MCCH sending method and apparatus, MCCH receiving method and apparatus, and base station, terminal and storage medium

Abstract

Disclosed in the present application are an MCCH sending method and apparatus, an MCCH receiving method and apparatus, and a base station, a terminal and a storage medium. The MCCH sending method comprises: generating indication information, which is used for indicating whether MCCH information has changed; and sending the indication information. In the technical solution, indication information is sent to a UE to effectively indicate whether MCCH information has changed, such that the UE can explicitly determine, on the basis of the indication information, whether the MCCH information has changed. Therefore, a basis can be provided for determining whether to receive the MCCH information, such that power waste of the UE can be avoided, thereby improving the performance and user experience of the UE.

Description

MCCH transmission and reception methods, devices, base stations, terminals and storage media Technical Field

[0001] This application relates to the field of communication technology, and in particular to an MCCH transmission and reception method, apparatus, base station, terminal and storage medium. Background Technology

[0002] Although 5G has begun commercial use, its coverage in remote ocean and land areas is limited by geographical conditions and business models. To overcome these terrain limitations, integrating satellite communication with terrestrial networks to create a seamless global, integrated air-sea-ground network has become a research hotspot in academia and industry. International organizations such as 3GPP and ITU have established working groups to conduct standardization research on satellite-terrestrial integration. Among these, the 3GPP project on Non-terrestrial Networks (NTN) focuses on integrating satellite communication with 5G, addressing key issues in New Radio (NR) support for NTN. Its standardization work will lay the technological foundation for 6G satellite-terrestrial integration research. Future integrated air-space-ground networks will primarily focus on deep integration, combining diverse communication platforms to provide broader and more diversified communication services.

[0003] In NTN, MBS services can be associated with service areas. If a user equipment (UE) is within the service area corresponding to a particular MBS service of interest, it can receive that MBS service; if the UE is not within the service area corresponding to that MBS service, it cannot receive that MBS service.

[0004] However, in existing technical research, if an MCCH change notification indicates a change in MCCH information, the UE, unaware of whether the service area corresponding to one or more MBS services of interest has changed, will need to receive the latest MCCH information to determine if it is currently within the service area corresponding to that MBS service. If, after receiving the MCCH information, it is found that the UE is not within the service area corresponding to any of the MBS services of interest, then receiving the MCCH information is meaningless, resulting in wasted UE power and reduced UE performance and user experience. Summary of the Invention

[0005] To address the aforementioned problem of not being able to effectively indicate whether MCCH information has changed, this application provides an MCCH transmission and reception method, apparatus, base station, terminal, and storage medium.

[0006] This application provides an MCCH transmission method, including:

[0007] Generate indication information, which is used to indicate whether the MCCH information has been changed;

[0008] Send the instruction information.

[0009] This application provides an MCCH transmission method, including:

[0010] Generate an MCCH change notification, which indicates whether the MCCH information has been changed.

[0011] Send the MCCH change notification.

[0012] This application provides an MCCH receiving method, including:

[0013] Receive indication information, which indicates whether the MCCH information has been changed.

[0014] This application provides an MCCH receiving method, including:

[0015] Receive MCCH change notification, which indicates whether the MCCH information has been changed.

[0016] This application provides an MCCH transmitting device, including:

[0017] The generation module is used to generate indication information, which indicates whether the MCCH information has been changed;

[0018] The sending module sends the instruction information.

[0019] This application provides an MCCH transmitting device, including:

[0020] The generation module is used to generate MCCH change notifications, which indicate whether MCCH information has been changed.

[0021] The sending module is used to send the MCCH change notification.

[0022] This application provides an MCCH receiving device, including:

[0023] A receiving module is used to receive indication information, which indicates whether the MCCH information has been changed.

[0024] This application provides an MCCH receiving device, including:

[0025] A receiving module is used to receive MCCH change notifications, which indicate whether MCCH information has been changed.

[0026] This application provides a base station, including:

[0027] One or more processors;

[0028] Storage device for storing one or more programs;

[0029] When the one or more programs are executed by the one or more processors, the one or more processors implement the MCCH sending method described above.

[0030] This application provides a terminal, including:

[0031] One or more processors;

[0032] Storage device for storing one or more programs;

[0033] When the one or more programs are executed by the one or more processors, the one or more processors implement the MCCH receiving method described above.

[0034] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the MCCH transmission method or MCCH reception method described above.

[0035] This application provides an MCCH transmission and reception method, apparatus, base station, terminal, and storage medium. The MCCH transmission method includes generating indication information to indicate whether MCCH information has been changed; and transmitting the indication information. This technical solution effectively indicates to the UE whether MCCH information has changed by transmitting the indication information, enabling the UE to clearly understand whether the MCCH information has changed based on the indication information. This provides a basis for determining whether to receive MCCH information, thereby avoiding power waste by the UE and improving UE performance and user experience. Attached Figure Description

[0036] The features, advantages, and aspects of the embodiments disclosed in this application will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0037] Figure 1 is a flowchart illustrating an MCCH transmission method according to an embodiment of this application;

[0038] Figure 2 is a schematic diagram showing the relationship between the MCCH modification period and the repetition period provided in an embodiment of this application;

[0039] Figure 3 is a flowchart illustrating an MCCH transmission method according to another embodiment of this application;

[0040] Figure 4 is a schematic diagram showing the relationship between the business area modification cycle and the MCCH modification cycle provided in an embodiment of this application;

[0041] Figure 5 is a flowchart illustrating an embodiment of the MCCH receiving method provided in this application;

[0042] Figure 6 is a flowchart illustrating an MCCH receiving method according to another embodiment of this application;

[0043] Figure 7 is a schematic diagram of the structure of an MCCH transmitting device provided in an embodiment of this application;

[0044] Figure 8 is a schematic diagram of the MCCH transmitting device provided in another embodiment of this application;

[0045] Figure 9 is a schematic diagram of the structure of an MCCH receiving device provided in an embodiment of this application;

[0046] Figure 10 is a schematic diagram of the structure of an MCCH receiving device provided in another embodiment of this application. Detailed Implementation

[0047] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present application, not the entire structure.

[0048] Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the steps as sequential processes, many of these steps can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the steps can be rearranged. The process can be terminated when its operation is complete, but may also have additional steps not included in the figures. The process can correspond to a method, function, procedure, subroutine, subroutine, etc.

[0049] Furthermore, the embodiments and features described in this application may be combined with each other, unless otherwise specified.

[0050] MBS services include broadcast, multicast, and multicast services. Taking multicast as an example, multicast services can be transmitted using a point-to-multipoint (PTM) method, which allows data transmission at a relatively low data bit rate. Network nodes can transmit MBS services to multiple UEs, which is more beneficial for saving network resources when the number of receiving UEs is large.

[0051] In existing technologies, access network equipment in non-terrestrial networks has a very large coverage area, but different areas within that coverage area may require different services. Since the UE (User Equipment) is unaware of whether the service area corresponding to its interested MBS (Mobile Service Provider) has changed, the UE needs to receive the latest MCCH (Multi-Channel Clock) information to determine if it is currently within the service area corresponding to a particular MBS service of interest. If, after receiving the MCCH information, it is found that the UE is not within the service area corresponding to any interested MBS service, then receiving the MCCH information is meaningless, resulting in wasted UE power.

[0052] An exemplary application scenario is as follows: Consider an MBS service in a communication system, denoted as MBS1, where the service area corresponding to MBS1 is service area 1. Assume the MBS service the UE is interested in is MBS1, and that the UE is outside service area 1. If the MCCH information changes, the UE does not know whether the change includes a change in the service area corresponding to MBS1. For example, if the service area corresponding to MBS1 changes to both service area 1 and service area 2, the UE needs to receive the latest MCCH information to know that the service area corresponding to MBS1 has changed. If the change in the MCCH information does not include a change in the service area corresponding to MBS1 (i.e., the service area corresponding to MBS1 has not changed), then receiving MCCH information outside service area 1 is meaningless for the UE. This results in wasted UE power, thereby reducing UE performance and user experience.

[0053] This application provides a method, apparatus, base station, terminal, and storage medium for transmitting and receiving MCCH. For MBS services, the base station indicates to the UE whether the MCCH information has been changed. Based on this, the UE can clearly determine whether the MCCH information has changed or not based on the indication information, providing a basis for determining whether to receive the MCCH information, thereby avoiding power waste by the UE and improving UE performance and user experience.

[0054] The user equipment (UE) in this application embodiment can be referred to as a terminal, such as a mobile terminal or an in-vehicle terminal. The UE includes any device that provides voice and / or data connectivity to the user, such as wireless terminal devices, mobile terminal devices, device-to-device (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 UE, reduced-capability UE (REDCAP UE), subscriber unit, subscriber station, mobile station, remote station, access point (AP), remote terminal, access terminal, user terminal, user agent, or user device, etc. It can also be user equipment in future communication systems, but this patent is not limited to this.

[0055] The base station in this application embodiment can be a base station in a terrestrial communication network or a base station in an NTN network. For example, it can be an evolved NodeB (eNB), a next-generation node (gNB) in an NR system, a roadside unit (RSU), a centralized unit (CU) and a distributed unit (DU) in a cloud access network system, or an access network device in a future communication system. This application is not limited to these.

[0056] This application provides an MCCH transmission method, which is applicable to MCCH transmission scenarios. Specifically, this MCCH transmission method can be executed by an MCCH transmission device, which can be implemented in software and / or hardware and integrated into the base station.

[0057] Figure 1 is a schematic flowchart of an MCCH transmission method provided in an embodiment of this application. The MCCH transmission method provided in this embodiment may include the following steps:

[0058] S110. Generate indication information, which is used to indicate whether the MCCH information has been changed;

[0059] S120, Send instruction information.

[0060] In one embodiment, whether the MCCH information has changed includes whether the service area corresponding to the MBS service has changed.

[0061] In one embodiment, the service area may include the area covered by the transmitting device under the NTN network connection, or the area within an NTN cell covered by the transmitting device under the NTN network connection. The service area within an NTN cell may be one or more.

[0062] In scenarios involving multiple services and multiple service areas, the information indicated by the instruction message allows the UE to clearly determine whether the service area corresponding to the MBS service has changed. For example, the instruction message can indicate whether the service area corresponding to at least one MBS service has changed. Therefore, in NTN communication scenarios, enabling the UE to clearly determine whether the service area corresponding to the MBS service has changed provides a basis for determining whether to receive MCCH information, thereby avoiding power waste by the UE and improving UE performance and user experience.

[0063] In an exemplary application scenario: Consider an MBS service in a communication system, denoted as MBS1, where the service area corresponding to MBS1 is service area 1. Assume the MBS service the UE is interested in is MBS1, and that the UE is outside service area 1. The UE can determine whether the service area corresponding to MBS1 has changed based on indication information. If the service area corresponding to MBS1 has changed, the UE can receive MCCH information; if the service area corresponding to MBS1 has not changed, the UE can choose not to receive MCCH information, thereby avoiding power waste and improving UE performance and user experience.

[0064] It is important to note that a communication system can have one or more MBS services. The indication information can be a concept specific to a single MBS service; for example, an indication information could indicate whether the service area corresponding to an MBS service has changed. Alternatively, the indication information can be a concept specific to multiple MBS services; for example, an indication information could indicate whether the service areas corresponding to multiple MBS services have changed.

[0065] It should also be noted that a communication system can have one or more MBS service areas, and the indication information can be an information concept specific to a single service area. For example, an indication information can indicate whether a service area corresponding to an MBS service has changed. Alternatively, the indication information can be an information concept specific to multiple service areas. For example, an indication information can indicate whether multiple service areas corresponding to an MBS service have changed. Therefore, a communication system can contain multiple pieces of indication information.

[0066] It should be noted that the correspondence between MBS services and service areas can be that one MBS service corresponds to multiple service areas, or one service area corresponds to multiple MBS services.

[0067] The indication information may be associated with an MBS service list, which indicates at least one MBS service and the service area corresponding to each MBS service.

[0068] As an example, there are three MBS services in a communication system: MBS1, MBS2 and MBS3. The indication information can indicate the following: the service area corresponding to MBS1 is Area1, the service areas corresponding to MBS2 are Area2 and Area3, and the service area corresponding to MBS3 is Area3.

[0069] For example, the MBS business list is in the following form:

[0070] MBS1

[0071] Area 1

[0072] MBS2

[0073] Area 2, Area 3

[0074] MBS3

[0075] Area 3

[0076] The instruction information may be associated with a list of business areas, which indicates at least one business area and the MBS service corresponding to each business area.

[0077] As an example, a communication system has three service areas: Area1, Area2, and Area3. The indication information can indicate the following: the MBS service corresponding to Area1 is MBS1, the MBS service corresponding to Area2 is MBS2, and the MBS services corresponding to Area3 are MBS2 and MBS3.

[0078] For example, the list of business areas may take the following form:

[0079] Area 1

[0080] MBS1

[0081] Area2

[0082] MBS2

[0083] Area 3

[0084] MBS2, MBS3

[0085] In one embodiment, the service area corresponding to the MBS service includes one of the following:

[0086] The entire area of ​​an NTN cell;

[0087] A portion of an NTN cell;

[0088] The entire area of ​​multiple NTN cells;

[0089] A portion of each NTN cell in multiple NTN cells;

[0090] The entire area of ​​at least one NTN cell and a portion of the area of ​​at least one NTN cell.

[0091] In this embodiment, the service area of ​​MBS service can be flexibly set according to actual conditions. Specifically, the service area of ​​MBS service can be the entire area of ​​an NTN cell; it can be a part of an NTN cell; it can be the entire area of ​​multiple NTN cells; it can be a part of each of multiple NTN cells; or it can be the entire area of ​​at least one NTN cell and a part of at least one NTN cell.

[0092] In one embodiment, the transmitting device for sending indication information can be a base station in an NTN network, including transparent base stations, regenerate base stations, and other types of base stations. The base station can be mounted on non-ground or airborne equipment, for example, it can be located on a satellite, space station, or other spacecraft.

[0093] In one embodiment, the indication information may be included in the MCCH change notification; or the indication information may be included in the DCI; or the indication information may be included in the system message; or the indication information may be included in the MCCH; or the indication information may be included in the NAS message; or the indication information may be included in the AS message; or the indication information may be included in the RRC layer signaling; or the indication information may be included in the SDAP layer signaling; or the indication information may be included in the PDCP layer signaling; or the indication information may be included in the RLC layer signaling; or the indication information may be included in the MAC layer signaling; or the indication information may be included in the PHY layer signaling; or the indication information may be included in other messages.

[0094] For example, system messages can carry MBS system information blocks, NTN system message blocks, or instruction information.

[0095] Furthermore, the indication information can be included in the MBS system information block carried by the system message. For example, the indication information can be included in the MBS configuration information in the MBS system information block, in the NTN system message block carried by the system message, or in a dedicated system message block carried by the system message. The dedicated system message block is dedicated to carrying the indication information, and it can also be included in other system message blocks carried by the system message.

[0096] The indication information in this embodiment can be 1 bit or multiple bits. When the indication information is set to a first value, it indicates that the service area corresponding to the MBS service has changed; when the indication information is set to a second value, it indicates that the service area corresponding to the MBS service has not changed.

[0097] In this embodiment, the first value can be 1 or 0, and the second value can be 0 or 1. For example, when the indication information is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the indication information is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0098] Alternatively, when the indication information is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the indication information is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0099] In one embodiment, the indication information may be included in the MCCH change notification, which indicates whether the MCCH information has changed. Specifically, a change in MCCH information includes at least one of the following: the commencement of a new MBS service, a change not caused by the commencement of a new MBS service, or a change in the service area corresponding to the MBS service.

[0100] Furthermore, changes not caused by the commencement of a new MBS service may include: a change in the service area of ​​the MBS service.

[0101] Furthermore, changes not caused by the start of a new MBS service can include: changes to MBS session configuration, termination of an MBS session, and changes to neighboring cells.

[0102] Furthermore, changes to the MBS session configuration may include changes to the service area of ​​the MBS service.

[0103] For example, the MBS session configuration includes the service area of ​​the MBS service, so changes to the MBS session configuration can include changes to the service area of ​​the MBS service.

[0104] For example, a change to the neighboring cell list could be a change to the neighboring cell list, which contains neighboring cells that can transmit one or more broadcast services and / or multicast services in the current cell. A change to the neighboring cell list could be made to change neighboring cells that previously could transmit one or more broadcast services in the current cell to neighboring cells that do not transmit one or more broadcast services in the current cell.

[0105] For example, changes to neighboring cells can be made to the neighboring cell assignment in the MBS service configuration information. For instance, for a certain MBS service, a neighboring cell in the neighboring cell list that was previously able to transmit the MBS service may now be changed to be unable to transmit the MBS service, or vice versa.

[0106] For example, changes to neighboring cells can be changes to the regional geographic location information of neighboring cells; regional geographic location information can include circular region information, and / or polygonal region information and / or other types of region information. Circular region information includes: reference location information and / or radius; polygonal region information includes: shape and / or latitude and longitude of vertices and / or boundary line location information.

[0107] The MCCH change notification in this application embodiment may include a first instruction, and / or a second instruction, and / or a third instruction, and / or a fourth instruction.

[0108] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; the third indication information is used to indicate whether the service area corresponding to the MBS service has changed; and the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service, and / or to indicate whether the service area corresponding to the MBS service has changed.

[0109] In one embodiment, the MCCH change notification may include a first instruction message, a second instruction message, and a third instruction message.

[0110] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; and the third indication information is used to indicate whether the service area corresponding to the MBS service has changed.

[0111] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0112] When the second indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0113] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0114] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1.

[0115] For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0116] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0117] Furthermore, in the embodiments of this application, the first value of the second indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to 0, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0118] Alternatively, when the second indication information is set to 0, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to 1, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0119] Furthermore, in this embodiment, the first value of the third indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0120] Alternatively, when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0121] For example, MCCH change notifications are transmitted via a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The second indication information in the 3-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service; for example, a configuration change in an ongoing MBS session(s), the termination of an MBS session(s), or changes to neighbor cell information. The third indication information in the 3-bit bitmap, when set to 1, indicates a change in the service area of ​​the MBS service.

[0122] In one embodiment, the MCCH change notification may include a first instruction message and a fourth instruction message.

[0123] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; or to indicate whether the service area corresponding to the MBS service has changed; or to indicate whether a change has occurred that is not caused by the start of a new MBS service and whether the service area corresponding to the MBS service has changed.

[0124] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0125] When the fourth indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; or that the service area corresponding to the MBS service has changed; or that a change has occurred that was not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0126] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0127] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0128] Furthermore, in this embodiment, the first value of the fourth indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0129] Alternatively, when the fourth indication information is set to 0, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 1, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0130] For example, MCCH change notifications are transmitted via a 2-bit bitmap. The first indication information in the 2-bit bitmap (e.g., the MSB bit), when set to 1, indicates the commencement of a new MBS service. The fourth indication information in the 2-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the commencement of a new MBS service, and / or indicates a change in the service area of ​​the MBS service.

[0131] In one embodiment, the MCCH change notification may include a first instruction message, a fourth instruction message, and a third instruction message.

[0132] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; or to indicate whether the service area corresponding to the MBS service has changed; or to indicate whether a change has occurred that is not caused by the start of a new MBS service and whether the service area corresponding to the MBS service has changed; the third indication information is used to indicate whether the service area corresponding to the MBS service has changed.

[0133] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0134] When the fourth indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; or that the service area corresponding to the MBS service has changed; or that a change has occurred that was not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0135] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0136] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0137] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0138] Furthermore, in this embodiment, the first value of the fourth indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0139] Alternatively, when the fourth indication information is set to 0, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 1, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0140] Furthermore, in this embodiment, the first value of the third indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0141] Alternatively, when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0142] For example, MCCH change notifications are transmitted via a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The fourth indication information in the 3-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service; for example, a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or changes to neighbor cell information. The third indication information in the 3-bit bitmap, when set to 1, indicates a change in the service area of ​​the MBS service.

[0143] The MCCH change notification in this application embodiment may include first instruction information and / or second instruction information.

[0144] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service.

[0145] The second indication information indicates whether a change has occurred that is not caused by the start of a new MBS service, and may include a change in the service area corresponding to the MBS service.

[0146] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0147] When the second indication information is set to the first value, it indicates a change not caused by the start of a new MBS service, such as a change in MBS session configuration, termination of an MBS session, change of service in a neighboring cell, change of service area corresponding to the MBS service, or change of service area corresponding to the MBS service in the MBS session configuration. When the second indication information is set to the second value, it indicates no change not caused by the start of a new MBS service.

[0148] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0149] Specifically, in the embodiments of this application, the first value of the second indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; when the second indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service.

[0150] For example, MCCH change notifications are transmitted via a 2-bit bitmap. The first indication information in the 2-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The second indication information in the 2-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service. For example, a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or a change in neighbor cell information. Configuration changes of MBS sessions(s) include indications of changes in the service area of ​​the MBS service, again for example, a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or changes in neighbor cell information, or a change in the service area of ​​the MBS service.

[0151] In one embodiment, during the process of sending the MCCH change notification, the MCCH change notification can be sent starting from the beginning of the MCCH modification period.

[0152] In one embodiment, the same MCCH information can be transmitted multiple times within a single MCCH modification period. Specifically, an MCCH modification period may include multiple repeating periods, and different repeating periods within an MCCH modification period transmit the same MCCH information. In the field of mobile communications, in LTE systems, the MCCH (Multimedia Broadcast Multicast Control Channel) is a channel used to transmit control information related to MBMS (Multimedia Broadcast Multicast Service); in 5G NR systems, the MCCH (Multicast / Broadcast Control Channel) is a channel used to transmit control information related to MBS (Multicast / Broadcast Service). The MCCH modification period refers to the frequency at which information is updated or changed on this channel.

[0153] In one embodiment, a single MCCH modification period can contain multiple repetition periods. Figure 2 is a schematic diagram illustrating the relationship between the MCCH modification period and the repetition period according to an embodiment of this application. As shown in Figure 2, Figure 2 uses an MCCH modification period containing four repetition periods as an example. This is because information on the MCCH may need to be broadcast multiple times over a period of time to ensure that all interested users can receive this control information. This can improve the reception success rate, especially in mobile environments where some users may not be able to successfully receive the information on the MCCH in one go due to changes in signal strength. Within each repetition period, the MCCH carries the same control information until the start of the next MCCH modification period, at which point new or updated information may need to be broadcast to the user. This mechanism helps ensure that relevant control information of the MBMS service can be effectively conveyed to end users even in harsh wireless environments.

[0154] In one embodiment, MCCH change notifications may be carried by the Physical Downlink Control Channel (PDCCH).

[0155] When the network changes (partially) the MCCH information, the network will inform the UE of this change through the PDCCH starting from the beginning of the MCCH modification period. The PDCCH is the PDCCH that schedules the MCCH in each repetition period of this MCCH modification period.

[0156] Taking the MCCH transmission and reception method in LTE as an example, the SC-PTM in LTE adopts a two-level scheduling mechanism. SIB20 indicates the scheduling information of the SC-MCCH channel, including: modification period, repetition period, offset, first subframe, and the possible scheduling duration. In a subframe within the duration interval, the base station maps MBMS control / scheduling information onto PDSCH resources, maps downlink control information scheduling the PDSCH resources onto PDCCH resources, and scrambles the PDCCH using SC-RNTI. Specifically, the SC-MCCH carries the control information of the MBMS service, including the service identifier (TMGI), SC-MTCH scheduling information, etc. One SC-MTCH carries one MBMS service data. The SC-MTCH scheduling information may include: scheduling period, offset, the time interval length of the possible scheduling duration (OnDurationTimer), and the waiting time for the UE after successfully receiving downlink data (drxInactivityTimerSCPTM). The eNB uses G-RNTI to scramble the DCI of the PDCCH that schedules the SC-MTCH. Each MBMS service is allocated a separate G-RNTI. For each MBS service, in a certain subframe within the duration interval, the base station maps the MBS service data to the PDSCH resources, maps the downlink control information scheduling the PDSCH resources to the PDCCH resources, and scrambles the PDCCH with the corresponding G-RNTI. The MCCH transmission and reception method in 5G NR also adopts a two-level scheduling mechanism, similar to the MCCH transmission and reception method in LTE, and will not be elaborated here.

[0157] In one embodiment, MBS services may include multicast and / or broadcast services that can be received by terminals in RRC connected state and / or RRC inactive state and / or RRC idle state.

[0158] As an example, for a multicast service that can be received by a UE in the RRC connected state (RRC_CONNECTED), the UE can receive the multicast service in the service area corresponding to the multicast service based on the MBS configuration information when in the RRC_CONNECTED state, according to the indication information.

[0159] As an example, for a multicast service that can be received by a UE in the RRC inactive state (RRC_INACTIVE), the UE can receive the multicast service based on the MBS configuration information in the service area corresponding to the multicast service when in the RRC_INACTIVE state, according to the indication information.

[0160] As an example, for broadcast services that can be received by a UE in the RRC_CONNECTED, RRC_INACTIVE, or RRC_IDLE state, the UE can receive the broadcast service based on the MBS configuration information in the service area corresponding to the broadcast service when it is in the RRC_CONNECTED, RRC_INACTIVE, or RRC_IDLE state, according to the indication information.

[0161] This application provides another MCCH transmission method, which is applicable to MCCH transmission scenarios. Specifically, this MCCH transmission method can be executed by an MCCH transmission device, which can be implemented in software and / or hardware and integrated into the base station.

[0162] Figure 3 is a flowchart illustrating an MCCH transmission method according to another embodiment of this application. The MCCH transmission method provided in this embodiment may include the following steps:

[0163] S310. Generate an MCCH change notification. The MCCH change notification is used to indicate whether the MCCH information has been changed.

[0164] S320, Send MCCH change notification.

[0165] In one embodiment, changes in MCCH information include changes in the service area corresponding to the MBS service.

[0166] MCCH change notification refers to the notification sent by the network to the UE when MCCH information changes. This notification mechanism ensures that the UE is promptly informed of the latest MBMS updates, thereby guaranteeing that users can smoothly receive and use MBMS services. When the coverage area of ​​MBMS services changes, such as the addition of a new service area or the discontinuation of services in certain areas, the MCCH information is updated, and the corresponding MCCH change notification is sent. After receiving this notification, the UE can reassess whether it is within a valid service area and decide whether to continue receiving the service. In addition to changes in service areas, MCCH change notifications may also include updates to Quality of Service (QoS) parameters, the start or discontinuation of new services, and other information. This information will affect how efficiently users can utilize MBMS services.

[0167] In an exemplary application scenario: Consider an MBS service in a communication system, denoted as MBS1, where the service area corresponding to MBS1 is service area 1. Assume the MBS service the UE is interested in is MBS1, and that the UE is outside service area 1. The UE can determine whether the service area corresponding to MBS1 has changed based on indication information. If the service area corresponding to MBS1 has changed, the UE can receive MCCH information; if the service area corresponding to MBS1 has not changed, the UE can choose not to receive MCCH information, thereby avoiding power waste and improving UE performance and user experience.

[0168] In one embodiment, the MCCH change notification can indicate whether the service area corresponding to the MBS service has changed using 1 bit or multiple bits.

[0169] In one instance, when the at least one bit is set to a first value, it indicates that the service area corresponding to the MBS service has changed; when the at least one bit is set to a second value, it indicates that the service area corresponding to the MBS service has not changed.

[0170] In the embodiments of this application, the first value can be 1 or 0, and the second value can be 0 or 1. For example, when the at least 1 bit is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the at least 1 bit is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0171] Alternatively, when at least one bit is set to 0, it indicates that the service area corresponding to the MBS service has changed; when at least one bit is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0172] In one embodiment, the MCCH change notification is used to indicate whether the MCCH information has changed. Specifically, a change in the MCCH information includes at least one of the following: the commencement of a new MBS service, a change not caused by the commencement of a new MBS service, or a change in the service area corresponding to the MBS service.

[0173] Furthermore, changes not caused by the commencement of a new MBS service may include: a change in the service area of ​​the MBS service.

[0174] Furthermore, changes not caused by the start of a new MBS service can include: changes to MBS session configuration, termination of an MBS session, and changes to neighboring cells.

[0175] Furthermore, changes to the MBS session configuration may include changes to the service area of ​​the MBS service.

[0176] For example, the MBS session configuration includes the service area of ​​the MBS service, so changes to the MBS session configuration can include changes to the service area of ​​the MBS service.

[0177] The MCCH change notification in this application embodiment may include a first instruction, and / or a second instruction, and / or a third instruction, and / or a fourth instruction.

[0178] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; the third indication information is used to indicate whether the service area corresponding to the MBS service has changed; and the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service, and / or to indicate whether the service area corresponding to the MBS service has changed.

[0179] In one embodiment, the MCCH change notification may include a first instruction message, a second instruction message, and a third instruction message.

[0180] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; and the third indication information is used to indicate whether the service area corresponding to the MBS service has changed.

[0181] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0182] When the second indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0183] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0184] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0185] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0186] Furthermore, in the embodiments of this application, the first value of the second indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to 0, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0187] Alternatively, when the second indication information is set to 0, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to 1, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0188] Furthermore, in this embodiment, the first value of the third indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0189] Alternatively, when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0190] For example, MCCH change notifications are transmitted via a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The second indication information in the 3-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service; for example, a configuration change in an ongoing MBS session(s), the termination of an MBS session(s), or changes to neighbor cell information. The third indication information in the 3-bit bitmap, when set to 1, indicates a change in the service area of ​​the MBS service.

[0191] In one embodiment, the MCCH change notification may include a first instruction message and a fourth instruction message.

[0192] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; or to indicate whether the service area corresponding to the MBS service has changed; or to indicate whether a change has occurred that is not caused by the start of a new MBS service and whether the service area corresponding to the MBS service has changed.

[0193] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0194] When the fourth indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; or that the service area corresponding to the MBS service has changed; or that a change has occurred that was not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0195] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0196] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0197] Furthermore, in this embodiment, the first value of the fourth indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0198] Alternatively, when the fourth indication information is set to 0, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 1, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0199] For example, MCCH change notifications are transmitted via a 2-bit bitmap. The first indication information in the 2-bit bitmap (e.g., the MSB bit), when set to 1, indicates the commencement of a new MBS service. The fourth indication information in the 2-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the commencement of a new MBS service, and / or indicates a change in the service area of ​​the MBS service.

[0200] In one embodiment, the MCCH change notification may include a first instruction message, a fourth instruction message, and a third instruction message.

[0201] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; or to indicate whether the service area corresponding to the MBS service has changed; or to indicate whether a change has occurred that is not caused by the start of a new MBS service and whether the service area corresponding to the MBS service has changed; the third indication information is used to indicate whether the service area corresponding to the MBS service has changed.

[0202] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0203] When the fourth indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; or that the service area corresponding to the MBS service has changed; or that a change has occurred that was not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0204] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0205] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0206] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0207] Furthermore, in this embodiment, the first value of the fourth indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0208] Alternatively, when the fourth indication information is set to 0, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 1, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0209] Furthermore, in this embodiment, the first value of the third indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0210] Alternatively, when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0211] For example, MCCH change notifications are transmitted via a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The fourth indication information in the 3-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service; for example, a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or changes to neighbor cell information. The third indication information in the 3-bit bitmap, when set to 1, indicates a change in the service area of ​​the MBS service.

[0212] The MCCH change notification in this application embodiment may include first instruction information and / or second instruction information.

[0213] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service.

[0214] The second indication information indicates whether a change has occurred that is not caused by the start of a new MBS service, and may include a change in the service area corresponding to the MBS service.

[0215] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0216] When the second indication information is set to the first value, it indicates a change not caused by the start of a new MBS service, such as a change in MBS session configuration, termination of an MBS session, change of service in a neighboring cell, change of service area corresponding to the MBS service, or change of service area corresponding to the MBS service in the MBS session configuration. When the second indication information is set to the second value, it indicates no change not caused by the start of a new MBS service.

[0217] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0218] Specifically, in the embodiments of this application, the first value of the second indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; when the second indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service.

[0219] For example, MCCH change notifications are transmitted via a 2-bit bitmap. The first indication information in the 2-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The second indication information in the 2-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service. For example, a configuration change in an ongoing MBS session(s), the termination of an MBS session(s), or a change in neighbor cell information. Changes to the MBS session(s) configuration include indications of a change in the service area of ​​the MBS service. Again, for example, a configuration change in an ongoing MBS session(s), the termination of an MBS session(s), a change in neighbor cell information, or a change in the service area of ​​the MBS service.

[0220] In one embodiment, during the sending of MCCH change notification, the MCCH change notification can be sent starting from the beginning of the MCCH modification period; within an MCCH modification period, the same MCCH information can be transmitted multiple times.

[0221] In one embodiment, an MCCH modification period may include multiple repetition periods, with different repetition periods within an MCCH modification period transmitting the same MCCH information. In the field of mobile communications, in LTE systems, the MCCH (Multimedia Broadcast Multicast Control Channel) is a channel used to transmit control information related to MBMS (Multimedia Broadcast Multicast Service); in 5G NR systems, the MCCH (Multicast / Broadcast Control Channel) is a channel used to transmit control information related to MBS (Multicast / Broadcast Service). The MCCH modification period refers to the frequency at which information is updated or changed on this channel.

[0222] In one embodiment, an MCCH modification cycle can contain multiple repetition cycles. This is because information on the MCCH may need to be broadcast multiple times over a period of time to ensure that all interested users can receive this control information. This improves the reception success rate, especially in mobile environments where some users may not be able to successfully receive the information on the MCCH on the first attempt due to variations in signal strength. Within each repetition cycle, the MCCH carries the same control information until the start of the next MCCH modification cycle, at which point new or updated information may need to be broadcast to users. This mechanism helps ensure that relevant control information for MBMS services is effectively communicated to end users even in harsh wireless environments.

[0223] In one embodiment, MCCH change notification can be carried by the Physical Downlink Control Channel (PDCCH). When the network changes (partially) the MCCH information, the network will notify the UE of this change via the PDCCH starting from the beginning of the MCCH modification period. This PDCCH is the PDCCH that schedules the MCCH in each repetition period of this MCCH modification period.

[0224] Taking the MCCH transmission and reception method in LTE as an example, the SC-PTM in LTE adopts a two-level scheduling mechanism. SIB20 indicates the scheduling information of the SC-MCCH channel, including: modification period, repetition period, offset, first subframe, and the possible scheduling duration. In a subframe within the duration interval, the base station maps MBMS control / scheduling information onto PDSCH resources, maps downlink control information scheduling the PDSCH resources onto PDCCH resources, and scrambles the PDCCH using SC-RNTI. Specifically, the SC-MCCH carries the control information of the MBMS service, including the service identifier (TMGI), SC-MTCH scheduling information, etc. One SC-MTCH carries one MBMS service data. The SC-MTCH scheduling information may include: scheduling period, offset, the time interval length of the possible scheduling duration (OnDurationTimer), and the waiting time for the UE after successfully receiving downlink data (drxInactivityTimerSCPTM). The eNB uses G-RNTI to scramble the DCI of the PDCCH that schedules the SC-MTCH. Each MBMS service is allocated a separate G-RNTI. For each MBS service, in a certain subframe within the duration interval, the base station maps the MBS service data to the PDSCH resources, maps the downlink control information scheduling the PDSCH resources to the PDCCH resources, and scrambles the PDCCH with the corresponding G-RNTI. The MCCH transmission and reception method in 5G NR also adopts a two-level scheduling mechanism, similar to the MCCH transmission and reception method in LTE, and will not be elaborated here.

[0225] In one embodiment, MBS services may include multicast and / or broadcast services that can be received by terminals in RRC connected state and / or RRC inactive state and / or RRC idle state.

[0226] As an example, for a multicast service that can be received by a UE in the RRC connected state (RRC_CONNECTED), the UE can receive the multicast service in the service area corresponding to the multicast service based on the MBS configuration information when in the RRC_CONNECTED state, according to the indication information.

[0227] As an example, for a multicast service that can be received by a UE in the RRC inactive state (RRC_INACTIVE), the UE can receive the multicast service based on the MBS configuration information in the service area corresponding to the multicast service when in the RRC_INACTIVE state, according to the indication information.

[0228] As an example, for broadcast services that can be received by a UE in the RRC_CONNECTED, RRC_INACTIVE, or RRC_IDLE state, the UE can receive the broadcast service based on the MBS configuration information in the service area corresponding to the broadcast service when it is in the RRC_CONNECTED, RRC_INACTIVE, or RRC_IDLE state, according to the indication information.

[0229] In one embodiment, a service area modification period can also be sent; the service area modification period is carried by a system message.

[0230] In one embodiment, an MCCH change notification is sent during the service area modification period and the MCCH modification period; the MCCH change notification is used to indicate whether the MCCH information has changed; a change in the MCCH information includes at least one of the following: the start of a new MBS service, a change not caused by the start of a new MBS service, or a change in the service area corresponding to the MBS service.

[0231] In one embodiment, the service area modification period is N times the MCCH modification period; N is an integer greater than or equal to 1. Figure 4 is a schematic diagram illustrating the relationship between the service area modification period and the MCCH modification period according to an embodiment of this application. Figure 4 takes an MCCH modification period containing three repeating periods as an example. By merging multiple MCCH modification periods into a larger service area modification period, frequent channel configuration and reconfiguration can be reduced, thereby saving network resources. A longer service area modification period can also reduce the processing burden on the UE, thereby avoiding power waste for the UE and improving UE performance and user experience.

[0232] In one embodiment, changes not caused by the commencement of a new MBS service include at least one of the following: changes to MBS session configuration, termination of an MBS session, or changes to neighbor cell information.

[0233] Furthermore, changes not caused by the commencement of a new MBS service may include: a change in the service area of ​​the MBS service.

[0234] Furthermore, changes to the MBS session configuration may include changes to the service area of ​​the MBS service.

[0235] For example, the MBS session configuration includes the service area of ​​the MBS service, so changes to the MBS session configuration can include changes to the service area of ​​the MBS service.

[0236] In one embodiment, the change in the service area corresponding to the MBS service is as follows: the service area corresponding to the MBS service in the MCCH information sent in the current service area modification period is changed compared with the service area corresponding to the MBS service in the MCCH information sent in the previous service area modification period.

[0237] In one embodiment, the MCCH change notification includes first indication information, and / or second indication information, and / or third indication information, and / or fourth indication information; wherein, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; the third indication information is used to indicate whether the service area corresponding to the MBS service has changed; and the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service, and / or to indicate whether the service area corresponding to the MBS service has changed.

[0238] In one embodiment, the MCCH change notification may include a first indication information, a second indication information, and a third indication information; wherein, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; and the third indication information is used to indicate whether the service area corresponding to the MBS service has changed.

[0239] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0240] When the second indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0241] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0242] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0243] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0244] Furthermore, in the embodiments of this application, the first value of the second indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to 0, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0245] Alternatively, when the second indication information is set to 0, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to 1, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0246] Furthermore, in this embodiment, the first value of the third indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0247] Alternatively, when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0248] In one embodiment, the MCCH change notification may include a first instruction message and a fourth instruction message.

[0249] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; or to indicate whether the service area corresponding to the MBS service has changed; or to indicate whether a change has occurred that is not caused by the start of a new MBS service and whether the service area corresponding to the MBS service has changed.

[0250] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0251] When the fourth indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; or that the service area corresponding to the MBS service has changed; or that a change has occurred that was not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0252] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0253] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0254] Furthermore, in this embodiment, the first value of the fourth indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0255] Alternatively, when the fourth indication information is set to 0, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 1, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0256] In one embodiment, the MCCH change notification may include a first instruction message, a fourth instruction message, and a third instruction message.

[0257] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; or to indicate whether the service area corresponding to the MBS service has changed; or to indicate whether a change has occurred that is not caused by the start of a new MBS service and whether the service area corresponding to the MBS service has changed; the third indication information is used to indicate whether the service area corresponding to the MBS service has changed.

[0258] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0259] When the fourth indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; or that the service area corresponding to the MBS service has changed; or that a change has occurred that was not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0260] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0261] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0262] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0263] Furthermore, in this embodiment, the first value of the fourth indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0264] Alternatively, when the fourth indication information is set to 0, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 1, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0265] Furthermore, in this embodiment, the first value of the third indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0266] Alternatively, when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0267] The MCCH change notification in this application embodiment may include first instruction information and / or second instruction information.

[0268] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service.

[0269] The second indication information indicates whether a change has occurred that is not caused by the start of a new MBS service, and may include a change in the service area corresponding to the MBS service.

[0270] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0271] When the second indication information is set to the first value, it indicates a change not caused by the start of a new MBS service, such as a change in MBS session configuration, termination of an MBS session, change of service in a neighboring cell, change of service area corresponding to the MBS service, or change of service area corresponding to the MBS service in the MBS session configuration. When the second indication information is set to the second value, it indicates no change not caused by the start of a new MBS service.

[0272] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0273] Specifically, in the embodiments of this application, the first value of the second indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to 0, it indicates that no change has occurred that was not caused by the start of a new MBS service. In one embodiment, the service area modification period is greater than the MCCH modification period; or the service area modification period is less than the MCCH modification period; or the service area modification period is equal to the MCCH modification period.

[0274] In one embodiment, the service area corresponding to the MBS service will not change during the same service area modification cycle.

[0275] This application provides an MCCH receiving method, which is applicable to MCCH receiving scenarios. Specifically, this MCCH receiving method can be executed by an MCCH receiving device, which can be implemented through software and / or hardware and integrated into a terminal. It should be noted that details not described in detail in this embodiment can be found in any of the above embodiments.

[0276] Figure 5 is a flowchart illustrating an MCCH receiving method according to an embodiment of this application. As shown in Figure 5, the MCCH receiving method provided in this embodiment may include the following steps:

[0277] S510, The terminal receives indication information, which is used to indicate whether the MCCH information has been changed.

[0278] In one embodiment, whether the MCCH information has changed includes whether the service area corresponding to the MBS service has changed.

[0279] In this embodiment of the MCCH receiving method, the UE can determine whether the service area corresponding to the MBS service has changed based on the received indication information, which can provide a basis for determining whether to receive MCCH information, thereby avoiding power waste of the UE and improving the performance and user experience of the UE.

[0280] In an exemplary application scenario: Consider an MBS service in a communication system, denoted as MBS1, where the service area corresponding to MBS1 is service area 1. Assume the MBS service the UE is interested in is MBS1, and that the UE is outside service area 1. The UE can determine whether the service area corresponding to MBS1 has changed based on indication information. If the service area corresponding to MBS1 has changed, the UE can receive MCCH information; if the service area corresponding to MBS1 has not changed, the UE can choose not to receive MCCH information, thereby avoiding power waste and improving UE performance and user experience.

[0281] In one embodiment, the indication information may be included in the MCCH change notification; or the indication information may be included in the DCI; or the indication information may be included in the system message; or the indication information may be included in the MCCH; or the indication information may be included in the NAS message; or the indication information may be included in the AS message; or the indication information may be included in the RRC layer signaling; or the indication information may be included in the SDAP layer signaling; or the indication information may be included in the PDCP layer signaling; or the indication information may be included in the RLC layer signaling; or the indication information may be included in the MAC layer signaling; or the indication information may be included in the PHY layer signaling; or the indication information may be included in other messages.

[0282] For example, system messages can carry MBS system information blocks, NTN system message blocks, or instruction information.

[0283] Furthermore, the indication information can be included in the MBS system information block carried by the system message. For example, the indication information can be included in the MBS configuration information in the MBS system information block, in the NTN system message block carried by the system message, or in a dedicated system message block carried by the system message. The dedicated system message block is dedicated to carrying the indication information, and it can also be included in other system message blocks carried by the system message.

[0284] The indication information in the embodiments of this application can be 1 bit or multiple bits.

[0285] When the indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; when the indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0286] In this embodiment, the first value can be 1 or 0, and the second value can be 0 or 1. For example, when the indication information is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the indication information is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0287] Alternatively, when the indication information is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the indication information is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0288] In one embodiment, the indication information may be included in the MCCH change notification, which is used to indicate whether the MCCH information has been changed.

[0289] Specifically, changes to MCCH information include at least one of the following: the commencement of a new MBS service, changes not caused by the commencement of a new MBS service, or a change in the service area corresponding to the MBS service.

[0290] Furthermore, changes not caused by the commencement of a new MBS service may include: a change in the service area of ​​the MBS service.

[0291] Furthermore, changes not caused by the start of a new MBS service can include: changes to MBS session configuration, termination of an MBS session, and changes to neighboring cells.

[0292] Furthermore, changes to the MBS session configuration may include changes to the service area of ​​the MBS service.

[0293] The MCCH change notification in the embodiments of this application may include first indication information, and / or second indication information, and / or third indication information, and / or fourth indication information.

[0294] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; the third indication information is used to indicate whether the service area corresponding to the MBS service has changed; and the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service, and / or to indicate whether the service area corresponding to the MBS service has changed.

[0295] In one embodiment, the MCCH change notification may include a first instruction message, a second instruction message, and a third instruction message.

[0296] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; and the third indication information is used to indicate whether the service area corresponding to the MBS service has changed.

[0297] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0298] When the second indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0299] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0300] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0301] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0302] Furthermore, in the embodiments of this application, the first value of the second indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to 0, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0303] Alternatively, when the second indication information is set to 0, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to 1, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0304] Furthermore, in this embodiment, the first value of the third indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0305] Alternatively, when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0306] For example, MCCH change notifications are transmitted via a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The second indication information in the 3-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service; for example, a configuration change in an ongoing MBS session(s), the termination of an MBS session(s), or changes to neighbor cell information. The third indication information in the 3-bit bitmap, when set to 1, indicates a change in the service area of ​​the MBS service.

[0307] In one embodiment, the MCCH change notification may include a first instruction message and a fourth instruction message.

[0308] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; or to indicate whether the service area corresponding to the MBS service has changed; or to indicate whether a change has occurred that is not caused by the start of a new MBS service and whether the service area corresponding to the MBS service has changed.

[0309] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0310] When the fourth indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; or that the service area corresponding to the MBS service has changed; or that a change has occurred that was not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0311] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0312] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0313] Furthermore, in this embodiment, the first value of the fourth indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0314] Alternatively, when the fourth indication information is set to 0, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 1, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0315] For example, MCCH change notifications are transmitted via a 2-bit bitmap. The first indication information in the 2-bit bitmap (e.g., the MSB bit), when set to 1, indicates the commencement of a new MBS service. The fourth indication information in the 2-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the commencement of a new MBS service, and / or indicates a change in the service area of ​​the MBS service.

[0316] In one embodiment, the MCCH change notification may include a first instruction message, a fourth instruction message, and a third instruction message.

[0317] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; or to indicate whether the service area corresponding to the MBS service has changed; or to indicate whether a change has occurred that is not caused by the start of a new MBS service and whether the service area corresponding to the MBS service has changed; the third indication information is used to indicate whether the service area corresponding to the MBS service has changed.

[0318] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0319] When the fourth indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; or that the service area corresponding to the MBS service has changed; or that a change has occurred that was not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0320] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0321] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0322] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0323] Furthermore, in this embodiment, the first value of the fourth indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0324] Alternatively, when the fourth indication information is set to 0, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 1, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0325] Furthermore, in this embodiment, the first value of the third indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0326] Alternatively, when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0327] For example, MCCH change notifications are transmitted via a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The fourth indication information in the 3-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service; for example, a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or changes to neighbor cell information. The third indication information in the 3-bit bitmap, when set to 1, indicates a change in the service area of ​​the MBS service.

[0328] The MCCH change notification in this application embodiment may include first instruction information and / or second instruction information.

[0329] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service.

[0330] The second indication information indicates whether a change has occurred that is not caused by the start of a new MBS service, and may include a change in the service area corresponding to the MBS service.

[0331] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0332] When the second indication information is set to the first value, it indicates a change not caused by the start of a new MBS service, such as a change in MBS session configuration, termination of an MBS session, change of service in a neighboring cell, change of service area corresponding to the MBS service, or change of service area corresponding to the MBS service in the MBS session configuration. When the second indication information is set to the second value, it indicates no change not caused by the start of a new MBS service.

[0333] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0334] Specifically, in the embodiments of this application, the first value of the second indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; when the second indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service.

[0335] For example, MCCH change notifications are transmitted via a 2-bit bitmap. The first indication information in the 2-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The second indication information in the 2-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service. For example, a configuration change in an ongoing MBS session(s), the termination of an MBS session(s), or a change in neighbor cell information. Changes to the MBS session(s) configuration include indications of a change in the service area of ​​the MBS service. Again, for example, a configuration change in an ongoing MBS session(s), the termination of an MBS session(s), a change in neighbor cell information, or a change in the service area of ​​the MBS service.

[0336] In one embodiment: when the UE receives an MCCH change notification, the UE can receive MCCH information.

[0337] It should be noted that the MCC change notification mentioned here is actually an MCCH change notification indicating that the MCCH information has been changed. Accordingly, after receiving the MCCH change notification, the UE knows that the MCCH information has changed and therefore receives the MCCH information.

[0338] In an exemplary application scenario: When an MCCH change notification is received, a UE that is receiving or is interested in receiving MBS broadcast services begins acquiring new MCCH information from this time slot. The UE uses the previously acquired MCCH information until it acquires new MCCH information. This MCCH change notification indicates a change in MCCH information and is transmitted via a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The second indication information in the 3-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification of the MCCH information rather than a change caused by the start of a new MBS service; for example, a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or a change in neighboring cell information. The third indication information in the 3-bit bitmap, when set to 1, indicates a change in the service area of ​​the MBS service.

[0339] In an exemplary application scenario: When an MCCH change notification is received, a UE that is receiving or is interested in receiving MBS broadcast services begins acquiring new MCCH information from this time slot. The UE uses the previously acquired MCCH information until it acquires new MCCH information. The MCCH change notification indicates that the MCCH information has changed, and it is transmitted via a 2-bit bitmap. The first indication information in the 2-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The fourth indication information in the 2-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification of the MCCH information rather than a change caused by the start of a new MBS service, and / or indicates a change in the service area of ​​the MBS service.

[0340] In an exemplary application scenario: When an MCCH change notification is received, a UE that is receiving or is interested in receiving MBS broadcast services begins acquiring new MCCH information from this time slot. The UE uses the previously acquired MCCH information until it acquires new MCCH information. This MCCH change notification indicates a change in MCCH information and is transmitted via a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The fourth indication information in the 3-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification of the MCCH information rather than a change caused by the start of a new MBS service, such as a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or a change in neighboring cell information. The third indication information in the 3-bit bitmap, when set to 1, indicates a change in the service area of ​​the MBS service.

[0341] In an exemplary application scenario: When an MCCH change notification is received, a UE that is receiving or is interested in receiving MBS broadcast services begins acquiring new MCCH information from this time slot. The UE uses the previously acquired MCCH information until it acquires new MCCH information. This MCCH change notification is transmitted via a 2-bit bitmap. The first indication information in the 2-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The second indication information in the 2-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification of the MCCH information rather than a change caused by the start of a new MBS service, such as a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or a change in neighboring cell information. Changes to the configuration of an MBS session(s) may include indications of a change in the service area of ​​the MBS service. For example, a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), a change in neighboring cell information, or a change in the service area of ​​the MBS service.

[0342] It should also be noted that the MCCH change notification can also indicate that the MCCH information has not been changed. Accordingly, after receiving such an MCCH change notification, the UE knows that the MCCH information has not changed and can choose not to receive the MCCH information.

[0343] In one embodiment, the UE can receive an MCCH change notification; if the MCCH change notification indicates that the MCCH information has changed, the UE can receive the MCCH information; if the MCCH change notification indicates that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0344] In an exemplary application scenario: For an MBS service in a communication system, denoted as MBS1, where the service area corresponding to MBS1 is service area 1. Assume the MBS service the UE is interested in is MBS1, and assume the UE is outside service area 1. The UE can know that MCCH information has changed based on MCCH change notifications, such as whether the service area corresponding to MBS1 has changed. If the service area corresponding to MBS1 has changed, the MCCH change notification will indicate that the MCCH has changed, and the UE will receive the MCCH information after receiving the MCCH change notification. If the MCCH information has not changed, including the service area corresponding to MBS1, the UE can choose not to receive the MCCH information after receiving the MCCH change notification, thereby avoiding power waste and improving UE performance and user experience.

[0345] In one embodiment, the UE may receive an MCCH change notification;

[0346] If at least one of the first and / or second and / or third and / or fourth indications in the MCCH change notification indicates that the MCCH information has changed, then the UE can receive the MCCH information.

[0347] In one embodiment, the UE may receive an MCCH change notification;

[0348] If at least one of the first and / or second and / or third and / or fourth indications in the MCCH change notification indicates that a portion of the MCCH information has changed, then the UE can receive the MCCH information.

[0349] Specifically, the first indication message indicating that a change in the corresponding part of the MCCH information means that a new MBS service has started;

[0350] The second indication information indicates that the change in the corresponding part of the MCCH information is a change that is not caused by the start of a new MBS service;

[0351] The third indication information indicates that the change in the part corresponding to the MCCH information means that the service area corresponding to the MBS service has changed.

[0352] The fourth indication information indicates that the part corresponding to the MCCH information has changed, which means that the change is not caused by the start of a new MBS service, and / or indicates that the service area corresponding to the MBS service has changed.

[0353] In an exemplary application scenario: For an MBS service in a communication system, denoted as MBS1, where the service area corresponding to MBS1 is service area 1. Assume that the MBS service the UE is interested in is MBS1, and assume that the UE is outside service area 1. The UE can know whether service area 1 has changed based on at least one of the first and / or second and / or third and / or fourth indications contained in the MCCH change notification; if service area 1 has changed, the UE can receive MCCH information.

[0354] It should be noted that the MCCH change notification can also indicate that the MCCH information has not been changed. Accordingly, after receiving such an MCCH change notification, the UE knows that the MCCH information has not changed and can choose not to receive the MCCH information.

[0355] Specifically, if the first, second, third, and fourth indications contained in the MCCH change notification all indicate that the MCCH information has not changed, then the UE may not receive the MCCH information.

[0356] In one embodiment, the UE may receive an MCCH change notification;

[0357] If at least one of the first and / or second and / or third and / or fourth indications in the MCCH change notification indicates that the corresponding part of the MCCH information has not changed, then the UE can receive the MCCH information.

[0358] Specifically, the first indication message indicating that a change in the corresponding part of the MCCH information means that a new MBS service has started;

[0359] The second indication information indicates that the change in the corresponding part of the MCCH information is a change that is not caused by the start of a new MBS service;

[0360] The third indication information indicates that the change in the part corresponding to the MCCH information means that the service area corresponding to the MBS service has changed.

[0361] The fourth indication information indicates that the part corresponding to the MCCH information has changed, which means that the change is not caused by the start of a new MBS service, and / or indicates that the service area corresponding to the MBS service has changed.

[0362] In an exemplary application scenario: For an MBS service in a communication system, denoted as MBS1, where the service area corresponding to MBS1 is service area 1. Assume that the MBS service the UE is interested in is MBS1, and assume that the UE is outside service area 1. The UE can know whether service area 1 has changed based on at least one of the first and / or second and / or third and / or fourth indications contained in the MCCH change notification; if service area 1 has not changed, the UE can choose not to receive the MCCH information, thereby avoiding power waste for the UE and improving UE performance and user experience.

[0363] In one embodiment, if the UE is not in the service area corresponding to the MBS service, or if the UE is in the service area corresponding to the MBS service, the UE can receive an MCCH change notification; if the MCCH change notification indicates that the MCCH information has changed, the UE can receive the MCCH information; if the MCCH change notification indicates that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0364] In one embodiment, the UE is a UE using the 3GPP R19 version protocol, or a UE using a version of the protocol prior to 3GPP R19; the UE can receive MCCH change notifications; if the MCCH change notification indicates that the MCCH information has changed, the UE can receive the MCCH information; if the MCCH change notification indicates that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0365] An exemplary application scenario is: the UE is a terminal using the 3GPP R19 version protocol, and the UE is not located within the service area corresponding to the MBS service.

[0366] In one embodiment, the MCCH change notification includes a first indication information, a second indication information, and a third indication information. The UE can receive the MCCH change notification, and receive the first indication information and the third indication information. If at least one of the first and third indication information indicates that the MCCH information has changed, the UE can receive the MCCH information. Alternatively, if both the first and third indication information indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0367] For example, MCCH change notifications are transmitted via a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The second indication information in the 3-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service; for example, a configuration change in an ongoing MBS session(s), the termination of an MBS session(s), or changes to neighbor cell information. The third indication information in the 3-bit bitmap, when set to 1, indicates a change in the service area of ​​the MBS service.

[0368] In another embodiment, the MCCH change notification includes a first indication information and a fourth indication information; the UE can receive the MCCH change notification, and receive both the first and fourth indication information; if at least one of the first and fourth indication information indicates that the MCCH information has changed, the UE can receive the MCCH information. Alternatively, if both the first and fourth indication information indicate that the MCCH information has not changed, the UE may not receive the MCCH information.

[0369] For example, MCCH change notifications are transmitted via a 2-bit bitmap. The first indication information in the 2-bit bitmap (e.g., the MSB bit), when set to 1, indicates the commencement of a new MBS service. The fourth indication information in the 2-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the commencement of a new MBS service, and / or indicates a change in the service area of ​​the MBS service.

[0370] In another embodiment, the MCCH change notification includes a first indication message, a fourth indication message, and a third indication message. In one example, the UE can receive the MCCH change notification, and receive the first indication message and the third indication message; if at least one of the first indication message and the third indication message indicates that the MCCH information has changed, the UE can receive the MCCH information; if both the first indication message and the third indication message indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0371] In another example, the UE can receive an MCCH change notification and receive a first indication message and a fourth indication message; if at least one of the first indication message and the fourth indication message indicates that the MCCH information has changed, the UE can receive the MCCH information; if both the first indication message and the fourth indication message indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0372] In another example, the UE can receive an MCCH change notification, and receive a first indication message, a fourth indication message, and a third indication message; if at least one of the first indication message, the fourth indication message, and the third indication message indicates that the MCCH information has changed, then the UE can receive the MCCH information; if the first indication message, the fourth indication message, and the third indication message all indicate that the MCCH information has not changed, then the UE can choose not to receive the MCCH information.

[0373] For example, MCCH change notifications are transmitted via a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The fourth indication information in the 3-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service; for example, a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or changes to neighbor cell information. The third indication information in the 3-bit bitmap, when set to 1, indicates a change in the service area of ​​the MBS service.

[0374] In another embodiment, the MCCH change notification includes first indication information and second indication information; the first indication information indicates whether a new MBS service has started; the second indication information indicates whether a change has occurred that is not caused by the start of a new MBS service, and may include a change in the service area corresponding to the MBS service. The UE can receive the MCCH change notification, and receive the first and second indication information; if at least one of the first and second indication information indicates that the MCCH information has changed, the UE can receive the MCCH information. Alternatively, if both the first and second indication information indicate that the MCCH information has not changed, the UE may not receive the MCCH information.

[0375] For example, MCCH change notifications are transmitted via a 2-bit bitmap. The first indication information in the 2-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The second indication information in the 2-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service. For example, a configuration change in an ongoing MBS session(s), the termination of an MBS session(s), or a change in neighbor cell information. Changes to the MBS session(s) configuration include indications of a change in the service area of ​​the MBS service. Again, for example, a configuration change in an ongoing MBS session(s), the termination of an MBS session(s), a change in neighbor cell information, or a change in the service area of ​​the MBS service.

[0376] Another exemplary application scenario is: the UE is a terminal using the 3GPP R19 version protocol, and the UE is located within the service area corresponding to the MBS service:

[0377] In one embodiment, the MCCH change notification includes a first indication information, a second indication information, and a third indication information; the UE can receive the MCCH change notification, and receive the first indication information, the second indication information, and the third indication information; if at least one of the first indication information, the second indication information, and the third indication information indicates that the MCCH information has changed, the UE can receive the MCCH information; or, if the first indication information, the second indication information, and the third indication information all indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0378] In another embodiment, the MCCH change notification includes a first indication information and a fourth indication information; the UE can receive the MCCH change notification and receive the first indication information and the fourth indication information; if at least one of the first indication information and the fourth indication information indicates that the MCCH information has changed, the UE can receive the MCCH information; or, if both the first indication information and the fourth indication information indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0379] In another embodiment, the MCCH change notification includes a first indication information, a fourth indication information, and a third indication information. In one example, the UE can receive the MCCH change notification, and receive the first indication information and the third indication information; if at least one of the first indication information and the third indication information indicates that the MCCH information has changed, the UE can receive the MCCH information; or, if both the first indication information and the third indication information indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0380] In another example, the UE can receive an MCCH change notification and receive a first indication message and a fourth indication message; if at least one of the first indication message and the fourth indication message indicates that the MCCH information has changed, the UE can receive the MCCH information; or, if both the first indication message and the fourth indication message indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0381] In another example, the UE can receive an MCCH change notification, and receive a first indication message, a fourth indication message, and a third indication message. If at least one of the first, fourth, and third indication messages indicates that the MCCH information has changed, the UE can receive the MCCH information. Alternatively, if the first, fourth, and third indication messages all indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0382] In another embodiment, the MCCH change notification includes first indication information and second indication information; the first indication information indicates whether a new MBS service has started; the second indication information indicates whether a change has occurred that is not caused by the start of a new MBS service, and may include a change in the service area corresponding to the MBS service. The UE can receive the MCCH change notification, and receive the first and second indication information; if at least one of the first and second indication information indicates that the MCCH information has changed, the UE can receive the MCCH information. Alternatively, if both the first and second indication information indicate that the MCCH information has not changed, the UE may not receive the MCCH information. An exemplary application scenario is: the UE is a UE using a version of the protocol prior to 3GPP R19:

[0383] In one embodiment, the MCCH change notification includes first indication information, second indication information, and third indication information; the UE can receive the MCCH change notification, and receive the first and second indication information; if at least one of the first and second indication information indicates that the MCCH information has changed, the UE can receive the MCCH information. Alternatively, if both the first and second indication information indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0384] In another embodiment, the MCCH change notification includes a first indication information and a fourth indication information. The UE can receive the MCCH change notification, and receive both the first and fourth indication information; if at least one of the first and fourth indication information indicates that the MCCH information has changed, the UE can receive the MCCH information. Alternatively, if both the first and fourth indication information indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0385] In another embodiment, the MCCH change notification includes a first indication information, a fourth indication information, and a third indication information. The UE can receive the MCCH change notification, and receive the first and fourth indication information; if at least one of the first and fourth indication information indicates that the MCCH information has changed, the UE can receive the MCCH information. Alternatively, if both the first and fourth indication information indicate that the MCCH information has not changed, the UE may not receive the MCCH information.

[0386] For example, MCCH change notifications are transmitted via a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The fourth indication information in the 3-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service; for example, a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or changes to neighbor cell information. The third indication information in the 3-bit bitmap, when set to 1, indicates a change in the service area of ​​the MBS service.

[0387] The MCCH change notification in this application embodiment may include first instruction information and / or second instruction information.

[0388] The first indication information indicates whether a new MBS service has started; the second indication information indicates whether a change has occurred that is not caused by the start of a new MBS service, and may include a change in the service area corresponding to the MBS service. The UE can receive an MCCH change notification, and receive both the first and second indication information. If at least one of the first and second indication information indicates that the MCCH information has changed, the UE can receive the MCCH information. Alternatively, if both the first and second indication information indicate that the MCCH information has not changed, the UE may not receive the MCCH information.

[0389] For example, MCCH change notifications are transmitted via a 2-bit bitmap. The first indication information in the 2-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The second indication information in the 2-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service. For example, a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or a change in neighbor cell information. Configuration changes of MBS sessions(s) include indications of changes in the service area of ​​the MBS service, again for example, a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or changes in neighbor cell information, or a change in the service area of ​​the MBS service.

[0390] In one embodiment, MBS services may include multicast and / or broadcast services that can be received by terminals in RRC connected state and / or RRC inactive state and / or RRC idle state.

[0391] As an example, for a multicast service that can be received by a UE in the RRC connected state (RRC_CONNECTED), the UE can receive the multicast service in the service area corresponding to the multicast service based on the MBS configuration information when in the RRC_CONNECTED state, according to the indication information.

[0392] As an example, for a multicast service that can be received by a UE in the RRC inactive state (RRC_INACTIVE), the UE can receive the multicast service based on the MBS configuration information in the service area corresponding to the multicast service when in the RRC_INACTIVE state, according to the indication information.

[0393] As an example, for broadcast services that can be received by a UE in the RRC_CONNECTED, RRC_INACTIVE, or RRC_IDLE state, the UE can receive the broadcast service based on the MBS configuration information in the service area corresponding to the broadcast service when it is in the RRC_CONNECTED, RRC_INACTIVE, or RRC_IDLE state, according to the indication information.

[0394] This application provides an MCCH receiving method, which is applicable to MCCH receiving scenarios. Specifically, this MCCH receiving method can be executed by an MCCH receiving device, which can be implemented through software and / or hardware and integrated into a terminal. It should be noted that details not described in detail in this embodiment can be found in any of the above embodiments.

[0395] Figure 6 is a flowchart illustrating an MCCH receiving method according to another embodiment of this application. As shown in Figure 6, the MCCH receiving method provided in this embodiment may include the following steps:

[0396] S610. The UE receives an MCCH change notification, which indicates whether the MCCH information has been changed.

[0397] In one embodiment, changes in MCCH information include changes in the service area corresponding to the MBS service.

[0398] In one embodiment, the indication information may be included in the MCCH change notification, which is used to indicate whether the MCCH information has been changed.

[0399] Furthermore, changes not caused by the commencement of a new MBS service may include: a change in the service area of ​​the MBS service.

[0400] Furthermore, changes not caused by the start of a new MBS service can include: changes to MBS session configuration, termination of an MBS session, and changes to neighboring cells.

[0401] Furthermore, changes to the MBS session configuration may include changes to the service area of ​​the MBS service.

[0402] In one embodiment, the MCCH change notification can indicate whether the service area corresponding to the MBS service has changed using 1 bit or multiple bits.

[0403] When at least one bit is set to the first value, it indicates that the service area corresponding to the MBS service has changed; when at least one bit is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0404] In the embodiments of this application, the first value can be 1 or 0, and the second value can be 0 or 1. For example, when the at least 1 bit is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the at least 1 bit is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0405] Alternatively, when at least one bit is set to 0, it indicates that the service area corresponding to the MBS service has changed; when at least one bit is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0406] In one embodiment, the MCCH change notification is used to indicate whether the MCCH information has been changed.

[0407] Furthermore, changes not caused by the commencement of a new MBS service may include: a change in the service area of ​​the MBS service.

[0408] Specifically, changes to MCCH information include at least one of the following: the commencement of a new MBS service, changes not caused by the commencement of a new MBS service, or a change in the service area corresponding to the MBS service.

[0409] Furthermore, changes not caused by the start of a new MBS service can include: changes to MBS session configuration, termination of an MBS session, and changes to neighboring cells.

[0410] Furthermore, changes to the MBS session configuration may include changes to the service area of ​​the MBS service.

[0411] The MCCH change notification in this embodiment may include a first indication information, and / or a second indication information, and / or a third indication information, and / or a fourth indication information; wherein, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; the third indication information is used to indicate whether the service area corresponding to the MBS service has changed; and the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service, and / or to indicate whether the service area corresponding to the MBS service has changed.

[0412] In one embodiment, the MCCH change notification may include a first instruction message, a second instruction message, and a third instruction message.

[0413] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; and the third indication information is used to indicate whether the service area corresponding to the MBS service has changed.

[0414] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0415] When the second indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0416] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0417] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0418] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0419] Furthermore, in the embodiments of this application, the first value of the second indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to 0, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0420] Alternatively, when the second indication information is set to 0, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to 1, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0421] Furthermore, in this embodiment, the first value of the third indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0422] Alternatively, when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0423] For example, MCCH change notifications are transmitted via a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The second indication information in the 3-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service; for example, a configuration change in an ongoing MBS session(s), the termination of an MBS session(s), or changes to neighbor cell information. The third indication information in the 3-bit bitmap, when set to 1, indicates a change in the service area of ​​the MBS service.

[0424] In one embodiment, the MCCH change notification may include a first instruction message and a fourth instruction message.

[0425] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; or to indicate whether the service area corresponding to the MBS service has changed; or to indicate whether a change has occurred that is not caused by the start of a new MBS service and whether the service area corresponding to the MBS service has changed.

[0426] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0427] When the fourth indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; or that the service area corresponding to the MBS service has changed; or that a change has occurred that was not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0428] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0429] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0430] Furthermore, in this embodiment, the first value of the fourth indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0431] Alternatively, when the fourth indication information is set to 0, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 1, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0432] For example, MCCH change notifications are transmitted via a 2-bit bitmap. The first indication information in the 2-bit bitmap (e.g., the MSB bit), when set to 1, indicates the commencement of a new MBS service. The fourth indication information in the 2-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the commencement of a new MBS service, and / or indicates a change in the service area of ​​the MBS service.

[0433] In one embodiment, the MCCH change notification may include a first instruction message, a fourth instruction message, and a third instruction message.

[0434] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; or to indicate whether the service area corresponding to the MBS service has changed; or to indicate whether a change has occurred that is not caused by the start of a new MBS service and whether the service area corresponding to the MBS service has changed; the third indication information is used to indicate whether the service area corresponding to the MBS service has changed.

[0435] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0436] When the fourth indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; or that the service area corresponding to the MBS service has changed; or that a change has occurred that was not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0437] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0438] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0439] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0440] Furthermore, in this embodiment, the first value of the fourth indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0441] Alternatively, when the fourth indication information is set to 0, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 1, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0442] Furthermore, in this embodiment, the first value of the third indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0443] Alternatively, when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0444] For example, MCCH change notifications are transmitted via a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The fourth indication information in the 3-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service; for example, a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or changes to neighbor cell information. The third indication information in the 3-bit bitmap, when set to 1, indicates a change in the service area of ​​the MBS service.

[0445] The MCCH change notification in this application embodiment may include first instruction information and / or second instruction information.

[0446] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service.

[0447] The second indication information indicates whether a change has occurred that is not caused by the start of a new MBS service, and may include a change in the service area corresponding to the MBS service.

[0448] When the first indication information is set to the eleventh value, it indicates that a new MBS service has started; when the first indication information is set to the twelfth value, it indicates that no new MBS service has started.

[0449] When the second indication information is set to the thirteenth value, it indicates a change not caused by the start of a new MBS service, such as a change in MBS session configuration, termination of an MBS session, change of service in a neighboring cell, change of service area corresponding to the MBS service, or change of service area corresponding to the MBS service in the MBS session configuration. When the second indication information is set to the fourteenth value, it indicates no change not caused by the start of a new MBS service.

[0450] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0451] Specifically, in the embodiments of this application, the first value of the second indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; when the second indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service.

[0452] For example, MCCH change notifications are transmitted via a 2-bit bitmap. The first indication information in the 2-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The second indication information in the 2-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service. For example, a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or a change in neighbor cell information. Configuration changes of MBS sessions(s) include indications of changes in the service area of ​​the MBS service, again for example, a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), changes in neighbor cell information, or a change in the service area of ​​the MBS service.

[0453] In one embodiment, the UE can receive an MCCH change notification; if the MCCH change notification indicates that the MCCH information has changed, the UE can receive the MCCH information; if the MCCH change notification indicates that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0454] In an exemplary application scenario: Consider an MBS service in a communication system, denoted as MBS1, where the service area corresponding to MBS1 is service area 1. Assume the MBS service the UE is interested in is MBS1, and that the UE is outside service area 1. The UE can determine whether the service area corresponding to MBS1 has changed based on MCCH change notifications. If the service area corresponding to MBS1 has changed, the UE can receive MCCH information; if the service area corresponding to MBS1 has not changed, the UE can choose not to receive MCCH information, thereby avoiding power waste and improving UE performance and user experience.

[0455] In one embodiment, the UE can receive an MCCH change notification; if at least one of the first and / or second and / or third and / or fourth indication information contained in the MCCH change notification indicates that the MCCH information has changed, the UE can receive the MCCH information; if the first and second indication information, the third and fourth indication information contained in the MCCH change notification all indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0456] In an exemplary application scenario: For an MBS service in a communication system, denoted as MBS1, where the service area corresponding to MBS1 is service area 1. Assume that the MBS service the UE is interested in is MBS1, and assume that the UE is outside service area 1. The UE can know whether service area 1 has changed based on at least one of the first and / or second and / or third and / or fourth indications contained in the MCCH change notification. If service area 1 has changed, the UE can receive the MCCH information; if service area 1 has not changed, the UE can choose not to receive the MCCH information, thereby avoiding power waste for the UE and improving UE performance and user experience.

[0457] In one embodiment, if the UE is not in the service area corresponding to the MBS service, or if the UE is in the service area corresponding to the MBS service, the UE can receive an MCCH change notification; if the MCCH change notification indicates that the MCCH information has changed, the UE can receive the MCCH information; if the MCCH change notification indicates that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0458] In one embodiment, the UE is a UE using the 3GPP R19 version protocol, or a UE using a version of the protocol prior to 3GPP R19; the UE can receive MCCH change notifications; if the MCCH change notification indicates that the MCCH information has changed, the UE can receive the MCCH information; if the MCCH change notification indicates that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0459] An exemplary application scenario is: the UE is a terminal using the 3GPP R19 version protocol, and the UE is not located within the service area corresponding to the MBS service.

[0460] In one embodiment, the MCCH change notification includes a first indication information, a second indication information, and a third indication information; the UE can receive the MCCH change notification, and receive the first indication information and the third indication information; if at least one of the first indication information and the third indication information indicates that the MCCH information has changed, the UE can receive the MCCH information; if both the first indication information and the third indication information indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0461] In another embodiment, the MCCH change notification includes a first indication information and a fourth indication information; the UE can receive the MCCH change notification and receive the first indication information and the fourth indication information; if at least one of the first indication information and the fourth indication information indicates that the MCCH information has changed, the UE can receive the MCCH information; if both the first indication information and the fourth indication information indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0462] In another embodiment, the MCCH change notification includes a first indication message, a fourth indication message, and a third indication message. In one example, the UE can receive the MCCH change notification, and receive the first indication message and the third indication message; if at least one of the first indication message and the third indication message indicates that the MCCH information has changed, the UE can receive the MCCH information; if both the first indication message and the third indication message indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0463] In another example, the UE can receive an MCCH change notification and receive a first indication message and a fourth indication message; if at least one of the first indication message and the fourth indication message indicates that the MCCH information has changed, the UE can receive the MCCH information; if both the first indication message and the fourth indication message indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0464] In another example, the UE can receive an MCCH change notification, and receive a first indication message, a fourth indication message, and a third indication message; if at least one of the first indication message, the fourth indication message, and the third indication message indicates that the MCCH information has changed, then the UE can receive the MCCH information; if the first indication message, the fourth indication message, and the third indication message all indicate that the MCCH information has not changed, then the UE can choose not to receive the MCCH information.

[0465] In one embodiment, the MCCH change notification includes first indication information and second indication information. The first indication information indicates whether a new MBS service has started. The second indication information indicates whether a change has occurred that is not caused by the start of a new MBS service, and may include a change in the service area corresponding to the MBS service. The UE can receive the MCCH change notification and receive the first and second indication information. If at least one of the first and second indication information indicates that the MCCH information has changed, the UE can receive the MCCH information. Alternatively, if both the first and second indication information indicate that the MCCH information has not changed, the UE may not receive the MCCH information. Another exemplary application scenario is: the UE is a terminal using the 3GPP R19 version protocol, and the UE is located within the service area corresponding to the MBS service.

[0466] In one embodiment, the MCCH change notification includes a first indication information, a second indication information, and a third indication information; the UE can receive the MCCH change notification, and receive the first indication information, the second indication information, and the third indication information; if at least one of the first indication information, the second indication information, and the third indication information indicates that the MCCH information has changed, the UE can receive the MCCH information; if the first indication information, the second indication information, and the third indication information all indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0467] In another embodiment, the MCCH change notification includes a first indication information and a fourth indication information; the UE can receive the MCCH change notification and receive the first indication information and the fourth indication information; if at least one of the first indication information and the fourth indication information indicates that the MCCH information has changed, the UE can receive the MCCH information; if both the first indication information and the fourth indication information indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0468] In another embodiment, the MCCH change notification includes a first indication message, a fourth indication message, and a third indication message. In one example, the UE can receive the MCCH change notification, and receive the first indication message and the third indication message; if at least one of the first indication message and the third indication message indicates that the MCCH information has changed, the UE can receive the MCCH information; if both the first indication message and the third indication message indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0469] In another example, the UE can receive an MCCH change notification and receive a first indication message and a fourth indication message; if at least one of the first indication message and the fourth indication message indicates that the MCCH information has changed, the UE can receive the MCCH information; if both the first indication message and the fourth indication message indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0470] In another example, the UE can receive an MCCH change notification, and receive a first indication message, a fourth indication message, and a third indication message; if at least one of the first indication message, the fourth indication message, and the third indication message indicates that the MCCH information has changed, then the UE can receive the MCCH information; if the first indication message, the fourth indication message, and the third indication message all indicate that the MCCH information has not changed, then the UE can choose not to receive the MCCH information.

[0471] In another embodiment, the MCCH change notification includes first indication information and second indication information; the first indication information indicates whether a new MBS service has started; the second indication information indicates whether a change has occurred that is not caused by the start of a new MBS service, and may include a change in the service area corresponding to the MBS service. The UE can receive the MCCH change notification, and receive the first and second indication information; if at least one of the first and second indication information indicates that the MCCH information has changed, the UE can receive the MCCH information. Alternatively, if both the first and second indication information indicate that the MCCH information has not changed, the UE may not receive the MCCH information.

[0472] An exemplary application scenario is: the UE is a UE using a version of the protocol prior to 3GPP R19:

[0473] In one embodiment, the MCCH change notification includes a first indication information, a second indication information, and a third indication information; the UE can receive the MCCH change notification, and receive the first indication information and the second indication information; if at least one of the first indication information and the second indication information indicates that the MCCH information has changed, the UE can receive the MCCH information; if both the first indication information and the second indication information indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0474] In another embodiment, the MCCH change notification includes a first indication information and a fourth indication information. The UE can receive the MCCH change notification, and receive the first indication information and the fourth indication information; if at least one of the first indication information and the fourth indication information indicates that the MCCH information has changed, the UE can receive the MCCH information; if both the first indication information and the fourth indication information indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0475] In another embodiment, the MCCH change notification includes a first indication information, a fourth indication information, and a third indication information. The UE can receive the MCCH change notification, and receive the first indication information and the fourth indication information; if at least one of the first indication information and the fourth indication information indicates that the MCCH information has changed, the UE can receive the MCCH information; if both the first indication information and the fourth indication information indicate that the MCCH information has not changed, the UE can choose not to receive the MCCH information.

[0476] In another embodiment, the MCCH change notification includes first indication information and second indication information; the first indication information indicates whether a new MBS service has started; the second indication information indicates whether a change has occurred that is not caused by the start of a new MBS service, and may include a change in the service area corresponding to the MBS service. The UE can receive the MCCH change notification, and receive the first and second indication information; if at least one of the first and second indication information indicates that the MCCH information has changed, the UE can receive the MCCH information. Alternatively, if both the first and second indication information indicate that the MCCH information has not changed, the UE may not receive the MCCH information.

[0477] In one embodiment, MBS services may include multicast and / or broadcast services that can be received by terminals in RRC connected state and / or RRC inactive state and / or RRC idle state.

[0478] As an example, for a multicast service that can be received by a UE in the RRC connected state (RRC_CONNECTED), the UE can receive the multicast service in the service area corresponding to the multicast service based on the MBS configuration information when in the RRC_CONNECTED state, according to the indication information.

[0479] As an example, for a multicast service that can be received by a UE in the RRC inactive state (RRC_INACTIVE), the UE can receive the multicast service based on the MBS configuration information in the service area corresponding to the multicast service when in the RRC_INACTIVE state, according to the indication information.

[0480] As an example, for broadcast services that can be received by a UE in the RRC_CONNECTED, RRC_INACTIVE, or RRC_IDLE state, the UE can receive the broadcast service based on the MBS configuration information in the service area corresponding to the broadcast service when it is in the RRC_CONNECTED, RRC_INACTIVE, or RRC_IDLE state, according to the indication information.

[0481] In one embodiment, the terminal can also modify the service area period; the service area modification period is carried by a system message.

[0482] In one embodiment, the terminal receives an MCCH change notification during the service area modification cycle and the MCCH modification cycle; the MCCH change notification is used to indicate whether the MCCH information has changed; the change of MCCH information includes at least one of the following: the start of a new MBS service, a change not caused by the start of a new MBS service, or a change in the service area corresponding to the MBS service.

[0483] Furthermore, changes not caused by the commencement of a new MBS service may include: a change in the service area of ​​the MBS service.

[0484] Furthermore, changes not caused by the start of a new MBS service can include: changes to MBS session configuration, termination of an MBS session, and changes to neighboring cells.

[0485] Furthermore, changes to the MBS session configuration may include changes to the service area of ​​the MBS service.

[0486] In one embodiment, the change in the service area corresponding to the MBS service is as follows: the service area corresponding to the MBS service in the MCCH information sent in the current service area modification period is changed compared with the service area corresponding to the MBS service in the MCCH information sent in the previous service area modification period.

[0487] In one embodiment, the MCCH change notification may include a first instruction message, a second instruction message, and a third instruction message.

[0488] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; and the third indication information is used to indicate whether the service area corresponding to the MBS service has changed.

[0489] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0490] When the second indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0491] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0492] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0493] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0494] Furthermore, in the embodiments of this application, the first value of the second indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to 0, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0495] Alternatively, when the second indication information is set to 0, it indicates that a change has occurred that was not caused by the start of a new MBS service; when the second indication information is set to 1, it indicates that no change has occurred that was not caused by the start of a new MBS service.

[0496] Furthermore, in this embodiment, the first value of the third indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0497] Alternatively, when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0498] In one embodiment, the MCCH change notification may include a first instruction message and a fourth instruction message.

[0499] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; or to indicate whether the service area corresponding to the MBS service has changed; or to indicate whether a change has occurred that is not caused by the start of a new MBS service and whether the service area corresponding to the MBS service has changed.

[0500] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0501] When the fourth indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; or that the service area corresponding to the MBS service has changed; or that a change has occurred that was not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0502] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0503] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0504] Furthermore, in this embodiment, the first value of the fourth indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0505] Alternatively, when the fourth indication information is set to 0, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 1, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0506] In one embodiment, the MCCH change notification may include a first instruction message, a fourth instruction message, and a third instruction message.

[0507] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the fourth indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service; or to indicate whether the service area corresponding to the MBS service has changed; or to indicate whether a change has occurred that is not caused by the start of a new MBS service and whether the service area corresponding to the MBS service has changed; the third indication information is used to indicate whether the service area corresponding to the MBS service has changed.

[0508] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0509] When the fourth indication information is set to the first value, it indicates that a change has occurred that was not caused by the start of a new MBS service; or that the service area corresponding to the MBS service has changed; or that a change has occurred that was not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0510] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0511] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0512] Alternatively, when the first indication information is set to 0, it indicates that a new MBS service has started; when the first indication information is set to 1, it indicates that no new MBS service has started.

[0513] Furthermore, in this embodiment, the first value of the fourth indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0514] Alternatively, when the fourth indication information is set to 0, it indicates that a change has occurred that is not caused by the start of a new MBS service; or it indicates that the service area corresponding to the MBS service has changed; or it indicates that a change has occurred that is not caused by the start of a new MBS service and that the service area corresponding to the MBS service has changed; when the fourth indication information is set to 1, it indicates that no change has occurred that is not caused by the start of a new MBS service, and that the service area corresponding to any MBS service has changed.

[0515] Furthermore, in this embodiment, the first value of the third indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0516] Alternatively, when the third indication information is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0517] The MCCH change notification in this application embodiment may include first instruction information and / or second instruction information.

[0518] In one embodiment, the first indication information is used to indicate whether a new MBS service has started; the second indication information is used to indicate whether a change has occurred that is not caused by the start of a new MBS service.

[0519] The second indication information indicates whether a change has occurred that is not caused by the start of a new MBS service, and may include a change in the service area corresponding to the MBS service.

[0520] When the first indication information is set to the first value, it indicates that a new MBS service has started; when the first indication information is set to the second value, it indicates that no new MBS service has started.

[0521] When the second indication information is set to the first value, it indicates a change not caused by the start of a new MBS service, such as a change in MBS session configuration, termination of an MBS session, change of service in a neighboring cell, change of service area corresponding to the MBS service, or change of service area corresponding to the MBS service in the MBS session configuration. When the second indication information is set to the second value, it indicates no change not caused by the start of a new MBS service.

[0522] Specifically, in the embodiments of this application, the first value of the first indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the first indication information is set to 1, it indicates that a new MBS service has started; when the first indication information is set to 0, it indicates that no new MBS service has started.

[0523] Specifically, in the embodiments of this application, the first value of the second indication information can be 1 or 0, and the second value can be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change has occurred that is not caused by the start of a new MBS service; when the second indication information is set to 0, it indicates that no change has occurred that is not caused by the start of a new MBS service.

[0524] In one embodiment, the service area modification period is greater than the MCCH modification period; or the service area modification period is less than the MCCH modification period; or the service area modification period is equal to the MCCH modification period.

[0525] In one embodiment, the service area modification cycle is N times the MCCH modification cycle; N is an integer greater than or equal to 1.

[0526] In one embodiment, the service area corresponding to the MBS service will not change during the same service area modification cycle.

[0527] Figure 7 is a schematic diagram of the structure of an MCCH transmitting device according to an embodiment of this application. As shown in Figure 7, the MCCH transmitting device provided in this embodiment includes:

[0528] The generation module 710 is used to generate indication information, which is used to indicate whether the MCCH information has been changed;

[0529] The sending module 720 sends the indication information.

[0530] In one embodiment, whether the MCCH information has changed includes whether the service area corresponding to the MBS service has changed.

[0531] In one embodiment, the indication information is included in the MCCH change notification;

[0532] Or it may be included in DCI, system messages, MCCH, NAS messages, AS messages, RRC layer signaling, SDAP layer signaling, PDCP layer signaling, RLC layer signaling, MAC layer signaling, or PHY layer signaling;

[0533] Or it may be included in other messages.

[0534] In one embodiment, the indication information is at least 1 bit.

[0535] In one embodiment, when the indication information is set to a first value, it indicates that the service area corresponding to the MBS service has changed;

[0536] When the indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0537] In one embodiment, the MCCH change notification is used to indicate whether the MCCH information has been changed;

[0538] The changes to the MCCH information include at least one of the following: the start of a new MBS service, changes not caused by the start of a new MBS service, or a change in the service area corresponding to the MBS service.

[0539] Furthermore, changes not caused by the commencement of a new MBS service may include: a change in the service area of ​​the MBS service.

[0540] Furthermore, changes not caused by the start of a new MBS service can include: changes to MBS session configuration, termination of an MBS session, and changes to neighboring cells.

[0541] Furthermore, changes to the MBS session configuration may include changes to the service area of ​​the MBS service.

[0542] In one embodiment, the MCCH change notification includes a first indication message, and / or a second indication message, and / or a third indication message, and / or a fourth indication message;

[0543] The first indication information is used to indicate whether a new MBS service has started;

[0544] The second indication information is used to indicate whether a change has occurred that was not caused by the commencement of a new MBS service;

[0545] The third indication information is used to indicate whether the service area corresponding to the MBS service has changed;

[0546] The fourth indication information is used to indicate whether a change has occurred that was not caused by the start of a new MBS service, and / or to indicate whether the service area corresponding to the MBS service has changed.

[0547] In one embodiment, when the first indication information is set to a first value, it indicates that a new MBS service has started.

[0548] When the first indication information is set to the second value, it indicates that no new MBS service has started;

[0549] and / or

[0550] When the second indication information is set to the first value, it indicates that the change was not caused by the start of a new MBS service.

[0551] When the second indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service;

[0552] and / or

[0553] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed.

[0554] When the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed;

[0555] and / or

[0556] When the fourth indication information is set to the first value, it indicates that the change was not caused by the start of a new MBS service, and / or that the service area corresponding to the MBS service has changed.

[0557] When the fourth indication information is set to the second value, it indicates that no changes have occurred that are not caused by the start of a new MBS service, and no service area corresponding to any MBS service has changed.

[0558] In one embodiment, the process of sending an MCCH change notification includes: sending the MCCH change notification starting from the beginning of the MCCH modification period;

[0559] and / or

[0560] During a single MCCH modification cycle, the same MCCH information is transmitted multiple times.

[0561] and / or

[0562] The MCCH change notification is carried by the Physical Downlink Control Channel (PDCCH).

[0563] In one embodiment, the MBS service includes:

[0564] Multicast and / or broadcast services that can be received by terminals in RRC connected state and / or RRC inactive state and / or RRC idle state.

[0565] Figure 8 is a structural schematic diagram of an MCCH transmitting device provided in another embodiment of this application. As shown in Figure 8, the MCCH transmitting device provided in this embodiment includes:

[0566] The generation module 810 is used to generate an MCCH change notification, which is used to indicate whether the MCCH information has been changed.

[0567] The sending module 820 is used to send the MCCH change notification.

[0568] In one embodiment, whether the MCCH information has changed includes whether the service area corresponding to the MBS service has changed.

[0569] In one embodiment, the MCCH change notification indicates, with at least 1 bit, whether the service area corresponding to the MBS service has changed.

[0570] In one embodiment, when the at least 1 bit is set to a first value, it indicates that the service area corresponding to the MBS service has changed;

[0571] When at least one bit is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0572] In one embodiment, the MCCH change notification is used to indicate whether the MCCH information has been changed;

[0573] The changes to the MCCH information include: the start of a new MBS service, changes not caused by the start of a new MBS service, and changes in the service area corresponding to the MBS service.

[0574] Furthermore, changes not caused by the commencement of a new MBS service may include: a change in the service area of ​​the MBS service.

[0575] Furthermore, changes not caused by the start of a new MBS service can include: changes to MBS session configuration, termination of an MBS session, and changes to neighboring cells.

[0576] Furthermore, changes to the MBS session configuration may include a change in the service area of ​​the MBS service. In one embodiment, the MCCH change notification includes a first indication, and / or a second indication, and / or a third indication, and / or a fourth indication.

[0577] The first indication information is used to indicate whether a new MBS service has started;

[0578] The second indication information is used to indicate whether a change has occurred that was not caused by the commencement of a new MBS service;

[0579] The third indication information is used to indicate whether the service area corresponding to the MBS service has changed;

[0580] The fourth indication information is used to indicate whether a change has occurred that was not caused by the start of a new MBS service, and / or to indicate whether the service area corresponding to the MBS service has changed.

[0581] In one embodiment, when the first indication information is set to a first value, it indicates that a new MBS service has started.

[0582] When the first indication information is set to the second value, it indicates that no new MBS service has started;

[0583] and / or

[0584] When the second indication information is set to the first value, it indicates that the change was not caused by the start of a new MBS service.

[0585] When the second indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service;

[0586] and / or

[0587] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed.

[0588] When the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed;

[0589] and / or

[0590] When the fourth indication information is set to the first value, it indicates that the change is not caused by the start of a new MBS service, and / or indicates that the service area corresponding to the MBS service has changed.

[0591] When the fourth indication information is set to the second value, it indicates that no changes have occurred that are not caused by the start of a new MBS service, and no service area corresponding to any MBS service has changed.

[0592] In one embodiment, the process of sending the MCCH change notification includes: sending the MCCH change notification starting from the beginning of the MCCH modification period;

[0593] and / or

[0594] During a single MCCH modification cycle, the same MCCH information is transmitted multiple times.

[0595] and / or

[0596] The MCCH change notification is carried by the Physical Downlink Control Channel (PDCCH).

[0597] In one embodiment, the MBS service includes:

[0598] Multicast and / or broadcast services that can be received by terminals in RRC connected state and / or RRC inactive state and / or RRC idle state.

[0599] The MCCH transmitting device provided in this application embodiment can be used to execute the MCCH transmitting method provided in any of the above embodiments, and has corresponding functions and beneficial effects.

[0600] Figure 9 is a schematic diagram of the structure of an MCCH receiving device provided in an embodiment of this application. As shown in Figure 9, the MCCH receiving device provided in this embodiment includes:

[0601] The receiving module 910 is used to receive indication information, which is used to indicate whether the MCCH information has been changed.

[0602] In one embodiment, whether the MCCH information has changed includes whether the service area corresponding to the MBS service has changed.

[0603] In one embodiment, the indication information is included in the MCCH change notification;

[0604] Or it may be included in DCI, system messages, MCCH, NAS messages, AS messages, RRC layer signaling, SDAP layer signaling, PDCP layer signaling, RLC layer signaling, MAC layer signaling, or PHY layer signaling;

[0605] Or it may be included in other messages.

[0606] In one embodiment, the indication information is at least 1 bit.

[0607] In one embodiment, when the indication information is set to a first value, it indicates that the service area corresponding to the MBS service has changed;

[0608] When the indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0609] In one embodiment, the MCCH change notification is used to indicate whether the MCCH information has been changed;

[0610] The changes to the MCCH information include at least one of the following: the start of a new MBS service, changes not caused by the start of a new MBS service, or a change in the service area corresponding to the MBS service.

[0611] Furthermore, changes not caused by the commencement of a new MBS service may include: a change in the service area of ​​the MBS service.

[0612] Furthermore, changes not caused by the start of a new MBS service can include: changes to MBS session configuration, termination of an MBS session, and changes to neighboring cells.

[0613] Furthermore, changes to the MBS session configuration may include changes to the service area of ​​the MBS service.

[0614] In one embodiment, the MCCH change notification includes a first indication message, and / or a second indication message, and / or a third indication message, and / or a fourth indication message;

[0615] The first indication information is used to indicate whether a new MBS service has started;

[0616] The second indication information is used to indicate whether a change has occurred that was not caused by the commencement of a new MBS service;

[0617] The third indication information is used to indicate whether the service area corresponding to the MBS service has changed;

[0618] The fourth indication information is used to indicate whether a change has occurred that was not caused by the start of a new MBS service, and / or to indicate whether the service area corresponding to the MBS service has changed.

[0619] In one embodiment, when the first indication information is set to a first value, it indicates that a new MBS service has started.

[0620] When the first indication information is set to the second value, it indicates that no new MBS service has started;

[0621] and / or

[0622] When the second indication information is set to the first value, it indicates that the change was not caused by the start of a new MBS service.

[0623] When the second indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service;

[0624] and / or

[0625] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed.

[0626] When the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed;

[0627] and / or

[0628] When the fourth indication information is set to the first value, it indicates that the change was not caused by the start of a new MBS service, and / or that the service area corresponding to the MBS service has changed.

[0629] When the fourth indication information is set to the second value, it indicates that no changes have occurred that are not caused by the start of a new MBS service, and no service area corresponding to any MBS service has changed.

[0630] In one embodiment, the receiving module 910 is further configured to receive the MCCH change notification;

[0631] If the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

[0632] In one example, the receiving module 910 is further configured to receive the MCCH change notification;

[0633] If at least one of the first and / or second and / or third and / or fourth indications included in the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

[0634] In one embodiment, the terminal is not located within the service area corresponding to the MBS service, or the terminal is located within the service area corresponding to the MBS service.

[0635] The receiving module 910 is used to receive the MCCH change notification;

[0636] If the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

[0637] In one embodiment, the terminal is a terminal using the 3GPP R19 version protocol, or the terminal is a terminal using a version protocol prior to 3GPP R19.

[0638] The receiving module 910 is used to receive the MCCH change notification;

[0639] If the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

[0640] In one embodiment, the MBS service includes: multicast and / or broadcast services that can be received by terminals in RRC connected state and / or RRC inactive state and / or RRC idle state.

[0641] Figure 10 is a schematic diagram of the structure of an MCCH receiving device provided in another embodiment of this application. As shown in Figure 10, the MCCH receiving device provided in this embodiment includes:

[0642] The receiving module 1010 is used to receive MCCH change notifications, which are used to indicate whether the MCCH information has been changed.

[0643] In one embodiment, whether the MCCH information has changed includes whether the service area corresponding to the MBS service has changed.

[0644] In one embodiment, the MCCH change notification indicates, with at least 1 bit, whether the service area corresponding to the MBS service has changed.

[0645] In one embodiment, when the at least 1 bit is set to a first value, it indicates that the service area corresponding to the MBS service has changed;

[0646] When at least one bit is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0647] In one embodiment, the MCCH change notification is used to indicate whether the MCCH information has been changed;

[0648] The changes to the MCCH information include: the start of a new MBS service, changes not caused by the start of a new MBS service, and changes in the service area corresponding to the MBS service.

[0649] In one embodiment, the MCCH change notification includes a first indication message, and / or a second indication message, and / or a third indication message, and / or a fourth indication message;

[0650] The first indication information is used to indicate whether a new MBS service has started;

[0651] The second indication information is used to indicate whether a change has occurred that was not caused by the commencement of a new MBS service;

[0652] The third indication information is used to indicate whether the service area corresponding to the MBS service has changed;

[0653] The fourth indication information is used to indicate whether a change has occurred that was not caused by the start of a new MBS service, and / or to indicate whether the service area corresponding to the MBS service has changed.

[0654] In one embodiment, when the first indication information is set to a first value, it indicates that a new MBS service has started;

[0655] When the first indication information is set to the second value, it indicates that no new MBS service has started;

[0656] and / or

[0657] When the second indication information is set to the first value, the indication indicates a change not caused by the start of a new MBS service;

[0658] When the second indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service;

[0659] and / or

[0660] When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed;

[0661] When the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed;

[0662] and / or

[0663] When the fourth indication information is set to the first value, it indicates that the change is not caused by the start of a new MBS service, and / or indicates that the service area corresponding to the MBS service has changed.

[0664] When the fourth indication information is set to the second value, it indicates that no changes have occurred that are not caused by the start of a new MBS service, and no service area corresponding to any MBS service has changed.

[0665] In one embodiment, the receiving module 1010 is further configured to receive the MCCH change notification;

[0666] If the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

[0667] In one embodiment, the receiving module 1010 is further configured to receive the MCCH change notification;

[0668] If at least one of the first and / or second and / or third and / or fourth indications included in the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

[0669] In one embodiment, the terminal is not located within the service area corresponding to the MBS service, or the terminal is located within the service area corresponding to the MBS service.

[0670] The receiving module 1010 receives the MCCH change notification;

[0671] If the MCCH change notification indication changes, receive the MCCH information.

[0672] In one embodiment, the terminal is a terminal using the 3GPP R19 version protocol, or the terminal is a terminal using a version of the protocol prior to 3GPP R19.

[0673] The receiving module 1010 receives the MCCH change notification;

[0674] If the MCCH change notification indication changes, receive the MCCH information.

[0675] In one embodiment, the MBS service includes:

[0676] Multicast and / or broadcast services that can be received by terminals in RRC connected state and / or RRC inactive state and / or RRC idle state.

[0677] The MCCH receiving device provided in this application embodiment can be used to execute the MCCH receiving method provided in any of the above embodiments, and has corresponding functions and beneficial effects.

[0678] The following provides specific embodiments to illustrate the implementation process of the present invention.

[0679] Example 1

[0680] Base station:

[0681] Use MCCH to change notifications to indicate changes in business areas.

[0682] Specifically, this can be achieved by adding 1 bit to the MCCH change notification instruction.

[0683] - When the value is set to 1, it indicates that the service area of ​​one or more services indicated in the MCCH has changed; when the value is set to 0, it indicates that the service areas of all services indicated in the MCCH have not changed; or,

[0684] - When the value is set to 0, it indicates that the service area of ​​one or more services in the services indicated in the MCCH has changed; when the value is set to 1, it indicates that the service area of ​​all services in the services indicated in the MCCH has not changed.

[0685] Optionally, when the network changes (partially) the MCCH information, the network will send the MCCH change notification starting from the beginning of the MCCH modification period to inform the UEs of this change.

[0686] Optionally, the MCCH change notification is carried through PDCCH, which is the PDCCH that schedules the MCCH in each repetition period of this modification cycle.

[0687] Optionally, changes to MCCH information occur only in a specific radio frame, using the concept of a change period. Within a change period, the same MCCH information can be transmitted multiple times, based on a repetition period.

[0688] Optionally, when an MCCH change notification is received, a UE that is receiving or is interested in receiving MBS broadcast services begins acquiring new MCCH information from this time slot. The UE uses the previously acquired MCCH information until it acquires new MCCH information. The MCCH change notification is transmitted via a 2-bit bitmap. When the MSB bit in the 2-bit bitmap is set to 1, it indicates the start of a new MBS service. When the LSB bit in the 2-bit bitmap is set to 1, it indicates a modification of the MCCH information rather than a change caused by the start of a new MBS service, such as a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or a change in neighboring cell information.

[0689] For example, MCCH change notifications are transmitted via a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The second indication information in the 3-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service; for example, a configuration change in an ongoing MBS session(s), the termination of an MBS session(s), or changes to neighbor cell information. The third indication information in the 3-bit bitmap, when set to 1, indicates a change in the service area of ​​the MBS service.

[0690] For example, MCCH change notifications are transmitted via a 2-bit bitmap. The first indication information in the 2-bit bitmap (e.g., the MSB bit), when set to 1, indicates the commencement of a new MBS service. The fourth indication information in the 2-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the commencement of a new MBS service, and / or indicates a change in the service area of ​​the MBS service.

[0691] For example, MCCH change notifications are transmitted via a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The fourth indication information in the 3-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service; for example, a configuration change in an ongoing MBS session(s), the termination of an MBS session(s), or changes to neighbor cell information. The third indication information in the 3-bit bitmap, when set to 1, indicates, and / or indicates a change in the service area of ​​the MBS service.

[0692] For example, MCCH change notifications are transmitted via a 2-bit bitmap. The first indication information in the 2-bit bitmap (e.g., the MSB bit), when set to 1, indicates the start of a new MBS service. The second indication information in the 2-bit bitmap (e.g., the LSB bit), when set to 1, indicates a modification to the MCCH information rather than a change caused by the start of a new MBS service. For example, a configuration change in an ongoing MBS session(s), the termination of an MBS session(s), or a change in neighbor cell information. Changes to the MBS session(s) configuration include indications of a change in the service area of ​​the MBS service. Again, for example, a configuration change in an ongoing MBS session(s), the termination of an MBS session(s), a change in neighbor cell information, or a change in the service area of ​​the MBS service.

[0693] UE:

[0694] For Rel-19 UEs, if the UE is not currently within the service area of ​​any broadcast service of interest, then:

[0695] Receive this instruction message

[0696] - If the service area of ​​one or more services indicated in the MCCH has changed, then the corresponding MCCH is received.

[0697] - If the service area of ​​all services indicated in the MCCH remains unchanged and the MSB indication remains unchanged, then the corresponding MCCH will not be received.

[0698] - If at least one of the indication information and MSB indicates that the MCCH has changed, the corresponding MCCH is received; if neither indication has changed, the corresponding MCCH is not received.

[0699] -First scenario:

[0700] The MCCH change notification contains first instruction information, second information, and third instruction information.

[0701] The UE receives the MCCH change notification and receives the first indication information and the third indication information.

[0702] If at least one of the first and third indication messages indicates that the MCCH has been changed, the MCCH is received.

[0703] If neither the first indication message nor the third indication message indicates that the MCCH has been changed, then the MCCH will not be received.

[0704] -Second scenario:

[0705] The MCCH change notification includes a first instruction message and a fourth instruction message.

[0706] The UE receives the MCCH change notification and receives the first indication information and the fourth indication information.

[0707] If at least one of the first and fourth indication messages indicates that the MCCH has been changed, then the MCCH is received.

[0708] If neither the first nor the fourth instruction indicates that the MCCH has been changed, then the MCCH will not be received.

[0709] -Third scenario:

[0710] The MCCH change notification contains a first instruction, a fourth instruction, and a third instruction.

[0711] The UE receives the MCCH change notification and receives the first indication information and the third indication information.

[0712] If at least one of the first and third indications indicates that the MCCH has been changed, then the MCCH is received.

[0713] If neither the first nor the third instruction indicates that the MCCH has been changed, then the MCCH will not be received.

[0714] The UE receives the MCCH change notification and receives the first indication information and the fourth indication information.

[0715] If at least one of the first and fourth indications indicates that the MCCH has been changed, then the MCCH is received.

[0716] If neither the first nor the fourth instruction indicates that the MCCH has been changed, then the MCCH will not be received.

[0717] The UE receives the MCCH change notification, and receives the first indication information, the fourth indication information, and the third information.

[0718] If at least one of the first, fourth, and third indications indicates that the MCCH has been changed, then the MCCH is received.

[0719] If none of the first, fourth, or third indications indicate that the MCCH has been changed, then the MCCH will not be received.

[0720] - Fourth scenario:

[0721] The MCCH change notification contains a first instruction and a second piece of information.

[0722] The UE receives the MCCH change notification and receives the first indication information and the second indication information.

[0723] If at least one of the first and second indication messages indicates that the MCCH has been changed, the MCCH is received.

[0724] If neither the first indication message nor the second indication message indicates that the MCCH has been changed, then the MCCH will not be received.

[0725] For a Rel-19 UE, if the UE is currently within the service area of ​​one or more broadcast services of interest, then:

[0726] -First scenario:

[0727] The MCCH change notification contains first instruction information, second information, and third instruction information.

[0728] The UE receives the MCCH change notification, and receives the first indication information, the second information, and the third indication information.

[0729] If at least one of the first, second, and third indication messages indicates that the MCCH has been changed, the MCCH is received.

[0730] If none of the first, second, or third indication messages indicate a change in the MCCH, then the MCCH will not be received.

[0731] -Second scenario:

[0732] The MCCH change notification includes a first instruction message and a fourth instruction message.

[0733] The UE receives the MCCH change notification and receives the first indication information and the fourth indication information.

[0734] If at least one of the first and fourth indication messages indicates that the MCCH has been changed, then the MCCH is received.

[0735] If neither the first nor the fourth instruction indicates that the MCCH has been changed, then the MCCH will not be received.

[0736] -Third scenario:

[0737] The MCCH change notification contains a first instruction, a fourth instruction, and a third instruction.

[0738] The UE receives the MCCH change notification, and receives the first indication information, the fourth indication information, and / or the third indication information.

[0739] If at least one of the first, fourth, and third indications indicates that the MCCH has been changed, then the MCCH is received.

[0740] If neither the first nor the fourth instruction indicates that the MCCH has been changed, then the MCCH will not be received.

[0741] If either the first instruction message or the fourth message indicates that the MCCH has been changed, then the MCCH is received; if neither the first instruction message nor the fourth message indicates that the MCCH has been changed, then the MCCH is not received.

[0742] - Fourth scenario:

[0743] The MCCH change notification contains a first instruction and a second piece of information.

[0744] The UE receives the MCCH change notification and receives the first indication information and the second indication information.

[0745] If at least one of the first and second indication messages indicates that the MCCH has been changed, the MCCH is received.

[0746] If neither the first indication message nor the second indication message indicates that the MCCH has been changed, then the MCCH will not be received.

[0747] For Pre Rel-19UE, this newly added indication information will be ignored, then:

[0748] -First scenario:

[0749] The MCCH change notification contains first instruction information, second information, and third instruction information.

[0750] The UE receives the MCCH change notification, and receives the first indication information and the second information (ignoring the third information).

[0751] If either the first indication message or the second indication message indicates that the MCCH has been changed, then the MCCH is received.

[0752] If neither the first indication message nor the second indication message indicates that the MCCH has been changed, then the MCCH will not be received.

[0753] -Second scenario:

[0754] The MCCH change notification includes a first instruction message and a fourth instruction message.

[0755] The UE receives the MCCH change notification and receives the first indication information and the fourth indication information.

[0756] If either the first or fourth instruction indicates that the MCCH has been changed, then the MCCH is received.

[0757] If neither the first nor the fourth instruction indicates that the MCCH has been changed, then the MCCH will not be received.

[0758] -Third scenario:

[0759] The MCCH change notification contains a first instruction, a fourth instruction, and a third instruction.

[0760] The UE receives the MCCH change notification and receives the first indication information and the fourth indication information (ignoring the third indication information).

[0761] If either the first or fourth instruction indicates that the MCCH has been changed, then the MCCH is received.

[0762] If neither the first nor the fourth instruction indicates that the MCCH has been changed, then the MCCH will not be received.

[0763] - Fourth scenario:

[0764] The MCCH change notification contains a first instruction and a second piece of information.

[0765] The UE receives the MCCH change notification and receives the first indication information and the second indication information.

[0766] If at least one of the first and second indication messages indicates that the MCCH has been changed, the MCCH is received.

[0767] If neither the first indication message nor the second indication message indicates that the MCCH has been changed, then the MCCH will not be received.

[0768] In the above situation, if service area information is present when receiving the MCCH, it will be ignored.

[0769] The MCCH is the MCCH scheduled by the PDCCH that carries the indication information.

[0770] Example 2:

[0771] Base station:

[0772] Change the transmission modification cycle for broadcast services within the service area.

[0773] During the same modification cycle, the service area of ​​broadcast services will not change.

[0774] Optionally, the modification period may be larger, smaller, or equal to the existing MCCH modification period.

[0775] Optionally, the modification period can be N times the existing MCCH modification period, where N can be an integer greater than or equal to 1.

[0776] The definition of the LSB bit changes, that is, when set to 1 or 0, it indicates a modification of the MCCH information rather than a change caused by the start of a new MBS service, such as a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), a change of neighbor cell information, or a change of service area.

[0777] The definition of the LSB bit has not changed. That is, when set to 1 or 0, it indicates a modification of the MCCH information rather than a change caused by the start of a new MBS service, such as a configuration change of an ongoing MBS session(s), the termination of an MBS session(s), or a change of neighbor cell information. The configuration change of the MBS session(s) may include a change in the service area.

[0778] UE:

[0779] For Rel-19 UEs, if they are not currently within the service area of ​​any broadcast service of interest, then:

[0780] Receive LSB bits during the aforementioned modification period.

[0781] If the -LSB bit indicator changes, the corresponding MCCH will be received;

[0782] If the -LSB bit does not indicate a change, the corresponding MCCH will not be received.

[0783] Optionally, the LSB bit can be received once during the modification period.

[0784] Receive the MSB bit during the MCCH modification period.

[0785] If the MSB bit indicator changes, the corresponding MCCH will be received;

[0786] If the MSB bit does not indicate a change, the corresponding MCCH will not be received.

[0787] Optionally, the MSB bit can be received once during the MCCH modification period.

[0788] For Rel-19 UEs, if they are currently within the service area of ​​one or more broadcast services of interest, or for Pre-Rel-19 UEs, then:

[0789] Receive LSB bits during the MCCH modification period.

[0790] If the -LSB bit indicator changes, the corresponding MCCH will be received;

[0791] If the -LSB bit does not indicate a change, the corresponding MCCH will not be received.

[0792] Optionally, the LSB bit can be received once during the MCCH modification period.

[0793] This application also provides a base station, including a processor and a memory, wherein the memory is configured to store a computer program, and when the computer program is executed by the processor, the processor enables the processor to implement the instruction information transmission method as described above.

[0794] This application also provides a terminal, including a processor and a memory, wherein the memory is configured to store a computer program, and when the computer program is executed by the processor, the processor enables the processor to implement the above-described method for receiving instruction information.

[0795] This application also provides a computer-readable storage medium including a computer program that, when executed by a processor, causes the processor to implement any of the methods.

[0796] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any other combination. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is 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. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., digital video disc (DVD)), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0797] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented 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 this application.

[0798] The above are merely preferred embodiments of this application and do not limit the embodiments and protection scope of this application. Those skilled in the art should realize that any equivalent substitutions and obvious changes made using the description and illustrations of this application should be included within the protection scope of this application.

Claims

1. A method of transmitting an MCCH, the method comprising: include: Generate indication information, which is used to indicate whether the MCCH information has been changed; Send the instruction information.

2. The method of claim 1, wherein, Whether MCCH information has changed includes whether the service area corresponding to MBS service has changed, and the methods include: Generate indication information, which is used to indicate whether the service area corresponding to the MBS service has changed; Send the instruction information.

3. The method of claim 1, wherein, The instruction information is included in the MCCH change notification; Or it may be included in DCI, system messages, MCCH, NAS messages, AS messages, RRC layer signaling, SDAP layer signaling, PDCP layer signaling, RLC layer signaling, MAC layer signaling, or PHY layer signaling; Or it may be included in other messages.

4. The method of claim 1, wherein, The indication information is at least 1 bit.

5. The method of claim 2, wherein, When the indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; When the indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

6. The method of claim 3, wherein, MCCH change notifications are used to indicate whether MCCH information has changed.

7. The method of claim 1, wherein, The changes to the MCCH information include at least one of the following: the start of a new MBS service, changes not caused by the start of a new MBS service, or a change in the service area corresponding to the MBS service.

8. The method of claim 7, wherein, Changes not caused by the start of a new MBS service include: changes to MBS session configuration, termination of an MBS session, and changes to neighboring cells.

9. The method of claim 7, wherein, Changes not caused by the commencement of new MBS services include: changes in the service area of ​​the MBS service.

10. The method of claim 3, wherein, MCCH change notifications include first instruction information, and / or second instruction information, and / or third instruction information, and / or fourth instruction information; The first indication information is used to indicate whether a new MBS service has started; The second indication information is used to indicate whether a change has occurred that was not caused by the commencement of a new MBS service; The third indication information is used to indicate whether the service area corresponding to the MBS service has changed; The fourth indication information is used to indicate whether a change has occurred that was not caused by the start of a new MBS service, and / or to indicate whether the service area corresponding to the MBS service has changed.

11. The method according to claim 7, characterized in that, When the first indication information is set to the first value, it indicates that a new MBS service has started. When the first indication information is set to the second value, it indicates that no new MBS service has started; and / or When the second indication information is set to the first value, it indicates that the change was not caused by the start of a new MBS service. When the second indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service; and / or When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed. When the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed; and / or When the fourth indication information is set to the first value, it indicates that the change was not caused by the start of a new MBS service, and / or that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no changes have occurred that are not caused by the start of a new MBS service, and no service area corresponding to any MBS service has changed.

12. The method of claim 3, wherein, The process of sending an MCCH change notification includes: The MCCH change notification is sent starting from the beginning of the MCCH modification cycle; and / or During a single MCCH modification cycle, the same MCCH information is transmitted multiple times. and / or The MCCH change notification is carried by the Physical Downlink Control Channel (PDCCH).

13. The method of claim 1, wherein, The MBS service includes: Multicast and / or broadcast services that can be received by terminals in RRC connected state and / or RRC inactive state and / or RRC idle state.

14. A method for transmitting an MCCH, the method comprising: include: Generate an MCCH change notification, which indicates whether the MCCH information has been changed. Send the MCCH change notification.

15. The method of claim 14, wherein, Changes to MCCH information include changes to the service area corresponding to MBS services, and the methods include: Generate an MCCH change notification, which is used to indicate whether the service area corresponding to the MBS service has changed; Send the MCCH change notification.

16. The method of claim 14, wherein, The MCCH change notification indicates whether the MCCH information has been changed using at least 1 bit.

17. The method of claim 14, wherein, When the MCCH change notification is set to the first value, it indicates that the service area corresponding to the MBS service has changed; When the MCCH change notification is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

18. The method according to claim 14, characterized in that, The changes to the MCCH information include: the start of a new MBS service, changes not caused by the start of a new MBS service, and changes in the service area corresponding to the MBS service.

19. The method of claim 18, wherein, Changes not caused by the start of a new MBS service include: changes to MBS session configuration, termination of an MBS session, and changes to neighboring cells.

20. The method of claim 18, wherein, Changes not caused by the commencement of new MBS services include: changes in the service area of ​​the MBS service.

21. The method of claim 14, wherein, The MCCH change notification includes a first indication, and / or a second indication, and / or a third indication, and / or a fourth indication; The first indication information is used to indicate whether a new MBS service has started; The second indication information is used to indicate whether a change has occurred that was not caused by the commencement of a new MBS service; The third indication information is used to indicate whether the service area corresponding to the MBS service has changed; The fourth indication information is used to indicate whether a change has occurred that was not caused by the start of a new MBS service, and / or to indicate whether the service area corresponding to the MBS service has changed.

22. The method according to claim 21, characterized in that, When the first indication information is set to the first value, it indicates that a new MBS service has started. When the first indication information is set to the second value, it indicates that no new MBS service has started; and / or When the second indication information is set to the first value, it indicates that the change was not caused by the start of a new MBS service. When the second indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service; and / or When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed. When the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed; and / or When the fourth indication information is set to the first value, it indicates that the change is not caused by the start of a new MBS service, and / or indicates that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no changes have occurred that are not caused by the start of a new MBS service, and no service area corresponding to any MBS service has changed.

23. The method of claim 14, wherein, The process of sending the MCCH change notification includes: The MCCH change notification is sent starting from the beginning of the MCCH modification cycle; and / or During a single MCCH modification cycle, the same MCCH information is transmitted multiple times. and / or The MCCH change notification is carried by the Physical Downlink Control Channel (PDCCH).

24. The method of claim 14, wherein, The MBS service includes: Multicast and / or broadcast services that can be received by terminals in RRC connected state and / or RRC inactive state and / or RRC idle state.

25. A method for receiving an MCCH, the method comprising: include: The terminal receives an indication message, which indicates whether the MCCH information has been changed.

26. The method of claim 25, wherein, Whether MCCH information has changed includes whether the service area corresponding to MBS service has changed, and the methods include: Receive indication information, which is used to indicate whether the service area corresponding to the MBS service has changed.

27. The method of claim 25, wherein, The instruction information is included in the MCCH change notification; Or it may be included in DCI, system messages, MCCH, NAS messages, AS messages, RRC layer signaling, SDAP layer signaling, PDCP layer signaling, RLC layer signaling, MAC layer signaling, or PHY layer signaling; Or it may be included in other messages.

28. The method of claim 25, wherein, The indication information is at least 1 bit.

29. The method according to claim 25, characterized in that, When the indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; When the indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

30. The method of claim 25, wherein, MCCH change notifications are used to indicate whether MCCH information has changed.

31. The method of claim 25, wherein, The changes to the MCCH information include at least one of the following: the start of a new MBS service, changes not caused by the start of a new MBS service, or a change in the service area corresponding to the MBS service.

32. [Amended pursuant to Rule 26 28.02.2025] The method of claim 31, characterized in that, Changes not caused by the start of a new MBS service include: changes to MBS session configuration, termination of an MBS session, and changes to neighboring cells.

33. The method of claim 31, wherein, Changes not caused by the commencement of a new MBS service include: changes to the service area of ​​the MBS service.

34. The method of claim 27, wherein, The MCCH change notification includes a first indication, and / or a second indication, and / or a third indication, and / or a fourth indication; The first indication information is used to indicate whether a new MBS service has started; The second indication information is used to indicate whether a change has occurred that was not caused by the commencement of a new MBS service; The third indication information is used to indicate whether the service area corresponding to the MBS service has changed; The fourth indication information is used to indicate whether a change has occurred that was not caused by the start of a new MBS service, and / or to indicate whether the service area corresponding to the MBS service has changed.

35. The method according to claim 34, characterized in that, When the first indication information is set to the first value, it indicates that a new MBS service has started. When the first indication information is set to the second value, it indicates that no new MBS service has started; and / or When the second indication information is set to the first value, it indicates that the change was not caused by the start of a new MBS service. When the second indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service; and / or When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed. When the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed; and / or When the fourth indication information is set to the first value, it indicates that the change was not caused by the start of a new MBS service, and / or that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no changes have occurred that are not caused by the start of a new MBS service, and no service area corresponding to any MBS service has changed.

36. The method of claim 27, wherein, Also includes: When the terminal receives an MCCH change notification; Receive the MCCH information.

37. The method of claim 34, wherein, Also includes: The terminal receives the MCCH change notification; If at least one of the first and / or second and / or third and / or fourth indications included in the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

38. The method of claim 27, wherein, The terminal is not within the service area corresponding to the MBS service, or the terminal is within the service area corresponding to the MBS service. The terminal receives the MCCH change notification; If the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

39. The method of claim 27, wherein, The terminal is a terminal using the 3GPP R19 version protocol, or the terminal is a terminal using a version protocol prior to 3GPP R19. The terminal receives the MCCH change notification; If the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

40. The method of claim 25, wherein, The MBS service includes: Multicast and / or broadcast services that can be received by terminals in RRC connected state and / or RRC inactive state and / or RRC idle state.

41. A method for receiving MCCH, the method comprising: include: The terminal receives an MCCH change notification, which indicates whether the MCCH information has been changed.

42. The method of claim 42, wherein, Changes to MCCH information include changes to the service area corresponding to MBS services, and the methods include: The terminal receives an MCCH change notification, which indicates whether the service area corresponding to the MBS service has changed.

43. The method of claim 42, wherein, The MCCH change notification indicates whether the MCCH information has been changed using at least 1 bit.

44. The method of claim 42, wherein, When at least one bit is set to the first value, it indicates that the service area corresponding to the MBS service has changed; When at least one bit is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

45. The method according to claim 42, characterized in that, The changes to the MCCH information include: the start of a new MBS service, changes not caused by the start of a new MBS service, and changes in the service area corresponding to the MBS service.

46. The method of claim 45, wherein, Changes not caused by the start of a new MBS service include: changes to MBS session configuration, termination of an MBS session, and changes to neighboring cells.

47. The method of claim 45, wherein, Changes not caused by the commencement of new MBS services include: changes in the service area of ​​the MBS service.

48. The method of claim 41, wherein, The MCCH change notification includes a first indication, and / or a second indication, and / or a third indication, and / or a fourth indication; The first indication information is used to indicate whether a new MBS service has started; The second indication information is used to indicate whether a change has occurred that was not caused by the commencement of a new MBS service; The third indication information is used to indicate whether the service area corresponding to the MBS service has changed; The fourth indication information is used to indicate whether a change has occurred that was not caused by the start of a new MBS service, and / or to indicate whether the service area corresponding to the MBS service has changed.

49. The method according to claim 48, characterized in that, When the first indication information is set to the first value, it indicates that a new MBS service has started; When the first indication information is set to the second value, it indicates that no new MBS service has started; and / or When the second indication information is set to the first value, the indication indicates a change not caused by the start of a new MBS service; When the second indication information is set to the second value, it indicates that no change has occurred that was not caused by the start of a new MBS service; and / or When the third indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed; When the third indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed; and / or When the fourth indication information is set to the first value, it indicates that the change is not caused by the start of a new MBS service, and / or indicates that the service area corresponding to the MBS service has changed. When the fourth indication information is set to the second value, it indicates that no changes have occurred that are not caused by the start of a new MBS service, and no service area corresponding to any MBS service has changed.

50. The method of claim 41, wherein, Also includes: When the terminal receives an MCCH change notification; Receive the MCCH information.

51. The method of claim 48, wherein, Also includes: The terminal receives the MCCH change notification; If at least one of the first and / or second and / or third and / or fourth indications included in the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

52. The method of claim 41, wherein, The terminal is not within the service area corresponding to the MBS service, or the terminal is within the service area corresponding to the MBS service. The terminal receives the MCCH change notification; If the MCCH change notification indication changes, receive the MCCH information.

53. The method of claim 41, wherein, The terminal is a terminal using the 3GPP R19 version protocol, or the terminal is a terminal using a version protocol prior to 3GPP R19. The terminal receives the MCCH change notification; If the MCCH change notification indication changes, receive the MCCH information.

54. The method of claim 41, wherein, The MBS service includes: Multicast and / or broadcast services that can be received by terminals in RRC connected state and / or RRC inactive state and / or RRC idle state.

55. An MCCH transmitting apparatus, the apparatus comprising: include: The generation module is used to generate indication information, which indicates whether the MCCH information has been changed; The sending module sends the instruction information.

56. An MCCH transmitting apparatus, the apparatus comprising: include: The generation module is used to generate MCCH change notifications, which indicate whether MCCH information has been changed. The sending module is used to send the MCCH change notification.

57. An MCCH receiving apparatus, comprising: include: A receiving module is used to receive indication information, which indicates whether the MCCH information has been changed.

58. An MCCH receiving apparatus, comprising: include: A receiving module is used to receive MCCH change notifications, which indicate whether MCCH information has been changed.

59. A base station comprising a processor and a memory, wherein the processor is configured to: The memory is configured to store a computer program, which, when executed by the processor, causes the processor to implement the MCCH transmission method as described in any one of claims 1-24.

60. A terminal comprising a processor and a memory, wherein, The memory is configured to store a computer program, which, when executed by the processor, causes the processor to implement the MCCH receiving method as described in any one of claims 25-54.

61. A computer readable storage medium comprising a computer program, characterized in that, When the computer program is executed by a processor, it causes the processor to implement the method as described in any one of claims 1-54.

Images