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

Abstract

The invention discloses an MCCH sending method, an MCCH receiving method, an MCCH sending device, an MCCH receiving device, a base station, a terminal and a storage medium. The method comprises the following steps: generating indication information, wherein the indication information is used for indicating whether MCCH information is changed or not; and sending the indication information. According to the technical scheme, whether the MCCH information is changed or not is effectively indicated to the UE by sending the indication information, so that the UE can determine whether the MCCH information is changed or not according to the indication information, and a basis can be provided for determining whether to receive the MCCH information or not, so that the power waste of the UE can be avoided, and the performance of the UE and the user experience are improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular, to a method, device, base station, terminal and storage medium for sending and receiving MCCH. Background Art

[0002] Although 5G has begun commercial use, it is limited by geographical conditions and business models and cannot guarantee network coverage in remote areas of the ocean and land. In order to break through the terrain restrictions, integrating satellite communications with ground networks to form a global seamless three-dimensional network of land, sea, air, and space has become a research hotspot in the current academic and industrial circles. International organizations such as 3GPP and ITU have also established corresponding working groups to conduct standardization research on satellite-ground integration. Among them, the non-terrestrial networks (NTN) project established by 3GPP is committed to integrating satellite communications with 5G and solving the key problem of New Radio (NR) supporting NTN. Its standardization work will lay a technical foundation for 6G satellite-ground integration research. The future integrated network of air, space, and ground will focus on deep integration, combining multiple communication platforms to provide more extensive and diversified communication services.

[0003] MBS services in NTN may correspond to service areas. If a user equipment (UE) is in a service area corresponding to a certain MBS service of interest, the UE may receive the MBS service; if the UE is not in the service area corresponding to the MBS service, the UE may not receive the MBS service.

[0004] However, in the existing technical research, if the MCCH change notification indicates that the MCCH information has changed, since the UE does not know whether the service area corresponding to one or more MBS services of interest has changed, the UE will receive the latest MCCH information to know whether the UE is currently in the service area corresponding to the MBS service. If it is found after receiving the MCCH information that the UE is not in the service area corresponding to any MBS service of interest, it is meaningless for the UE to receive the MCCH information, which will cause a waste of UE power, thereby reducing the performance of the UE and the user experience. Summary of the invention

[0005] In order to solve the above-mentioned problem that it is not possible to effectively indicate whether the MCCH information has changed, the present application provides a MCCH sending and receiving method, device, base station, terminal and storage medium.

[0006] An embodiment of the present application provides a MCCH sending method, including:

[0007] Generate indication information, where the indication information is used to indicate whether MCCH information changes;

[0008] The instruction information is sent.

[0009] An embodiment of the present application provides a MCCH sending method, including:

[0010] Generate an MCCH change notification, where the MCCH change notification is used to indicate whether MCCH information has changed;

[0011] Send the MCCH change notification.

[0012] An embodiment of the present application provides a MCCH receiving method, including:

[0013] Indication information is received, where the indication information is used to indicate whether MCCH information changes.

[0014] An embodiment of the present application provides a MCCH receiving method, including:

[0015] An MCCH change notification is received, where the MCCH change notification is used to indicate whether MCCH information is changed.

[0016] An embodiment of the present application provides an MCCH sending device, including:

[0017] A generating module, used to generate indication information, where the indication information is used to indicate whether the MCCH information is changed;

[0018] A sending module sends the indication information.

[0019] An embodiment of the present application provides an MCCH sending device, including:

[0020] A generating module, used for generating an MCCH change notification, wherein the MCCH change notification is used for indicating whether the MCCH information is changed;

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

[0022] An embodiment of the present application provides an MCCH receiving device, including:

[0023] The receiving module is used to receive indication information, where the indication information is used to indicate whether the MCCH information changes.

[0024] An embodiment of the present application provides an MCCH receiving device, including:

[0025] The receiving module is used to receive an MCCH change notification, where the MCCH change notification is used to indicate whether the MCCH information is changed.

[0026] An embodiment of the present application provides a base station, including:

[0027] one or more processors;

[0028] A 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 above-mentioned MCCH sending method.

[0030] An embodiment of the present application provides a terminal, including:

[0031] one or more processors;

[0032] A 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 above-mentioned MCCH receiving method.

[0034] An embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the above-mentioned MCCH sending method or MCCH receiving method is implemented.

[0035] The embodiments of the present application provide a MCCH sending and receiving method, device, base station, terminal and storage medium. The MCCH sending method includes generating indication information, which is used to indicate whether the MCCH information has changed; and sending the indication information. The above technical solution effectively indicates to the UE whether the MCCH information has changed by sending the indication information, so that the UE can clearly know whether the MCCH information has changed according to the indication information, and can provide a basis for determining whether to receive the MCCH information, thereby avoiding the power waste of the UE and improving the performance and user experience of the UE. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The features, advantages and aspects of the embodiments disclosed in this application will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent 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 A flowchart of a method for sending an MCCH provided in an embodiment of the present application;

[0038] Figure 2 A schematic diagram of the relationship between the MCCH modification period and the repetition period provided in an embodiment of the present application;

[0039] Figure 3A schematic diagram of a flow chart of a MCCH sending method provided in another embodiment of the present application;

[0040] Figure 4 A schematic diagram of the relationship between the service area modification period and the MCCH modification period provided in an embodiment of the present application;

[0041] Figure 5 A flowchart of a MCCH receiving method provided in one embodiment of the present application;

[0042] Figure 6 A flowchart of a MCCH receiving method provided by another embodiment of the present application;

[0043] Figure 7 A schematic diagram of the structure of an MCCH sending device provided in one embodiment of the present application;

[0044] Figure 8 A schematic diagram of the structure of an MCCH sending device provided in another embodiment of the present application;

[0045] Fig. 9 A schematic diagram of the structure of an MCCH receiving device provided in one embodiment of the present application;

[0046] Fig.10 A schematic diagram of the structure of an MCCH receiving device provided in another embodiment of the present application. DETAILED DESCRIPTION

[0047] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only the parts related to the present application, rather than all structures, are shown in the accompanying drawings.

[0048] It should be mentioned before discussing the exemplary embodiments in more detail that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the steps as sequential processes, many of the steps therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of the steps can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0049] In addition, the embodiments in the present application and the features in the embodiments may be combined with each other if there is no conflict.

[0050] MBS services include broadcast services, groupcast services and multicast services. Taking multicast services as an example, multicast services can be transmitted in a point-to-multipoint (PTM) manner, which is characterized by data transmission at a lower data rate. Network nodes can transmit MBS services to multiple UEs, which is more conducive to saving network resources when there are a large number of receiving UEs.

[0051] In the prior art, since the coverage of the access network equipment in the non-terrestrial network is very large, different areas within the coverage may need to transmit different services. Since the UE does not know whether the service area corresponding to the MBS service it is interested in has changed, the UE needs to receive the latest MCCH information to know whether it is currently in the service area corresponding to a certain MBS service it is interested in. If it is found after receiving the MCCH information that the UE is not in the service area corresponding to any MBS service of interest, then it is meaningless for the UE to receive the MCCH information, which will cause power waste of the UE.

[0052] An exemplary application scenario is: for an MBS service in a communication system, it is recorded as MBS1, wherein the service area corresponding to MBS1 is service area 1. Assume that the MBS service that the UE is interested in is MBS1, and assume that the UE is outside service area 1. If the MCCH information changes, the UE does not know whether the change in the MCCH information includes a change in the service area corresponding to MBS1, such as the service area corresponding to MBS1 is changed to service area 1 and service area 2, so 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 at this time does not include a change in the service area corresponding to MBS1, that is, the service area corresponding to MBS1 has not changed, then it is meaningless for the UE to receive the MCCH information outside service area 1, which will cause a waste of UE power, thereby reducing the UE's performance and user experience.

[0053] The present application provides a MCCH sending and receiving method, device, base station, terminal and storage medium. For MBS services, the base station indicates to the UE whether the MCCH information has changed. On this basis, the UE can clearly know whether the MCCH information has changed or not according to the indication information, which can provide a basis for determining whether to receive the MCCH information, thereby avoiding the power waste of the UE and improving the performance and user experience of the UE.

[0054] The user equipment (UE) in the embodiments of the present application may be referred to as a terminal, which may be a mobile terminal, a vehicle-mounted terminal, etc. Among them, UE includes all devices that provide voice and / or data connectivity to users, such as wireless terminal devices, mobile terminal devices, device-to-device communication (D2D) terminal devices, vehicle-to-everything (V2X) terminal devices, machine-to-machine / machine-type communications (M2M / MTC) terminal devices, Internet of Things (IoT) terminal devices, light terminal devices (Light UE), reduced capability UE (REDCAP UE), subscriber unit (Subscriber Unit), subscriber station (Subscriber Station), mobile station (Mobile Station), remote station (Remote Station), access point (Access Point, AP), remote terminal (Remote Terminal), access terminal (Access Terminal), user terminal (User Terminal), user agent (User Agent), or user equipment (User Device), etc. It can also be a user device in a future communication system, which is not limited by this patent.

[0055] The base station in the embodiment of the present application can be a base station in a terrestrial communication network, or a base station in an NTN network. For example, an evolved base station eNB, a next-generation node gNB in ​​an NR system, a road side 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 this.

[0056] The embodiment of the present application provides a MCCH sending method, which is applicable to the case of MCCH sending. Specifically, the MCCH sending method can be executed by a MCCH sending device, which can be implemented by software and / or hardware and integrated in a base station.

[0057] Figure 1 A flowchart of a method for sending an MCCH provided in an embodiment of the present application. The method for sending an MCCH provided in an embodiment of the present application may include the following steps:

[0058] S110, generating indication information, where the indication information is used to indicate whether MCCH information has changed;

[0059] S120: Send instruction information.

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

[0061] In one embodiment, the service area may include an area that can be covered by the sending device under the NTN network connection, or an area in an NTN cell that can be covered by the sending device under the NTN network connection. There may be one or more service areas in the NTN cell.

[0062] In multiple services and multiple service areas, the content indicated by the indication information can enable the UE to clearly know whether the service area corresponding to the MBS service has changed. For example, the indication information can indicate whether the service area corresponding to at least one MBS service has changed. Therefore, in the NTN communication scenario, the UE can clearly know whether the service area corresponding to the MBS service has changed, which can provide a basis for determining whether to receive MCCH information, thereby avoiding UE power waste and improving UE performance and user experience.

[0063] In an exemplary application scenario: for an MBS service in a communication system, it is recorded as MBS1, wherein the service area corresponding to MBS1 is service area 1. Assume that the MBS service that the UE is interested in is MBS1, and assume that the UE is outside service area 1. The UE can know whether the service area corresponding to MBS1 has changed according to the 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 may not receive MCCH information, thereby avoiding UE power waste and improving UE performance and user experience.

[0064] It should be noted that there may be one or more MBS services in the communication system, and the indication information may be an information concept for one MBS service, for example, one indication information may indicate whether a service area corresponding to one MBS service has changed. In addition, the indication information may also be an information concept for multiple MBS services, for example, one indication information may indicate whether service areas corresponding to multiple MBS services have changed.

[0065] It should also be noted that there may be one or more MBS service areas in the communication system, and the indication information may be an information concept for one service area, for example, one indication information may indicate whether a service area corresponding to an MBS service has changed. In addition, the indication information may also be an information concept for multiple service areas, for example, one indication information may indicate whether multiple service areas used by an MBS service have changed. Therefore, in the communication system, multiple indication information may be included.

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

[0067] The indication information may be associated with an MBS service list, where the MBS service list is used to indicate at least one MBS service and a service area corresponding to each MBS service.

[0068] As an example, there are three MBS services in the communication system: MBS1, MBS2 and MBS3, and the indication information may 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 service list is in the following format:

[0070] MBS1

[0071] Area1

[0072] MBS2

[0073] Area2、Area3

[0074] MBS3

[0075] Area3

[0076] The indication information may be associated with a service area list, where the service area list is used to indicate at least one service area and the MBS service corresponding to each service area.

[0077] As an example, there are three service areas in the communication system: Area1, Area2 and Area3, and the indication information may 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 business area list is as follows:

[0079] Area 1

[0080] MBS1

[0081] Area 2

[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] Part of an NTN cell;

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

[0089] a portion of each of the plurality of NTN cells;

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

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

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

[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, the system message may carry an MBS system information block, an NTN system message block, or may carry indication information.

[0095] Further, the indication information may be included in an MBS system information block carried by a system message. For example, the indication information may be included in the MBS configuration information in the MBS system information block, may be included in an NTN system message block carried by a system message, may be included in a dedicated system message block carried by a system message, the dedicated system message block is dedicated to carrying the indication information, and may also be included in other system message blocks carried by the system message.

[0096] The indication information in the embodiment of the present application may be 1 bit or multiple bits. 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.

[0097] In the embodiment of the present application, the first value may be 1 or 0, and the second value may 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 is used to indicate whether the MCCH information is changed. Specifically, the MCCH information change includes at least one of the following: a new MBS service starts, a change not caused by the start of a new MBS service, and a change in the service area corresponding to the MBS service.

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

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

[0102] Furthermore, the change of the MBS session configuration may include: a change of the service area of ​​the MBS service.

[0103] For example, the change of the neighboring cell may be a change of the neighboring cell list, which includes neighboring cells that can transmit one or more broadcast services and / or multicast services in the current cell. The change of the neighboring cell list, for example, a neighboring cell that was previously able to transmit one or more broadcast services in the current cell is changed to a neighboring cell that does not transmit one or more broadcast services in the current cell.

[0104] For example, the change of the neighboring cell may be a change of the neighboring cell assignment in the MBS service configuration information. For example, for a certain MBS service, a neighboring cell in the neighboring cell list was previously able to transmit the MBS service but is now changed to be unable to transmit the MBS service, or was previously unable to transmit the MBS service but is now changed to be able to transmit the MBS service.

[0105] For another example, the change of the neighboring cell may be a change of the regional geographic location information of the neighboring cell; the regional geographic location information may include circular area information, and / or polygonal area information and / or other types of area information. The circular area information includes: reference location information and / or radius; the polygonal area information includes: shape and / or vertex latitude and longitude and / or boundary line location information.

[0106] The MCCH change notification in the embodiment of the present application may include first indication information, and / or second indication information, and / or third indication information, and / or fourth indication information.

[0107] 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 not caused by the start of the new MBS service has occurred; the third indication information is used to indicate whether a service area corresponding to the MBS service has changed; the fourth indication information is used to indicate whether a change not caused by the start of the new MBS service has occurred, and / or indicate whether the service area corresponding to the MBS service has changed.

[0108] In one embodiment, the MCCH change notification may include first indication information, second indication information, and third indication information.

[0109] In one embodiment, the first indication information is used to indicate whether a new MBS service starts; the second indication information is used to indicate whether a change not caused by the start of a new MBS service occurs; and the third indication information is used to indicate whether a service area corresponding to the MBS service changes.

[0110] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0111] When the second indication information is set to the fifth value, it indicates that a change that is not caused by the start of a new MBS service has occurred; when the second indication information is set to the sixth value, it indicates that a change that is not caused by the start of a new MBS service has not occurred.

[0112] When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the eighth value, it indicates that the service area corresponding to the MBS service has not changed.

[0113] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0114] 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.

[0115] In addition, the fifth value in the embodiment of the present application may be 1 or 0, and the sixth value may be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change not caused by the start of a new MBS service has occurred; when the second indication information is set to 0, it indicates that a change not caused by the start of a new MBS service has not occurred.

[0116] Alternatively, when the second indication information is set to 0, it indicates that a change not caused by the start of a new MBS service has occurred; when the second indication information is set to 1, it indicates that a change not caused by the start of a new MBS service has not occurred.

[0117] In addition, the seventh value in the embodiment of the present application may be 1 or 0, and the eighth value may 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.

[0118] 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.

[0119] For example, the MCCH change notification 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), the stop 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 that the service area of ​​the MBS service has changed.

[0120] In one embodiment, the MCCH change notification may include first indication information and fourth indication information.

[0121] 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 not caused by the start of the new MBS service has occurred; or to indicate whether a service area corresponding to the MBS service has changed; or to indicate whether a change not caused by the start of the new MBS service has occurred and whether the service area corresponding to the MBS service has changed.

[0122] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0123] When the fourth indication information is set to a ninth value, it indicates that a change not caused by the start of a new MBS service has occurred; or indicates that a service area corresponding to the MBS service has changed; or indicates that a change not caused by the start of a new MBS service has occurred and indicates that a service area corresponding to the MBS service has changed. When the fourth indication information is set to a tenth value, it indicates that no change not caused by the start of a new MBS service has occurred, and no service area corresponding to any MBS service has changed.

[0124] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0125] 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.

[0126] In addition, the ninth value in the embodiment of the present application may be 1 or 0, and the tenth value may be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change not caused by the start of a new MBS service occurs; or indicates that a service area corresponding to the MBS service changes; or indicates that a change not caused by the start of a new MBS service occurs and indicates that a service area corresponding to the MBS service changes; when the fourth indication information is set to 0, it indicates that no change not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

[0127] 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 a 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 no service area corresponding to the MBS service has changed.

[0128] For example, the MCCH change notification is transmitted via a 2-bit bitmap. The first indication information (e.g., the MSB bit) in the 2-bit bitmap, when set to 1, indicates that a new MBS service has started. The fourth indication information (e.g., the LSB bit) in the 2-bit bitmap, when set to 1, indicates that the MCCH information is modified but not caused by the start of a new MBS service, and / or indicates that the service area of ​​the MBS service has changed.

[0129] In one embodiment, the MCCH change notification may include first indication information, fourth indication information and third indication information.

[0130] 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 not caused by the start of the new MBS service has occurred; or to indicate whether a service area corresponding to the MBS service has changed; or to indicate whether a change not caused by the start of the new MBS service has occurred 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.

[0131] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0132] When the fourth indication information is set to a ninth value, it indicates that a change not caused by the start of a new MBS service has occurred; or indicates that a service area corresponding to the MBS service has changed; or indicates that a change not caused by the start of a new MBS service has occurred and indicates that a service area corresponding to the MBS service has changed. When the fourth indication information is set to a tenth value, it indicates that no change not caused by the start of a new MBS service has occurred, and no service area corresponding to any MBS service has changed.

[0133] When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the eighth value, it indicates that the service area corresponding to the MBS service has not changed.

[0134] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0135] 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.

[0136] In addition, the ninth value in the embodiment of the present application may be 1 or 0, and the tenth value may be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change not caused by the start of a new MBS service occurs; or indicates that a service area corresponding to the MBS service changes; or indicates that a change not caused by the start of a new MBS service occurs and indicates that a service area corresponding to the MBS service changes; when the fourth indication information is set to 0, it indicates that no change not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

[0137] 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 a 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 no service area corresponding to the MBS service has changed.

[0138] In addition, the seventh value in the embodiment of the present application may be 1 or 0, and the eighth value may 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.

[0139] 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.

[0140] For example, the MCCH change notification 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), the stop 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 that the service area of ​​the MBS service has changed.

[0141] The MCCH change notification in the embodiment of the present application may include first indication information and / or second indication information.

[0142] In one embodiment, the first indication information is used to indicate whether a new MBS service starts; and the second indication information is used to indicate whether a change that is not caused by the start of a new MBS service occurs.

[0143] Whether the indication indicated by the second indication information indicates that a change that is not caused by the start of a new MBS service occurs may include that a service area corresponding to the MBS service changes.

[0144] 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.

[0145] When the second indication information is set to the thirteenth value, it indicates that a change not caused by the start of a new MBS service has occurred, such as indicating a change in the MBS session configuration, or stopping the MBS session, or changing the service of the neighboring cell, or changing the service area corresponding to the MBS service, or indicating a change in the 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 that no change not caused by the start of a new MBS service has occurred.

[0146] For example, the 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), a stop of an MBS session(s), or a change in neighboring cell information. The change in the configuration of an MBS session(s) includes an indication of a change in the service area of ​​an MBS service, such as a change in the configuration of an ongoing MBS session(s), a stop of an MBS session(s), or a change in neighboring cell information or a change in the service area of ​​an MBS service.

[0147] In one embodiment, in the process of sending the MCCH change notification, the MCCH change notification may be sent starting from the start position of the MCCH modification period.

[0148] In one embodiment, in one MCCH modification period, the same MCCH information may be transmitted multiple times. Specifically, one MCCH modification period may include multiple repetition periods, and different repetition periods in one MCCH modification period transmit the same MCCH information. In the field of mobile communications, in the LTE system, MCCH (Multimedia Broadcast Multicast Control Channel) is a channel used to transmit MBMS (Multimedia Broadcast Multicast Service) related control information; in the 5G NR system, MCCH (Multicast / Broadcast Control Channel) is a channel used to transmit MBS (Multicast / Broadcast Service) related control information. The MCCH modification period refers to the frequency of information updates or changes on the channel.

[0149] In one embodiment, one MCCH modification period may include multiple repetition periods. Figure 2 A schematic diagram of the relationship between the MCCH modification period and the repetition period provided in an embodiment of the present application. Figure 2 As shown, Figure 2Take an MCCH modification period that includes four repetition periods as an example. This is because the information on the MCCH may need to be broadcast multiple times over a period of time to ensure that all interested users can receive the control information. This can improve the reception success rate, especially in a mobile environment, where some users may not be able to successfully receive the information on the MCCH in one go due to changes in signal strength. In each repetition period, the MCCH will carry the same control information until the next MCCH modification period begins, at which time there may be new or updated information that needs to be broadcast to users. This mechanism helps ensure that even in harsh wireless environments, the relevant control information of the MBMS service can be effectively conveyed to end users.

[0150] In one embodiment, the MCCH change notification may be carried by a physical downlink control channel (PDCCH).

[0151] When the network changes (part of) the MCCH information, the network will inform the UE of this change through the PDCCH starting from the start position of the MCCH modification period. The PDCCH is the PDCCH that schedules the MCCH in each repetition period in this MCCH modification period.

[0152] Taking the MCCH receiving and sending method in LTE as an example, the SC-PTM in LTE adopts a two-level scheduling mechanism. The SIB20 indicates the scheduling information of the SC-MCCH channel, including: modification period, repetition period, offset, first subframe, and duration that may be scheduled. In a subframe in the duration interval, the base station maps the MBS control / scheduling information to the PDSCH resources in the subframe, maps the downlink control information that schedules the PDSCH resources to the PDCCH resources, and scrambles the PDCCH with the 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 the service data of one MBMS, where the SC-MTCH scheduling information may include: scheduling period, offset, and the time interval length (OnDurationTimer) of the duration that may be scheduled, and the length of time the UE waits after successfully receiving a downlink data (drxInactivityTimerSCPTM). The eNB uses G-RNTI to scramble the DCI of the PDCCH that schedules the SC-MTCH, and each MBMS service is assigned a separate G-RNTI. For each MBS service, the base station maps the MBS service data to the PDSCH resources in a subframe in the duration interval, maps the downlink control information that schedules the PDSCH resources to the PDCCH resources, and scrambles the PDCCH with the corresponding G-RNTI. The MCCH transceiver method in 5GNR also adopts a two-level scheduling mechanism, which is similar to the MCCH transceiver method in LTE and will not be repeated here.

[0153] In one embodiment, the MBS service may include: a multicast service and / or a broadcast service that can be received by a terminal in an RRC connected state and / or an RRC inactive state and / or an RRC idle state.

[0154] As an example, for a multicast service that can be received by a UE in an RRC connected state (RRC_CONNECTED), the UE may receive the multicast service based on the MBS configuration information in the service area corresponding to the multicast service when in the RRC_CONNECTED state according to the indication information.

[0155] As an example, for a multicast service that can be received by a UE in an RRC inactive state (RRC_INACTIVE), the UE may 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.

[0156] As an example, for a broadcast service that can be received by a UE in the RRC_CONNECTED, RRC_INACTIVE or RRC_IDLE state, the UE may receive the broadcast service based on the MBS configuration information in the service area corresponding to the broadcast service when in the RRC_CONNECTED, RRC_INACTIVE or RRC_IDLE state according to the indication information.

[0157] The embodiment of the present application provides another MCCH sending method, which is applicable to the case of MCCH sending. Specifically, the MCCH sending method can be executed by an MCCH sending device, which can be implemented by software and / or hardware and integrated in a base station.

[0158] Figure 3 A flowchart of a method for sending an MCCH provided in another embodiment of the present application. The method for sending an MCCH provided in an embodiment of the present application may include the following steps:

[0159] S310, generating an MCCH change notification, where the MCCH change notification is used to indicate whether MCCH information has changed;

[0160] S320. Send MCCH change notification.

[0161] In one embodiment, the change in MCCH information includes a change in a service area corresponding to the MBS service.

[0162] MCCH change notification refers to the notification sent by the network to the UE when the MCCH information changes in the network. This notification mechanism can ensure that the UE is aware of the latest MBMS in a timely manner, thereby ensuring that users can smoothly receive and use MBMS services. When the coverage of the MBS service changes, such as the addition of a new service area or the termination of service in some service areas, the MCCH information will be updated and the corresponding MCCH change notification will be sent out. After receiving this notification, the UE can re-evaluate whether it is located in a valid service area and decide whether to continue to receive the service. In addition to changes in service areas, MCCH change notifications can also include information such as updates to quality of service (QoS) parameters, the start or stop of new services. This information will affect how users use MBS services efficiently.

[0163] In an exemplary application scenario: for an MBS service in a communication system, it is recorded as MBS1, wherein the service area corresponding to MBS1 is service area 1. Assume that the MBS service that the UE is interested in is MBS1, and assume that the UE is outside service area 1. The UE can know whether the service area corresponding to MBS1 has changed according to the 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 may not receive MCCH information, thereby avoiding UE power waste and improving UE performance and user experience.

[0164] In one embodiment, in the MCCH change notification, whether the service area corresponding to the MBS service has changed may be indicated by one bit, or whether the service area corresponding to the MBS service has changed may be indicated by multiple bits.

[0165] In one example, 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.

[0166] In the embodiment of the present application, the first value may be 1 or 0, and the second value may be 0 or 1. For example, when the at least one bit is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the at least one bit is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0167] Alternatively, when the at least one bit is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the at least one bit is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0168] In one embodiment, the MCCH change notification is used to indicate whether the MCCH information is changed. Specifically, the MCCH information change includes at least one of the following: a new MBS service starts, a change not caused by the start of a new MBS service, and a change in the service area corresponding to the MBS service.

[0169] Furthermore, the change not caused by the start of a new MBS service may include: a change in the service area of ​​the MBS service.

[0170] Furthermore, the changes not caused by the start of a new MBS service may include: changes in MBS session configuration, stopping of an MBS session, and changes in neighboring cells.

[0171] Furthermore, the change of the MBS session configuration may include: a change of the service area of ​​the MBS service.

[0172] The MCCH change notification in the embodiment of the present application may include first indication information, and / or second indication information, and / or third indication information, and / or fourth indication information.

[0173] 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 not caused by the start of the new MBS service has occurred; the third indication information is used to indicate whether a service area corresponding to the MBS service has changed; the fourth indication information is used to indicate whether a change not caused by the start of the new MBS service has occurred, and / or indicate whether the service area corresponding to the MBS service has changed.

[0174] In one embodiment, the MCCH change notification may include first indication information, second indication information, and third indication information.

[0175] In one embodiment, the first indication information is used to indicate whether a new MBS service starts; the second indication information is used to indicate whether a change not caused by the start of a new MBS service occurs; and the third indication information is used to indicate whether a service area corresponding to the MBS service changes.

[0176] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0177] When the second indication information is set to the fifth value, it indicates that a change that is not caused by the start of a new MBS service has occurred; when the second indication information is set to the sixth value, it indicates that a change that is not caused by the start of a new MBS service has not occurred.

[0178] When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the eighth value, it indicates that the service area corresponding to the MBS service has not changed.

[0179] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0180] 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.

[0181] In addition, the fifth value in the embodiment of the present application may be 1 or 0, and the sixth value may be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change not caused by the start of a new MBS service has occurred; when the second indication information is set to 0, it indicates that a change not caused by the start of a new MBS service has not occurred.

[0182] Alternatively, when the second indication information is set to 0, it indicates that a change not caused by the start of a new MBS service has occurred; when the second indication information is set to 1, it indicates that a change not caused by the start of a new MBS service has not occurred.

[0183] In addition, the seventh value in the embodiment of the present application may be 1 or 0, and the eighth value may 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.

[0184] 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.

[0185] For example, the MCCH change notification 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), the stop 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 that the service area of ​​the MBS service has changed.

[0186] In one embodiment, the MCCH change notification may include first indication information and fourth indication information.

[0187] 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 not caused by the start of the new MBS service has occurred; or to indicate whether a service area corresponding to the MBS service has changed; or to indicate whether a change not caused by the start of the new MBS service has occurred and whether the service area corresponding to the MBS service has changed.

[0188] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0189] When the fourth indication information is set to a ninth value, it indicates that a change not caused by the start of a new MBS service has occurred; or indicates that a service area corresponding to the MBS service has changed; or indicates that a change not caused by the start of a new MBS service has occurred and indicates that a service area corresponding to the MBS service has changed. When the fourth indication information is set to a tenth value, it indicates that no change not caused by the start of a new MBS service has occurred, and no service area corresponding to any MBS service has changed.

[0190] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0191] 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.

[0192] In addition, the ninth value in the embodiment of the present application may be 1 or 0, and the tenth value may be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change not caused by the start of a new MBS service occurs; or indicates that a service area corresponding to the MBS service changes; or indicates that a change not caused by the start of a new MBS service occurs and indicates that a service area corresponding to the MBS service changes; when the fourth indication information is set to 0, it indicates that no change not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

[0193] 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 a 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 no service area corresponding to the MBS service has changed.

[0194] For example, the MCCH change notification is transmitted via a 2-bit bitmap. The first indication information (e.g., the MSB bit) in the 2-bit bitmap, when set to 1, indicates that a new MBS service has started. The fourth indication information (e.g., the LSB bit) in the 2-bit bitmap, when set to 1, indicates that the MCCH information is modified but not caused by the start of a new MBS service, and / or indicates that the service area of ​​the MBS service has changed.

[0195] In one embodiment, the MCCH change notification may include first indication information, fourth indication information and third indication information.

[0196] 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 not caused by the start of the new MBS service has occurred; or to indicate whether a service area corresponding to the MBS service has changed; or to indicate whether a change not caused by the start of the new MBS service has occurred 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.

[0197] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

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

[0199] When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the eighth value, it indicates that the service area corresponding to the MBS service has not changed.

[0200] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0201] 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.

[0202] In addition, the ninth value in the embodiment of the present application may be 1 or 0, and the tenth value may be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change not caused by the start of a new MBS service occurs; or indicates that a service area corresponding to the MBS service changes; or indicates that a change not caused by the start of a new MBS service occurs and indicates that a service area corresponding to the MBS service changes; when the fourth indication information is set to 0, it indicates that no change not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

[0203] 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 a 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 no service area corresponding to the MBS service has changed.

[0204] In addition, the seventh value in the embodiment of the present application may be 1 or 0, and the eighth value may 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.

[0205] 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.

[0206] For example, the MCCH change notification 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), the stop 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 that the service area of ​​the MBS service has changed.

[0207] The MCCH change notification in the embodiment of the present application may include first indication information and / or second indication information.

[0208] In one embodiment, the first indication information is used to indicate whether a new MBS service starts; and the second indication information is used to indicate whether a change that is not caused by the start of a new MBS service occurs.

[0209] Whether the indication indicated by the second indication information indicates that a change that is not caused by the start of a new MBS service occurs may include that a service area corresponding to the MBS service changes.

[0210] 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.

[0211] When the second indication information is set to the thirteenth value, it indicates that a change not caused by the start of a new MBS service has occurred, such as indicating a change in the MBS session configuration, or stopping the MBS session, or changing the service of the neighboring cell, or changing the service area corresponding to the MBS service, or indicating a change in the 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 that no change not caused by the start of a new MBS service has occurred.

[0212] For example, the 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), a stop of an MBS session(s), or a change in neighboring cell information. The change in the configuration of an MBS session(s) includes an indication that a service area of ​​the MBS service has changed. For another example, the configuration of an ongoing MBS session(s), the stop of an MBS session(s), or a change in neighboring cell information or a change in the service area of ​​the MBS service may be changed.

[0213] In one embodiment, in the process of sending the MCCH change notification, the MCCH change notification may be sent starting from the start position of the MCCH modification period; in one MCCH modification period, the same MCCH information may be transmitted multiple times.

[0214] In one embodiment, an MCCH modification period may include multiple repetition periods, and different repetition periods in an MCCH modification period transmit the same MCCH information. In the field of mobile communications, in the LTE system, MCCH (Multimedia Broadcast Multicast Control Channel) is a channel used to transmit MBMS (Multimedia Broadcast Multicast Service) related control information; in the 5G NR system, MCCH (Multicast / Broadcast Control Channel) is a channel used to transmit MBS (Multicast / Broadcast Service) related control information. The MCCH modification period refers to the frequency at which information on the channel is updated or changed.

[0215] In one embodiment, an MCCH modification period may include multiple repetition periods, because the information on the MCCH may need to be broadcast multiple times over a period of time to ensure that all interested users can receive the control information. This can improve the reception success rate, especially in a mobile environment, where some users may not be able to successfully receive the information on the MCCH in one go due to changes in signal strength. In each repetition period, the MCCH will carry the same control information until the next MCCH modification period begins, at which time new or updated information may need to be broadcast to the user. This mechanism helps ensure that even in harsh wireless environments, the relevant control information of the MBMS service can be effectively conveyed to the terminal user.

[0216] In one embodiment, the MCCH change notification may be carried by a physical downlink control channel PDCCH. When the network changes (part of) the MCCH information, the network will inform the UE of the change via PDCCH starting from the start position of the MCCH modification period, and the PDCCH is the PDCCH that schedules the MCCH in each repetition period of the MCCH modification period.

[0217] Taking the MCCH receiving and sending method in LTE as an example, the SC-PTM in LTE adopts a two-level scheduling mechanism. The SIB20 indicates the scheduling information of the SC-MCCH channel, including: modification period, repetition period, offset, first subframe, and duration that may be scheduled. In a subframe in the duration interval, the base station maps the MBS control / scheduling information to the PDSCH resources in the subframe, maps the downlink control information that schedules the PDSCH resources to the PDCCH resources, and scrambles the PDCCH with the 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 the service data of one MBMS, where the SC-MTCH scheduling information may include: scheduling period, offset, and the time interval length (OnDurationTimer) of the duration that may be scheduled, and the length of time the UE waits after successfully receiving a downlink data (drxInactivityTimerSCPTM). The eNB uses G-RNTI to scramble the DCI of the PDCCH that schedules the SC-MTCH, and each MBMS service is assigned a separate G-RNTI. For each MBS service, the base station maps the MBS service data to the PDSCH resources in a subframe in the duration interval, maps the downlink control information that schedules the PDSCH resources to the PDCCH resources, and scrambles the PDCCH with the corresponding G-RNTI. The MCCH transceiver method in 5GNR also adopts a two-level scheduling mechanism, which is similar to the MCCH transceiver method in LTE and will not be repeated here.

[0218] In one embodiment, the MBS service may include: a multicast service and / or a broadcast service that can be received by a terminal in an RRC connected state and / or an RRC inactive state and / or an RRC idle state.

[0219] As an example, for a multicast service that can be received by a UE in an RRC connected state (RRC_CONNECTED), the UE may receive the multicast service based on the MBS configuration information in the service area corresponding to the multicast service when in the RRC_CONNECTED state according to the indication information.

[0220] As an example, for a multicast service that can be received by a UE in an RRC inactive state (RRC_INACTIVE), the UE may 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.

[0221] As an example, for a broadcast service that can be received by a UE in the RRC_CONNECTED, RRC_INACTIVE or RRC_IDLE state, the UE may receive the broadcast service based on the MBS configuration information in the service area corresponding to the broadcast service when in the RRC_CONNECTED, RRC_INACTIVE or RRC_IDLE state according to the indication information.

[0222] In one embodiment, a service area modification period may also be sent; the service area modification period is carried by a system message.

[0223] In one embodiment, an MCCH change notification is sent in a service area modification period and an MCCH modification period; the MCCH change notification is used to indicate whether the MCCH information has changed; the change in MCCH information includes at least one of the following: the start of a new MBS service, the change not caused by the start of a new MBS service, and the change in the service area corresponding to the MBS service.

[0224] 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 A schematic diagram of the relationship between the service area modification period and the MCCH modification period provided in an embodiment of the present application. Figure 4 Take an MCCH modification cycle containing three repetition cycles as an example. By merging multiple MCCH modification cycles into a larger service area modification cycle, frequent channel configuration and reconfiguration can be reduced, thereby saving network resources. A longer service area modification cycle can also reduce the processing burden of the UE, thereby avoiding UE power waste and improving UE performance and user experience.

[0225] In one embodiment, the change not caused by the start of a new MBS service includes at least one of the following: change of MBS session configuration, stop of MBS session, change of neighbor cell information.

[0226] In one embodiment, the service area corresponding to the MBS service changes 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.

[0227] 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 a service area corresponding to the MBS service has changed; 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 whether the service area corresponding to the MBS service has changed.

[0228] In one embodiment, the MCCH change notification may include first indication information, second indication information and 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 a service area corresponding to the MBS service has changed.

[0229] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0230] When the second indication information is set to the fifth value, it indicates that a change that is not caused by the start of a new MBS service has occurred; when the second indication information is set to the sixth value, it indicates that a change that is not caused by the start of a new MBS service has not occurred.

[0231] When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the eighth value, it indicates that the service area corresponding to the MBS service has not changed.

[0232] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0233] 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.

[0234] In addition, the fifth value in the embodiment of the present application may be 1 or 0, and the sixth value may be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change not caused by the start of a new MBS service has occurred; when the second indication information is set to 0, it indicates that a change not caused by the start of a new MBS service has not occurred.

[0235] Alternatively, when the second indication information is set to 0, it indicates that a change not caused by the start of a new MBS service has occurred; when the second indication information is set to 1, it indicates that a change not caused by the start of a new MBS service has not occurred.

[0236] In addition, the seventh value in the embodiment of the present application may be 1 or 0, and the eighth value may 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.

[0237] 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.

[0238] In one embodiment, the MCCH change notification may include first indication information and fourth indication information.

[0239] 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 not caused by the start of the new MBS service has occurred; or to indicate whether a service area corresponding to the MBS service has changed; or to indicate whether a change not caused by the start of the new MBS service has occurred and whether the service area corresponding to the MBS service has changed.

[0240] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0241] When the fourth indication information is set to a ninth value, it indicates that a change not caused by the start of a new MBS service has occurred; or indicates that a service area corresponding to the MBS service has changed; or indicates that a change not caused by the start of a new MBS service has occurred and indicates that a service area corresponding to the MBS service has changed. When the fourth indication information is set to a tenth value, it indicates that no change not caused by the start of a new MBS service has occurred, and no service area corresponding to any MBS service has changed.

[0242] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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] In addition, the ninth value in the embodiment of the present application may be 1 or 0, and the tenth value may be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change not caused by the start of a new MBS service occurs; or indicates that a service area corresponding to the MBS service changes; or indicates that a change not caused by the start of a new MBS service occurs and indicates that a service area corresponding to the MBS service changes; when the fourth indication information is set to 0, it indicates that no change not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

[0245] 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 a 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 no service area corresponding to the MBS service has changed.

[0246] In one embodiment, the MCCH change notification may include first indication information, fourth indication information and third indication information.

[0247] 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 not caused by the start of the new MBS service has occurred; or to indicate whether a service area corresponding to the MBS service has changed; or to indicate whether a change not caused by the start of the new MBS service has occurred 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.

[0248] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0249] When the fourth indication information is set to a ninth value, it indicates that a change not caused by the start of a new MBS service has occurred; or indicates that a service area corresponding to the MBS service has changed; or indicates that a change not caused by the start of a new MBS service has occurred and indicates that a service area corresponding to the MBS service has changed. When the fourth indication information is set to a tenth value, it indicates that no change not caused by the start of a new MBS service has occurred, and no service area corresponding to any MBS service has changed.

[0250] When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the eighth value, it indicates that the service area corresponding to the MBS service has not changed.

[0251] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0252] 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.

[0253] In addition, the ninth value in the embodiment of the present application may be 1 or 0, and the tenth value may be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change not caused by the start of a new MBS service occurs; or indicates that a service area corresponding to the MBS service changes; or indicates that a change not caused by the start of a new MBS service occurs and indicates that a service area corresponding to the MBS service changes; when the fourth indication information is set to 0, it indicates that no change not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

[0254] 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 a 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 no service area corresponding to the MBS service has changed.

[0255] In addition, the seventh value in the embodiment of the present application may be 1 or 0, and the eighth value may 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.

[0256] 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.

[0257] 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.

[0258] In one embodiment, in the same service area modification cycle, the service area corresponding to the MBS service will not change.

[0259] The embodiment of the present application provides an MCCH receiving method, and the embodiment can be applied to the case of MCCH reception. Specifically, the MCCH receiving method can be performed by an MCCH receiving device, and the MCCH receiving device can be implemented by software and / or hardware and integrated in a terminal. It should be noted that the details not described in detail in this embodiment can be referred to any of the above embodiments.

[0260] Figure 5 A flowchart of a MCCH receiving method provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, the MCCH receiving method provided in the embodiment of the present application may include the following steps:

[0261] S510. The terminal receives indication information, where the indication information is used to indicate whether MCCH information is changed.

[0262] In one embodiment, whether the MCCH information changes includes whether the service area corresponding to the MBS service changes.

[0263] In the MCCH receiving method of this embodiment, the UE determines whether the service area corresponding to the MBS service has changed according to 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.

[0264] In an exemplary application scenario: for an MBS service in a communication system, it is recorded as MBS1, wherein the service area corresponding to MBS1 is service area 1. Assume that the MBS service that the UE is interested in is MBS1, and assume that the UE is outside service area 1. The UE can know whether the service area corresponding to MBS1 has changed according to the 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 may not receive MCCH information, thereby avoiding UE power waste and improving UE performance and user experience.

[0265] 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.

[0266] For example, the system message may carry an MBS system information block, an NTN system message block, or may carry indication information.

[0267] Furthermore, the indication information may be included in an MBS system information block carried by a system message. For example, the indication information may be included in the MBS configuration information in the MBS system information block, may be included in an NTN system message block carried by a system message, may be included in a dedicated system message block carried by a system message, the dedicated system message block is dedicated to carrying the indication information, and may also be included in other system message blocks carried by the system message.

[0268] The indication information in the embodiment of the present application may be 1 bit or multiple bits.

[0269] 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.

[0270] In the embodiment of the present application, the first value may be 1 or 0, and the second value may 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.

[0271] 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.

[0272] In one embodiment, the indication information may be included in an MCCH change notification, and the MCCH change notification is used to indicate whether the MCCH information is changed.

[0273] Specifically, the change in MCCH information includes at least one of the following: a new MBS service starts, a change not caused by the start of a new MBS service, and a change in the service area corresponding to the MBS service.

[0274] Furthermore, the change not caused by the start of a new MBS service may include: a change in the service area of ​​the MBS service.

[0275] Furthermore, the changes not caused by the start of a new MBS service may include: changes in MBS session configuration, stopping of an MBS session, and changes in neighboring cells.

[0276] Furthermore, the change of the MBS session configuration may include: a change of the service area of ​​the MBS service.

[0277] The MCCH change notification in the embodiment of the present application may include first indication information, and / or second indication information, and / or third indication information, and / or fourth indication information.

[0278] 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 not caused by the start of the new MBS service has occurred; the third indication information is used to indicate whether a service area corresponding to the MBS service has changed; the fourth indication information is used to indicate whether a change not caused by the start of the new MBS service has occurred, and / or indicate whether the service area corresponding to the MBS service has changed.

[0279] In one embodiment, the MCCH change notification may include first indication information, second indication information, and third indication information.

[0280] In one embodiment, the first indication information is used to indicate whether a new MBS service starts; the second indication information is used to indicate whether a change not caused by the start of a new MBS service occurs; and the third indication information is used to indicate whether a service area corresponding to the MBS service changes.

[0281] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0282] When the second indication information is set to the fifth value, it indicates that a change that is not caused by the start of a new MBS service has occurred; when the second indication information is set to the sixth value, it indicates that a change that is not caused by the start of a new MBS service has not occurred.

[0283] When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the eighth value, it indicates that the service area corresponding to the MBS service has not changed.

[0284] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0285] 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.

[0286] In addition, the fifth value in the embodiment of the present application may be 1 or 0, and the sixth value may be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change not caused by the start of a new MBS service has occurred; when the second indication information is set to 0, it indicates that a change not caused by the start of a new MBS service has not occurred.

[0287] Alternatively, when the second indication information is set to 0, it indicates that a change not caused by the start of a new MBS service has occurred; when the second indication information is set to 1, it indicates that a change not caused by the start of a new MBS service has not occurred.

[0288] In addition, the seventh value in the embodiment of the present application may be 1 or 0, and the eighth value may 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.

[0289] 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.

[0290] For example, the MCCH change notification 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), the stop 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 that the service area of ​​the MBS service has changed.

[0291] In one embodiment, the MCCH change notification may include first indication information and fourth indication information.

[0292] 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 not caused by the start of the new MBS service has occurred; or to indicate whether a service area corresponding to the MBS service has changed; or to indicate whether a change not caused by the start of the new MBS service has occurred and whether the service area corresponding to the MBS service has changed.

[0293] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0294] When the fourth indication information is set to a ninth value, it indicates that a change not caused by the start of a new MBS service has occurred; or indicates that a service area corresponding to the MBS service has changed; or indicates that a change not caused by the start of a new MBS service has occurred and indicates that a service area corresponding to the MBS service has changed. When the fourth indication information is set to a tenth value, it indicates that no change not caused by the start of a new MBS service has occurred, and no service area corresponding to any MBS service has changed.

[0295] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0296] 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.

[0297] In addition, the ninth value in the embodiment of the present application may be 1 or 0, and the tenth value may be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change not caused by the start of a new MBS service occurs; or indicates that a service area corresponding to the MBS service changes; or indicates that a change not caused by the start of a new MBS service occurs and indicates that a service area corresponding to the MBS service changes; when the fourth indication information is set to 0, it indicates that no change not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

[0298] 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 a 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 no service area corresponding to the MBS service has changed.

[0299] For example, the MCCH change notification is transmitted via a 2-bit bitmap. The first indication information (e.g., the MSB bit) in the 2-bit bitmap, when set to 1, indicates that a new MBS service has started. The fourth indication information (e.g., the LSB bit) in the 2-bit bitmap, when set to 1, indicates that the MCCH information is modified but not caused by the start of a new MBS service, and / or indicates that the service area of ​​the MBS service has changed.

[0300] In one embodiment, the MCCH change notification may include first indication information, fourth indication information and third indication information.

[0301] 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 not caused by the start of the new MBS service has occurred; or to indicate whether a service area corresponding to the MBS service has changed; or to indicate whether a change not caused by the start of the new MBS service has occurred 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.

[0302] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0303] When the fourth indication information is set to a ninth value, it indicates that a change not caused by the start of a new MBS service has occurred; or indicates that a service area corresponding to the MBS service has changed; or indicates that a change not caused by the start of a new MBS service has occurred and indicates that a service area corresponding to the MBS service has changed. When the fourth indication information is set to a tenth value, it indicates that no change not caused by the start of a new MBS service has occurred, and no service area corresponding to any MBS service has changed.

[0304] When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the eighth value, it indicates that the service area corresponding to the MBS service has not changed.

[0305] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0306] 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.

[0307] In addition, the ninth value in the embodiment of the present application may be 1 or 0, and the tenth value may be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change not caused by the start of a new MBS service occurs; or indicates that a service area corresponding to the MBS service changes; or indicates that a change not caused by the start of a new MBS service occurs and indicates that a service area corresponding to the MBS service changes; when the fourth indication information is set to 0, it indicates that no change not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

[0308] 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 a 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 no service area corresponding to the MBS service has changed.

[0309] In addition, the seventh value in the embodiment of the present application may be 1 or 0, and the eighth value may 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.

[0310] 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.

[0311] For example, the MCCH change notification 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), the stop 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 that the service area of ​​the MBS service has changed.

[0312] The MCCH change notification in the embodiment of the present application may include first indication information and / or second indication information.

[0313] In one embodiment, the first indication information is used to indicate whether a new MBS service starts; and the second indication information is used to indicate whether a change that is not caused by the start of a new MBS service occurs.

[0314] Whether the indication indicated by the second indication information indicates that a change that is not caused by the start of a new MBS service occurs may include that a service area corresponding to the MBS service changes.

[0315] 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.

[0316] When the second indication information is set to the thirteenth value, it indicates that a change not caused by the start of a new MBS service has occurred, such as indicating a change in the MBS session configuration, or stopping the MBS session, or changing the service of the neighboring cell, or changing the service area corresponding to the MBS service, or indicating a change in the 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 that no change not caused by the start of a new MBS service has occurred.

[0317] For example, the 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), a stop of an MBS session(s), or a change in neighboring cell information. The change in the configuration of an MBS session(s) includes an indication that a service area of ​​the MBS service has changed. For another example, the configuration of an ongoing MBS session(s), the stop of an MBS session(s), or a change in neighboring cell information or a change in the service area of ​​the MBS service may be changed.

[0318] In one embodiment: when the UE receives the MCCH change notification, the UE may receive MCCH information.

[0319] It should be noted that the MCC change notification mentioned here is actually an MCCH change notification indicating that the MCCH information has changed. Accordingly, after receiving the MCCH change notification, the UE knows that the MCCH information has changed, and therefore receives the MCCH information.

[0320] In an exemplary application scenario: when receiving an MCCH change notification, a UE that is receiving or interested in receiving an MBS broadcast service starts to obtain new MCCH information from this time slot. The UE uses the previously obtained MCCH information until the UE obtains new MCCH information. The MCCH change notification is used to indicate that the MCCH information has changed, and the MCCH change notification is transmitted through a 3-bit bitmap. The first indication information in the 3-bit bitmap (e.g., the MSB bit), when set to 1, indicates that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), the stop 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 that the service area of ​​the MBS service has changed.

[0321] In an exemplary application scenario: when an MCCH change notification is received, a UE that is receiving or interested in receiving an MBS broadcast service acquires new MCCH information starting from this time slot. The UE uses the previously acquired MCCH information until the UE acquires new MCCH information. The MCCH change notification is used to indicate that the MCCH information has changed, and the 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 that a new MBS service has started. 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 that a change has occurred in the service area of ​​the MBS service.

[0322] In an exemplary application scenario: when receiving an MCCH change notification, a UE that is receiving or interested in receiving an MBS broadcast service starts to obtain new MCCH information from this time slot. The UE uses the previously obtained MCCH information until the UE obtains new MCCH information. The MCCH change notification is used to indicate that the MCCH information has changed, and the MCCH change notification is transmitted through a 3-bit bitmap. The first indication information (e.g., the MSB bit) in the 3-bit bitmap, when set to 1, indicates that a new MBS service has started. The fourth indication information (e.g., the LSB bit) in the 3-bit bitmap, when set to 1, indicates a modification of the MCCH information other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), the stop 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 that the service area of ​​the MBS service has changed.

[0323] In an exemplary application scenario: when receiving an MCCH change notification, a UE that is receiving or interested in receiving an MBS broadcast service starts to obtain new MCCH information from this time slot. The UE uses the previously obtained MCCH information until the UE obtains the new MCCH information. The MCCH change notification is transmitted via a 2-bit bitmap. The first indication information (e.g., the MSB bit) in the 2-bit bitmap, when set to 1, indicates that a new MBS service has started. The second indication information (e.g., the LSB bit) in the 2-bit bitmap, when set to 1, indicates a modification of the MCCH information other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), a stop of an MBSsession(s), or a change in neighboring cell information. The change in the configuration of an MBS session(s) may include an indication that a service area of ​​the MBS service has changed. For another example, a change in the configuration of an ongoing MBS session(s), a stop of an MBSsession(s), or a change in neighboring cell information or a change in the service area of ​​the MBS service.

[0324] It should also be noted that the MCCH change notification may also indicate that the MCCH information has not been changed. Accordingly, after receiving such MCCH change notification, the UE knows that the MCCH information has not been changed and may not receive the MCCH information.

[0325] In one embodiment, the UE may receive a MCCH change notification; if the MCCH change notification indicates that the MCCH information has changed, the UE may receive the MCCH information; if the MCCH change notification indicates that the MCCH information has not changed, the UE may not receive the MCCH information.

[0326] In an exemplary application scenario: for an MBS service in a communication system, it is recorded as MBS1, wherein the service area corresponding to MBS1 is service area 1. Assume that the MBS service that the UE is interested in is MBS1, and assume that the UE is outside service area 1. The UE can know that the MCCH information has changed according to the MCCH change notification, such as whether the service area corresponding to MBS1 has changed; if the service area corresponding to MBS1 has changed, accordingly, the MCCH change notification indicates that the MCCH has changed, and after the UE receives the MCCH change notification, the UE will receive the MCCH information; if the MCCH information has not changed, including that the service area corresponding to MBS1 has not changed, then after the UE receives the MCCH change notification, the UE may not receive the MCCH information, thereby avoiding UE power waste and improving UE performance and user experience.

[0327] In one embodiment, the UE may receive a MCCH change notification;

[0328] If at least one of the first indication information and / or the second indication information and / or the third indication information and / or the fourth indication information included in the MCCH change notification indicates that the MCCH information has changed, the UE may receive the MCCH information.

[0329] In one embodiment, the UE may receive a MCCH change notification;

[0330] If at least one of the first indication information and / or the second indication information and / or the third indication information and / or the fourth indication information included in the MCCH change notification indicates that a portion corresponding to the MCCH information has changed, the UE may receive the MCCH information.

[0331] Specifically, the first indication information indicates that the change in the portion corresponding to the MCCH information means that a new MBS service starts;

[0332] The second indication information indicates that the change in the portion corresponding to the MCCH information refers to a change that is not caused by the start of a new MBS service;

[0333] The third indication information indicates that the part corresponding to the MCCH information is changed, which means that the service area corresponding to the MBS service is changed;

[0334] The fourth indication information indicates that a change in the portion corresponding to the MCCH information occurs, which means that a change not caused by the start of a new MBS service occurs, and / or indicates that a service area corresponding to the MBS service changes.

[0335] In an exemplary application scenario: for an MBS service in a communication system, it is recorded as MBS1, wherein the service area corresponding to MBS1 is service area 1. Assume that the MBS service that the UE is interested in is MBS1, and assume that the UE is outside service area 1. The UE can know whether the service area 1 is changed according to at least one of the first indication information and / or the second indication information and / or the third indication information and / or the fourth indication information included in the MCCH change notification; if the service area 1 is changed, the UE can receive the MCCH information.

[0336] It should be noted that the MCCH change notification may also indicate that the MCCH information has not been changed. Accordingly, after receiving such MCCH change notification, the UE knows that the MCCH information has not been changed and may not receive the MCCH information.

[0337] Specifically, if the first indication information, the second indication information, the third indication information, and the fourth indication information included in the MCCH change notification all indicate that the MCCH information has not changed, the UE may not receive the MCCH information.

[0338] In one embodiment, the UE may receive a MCCH change notification;

[0339] If at least one of the first indication information and / or the second indication information and / or the third indication information and / or the fourth indication information included in the MCCH change notification indicates that the corresponding part of the MCCH information has not changed, the UE can receive the MCCH information.

[0340] Specifically, the first indication information indicates that the change in the portion corresponding to the MCCH information means that a new MBS service starts;

[0341] The second indication information indicates that the change in the portion corresponding to the MCCH information refers to a change that is not caused by the start of a new MBS service;

[0342] The third indication information indicates that the part corresponding to the MCCH information is changed, which means that the service area corresponding to the MBS service is changed;

[0343] The fourth indication information indicates that a change in the portion corresponding to the MCCH information occurs, which means that a change not caused by the start of a new MBS service occurs, and / or indicates that a service area corresponding to the MBS service changes.

[0344] In an exemplary application scenario: for an MBS service in a communication system, it is recorded as MBS1, wherein the service area corresponding to MBS1 is service area 1. Assume that the MBS service that the UE is interested in is MBS1, and assume that the UE is outside service area 1. The UE may know whether service area 1 has changed according to at least one of the first indication information and / or the second indication information and / or the third indication information and / or the fourth indication information contained in the MCCH change notification; if service area 1 has not changed, the UE may not receive the MCCH information, thereby avoiding UE power waste and improving UE performance and user experience.

[0345] In one embodiment, the UE is not in the service area corresponding to the MBS service, or the UE is in the service area corresponding to the MBS service, the UE can receive the 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 may not receive the MCCH information.

[0346] In one embodiment, the UE is a UE using a 3GPP R19 version of the protocol, or the UE is a UE using a version of the protocol before 3GPP R19; the UE may receive an MCCH change notification; if the MCCH change notification indicates that the MCCH information has changed, the UE may receive the MCCH information; if the MCCH change notification indicates that the MCCH information has not changed, the UE may not receive the MCCH information.

[0347] An exemplary application scenario is: the UE is a terminal using the 3GPP R19 version protocol, and the UE is not in the service area corresponding to the MBS service:

[0348] 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, 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 may not receive the MCCH information.

[0349] For example, the MCCH change notification 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), the stop 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 that the service area of ​​the MBS service has changed.

[0350] In another embodiment, the MCCH change notification includes first indication information and fourth indication information; the UE can receive the MCCH change notification, 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 may not receive the MCCH information.

[0351] For example, the MCCH change notification is transmitted via a 2-bit bitmap. The first indication information (e.g., the MSB bit) in the 2-bit bitmap, when set to 1, indicates that a new MBS service has started. The fourth indication information (e.g., the LSB bit) in the 2-bit bitmap, when set to 1, indicates that the MCCH information is modified but not caused by the start of a new MBS service, and / or indicates that the service area of ​​the MBS service has changed.

[0352] In another embodiment, the MCCH change notification includes the first indication information, the fourth indication information, and the third indication information. In one example, the UE may receive the MCCH change notification, 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 may 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 may not receive the MCCH information.

[0353] In another example, the UE may receive an MCCH change notification, and receive first indication information and 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 may 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 may not receive the MCCH information.

[0354] In another example, the UE can receive an MCCH change notification, receive the first indication information, the fourth indication information and the third indication information; if at least one of the first indication information, the fourth 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 fourth indication information and the third indication information all indicate that the MCCH information has not changed, the UE may not receive the MCCH information.

[0355] Another exemplary application scenario is: the UE is a terminal using the 3GPP R19 version protocol, and the UE is in a service area corresponding to the MBS service:

[0356] 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, 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 may not receive the MCCH information.

[0357] In another embodiment, the MCCH change notification includes first indication information and fourth indication information; the UE can receive the MCCH change notification, 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 may not receive the MCCH information.

[0358] In another embodiment, the MCCH change notification includes the first indication information, the fourth indication information, and the third indication information. In one example, the UE may receive the MCCH change notification, 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 may 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 may not receive the MCCH information.

[0359] In another example, the UE may receive an MCCH change notification, and receive first indication information and 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 may 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 may not receive the MCCH information.

[0360] In another example, the UE can receive an MCCH change notification, receive the first indication information, the fourth indication information and the third indication information; if at least one of the first indication information, the fourth 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 fourth indication information and the third indication information all indicate that the MCCH information has not changed, the UE may not receive the MCCH information.

[0361] An exemplary application scenario is: the UE is a UE using a protocol version prior to 3GPP R19:

[0362] 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, 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 may not receive the MCCH information.

[0363] In another embodiment, the MCCH change notification includes first indication information and fourth indication information. The UE may receive the MCCH change notification, 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 may 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 may not receive the MCCH information.

[0364] In another embodiment, the MCCH change notification includes the first indication information, the fourth indication information and the third indication information. The UE may receive the MCCH change notification, 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 may 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 may not receive the MCCH information.

[0365] For example, the MCCH change notification 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), the stop 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 that the service area of ​​the MBS service has changed.

[0366] The MCCH change notification in the embodiment of the present application may include first indication information and / or second indication information.

[0367] In one embodiment, the first indication information is used to indicate whether a new MBS service starts; and the second indication information is used to indicate whether a change that is not caused by the start of a new MBS service occurs.

[0368] Whether the indication indicated by the second indication information indicates that a change that is not caused by the start of a new MBS service occurs may include that a service area corresponding to the MBS service changes.

[0369] 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.

[0370] When the second indication information is set to the thirteenth value, it indicates that a change not caused by the start of a new MBS service has occurred, such as indicating a change in the MBS session configuration, or stopping the MBS session, or changing the service of the neighboring cell, or changing the service area corresponding to the MBS service, or indicating a change in the 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 that no change not caused by the start of a new MBS service has occurred.

[0371] For example, the 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), a stop of an MBS session(s), or a change in neighboring cell information. The change in the configuration of an MBS session(s) includes an indication of a change in the service area of ​​an MBS service, such as a change in the configuration of an ongoing MBS session(s), a stop of an MBS session(s), or a change in neighboring cell information or a change in the service area of ​​an MBS service.

[0372] In one embodiment, the MBS service may include: a multicast service and / or a broadcast service that can be received by a terminal in an RRC connected state and / or an RRC inactive state and / or an RRC idle state.

[0373] As an example, for a multicast service that can be received by a UE in an RRC connected state (RRC_CONNECTED), the UE may receive the multicast service based on the MBS configuration information in the service area corresponding to the multicast service when in the RRC_CONNECTED state according to the indication information.

[0374] As an example, for a multicast service that can be received by a UE in an RRC inactive state (RRC_INACTIVE), the UE may 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.

[0375] As an example, for a broadcast service that can be received by a UE in the RRC_CONNECTED, RRC_INACTIVE or RRC_IDLE state, the UE may receive the broadcast service based on the MBS configuration information in the service area corresponding to the broadcast service when in the RRC_CONNECTED, RRC_INACTIVE or RRC_IDLE state according to the indication information.

[0376] The embodiment of the present application provides an MCCH receiving method, and the embodiment can be applied to the case of MCCH reception. Specifically, the MCCH receiving method can be performed by an MCCH receiving device, and the MCCH receiving device can be implemented by software and / or hardware and integrated in a terminal. It should be noted that the details not described in detail in this embodiment can be referred to any of the above embodiments.

[0377] Figure 6 FIG. 1 is a flow chart of a MCCH receiving method provided by another embodiment of the present application. Figure 6 As shown, the MCCH receiving method provided in the embodiment of the present application may include the following steps:

[0378] S610. The UE receives an MCCH change notification, where the MCCH change notification is used to indicate whether MCCH information is changed.

[0379] In one embodiment, the change in MCCH information includes a change in a service area corresponding to the MBS service.

[0380] In one embodiment, the indication information may be included in an MCCH change notification, and the MCCH change notification is used to indicate whether the MCCH information is changed.

[0381] Furthermore, the change not caused by the start of a new MBS service may include: a change in the service area of ​​the MBS service.

[0382] Furthermore, the changes not caused by the start of a new MBS service may include: changes in MBS session configuration, stopping of an MBS session, and changes in neighboring cells.

[0383] Furthermore, the change of the MBS session configuration may include: a change of the service area of ​​the MBS service.

[0384] In one embodiment, in the MCCH change notification, whether the service area corresponding to the MBS service has changed may be indicated by one bit, or whether the service area corresponding to the MBS service has changed may be indicated by multiple bits.

[0385] 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.

[0386] In the embodiment of the present application, the first value may be 1 or 0, and the second value may be 0 or 1. For example, when the at least one bit is set to 1, it indicates that the service area corresponding to the MBS service has changed; when the at least one bit is set to 0, it indicates that the service area corresponding to the MBS service has not changed.

[0387] Alternatively, when the at least one bit is set to 0, it indicates that the service area corresponding to the MBS service has changed; when the at least one bit is set to 1, it indicates that the service area corresponding to the MBS service has not changed.

[0388] In one embodiment, the MCCH change notification is used to indicate whether the MCCH information is changed.

[0389] Furthermore, the change not caused by the start of a new MBS service may include: a change in the service area of ​​the MBS service.

[0390] Specifically, the change in MCCH information includes at least one of the following: a new MBS service starts, a change not caused by the start of a new MBS service, and a change in the service area corresponding to the MBS service.

[0391] Furthermore, the changes not caused by the start of a new MBS service may include: changes in MBS session configuration, stopping of an MBS session, and changes in neighboring cells.

[0392] Furthermore, the change of the MBS session configuration may include: a change of the service area of ​​the MBS service.

[0393] The MCCH change notification in the embodiment of the present application may include 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 a service area corresponding to the MBS service has changed; 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 indicate whether the service area corresponding to the MBS service has changed.

[0394] In one embodiment, the MCCH change notification may include first indication information, second indication information, and third indication information.

[0395] In one embodiment, the first indication information is used to indicate whether a new MBS service starts; the second indication information is used to indicate whether a change not caused by the start of a new MBS service occurs; and the third indication information is used to indicate whether a service area corresponding to the MBS service changes.

[0396] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0397] When the second indication information is set to the fifth value, it indicates that a change that is not caused by the start of a new MBS service has occurred; when the second indication information is set to the sixth value, it indicates that a change that is not caused by the start of a new MBS service has not occurred.

[0398] When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the eighth value, it indicates that the service area corresponding to the MBS service has not changed.

[0399] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0400] 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.

[0401] In addition, the fifth value in the embodiment of the present application may be 1 or 0, and the sixth value may be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change not caused by the start of a new MBS service has occurred; when the second indication information is set to 0, it indicates that a change not caused by the start of a new MBS service has not occurred.

[0402] Alternatively, when the second indication information is set to 0, it indicates that a change not caused by the start of a new MBS service has occurred; when the second indication information is set to 1, it indicates that a change not caused by the start of a new MBS service has not occurred.

[0403] In addition, the seventh value in the embodiment of the present application may be 1 or 0, and the eighth value may 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.

[0404] 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.

[0405] For example, the MCCH change notification 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), the stop 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 that the service area of ​​the MBS service has changed.

[0406] In one embodiment, the MCCH change notification may include first indication information and fourth indication information.

[0407] 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 not caused by the start of the new MBS service has occurred; or to indicate whether a service area corresponding to the MBS service has changed; or to indicate whether a change not caused by the start of the new MBS service has occurred and whether the service area corresponding to the MBS service has changed.

[0408] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0409] When the fourth indication information is set to a ninth value, it indicates that a change not caused by the start of a new MBS service has occurred; or indicates that a service area corresponding to the MBS service has changed; or indicates that a change not caused by the start of a new MBS service has occurred and indicates that a service area corresponding to the MBS service has changed. When the fourth indication information is set to a tenth value, it indicates that no change not caused by the start of a new MBS service has occurred, and no service area corresponding to any MBS service has changed.

[0410] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0411] 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.

[0412] In addition, the ninth value in the embodiment of the present application may be 1 or 0, and the tenth value may be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change not caused by the start of a new MBS service occurs; or indicates that a service area corresponding to the MBS service changes; or indicates that a change not caused by the start of a new MBS service occurs and indicates that a service area corresponding to the MBS service changes; when the fourth indication information is set to 0, it indicates that no change not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

[0413] 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 a 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 no service area corresponding to the MBS service has changed.

[0414] For example, the MCCH change notification is transmitted via a 2-bit bitmap. The first indication information (e.g., the MSB bit) in the 2-bit bitmap, when set to 1, indicates that a new MBS service has started. The fourth indication information (e.g., the LSB bit) in the 2-bit bitmap, when set to 1, indicates that the MCCH information is modified but not caused by the start of a new MBS service, and / or indicates that the service area of ​​the MBS service has changed.

[0415] In one embodiment, the MCCH change notification may include first indication information, fourth indication information and third indication information.

[0416] 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 not caused by the start of the new MBS service has occurred; or to indicate whether a service area corresponding to the MBS service has changed; or to indicate whether a change not caused by the start of the new MBS service has occurred 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.

[0417] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0418] When the fourth indication information is set to a ninth value, it indicates that a change not caused by the start of a new MBS service has occurred; or indicates that a service area corresponding to the MBS service has changed; or indicates that a change not caused by the start of a new MBS service has occurred and indicates that a service area corresponding to the MBS service has changed. When the fourth indication information is set to a tenth value, it indicates that no change not caused by the start of a new MBS service has occurred, and no service area corresponding to any MBS service has changed.

[0419] When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the eighth value, it indicates that the service area corresponding to the MBS service has not changed.

[0420] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0421] 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.

[0422] In addition, the ninth value in the embodiment of the present application may be 1 or 0, and the tenth value may be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change not caused by the start of a new MBS service occurs; or indicates that a service area corresponding to the MBS service changes; or indicates that a change not caused by the start of a new MBS service occurs and indicates that a service area corresponding to the MBS service changes; when the fourth indication information is set to 0, it indicates that no change not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

[0423] 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 a 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 no service area corresponding to the MBS service has changed.

[0424] In addition, the seventh value in the embodiment of the present application may be 1 or 0, and the eighth value may 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.

[0425] 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.

[0426] For example, the MCCH change notification 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), the stop 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 that the service area of ​​the MBS service has changed.

[0427] The MCCH change notification in the embodiment of the present application may include first indication information and / or second indication information.

[0428] In one embodiment, the first indication information is used to indicate whether a new MBS service starts; and the second indication information is used to indicate whether a change that is not caused by the start of a new MBS service occurs.

[0429] Whether the indication indicated by the second indication information indicates that a change that is not caused by the start of a new MBS service occurs may include that a service area corresponding to the MBS service changes.

[0430] 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.

[0431] When the second indication information is set to the thirteenth value, it indicates that a change not caused by the start of a new MBS service has occurred, such as indicating a change in the MBS session configuration, or stopping the MBS session, or changing the service of the neighboring cell, or changing the service area corresponding to the MBS service, or indicating a change in the 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 that no change not caused by the start of a new MBS service has occurred.

[0432] For example, the 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), a stop of an MBS session(s), or a change in neighboring cell information. The change in the configuration of an MBS session(s) includes indicating a change in the service area of ​​the MBS service, such as a change in the configuration of an ongoing MBS session(s), a stop of an MBS session(s), a change in neighboring cell information, or a change in the service area of ​​the MBS service.

[0433] In one embodiment, the UE may receive a MCCH change notification; if the MCCH change notification indicates that the MCCH information has changed, the UE may receive the MCCH information; if the MCCH change notification indicates that the MCCH information has not changed, the UE may not receive the MCCH information.

[0434] In an exemplary application scenario: for an MBS service in a communication system, it is recorded as MBS1, wherein the service area corresponding to MBS1 is service area 1. Assume that the MBS service that the UE is interested in is MBS1, and assume that the UE is outside service area 1. The UE can know whether the service area corresponding to MBS1 has changed according to the MCCH change notification; 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 may not receive MCCH information, thereby avoiding UE power waste and improving UE performance and user experience.

[0435] In one embodiment, the UE may receive an MCCH change notification; if at least one of the first indication information and / or the second indication information and / or the third indication information and / or the fourth indication information contained in the MCCH change notification indicates that the MCCH information has changed, the UE may receive the MCCH information; if the first indication information and the second indication information and the third indication information and the fourth indication information contained in the MCCH change notification all indicate that the MCCH information has not changed, the UE may not receive the MCCH information.

[0436] In an exemplary application scenario: for an MBS service in a communication system, it is recorded as MBS1, wherein the service area corresponding to MBS1 is service area 1. Assume that the MBS service that 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 according to at least one of the first indication information and / or the second indication information and / or the third indication information and / or the fourth indication information contained in the MCCH change notification; if service area 1 has changed, the UE can receive MCCH information; if service area 1 has not changed, the UE may not receive MCCH information, thereby avoiding UE power waste and improving UE performance and user experience.

[0437] In one embodiment, the UE is not in the service area corresponding to the MBS service, or the UE is in the service area corresponding to the MBS service, the UE can receive the 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 may not receive the MCCH information.

[0438] In one embodiment, the UE is a UE using a 3GPP R19 version of the protocol, or the UE is a UE using a version of the protocol before 3GPP R19; the UE may receive an MCCH change notification; if the MCCH change notification indicates that the MCCH information has changed, the UE may receive the MCCH information; if the MCCH change notification indicates that the MCCH information has not changed, the UE may not receive the MCCH information.

[0439] An exemplary application scenario is: the UE is a terminal using the 3GPP R19 version protocol, and the UE is not in the service area corresponding to the MBS service:

[0440] 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, 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 may not receive the MCCH information.

[0441] In another embodiment, the MCCH change notification includes first indication information and fourth indication information; the UE can receive the MCCH change notification, 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 may not receive the MCCH information.

[0442] In another embodiment, the MCCH change notification includes the first indication information, the fourth indication information, and the third indication information. In one example, the UE may receive the MCCH change notification, 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 may 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 may not receive the MCCH information.

[0443] In another example, the UE may receive an MCCH change notification, and receive first indication information and 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 may 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 may not receive the MCCH information.

[0444] In another example, the UE can receive an MCCH change notification, receive the first indication information, the fourth indication information and the third indication information; if at least one of the first indication information, the fourth 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 fourth indication information and the third indication information all indicate that the MCCH information has not changed, the UE may not receive the MCCH information.

[0445] Another exemplary application scenario is: the UE is a terminal using the 3GPP R19 version protocol, and the UE is in a service area corresponding to the MBS service:

[0446] 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, 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 may not receive the MCCH information.

[0447] In another embodiment, the MCCH change notification includes first indication information and fourth indication information; the UE can receive the MCCH change notification, 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 may not receive the MCCH information.

[0448] In another embodiment, the MCCH change notification includes the first indication information, the fourth indication information, and the third indication information. In one example, the UE may receive the MCCH change notification, 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 may 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 may not receive the MCCH information.

[0449] In another example, the UE may receive an MCCH change notification, and receive first indication information and 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 may 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 may not receive the MCCH information.

[0450] In another example, the UE can receive an MCCH change notification, receive the first indication information, the fourth indication information and the third indication information; if at least one of the first indication information, the fourth 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 fourth indication information and the third indication information all indicate that the MCCH information has not changed, the UE may not receive the MCCH information.

[0451] An exemplary application scenario is: the UE is a UE using a protocol version prior to 3GPP R19:

[0452] 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, 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 may not receive the MCCH information.

[0453] In another embodiment, the MCCH change notification includes first indication information and fourth indication information. The UE may receive the MCCH change notification, 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 may 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 may not receive the MCCH information.

[0454] In another embodiment, the MCCH change notification includes the first indication information, the fourth indication information and the third indication information. The UE may receive the MCCH change notification, 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 may 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 may not receive the MCCH information.

[0455] In one embodiment, the MBS service may include: a multicast service and / or a broadcast service that can be received by a terminal in an RRC connected state and / or an RRC inactive state and / or an RRC idle state.

[0456] As an example, for a multicast service that can be received by a UE in an RRC connected state (RRC_CONNECTED), the UE may receive the multicast service based on the MBS configuration information in the service area corresponding to the multicast service when in the RRC_CONNECTED state according to the indication information.

[0457] As an example, for a multicast service that can be received by a UE in an RRC inactive state (RRC_INACTIVE), the UE may 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.

[0458] As an example, for a broadcast service that can be received by a UE in the RRC_CONNECTED, RRC_INACTIVE or RRC_IDLE state, the UE may receive the broadcast service based on the MBS configuration information in the service area corresponding to the broadcast service when in the RRC_CONNECTED, RRC_INACTIVE or RRC_IDLE state according to the indication information.

[0459] In one embodiment, the terminal may also modify the service area period; the service area modification period is carried by a system message.

[0460] In one embodiment, the terminal receives an MCCH change notification in a service area modification period and an MCCH modification period; the MCCH change notification is used to indicate whether the MCCH information has changed; the change in MCCH information includes at least one of the following: the start of a new MBS service, the change not caused by the start of a new MBS service, and the change in the service area corresponding to the MBS service.

[0461] Furthermore, the change not caused by the start of a new MBS service may include: a change in the service area of ​​the MBS service.

[0462] Furthermore, the changes not caused by the start of a new MBS service may include: changes in MBS session configuration, stopping of an MBS session, and changes in neighboring cells.

[0463] Furthermore, the change of the MBS session configuration may include: a change of the service area of ​​the MBS service.

[0464] In one embodiment, the service area corresponding to the MBS service changes 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.

[0465] In one embodiment, the MCCH change notification may include first indication information, second indication information, and third indication information.

[0466] In one embodiment, the first indication information is used to indicate whether a new MBS service starts; the second indication information is used to indicate whether a change not caused by the start of a new MBS service occurs; and the third indication information is used to indicate whether a service area corresponding to the MBS service changes.

[0467] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0468] When the second indication information is set to the fifth value, it indicates that a change that is not caused by the start of a new MBS service has occurred; when the second indication information is set to the sixth value, it indicates that a change that is not caused by the start of a new MBS service has not occurred.

[0469] When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the eighth value, it indicates that the service area corresponding to the MBS service has not changed.

[0470] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0471] 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.

[0472] In addition, the fifth value in the embodiment of the present application may be 1 or 0, and the sixth value may be 0 or 1. For example, when the second indication information is set to 1, it indicates that a change not caused by the start of a new MBS service has occurred; when the second indication information is set to 0, it indicates that a change not caused by the start of a new MBS service has not occurred.

[0473] Alternatively, when the second indication information is set to 0, it indicates that a change not caused by the start of a new MBS service has occurred; when the second indication information is set to 1, it indicates that a change not caused by the start of a new MBS service has not occurred.

[0474] In addition, the seventh value in the embodiment of the present application may be 1 or 0, and the eighth value may 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.

[0475] 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.

[0476] In one embodiment, the MCCH change notification may include first indication information and fourth indication information.

[0477] 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 not caused by the start of the new MBS service has occurred; or to indicate whether a service area corresponding to the MBS service has changed; or to indicate whether a change not caused by the start of the new MBS service has occurred and whether the service area corresponding to the MBS service has changed.

[0478] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0479] When the fourth indication information is set to a ninth value, it indicates that a change not caused by the start of a new MBS service has occurred; or indicates that a service area corresponding to the MBS service has changed; or indicates that a change not caused by the start of a new MBS service has occurred and indicates that a service area corresponding to the MBS service has changed. When the fourth indication information is set to a tenth value, it indicates that no change not caused by the start of a new MBS service has occurred, and no service area corresponding to any MBS service has changed.

[0480] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0481] 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.

[0482] In addition, the ninth value in the embodiment of the present application may be 1 or 0, and the tenth value may be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change not caused by the start of a new MBS service occurs; or indicates that a service area corresponding to the MBS service changes; or indicates that a change not caused by the start of a new MBS service occurs and indicates that a service area corresponding to the MBS service changes; when the fourth indication information is set to 0, it indicates that no change not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

[0483] 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 a 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 no service area corresponding to the MBS service has changed.

[0484] In one embodiment, the MCCH change notification may include first indication information, fourth indication information and third indication information.

[0485] 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 not caused by the start of the new MBS service has occurred; or to indicate whether a service area corresponding to the MBS service has changed; or to indicate whether a change not caused by the start of the new MBS service has occurred 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.

[0486] When the first indication information is set to the third value, it indicates that a new MBS service has started; when the first indication information is set to the fourth value, it indicates that no new MBS service has started.

[0487] When the fourth indication information is set to a ninth value, it indicates that a change not caused by the start of a new MBS service has occurred; or indicates that a service area corresponding to the MBS service has changed; or indicates that a change not caused by the start of a new MBS service has occurred and indicates that a service area corresponding to the MBS service has changed. When the fourth indication information is set to a tenth value, it indicates that no change not caused by the start of a new MBS service has occurred, and no service area corresponding to any MBS service has changed.

[0488] When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed; when the third indication information is set to the eighth value, it indicates that the service area corresponding to the MBS service has not changed.

[0489] Specifically, the third value in the embodiment of the present application may be 1 or 0, and the fourth value may 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.

[0490] 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.

[0491] In addition, the ninth value in the embodiment of the present application may be 1 or 0, and the tenth value may be 0 or 1. For example, when the fourth indication information is set to 1, it indicates that a change not caused by the start of a new MBS service occurs; or indicates that a service area corresponding to the MBS service changes; or indicates that a change not caused by the start of a new MBS service occurs and indicates that a service area corresponding to the MBS service changes; when the fourth indication information is set to 0, it indicates that no change not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

[0492] 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 a 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 no service area corresponding to the MBS service has changed.

[0493] In addition, the seventh value in the embodiment of the present application may be 1 or 0, and the eighth value may 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.

[0494] 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.

[0495] 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.

[0496] 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.

[0497] In one embodiment, in the same service area modification cycle, the service area corresponding to the MBS service will not change.

[0498] Figure 7 This is a schematic diagram of the structure of the MCCH sending device provided in one embodiment of the present application. Figure 7 As shown, the MCCH sending device provided in this embodiment includes:

[0499] A generating module 710 is used to generate indication information, where the indication information is used to indicate whether the MCCH information is changed;

[0500] The sending module 720 sends the indication information.

[0501] In one embodiment, whether the MCCH information changes includes whether the service area corresponding to the MBS service changes.

[0502] In one embodiment, the indication information is included in the MCCH change notification;

[0503] or contained in DCI, system message, MCCH, NAS message, AS message, RRC layer signaling, SDAP layer signaling, PDCP layer signaling, RLC layer signaling, MAC layer signaling or PHY layer signaling;

[0504] Or included in other messages.

[0505] In one embodiment, the indication information is at least 1 bit.

[0506] In one embodiment, when the indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed;

[0507] When the indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0508] In one embodiment, the MCCH change notification is used to indicate whether the MCCH information is changed;

[0509] The change of the MCCH information includes at least one of the following: a new MBS service starts, a change not caused by the start of a new MBS service, and a change in the service area corresponding to the MBS service.

[0510] 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;

[0511] The first indication information is used to indicate whether a new MBS service starts;

[0512] The second indication information is used to indicate whether a change not caused by the start of a new MBS service occurs;

[0513] The third indication information is used to indicate whether the service area corresponding to the MBS service has changed;

[0514] The fourth indication information is used to indicate whether a change that is not caused by the start of a new MBS service occurs, and / or to indicate whether a service area corresponding to the MBS service changes.

[0515] In one embodiment, when the first indication information is set to the third value, it indicates that a new MBS service has started.

[0516] When the first indication information is set to a fourth value, it indicates that no new MBS service is started;

[0517] and / or

[0518] When the second indication information is set to the fifth value, it indicates that a change not caused by the start of a new MBS service occurs.

[0519] When the second indication information is set to a sixth value, it indicates that no change that is not caused by the start of a new MBS service occurs;

[0520] and / or

[0521] When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed.

[0522] When the third indication information is set to an eighth value, it indicates that the service area corresponding to the MBS service has not changed;

[0523] and / or

[0524] When the fourth indication information is set to a ninth value, it indicates that a change not caused by the start of a new MBS service occurs, and / or indicates that a service area corresponding to the MBS service changes.

[0525] When the fourth indication information is set to the tenth value, it indicates that no change that is not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

[0526] In one embodiment, the process of sending the MCCH change notification includes: sending the MCCH change notification starting from the start position of the MCCH modification period;

[0527] and / or

[0528] In one MCCH modification period, the same MCCH information is transmitted multiple times;

[0529] and / or

[0530] The MCCH change notification is carried by the physical downlink control channel PDCCH.

[0531] In one embodiment, the MBS service includes:

[0532] A multicast service and / or a broadcast service that can be received by a terminal in an RRC connected state and / or an RRC inactive state and / or an RRC idle state.

[0533] Figure 8 This is a schematic diagram of the structure of an MCCH sending device provided in another embodiment of the present application. Figure 8 As shown, the MCCH sending device provided in this embodiment includes:

[0534] A generating module 810 is used to generate an MCCH change notification, where the MCCH change notification is used to indicate whether MCCH information has changed;

[0535] The sending module 820 is configured to send the MCCH change notification.

[0536] In one embodiment, whether the MCCH information changes includes whether the service area corresponding to the MBS service changes.

[0537] In one embodiment, in the MCCH change notification, at least one bit is used to indicate whether the service area corresponding to the MBS service is changed.

[0538] In one embodiment, when the at least one bit is set to the first value, it indicates that the service area corresponding to the MBS service changes;

[0539] When the at least one bit is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0540] In one embodiment, the MCCH change notification is used to indicate whether the MCCH information is changed;

[0541] The change of the MCCH information includes: a new MBS service starts, a change not caused by the start of a new MBS service, and a change in the service area corresponding to the MBS service.

[0542] 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;

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

[0544] The second indication information is used to indicate whether a change not caused by the start of a new MBS service occurs;

[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 that is not caused by the start of a new MBS service occurs, and / or to indicate whether a service area corresponding to the MBS service changes.

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

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

[0549] and / or

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

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

[0552] and / or

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

[0554] When the third indication information is set to an eighth 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 a ninth value, it indicates that a change not caused by the start of a new MBS service occurs, and / or indicates that a service area corresponding to the MBS service changes;

[0557] When the fourth indication information is set to the tenth value, it indicates that no change that is not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

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

[0559] and / or

[0560] In one MCCH modification period, 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] A multicast service and / or a broadcast service that can be received by a terminal in an RRC connected state and / or an RRC inactive state and / or an RRC idle state.

[0565] The MCCH sending device provided in the embodiments of the present application can be used to execute the MCCH sending method provided in any of the above embodiments, and has corresponding functions and beneficial effects.

[0566] Fig. 9 This is a schematic diagram of the structure of an MCCH receiving device provided in one embodiment of the present application. Fig. 9 As shown, the MCCH receiving device provided in this embodiment includes:

[0567] The receiving module 910 is used to receive indication information, where the indication information is used to indicate whether the MCCH information is changed.

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

[0569] In one embodiment, the indication information is included in the MCCH change notification;

[0570] or contained in DCI, system message, MCCH, NAS message, AS message, RRC layer signaling, SDAP layer signaling, PDCP layer signaling, RLC layer signaling, MAC layer signaling or PHY layer signaling;

[0571] Or included in other messages.

[0572] In one embodiment, the indication information is at least 1 bit.

[0573] In one embodiment, when the indication information is set to the first value, it indicates that the service area corresponding to the MBS service has changed;

[0574] When the indication information is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0575] In one embodiment, the MCCH change notification is used to indicate whether the MCCH information is changed;

[0576] The change of the MCCH information includes at least one of the following: a new MBS service starts, a change not caused by the start of a new MBS service, and a change in the service area corresponding to the MBS service.

[0577] 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;

[0578] The first indication information is used to indicate whether a new MBS service starts;

[0579] The second indication information is used to indicate whether a change not caused by the start of a new MBS service occurs;

[0580] The third indication information is used to indicate whether the service area corresponding to the MBS service has changed;

[0581] The fourth indication information is used to indicate whether a change that is not caused by the start of a new MBS service occurs, and / or to indicate whether a service area corresponding to the MBS service changes.

[0582] In one embodiment, when the first indication information is set to the third value, it indicates that a new MBS service has started.

[0583] When the first indication information is set to a fourth value, it indicates that no new MBS service is started;

[0584] and / or

[0585] When the second indication information is set to the fifth value, it indicates that a change not caused by the start of a new MBS service occurs.

[0586] When the second indication information is set to a sixth value, it indicates that no change that is not caused by the start of a new MBS service occurs;

[0587] and / or

[0588] When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed.

[0589] When the third indication information is set to an eighth value, it indicates that the service area corresponding to the MBS service has not changed;

[0590] and / or

[0591] When the fourth indication information is set to a ninth value, it indicates that a change not caused by the start of a new MBS service occurs, and / or indicates that a service area corresponding to the MBS service changes.

[0592] When the fourth indication information is set to the tenth value, it indicates that no change that is not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

[0593] In one embodiment, the receiving module 910 is further configured to receive the MCCH change notification;

[0594] If the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

[0595] In an example, the receiving module 910 is further configured to receive the MCCH change notification;

[0596] If at least one of the first indication information and / or the second indication information and / or the third indication information and / or the fourth indication information included in the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

[0597] In one embodiment, the terminal is not in the service area corresponding to the MBS service, or the terminal is in the service area corresponding to the MBS service;

[0598] The receiving module 910 is used to receive the MCCH change notification;

[0599] If the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

[0600] In one embodiment, the terminal is a terminal using a 3GPP R19 version protocol, or the terminal is a terminal using a version protocol before 3GPP R19;

[0601] The receiving module 910 is used to receive the MCCH change notification;

[0602] If the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

[0603] In one embodiment, the MBS service includes: a multicast service and / or a broadcast service that can be received by a terminal in an RRC connected state and / or an RRC inactive state and / or an RRC idle state.

[0604] Fig.10 This is a schematic diagram of the structure of an MCCH receiving device provided in another embodiment of the present application. Fig.10 As shown, the MCCH receiving device provided in this embodiment includes:

[0605] The receiving module 1010 is used to receive an MCCH change notification, where the MCCH change notification is used to indicate whether MCCH information is changed.

[0606] In one embodiment, whether the MCCH information changes includes whether the service area corresponding to the MBS service changes.

[0607] In one embodiment, in the MCCH change notification, at least one bit is used to indicate whether the service area corresponding to the MBS service is changed.

[0608] In one embodiment, when the at least one bit is set to the first value, it indicates that the service area corresponding to the MBS service changes;

[0609] When the at least one bit is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

[0610] In one embodiment, the MCCH change notification is used to indicate whether the MCCH information is changed;

[0611] The change of the MCCH information includes: a new MBS service starts, a change not caused by the start of a new MBS service, and a change in the service area corresponding to the MBS service.

[0612] 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;

[0613] The first indication information is used to indicate whether a new MBS service starts;

[0614] The second indication information is used to indicate whether a change not caused by the start of a new MBS service occurs;

[0615] The third indication information is used to indicate whether the service area corresponding to the MBS service has changed;

[0616] The fourth indication information is used to indicate whether a change that is not caused by the start of a new MBS service occurs, and / or to indicate whether a service area corresponding to the MBS service changes.

[0617] In one embodiment, when the first indication information is set to a third value, it indicates that a new MBS service has started;

[0618] When the first indication information is set to a fourth value, it indicates that no new MBS service is started;

[0619] and / or

[0620] When the second indication information is set to a fifth value, it indicates that a change not caused by the start of a new MBS service occurs;

[0621] When the second indication information is set to a sixth value, it indicates that no change that is not caused by the start of a new MBS service occurs;

[0622] and / or

[0623] When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed;

[0624] When the third indication information is set to an eighth value, it indicates that the service area corresponding to the MBS service has not changed;

[0625] and / or

[0626] When the fourth indication information is set to a ninth value, it indicates that a change not caused by the start of a new MBS service has occurred, and / or indicates that a service area corresponding to the MBS service has changed;

[0627] When the fourth indication information is set to the tenth value, it indicates that no change that is not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

[0628] In one embodiment, the receiving module 1010 is further configured to receive the MCCH change notification;

[0629] If the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

[0630] In one embodiment, the receiving module 1010 is further configured to receive the MCCH change notification;

[0631] If at least one of the first indication information and / or the second indication information and / or the third indication information and / or the fourth indication information included in the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

[0632] In one embodiment, the terminal is not in the service area corresponding to the MBS service, or the terminal is in the service area corresponding to the MBS service.

[0633] The receiving module 1010 receives the MCCH change notification;

[0634] If the MCCH change notification indication changes, the MCCH information is received.

[0635] In one embodiment, the terminal is a terminal using a 3GPP R19 version protocol, or the terminal is a terminal using a version of the protocol before 3GPP R19.

[0636] The receiving module 1010 receives the MCCH change notification;

[0637] If the MCCH change notification indication changes, the MCCH information is received.

[0638] In one embodiment, the MBS service includes:

[0639] A multicast service and / or a broadcast service that can be received by a terminal in an RRC connected state and / or an RRC inactive state and / or an RRC idle state.

[0640] The MCCH receiving device provided in the embodiments of the present application can be used to execute the MCCH receiving method provided in any of the above embodiments, and has corresponding functions and beneficial effects.

[0641] The following provides specific embodiments to specifically describe the implementation process of the present invention.

[0642] Embodiment 1

[0643] Base Station:

[0644] MCCH change notification is used to indicate changes in service areas.

[0645] Specifically, 1 bit can be added to the MCCH change notification indication.

[0646] -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 area of ​​all services indicated in the MCCH has not changed; or,

[0647] -When the value is set to 0, it indicates that the service areas of one or more services indicated in the MCCH have changed; when the value is set to 1, it indicates that the service areas of all services indicated in the MCCH have not changed.

[0648] Optionally, when the network changes (part of) the MCCH information, the network will send the MCCH change notification starting from the start position of the MCCH modification period to inform the UEs of the change.

[0649] Optionally, the MCCH change notification is carried by PDCCH, and the PDCCH is the PDCCH that schedules the MCCH in each repetition period in this modification period.

[0650] Optionally, the change of MCCH information only occurs in a specific radio frame, using the concept of a change period. In a change period, the same MCCH information can be transmitted multiple times, based on a repetition period.

[0651] Optionally, when an MCCH change notification is received, a UE that is receiving or interested in receiving an MBS broadcast service acquires new MCCH information starting from this time slot. The UE uses the previously acquired MCCH information until the UE acquires new MCCH information. The MCCH change notification is transmitted via a 2-bit bitmap. The MSB bit in the 2-bit bitmap, when set to 1, indicates that a new MBS service has started. The LSB bit in the 2-bit bitmap, when set to 1, indicates a modification of the MCCH information other than a change caused by the start of a new MBS service, for example, a change in the configuration of an ongoing MBSsession(s), the termination of an MBS session(s), or a change in neighboring cell information.

[0652] For example, the MCCH change notification 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), the stop 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 that the service area of ​​the MBS service has changed.

[0653] For example, the MCCH change notification is transmitted via a 2-bit bitmap. The first indication information (e.g., the MSB bit) in the 2-bit bitmap, when set to 1, indicates that a new MBS service has started. The fourth indication information (e.g., the LSB bit) in the 2-bit bitmap, when set to 1, indicates that the MCCH information is modified but not caused by the start of a new MBS service, and / or indicates that the service area of ​​the MBS service has changed.

[0654] For example, the MCCH change notification 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 that a new MBS service has started. 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 other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), a stop 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, and / or indicates that a service area of ​​the MBS service has changed.

[0655] For example, the MCCH change notification is transmitted via a 2-bit bitmap. The first indication information (e.g., the MSB bit) in the 2-bit bitmap, when set to 1, indicates that a new MBS service has started. The second indication information (e.g., the LSB bit) in the 2-bit bitmap, when set to 1, indicates a modification of the MCCH information other than a change caused by the start of a new MBS service, such as a change in the configuration of an ongoing MBS session(s), a stop of an MBS session(s), or a change in neighboring cell information. The change in the configuration of an MBS session(s) includes indicating that a service area of ​​the MBS service has changed.

[0656] UE:

[0657] For Rel-19 UE, if the UE is not currently in the service area of ​​any broadcast service of interest, then:

[0658] Receive this instruction

[0659] - If the service area of ​​one or more services indicated in the MCCH has changed, the corresponding MCCH is received.

[0660] - If the service areas of all services indicated in the MCCH have not changed and the MSB indication remains unchanged, the corresponding MCCH will not be received.

[0661] - If at least one of the indication information and the MSB indicates that the MCCH has changed, the corresponding MCCH is received; if both indications have not changed, the corresponding MCCH is not received.

[0662] For Rel-19 UE, if the UE is currently in the service area of ​​one or more broadcast services of interest, then:

[0663] -First case:

[0664] The MCCH change notification includes first indication information, second information and third indication information.

[0665] The UE receives the MCCH change notification, receives the first indication information, the second information, and the third indication information.

[0666] If one of the first indication information, the second information and the third indication information indicates that the MCCH has been changed, the MCCH is received; if none of the first indication information, the second information and the third indication information indicates that the MCCH has been changed, the MCCH is not received.

[0667] -Second case:

[0668] The MCCH change notification includes first indication information and fourth indication information.

[0669] The UE receives the MCCH change notification, and receives the first indication information and the fourth indication information.

[0670] If one of the first indication information and the fourth information indicates that the MCCH has been changed, the MCCH is received; if neither the first indication information nor the fourth information indicates that the MCCH has been changed, the MCCH is not received.

[0671] -Third case:

[0672] The MCCH change notification includes the first indication information, the fourth indication information and the third indication information.

[0673] The UE receives the MCCH change notification, receives the first indication information and the fourth indication information, and / or the third indication information.

[0674] If one of the first indication information, the fourth information and the third indication indicates that the MCCH has been changed, the MCCH is received; if neither the first indication information nor the fourth information indicates that the MCCH has been changed, the MCCH is not received.

[0675] If one of the first indication information and the fourth information indicates that the MCCH is changed, the MCCH is received; if neither the first indication information nor the fourth information indicates that the MCCH is changed, the MCCH is not received.

[0676] For Pre Rel-19 UE, this newly added indication information will be ignored, then:

[0677] -First case:

[0678] The MCCH change notification includes first indication information, second information and third indication information.

[0679] The UE receives the MCCH change notification, receives the first indication information and the second information (ignores the third information)

[0680] If one of the first indication information and the second information indicates that the MCCH has been changed, the MCCH is received; if neither the first indication information nor the second information indicates that the MCCH has been changed, the MCCH is not received.

[0681] -Second case:

[0682] The MCCH change notification includes first indication information and fourth indication information.

[0683] The UE receives the MCCH change notification, and receives the first indication information and the fourth indication information.

[0684] If one of the first indication information and the fourth information indicates that the MCCH has been changed, the MCCH is received; if neither the first indication information nor the fourth information indicates that the MCCH has been changed, the MCCH is not received.

[0685] -Third case:

[0686] The MCCH change notification includes the first indication information, the fourth indication information and the third indication information.

[0687] The UE receives the MCCH change notification, receives the first indication information and the fourth indication information (ignores the third indication information).

[0688] If one of the first indication information and the fourth information indicates that the MCCH has been changed, the MCCH is received; if neither the first indication information nor the fourth information indicates that the MCCH has been changed, the MCCH is not received.

[0689] In the above situation, when receiving MCCH, if there is service area information, it will be ignored.

[0690] The MCCH is the MCCH scheduled by the PDCCH that carries the indication information.

[0691] Embodiment 2:

[0692] Base Station:

[0693] Modification cycles are sent for service area changes for broadcast services.

[0694] The service area of ​​the broadcast service will not change during the same modification cycle.

[0695] Optionally, the modification period may be greater than, less than, or equal to an existing MCCH modification period.

[0696] Optionally, the modification period may be N times the existing MCCH modification period, and N may be an integer greater than or equal to 1.

[0697] The definition of the LSB bit has changed, that is, when set to 1 or 0, it indicates a modification of the MCCH information other than a change caused by the start of a new MBS service, for example, a change in the configuration of an ongoing MBS session(s), the termination of an MBS session(s) or a change in neighboring cell information, or a change in the service area.

[0698] 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 other than a change caused by the start of a new MBS service, for example, a change in the configuration of an ongoing MBS session(s), the termination of an MBS session(s) or a change in neighboring cell information, where the change in the configuration of an MBS session(s) may include a change in the service area.

[0699] UE:

[0700] For Rel-19 UE, if it is not currently in the service area of ​​any broadcast service of interest, then:

[0701] In the modification cycle described above, the LSB bit is received.

[0702] -If the LSB bit indicates a change, the corresponding MCCH is received;

[0703] -If the LSB bit does not indicate a change, the corresponding MCCH is not received.

[0704] Optionally, it is sufficient to receive the LSB bit once in the modification period.

[0705] Receiving the MSB bit during the MCCH modification period,

[0706] -If the MSB bit indicates a change, the corresponding MCCH is received;

[0707] -If the MSB bit does not indicate a change, the corresponding MCCH is not received.

[0708] Optionally, it is sufficient to receive the MSB bit once in the MCCH modification period.

[0709] A Rel-19 UE, if currently in the service area of ​​one or more broadcast services of interest, or a PreRel-19 UE, then:

[0710] Receive the LSB bit during the MCCH modification period,

[0711] -If the LSB bit indicates a change, the corresponding MCCH is received;

[0712] -If the LSB bit does not indicate a change, the corresponding MCCH is not received.

[0713] Optionally, it is sufficient to receive the LSB bit once in the MCCH modification period.

[0714] The present 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 implements the above-mentioned indication information sending method.

[0715] The present 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 implements the above-mentioned indication information receiving method.

[0716] The present application also provides a computer-readable storage medium, comprising a computer program, and when the computer program is executed by a processor, the processor implements any one of the methods.

[0717] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that can be accessed by the computer or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a solid state disk (solid state disk, SSD)), etc.

[0718] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example 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 performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0719] The above are only preferred embodiments of the present application, and are not intended to limit the embodiments and protection scope of the present application. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present application should be included in the protection scope of the present application.

Claims

1. A MCCH sending method, characterized in that: include: Generate indication information, where the indication information is used to indicate whether MCCH information changes; The instruction information is sent.

2. The method according to claim 1, characterized in that Whether the MCCH information has changed includes whether the service area corresponding to the MBS service has changed, and the method includes: generating indication information, where the indication information is used to indicate whether a service area corresponding to the MBS service changes; The instruction information is sent.

3. The method according to claim 1, characterized in that The indication information is included in the MCCH change notification; or contained in DCI, system message, MCCH, NAS message, AS message, RRC layer signaling, SDAP layer signaling, PDCP layer signaling, RLC layer signaling, MAC layer signaling or PHY layer signaling; Or included in other messages.

4. The method according to claim 1, characterized in that: The indication information is at least 1 bit.

5. The method according to claim 2, 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.

6. The method according to claim 1 or 3, characterized in that: MCCH change notification is used to indicate whether the MCCH information has changed; The change of the MCCH information includes at least one of the following: a new MBS service starts, a change not caused by the start of a new MBS service, and a change in the service area corresponding to the MBS service.

7. The method according to claim 1 or 3, characterized in that: The MCCH change notification includes first indication information, and / or second indication information, and / or third indication information, and / or fourth indication information; The first indication information is used to indicate whether a new MBS service starts; The second indication information is used to indicate whether a change not caused by the start of a new MBS service occurs; 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 that is not caused by the start of a new MBS service occurs, and / or to indicate whether a service area corresponding to the MBS service changes.

8. The method according to claim 7, characterized in that When the first indication information is set to the third value, it indicates that a new MBS service has started. When the first indication information is set to a fourth value, it indicates that no new MBS service is started; and / or When the second indication information is set to the fifth value, it indicates that a change not caused by the start of a new MBS service occurs. When the second indication information is set to a sixth value, it indicates that no change that is not caused by the start of a new MBS service occurs; and / or When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed. When the third indication information is set to an eighth 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 a ninth value, it indicates that a change not caused by the start of a new MBS service occurs, and / or indicates that a service area corresponding to the MBS service changes. When the fourth indication information is set to the tenth value, it indicates that no change that is not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

9. The method according to claim 1, 2 or 3, characterized in that: The process of sending MCCH change notification includes: Sending the MCCH change notification starting from the start position of the MCCH modification period; and / or In one MCCH modification period, the same MCCH information is transmitted multiple times; and / or The MCCH change notification is carried by the physical downlink control channel PDCCH.

10. The method according to claim 1, characterized in that The MBS services include: A multicast service and / or a broadcast service that can be received by a terminal in an RRC connected state and / or an RRC inactive state and / or an RRC idle state.

11. A MCCH sending method, characterized in that: include: Generate an MCCH change notification, where the MCCH change notification is used to indicate whether MCCH information has changed; Send the MCCH change notification.

12. The method according to claim 11, characterized in that The change in MCCH information includes a change in a service area corresponding to an MBS service, and the method includes: Generate an MCCH change notification, where the MCCH change notification is used to indicate whether a service area corresponding to the MBS service has changed; Send the MCCH change notification.

13. The method according to claim 11, characterized in that In the MCCH change notification, at least one bit is used to indicate whether the MCCH information is changed.

14. The method according to claim 12, characterized in that When the at least one bit is set to the first value, it indicates that the service area corresponding to the MBS service changes; When the at least one bit is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

15. The method according to claim 11, characterized in that The change of the MCCH information includes: a new MBS service starts, a change not caused by the start of a new MBS service, and a change in the service area corresponding to the MBS service.

16. The method according to claim 11, characterized in that The MCCH change notification includes first indication information, and / or second indication information, and / or third indication information, and / or fourth indication information; The first indication information is used to indicate whether a new MBS service starts; The second indication information is used to indicate whether a change not caused by the start of a new MBS service occurs; 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 that is not caused by the start of a new MBS service occurs, and / or to indicate whether a service area corresponding to the MBS service changes.

17. The method according to claim 16, characterized in that When the first indication information is set to the third value, it indicates that a new MBS service has started. When the first indication information is set to a fourth value, it indicates that no new MBS service is started; and / or When the second indication information is set to the fifth value, it indicates that a change not caused by the start of a new MBS service occurs. When the second indication information is set to a sixth value, it indicates that no change that is not caused by the start of a new MBS service occurs; and / or When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed. When the third indication information is set to an eighth 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 a ninth value, it indicates that a change not caused by the start of a new MBS service occurs, and / or indicates that a service area corresponding to the MBS service changes; When the fourth indication information is set to the tenth value, it indicates that no change that is not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

18. The method according to claim 11, characterized in that The process of sending the MCCH change notification includes: Sending the MCCH change notification starting from the start position of the MCCH modification period; and / or In one MCCH modification period, the same MCCH information is transmitted multiple times; and / or The MCCH change notification is carried by the physical downlink control channel PDCCH.

19. The method according to claim 11, characterized in that The MBS services include: A multicast service and / or a broadcast service that can be received by a terminal in an RRC connected state and / or an RRC inactive state and / or an RRC idle state.

20. A MCCH receiving method, characterized in that: include: The terminal receives indication information, where the indication information is used to indicate whether the MCCH information is changed.

21. The method according to claim 20, characterized in that Whether the MCCH information has changed includes whether the service area corresponding to the MBS service has changed, and the method includes: Indication information is received, where the indication information is used to indicate whether a service area corresponding to the MBS service changes.

22. The method according to claim 20, characterized in that The indication information is included in the MCCH change notification; or contained in DCI, system message, MCCH, NAS message, AS message, RRC layer signaling, SDAP layer signaling, PDCP layer signaling, RLC layer signaling, MAC layer signaling or PHY layer signaling; Or included in other messages.

23. The method according to claim 20, characterized in that The indication information is at least 1 bit.

24. The method according to claim 21, 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.

25. The method according to claim 20 or 22, characterized in that MCCH change notification is used to indicate whether the MCCH information has changed; The change of the MCCH information includes at least one of the following: a new MBS service starts, a change not caused by the start of a new MBS service, and a change in the service area corresponding to the MBS service.

26. The method according to claim 20 or 22, characterized in that The MCCH change notification includes first indication information, and / or second indication information, and / or third indication information, and / or fourth indication information; The first indication information is used to indicate whether a new MBS service starts; The second indication information is used to indicate whether a change not caused by the start of a new MBS service occurs; 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 that is not caused by the start of a new MBS service occurs, and / or to indicate whether a service area corresponding to the MBS service changes.

27. The method according to claim 26, characterized in that When the first indication information is set to the third value, it indicates that a new MBS service has started. When the first indication information is set to a fourth value, it indicates that no new MBS service is started; and / or When the second indication information is set to the fifth value, it indicates that a change not caused by the start of a new MBS service occurs. When the second indication information is set to a sixth value, it indicates that no change that is not caused by the start of a new MBS service occurs; and / or When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed. When the third indication information is set to an eighth 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 a ninth value, it indicates that a change not caused by the start of a new MBS service occurs, and / or indicates that a service area corresponding to the MBS service changes. When the fourth indication information is set to the tenth value, it indicates that no change that is not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

28. The method according to claim 20 or 22, characterized in that Also includes: When the terminal receives the MCCH change notification; Receive the MCCH information.

29. The method according to claim 20, characterized in that Also includes: The terminal receives the MCCH change notification; If at least one of the first indication information and / or the second indication information and / or the third indication information and / or the fourth indication information included in the MCCH change notification indicates that the MCCH information has changed, the MCCH information is received.

30. The method according to claim 20, characterized in that The terminal is not in the service area corresponding to the MBS service, or the terminal is in 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.

31. The method according to claim 20, characterized in that The terminal is a terminal using a 3GPP R19 version of the protocol, or the terminal is a terminal using a version of the protocol before 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.

32. The method according to claim 20, characterized in that The MBS services include: A multicast service and / or a broadcast service that can be received by a terminal in an RRC connected state and / or an RRC inactive state and / or an RRC idle state.

33. A MCCH sending method, characterized in that: include: The terminal receives an MCCH change notification, where the MCCH change notification is used to indicate whether MCCH information is changed.

34. A MCCH receiving method, characterized in that: include: The terminal receives an MCCH change notification, where the MCCH change notification is used to indicate whether MCCH information is changed.

35. The method according to claim 35, characterized in that The change in MCCH information includes a change in a service area corresponding to an MBS service, and the method includes: The terminal receives an MCCH change notification, where the MCCH change notification is used to indicate whether a service area corresponding to an MBS service changes.

36. The method according to claim 34, characterized in that In the MCCH change notification, at least one bit is used to indicate whether the MCCH information is changed.

37. The method according to claim 35, characterized in that When the at least one bit is set to the first value, it indicates that the service area corresponding to the MBS service changes; When the at least one bit is set to the second value, it indicates that the service area corresponding to the MBS service has not changed.

38. The method according to claim 34, characterized in that The change of the MCCH information includes: a new MBS service starts, a change not caused by the start of a new MBS service, and a change in the service area corresponding to the MBS service.

39. The method according to claim 34, characterized in that The MCCH change notification includes first indication information, and / or second indication information, and / or third indication information, and / or fourth indication information; The first indication information is used to indicate whether a new MBS service starts; The second indication information is used to indicate whether a change not caused by the start of a new MBS service occurs; 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 that is not caused by the start of a new MBS service occurs, and / or to indicate whether a service area corresponding to the MBS service changes.

40. The method according to claim 39, characterized in that When the first indication information is set to a third value, it indicates that a new MBS service has started; When the first indication information is set to a fourth value, it indicates that no new MBS service is started; and / or When the second indication information is set to a fifth value, it indicates that a change not caused by the start of a new MBS service occurs; When the second indication information is set to a sixth value, it indicates that no change that is not caused by the start of a new MBS service occurs; and / or When the third indication information is set to the seventh value, it indicates that the service area corresponding to the MBS service has changed; When the third indication information is set to an eighth 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 a ninth value, it indicates that a change not caused by the start of a new MBS service has occurred, and / or indicates that a service area corresponding to the MBS service has changed; When the fourth indication information is set to the tenth value, it indicates that no change that is not caused by the start of a new MBS service occurs, and no service area corresponding to any MBS service changes.

41. The method according to claim 34, characterized in that Also includes: When the terminal receives the MCCH change notification; Receive the MCCH information.

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

43. The method according to claim 34, characterized in that The terminal is not in the service area corresponding to the MBS service, or the terminal is in the service area corresponding to the MBS service. The terminal receives the MCCH change notification; If the MCCH change notification indication changes, the MCCH information is received.

44. The method according to claim 34, characterized in that The terminal is a terminal using a 3GPP R19 version of the protocol, or the terminal is a terminal using a version of the protocol before 3GPP R19, The terminal receives the MCCH change notification; If the MCCH change notification indication changes, the MCCH information is received.

45. The method according to claim 34, characterized in that The MBS services include: A multicast service and / or a broadcast service that can be received by a terminal in an RRC connected state and / or an RRC inactive state and / or an RRC idle state.

46. ​​An MCCH sending device, characterized in that: include: A generating module, used to generate indication information, where the indication information is used to indicate whether the MCCH information is changed; A sending module sends the indication information.

47. An MCCH sending device, characterized in that: include: A generating module, used for generating an MCCH change notification, wherein the MCCH change notification is used for indicating whether the MCCH information is changed; A sending module is used to send the MCCH change notification.

48. An MCCH receiving device, characterized in that: include: The receiving module is used to receive indication information, where the indication information is used to indicate whether the MCCH information changes.

49. An MCCH receiving device, characterized in that: include: The receiving module is used to receive an MCCH change notification, where the MCCH change notification is used to indicate whether the MCCH information is changed.

50. A base station, comprising a processor and a memory, characterized in that: The memory is configured to store a computer program, and when the computer program is executed by the processor, the processor implements the MCCH sending method according to any one of claims 1 to 19.

51. A terminal comprising a processor and a memory, characterized in that: The memory is configured to store a computer program, and when the computer program is executed by the processor, the processor implements the MCCH receiving method according to any one of claims 20 to 45.

52. A computer-readable storage medium comprising a computer program, characterized in that: When the computer program is executed by a processor, the processor is caused to implement the method according to any one of claims 1 to 45.

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