Service switching, indication and device, storage medium, base station, terminal

Abstract

A service switching, indication and device, storage medium, base station, terminal, the service switching indication method includes: determining the type of the current service and the type of the service to be switched; if the type of the current service is a multicast service and the type of the service to be switched is a unicast service, then indicating to all user equipments whether to perform the switch through downlink control information, or carrying the identifier of the user equipment that needs to perform the switch in the downlink control information and sending it out. The technical solution of the present invention can realize the smooth conversion of the multicast service to the unicast transmission service.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a service switching, indication and device, storage medium, base station and terminal. Background Art

[0002] In the Long Term Evolution (LTE) system release 8 / 9, multicast service transmission is implemented through the Multicast Broadcast Single Frequency Network (MBSFN) transmission mechanism. Multiple cells need to synchronously schedule the same service on the same time-frequency domain resources. Because the time-frequency domain resources are reserved, they cannot be used for other data transmission even if there is not much data scheduling. Therefore, the MBSFN mechanism leads to serious waste of resources. In Release 14, the single cell-point to multipoint (SC-PTM) transmission mechanism is introduced for broadcast multicast services. User Equipment (UE) in a cell that is interested in broadcast multicast services can receive dynamically scheduled broadcast multicast services according to the configuration information. Different cells can flexibly and dynamically schedule broadcast multicast services without synchronization.

[0003] LTE introduces multiple channels. The Multicast Control Channel (MCCH) is used to carry the configuration information of broadcast and multicast services. The Multicast Traffic Channel (MTCH) is used to carry the scheduling data of broadcast and multicast services. MCCH and MTCH are mapped to the Physical Downlink Shared Channel (PDSCH). Multiple Radio Network Temporary Identities (RNTI) are introduced to scramble the scheduling of different data. The Single Cell Radio Network Temporary Identifier (SC-RNTI) is used to scramble the Physical Downlink Control Channel (PDCCH) and the scheduled MCCH data. The Group Radio Network Temporary Identifier (G-RNTI) is used to scramble the PDCCH and the scheduled MTCH data. Each broadcast and multicast service is associated with a G-RNTI, and the UE can selectively receive different broadcast and multicast services. The SC-PTM broadcast and multicast transmission mechanism shares the entire resource with the unicast service, and the base station dynamically schedules and supports the transmission of broadcast and multicast services and unicast services in the same time slot.

[0004] The fifth generation mobile communication technology (5th generation mobile networks or 5th generation wireless systems, 5G) system supports terminals with different bandwidth reception capabilities. In order to support terminals with different bandwidth capabilities, the 3rd Generation Partnership Project (3GPP) organization proposed the definition of partial carrier bandwidth (Band Width Part, BWP). Each BWP has the following Numerology characteristics: subcarrier spacing, cyclic prefix (Cyclic Prefix, CP) type, frequency domain position, and bandwidth length. At the same time, in order to save terminal power consumption, after the terminal completes the radio resource control (Radio Resource Control, RRC) connection with the network, the network will configure one or more BWPs for the terminal according to the terminal's bandwidth reception capability and service requirements. These BWPs must be limited to the maximum reception bandwidth range of the UE. The terminal / network can adaptively adjust the used BWP according to the terminal's service requirements and load conditions, and the BWP can be activated and deactivated through RRC signaling or scheduling downlink control information (Downlink Control Information, DCI). Currently, BWP conversion is indicated by scheduling DCI, and the DCI indicates the target BWP identifier to be converted. If the BWP ID is changed in the scheduling DCI, the UE needs to perform a BWP conversion, convert the RF center frequency to the indicated new BWP, and send and receive data on the new BWP according to the resource location indicated by the DCI.

[0005] Starting from release R17, new wireless (NR) broadcast and multicast services are supported. LTE can be regarded as having only one BWP, but in NR, the base station will configure different BWPs for the UE, including the same or different BWP numbers, the same or different BWP positions, the same or different BWP subcarrier spacing, the same or different BWP bandwidth lengths, and only one BWP is active at a time.

[0006] According to the project requirements, the new wireless system must support unicast services and point-to-multipoint multicast transmission of broadcast multicast services, and can dynamically switch between unicast and point-to-multipoint multicast transmission. If unicast transmission is adopted, the existing unicast service transmission mechanism can be used. The base station dynamically schedules data through the PDCCH scrambled by the UE-specific cell radio network temporary identifier (C-RNTI). The data is carried through the physical shared channel PDSCH. It can be sent to a single UE through C-RNTI scrambling, or it can be sent to a group of UEs through G-RNTI scrambling.

[0007] However, if the multicast transmission is switched to the unicast transmission, how to indicate it to the UE and what the UE's behavior is, this is a technical problem that needs to be solved urgently. Summary of the invention

[0008] The technical problem solved by the present invention is how to realize smooth conversion from multicast service to unicast transmission service.

[0009] To solve the above technical problems, an embodiment of the present invention provides a service switching indication method, which includes: determining the type of the current service and the type of the service to be switched; if the type of the current service is a multicast service and the type of the service to be switched is a unicast service, then indicating to all user devices whether to perform the switch through downlink control information, or carrying the identifier of the user device that needs to perform the switch in the downlink control information and sending it out.

[0010] Optionally, the instructing all user equipments whether to perform switching through downlink control information includes: carrying switching indication information at a newly added bit position of the downlink control information and sending it out, wherein the switching indication information indicates whether to perform switching.

[0011] Optionally, carrying the identifier of the user equipment that needs to be switched in the downlink control information includes: carrying the identifier of the user equipment that needs to be switched in a bitmap or MAC CE in the downlink control information and sending it.

[0012] Optionally, before carrying the identifier of the user equipment that needs to be switched in the downlink control information, the method further includes: sending the bit position in the bitmap or MAC CE corresponding to each user equipment to all user equipments through semi-static configuration or RRC signaling.

[0013] Optionally, before carrying the identifier of the user equipment that needs to be switched in the downlink control information, the method also includes: configuring a new LCID for all user equipments so that the user equipments can use the new LCID to identify the MAC CE carrying the identifier of the user equipment that needs to be switched.

[0014] To solve the above technical problems, an embodiment of the present invention further discloses a service switching method, which includes: receiving downlink control information from a base station, and when the type of the current service is a multicast service and the type of the service to be switched is a unicast service, the base station indicates to all user devices whether to perform the switch through the downlink control information, or carries the identifier of the user device that needs to perform the switch in the downlink control information and sends it out; determining whether to perform the switch from the multicast service to the unicast service based on the downlink control information.

[0015] Optionally, determining whether to execute switching from multicast service to unicast service according to the downlink control information includes: if the newly added bit position in the downlink control information carries switching indication information indicating execution of switching, determining to execute switching and monitoring the PDCCH encrypted by the unicast scheduling C-RNTI.

[0016] Optionally, determining whether to perform switching from multicast service to unicast service according to the downlink control information includes: determining the corresponding bit position in the bitmap or MAC CE of the downlink control information according to its own identifier; and determining whether to perform switching according to the value of the corresponding bit position.

[0017] Optionally, the service switching method further includes: if it is determined to perform switching, monitoring the PDCCH encrypted by the unicast scheduling C-RNTI; or, if it is determined to perform switching, switching to a preset part of the bandwidth to monitor the PDCCH encrypted by the unicast scheduling C-RNTI.

[0018] Optionally, before determining the corresponding bit position in the bitmap or MAC CE of the downlink control information according to its own identifier, the method also includes: identifying the MAC CE using a new LCID, where the new LCID is pre-configured by the base station.

[0019] An embodiment of the present invention also discloses a service switching indication device, which includes: a service type determination module, used to determine the type of the current service and the type of the service to be switched; a switching indication module, used to indicate to all user devices whether to perform switching through downlink control information if the type of the current service is a multicast service and the type of the service to be switched is a unicast service, or to carry the identifier of the user device that needs to perform switching in the downlink control information and send it out.

[0020] An embodiment of the present invention also discloses a service switching device, which includes: a receiving module, used to receive downlink control information from a base station, when the type of the current service is a multicast service and the type of the service to be switched is a unicast service, the base station indicates to all user devices whether to perform switching through the downlink control information, or carries the identifier of the user device that needs to perform switching in the downlink control information and sends it out; a switching determination module, used to determine whether to perform switching from a multicast service to a unicast service based on the downlink control information.

[0021] The embodiment of the present invention further discloses a storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program executes the steps of the service switching indication method or the steps of the service switching method.

[0022] An embodiment of the present invention further discloses a base station, including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor executes the steps of the service switching indication method when running the computer program.

[0023] The embodiment of the present invention further discloses a terminal, including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor executes the steps of the service switching method when running the computer program.

[0024] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0025] In the technical solution of the present invention, when the base station needs to switch from a multicast service to a unicast service, the downlink control information is used to indicate to all user devices whether to perform the switch, so that the user equipment can start monitoring the unicast service after receiving the instruction, avoiding continuous monitoring and achieving the purpose of power saving; alternatively, the base station can also carry the identifier of the user equipment that needs to perform the switch in the downlink control information, so that only some of the user equipment that needs to switch monitors the unicast service, thereby avoiding all user equipment from monitoring the unicast service and reducing unnecessary power consumption of the user equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a flow chart of a service switching indication method according to an embodiment of the present invention;

[0027] Figure 2 is a flow chart of a service switching method according to an embodiment of the present invention;

[0028] Figure 3 is a structural diagram of a service switching indication device according to an embodiment of the present invention;

[0029] Figure 4 It is a structural diagram of a service switching device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] As described in the background art, if multicast transmission is switched to unicast transmission, how to indicate it to the UE and what the behavior of the UE is, this is a technical problem that needs to be solved urgently.

[0031] In the technical solution of the present invention, when the base station needs to switch from a multicast service to a unicast service, the downlink control information is used to indicate to all user devices whether to perform the switch, so that the user equipment can start monitoring the unicast service after receiving the instruction, avoiding continuous monitoring and achieving the purpose of power saving; alternatively, the base station can also carry the identifier of the user equipment that needs to perform the switch in the downlink control information, so that only some of the user equipment that needs to switch monitors the unicast service, thereby avoiding all user equipment from monitoring the unicast service and reducing unnecessary power consumption of the user equipment.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] Figure 1 The present invention is a flowchart of a service switching indication method according to an embodiment of the present invention.

[0034] The service switching indication method of this embodiment can be used on the base station side.

[0035] It is understandable that in 5G systems or other new technology systems, unicast services are point-to-point transmissions; multicast services refer to point-to-multipoint transmissions.

[0036] Specifically, Figure 1 The service switching indication method may include the following steps:

[0037] Step S101: Determine the type of the current service and the type of the service to be switched;

[0038] Step S102: If the current service type is a multicast service and the service type to be switched is a unicast service, then instruct all user equipments via downlink control information whether to perform switching, or carry the identifier of the user equipment to be switched in the downlink control information and send it out.

[0039] It should be noted that the serial numbers of the steps in this embodiment do not limit the execution order of the steps.

[0040] In this embodiment, when service switching is required, the base station can determine the type of the current service and the type of the service to be switched. Specifically, the scenarios where a multicast service needs to be switched to a unicast service may include the following scenarios: switching from a point-to-multipoint transmission mechanism to a point-to-point transmission; if a broadcast multicast service is transmitted on a specific broadcast multicast service (MBS) BWP, and a unicast service is transmitted on another BWP, and the currently activated BWP is an MBS BWP, and some UEs have unicast service scheduling with a higher priority than the MBS service, the base station needs to instruct the UE to perform a BWP conversion, that is, to instruct the UE to switch the service.

[0041] In a specific implementation, the base station can indicate to all user devices whether to perform switching through downlink control information. In the current multicast service, the base station can schedule data to multiple user devices in the group at the same time. When the number of user devices in the current multicast service is less than a preset threshold, the base station can choose to indicate to all user devices whether to perform switching through downlink control information.

[0042] Specifically, UEs in the cell that are interested in the same MBS service receive DCI. If the DCI indicates that a switch to point-to-point transmission is required, these UEs start to monitor the PDCCH scrambled by the unicast scheduling C-RNTI, otherwise they continue to monitor the PDCCH scrambled by the G-RNTI associated with the corresponding MBS service.

[0043] Alternatively, the base station may also carry the identifier of the user equipment that needs to be switched in the downlink control information and send it out. That is, the base station indicates in the DCI which UEs need to be scheduled for unicast data. Accordingly, after receiving the indication, the user equipment with the identifier starts to monitor the PDCCH encrypted by the C-RNTI for unicast data scheduling.

[0044] In an embodiment of the present invention, when the base station needs to switch from a multicast service to a unicast service, the base station indicates to all user devices whether to perform the switch through downlink control information, so that the user equipment starts to monitor the unicast service after receiving the instruction, avoiding continuous monitoring and achieving the purpose of power saving; alternatively, the base station may also carry the identifier of the user equipment that needs to perform the switch in the downlink control information, so that only some of the user equipment that needs to switch monitors the unicast service, thereby avoiding all user equipment from monitoring the unicast service and reducing unnecessary power consumption of the user equipment.

[0045] In a non-limiting embodiment, Figure 1 The step S102 shown may include the following steps: carrying switching indication information at a newly added bit position of the downlink control information and sending it out, wherein the switching indication information indicates whether to perform switching.

[0046] In a specific implementation, a new bit field may be introduced in the DCI to carry the switching indication information. Specifically, the new bit field may include a newly added bit, and the value of the newly added bit is different, indicating different contents. For example, if the newly added bit is set to 0, it indicates that the current transmission mechanism remains unchanged; if the newly added bit is set to 1, it indicates that the transmission mechanism has changed.

[0047] Accordingly, after receiving the DCI, the UE determines whether to perform switching by determining the value of the newly added bit in the new bit field.

[0048] In another non-limiting embodiment, Figure 1 The step S102 shown may include the following steps: sending the identifier of the user equipment that needs to be switched in a bitmap or MAC CE in the downlink control information.

[0049] Different from the aforementioned embodiment in which all UEs are instructed whether to switch, the embodiment of the present invention instructs some UEs whether to switch.

[0050] In a specific implementation, the base station first determines the identifier of the user equipment that needs to be switched, and carries the above identifier in the bitmap (bitmap) in the DCI or the control element (ControlElement, CE) of the media access control (Media Access Control, MAC) and sends it out. Since different UEs have different bit positions in the bitmap or MAC CE, the base station needs to set the value of the corresponding bit position to indicate to the corresponding UE whether to switch. For example, if the UE needs to switch the transmission mechanism, the corresponding bit position of the UE is set to 1; if the UE does not need to switch the transmission mechanism, the corresponding bit position of the UE is set to 0. The opposite is also possible, and the embodiment of the present invention does not limit this.

[0051] Accordingly, after receiving the DCI or MAC CE, the user equipment can compare its own identifier with the identifier carried by the bitmap in the DCI, or compare its own identifier with the identifier carried by the MAC CE. If the comparison is consistent, the UE executes a switch from multicast to unicast, that is, monitors the PDCCH encrypted by the unicast scheduling C-RNTI, otherwise the UE continues to monitor the PDCCH encrypted by the G-RNTI associated with the corresponding MBS service.

[0052] Among them, different UEs have different bit positions in the bitmap or MAC CE. For example, if the corresponding bit position of the UE is set to 1, it means that the transmission mechanism conversion is required; if the corresponding bit position of the UE is set to 0, it means that the transmission mechanism conversion is not required. The opposite is also possible, and the embodiment of the present invention does not limit this.

[0053] Furthermore, the bit position in the bitmap or MAC CE corresponding to each user equipment is sent to all user equipments through a semi-static configuration manner or RRC signaling.

[0054] In this embodiment, in order to enable the UE to know its bit position in the bitmap or MAC CE in advance, the base station may send the bit position corresponding to each UE to all user equipments in advance through semi-static configuration or RRC signaling.

[0055] Accordingly, the UE may determine whether it needs to perform switching according to its corresponding bit position in the bitmap or MAC CE in a subsequent step.

[0056] Furthermore, a new logical channel identifier (LCID) is configured for all user equipments, so that the user equipments can use the new LCID to identify the MAC CE carrying the identifier of the user equipment that needs to be switched.

[0057] In this embodiment, the new LCID may indicate the type of the control message, that is, the type is the switching information from the multicast service to the unicast service. Accordingly, the UE may use the new LCID to receive and identify the MAC CE.

[0058] Please refer to Figure 2 The embodiment of the present invention also discloses a service switching method for use on a user equipment side.

[0059] Specifically, the service switching method may include the following steps:

[0060] Step S201: receiving downlink control information from a base station;

[0061] Step S202: Determine whether to perform switching from a multicast service to a unicast service according to the downlink control information.

[0062] Wherein, when the type of the current service is a multicast service and the type of the service to be switched is a unicast service, the base station indicates to all user equipments whether to perform switching through downlink control information, or carries the identifier of the user equipment to be switched in the downlink control information and sends it out

[0063] In this embodiment, since the base station carries an indication of whether to perform switching in the DCI, the UE can determine whether to perform switching from the multicast service to the unicast service by receiving the DCI.

[0064] In a non-limiting embodiment, Figure 2The step S202 shown may include the following steps: if the newly added bit position in the downlink control information carries the switching indication information indicating to execute the switching, then determine to execute the switching, and monitor the PDCCH scrambled by the unicast scheduling C-RNTI.

[0065] In this embodiment, different bit values ​​at the newly added bit positions indicate different information. For example, if the newly added bit is set to 0, the UE determines that the current transmission mechanism remains unchanged; if the newly added bit is set to 1, the UE determines that the transmission mechanism changes, and the UE performs a switch from a multicast service to a unicast service.

[0066] In a non-limiting embodiment, Figure 2 The step S202 shown may include the following steps: determining the corresponding bit position in the bitmap or MAC CE of the downlink control information according to its own identifier; and determining whether to perform switching according to the value of the corresponding bit position.

[0067] In this embodiment, the UE may receive in advance the bitmap corresponding to each user equipment or the bit position in the MAC CE sent by the base station. Therefore, after receiving the DCI or MAC CE, the UE may first search for the bit position corresponding to its own identifier, and then determine whether to perform the switch from the multicast service to the unicast service according to the bit value at the bit position.

[0068] For example, if the corresponding bit position is set to 1, it indicates that the transmission mechanism conversion needs to be performed; if the corresponding bit position is set to 0, it indicates that the transmission mechanism conversion does not need to be performed.

[0069] Furthermore, the switching of UE from multicast service to unicast service referred to in the embodiment of the present invention means that: the UE monitors the PDCCH scrambled by the unicast scheduling C-RNTI, or the UE switches to a preset part of the bandwidth to monitor the PDCCH scrambled by the unicast scheduling C-RNTI.

[0070] Specifically, the preset partial bandwidth may be a BWP pre-specified by the base station, or may be a BWP pre-agreed by a communication protocol.

[0071] Furthermore, the UE may identify the MAC CE using a new LCID, where the new LCID is pre-configured by the base station.

[0072] Please refer to Figure 3 The embodiment of the present invention further discloses a service switching indication device, which is used at the base station side. The service switching indication device 30 may include:

[0073] A service type determination module 301 is used to determine the type of the current service and the type of the service to be switched;

[0074] The switching indication module 302 is used to indicate whether to perform switching to all user devices through downlink control information if the type of the current service is a multicast service and the type of the service to be switched is a unicast service, or to carry the identifier of the user equipment that needs to be switched in the downlink control information and send it out.

[0075] In an embodiment of the present invention, when the base station needs to switch from a multicast service to a unicast service, the base station indicates to all user devices whether to perform the switch through downlink control information, so that the user equipment starts to monitor the unicast service after receiving the instruction, avoiding continuous monitoring and achieving the purpose of power saving; alternatively, the base station may also carry the identifier of the user equipment that needs to perform the switch in the downlink control information, so that only some of the user equipment that needs to switch monitors the unicast service, thereby avoiding all user equipment from monitoring the unicast service and reducing unnecessary power consumption of the user equipment.

[0076] For more information about the working principle and working method of the service switching indication device 30, please refer to Figure 1 to Figure 2 The relevant description in will not be repeated here.

[0077] Please refer to Figure 4 The embodiment of the present invention further discloses a service switching indication device, which is used at the user equipment side. The service switching indication device 40 may include:

[0078] The receiving module 401 is configured to receive downlink control information from a base station. When the type of the current service is a multicast service and the type of the service to be switched is a unicast service, the base station indicates to all user equipments whether to perform switching through the downlink control information, or carries an identifier of the user equipment to be switched in the downlink control information and sends it out;

[0079] The switching determination module 402 is used to determine whether to perform switching from the multicast service to the unicast service according to the downlink control information.

[0080] For more information about the working principle and working method of the service switching indication device 40, please refer to Figure 1 to Figure 2 The relevant description in will not be repeated here.

[0081] The embodiment of the present invention further discloses a storage medium, which is a computer-readable storage medium and stores a computer program. When the computer program is run, it can execute Figure 3 The steps of the access control method shown in . The storage medium may include ROM, RAM, magnetic disk or optical disk, etc. The storage medium may also include non-volatile memory (non-volatile) or non-transitory memory, etc.

[0082] The embodiment of the present invention further discloses a user equipment, which may include a memory and a processor, wherein the memory stores a computer program that can be run on the processor. When the processor runs the computer program, it can execute Figure 2 The steps of the access control method shown in . The user equipment includes but is not limited to terminal equipment such as mobile phones, computers, and tablet computers.

[0083] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A service switching indication method, characterized in that: include: Determine the type of current service and the type of service to be switched; If the type of the current service is a multicast service and the type of the service to be switched is a unicast service, the identifier of the user equipment that needs to be switched is carried in the downlink control information or the media access control element MAC CE and sent out, and the downlink control information is also used to indicate the partial bandwidth BWP conversion, so that the user equipment monitors the physical downlink control channel PDCCH scrambled by the unicast scheduling cell radio network temporary identifier C-RNTI in the preset partial bandwidth; Wherein, before the identifier of the user equipment that needs to be switched is carried in the MAC CE, the method further includes: A new logical channel identifier LCID is configured for all user equipments, so that the user equipments can use the new LCID to identify the MAC CE carrying the identifier of the user equipment that needs to be switched.

2. The service switching indication method according to claim 1, characterized in that: The carrying of the identifier of the user equipment requiring handover in the downlink control information includes: The identifier of the user equipment that needs to be switched is carried in a bitmap or MACCE in the downlink control information and sent out.

3. The service switching indication method according to claim 2, characterized in that: Before the identifier of the user equipment that needs to be switched is carried in the downlink control information, the method further includes: The bit position in the bitmap or MAC CE corresponding to each user equipment is sent to all user equipments through semi-static configuration or RRC signaling.

4. A service switching method, characterized in that: include: receiving downlink control information or a media access control element MAC CE from a base station, wherein when the type of the current service is a multicast service and the type of the service to be switched is a unicast service, the base station carries an identifier of a user equipment that needs to be switched in the downlink control information or the MAC CE and sends it out; Determining whether to perform switching from a multicast service to a unicast service according to the downlink control information, wherein the downlink control information is also used to indicate a partial bandwidth BWP conversion; Monitoring the physical downlink control channel PDCCH scrambled by the unicast scheduling cell radio network temporary identifier C-RNTI in the preset part of the bandwidth; Wherein, the determining whether to perform switching from a multicast service to a unicast service according to the MAC CE includes: The MAC CE is identified by using a new LCID, where the new LCID is pre-configured by the base station.

5. The service switching method according to claim 4, characterized in that: The determining whether to perform switching from a multicast service to a unicast service according to the downlink control information or the MAC CE includes: Determine the corresponding bit position in the bitmap or MAC CE of the downlink control information according to its own identifier; Whether to perform switching is determined according to the value of the corresponding bit position.

6. The service switching method according to claim 5, characterized in that: Also includes: If it is determined to perform the handover, the PDCCH scrambled by the unicast scheduling C-RNTI is monitored; Alternatively, if it is determined to perform switching, the preset bandwidth is switched to monitor the PDCCH scrambled by the unicast scheduling C-RNTI.

7. A service switching indication device, characterized in that: include: A service type determination module, used to determine the type of the current service and the type of the service to be switched; A switching indication module, used for carrying the identifier of the user equipment that needs to be switched in the downlink control information or MAC CE and sending it out if the type of the current service is a multicast service and the type of the service to be switched is a unicast service, wherein the downlink control information is also used to indicate the partial bandwidth BWP conversion, so that the user equipment can monitor the physical downlink control channel PDCCH scrambled by the unicast scheduling cell radio network temporary identifier C-RNTI in the preset partial bandwidth; Wherein, before the identifier of the user equipment that needs to be switched is carried in the MAC CE, the method further includes: A new logical channel identifier LCID is configured for all user equipments, so that the user equipments can use the new LCID to identify the MAC CE carrying the identifier of the user equipment that needs to be switched.

8. A service switching device, characterized in that: include: A receiving module, configured to receive downlink control information or a media access control element MAC CE from a base station, wherein when the type of the current service is a multicast service and the type of the service to be switched is a unicast service, the base station carries an identifier of a user equipment that needs to be switched in the downlink control information or the MAC CE and sends it out; A switching determination module, used to determine whether to perform switching from a multicast service to a unicast service according to the downlink control information, wherein the downlink control information is also used to indicate a partial bandwidth BWP conversion; Monitoring the physical downlink control channel PDCCH scrambled by the unicast scheduling cell radio network temporary identifier C-RNTI in the preset part of the bandwidth; The switching determination module is further configured to perform the following steps: The MAC CE is identified by using a new LCID, where the new LCID is pre-configured by the base station.

9. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the service switching indication method described in any one of claims 1 to 3 are executed, or the steps of the service switching method described in any one of claims 4 to 6 are executed.

10. A base station, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor runs the computer program, the processor executes the steps of the service switching indication method according to any one of claims 1 to 3.

11. A terminal comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor runs the computer program, the steps of the service switching method according to any one of claims 4 to 6 are performed.

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