through the cell reselection process can not be adjacent or overlapping with the service area corresponding to the MBS service, and there can be a certain distance between the location of the cell corresponding to the alternative frequency entered by the UE through the cell reselection process and the service area corresponding to the MBS service. The process of determining the priority of the alternative frequency can include: if the distance between the location of the cell corresponding to the alternative frequency entered by the UE through the cell reselection process and the service area corresponding to the MBS service is long, the priority of the corresponding alternative frequency is low; if the distance between the location of the cell corresponding to the alternative frequency entered by the UE through the cell reselection process and the service area corresponding to the MBS service is short, the priority of the corresponding alternative frequency is high; and / or, the priority of the alternative frequency with a shorter distance between the location of the cell corresponding to the alternative frequency entered by the UE through the cell reselection process and the service area corresponding to the MBS service is higher than the priority of the alternative frequency with a longer distance between the location of the cell corresponding to the alternative frequency entered by the UE through the cell reselection process and the service area corresponding to the MBS service. If the distance between the location of the cell corresponding to the alternative frequency entered by the UE through the cell reselection process and the service area corresponding to the MBS service is short, the priority of the corresponding alternative frequency is high, which can to some extent enable the UE to be in the service area of the MBS service after entering the cell corresponding to the alternative frequency with a greater probability, for a longer time or at a faster speed, and improve the reliability or continuity of the MBS service.

[0150] For example: the alternative frequency includes the frequencies corresponding to two cells (Cell1 and Cell2), which are f1 and f2 in turn, the UE is 1 km away from the service area 1 after entering Cell1, and is 2 km away from the service area 2 after entering Cell2, and at least one of the following can be determined:

[0151] The priority of f1 is high;

[0152] The priority of f2 is low;

[0153] The priority of f1 is higher than the priority of f2.

[0154] If a candidate frequency corresponds to a cell with multiple service areas, the location of the cell corresponding to the candidate frequency and its distance to the service area corresponding to the MBS service can be determined based on the minimum, maximum, average, and weighted distances between the UE and these multiple service areas after entering the corresponding cell, the distance to the service area corresponding to the most important MBS service, or the distance to the service area closest to the UE. This distance is then used to determine the priority of the candidate frequency. For example: candidate frequency f x Corresponding Cell x There are two service areas, A1 and A2. A1 corresponds to one MBS service, MBS1, and A2 corresponds to one MBS service, MBS2. When the UE enters the Cell... x After that, the distance to A1 is d1, and the distance to A2 is d2; then for Cell x Enter Cell x The distance between the location and the service area corresponding to the MBS service can be the minimum distance min(d1, d2), the maximum distance max(d1, d2), the average distance ((d1+d2) / 2), and the weighted distance (w) corresponding to multiple service areas. a *d1+w b *d2, where w a and w b These can be the weights corresponding to A1 and A2, or the weights corresponding to MBS1 and MBS2, respectively; the distance to the service area corresponding to the most important MBS service (e.g., if MBS2 is the most important, then it is d2); or the distance to the service area closest to the UE (e.g., if d1 > d2, then it is d2), etc.

[0155] Relationship 10: The duration of stay within the service area corresponding to the MBS service after entering the cell corresponding to the alternative frequency through the cell reselection process;

[0156] Specifically, if the UE stays in the service area corresponding to the MBS service for a long time after entering the cell corresponding to the alternative frequency, it can be determined that the priority of the alternative frequency is high; if the UE stays in the service area corresponding to the MBS service for a short time after entering the cell corresponding to the alternative frequency, it can be determined that the priority of the alternative frequency is low; and / or, the priority of the alternative frequency for which the UE stays in the service area corresponding to the MBS service for a long time is higher than the priority of the alternative frequency for which the UE stays in the service area corresponding to the MBS service for a short time. The stay time in a service area can be understood as the stay time after the UE first or once enters the service area, or the total stay time of multiple times of entering the service area, or the ratio of the stay time in the service area to the stay time in the cell, etc. The UE stays in the service area corresponding to the MBS service for a long time, and the priority of the corresponding alternative frequency is high, which can make the UE have a greater probability, a longer time or a faster speed to stay in the service area of the MBS service after entering the cell corresponding to the alternative frequency, thereby improving the reliability or continuity of the MBS service.

[0157] The stay time can be the time after the UE first or once enters the service area, or the total time of multiple stays, or the ratio of the stay time in the service area to the stay time in the cell.

[0158] For example: the alternative frequency includes the frequencies corresponding to two cells (Cell1 and Cell2), in turn f1 and f2, the UE stays in the service area for 30 minutes after entering Cell1, and stays in the service area for 10 minutes after entering Cell2, then at least one of the following can be determined:

[0159] f1 has a high priority;

[0160] f2 has a low priority;

[0161] f1 has a higher priority than f2.

[0162] If there are multiple service areas in the cell corresponding to an alternative frequency, the stay time of the UE in the service area corresponding to the MBS service after entering the cell corresponding to the alternative frequency can be determined according to the minimum stay time, the maximum stay time, the average stay time, the weighted stay time, the stay time in the service area corresponding to the most important MBS service, or the stay time in the nearest service area to the UE, etc., and then the priority of the alternative frequency is determined accordingly. For example: the alternative frequency f x corresponds to the cell Cell x ​There are two service areas A1 and A2, A1 corresponds to an MBS service MBS1, and A2 corresponds to an MBS service MBS2. When the UE enters a cell x , stays in A1 for a duration of r1, and stays in A2 for a duration of r2, then for the cell x , the location where the UE enters the cell x may be the duration of stay in the service area corresponding to the MBS service with the minimum duration of stay min(r1, r2), the maximum duration of stay max(r1, r2), the average duration of stay ((r1+r2) / 2), the weighted duration of stay (w a *r1+w b *r2, where w a and w b are the weights corresponding to A1 and A2 respectively or the weights corresponding to MBS1 and MBS2 respectively), the duration of stay in the service area corresponding to the most important MBS service (e.g., MBS2 is the most important, then r2), or the duration of stay in the service area closest to the UE (e.g., A2 is closer, then r2), etc.

[0163] Relationship 11: After entering the cell corresponding to the candidate frequency through the cell reselection process, whether the UE is in the service area corresponding to the MBS service within a second set duration;

[0164] Specifically, if the UE can be in the service area corresponding to the MBS service within the second set duration after entering the cell corresponding to the candidate frequency, it can be determined that the priority of the candidate frequency is high; if the UE cannot be in the service area corresponding to the MBS service within the second set duration after entering the cell corresponding to the candidate frequency, it can be determined that the priority of the candidate frequency is low; and / or, the priority of the candidate frequency that can be in the service area corresponding to the MBS service within the second set duration is higher than the priority of the candidate frequency that cannot be in the service area corresponding to the MBS service within the second set duration. Wherein, being in a service area within a second set duration can be understood as always being in the service area or not leaving the service area within the second set duration, or being in the service area or not leaving the service area most of the time (e.g., 80% of the time within the second set duration), etc. The second set duration can be set according to actual needs, and the greater the value of the second set duration, the greater the probability that the candidate frequency has a higher priority. The UE can be in the service area corresponding to the MBS service within the second set duration, which determines a higher priority for the corresponding candidate frequency, which to some extent can make the UE have a greater probability, a longer duration or a faster speed of being in the service area of the MBS service after entering the cell corresponding to the candidate frequency, thereby improving the reliability or continuity of the MBS service.

[0165] For example, if the second set duration is 10 minutes: the alternative frequencies include the frequencies corresponding to two cells (Cell1 and Cell2), namely f1 and f2 respectively. If the UE is in the service area for 10 minutes after entering Cell1, but is not in the service area for 10 minutes after entering Cell2, then at least one of the following can be determined:

[0166] f1 has higher priority;

[0167] f2 has a lower priority;

[0168] f1 has a higher priority than f2.

[0169] Relationship 12: The duration of time the user leaves the service area outside the service area corresponding to the MBS service after entering the cell corresponding to the alternative frequency through the cell reselection process;

[0170] Specifically, if a UE enters the cell corresponding to a candidate frequency and has a short departure time within the service area corresponding to the MBS service, then that candidate frequency has a higher priority. Conversely, if a UE enters the cell corresponding to a candidate frequency and has a long departure time within the service area corresponding to the MBS service, then that candidate frequency has a lower priority. And / or, the priority of a candidate frequency with a shorter departure time within the service area corresponding to the MBS service is higher than the priority of a candidate frequency with a longer departure time within the service area corresponding to the MBS service. The departure time within a service area can be understood as the duration of the UE's first or a single departure from that service area, the total duration of multiple departures, or the ratio of the departure time to the time spent in that cell. A shorter departure time within the service area corresponding to the MBS service, resulting in a higher priority for the corresponding candidate frequency, can, to some extent, increase the probability, duration, or speed at which the UE remains within the MBS service area after entering the cell corresponding to the candidate frequency, thereby improving the reliability and flexibility of the MBS service.

[0171] Taking a scenario where the cell corresponding to a candidate frequency has only one service area as an example, for instance: the candidate frequencies include the frequencies corresponding to two cells (Cell1 and Cell2), namely f1 and f2 respectively. If the UE leaves the service area 10 minutes after entering Cell1 and leaves the service area 30 minutes after entering Cell2, then at least one of the following can be determined:

[0172] f1 has higher priority;

[0173] f2 has a lower priority;

[0174] f1 priority is higher than f2 frequency priority.

[0175] If there are multiple service areas in the cell corresponding to the alternative frequency, the leaving duration in the service area corresponding to the MBS service after entering the cell corresponding to the alternative frequency can be determined according to the minimum leaving duration, the maximum leaving duration, the average leaving duration, the weighted leaving duration, the leaving duration of the service area corresponding to the most important MBS service, the leaving duration of the nearest service area, and the like, after the UE enters the corresponding cell. Then, the priority of the alternative frequency is determined according to the leaving duration. For example, if the cell corresponding to the alternative frequency f x The corresponding cell Cell x has two service areas A1 and A2, A1 corresponds to an MBS service MBS1, and A2 corresponds to an MBS service MBS2. After the UE enters Cell x , the leaving duration of A1 is g1, and the leaving duration of A2 is g2. Then, for Cell x , the leaving duration of the position where the UE enters Cell x and the service area corresponding to the MBS service can be the minimum leaving duration min(g1, g2), the maximum leaving duration max(g1, g2), the average leaving duration ((g1+g2) / 2), the weighted leaving duration (w a *g1+w b *g2, where w a and w b are the weights corresponding to A1 and A2, respectively, or the weights corresponding to MBS1 and MBS2, respectively), the leaving duration of the service area corresponding to the most important MBS service (e.g., MBS2 is the most important, and g2 is the leaving duration), the leaving duration of the nearest service area (e.g., MBS2 is closer, and g2 is the leaving duration), and the like.

[0176] Relationship 13: The leaving area outside the service area corresponding to the MBS service after entering the cell corresponding to the alternative frequency through the cell reselection process.

[0177] Specifically, if the UE enters a cell corresponding to the alternative frequency, and the leaving area outside the service area corresponding to the MBS service is small, it can be determined that the priority of the alternative frequency is high; if the UE enters a cell corresponding to the alternative frequency, and the leaving area outside the service area corresponding to the MBS service is large, it can be determined that the priority of the alternative frequency is low; and / or, the priority of the alternative frequency with a small leaving area outside the service area corresponding to the MBS service is higher than the priority of the alternative frequency with a large leaving area outside the service area corresponding to the MBS service. The leaving area outside the service area corresponding to the MBS service is small, and the priority of the corresponding alternative frequency is high, which can enable the UE to be in the service area of the MBS service with a higher probability, for a longer time or at a faster speed after entering the cell corresponding to the alternative frequency, and improve the reliability or flexibility of the MBS service.

[0178] For example, the alternative frequency includes frequencies corresponding to two cells (Cell1 and Cell2), which are f1 and f2 in turn, the leaving area outside the service area after the UE enters Cell1 is 100 square meters, and the leaving area outside the service area after the UE enters Cell2 is 300 square meters, and at least one of the following can be determined:

[0179] f1 has a high priority;

[0180] f2 has a low priority;

[0181] f1 has a higher priority than f2.

[0182] If there are multiple service areas in a cell corresponding to an alternative frequency, the leaving area inside the service area corresponding to the MBS service after the UE enters the cell corresponding to the alternative frequency can be determined according to the minimum leaving area, the maximum leaving area, the union of the leaving areas, the average leaving area, the weighted leaving area or the leaving area of the service area corresponding to the most important MBS service, and the priority of the alternative frequency can be determined accordingly. For example, the alternative frequency f x corresponds to a cell Cell x with two service areas A1 and A2, A1 corresponds to an MBS service MBS1, and A2 corresponds to an MBS service MBS2, the leaving area outside A1 after the UE enters Cell x is y1, and the leaving area outside A2 is y2; for Cell x , the leaving area inside Cell xThe location of the UE and the exit area of the service area corresponding to the MBS service can be the minimum exit area min(y1, y2), the maximum exit area max(y1, y2), the average exit area ((y1+y2) / 2), the weighted exit area (w a *y1+w b *y2, wherein w a and w b are the weights corresponding to A1 and A2 respectively or the weights corresponding to MBS1 and MBS2 respectively), the union of the exit areas (y1∪y2), or the exit area of the service area corresponding to the most important MBS service (e.g., y2 if MBS2 is the most important), etc.

[0183] Relationship 14: Whether the cell corresponding to the pending frequency contains part or all of the service area corresponding to the MBS service.

[0184] Specifically, if the cell corresponding to the pending frequency contains part or all of the service area corresponding to the MBS service, it means that the pending frequency supports the MBS service, and the priority of the pending frequency is higher; if the cell corresponding to the pending frequency does not contain part or all of the service area corresponding to the MBS service, it means that the pending frequency does not support the MBS service, and the priority of the pending frequency is higher; and / or, the priority of the pending frequency whose corresponding cell contains part or all of the service area corresponding to the MBS service is higher than the priority of the pending frequency whose corresponding cell does not contain part or all of the service area corresponding to the MBS service. The priority of the corresponding cell containing part or all of the service area corresponding to the MBS service is higher for the corresponding pending frequency, which can to some extent make the UE have a greater probability, a longer duration or a faster speed in the service area of the target MBS service after entering the cell corresponding to the pending frequency, and improve the reliability or flexibility of the MBS service.

[0185] For example: the pending frequency includes the frequencies corresponding to two cells (Cell1 and Cell2), which are f1 and f2 in turn, Cell1 contains part or all of the service area corresponding to the MBS service, and Cell2 does not contain part or all of the service area corresponding to the MBS service, then at least one of the following can be determined:

[0186] f1 has a higher priority;

[0187] f2 has a lower priority;

[0188] f1 has a higher priority than f2.

[0189] On the basis of the above, further, if the cell corresponding to the to-be-determined frequency contains all the areas of the service area corresponding to the MBS service, the priority of the to-be-determined frequency is higher; the priority of the to-be-determined frequency corresponding to the cell containing all the areas of the service area corresponding to the MBS service is higher than the priority of the to-be-determined frequency corresponding to the cell containing part of the service area corresponding to the MBS service; and / or the priority of the to-be-determined frequency corresponding to the cell containing part of the service area corresponding to the MBS service is higher than the priority of the to-be-determined frequency corresponding to the cell not containing the service area corresponding to the MBS service.

[0190] For example: the to-be-determined frequency includes the frequencies corresponding to three cells (Cell1, Cell2 and Cell3), in turn f1, f2 and f3, Cell1 contains all the areas of the service area corresponding to the MBS service, Cell2 contains part of the service area corresponding to the MBS service, and Cell3 does not contain part or all of the service area corresponding to the MBS service, then at least one of the following can be determined:

[0191] f1 has a higher priority;

[0192] f3 has a lower priority;

[0193] f1 and f2 have higher priorities than f3;

[0194] f1 has a higher priority than f2;

[0195] f2 has a higher priority than f3.

[0196] In an embodiment, the process of determining the priority of the candidate frequency according to whether the MBS service is supported and / or the service area of the MBS service includes: determining the priority of the candidate frequency that supports the MBS service and whose corresponding cell and the service area of the MBS service satisfy the preset condition as the highest priority.

[0197] In this embodiment, if there are multiple candidate frequencies supporting the MBS service, the priority of which or which candidate frequency is the highest can be determined in the process of determining the priority. Specifically, if a candidate frequency supports the MBS service and the relationship between the cell corresponding to the candidate frequency and the service area of the MBS service satisfies the preset condition, the priority of the candidate frequency is determined to be the highest. That is, if the UE can receive the MBS service by camping on multiple candidate frequencies providing the MBS service, whether the relationship between the cell corresponding to the candidate frequency and the service area of the MBS service satisfies the corresponding preset condition is determined to determine whether the priority of the candidate frequency is the highest. It should be noted that there can be a relationship between the cell corresponding to multiple candidate frequencies and the service area of the MBS service, that is, there can be one or more candidate frequencies with the highest priority.

[0198] On this basis, the highest priority candidate frequency can be quickly determined, and the highest priority candidate frequency can be given priority in selecting or using the target frequency, thereby improving the reliability or continuity of the MBS service.

[0199] In an embodiment, the process of determining the priority of the candidate frequency can further include at least one of the following:

[0200] In the case where the number of candidate frequencies supporting the MBS service is 0, it is determined that the priority of the candidate frequency supporting the MBS service is low, for example, the lowest priority;

[0201] In the case where the number of candidate frequencies supporting the MBS service is 1, it is determined that the priority of the candidate frequency supporting the MBS service is high, for example, the highest priority;

[0202] In the case where the number of candidate frequencies supporting the MBS service is greater than 1, the priority of the candidate frequency is determined according to whether the candidate frequency supports the MBS service, and / or the relationship between the cell corresponding to the candidate frequency and the service area of the MBS service.

[0203] In an embodiment, the preset condition includes at least one of the following:

[0204] Pre-set condition 1: after entering the cell corresponding to the candidate frequency through the cell reselection process, being in the service area corresponding to the MBS service;

[0205] Specifically, if the UE is in the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process, it can be determined that the priority of the candidate frequency is the highest priority. For example, in FIG. 1, after entering Cell1, the UE is in the service area (A1), and it can be determined that the priority of f1 is high.

[0206] Pre-set condition 2: after entering the cell corresponding to the candidate frequency through the cell reselection process, the number of service areas corresponding to the MBS service reaches a first threshold;

[0207] Specifically, after the UE enters a cell corresponding to the candidate frequency through a cell reselection process, if the number of service areas in which the UE is located reaches a first threshold, the priority of the candidate frequency is the highest priority. The first threshold can be flexibly set according to actual needs. For example, when the first threshold is 1, the preset condition 2 is equivalent to the preset condition 1. For example, when the first threshold is 2, the number of service areas in which the UE is located is at least 2, and the priority of the corresponding candidate frequency is the highest priority. As shown in FIG. 4, after the UE enters Cell 2, the UE is located in two service areas (A2 and A3), and after the UE enters Cell 3, the UE is not located in any service area. It can be determined that the priority of f2 is the highest priority.

[0208] Precondition 3: After entering a cell corresponding to a candidate frequency through a cell reselection process, the area of a service area corresponding to an MBS service in which the UE is located is not less than a second threshold.

[0209] Specifically, after the UE enters a cell corresponding to the candidate frequency through a cell reselection process, if the area of the service area corresponding to the MBS service in which the UE is located reaches the second threshold, the priority of the candidate frequency is the highest priority. The second threshold can be flexibly set according to actual needs. For example, when the second threshold is 500 square kilometers, after the UE enters a cell corresponding to a candidate frequency through a cell reselection process, the area of the service area in which the UE is located is at least 500 square kilometers, and the priority of the corresponding candidate frequency is the highest priority.

[0210] Precondition 4: The number of service areas corresponding to MBS services in a cell corresponding to a candidate frequency reaches a third threshold.

[0211] Specifically, if the number of service areas in a cell corresponding to a candidate frequency reaches the third threshold, the priority of the candidate frequency is the highest priority. The third threshold can be flexibly set according to actual needs. For example, when the third threshold is 2, if a cell corresponding to a candidate frequency includes at least two service areas corresponding to MBS services, the priority of the candidate frequency is the highest priority.

[0212] Precondition 5: The area of a service area corresponding to an MBS service in a cell corresponding to a candidate frequency reaches a fourth threshold.

[0213] Specifically, if the area of a service area in a cell corresponding to a candidate frequency reaches the fourth threshold, the priority of the candidate frequency is the highest priority. The fourth threshold can be flexibly set according to actual needs. For example, when the fourth threshold is 500 square kilometers, if the area of a service area corresponding to an MBS service in a cell corresponding to a candidate frequency reaches 500 square kilometers, the priority of the candidate frequency is the highest priority.

[0214] It should be noted that the area of the service area can be an absolute area or a proportional area. If there are multiple service areas in a cell, the multiple service areas can be of the same MBS service or of different MBS services, and the multiple service areas can overlap or not overlap. In this case, the area of the service area corresponding to the MBS service in the cell can be the sum of the areas of the multiple service areas, the union of the areas of the multiple service areas, the average of the areas of the multiple service areas, the smallest area of the multiple service areas, the largest area of the multiple service areas, the weighted area of the multiple service areas, the area of the service area of the most important MBS service in the multiple service areas, the area of the service area closest to the UE in the multiple service areas, and the like.

[0215] Precondition 6: After entering the cell corresponding to the candidate frequency through the cell reselection process, the time length for reaching the service area corresponding to the MBS service does not exceed the fifth threshold value.

[0216] Specifically, after the UE enters the cell corresponding to the candidate frequency through cell reselection, the UE can not be immediately in the service area of the MBS service, and it can take a period of time to reach the service area of the MBS service. If the time length for reaching the service area of the MBS service does not exceed the fifth threshold value, the priority of the corresponding candidate frequency can be determined as the highest priority. The fifth threshold value can be flexibly set according to actual needs.

[0217] For example, the fifth threshold value is 2 minutes. For Cell x , if the time length for the UE to reach the service area after entering Cell x does not exceed 2 minutes, the priority of the corresponding candidate frequency f x is determined as the highest priority. If there are multiple service areas in Cell x , the shortest time length, the longest time length, the total time length, the average time length, the weighted time length, the time length for reaching the service area of the most important MBS service, and the like for the UE to reach each service area after entering Cell x can be used as the time length for the UE to reach the service area corresponding to the MBS service after entering Cell x .

[0218] Precondition 7: After entering the cell corresponding to the candidate frequency through the cell reselection process, the arrival time for reaching the service area corresponding to the MBS service is not later than the set time.

[0219] Specifically, after the UE enters the cell corresponding to the candidate frequency through cell reselection, the UE can not be immediately in the service area of the MBS service, and it can take a period of time to reach the service area of the MBS service. If the time length for reaching the service area of the MBS service does not exceed the fifth threshold, it can be determined that the priority of the corresponding candidate frequency is the highest priority. For example, the time is set to 12:00:00. For Cell x , if the arrival time of the UE reaching the service area after entering Cell x is not later than 12:00:00, it is determined that the priority of the corresponding candidate frequency f x is the highest priority. If there are multiple service areas in Cell x , the earliest arrival time, the longest arrival time, the average arrival time, the weighted arrival time, the arrival time of reaching the service area of the most important MBS service, or the like of the UE reaching each service area after entering Cell x may be taken as the arrival time of the UE reaching the service area after entering Cell x .

[0220] Preset condition 8: The distance between the position of the cell corresponding to the candidate frequency entered by the UE through the cell reselection process and the service area corresponding to the MBS service does not exceed the sixth threshold.

[0221] Specifically, if the distance between the position of the cell corresponding to the candidate frequency entered by the UE through the cell reselection process and the service area corresponding to the MBS service does not exceed the sixth threshold, it can be determined that the priority of the corresponding candidate frequency is the highest priority. The sixth threshold can be flexibly set according to actual needs. For example, the sixth threshold is 200 meters. For Cell x , if the distance between the UE and the service area after entering Cell x does not exceed 200 meters, it is determined that the priority of the corresponding candidate frequency f x is the highest priority. If there are multiple service areas in Cell x , the nearest distance, the farthest distance, the average distance, the weighted distance, the distance to the service area of the most important MBS service, or the distance to the nearest service area in each service area, or the like of the UE entering Cell x may be taken as the distance between the position of the cell corresponding to the candidate frequency entered by the UE through the cell reselection process and the service area corresponding to the MBS service.

[0222] Preset condition 9: After entering the cell corresponding to the candidate frequency through the cell reselection process, the length of stay in the service area corresponding to the MBS service is not less than the seventh threshold.

[0223] Specifically, if a UE, after entering the cell corresponding to a candidate frequency through cell reselection, spends at least the seventh threshold time within the service area corresponding to the MBS service, then the priority of the corresponding candidate frequency can be determined as the highest priority. The seventh threshold can be flexibly set according to actual needs.

[0224] For example, the seventh threshold is 10 minutes. For Cell... x If the UE enters the cell x If the dwell time within the service area corresponding to the MBS service is at least 10 minutes, then the Cell is determined. x The corresponding alternative frequency f x The priority is the highest. If Cell x If there are multiple service areas, the UE's shortest dwell time, longest dwell time, total dwell time, average dwell time, weighted dwell time, dwell time in the service area of ​​the most important MBS service, or dwell time in the nearest service area can be used as the UE's entry time into the cell. x The duration of stay within the business area corresponding to the MBS service.

[0225] Preset condition 10: After entering the cell corresponding to the candidate frequency through the cell reselection process, the time spent outside the service area corresponding to the MBS service does not exceed the eighth threshold.

[0226] Specifically, if a UE enters the cell corresponding to a candidate frequency through cell reselection, and its departure time outside the service area corresponding to the MBS service is not less than the eighth threshold, then the priority of the corresponding candidate frequency can be determined as the highest priority. The eighth threshold can be flexibly set according to actual needs.

[0227] For example, the eighth threshold is 5 minutes. For Cell... x If the UE enters the cell x If the time spent outside the business area corresponding to the MBS service does not exceed 5 minutes, then the Cell is determined. x The corresponding alternative frequency f x The priority is the highest. If Cell x If there are multiple service areas, the UE's shortest departure time, longest departure time, total departure time, average departure time, weighted departure time, and departure time in the service area of ​​the most important MBS service can be used as the UE's entry time into the cell. x The duration of absence when the customer is outside the business area corresponding to the MBS business.

[0228] The preset condition 11 is that, after entering the cell corresponding to the candidate frequency through the cell reselection procedure, the leaving area outside the service area corresponding to the MBS service is not more than a ninth threshold value.

[0229] Specifically, if, after the UE enters the cell corresponding to the candidate frequency through the cell reselection, the leaving area outside the service area corresponding to the MBS service is not less than the ninth threshold value, it can be determined that the priority of the corresponding candidate frequency is the highest priority. The ninth threshold value can be flexibly set according to actual needs.

[0230] For example, the ninth threshold value is 1000 square meters. For Cell x If the leaving area outside the service area corresponding to the MBS service after the UE enters Cell x is not more than 1000 square meters, it is determined that the priority of the candidate frequency f x corresponding to Cell x is the highest priority. If there are multiple service areas outside Cell x , the minimum leaving area, the maximum leaving area, the sum of the leaving areas, the union of the leaving areas, the average leaving area, the weighted leaving area, the leaving area in the service area of the most important MBS service, or the leaving area in the nearest service area, etc. of the UE in each service area can be used as the leaving area outside the service area corresponding to the MBS service after the UE enters Cell x .

[0231] In an embodiment, selecting a target frequency from the candidate frequencies includes: in the case that the number of candidate frequencies with the highest priority is 1, determining the target frequency as the candidate frequency with the highest priority; in the case that the number of candidate frequencies with the highest priority is greater than 1, determining a candidate frequency from the candidate frequencies with the highest priority as the target frequency.

[0232] Specifically, if there is only one candidate frequency with the highest priority, the candidate frequency with the highest priority can be used as the target frequency for receiving the MBS service or cell reselection, etc.; if there are multiple candidate frequencies with the highest priority, one can be selected as the target frequency according to actual needs, for example, one can be selected as the target frequency according to the preference of the UE, the designation of the user, the historical data of the UE for the MBS service, etc., or one can be randomly selected as the target frequency, etc.

[0233] It should be noted that if the service area of the MBS service covers all or part of at least two adjacent cells, such as cases 2-4 in FIG. 3, when determining the priority of the mandatory frequency for these adjacent cells, there may be a case where the priorities are the same. Taking case 3 in FIG. 3 as an example, the service area covers three cells, one of which is the cell where the UE is currently located, and the other two are adjacent cells. The relationship between these two adjacent cells and the service area of the MBS service may be the same, for example:

[0234] After the UE enters these two adjacent cells through the cell reselection process, it is immediately in the service area corresponding to the MBS service;

[0235] After the UE enters these two adjacent cells through the cell reselection process, the number of service areas corresponding to the MBS service may be the same, and the priority of the candidate frequency corresponding to the two adjacent cells may be the same;

[0236] After the UE enters these two adjacent cells through the cell reselection process, the area of the service area corresponding to the MBS service may be the same;

[0237] The number of service areas corresponding to the MBS service in the two adjacent cells may be the same;

[0238] The area of the service area corresponding to the MBS service in the two adjacent cells may be the same;

[0239] After entering these two adjacent cells through the cell reselection process, the time taken to reach the service area corresponding to the MBS service may be the same;

[0240] After entering these two adjacent cells through the cell reselection process, the arrival time of the service area corresponding to the MBS service may be the same;

[0241] After entering these two adjacent cells through the cell reselection process, it may be possible (or not possible) to reach the service area corresponding to the MBS service within a first set time;

[0242] The position of entering these two adjacent cells through the cell reselection process, and the distance between the corresponding cell and the service area corresponding to the MBS service;

[0243] After entering these two adjacent cells through the cell reselection process, the time spent in the service area corresponding to the MBS service may be the same;

[0244] After entering these two adjacent cells through the cell reselection process, it may be possible (or not possible) to be in the service area corresponding to the MBS service within a second set time;

[0245] The leaving time outside the service area corresponding to the MBS service after entering the two adjacent cells through the cell reselection procedure can be the same;

[0246] The leaving area outside the service area corresponding to the MBS service after entering the two adjacent cells through the cell reselection procedure can be the same;

[0247] The two adjacent cells are both part of or the whole area containing the service area corresponding to the MBS service;

[0248] Therefore, when the priority of the candidate frequencies corresponding to the two adjacent cells is determined by using one or more of the above relationships, if the relationship of the two adjacent cells is the same, the priority of the two candidate frequencies is the same, that is, there can be more than one mandatory frequency with the highest priority, in which case, one candidate frequency with the highest priority can be determined as the target frequency from the candidate frequencies with the highest priority.

[0249] In an embodiment, the method further comprises:

[0250] S100, receiving priority information issued by a network device, the priority information being used to indicate the priority of a candidate frequency.

[0251] Specifically, the network device can issue the priority information of the candidate frequency to the UE, for example, the network device can indicate the priority of the candidate frequency to the UE through a system message, dedicated signaling or an RRC release (RRC Release) message, etc., such as indicating that one or more candidate frequencies have a higher priority, one or more candidate frequencies have a lower priority, and / or the relative relationship of the priority of at least two candidate frequencies, etc. After the UE receives the priority information, it can further determine the priority of the candidate frequency according to whether the MBS service is supported and / or the service area of the MBS service, for example, for multiple candidate frequencies with a higher priority, it can further determine which candidate frequency or candidate frequencies have the highest priority, for multiple candidate frequencies with a lower priority, it can further determine which candidate frequency or candidate frequencies have the lowest priority, etc. On this basis, by indicating the priority information by the network device, the range of the candidate frequency whose priority needs to be determined can be further clarified, and the reliability of determining the priority can be improved.

[0252] Specifically, for the communication scenario as shown in FIG. 1, the method for determining the priority of the alternative frequency according to the present application can include: first, assuming that the system message acquired by the UE includes f1, f2 and f3, and the priority information of f1, f2 and f3 is indicated in the priority information acquired by the UE, therefore f1, f2 and f3 are available frequencies and can be used for cell reselection evaluation, further, since f3 cannot support MBS1, while f1 and f2 can support MBS1, the priority of f3 is low, and the priority of f1 and f2 is high. Further, since the UE can enter the service area of the MBS service immediately after entering Cell1 through the cell reselection process, while the UE cannot enter the service area of the MBS service immediately after entering Cell2 through the cell reselection process, therefore the priority of f1 is higher than the priority of f2, and the priority of the alternative frequency is determined.

[0253] In an embodiment, the number of MBS services is 1 or greater than 1; and any one MBS service corresponds to at least one service area.

[0254] Specifically, one MBS service can have one or more service areas, and the multiple service areas of one MBS service can be located in the same or different cells. Different service areas can be of the same MBS service or of different MBS services. Different service areas can correspond to different cells or different alternative frequencies. The service areas of different MBS services can overlap.

[0255] In an embodiment, the network corresponding to the MBS service is a non-terrestrial network.

[0256] In a non-terrestrial network, the services transmitted in different areas within the coverage of the network device can be different, different MBS services have their respective service areas, and the service areas of different MBS services can overlap. One cell can have one or more service areas of one MBS service, or service areas of multiple MBS services.

[0257] In an embodiment, the MBS service includes MBS broadcast service and / or MBS multicast service.

[0258] Specifically, the MBS service is mainly a point-to-multipoint service, service data can be transmitted from a single sender to multiple receivers, and the UE can be any UE in a broadcast service area or a UE in a multicast group. For an MBS service, there can be multiple UEs as receivers, and the priority of each UE for the alternative frequency can be different. Each UE can determine the priority of the alternative frequency according to one or two factors (whether the MBS service is supported and / or the relationship between the cell corresponding to the alternative frequency and the service area of the MBS service). The factors, relationships and / or preset conditions used by different UEs to determine the priority of the alternative frequency can be different, and can be flexibly selected according to actual needs.

[0259] FIG. 6 is a structural schematic diagram of a frequency priority determination apparatus provided by an embodiment of the present application. As shown in FIG. 6, the frequency priority determination apparatus provided by the embodiment of the present application comprises:

[0260] The priority determination module 210 is configured to determine the priority of the alternative frequency according to whether the MBS service is supported and / or the service area of the MBS service.

[0261] In an embodiment, the apparatus further comprises:

[0262] The selection module is configured to select a target frequency for receiving the MBS service according to the priority of the alternative frequency.

[0263] In an embodiment, the apparatus further comprises a selection module configured to perform cell reselection according to the priority of the alternative frequency, wherein the target cell of the cell reselection is a cell corresponding to a target frequency selected from the alternative frequency.

[0264] In an embodiment, the process of determining the priority of the alternative frequency according to whether the MBS service is supported and / or the service area of the MBS service comprises:

[0265] The priority of the alternative frequency supporting the MBS service is higher than the priority of the alternative frequency not supporting the MBS service.

[0266] In an embodiment, the process of determining the priority of the alternative frequency according to whether the MBS service is supported and / or the service area of the MBS service comprises:

[0267] For the alternative frequency not supporting the MBS service, the priority of the alternative frequency not supporting the MBS service is determined to be the lowest priority.

[0268] In an embodiment, the process of determining the priority of the alternative frequency according to whether the MBS service is supported and / or the service area of the MBS service comprises:

[0269] In a case that the number of the candidate frequencies supporting the MBS service is 1, the priority of the candidate frequency supporting the MBS service is determined as the highest priority.

[0270] In an embodiment, the process of determining the priority of the candidate frequency according to whether the MBS service is supported and / or the service area of the MBS service comprises:

[0271] determining the priority of the candidate frequency according to whether the MBS service is supported by the candidate frequency and / or the relationship between the cell corresponding to the candidate frequency and the service area of the MBS service;

[0272] The relationship between the cell corresponding to the candidate frequency and the service area of the MBS service comprises at least one of:

[0273] whether the UE is in the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process;

[0274] the number of the service areas corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process;

[0275] the area of the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process;

[0276] the number of the service areas corresponding to the MBS service in the cell corresponding to the candidate frequency;

[0277] the area of the service area corresponding to the MBS service in the cell corresponding to the candidate frequency;

[0278] the time length for reaching the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process;

[0279] the arrival time of the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process;

[0280] whether the UE can reach the service area corresponding to the MBS service within a first set time length after entering the cell corresponding to the candidate frequency through the cell reselection process;

[0281] the distance between the location of the cell corresponding to the candidate frequency entered through the cell reselection process and the service area corresponding to the MBS service;

[0282] the time length for staying in the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process;

[0283] after entering a cell corresponding to the candidate frequency through a cell reselection procedure, whether being in a service area corresponding to the MBS service within a second set time length;

[0284] after entering a cell corresponding to the candidate frequency through a cell reselection procedure, a leaving time length outside the service area corresponding to the MBS service;

[0285] after entering a cell corresponding to the candidate frequency through a cell reselection procedure, a leaving area outside the service area corresponding to the MBS service.

[0286] In an embodiment, the process of determining the priority of the candidate frequency according to whether the MBS service is supported and / or the service area of the MBS service includes:

[0287] determining the priority of the candidate frequency as the highest priority if the candidate frequency supports the MBS service and a relationship between a cell corresponding to the candidate frequency and the service area of the MBS service satisfies a preset condition.

[0288] In an embodiment, the preset condition includes at least one of:

[0289] after entering a cell corresponding to the candidate frequency through a cell reselection procedure, being in a service area corresponding to the MBS service;

[0290] after entering a cell corresponding to the candidate frequency through a cell reselection procedure, a number of service areas corresponding to the MBS service reached a first threshold;

[0291] after entering a cell corresponding to the candidate frequency through a cell reselection procedure, an area of a service area corresponding to the MBS service is not less than a second threshold;

[0292] a number of service areas corresponding to the MBS service in a cell corresponding to the candidate frequency reaches a third threshold;

[0293] an area of a service area corresponding to the MBS service in a cell corresponding to the candidate frequency reaches a fourth threshold;

[0294] after entering a cell corresponding to the candidate frequency through a cell reselection procedure, a time length for reaching a service area corresponding to the MBS service does not exceed a fifth threshold;

[0295] after entering a cell corresponding to the candidate frequency through a cell reselection procedure, a reaching time for reaching a service area corresponding to the MBS service is not later than a set time;

[0296] a distance between a location of entering a cell corresponding to the candidate frequency through a cell reselection procedure and a service area corresponding to the MBS service does not exceed a sixth threshold value;

[0297] a staying duration in the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection procedure is not less than a seventh threshold value;

[0298] a leaving duration out of the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection procedure does not exceed an eighth threshold value;

[0299] a leaving area out of the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection procedure does not exceed a ninth threshold value.

[0300] In an embodiment, selecting a target frequency from the candidate frequencies comprises:

[0301] in a case that the number of the highest priority candidate frequencies is 1, determining the target frequency as the highest priority candidate frequency;

[0302] in a case that the number of the highest priority candidate frequencies is greater than 1, determining a candidate frequency from the highest priority candidate frequencies as the target frequency.

[0303] In an embodiment, the apparatus further comprises a receiving module configured to receive priority information issued by a network device, the priority information being used to indicate a priority of a candidate frequency.

[0304] In an embodiment, the number of the MBS services is 1 or greater than 1;

[0305] any one of the MBS services corresponds to at least one service area.

[0306] In an embodiment, the network corresponding to the MBS service is a non-terrestrial network.

[0307] In an embodiment, the MBS service comprises an MBS broadcast service and / or an MBS multicast service.

[0308] The frequency priority determination apparatus provided by the embodiments of the present application can be used to execute the frequency priority determination method provided by any of the above embodiments, and has the corresponding functions and advantages.

[0309] The present application further provides a communication device comprising a processor and a memory, the memory being configured to store a computer program, the computer program being executed by the processor to enable the processor to implement the above frequency priority determination method.

[0310] The application further provides a computer readable storage medium comprising a computer program, which, when executed by a processor, causes the processor to implement the frequency priority determination method or the frequency priority determination method according to any of the embodiments.

[0311] The application further provides a computer program product comprising a computer program and / or instructions, which, when executed by a processor, implement the frequency priority determination method or the frequency priority determination method according to any of the embodiments.

[0312] In the above embodiments, the implementation can be achieved by software, hardware, firmware or any combination thereof. When implemented by software, the implementation can be achieved by computer program product in whole or in part. The computer program product comprises one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the whole or part of the processes or functions according to the embodiments of the application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (such as floppy disk, hard disk, magnetic tape), optical media (such as digital video disc (digital video disc, DVD)) or semiconductor media (such as solid state disk (solid state disk, SSD)) and the like.

[0313] Those skilled in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the application.

[0314] The above is only the preferred embodiment of the application, and is not intended to limit the embodiments and protection scope of the application. Those skilled in the art should be aware that any equivalent replacement and obvious changes made by using the contents of the specification and drawings should be included in the protection scope of the application.

Claims

1. A frequency priority determination method, characterized by, Comprise: Determine the priority of the candidate frequency according to whether the MBS service is supported and / or the service area of the MBS service.

2. The method of claim 1, wherein, Also comprise: Select a target frequency for receiving the MBS service according to the priority of the candidate frequency.

3. The method according to claim 1 or 2, characterized in that, Also comprise: Perform cell reselection according to the priority of the candidate frequency, wherein the target cell of the cell reselection is a cell corresponding to a target frequency selected from the candidate frequency.

4. The method of claim 1, wherein, The process of determining the priority of the candidate frequency according to whether the MBS service is supported and / or the service area of the MBS service, comprises: The priority of the candidate frequency supporting the MBS service is higher than that of the candidate frequency not supporting the MBS service.

5. The method of claim 1, wherein, The process of determining the priority of the candidate frequency according to whether the MBS service is supported and / or the service area of the MBS service, comprises: For the candidate frequency not supporting the MBS service, determine the priority of the candidate frequency not supporting the MBS service as the lowest priority.

6. The method of claim 1, wherein, The process of determining the priority of the candidate frequency according to whether the MBS service is supported and / or the service area of the MBS service, comprises: In the case that the number of candidate frequencies supporting the MBS service is 1, determine the priority of the candidate frequency supporting the MBS service as the highest priority.

7. The method of claim 1, wherein, The process of determining the priority of the candidate frequency according to whether the MBS service is supported and / or the service area of the MBS service, comprises: Determine the priority of the candidate frequency according to whether the candidate frequency is a frequency supporting the MBS service, and / or the relationship between the cell corresponding to the candidate frequency and the service area of the MBS service; The relationship between the cell corresponding to the candidate frequency and the service area of the MBS service comprises at least one of the following: Whether in the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process; The number of service areas corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process; The area of the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process; The number of service areas corresponding to the MBS service in the cell corresponding to the candidate frequency; The area of the service area corresponding to the MBS service in the cell corresponding to the candidate frequency; The time length for reaching the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process; The arrival time of the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process; Whether the service area corresponding to the MBS service can be reached within a first set time length after entering the cell corresponding to the candidate frequency through the cell reselection process; The distance between the position of the cell corresponding to the candidate frequency entered through the cell reselection process and the service area corresponding to the MBS service; The stay time in the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process; whether to be in the service area corresponding to the MBS service within a second set time length after entering the cell corresponding to the candidate frequency through the cell reselection process; a leaving time length outside the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process; a leaving area outside the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process; whether the cell corresponding to the candidate frequency contains part or all of the service area corresponding to the MBS service.

8. The method of claim 1, wherein, The process of determining the priority of the candidate frequency according to whether the MBS service is supported and / or the service area of the MBS service includes: determining the priority of the candidate frequency as the highest priority if the candidate frequency supports the MBS service and the relationship between the corresponding cell and the service area of the MBS service meets a preset condition.

9. The method of claim 7, wherein, The preset condition includes at least one of: being in the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process; the number of service areas corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process reaches a first threshold; the area of the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process is not less than a second threshold; the number of service areas corresponding to the MBS service in the cell corresponding to the candidate frequency reaches a third threshold; the area of the service area corresponding to the MBS service in the cell corresponding to the candidate frequency reaches a fourth threshold; the time length for reaching the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process does not exceed a fifth threshold; the arrival time for reaching the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process is not later than a set time; the distance between the position of entering the cell corresponding to the candidate frequency through the cell reselection process and the service area corresponding to the MBS service does not exceed a sixth threshold; the staying time length in the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process is not less than a seventh threshold; the leaving time length outside the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process does not exceed an eighth threshold; the leaving area outside the service area corresponding to the MBS service after entering the cell corresponding to the candidate frequency through the cell reselection process does not exceed a ninth threshold.

10. The method of claim 2, wherein, Selecting a target frequency from the candidate frequency includes: In the case where the number of candidate frequencies with the highest priority is 1, determining the target frequency as the candidate frequency with the highest priority. In the case where the number of candidate frequencies with the highest priority is greater than 1, determining a candidate frequency from the candidate frequencies with the highest priority as the target frequency.

11. The method of claim 1, wherein, Further includes: Receive priority information sent by a network device, the priority information being used to indicate a priority of a candidate frequency.

12. The method of claim 1, wherein, The number of MBS services is 1 or greater than 1. Any one of the MBS services corresponds to at least one service area.

13. The method of claim 1, wherein, The network corresponding to the MBS service is a non-ground network.

14. The method of claim 1, wherein, The MBS service includes an MBS broadcast service and / or an MBS multicast service.

15. A frequency priority determination apparatus characterized by comprising: Comprise: A priority determination module, configured to determine a priority of a candidate frequency according to whether an MBS service is supported and / or a service area of the MBS service. 16.A communication device, comprising a processor and a memory, the memory being configured to store a computer program, the computer program being executed by the processor to enable the processor to implement the information receiving method according to any one of claims 1-14. 17.A computer readable storage medium, comprising a computer program, the computer program being executed by a processor to enable the processor to implement the method according to any one of claims 1-14.

Images