WO2022012170A1

WO2022012170A1 - Broadcast/multicast transmission mode switching method, terminal and base station

Info

Publication number: WO2022012170A1
Application number: PCT/CN2021/095656
Authority: WO
Inventors: 王俊伟
Original assignee: 大唐移动通信设备有限公司
Priority date: 2020-07-15
Filing date: 2021-05-25
Publication date: 2022-01-20
Also published as: CN113950002B; CN116095615A; CN113950002A

Abstract

The embodiments of the present disclosure provide a broadcast/multicast transmission mode switching method, a terminal and a base station. The method comprises: acquiring a target transmission mode of a broadcast/multicast service, and acquiring configuration information of the target transmission mode; and receiving the broadcast/multicast service on the basis of the configuration information of the target transmission mode. The target transmission mode is a PTP mode or a PTM mode, and the way of acquiring the target transmission mode comprises any of the following: acquiring a target transmission mode indicated by the base station in a DCI, acquiring a target transmission mode indicated by the base station in a multicast control channel (MCCH), acquiring a target transmission mode indicated by the base station by means of MAC-CE, and acquiring a target transmission mode by means of a preset timer. The embodiments of the present disclosure can quickly indicate the transmission mode of a broadcast/multicast service.

Description

A kind of switching method, terminal and base station of broadcast multicast transmission mode

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number 2020106822289 filed on July 15, 2020, and the invention title is "a handover method, terminal and base station of a broadcast multicast transmission mode", which are incorporated by reference in their entirety. into this article.

technical field

The present disclosure relates to the field of communication technologies, and in particular, to a method, terminal and base station for switching a broadcast multicast transmission mode.

Background technique

With the increasing popularity of mobile video services, peer-to-peer multicast/broadcast streaming, group communication, and broadcast/multicast Internet of Things (IoT) applications, the global mobile communication industry has reached a consensus that the fifth generation of mobile communication ( The 5th generation mobile networks (5G) network needs to have the ability to flexibly and dynamically allocate wireless spectrum and network resources between unicast services and multicast services, and needs to support independent deployment of broadcast/multicast networks.

In the current 5G, the base station sends two types of data, one is terminal-oriented data, which can only be received by the target terminal, and this data becomes unicast data; the other is for all terminals in the cell or specific Data of the group, that is, all users in the cell or users of a specific group can receive the service.

In the technological evolution of New Radio (NR), in order to perform broadcast multicast transmission more efficiently, two transmission modes are supported, namely point-to-point (PTP) transmission mode and point-to-multipoint (point to multi) transmission mode. -point, PTM) transmission mode. Among them, the PTP mode means that the sending node (base station) transmits data based on a single terminal, that is, the scheduling signaling and the corresponding scheduling data are carried out for one terminal; the feature of this method is that the base station can adjust the data according to the channel conditions of the terminal. When there are fewer users receiving broadcast multicast services (that is, when there are fewer terminals that need to receive services in PTP mode), it is beneficial to save air interface resources. The PTM method means that the sending node transmits data based on multiple terminals, that is, the scheduling signaling and the corresponding scheduling data are carried out for a group of terminals; When the number of receiving terminals is large, it is beneficial to save air interface resources.

When the transmission mode needs to be converted between the PTP mode and the PTM mode, how to effectively and quickly indicate that the transmission mode has changed to avoid wasting air interface resources is a problem that needs to be studied at present.

SUMMARY OF THE INVENTION

Embodiments of the present disclosure provide a method, terminal, and base station for switching a broadcast multicast transmission mode, so as to quickly indicate the transmission mode of the broadcast multicast service.

An embodiment of the present disclosure provides a method for switching a broadcast multicast transmission mode, which is applied to a terminal, including:

acquiring the target transmission mode of the broadcast multicast service, and acquiring the configuration information of the target transmission mode;

Receive the broadcast multicast service based on the configuration information of the target transmission mode; wherein,

The target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode;

The acquisition method of the target transmission mode includes any one of the following: acquiring the target transmission mode indicated by the base station in the downlink control information DCI, acquiring the target transmission mode indicated by the base station in the multicast control channel MCCH, Obtain the target transmission mode indicated by the base station through the medium access control-control element MAC-CE, and obtain the target transmission mode through a preset timer.

An embodiment of the present disclosure provides a method for switching a broadcast multicast transmission mode, which is applied to a base station, including:

Send the target transmission mode of the broadcast multicast service to the terminal, and send the configuration information of the target transmission mode to the terminal, so that the terminal can receive the broadcast multicast service based on the configuration information of the target transmission mode ;in,

The method of sending the target transmission mode of the broadcast multicast service to the terminal includes any one of the following: sending the target transmission mode to the terminal through the downlink control information DCI, and sending the target transmission mode to the terminal through the multicast control channel MCCH. The terminal sends the target transmission mode to the terminal through the medium access control-control unit MAC-CE.

An embodiment of the present disclosure provides a device for switching a broadcast multicast transmission mode, which is applied to a terminal, including:

an acquisition module, used for acquiring the target transmission mode of the broadcast multicast service, and acquiring the configuration information of the target transmission mode;

a receiving module, configured to receive the broadcast multicast service based on the configuration information of the target transmission mode; wherein,

An embodiment of the present disclosure provides a switching device for a broadcast multicast transmission mode, which is applied to a base station, including:

The sending module is configured to send the target transmission mode of the broadcast multicast service to the terminal, and send the configuration information of the target transmission mode to the terminal, so that the terminal can receive the target transmission mode based on the configuration information of the target transmission mode. the above-mentioned broadcast and multicast services; wherein,

An embodiment of the present disclosure provides a terminal, including a memory, a processor, and a computer program stored in the memory and running on the processor, where the processor implements a broadcast multicast transmission method applied to the terminal when the processor executes the computer program The steps of the switching method.

An embodiment of the present disclosure provides a base station, including a memory, a processor, and a computer program stored in the memory and running on the processor, where the processor implements a broadcast multicast transmission method applied to the base station when the processor executes the computer program The steps of the switching method.

Embodiments of the present disclosure provide a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, implements the steps of the method for switching the broadcast-multicast transmission mode.

The method, terminal, and base station for switching the broadcast multicast transmission mode provided by the embodiments of the present disclosure acquire the target transmission mode of the broadcast multicast service by adopting DCI, MCCH, MAC-CE, or a preset timer, that is, performing PTM. The switching of the /PTP mode makes the switching of the transmission mode of the broadcast multicast service more flexible, realizes the effective and rapid indication of the change of the transmission mode, avoids the waste of air interface resources, and effectively saves the air interface resources.

Description of drawings

In order to illustrate the embodiments of the present disclosure or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present disclosure, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a flowchart of steps of a method for switching a broadcast multicast service transmission mode applied to a terminal in an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of indicating a target transmission mode of multiple broadcast multicast services through a bitmap in an embodiment of the present disclosure;

3 is one of the schematic diagrams of the target transmission modes of grouping indicating multiple broadcast multicast services in an embodiment of the present disclosure;

FIG. 4 is the second schematic diagram of the target transmission mode of grouping indicating multiple broadcast multicast services in an embodiment of the present disclosure;

5 is a flowchart of steps of a method for switching a broadcast multicast service transmission mode applied to a base station in an embodiment of the disclosure;

6 is a block diagram of a module of an apparatus for switching a broadcast multicast service transmission mode applied to a terminal in an embodiment of the present disclosure;

7 is a block diagram of a module of an apparatus for switching a transmission mode of a broadcast multicast service applied to a base station in an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a terminal in an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a base station in an embodiment of the present disclosure.

detailed description

In order to make the purposes, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments These are some, but not all, embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

In order to clearly describe the technical solutions of the embodiments of the present disclosure, in each embodiment of the present disclosure, if words such as "first" and "second" are used to distinguish the same or similar items that have basically the same function and effect, Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order.

In the embodiments of the present disclosure, the term "and/or" describes the association relationship of associated objects, and indicates that there can be three kinds of relationships. For example, A and/or B can indicate that A exists alone, A and B exist at the same time, and B exists alone these three situations. The characters "three generally indicate that the associated objects are an "or" relationship.

In the embodiments of the present disclosure, the term "plurality" refers to two or more than two, and other quantifiers are similar.

Furthermore, it is to be understood that reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present disclosure. Thus, appearances of "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

Specifically, in the current 5G system design, the area covered by a base station cell is divided into multiple areas, and each area is divided into a system synchronous block (SSB) coverage area. When a system broadcast message is sent, each Each area will send a system broadcast message with the same content. In order to ensure the continuity of coverage, the SSB coverage areas are continuous and have a certain overlap area. For example, a cell is covered by 4 SSBs. Specifically, corresponding to the system broadcast message sent by each SSB coverage area, the data transmission between the SSB coverage areas is time-division, that is, the data is sent at different times. For example, assuming that the cell includes 4 SSB coverage areas, each SSB has 2 candidate times for sending scheduling system broadcast messages, and in a broadcast information monitoring time window, including 8 monitoring opportunities, then each SSB coverage area has 2 At this time, in order to make the base station scheduling flexibility, when sending broadcast information corresponding to each SSB coverage area, it is only necessary to send the scheduling information of the broadcast information to the terminal on one of the monitoring opportunities. It should be noted that the scheduling information sent at the monitoring occasion is used to instruct the base station to send the Physical Downlink Shared Channel (PDSCH) scheduling information corresponding to the broadcast information under the SSB coverage area, including the time domain and PDSCH of the PDSCH. Frequency domain location, modulation coding format and redundancy version, etc.

Broadcast and multicast services are important multimedia services that 5G needs to support. In terms of service types, they include streaming media, such as audio broadcasting and live TV; in terms of data types, they include data files for software upgrades; In terms of safety, it includes information such as earthquakes, tsunamis, or public health safety. Different services correspond to different delay requirements and data rates vary. Compared with system broadcast information, it has the characteristics of different service quality requirements and different rates. Especially for live TV services, higher service rates are required. and transmission quality requirements. In addition, in terms of transmission mode, the transmission of broadcast and multicast ancestry includes two modes: PTP and PTM. The PTM mode means that the base station establishes a wireless bearer, transmits at a single point, and receives at the same time by multiple terminals. This mode is suitable for multiple terminals ( For example, more than 10 terminals) receive broadcast and multicast service data; PTP means that the base station establishes a wireless bearer for each terminal, and this method is suitable for a small number of users to receive broadcast and multicast service data.

In addition, in the NR system, a cell supports multi-beam (beam) transmission. When the terminal and the base station transmit control channel and traffic channel data, the beam to be transmitted needs to be specified so that the receiving end can receive the data. For example, when the terminal is in the coverage area of SSB1, when the base station sends a physical downlink control channel (PDCCH), the beam sent by the base station is consistent with SSB1 (that is, PDCCH and SSB1 have Quasi Co-Location (QCL)) relationship, that is, the channel characteristics on the antenna port symbol transmitting PDCCH can be derived from the antenna port transmitting SSB1). When the terminal moves from the coverage area of SSB1 to the coverage area of SSB2, when the base station transmits PDCCH, its transmit beam needs to be adjusted to the direction of SSB2 (ie, PDCCH and SSB2 have a QCL relationship). The QCL relationship between the PDCCH and a certain SSB adopts the Transmission Configuration Indication (TCI) state. When the terminal moves from SSB1 to SSB2, the base station sends the TCI state indication through the Media Access Control-Control Element (MAC-CE) message. information.

In addition, when the conversion of PTP and PTM transmission mode occurs, the traditional process of PTP to PTM handover instruction and establishment of PTM is: the sending node indicates the transmission mode in the multicast control channel (MCCH), that is, the PTM mode; then the receiving node The (terminal) releases the PTP link, and indicates the PTM configuration information on the MCCH; and then the sending node receives the multicast broadcast service data according to the PTM configuration information. The PTM to PTP handover instruction and the traditional process of establishing PTP are: the sending node indicates the transmission mode in the MCCH, that is, the PTP mode; then the receiving node releases the PTM configuration information; and then if it is in an idle state, perform a random process to enter the link state, and establish a PTP connection to establish data transmission.

Specifically, when using MCCH to indicate the switch between PTP and PTM, a field is used to indicate the transmission mode of a specific broadcast multicast service. For example, when PTP is indicated, it indicates that a specific broadcast multicast service in the cell adopts PTP mode; when PTM is indicated, it indicates that a specific broadcast multicast service in this cell adopts PTM mode.

However, only using the MCCH to indicate the PTP/PTM switching has the following disadvantages: First, the switching instruction lags behind and cannot respond quickly to the requirement for switching the transmission mode. The main application scenario of PTP/PTM switching is to make the best resource utilization. On the one hand, handover needs to be performed when the number of service users receiving broadcast multicast and the channel changes, and it may also be necessary to perform handover when the communication load of the base station changes. The response time of the MCCH depends on the content modification period of the MCCH configuration. The more commonly used configuration period is 100 milliseconds or 1-2 seconds, and the delay is relatively large (it should be noted that configuring a shorter MCCH content modification period requires the terminal to continuously If the MCCH data is not received, the resources of the air interface are wasted, and it is not conducive to the power saving of the terminal). Second, handover instructions in units of cells will waste the air interface. For example, when there are multiple terminals in the coverage area of SSB1 that satisfy the PTM, the coverage areas of all SSBs in the cell use PTM, which will result in a waste of resources. For this, the present disclosure provides the following embodiments:

As shown in FIG. 1 , a flowchart of steps of a method for switching a transmission mode of broadcast and multicast in an embodiment of the present disclosure, the method includes the following steps:

Step 101: Acquire the target transmission mode of the broadcast multicast service, and acquire the configuration information of the target transmission mode.

Specifically, the target transmission mode of the broadcast multicast service is the PTP mode or the PTM mode.

In addition, when the terminal acquires the target transmission mode of the broadcast multicast service, the acquisition mode of the target transmission mode may include any one of the following:

Obtain the target transmission mode indicated by the base station in the DCI, obtain the target transmission mode indicated by the base station in the MCCH, obtain the target transmission mode indicated by the base station through the MAC-CE, and obtain the target transmission mode through a preset timer.

That is, the target transmission mode of the broadcast multicast service can be indicated through the DCI, MAC-CE, MCCH of the control channel or through the preset timer, so as to avoid the delay of the transmission mode switching instruction, so that the transmission of the broadcast multicast service can be quickly responded to. mode switching requirements.

In addition, specifically, the configuration information of the target transmission mode may include any of the following: control channel detection timing, PDSCH rate matching information, and partial bandwidth part (Bandwidth part, BWP) information.

Step 102: Receive a broadcast multicast service based on the configuration information of the target transmission mode.

In this step, specifically, after the configuration information of the target transmission mode is acquired, the broadcast multicast service may be received directly based on the configuration information of the target transmission mode.

For example, if the target transmission mode is PTP mode, the broadcast multicast service is received based on the configuration information of the PTP mode. If the target transmission mode is PTM mode, the broadcast multicast service is received based on the configuration information of the PTM mode, thus ensuring the broadcast multicast service. The correct reception process of the business.

In this way, in this embodiment, the target transmission mode of the broadcast multicast service is determined by adopting DCI, MCCH, MAC-CE or a preset timer, that is, the switching of the PTM/PTP mode is performed, so that the transmission mode of the broadcast multicast service is performed. The switching is more flexible, which effectively saves air interface resources.

Further, each acquisition mode of the target transmission mode will be described separately below.

First, for the way of indicating the target transmission mode through DCI:

Wherein, when the terminal acquires the target transmission mode indicated by the base station in the DCI, it may include any of the following modes:

(1) Receive the first indication information sent by the base station through dedicated DCI signaling, where the first indication information includes the identification number of the broadcast multicast service and the identification information of the target transmission mode.

It should be noted that dedicated DCI refers to a DCI format used to indicate the transmission mode of broadcast multicast services, and is distinguished from other existing DCI formats by configuring a special Radio Network Temporary Identifier (RNTI). Network Temporary Identity (ms-RNTI). At this time, the transmitting end uses ms-RNTI to scramble the DCI transmitted on the PDCCH channel, and the receiving end uses ms-RNTI to perform PDCCH detection and descrambling. The terminal can obtain the indication information of the target transmission mode and perform PTP/PTM conversion.

In addition, the dedicated DCI format includes a broadcast multicast service identification field and an identification field of the target transmission mode, wherein the broadcast multicast service identification field is used to identify the broadcast multicast service identification number, and the identification field of the target transmission mode is used to identify The target transmission mode may be, for example, 0 to identify the PTM mode and 1 to identify the PTP mode, or 1 to identify the PTM mode and 0 to identify the PTP mode, which is not specifically limited here.

In addition, specifically, when the broadcast and multicast services are at least two services configured based on a cell or an SSB coverage area, the first indication information is bitmap indication information, and each bit in the bitmap indication information corresponds to a broadcast group The target transmission mode of the broadcast service.

For example, the broadcast multicast service can be identified by the Temporary Mobile Group Identifier (TMGI), and the configuration sequence can be: TMGI-1, TMGI-2, TMGI-3...TMGI-N. At this time, in the dedicated DCI signaling, the bit In the figure, each bit corresponds to the target transmission mode of a broadcast multicast service, that is, the bitmap indicates the transmission mode of the corresponding TMGI, and the sequence of each bit corresponds to the configured broadcast multicast service, as shown in Figure 2. In FIG. 2 , the target transmission modes of the broadcast multicast services identified as TMGI-1 to TMGI-12 are indicated by a bitmap indication mode, where 0 represents the PTM mode and 1 represents the PTM mode.

In addition, specifically, when the broadcast multicast services are at least two services configured based on the cell or SSB coverage area, and the number of bits borne by the dedicated DCI signaling is less than the total configured number of broadcast multicast services, the first indication information It includes at least two groups of bitmap indication information, and each group of bitmap indication information is used to indicate the target transmission mode of the broadcast multicast service of the same transmission mode.

For example, if a total of M broadcast multicast services that need to be indicated by dedicated DCI signaling are configured, the maximum number of bits carried by the dedicated DCI signaling is N, and M>N, the grouping method used at this time can be:

Divide M into L groups, each of the L-1 groups contains K services

Group L contains (MK*(L-1)) services, where

Indicates rounded up. Also, in an N-bit bitmap,

Indicates the group number, and K indicates the transmission mode corresponding to the K services.

In addition, after the base station configures the values of M and N, the terminal and the base station determine the numerical methods of L and K as follows:

When the equation holds, L takes the smallest value in the array {1,2,3...N-1}. An example is as follows:

For example, when N=16, M<=16, L=1, the number of groups is 1, and the indication mode is a special case of not grouping.

For another example, as shown in Figure 3, when N=16, M=25, L=2, and the number of groups is 2, among the 16 bits of the dedicated DCI, 1 bit represents the group number, and the remaining 15 bits are indicated by a bitmap. The transmission mode of the corresponding broadcast multicast service; that is, the transmission mode of a group of broadcast multicast services whose group number is 0 is indicated in a set of bitmap indication information in FIG. 3 .

For another example, as shown in Figure 4, when N=16, M=40, L=3, and the number of groups is 3, among the 16 bits of the dedicated DCI, 2 bits represent the group number, and the remaining 14 bits are indicated by a bitmap. The transmission mode of the corresponding broadcast multicast service; that is, in a group of bitmap indication information in FIG. 4 , the transmission mode of a group of broadcast multicast services whose group number is 2 (corresponding to 01) is indicated.

In this way, the target transmission mode of the broadcast multicast service is indicated by means of a bitmap, which reduces the overhead of dedicated DCI.

(2) Receive the second indication information sent by the base station through the DCI of broadcast multicast, where the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode.

Specifically, when the second indication information is indicated through the DCI of the broadcast multicast, when the current transmission mode of the broadcast multicast service is the PTP mode, the second indication information is indicated in the DCI scheduled by the unicast. When the current transmission mode is PTM, the second indication information is indicated in the DCI of the multicast scheduling.

In addition, specifically, the manner in which the broadcast multicast DCI includes the second indication information may include:

An indication field is newly added to the DCI of broadcast multicast, and the indication field contains second indication information; or, the meaning of the original target field in the DCI of broadcast multicast is redefined as the second indication information.

Specifically, when adding an indication field to the DCI, the content information of the original DCI needs to be added, and the total size (size, the sum of the bits of all information fields) of the relevant DCI is increased. For example, adding 1 bit to the DCI indicates the second indication information (for example: 0 means keep the current mode unchanged, 1 means the transmission mode is switched, or vice versa), that is, it indicates that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission method, the implementation process of this method is simple.

In addition, specifically, the original target field includes any one of the following: DCI indication format, PUCCH power control parameter, HARQ process ID, frequency domain resource allocation indication (for example: using a combination that is not used in frequency domain resource indication) , such as: all "1"), time domain resource allocation indication. That is, by modifying the original meaning of any of the above target original fields, the original meaning of the above target original fields is redefined as the second indication information, which is beneficial for the terminal to perform channel detection and reduces the channel detection capability requirement.

In this way, the indication of the target transmission mode by means of DCI is realized by any one of the above two manners.

In addition, it should be noted here that when the target transmission mode is the PTM mode, the DCI used to indicate the target transmission mode also includes carrier indication information and/or BWP information. This enables the terminal to receive the corresponding PDSCH according to the carrier indication information in the DCI when the PDSCH used for transmitting the broadcast multicast service and the carrier sent by the PDCCH are on different carriers or BWPs.

Second, for the method of indicating the target transmission mode through the MCCH:

Wherein, when acquiring the target transmission mode indicated by the base station in the MCCH, the terminal may receive third indication information periodically sent by the base station through the MCCH.

Specifically, the third indication information includes the target transmission mode of the broadcast multicast service, the carrier or cell information for sending the broadcast multicast service, and the index of the SSB when the broadcast multicast service is sent in units of at least one SSB coverage area. No.

For example, the content included in the third indication information is as follows:

TMG1=1, indicating that the broadcast multicast service identification number is 1;

Cell ID=3, indicating that the cell identification number is 3;

SSB index=0, mode=PTP, indicating that when the index number of the SSB coverage area is 0, the target transmission mode is the PTP mode;

SSB index=1, mode=PTM, indicating that when the index number of the SSB coverage area is 1, the target transmission mode is the PTM mode;

SSB index=2, mode=PTM, indicating that when the index number of the SSB coverage area is 2, the target transmission mode is the PTM mode;

SSB index=3, mode=PTP, indicating that when the index number of the SSB coverage area is 3, the target transmission mode is the PTP mode.

The above example defines that the broadcast multicast service identification number is 1 to be sent in cell 3, where the SSB0 of cell 3 uses PTP transmission, the SSB1 of cell 3 uses PTM transmission, and the SSB2 of cell 3 uses PTM. The transmission mode is sent, and the transmission mode of PTP is used to send under the SSB3 of cell 3.

In this way, the target transmission mode is periodically indicated by the above-mentioned MCCH method, so that the terminal newly accessing and receiving the broadcast multicast service can obtain the transmission mode of the specific broadcast multicast service.

Third, for the method of indicating the target transmission mode through the MAC-CE:

Wherein, when acquiring the target transmission mode indicated by the base station through the MAC-CE, the terminal may receive fourth indication information sent by the base station through the MAC-CE.

Specifically, the fourth indication information includes a control resource set identification number and a transmission configuration indication (TCI) state identification number, wherein the TCI state identification number is associated with the SSB index number.

Specifically, for the method of indicating the target transmission mode through MAC-CE, the main application scenario is that the terminal moves from one SSB coverage area to another SSB coverage area. When the terminal moves from one SSB coverage area (eg SSB-index=1) to another SSB coverage area (eg SSB-index=2), the fourth indication information sent by the MAC-CE can be used to inform the target of the broadcast multicast service. The transmission method is indicated. At this time, the field contents of the MAC-CE are shown in the following table:

When it is detected that the SSB index associated with the resource set of the control channel for transmitting broadcast multicast data (the control resource set of PTP or PTM) changes, the broadcast multicast transmission mode corresponding to the SSB coverage area is periodically indicated based on the MCCH, so that A certain SSB index has a corresponding broadcast multicast transmission mode, so that the terminal can obtain the target transmission mode of the broadcast multicast service of the corresponding SSB through the changed SSB index number. That is, when the broadcast multicast transmission mode of the corresponding SSB before the SSB index conversion is the PTM mode, and the broadcast multicast transmission mode of the corresponding SSB after the SSB index conversion is PTP, it means switching to the PTP mode.

Fourth, for the method of instructing the target transmission mode through the preset timer:

Wherein, when the terminal obtains the target transmission mode through the preset timer, when the terminal does not receive the DCI of the broadcast multicast service within the timing period of the preset timer, the target transmission mode of the broadcast multicast service may be determined as a target transmission mode other than the current Another transmission mode other than the transmission mode is to switch the transmission mode.

Specifically, when the service transmission of broadcast multicast is in a certain mode, the terminal detects the corresponding control channel on the detection opportunity of the corresponding mode. If the base station sends a notification, but the terminal does not detect it), it is considered that the transmission mode of broadcast multicast has changed, and the terminal switches to another transmission mode to detect the corresponding control channel on the detection opportunity.

The target transmission mode is indicated by a preset timer, so that the transmission mode can also be switched in the case that the terminal cannot receive the information.

In this way, the above embodiment realizes the indication of the target transmission mode of the broadcast multicast service by means of DCI, MCCH, MAC-CE or a preset timer, that is, the switching instruction of the transmission mode of the broadcast multicast service is realized, which is equivalent to The prior art makes the switching of the transmission mode more flexible and effectively saves air interface resources.

It should also be noted that when the terminal is in the connected state, the terminal measures the adjacent SSBs and reports the measurement results to the base station, and the base station determines the timing for the terminal to perform SSB handover, thereby ensuring effective operation in a specific SSB coverage area. PTP/PTM switching. When the terminal is in the idle state, the terminal can only receive broadcast multicast services sent by PTM. When the SSB coverage area is changed due to movement, the terminal selects the SSB coverage area according to the mobility measurement result.

Further, when acquiring the target transmission configuration information in this embodiment, before acquiring the target transmission mode of the broadcast multicast service, the configuration information of the PTP mode and the configuration information of the PTM mode sent by the base station through high-layer signaling may be received. or, after acquiring the target transmission mode of the broadcast multicast service, receive the configuration information of the target transmission mode sent by the base station.

That is, the base station can send the configuration information of PTM and PTP to the terminal in advance through high-level signaling, and directly apply the configuration information of PTM or PTP after the terminal obtains the target transmission mode of the broadcast multicast service without re-acquiring from the base station, so that the It is possible to further reduce the time delay of transmission mode conversion. Certainly, the base station may also receive the configuration information of the target transmission mode sent by the base station after acquiring the target transmission mode of the broadcast multicast service, so as to avoid receiving the configuration information of the invalid transmission mode.

In addition, specifically, the configuration information includes control channel detection timing corresponding to the transmission mode and/or PDSCH rate matching information.

In addition, it should be noted here that the control channel detection timing is configured based on a single broadcast multicast service or based on a group of broadcast multicast services; the rate matching information of the PDSCH corresponding to the PTM mode is configured based on a group of terminals.

In addition, further, in this embodiment, when the target transmission mode is the PTP mode and the terminal is in an idle state, the terminal can receive the random access channel RACH resources configured by the base station for establishing PTP; or, when the target transmission mode is In the PTP mode and the terminal is in an idle state, the terminal may generate a random number, and perform a random access process when the random number is greater than the preset access factor.

It should be noted here that the RACH resource is an additional RACH resource, which can be configured through broadcast or multicast messages, so that the terminal can initiate a random access procedure on the additionally configured RACH resource, avoiding the problem of instantaneous network congestion.

In this way, the problem of instantaneous network congestion caused when the transmission mode of the broadcast multicast service is the PTP mode and there are a large number of idle terminals that need to perform the random access procedure is avoided.

In addition, further, in this embodiment, the target transmission mode of the broadcast multicast service is configured in units of a single SSB coverage area or a group of SSB coverage areas. This makes the indication granularity of the transmission mode at the SSB coverage area level, which is finer than that at the cell level, which further saves air interface resources.

In the method for switching the transmission mode of the broadcast multicast service provided in this embodiment, the target transmission mode of the broadcast multicast service is determined by adopting DCI, MCCH, MAC-CE or a preset timer, that is, the PTM/PTP mode is performed. Switching makes the switching of the transmission mode of the broadcast multicast service more flexible, and effectively saves air interface resources.

As shown in FIG. 5 , it is a flowchart of steps of a method for switching a broadcast multicast service transmission mode applied to a base station in an embodiment of the present disclosure, and the method includes the following steps:

Step 501: Send the target transmission mode of the broadcast multicast service to the terminal, and send the configuration information of the target transmission mode to the terminal.

In this step, the base station sends the target transmission mode of the broadcast multicast service to the terminal, and sends the configuration information of the target transmission mode to the terminal, so that the terminal can receive the broadcast multicast service based on the configuration information of the target transmission mode.

In addition, the method of sending the target transmission mode of the broadcast multicast service to the terminal includes any one of the following: sending the target transmission mode to the terminal through DCI, sending the target transmission mode to the terminal through MCCH, sending the target transmission mode through MAC-CE sent to the terminal.

That is, the base station can indicate the target transmission mode of the broadcast multicast service through DCI, MAC-CE or MCCH, so as to avoid the delay of the transmission mode switching instruction, so that the request for the transmission mode switching of the broadcast multicast service can be quickly responded.

In addition, specifically, the configuration information of the target transmission mode may include control channel detection timing and/or PDSCH rate matching information.

In this way, in this embodiment, by using DCI, MCCH or MAC-CE to indicate the target transmission mode of the broadcast multicast service, that is, switching the PTM/PTP mode, the switching of the transmission mode of the broadcast multicast service is more flexible and effectively saves money. air interface resources.

Further, each indication mode of the target transmission mode will be described separately below.

First, for the way of indicating the target transmission mode through DCI:

Wherein, when the base station sends the target transmission mode to the terminal through DCI, it may include any of the following modes:

(1) Send the first indication information through dedicated DCI signaling, wherein the first indication information includes the identification number of the broadcast multicast service and the identification information of the target transmission mode.

Specifically, when the broadcast multicast services are at least two services configured based on the cell or the SSB coverage area, the first indication information is bitmap indication information, and each bit in the bitmap indication information corresponds to a broadcast multicast service target transmission method.

In addition, specifically, when the broadcast and multicast services are at least two services configured based on the cell or SSB coverage area, and the number of bits borne by the dedicated DCI signaling is less than the configured total number of broadcast and multicast services, the first indication information It includes at least two groups of bitmap indication information, and each group of bitmap indication information is used to indicate the target transmission mode of the broadcast multicast service of the same transmission mode.

(2) Send second indication information through the DCI of broadcast multicast, where the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode.

Specifically, the manner in which the broadcast-multicast DCI includes the second indication information may include: an indication field is newly added to the broadcast-multicast DCI, and the indication field includes the second indication information; The meaning of the original field of the target is redefined as the second indication information.

In addition, specifically, the target original field includes any one of the following: DCI indication format, PUCCH power control parameter, HARQ process number, frequency domain resource allocation indication, and time domain resource allocation indication.

In addition, it should be noted here that when the target transmission mode is the PTM mode, the DCI used to indicate the target transmission mode also includes carrier indication information.

Wherein, when the target transmission mode is sent to the terminal through the MCCH, the third indication information may be sent periodically through the MCCH.

The third indication information includes the target transmission mode of the broadcast multicast service, carrier or cell information for sending the broadcast multicast service, and the index number of the SSB when the broadcast multicast service is sent in units of at least one SSB coverage area.

Wherein, when the base station sends the target transmission mode to the terminal through the MAC-CE, the base station may send the fourth indication information through the MAC-CE,

The fourth indication information includes a control resource set identification number and a transmission configuration indication TCI state identification number, wherein the TCI state identification number is associated with the SSB index number.

In this way, the above embodiment realizes the indication of the target transmission mode of the broadcast multicast service through the DCI, MCCH or MAC-CE mode, that is, realizes the switching instruction of the transmission mode of the broadcast multicast service, which is equivalent to the prior art, so that the transmission The mode switching is more flexible, which effectively saves air interface resources.

It should be noted here that, for the specific content of any of the above manners, reference may be made to the relevant content of the terminal-side method embodiment, which will not be described in detail here.

Further, when the configuration information of the target transmission mode is sent to the terminal in this embodiment, the configuration information of the PTP mode and the PTM mode may be sent through high-level signaling before the target transmission mode of the broadcast multicast service is sent to the terminal. The configuration information of the target transmission mode is sent to the terminal; or, after the target transmission mode of the broadcast multicast service is sent to the terminal, the configuration information of the target transmission mode is sent to the terminal; wherein, the configuration information includes the control channel detection timing of the corresponding transmission mode and /or rate matching information of the physical downlink shared channel PDSCH.

In addition, further, in this embodiment, when the target transmission mode is the PTP mode and the terminal is in an idle state, the base station may further configure the random access channel RACH resource used by the terminal to establish the PTP.

It should be noted here that, for the specific content of the foregoing embodiment, reference may be made to the relevant content of the method embodiment at the terminal side, which will not be repeated here.

The method for switching the transmission mode of the broadcast multicast service provided in this embodiment makes the switching of the transmission mode of the broadcast multicast service more flexible by using DCI, MCCH or MAC-CE to indicate the target transmission mode of the broadcast multicast service. , effectively saving air interface resources.

The present disclosure will be specifically described below through specific embodiments.

First embodiment:

In this embodiment, the target transmission mode of the broadcast multicast service is indicated by dedicated DCI signaling, which specifically includes the following steps:

Step 1, the base station indicates the target transmission mode of the broadcast multicast service through dedicated DCI signaling.

Specifically, dedicated DCI signaling refers to a DCI format used to indicate the transmission mode of broadcast multicast services. This format can be distinguished from other existing DCI formats by configuring a special Radio Network Temporary Identifier (RNTI), such as defining mode conversion. Wireless Network Temporary Identifier (ms-RNTI), at this time, the sender (which can be a base station) uses ms-RNTI to scramble the DCI transmitted on the PDCCH channel, and the receiver (which can be a terminal) uses ms-RNTI to detect and decipher the PDCCH scrambling to obtain PTP/PTM conversion information. Specifically, the content of the dedicated DCI signaling format includes the following:

Broadcast multicast service identification field, which is used to indicate the broadcast multicast service identification number;

The identification field of the target transmission mode, this field is used to identify the target transmission mode, for example, "0" may be used to identify the PTM mode, "1" may be used to identify the PTP mode, or "1" may be used to identify the PTM mode, and "0" may be used to identify the PTP mode. This does not specifically limit this.

Further, in order to reduce the overhead of dedicated DCI signaling, a bitmap can be used to indicate the target transmission mode of the broadcast multicast service, and the specific indication mode is as follows:

When the broadcast and multicast services are at least two services in the cell or in a certain SSB coverage area configured by the base station through the broadcast channel (BCCH) or the multicast control channel (MCCH) or RRC signaling, these services can use the temporary mobility group The identification (TMGI) is used for identification, and the configuration sequence can be: TMGI-1, TMGI-2, TMGI-3...TMGI-N. At this time, in the dedicated DCI signaling, each bit in the bitmap corresponds to a broadcast multicast The target transmission mode of the service, that is, the bitmap indicates the transmission mode of the corresponding TMGI, and each bit sequence corresponds to the configured broadcast multicast service, as shown in Figure 2. In FIG. 2, 0 represents the PTM method, and 1 represents the PTM method.

In addition, when the number of bits carried by the dedicated DCI signaling is less than the configured total number of broadcast multicast services, a grouping indication method can be used, that is, at least two sets of bitmap indication information are included in the dedicated DCI signaling, and each set of bits The map indication information is used to indicate the target transmission mode of the broadcast multicast service of the same transmission mode. For example, if a total of M broadcast multicast services that need to be indicated by dedicated DCI signaling are configured, the maximum number of bits carried by the dedicated DCI signaling is N, and M>N, the grouping method used at this time can be:

Divide M into L groups, each of the L-1 groups contains K services

The Lth group contains (MK*(L-1)) services. Also, in an N-bit bitmap,

In this way, through the above grouping method, when the value of N is determined, the base station and the terminal can adaptively group the target transmission method of the broadcast multicast service according to the change of the value of M.

Step 2, the terminal acquires the configuration information of the transmission mode of the corresponding broadcast multicast service.

Specifically, the configuration information includes the control channel detection timing corresponding to the transmission mode and/or the rate matching information of the PDSCH.

The control channel detection timing refers to the time (time slot or symbol) at which the terminal detects the control channel when receiving the broadcast multicast service. The base station configures the detection timing according to the service characteristics, so that the terminal can receive the control channel at a specific time, which has the effect of saving power. It should be noted here that the detection timing may be configured based on a single service (eg, associated with TMGI), or may be configured based on a group of services. Of course, the configuration information may be configured through RRC signaling, broadcast signaling, or multicast signaling.

The rate matching information of PDSCH means that when the base station sends PDSCH data for scheduling broadcast multicast, some resource units that cannot be occupied by PDSCH are deducted from the scheduled frequency domain or time resources, which ensures the flexibility of base station invocation. It should be noted that these resources (time information and frequency domain information) that cannot be occupied by invocation are configured through RRC signaling, broadcast signaling, or multicast signaling. In addition, with respect to the rate matching information scheduled by the PTP, the rate matching information of the PTM is configured independently, that is, the configuration is effective for a group of terminals.

In addition, step 2 may be performed after step 1, that is, the base station sends the configuration information of the target transmission mode according to the target transmission mode of the broadcast multicast service. Of course, this step can also be performed before step 1, that is, the base station configures both the configuration information of the PTP mode and the configuration information of the PTM mode to the terminal, and the terminal selects the configuration information of the target transmission mode according to the target transmission mode.

Step 3: Receive the broadcast multicast service based on the configuration information of the target transmission mode.

Specifically, the terminal may detect the scheduling signaling DCI according to the configuration information of the target transmission mode, and receive PDSCH data on the current carrier or other carriers according to the DCI indication.

In addition, the terminal adopts different receiving processing methods for different transmission modes, and the specific receiving processing methods are as follows:

When the target transmission mode is the PTM mode, the terminal starts to detect the control channel at the detection timing configured in the PTM mode. When the corresponding scheduling information is detected, DCI parsing is performed in the format of group scheduling. If the DCI contains a rate matching indication, the parsing is performed according to the rate matching information configured in the PTM mode, and the detection is stopped at the detection timing configured in the PTP mode. control channel.

When the target transmission mode is PTP, the terminal starts to detect the control channel at the detection timing configured by the PTP mode. When the corresponding scheduling information is detected, it performs DCI analysis in the format of unicast scheduling. For example, when the DCI contains a rate matching indication, Then, it parses according to the rate matching information configured in the PTP mode, and stops detecting the control channel at the detection timing configured in the PTM mode.

Specifically, in order to increase the flexibility of base station scheduling, when the target transmission mode is the PTM mode, the DCI of the group scheduling information contains carrier indication information (that is, the carriers sent by PDSCH and PDCCH are on different carriers). At this time, the terminal The corresponding PDSCH is received according to the configured carrier indication information.

Second embodiment:

In this embodiment, the target transmission mode of the broadcast multicast service is indicated by the DCI signaling of broadcast multicast scheduling, which specifically includes the following steps:

Step 1, the base station indicates the target transmission mode of the broadcast multicast service through the DCI signaling of the broadcast multicast scheduling.

Specifically, when the DCI support of broadcast multicast indicates that the transmission mode of the broadcast multicast service is changed, any of the following methods may be adopted:

First, an indication field for indicating that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode is added.

In this way, the content information of the original DCI needs to be increased, and the total size of the relevant DCI (size, the sum of the bits of all information fields) is increased). For example, adding 1 bit to the DCI indicates that the switching of the PTP or PTM mode will be performed. The implementation process of this method is simple.

Second, redefine the meaning of the original target field in the DCI of the broadcast multicast as second indication information, and the second indication information is used to instruct the transmission mode of the broadcast multicast service to be switched from the current transmission mode to the target transmission mode.

In this case, modify the content meaning of the original DCI, and the total SIZE of the DCI remains unchanged. This method is beneficial for the terminal to perform channel detection and reduces the requirement on the channel detection capability.

Specifically, the original field of the target includes any of the following:

DCI indication format, PUCCH power control parameter, HARQ process number, frequency domain resource allocation indication, and time domain resource allocation indication.

Specifically, as shown in the following table, the signaling content of broadcast multicast scheduling is shown in the following table:

Specifically, when the switching of the transmission mode is indicated by a specific combination of the "frequency domain resource allocation indication" or "time domain resource allocation indication" field, when the frequency domain resource allocation indication is all 1, it indicates that the broadcast multicast service is In the transmission mode switching, when the time domain resource allocation indication is all 0, it indicates the transmission mode switching of the broadcast multicast service, which is not specifically limited at present.

In addition, in order to increase the flexibility of base station scheduling, when the target transmission mode is the PTM mode, the DCI of the group scheduling information contains carrier indication information (that is, the carriers sent by PDSCH and PDCCH are on different carriers). The configured carrier indication information receives the corresponding PDSCH. Specifically, the carrier indication information can also be indicated in two ways, one is to add a new information field, and the other is to redefine the meaning of the original field in the DCI.

Here, the original field of the redefinition DCI indicates the carrier indication information is described as follows:

As in the above expression, the 1-bit length of the DCI format indication (DCI formats), when the DCI is non-broadcast multicast (the non-broadcast multicast DCI here refers to the existing scheduling signaling format DCI, such as C-RNTI, CS- RNTI and MCS-RNTI are unicast data scheduled by scrambling code), which are used to indicate whether it is uplink or downlink scheduling. When DCI is broadcast multicast (the broadcast multicast DCI here is broadcast or multicast data scheduled by channel scrambling code "different from the existing unicast RNTI", such as: G-RNTI), only downlink scheduling is required, so the Bit information may be used to indicate carrier indication information.

In addition, as in the above table, the 2-bit PUCCH power control parameter is used to indicate the uplink power parameter when the DCI is non-broadcast multicast. When DCI is broadcast and multicast, because it is group scheduling, the power control parameters need to be carried out in other ways (such as based on the downlink path loss of each terminal), and the power control parameters of the uplink PUCCH can be omitted, which can be used to indicate carrier indication information. .

Step 2: The terminal acquires the configuration information of the target transmission mode.

This step is the same as step 2 of the first embodiment, and will not be repeated here.

In addition, it should be noted that when the transmission mode of broadcast and multicast is switched from PTM to PTP, if there are a large number of idle terminals that need to establish connections, that is to say, a large number of terminals perform random access procedures, which will cause the network Instantaneous congestion, this embodiment can solve the problem in the following ways:

First, configure additional RACH resources, that is, when the target transmission mode is the PTP mode and the terminal is in an idle state, it can receive the RACH resources configured by the base station for establishing PTP. Specifically, some additional RACH access resources are configured through broadcast or multicast messages. When the network instructs to switch to PTP, it also instructs that these RACH resources take effect. Terminals that need to establish connections due to receiving broadcast and multicast services, some or all terminals are in Random access is initiated on additionally configured PRACH resources. In order to reduce the waste of resources, the base station indicates the validity period of the additional RACH resources, that is, during the validity period, the terminal can use the additionally configured RACH resources to initiate random access. The additional RACH resource may be a separately configured RACH resource, or may be a RACH resource originally configured by the base station but masked out by MASK.

Second, set the access factor, that is, when the target transmission mode is PTP mode and the terminal is in an idle state, the terminal generates a random number, and when the random number is greater than the preset access factor, the random access process is performed, otherwise, it waits for a certain period of time. Initiate random access again.

Step 3: Receive the broadcast multicast service according to the configuration information of the target transmission mode.

Specifically, the terminal detects the scheduling signaling DCI according to the configuration information of the target transmission mode, and receives PDSCH data on the current carrier or other carriers according to the DCI instruction.

When the DCI analysis result is that PTP occurs, the terminal starts to detect the control channel at the detection timing configured for the PTP mode, and stops the behavior of detecting the control channel at the detection timing configured for the PTM mode.

Embodiment three:

In this embodiment, the target transmission mode of the broadcast multicast service is indicated by a preset timer.

Specifically, indicating the target transmission mode of the broadcast multicast service based on the preset timer is a supplementary mode to the first embodiment and the second embodiment, and can be used together with the first embodiment and the second embodiment. When the terminal fails to detect the target transmission mode of the broadcast multicast service for some reason (such as poor channel quality, unable to correctly detect the relevant information, or because of the priority problem, the terminal receives the service with higher priority), based on The preset timer indicates the target transmission mode.

That is, when the service transmission of broadcast and multicast is in a certain mode, the terminal detects the corresponding control channel on the detection opportunity of the corresponding mode. Then, it is considered that the transmission mode of broadcast and multicast has changed (it may be that the base station sends a notification, but the terminal does not detect it), and the terminal switches to another transmission mode to detect the corresponding control channel.

For example, at a certain moment, the base station instructs a specific broadcast multicast service to be sent in PTM mode, the terminal detects the broadcast multicast control channel at the detection timing corresponding to the PTM mode, starts a preset timer (for example, the timer duration is 1 second), and Perform the following process:

Before the preset timer expires, if the control information of broadcast and multicast is received, the timing is restarted, and the terminal continues to detect the control channel of broadcast and multicast at the detection opportunity of PTM;

If the preset timer expires (that is, no broadcast multicast control information is received within 1 s), it is determined that the target transmission mode of the broadcast multicast service is the PTP mode, and the terminal receives the broadcast multicast service in the PTP mode.

In this way, the present disclosure realizes flexible switching of broadcast-multicast transmission modes through the above-mentioned embodiments.

In addition, as shown in FIG. 6 , it is a block diagram of a module of an apparatus for switching a broadcast multicast transmission mode applied to a terminal in an embodiment of the present disclosure, and the apparatus includes:

an obtaining module 601, configured to obtain a target transmission mode of a broadcast multicast service, and obtain configuration information of the target transmission mode;

A receiving module 602, configured to receive the broadcast multicast service based on the configuration information of the target transmission mode; wherein,

Optionally, the acquiring the target transmission mode indicated by the base station in the downlink control information DCI includes:

receiving the first indication information sent by the base station through dedicated DCI signaling, wherein the first indication information includes the broadcast multicast service identification number and the identification information of the target transmission mode; or,

The second indication information sent by the base station through the DCI of broadcast multicast is received, wherein the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode.

Optionally, when the broadcast and multicast services are at least two services configured based on a cell or a synchronization signal block SSB coverage area, the first indication information is bitmap indication information, and the bitmap indication information contains Each bit corresponds to a target transmission mode of a broadcast multicast service.

Optionally, when the broadcast and multicast services are at least two services configured based on the cell or synchronization signal block SSB coverage area, and the number of bits carried by the dedicated DCI signaling is less than the total configured number of broadcast and multicast services. When the first indication information includes at least two groups of bitmap indication information, and each group of bitmap indication information is used to indicate the target transmission mode of the broadcast multicast service of the same transmission mode.

Optionally, a manner in which the broadcast-multicast DCI includes the second indication information includes:

An indication field is newly added to the DCI of the broadcast multicast, and the indication field includes the second indication information; or,

The meaning of the original target field in the DCI of the broadcast multicast is redefined as the second indication information.

Optionally, the acquiring the target transmission mode through a preset timer includes:

When the terminal does not receive the DCI of the broadcast multicast within the timing period of the preset timer, the target transmission mode of the broadcast multicast service is determined to be another transmission mode other than the current transmission mode.

It should be noted here that the apparatus provided in this embodiment can implement all the method steps that can be implemented by the above-mentioned terminal-side method embodiments, and can achieve the same technical effect, which is not repeated here.

In addition, as shown in FIG. 7 , it is a block diagram of a module of an apparatus for switching a broadcast multicast transmission mode applied to a base station in an embodiment of the present disclosure, and the apparatus includes:

A sending module 701, configured to send the target transmission mode of the broadcast multicast service to the terminal, and send the configuration information of the target transmission mode to the terminal, so that the terminal can receive the configuration information based on the target transmission mode the broadcast multicast service; wherein,

Optionally, the sending the target transmission mode to the terminal through downlink control information DCI includes:

Send the first indication information through dedicated DCI signaling, wherein the first indication information includes the identification number of the broadcast multicast service and the identification information of the target transmission mode; or,

The second indication information is sent through the DCI of broadcast multicast, wherein the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode.

It should be noted here that the apparatus provided in this embodiment can implement all the method steps that can be implemented by the above-mentioned base station side method embodiments, and can achieve the same technical effect, which is not repeated here.

FIG. 8 is a schematic structural diagram of a terminal provided by an embodiment of the present disclosure. As shown in FIG. 8 , the terminal 800 may include: at least one processor 801 , memory 802 , at least one network interface 804 and other user interfaces 803 . The various components in the mobile terminal 800 are coupled together by a bus system 805 . It can be understood that the bus system 805 is used to implement the connection communication between these components. In addition to the data bus, the bus system 805 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, the various buses are labeled as bus system 805 in FIG. 8 .

The user interface 803 may include a display, a keyboard, or a pointing device, such as a mouse, a trackball, a touch pad, or a touch screen.

It will be appreciated that the memory 802 in embodiments of the present disclosure may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Wherein, the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory may be Random Access Memory (RAM), which acts as an external cache. By way of illustration and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) And direct memory bus random access memory (Direct Rambus RAM, DRRAM). The memory 802 of the systems and methods described in various embodiments of the present disclosure is intended to include, but not be limited to, these and any other suitable types of memory.

In some embodiments, the memory 802 stores the following elements, executable modules or data structures, or a subset thereof, or an extended set of them, such as the operating system 8021 and the application programs 8022.

The operating system 8021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks. The application program 8022 includes various application programs, such as a media player (Media Player), a browser (Browser), etc., for implementing various application services. A program implementing the method of the embodiment of the present disclosure may be included in the application program 8022 .

In this embodiment of the present disclosure, by calling the computer program or instruction stored in the memory 802, specifically, the computer program or instruction stored in the application program 8022, the processor 801 is configured to:

Acquire the target transmission mode of the broadcast multicast service, and obtain the configuration information of the target transmission mode; receive the broadcast multicast service based on the configuration information of the target transmission mode; wherein,

The target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode; the acquisition mode of the target transmission mode includes any one of the following: acquiring the target transmission mode indicated by the base station in the downlink control information DCI, acquiring The base station obtains the target transmission mode indicated by the base station in the multicast control channel MCCH, obtains the target transmission mode indicated by the base station through the medium access control-control element MAC-CE, and obtains the target transmission mode through a preset timer.

The methods disclosed in the above embodiments of the present disclosure may be applied to the processor 801 or implemented by the processor 801 . The processor 801 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above-mentioned method can be completed by an integrated logic circuit of hardware in the processor 801 or an instruction in the form of software. The above-mentioned processor 801 can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The disclosed methods, steps and logical block diagrams in the embodiments of the present disclosure can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the methods disclosed in conjunction with the embodiments of the present disclosure may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory 802, and the processor 801 reads the information in the memory 802, and completes the steps of the above method in combination with its hardware.

It will be appreciated that the embodiments described in this disclosure may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more Application Specific Integrated Circuits (ASIC), Digital Signal Processing (DSP), Digital Signal Processing Device (DSP Device, DSPD), programmable Programmable Logic Device (PLD), Field-Programmable Gate Array (FPGA), general purpose processor, controller, microcontroller, microprocessor, other for performing the functions described in this disclosure electronic unit or a combination thereof.

For software implementation, the described techniques may be implemented through modules (eg, procedures, functions, etc.) that perform the functions described in the embodiments of the present disclosure. Software codes may be stored in memory and executed by a processor. The memory can be implemented in the processor or external to the processor.

Optionally, as another embodiment, the processor 801 is further configured to: receive first indication information sent by the base station through dedicated DCI signaling, where the first indication information includes a broadcast multicast service identification number and all The identification information of the target transmission mode; or, receiving the second indication information sent by the base station through the DCI of broadcast multicast, wherein the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission method.

Optionally, as another embodiment, when the broadcast and multicast services are at least two services configured based on a cell or a synchronization signal block SSB coverage area, the first indication information is bitmap indication information, and all Each bit in the bitmap indication information corresponds to a target transmission mode of a broadcast multicast service.

Optionally, as another embodiment, when the broadcast multicast services are at least two services configured based on the cell or synchronization signal block SSB coverage area, and the number of bits borne by the dedicated DCI signaling is less than the configured total number of services. When the number of broadcast multicast services is equal to 100, the first indication information includes at least two sets of bitmap indication information, and each set of bitmap indication information is used to indicate the target transmission mode of the broadcast multicast service of the same transmission mode.

Optionally, as another embodiment, a manner in which the broadcast-multicast DCI includes the second indication information includes: an indication field is newly added to the broadcast-multicast DCI, and the indication field includes the second indication information; or, the meaning of the original target field in the DCI of the broadcast multicast is redefined as the second indication information.

Optionally, as another embodiment, the original target field includes any one of the following: DCI indication format, physical uplink control channel PUCCH power control parameter, HARQ process number, frequency domain resource allocation indication, time domain resource Assignment Instructions.

Optionally, as another embodiment, when the target transmission mode is the PTM mode, the DCI used to indicate the target transmission mode further includes carrier indication information.

Optionally, as another embodiment, the processor 801 is further configured to: receive third indication information periodically sent by the base station through the MCCH, where the third indication information includes the target transmission mode of the broadcast multicast service , the carrier or cell information for sending the broadcast multicast service, and the index number of the SSB when the broadcast multicast service is sent in units of at least one SSB coverage area.

Optionally, as another embodiment, the processor 801 is further configured to: receive fourth indication information sent by the base station through the MAC-CE, where the fourth indication information includes a control resource set identification number and a transmission configuration indication TCI state identification number, wherein the TCI state identification number is associated with the SSB index number.

Optionally, as another embodiment, the processor 801 is further configured to: when the terminal does not receive the DCI of the broadcast multicast within the timing duration of the preset timer, transmit the target of the broadcast multicast service The mode is determined to be another transmission mode other than the current transmission mode.

Optionally, as another embodiment, the processor 801 is further configured to: before acquiring the target transmission mode of the broadcast multicast service, receive the configuration information of the PTP mode and the configuration information of the PTM mode sent by the base station through high-layer signaling. configuration information; or, after acquiring the target transmission mode of the broadcast multicast service, receive the configuration information of the target transmission mode sent by the base station;

The configuration information includes the control channel detection timing corresponding to the transmission mode and/or the rate matching information of the physical downlink shared channel PDSCH.

Optionally, as another embodiment, the control channel detection timing is configured based on a single broadcast multicast service or based on a group of broadcast multicast services; the rate matching information of the PDSCH corresponding to the PTM mode is based on a group of terminal to configure.

Optionally, as another embodiment, the processor 801 is further configured to: when the target transmission mode is the PTP mode and the terminal is in an idle state, receive a random access channel RACH resource configured by the base station for establishing PTP; or , when the target transmission mode is the PTP mode and the terminal is in an idle state, the terminal generates a random number, and performs a random access process when the random number is greater than a preset access factor.

Optionally, as another embodiment, the target transmission mode of the broadcast multicast service is configured in units of a single SSB coverage area or a group of SSB coverage areas.

The terminal provided by the embodiments of the present disclosure can implement each process implemented by the terminal in the foregoing embodiments, and to avoid repetition, details are not described herein again.

FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present disclosure. As shown in FIG. 9 , the base station 900 may include at least one processor 901 , a memory 902 , at least one other user interface 903 , and a transceiver 904 . The various components in base station 900 are coupled together by bus system 905 . It can be understood that the bus system 905 is used to implement the connection communication between these components. In addition to the data bus, the bus system 905 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, the various buses are labeled as bus system 905 in FIG. 9 , and the bus system may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 901 and memory 902 The various circuits representing the memory are linked together. The bus system can also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore will not be further described in the embodiments of the present disclosure . The bus interface provides the interface. Transceiver 904 may be a number of elements, including a transmitter and a receiver, that provide a means for communicating with various other devices over a transmission medium. For different user equipments, the user interface 903 may also be an interface capable of externally connecting the required equipment, and the connected equipment includes but is not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

It will be appreciated that the memory 902 in embodiments of the present disclosure may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Wherein, the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory may be Random Access Memory (RAM), which acts as an external cache. By way of illustration and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) And direct memory bus random access memory (Direct Rambus RAM, DRRAM). The memory 902 of the systems and methods described in various embodiments of the present disclosure is intended to include, but not be limited to, these and any other suitable types of memory.

The processor 901 is responsible for managing the bus system and general processing, and the memory 902 can store computer programs or instructions used by the processor 901 when performing operations. Specifically, the processor 901 can be used for: the target transmission mode of the broadcast multicast service. send to the terminal, and send the configuration information of the target transmission mode to the terminal, so that the terminal can receive the broadcast multicast service based on the configuration information of the target transmission mode; wherein,

The target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode; the mode of sending the target transmission mode of the broadcast multicast service to the terminal includes any one of the following: sending the target transmission mode through downlink control information DCI To the terminal, the target transmission mode is sent to the terminal through the multicast control channel MCCH, and the target transmission mode is sent to the terminal through the medium access control-control unit MAC-CE.

The methods disclosed in the above embodiments of the present disclosure may be applied to the processor 901 or implemented by the processor 901 . The processor 901 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above-mentioned method may be completed by an integrated logic circuit of hardware in the processor 901 or an instruction in the form of software. The above-mentioned processor 901 can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The disclosed methods, steps and logical block diagrams in the embodiments of the present disclosure can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the methods disclosed in conjunction with the embodiments of the present disclosure may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory 902, and the processor 901 reads the information in the memory 902, and completes the steps of the above method in combination with its hardware.

Optionally, as another embodiment, the processor 901 is further configured to: send first indication information through dedicated DCI signaling, where the first indication information includes a broadcast multicast service identification number and the target transmission or the second indication information is sent through the DCI of broadcast multicast, wherein the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode.

Optionally, as another embodiment, the processor 901 is further configured to: periodically send third indication information through the MCCH, where the third indication information includes the target transmission mode, sending method of the broadcast multicast service The carrier or cell information of the broadcast multicast service, and the index number of the SSB when the broadcast multicast service is sent in units of at least one SSB coverage area.

Optionally, as another embodiment, the processor 901 is further configured to: send fourth indication information through the MAC-CE, where the fourth indication information includes a control resource set identification number and a transmission configuration indication TCI state identification number, wherein The TCI state identification number is associated with the SSB index number.

Optionally, as another embodiment, the processor 901 is further configured to: before sending the target transmission mode of the broadcast multicast service to the terminal, send the configuration information of the PTP mode and the configuration information of the PTM mode through high-layer signaling. sending the configuration information to the terminal; or, after sending the target transmission mode of the broadcast multicast service to the terminal, sending the configuration information of the target transmission mode to the terminal;

Optionally, as another embodiment, the processor 901 is further configured to: when the target transmission mode is the PTP mode and the terminal is in an idle state, configure the terminal to use a random access channel RACH resource for establishing PTP.

The base station provided in the embodiments of the present disclosure can implement each process implemented by the base station in the foregoing embodiments, and to avoid repetition, details are not described herein again.

The foregoing mainly introduces the solutions provided by the embodiments of the present disclosure from the perspective of electronic devices. It can be understood that, in order to realize the above-mentioned functions, the electronic device provided by the embodiments of the present disclosure includes corresponding hardware structures and/or software modules for executing each function. Those skilled in the art should easily realize that the present disclosure can be implemented in hardware or a combination of hardware and computer software with the units and algorithm steps of each example described in conjunction with the embodiments disclosed in the present disclosure.

Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this disclosure.

In the embodiments of the present disclosure, functional modules can be divided into electronic devices and the like according to the foregoing method examples. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules.

It should be noted that, the division of modules in the embodiments of the present disclosure is schematic, and is only a logical function division, and there may be other division manners in actual implementation.

Those skilled in the art can clearly understand that, for the convenience and conciseness of the description, only the division of the above-mentioned functional modules is used for illustration. In practical applications, the above-mentioned functions can be allocated to different functional modules as required. The internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the system, apparatus and unit described above, reference may be made to the corresponding process in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided in the present disclosure, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be Incorporation may either be integrated into another system, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection of devices or units through some interfaces.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium and includes several instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present disclosure. The computer storage medium is a non-transitory (English: nontransitory) medium, including: flash memory, removable hard disk, read-only memory, random access memory, magnetic disk or optical disk and other mediums that can store program codes.

On the other hand, an embodiment of the present disclosure also provides a computer program product, the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program includes program instructions, when the program instructions When executed by a computer, the computer can execute the methods provided by the above method embodiments.

On the other hand, an embodiment of the present disclosure also provides a non-transitory computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, implements the method steps provided in the above embodiments and can achieve the same The technical effect will not be repeated here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, but not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

A method for switching a broadcast multicast transmission mode, applied to a terminal, is characterized in that, comprising:

acquiring the target transmission mode of the broadcast multicast service, and acquiring the configuration information of the target transmission mode;

Receive the broadcast multicast service based on the configuration information of the target transmission mode; wherein,

The target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode;

The acquisition method of the target transmission mode includes any one of the following: acquiring the target transmission mode indicated by the base station in the downlink control information DCI, acquiring the target transmission mode indicated by the base station in the multicast control channel MCCH, Obtain the target transmission mode indicated by the base station through the medium access control-control element MAC-CE, and obtain the target transmission mode through a preset timer.
The method for switching a broadcast-multicast transmission mode according to claim 1, wherein the acquiring the target transmission mode indicated by the base station in the downlink control information DCI comprises:

receiving the first indication information sent by the base station through dedicated DCI signaling, wherein the first indication information includes the broadcast multicast service identification number and the identification information of the target transmission mode; or,

The second indication information sent by the base station through the DCI of broadcast multicast is received, wherein the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode.
The method for switching a broadcast-multicast transmission mode according to claim 2, wherein when the broadcast-multicast services are at least two services configured based on a cell or a synchronization signal block (SSB) coverage area, the first The indication information is bitmap indication information, and each bit in the bitmap indication information corresponds to a target transmission mode of a broadcast multicast service.
The method for switching a broadcast-multicast transmission mode according to claim 2, wherein when the broadcast-multicast service is at least two services configured based on a cell or a synchronization signal block (SSB) coverage area, and the dedicated DCI When the number of bits carried by the signaling is less than the configured total number of broadcast and multicast services, the first indication information includes at least two sets of bitmap indication information, and each set of bitmap indication information is used to indicate a broadcast group of the same transmission mode The target transmission mode of the broadcast service.
The method for switching a broadcast-multicast transmission mode according to claim 2, wherein the manner in which the DCI of the broadcast-multicast includes the second indication information comprises:

An indication field is newly added to the DCI of the broadcast multicast, and the indication field includes the second indication information; or,

The meaning of the original target field in the DCI of the broadcast multicast is redefined as the second indication information.
The method for switching a broadcast multicast transmission mode according to claim 5, wherein the target original field includes any one of the following:

DCI indication format, physical uplink control channel PUCCH power control parameters, HARQ process number, frequency domain resource allocation indication, and time domain resource allocation indication.
The method for switching a broadcast-multicast transmission mode according to claim 1, wherein when the target transmission mode is the PTM mode, the DCI used to indicate the target transmission mode further includes carrier indication information.
The method for switching a broadcast-multicast transmission mode according to claim 1, wherein the acquiring the target transmission mode indicated by the base station in the multicast control channel MCCH comprises:

Receiving third indication information periodically sent by the base station through the MCCH, wherein the third indication information includes the target transmission mode of the broadcast multicast service, the carrier or cell information for sending the broadcast multicast service, and the information of the carrier or cell that transmits the broadcast multicast service at least An SSB coverage area is the index number of the SSB when the broadcast multicast service is sent.
The method for switching a broadcast-multicast transmission mode according to claim 1, wherein the acquiring the target transmission mode indicated by the base station through the medium access control-control element MAC-CE comprises:

Receive fourth indication information sent by the base station through MAC-CE, wherein the fourth indication information includes a control resource set identification number and a transmission configuration indication TCI state identification number, wherein the TCI state identification number is associated with the SSB index number.
The method for switching a broadcast-multicast transmission mode according to claim 1, wherein the acquiring the target transmission mode through a preset timer comprises:

When the terminal does not receive the DCI of the broadcast multicast within the timing period of the preset timer, the target transmission mode of the broadcast multicast service is determined to be another transmission mode other than the current transmission mode.
The method for switching a broadcast-multicast transmission mode according to claim 1, wherein the acquiring the configuration information of the target transmission mode comprises:

Before acquiring the target transmission mode of the broadcast multicast service, receive the configuration information of the PTP mode and the configuration information of the PTM mode sent by the base station through high-layer signaling; or,

After acquiring the target transmission mode of the broadcast multicast service, receive the configuration information of the target transmission mode sent by the base station;

The configuration information includes the control channel detection timing corresponding to the transmission mode and/or the rate matching information of the physical downlink shared channel PDSCH.
The method for switching a broadcast multicast transmission mode according to claim 11, wherein,

The control channel detection timing is configured based on a single broadcast multicast service or based on a group of broadcast multicast services;

The rate matching information of the PDSCH corresponding to the PTM mode is configured based on a group of terminals.
The method for switching a broadcast multicast transmission mode according to claim 1, further comprising:

When the target transmission mode is the PTP mode and the terminal is in an idle state, receive the random access channel RACH resource configured by the base station for establishing PTP; or,

When the target transmission mode is the PTP mode and the terminal is in an idle state, the terminal generates a random number, and performs a random access process when the random number is greater than a preset access factor.
The method for switching a broadcast-multicast transmission mode according to any one of claims 1 to 13, wherein the target transmission mode of the broadcast-multicast service is configured in units of a single SSB coverage area or a group of SSB coverage areas .
A method for switching a broadcast multicast transmission mode, applied to a base station, is characterized in that, comprising:

Send the target transmission mode of the broadcast multicast service to the terminal, and send the configuration information of the target transmission mode to the terminal, so that the terminal can receive the broadcast multicast service based on the configuration information of the target transmission mode ;in,

The target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode;

The method of sending the target transmission mode of the broadcast multicast service to the terminal includes any one of the following: sending the target transmission mode to the terminal through downlink control information DCI, and sending the target transmission mode to the terminal through the multicast control channel MCCH. The terminal sends the target transmission mode to the terminal through the medium access control-control unit MAC-CE.
The method for switching a broadcast-multicast transmission mode according to claim 15, wherein the sending the target transmission mode to the terminal through downlink control information DCI comprises:

Send the first indication information through dedicated DCI signaling, wherein the first indication information includes the identification number of the broadcast multicast service and the identification information of the target transmission mode; or,

The second indication information is sent through the DCI of broadcast multicast, wherein the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode.
The method for switching a broadcast-multicast transmission mode according to claim 16, wherein when the broadcast-multicast services are at least two services configured based on a cell or a synchronization signal block (SSB) coverage area, the first The indication information is bitmap indication information, and each bit in the bitmap indication information corresponds to a target transmission mode of a broadcast multicast service.
The method for switching a broadcast-multicast transmission mode according to claim 16, wherein when the broadcast-multicast service is at least two services configured based on a cell or a synchronization signal block (SSB) coverage area, and the dedicated DCI When the number of bits carried by the signaling is less than the configured total number of broadcast and multicast services, the first indication information includes at least two sets of bitmap indication information, and each set of bitmap indication information is used to indicate a broadcast group of the same transmission mode The target transmission mode of the broadcast service.
The method for switching a broadcast-multicast transmission mode according to claim 17, wherein the manner in which the DCI of the broadcast-multicast includes the second indication information comprises:

An indication field is newly added to the DCI of the broadcast multicast, and the indication field includes the second indication information; or,

The meaning of the original target field in the DCI of the broadcast multicast is redefined as the second indication information.
The method for switching a broadcast multicast transmission mode according to claim 19, wherein the target original field includes any one of the following:

DCI indication format, physical uplink control channel PUCCH power control parameters, HARQ process number, frequency domain resource allocation indication, and time domain resource allocation indication.
The method for switching a broadcast-multicast transmission mode according to claim 15, wherein when the target transmission mode is the PTM mode, the DCI used to indicate the target transmission mode further includes carrier indication information.
The method for switching a broadcast-multicast transmission mode according to claim 15, wherein the sending the target transmission mode to the terminal through a multicast control channel MCCH comprises:

Third indication information periodically sent through the MCCH, wherein the third indication information includes the target transmission mode of the broadcast multicast service, carrier or cell information for sending the broadcast multicast service, and at least one SSB The coverage area is the index number of the SSB when the broadcast multicast service is sent.
The method for switching a broadcast-multicast transmission mode according to claim 15, wherein the sending the target transmission mode to the terminal through a media access control-control unit MAC-CE comprises:

The fourth indication information is sent through the MAC-CE, wherein the fourth indication information includes a control resource set identification number and a transmission configuration indication TCI state identification number, wherein the TCI state identification number is associated with the SSB index number.
The method for switching a broadcast-multicast transmission mode according to claim 15, wherein the sending the configuration information of the target transmission mode to the terminal comprises:

Before sending the target transmission mode of the broadcast multicast service to the terminal, send the configuration information of the PTP mode and the configuration information of the PTM mode to the terminal through high-layer signaling; or,

After sending the target transmission mode of the broadcast multicast service to the terminal, send the configuration information of the target transmission mode to the terminal;

The configuration information includes the control channel detection timing corresponding to the transmission mode and/or the rate matching information of the physical downlink shared channel PDSCH.
The method for switching a broadcast multicast transmission mode according to claim 24, wherein,

The control channel detection timing is configured based on a single broadcast multicast service or based on a group of broadcast multicast services;

The rate matching information of the PDSCH corresponding to the PTM mode is configured based on a group of terminals.
The method for switching the broadcast multicast transmission mode according to claim 15, further comprising:

When the target transmission mode is the PTP mode and the terminal is in an idle state, configure the random access channel RACH resource used by the terminal to establish the PTP.
The method for switching a broadcast-multicast transmission mode according to any one of claims 15 to 26, wherein the target transmission mode of the broadcast-multicast service is configured in units of a single SSB coverage area or a group of SSB coverage areas .
A switching device of a broadcast multicast transmission mode, applied to a terminal, is characterized in that, comprising:

an acquisition module, used for acquiring the target transmission mode of the broadcast multicast service, and acquiring the configuration information of the target transmission mode;

a first receiving module, configured to receive the broadcast multicast service based on the configuration information of the target transmission mode; wherein,

The target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode;

The acquisition method of the target transmission mode includes any one of the following: acquiring the target transmission mode indicated by the base station in the downlink control information DCI, acquiring the target transmission mode indicated by the base station in the multicast control channel MCCH, Obtain the target transmission mode indicated by the base station through the medium access control-control element MAC-CE, and obtain the target transmission mode through a preset timer.
The apparatus for switching a broadcast-multicast transmission mode according to claim 28, wherein the acquiring the target transmission mode indicated by the base station in the downlink control information DCI comprises:

receiving the first indication information sent by the base station through dedicated DCI signaling, wherein the first indication information includes the broadcast multicast service identification number and the identification information of the target transmission mode; or,

The second indication information sent by the base station through the DCI of broadcast multicast is received, wherein the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode.
The apparatus for switching a broadcast-multicast transmission mode according to claim 29, wherein when the broadcast-multicast services are at least two services configured based on a cell or a synchronization signal block (SSB) coverage area, the first The indication information is bitmap indication information, and each bit in the bitmap indication information corresponds to a target transmission mode of a broadcast multicast service.
The apparatus for switching a broadcast-multicast transmission mode according to claim 29, wherein when the broadcast-multicast service is at least two services configured based on a cell or a synchronization signal block (SSB) coverage area, and the dedicated DCI When the number of bits carried by the signaling is less than the configured total number of broadcast and multicast services, the first indication information includes at least two sets of bitmap indication information, and each set of bitmap indication information is used to indicate a broadcast group of the same transmission mode The target transmission mode of the broadcast service.
The apparatus for switching a broadcast-multicast transmission mode according to claim 29, wherein the mode in which the DCI of the broadcast-multicast includes the second indication information comprises:

An indication field is newly added to the DCI of the broadcast multicast, and the indication field includes the second indication information; or,

The meaning of the original target field in the DCI of the broadcast multicast is redefined as the second indication information.
The device for switching a broadcast-multicast transmission mode according to claim 32, wherein the target original field includes any one of the following:

DCI indication format, physical uplink control channel PUCCH power control parameters, HARQ process number, frequency domain resource allocation indication, and time domain resource allocation indication.
The apparatus for switching a broadcast-multicast transmission mode according to claim 28, wherein when the target transmission mode is the PTM mode, the DCI used to indicate the target transmission mode further includes carrier indication information.
The apparatus for switching a broadcast-multicast transmission mode according to claim 28, wherein the acquiring the target transmission mode indicated by the base station in the multicast control channel MCCH comprises:

Receiving third indication information periodically sent by the base station through the MCCH, wherein the third indication information includes the target transmission mode of the broadcast multicast service, the carrier or cell information for sending the broadcast multicast service, and the information of the carrier or cell that transmits the broadcast multicast service at least An SSB coverage area is the index number of the SSB when the broadcast multicast service is sent.
The apparatus for switching a broadcast-multicast transmission mode according to claim 28, wherein the acquiring the target transmission mode indicated by the base station through the medium access control-control element MAC-CE comprises:

The fourth indication information sent by the base station through the MAC-CE is received, wherein the fourth indication information includes a control resource set identification number and a transmission configuration indication TCI state identification number, wherein the TCI state identification number is associated with the SSB index number.
The apparatus for switching a broadcast-multicast transmission mode according to claim 28, wherein the acquiring the target transmission mode through a preset timer comprises:

When the terminal does not receive the DCI of the broadcast multicast within the timing period of the preset timer, the target transmission mode of the broadcast multicast service is determined to be another transmission mode other than the current transmission mode.
The apparatus for switching a broadcast-multicast transmission mode according to claim 28, wherein the acquiring the configuration information of the target transmission mode comprises:

Before acquiring the target transmission mode of the broadcast multicast service, receive the configuration information of the PTP mode and the configuration information of the PTM mode sent by the base station through high-layer signaling; or,

After acquiring the target transmission mode of the broadcast multicast service, receive the configuration information of the target transmission mode sent by the base station;

The configuration information includes the control channel detection timing corresponding to the transmission mode and/or the rate matching information of the physical downlink shared channel PDSCH.
The device for switching broadcast-multicast transmission mode according to claim 38, characterized in that:

The control channel detection timing is configured based on a single broadcast multicast service or based on a group of broadcast multicast services;

The rate matching information of the PDSCH corresponding to the PTM mode is configured based on a group of terminals.
The device for switching the broadcast multicast transmission mode according to claim 28, wherein the device further comprises a second receiving module and a generating module;

The second receiving module is configured to receive the random access channel RACH resource configured by the base station for establishing PTP when the target transmission mode is the PTP mode and the terminal is in an idle state; or,

The generating module is configured to generate a random number by the terminal when the target transmission mode is the PTP mode and the terminal is in an idle state, and perform a random access process when the random number is greater than a preset access factor.
The device for switching a broadcast-multicast transmission mode according to any one of claims 28 to 40, wherein the target transmission mode of the broadcast-multicast service is configured in units of a single SSB coverage area or a group of SSB coverage areas .
A switching device of a broadcast multicast transmission mode, applied to a base station, is characterized in that, comprising:

The sending module is configured to send the target transmission mode of the broadcast multicast service to the terminal, and send the configuration information of the target transmission mode to the terminal, so that the terminal can receive the target transmission mode based on the configuration information of the target transmission mode. the above-mentioned broadcast and multicast services; wherein,

The target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode;

The method of sending the target transmission mode of the broadcast multicast service to the terminal includes any one of the following: sending the target transmission mode to the terminal through the downlink control information DCI, and sending the target transmission mode to the terminal through the multicast control channel MCCH. The terminal sends the target transmission mode to the terminal through the medium access control-control unit MAC-CE.
The apparatus for switching a broadcast-multicast transmission mode according to claim 42, wherein the sending the target transmission mode to the terminal through downlink control information DCI comprises:

Send the first indication information through dedicated DCI signaling, wherein the first indication information includes the identification number of the broadcast multicast service and the identification information of the target transmission mode; or,

The second indication information is sent through the DCI of broadcast multicast, wherein the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode.
The apparatus for switching a broadcast-multicast transmission mode according to claim 43, wherein when the broadcast-multicast services are at least two services configured based on a cell or a synchronization signal block (SSB) coverage area, the first The indication information is bitmap indication information, and each bit in the bitmap indication information corresponds to a target transmission mode of a broadcast multicast service.
The apparatus for switching a broadcast-multicast transmission mode according to claim 43, wherein when the broadcast-multicast service is at least two services configured based on a cell or a synchronization signal block (SSB) coverage area, and the dedicated DCI When the number of bits carried by the signaling is less than the configured total number of broadcast and multicast services, the first indication information includes at least two sets of bitmap indication information, and each set of bitmap indication information is used to indicate a broadcast group of the same transmission mode The target transmission mode of the broadcast service.
The apparatus for switching a broadcast-multicast transmission mode according to claim 44, wherein the mode in which the DCI of the broadcast-multicast includes the second indication information comprises:

An indication field is newly added to the DCI of the broadcast multicast, and the indication field includes the second indication information; or,

The meaning of the original target field in the DCI of the broadcast multicast is redefined as the second indication information.
The device for switching a broadcast-multicast transmission mode according to claim 46, wherein the target original field includes any one of the following:

DCI indication format, physical uplink control channel PUCCH power control parameters, HARQ process number, frequency domain resource allocation indication, and time domain resource allocation indication.
The apparatus for switching a broadcast-multicast transmission mode according to claim 42, wherein when the target transmission mode is the PTM mode, the DCI used to indicate the target transmission mode further includes carrier indication information.
The apparatus for switching a broadcast-multicast transmission mode according to claim 42, wherein the sending the target transmission mode to the terminal through a multicast control channel MCCH comprises:

Third indication information periodically sent through the MCCH, wherein the third indication information includes the target transmission mode of the broadcast multicast service, carrier or cell information for sending the broadcast multicast service, and at least one SSB The coverage area is the index number of the SSB when the broadcast multicast service is sent.
The apparatus for switching a broadcast-multicast transmission mode according to claim 42, wherein the sending the target transmission mode to the terminal through the media access control-control unit MAC-CE comprises:

The fourth indication information is sent through the MAC-CE, wherein the fourth indication information includes a control resource set identification number and a transmission configuration indication TCI state identification number, wherein the TCI state identification number is associated with the SSB index number.
The device for switching a broadcast-multicast transmission mode according to claim 42, wherein the sending module comprises a first sending sub-module and a second sending sub-module;

The first sending submodule is configured to send the configuration information of the PTP mode and the configuration information of the PTM mode to the terminal through high-layer signaling before sending the target transmission mode of the broadcast multicast service to the terminal; or,

The second sending submodule is configured to send the configuration information of the target transmission mode to the terminal after sending the target transmission mode of the broadcast multicast service to the terminal;

The configuration information includes the control channel detection timing corresponding to the transmission mode and/or the rate matching information of the physical downlink shared channel PDSCH.
The device for switching a broadcast-multicast transmission mode according to claim 51, wherein:

The control channel detection timing is configured based on a single broadcast multicast service or based on a group of broadcast multicast services;

The rate matching information of the PDSCH corresponding to the PTM mode is configured based on a group of terminals.
The device for switching the broadcast-multicast transmission mode according to claim 42, wherein the device further comprises a configuration module;

The configuration module is configured to configure the random access channel RACH resource used by the terminal for establishing PTP when the target transmission mode is the PTP mode and the terminal is in an idle state.
The apparatus for switching a broadcast-multicast transmission mode according to any one of claims 42 to 53, wherein the target transmission mode of the broadcast-multicast service is configured in units of a single SSB coverage area or a group of SSB coverage areas .
A terminal, comprising a memory, a processor and a computer program stored on the memory and running on the processor, wherein the processor implements the following steps when executing the computer program:

acquiring the target transmission mode of the broadcast multicast service, and acquiring the configuration information of the target transmission mode;

Receive the broadcast multicast service based on the configuration information of the target transmission mode; wherein,

The target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode;

The acquisition method of the target transmission mode includes any one of the following: acquiring the target transmission mode indicated by the base station in the downlink control information DCI, acquiring the target transmission mode indicated by the base station in the multicast control channel MCCH, Obtain the target transmission mode indicated by the base station through the medium access control-control element MAC-CE, and obtain the target transmission mode through a preset timer.
The terminal according to claim 55, wherein the acquiring the target transmission mode indicated by the base station in the downlink control information DCI comprises:

receiving the first indication information sent by the base station through dedicated DCI signaling, wherein the first indication information includes the broadcast multicast service identification number and the identification information of the target transmission mode; or,

The second indication information sent by the base station through the DCI of broadcast multicast is received, wherein the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode.
The terminal according to claim 56, wherein when the broadcast and multicast services are at least two services configured based on a cell or a synchronization signal block (SSB) coverage area, the first indication information is bitmap indication information , and each bit in the bitmap indication information corresponds to a target transmission mode of a broadcast multicast service.
The terminal according to claim 56, wherein when the broadcast multicast services are at least two services configured based on a cell or a synchronization signal block (SSB) coverage area, and the number of bits borne by the dedicated DCI signaling is less than When the total number of broadcast multicast services is configured, the first indication information includes at least two sets of bitmap indication information, and each set of bitmap indication information is used to indicate the target transmission mode of the broadcast multicast service of the same transmission mode.
The terminal according to claim 56, wherein a manner in which the broadcast-multicast DCI includes the second indication information comprises:

An indication field is newly added to the DCI of the broadcast multicast, and the indication field includes the second indication information; or,

The meaning of the original target field in the DCI of the broadcast multicast is redefined as the second indication information.
The terminal according to claim 59, wherein the target original field includes any one of the following:

DCI indication format, physical uplink control channel PUCCH power control parameters, HARQ process number, frequency domain resource allocation indication, and time domain resource allocation indication.
The terminal according to claim 55, wherein when the target transmission mode is the PTM mode, the DCI used to indicate the target transmission mode further includes carrier indication information.
The terminal according to claim 55, wherein the acquiring the target transmission mode indicated by the base station in the multicast control channel MCCH comprises:

Receiving third indication information periodically sent by the base station through the MCCH, wherein the third indication information includes the target transmission mode of the broadcast multicast service, the carrier or cell information for sending the broadcast multicast service, and the information of the carrier or cell that transmits the broadcast multicast service at least An SSB coverage area is the index number of the SSB when the broadcast multicast service is sent.
The terminal according to claim 55, wherein the acquiring the target transmission mode indicated by the base station through the medium access control-control element MAC-CE comprises:

Receive fourth indication information sent by the base station through MAC-CE, wherein the fourth indication information includes a control resource set identification number and a transmission configuration indication TCI state identification number, wherein the TCI state identification number is associated with the SSB index number.
The terminal according to claim 59, wherein the acquiring the target transmission mode through a preset timer comprises:

When the terminal does not receive the DCI of the broadcast multicast within the timing period of the preset timer, the target transmission mode of the broadcast multicast service is determined to be another transmission mode other than the current transmission mode.
The terminal according to claim 55, wherein the acquiring the configuration information of the target transmission mode comprises:

Before acquiring the target transmission mode of the broadcast multicast service, receive the configuration information of the PTP mode and the configuration information of the PTM mode sent by the base station through high-layer signaling; or,

After acquiring the target transmission mode of the broadcast multicast service, receive the configuration information of the target transmission mode sent by the base station;

The configuration information includes the control channel detection timing corresponding to the transmission mode and/or the rate matching information of the physical downlink shared channel PDSCH.
The terminal according to claim 65, wherein the control channel detection timing is configured based on a single broadcast multicast service or configured based on a group of broadcast multicast services;

The rate matching information of the PDSCH corresponding to the PTM mode is configured based on a group of terminals.
The terminal according to claim 55, wherein the step further comprises:

When the target transmission mode is the PTP mode and the terminal is in an idle state, receive the random access channel RACH resource configured by the base station for establishing PTP; or,

When the target transmission mode is the PTP mode and the terminal is in an idle state, the terminal generates a random number, and performs a random access process when the random number is greater than a preset access factor.
The terminal according to any one of claims 55 to 67, wherein the target transmission mode of the broadcast multicast service is configured in units of a single SSB coverage area or a group of SSB coverage areas.
A base station, comprising a memory, a processor and a computer program stored on the memory and running on the processor, wherein the processor implements the following steps when executing the computer program:

Send the target transmission mode of the broadcast multicast service to the terminal, and send the configuration information of the target transmission mode to the terminal, so that the terminal can receive the broadcast multicast service based on the configuration information of the target transmission mode ;in,

The target transmission mode is a point-to-point PTP mode or a point-to-multipoint PTM mode;

The method of sending the target transmission mode of the broadcast multicast service to the terminal includes any one of the following: sending the target transmission mode to the terminal through the downlink control information DCI, and sending the target transmission mode to the terminal through the multicast control channel MCCH. The terminal sends the target transmission mode to the terminal through the medium access control-control unit MAC-CE.
The base station according to claim 69, wherein the sending the target transmission mode to the terminal through downlink control information DCI comprises:

Send the first indication information through dedicated DCI signaling, wherein the first indication information includes the identification number of the broadcast multicast service and the identification information of the target transmission mode; or,

The second indication information is sent through the DCI of broadcast multicast, wherein the second indication information is used to indicate that the transmission mode of the broadcast multicast service is switched from the current transmission mode to the target transmission mode.
The base station according to claim 70, wherein when the broadcast and multicast services are at least two services configured based on a cell or a synchronization signal block (SSB) coverage area, the first indication information is bitmap indication information , and each bit in the bitmap indication information corresponds to a target transmission mode of a broadcast multicast service.
The base station according to claim 70, wherein when the broadcast multicast services are at least two services configured based on a cell or a synchronization signal block (SSB) coverage area, and the number of bits borne by the dedicated DCI signaling is less than When the total number of broadcast multicast services is configured, the first indication information includes at least two sets of bitmap indication information, and each set of bitmap indication information is used to indicate the target transmission mode of the broadcast multicast service of the same transmission mode.
The base station according to claim 70, wherein a manner in which the DCI of the broadcast multicast includes the second indication information comprises:

An indication field is newly added to the DCI of the broadcast multicast, and the indication field includes the second indication information; or,

The meaning of the original target field in the DCI of the broadcast multicast is redefined as the second indication information.
The base station according to claim 73, wherein the target original field includes any one of the following:

DCI indication format, physical uplink control channel PUCCH power control parameters, HARQ process number, frequency domain resource allocation indication, and time domain resource allocation indication.
The base station according to claim 69, wherein when the target transmission mode is a PTM mode, the DCI used to indicate the target transmission mode further includes carrier indication information.
The base station according to claim 69, wherein the sending the target transmission mode to the terminal through a multicast control channel MCCH comprises:

Third indication information periodically sent through the MCCH, wherein the third indication information includes the target transmission mode of the broadcast multicast service, carrier or cell information for sending the broadcast multicast service, and at least one SSB The coverage area is the index number of the SSB when the broadcast multicast service is sent.
The base station according to claim 69, wherein the sending the target transmission mode to the terminal through a medium access control-control element (MAC-CE) comprises:

The fourth indication information is sent through the MAC-CE, wherein the fourth indication information includes a control resource set identification number and a transmission configuration indication TCI state identification number, wherein the TCI state identification number is associated with the SSB index number.
The base station according to claim 69, wherein the sending the configuration information of the target transmission mode to the terminal comprises:

Before sending the target transmission mode of the broadcast multicast service to the terminal, send the configuration information of the PTP mode and the configuration information of the PTM mode to the terminal through high-layer signaling; or,

After sending the target transmission mode of the broadcast multicast service to the terminal, send the configuration information of the target transmission mode to the terminal;

The configuration information includes the control channel detection timing corresponding to the transmission mode and/or the rate matching information of the physical downlink shared channel PDSCH.
The base station according to claim 78, wherein the control channel detection timing is configured based on a single broadcast multicast service or configured based on a group of broadcast multicast services;

The rate matching information of the PDSCH corresponding to the PTM mode is configured based on a group of terminals.
The base station according to claim 69, wherein the step further comprises:

When the target transmission mode is the PTP mode and the terminal is in an idle state, configure the random access channel RACH resource used by the terminal to establish the PTP.
The base station according to any one of claims 69 to 80, wherein the target transmission mode of the broadcast multicast service is configured in units of a single SSB coverage area or a group of SSB coverage areas.
A non-transitory computer-readable storage medium on which a computer program is stored, characterized in that, when the computer program is executed by a processor, switching of the broadcast-multicast transmission mode according to any one of claims 1 to 14 is realized The steps of the method or the steps of executing the method for switching the broadcast multicast transmission mode according to any one of claims 15 to 27.