CN113556688B

CN113556688B - Method, terminal and base station for receiving broadcast multicast service data

Info

Publication number: CN113556688B
Application number: CN202010328481.4A
Authority: CN
Inventors: 王俊伟; 赵锐
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2022-09-13
Anticipated expiration: 2040-04-23
Also published as: CN113556688A

Abstract

The embodiment of the invention provides a method, a terminal and a base station for receiving broadcast multicast service data, wherein the method comprises the following steps: detecting a first PDCCH of a broadcast multicast on a monitoring occasion of a first SSB, wherein the first DCI transmitted by the first PDCCH contains scheduling indication information of a second SSB, and the scheduling indication information comprises detection indication information of the second PDCCH used for indicating whether a terminal detects the broadcast multicast on the monitoring occasion of the second SSB, or the scheduling indication information comprises transmission indication information used for indicating whether the second SSB sends a PDSCH and/or PDSCH scheduling information of the second SSB; determining whether to detect the second PDCCH or receive the PDSCH of the second SSB on the monitoring occasion of the second SSB based on the scheduling indication information. The embodiment of the invention improves the receiving accuracy of the terminal on the broadcast multicast data.

Description

Method, terminal and base station for receiving broadcast multicast service data

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, a terminal, and a base station for receiving broadcast multicast service data.

Background

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

In the current 5G, a base station sends two data types, one is terminal-oriented data, which can only be received by a target terminal, and the data becomes unicast data; another is data for all terminals in the cell, and unicast data can be sent only after all terminals receive the data, where typical data includes: the system broadcasts the data. The system broadcast data is the configuration information of the cell, and the terminal can receive the information after completing the cell search.

In order to support wireless communication in a higher frequency band, in the current 5G System design, an area covered by one base station is divided into a plurality of areas, and each area is divided into a plurality of System Synchronization Block (SSB) coverage areas. For the system broadcast message, each area transmits the system broadcast message with the same content once, and in order to ensure the coverage continuity of the system broadcast message, the coverage areas of the SSBs are continuous.

When the 5G needs to support the broadcast multicast service data, the transmission of the broadcast multicast service data is also based on the SSB coverage area, that is, it is possible to transmit one piece of broadcast multicast data in each SSB coverage area. At this time, when the terminal receives the broadcast multicast service data, how to effectively receive the broadcast multicast service data to increase the receiving accuracy needs to be solved.

Disclosure of Invention

The embodiment of the invention provides a method, a terminal and a base station for receiving broadcast multicast service data, which are used for increasing the receiving accuracy of the broadcast multicast service data by the terminal.

The embodiment of the invention provides a method for receiving broadcast multicast service data, which is applied to a terminal and comprises the following steps:

detecting a first Physical Downlink Control Channel (PDCCH) of a broadcast multicast on a monitoring opportunity of a first System Synchronization Block (SSB), wherein a first Downlink Control Information (DCI) transmitted by the first PDCCH contains scheduling indication information of a second SSB, and the scheduling indication information comprises detection indication information of the second PDCCH used for indicating whether a terminal detects the broadcast multicast on the monitoring opportunity of the second SSB, or the scheduling indication information comprises transmission indication information used for indicating whether the second SSB sends a Physical Downlink Shared Channel (PDSCH) and/or PDSCH scheduling information of the second SSB;

determining whether to detect the second PDCCH or receive the PDSCH of the second SSB on the monitoring occasion of the second SSB based on the scheduling indication information.

The embodiment of the invention provides a method for receiving broadcast multicast service data, which is applied to a base station and comprises the following steps:

the method comprises the steps of broadcasting and multicasting a first Physical Downlink Control Channel (PDCCH), wherein a first Downlink Control Information (DCI) in the first PDCCH comprises scheduling indication information of a second single cell shift indicator (SSB), and the scheduling indication information comprises detection indication information of the second PDCCH used for indicating whether a terminal detects the broadcasting and multicasting on monitoring occasions of the second SSB, or the scheduling indication information comprises transmission indication information used for indicating whether the second SSB sends a Physical Downlink Shared Channel (PDSCH) and/or PDSCH scheduling information of the second SSB, so that the terminal determines whether to detect the second PDCCH or receive the PDSCH of the second SSB on the monitoring occasions of the second SSB based on the scheduling indication information.

The embodiment of the invention provides a receiving device of broadcast multicast service data, which is applied to a terminal and comprises the following components:

a detection module, configured to detect a first Physical Downlink Control Channel (PDCCH) for broadcast multicast on a monitoring occasion of a first System Synchronization Block (SSB), where a first Downlink Control Information (DCI) transmitted by the first PDCCH includes scheduling indication information of a second SSB, where the scheduling indication information includes detection indication information of the second PDCCH for indicating whether a terminal detects the broadcast multicast on the monitoring occasion of the second SSB, or the scheduling indication information includes transmission indication information for indicating whether the second SSB transmits a Physical Downlink Shared Channel (PDSCH) and/or PDSCH scheduling information of the second SSB;

a determining module, configured to determine whether to detect the second PDCCH or receive the PDSCH of the second SSB on the monitoring occasion of the second SSB based on the scheduling indication information.

The embodiment of the invention provides a receiving device of broadcast multicast service data, which is applied to a base station and comprises the following components:

a broadcast module, configured to broadcast and multicast a first physical downlink control channel PDCCH, where a first downlink control information DCI in the first PDCCH includes scheduling indication information of a second SSB, where the scheduling indication information includes detection indication information used to indicate whether a terminal detects the second PDCCH of the broadcast and multicast on a monitoring occasion of the second SSB, or the scheduling indication information includes transmission indication information used to indicate whether the second SSB sends a physical downlink shared channel PDSCH and/or PDSCH scheduling information of the second SSB, so that the terminal determines whether to detect the second PDCCH on the monitoring occasion of the second SSB or receive the PDSCH of the second SSB based on the scheduling indication information.

An embodiment of the present invention provides a terminal, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method applied to the terminal when executing the program.

An embodiment of the present invention provides a base station, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method applied to the base station when executing the program.

An embodiment of the present invention provides a non-transitory computer readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method for receiving broadcast multicast service data.

According to the method, the terminal and the base station for receiving the broadcast multicast service data, provided by the embodiment of the invention, the first PDCCH of the broadcast multicast is detected at the monitoring opportunity of the first SSB, and the first DCI transmitted by the first PDCCH contains the scheduling indication information of the second SSB, so that the terminal can determine whether to detect the second PDCCH or receive the PDSCH of the second SSB at the monitoring opportunity of the second SSB based on the scheduling indication information, thereby realizing that the terminal can receive the broadcast multicast PDSCH data of the SSB and the adjacent SSB, improving the receiving performance of the terminal and saving air interface resources.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a flowchart illustrating steps of a method for receiving broadcast multicast service data applied to a terminal according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating an association between a monitoring opportunity for a second PDCCH detection and a detection opportunity for a first PDCCH in an embodiment of the present invention;

FIG. 3 is a diagram illustrating a terminal performing PDCCH detection in an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating implicit indication of time domain information according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating steps of a method for receiving broadcast multicast service data applied to a base station according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of indication detection of neighboring SSBs in an embodiment of the invention;

fig. 7 is a flowchart illustrating steps of a receiving apparatus for receiving broadcast multicast service data applied to a terminal according to an embodiment of the present invention;

fig. 8 is a flowchart illustrating steps of a receiving apparatus for receiving broadcast multicast service data applied to a base station according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a terminal in an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a base station in an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

For the convenience of clearly describing the technical solutions of the embodiments of the present invention, in each embodiment of the present invention, if words such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions and actions, those skilled in the art can understand that the words such as "first" and "second" do not limit the quantity and execution order.

The term "and/or" in the embodiments of the present invention describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "three types" generally indicates that the former and latter associated objects are in an "or" relationship.

The term "plurality" in the embodiments of the present invention means two or more, and other terms are similar thereto.

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

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

Specifically, when the system broadcast message is sent based on the SSB coverage areas, the system broadcast message sent corresponding to each SSB coverage area is time-divided between the SSB coverage areas, that is, sent at different times. For example, assuming that a cell includes 4 SSB coverage areas, there are 2 candidate times for each SSB to transmit a scheduling system broadcast message, and a broadcast information monitoring time window includes 8 monitoring occasions, there are 2 monitoring occasions for each SSB coverage area, and at this time, in order to make scheduling flexibility of a base station, when broadcast information corresponding to each SSB coverage area is transmitted, it is only necessary to transmit scheduling information of the broadcast information to a terminal at one of the monitoring occasions. The scheduling information transmitted at the monitoring time is used to instruct the base station to transmit Physical Downlink Shared Channel (PDSCH) scheduling information corresponding to the broadcast information in the SSB coverage area, and includes time domain and frequency domain positions of the PDSCH, modulation and coding format, redundancy version, and the like.

The broadcast multicast service is an important multimedia service which needs to be supported by 5G, and comprises streaming media, such as audio broadcast, television live broadcast and the like, from the aspect of service types; from a data type perspective, including data files as used for software upgrades; from the public safety category, information such as earthquake, tsunami, or public health safety is included. Different services correspond to different time delay requirements and data rates have different values, so compared with system broadcast information, the system broadcast information has the characteristics of different service quality requirements, different rates and the like, and particularly, the television live broadcast service needs higher service rate and transmission quality requirements. In addition, in terms of transmission, the transmission of broadcast multicast grandma includes two modes: point-to-multipoint (PTM) mode and point-to-point (PTP) mode; wherein, the PTM mode refers to that the base station establishes a radio bearer, performs unicast transmission, and simultaneously receives a plurality of terminals, and the PTM mode is suitable for a plurality of terminals (for example, more than 10 terminals) to receive the broadcast multicast service data; the PTP mode is a mode in which the base station establishes a radio bearer for each terminal, and the PTP mode is suitable for a small number of users to receive broadcast multicast service data.

In addition, Downlink Control Information (DCI) carried on a Physical Downlink Control Channel (PDCCH) includes a time domain Information indication of the PDSCH, which is used to indicate time scheduling Information of the PDSCH, and mainly includes 3 Information contents: a slot offset k0 relative to the slot in which the PDCCH is located, indicating that the PDCCH is in one slot when k0 is 0; the starting symbol (S) of PDSCH, i.e., the number of symbols from the slot boundary; the length (L) of the PDSCH, i.e., the number of symbols of the scheduled PDSCH. In addition, the information transmitted by the DCI includes common control information (system information, etc.) and user-specific control information (downlink resource allocation indication, uplink resource scheduling, trigger PRACH, uplink power control parameters, etc.).

In addition, for convenience of describing the PDCCH, a New Radio (NR) introduces a control resource set (CORESET) concept for characterizing the size of a PDCCH channel resource block. One CORESET is composed of a plurality of control-channel elements (CCEs), each CCE is composed of 6 Resource Element Groups (REGs), each REG includes a Resource Block (RB) in a frequency domain, and one OFDM symbol in a time domain. In addition, in a CORESET, including a plurality of candidate PDCCHs whose control channels require detection by the terminal, generally, any one or more CCEs may form a candidate PDCCH, and when a PDCCH consists of 1 CCE, it is called a PDCCH candidate with CCE aggregation level 1, and when a PDCCH consists of 2 CCEs, it is called a PDCCH candidate with CCE aggregation level 2, and when a PDCCH consists of 4 CCEs, it is called a PDCCH candidate with CCE aggregation level 4, and so on, the supported CCE aggregation levels are 1, 2, 4, 8, 16 as specified by the protocol. In a CORESET, there are a plurality of PDCCH candidates of the same CCE aggregation level, for example, 0, 1, 2,3,4, 5, 6, 8. In addition, there are 4 PDCCH candidates when the CCE aggregation level is 4, 2PDCCH candidates when the CCE aggregation level is 8, and 1PDCCH candidate when the CCE aggregation level is 16, that is, a total of 4+2+1 to 7 PDCCH candidates are required to be detected by the terminal.

When the broadcast multicast service data is sent in the PTM mode, if the broadcast multicast service data is sent in the manner of broadcast message of the existing sending system, that is, each SSB coverage area sends the broadcast multicast service separately, the terminal only receives the broadcast multicast service sent by the SSB coverage area, and in order to increase the accuracy of receiving by the terminal, besides receiving the broadcast multicast service data of the SSB coverage area, it is necessary to receive the broadcast multicast service data of other SSB coverage areas, and how to effectively receive the broadcast multicast service data at this time is a problem that needs to be solved, and there are following disadvantages: 1) due to the adoption of the mode of PTM for transmission, when the rate of the broadcast multicast service data is higher, more wireless air interface resources need to be occupied, and particularly, in consideration of meeting the receiving performance of all terminals under coverage, a base station needs to adopt lower coding efficiency; when the coverage area of the SSB is more, the required wireless resources are doubled again; 2) because the terminal does not know the synchronization relationship between the broadcast multicast service sent by other SSB coverage areas and the broadcast multicast service data sent under the SSB coverage area, the terminal cannot receive and combine the data sent by the adjacent SSB coverage areas.

As shown in fig. 1, it is a flowchart of steps of a method for receiving broadcast multicast service data applied to a terminal in an embodiment of the present invention, where the method includes the following steps:

step 101: and detecting a first PDCCH of the broadcast multicast on the monitoring opportunity of the first SSB, wherein the first DCI transmitted by the first PDCCH comprises scheduling indication information of the second SSB.

Specifically, the scheduling indication information includes detection indication information for indicating whether the terminal detects the second PDCCH of the broadcast multicast on the monitoring occasion of the second SSB, or the scheduling indication information includes transmission indication information for indicating whether the second SSB transmits the PDSCH and/or PDSCH scheduling information of the second SSB.

Specifically, the monitoring timing is timing for detecting a control channel at a terminal side, and is intended to match with real-time scheduling of a service and also meet the requirement of power saving; the base station can configure different monitoring occasions according to the service characteristics. In addition, the terminal side only detects the service control channel at the configured monitoring opportunity, and when the control channel is detected, the terminal analyzes the content of the control channel, namely DCI, and receives and demodulates/decodes the service channel (PDSCH) of the broadcast multicast according to the service scheduling information in the DCI.

In addition, specifically, the first SSB may be an SSB in which the terminal resides, and the second SSB is an adjacent SSB of the first SSB.

The number of the second SSBs may be two, and when the number of SSBs actually transmitted by the base station is smaller than a certain threshold value, for example, 4, all the SSBs are considered to be adjacent, that is, the second SSB is the remaining SSBs of all the SSBs except the first SSB.

In addition, specifically, the scheduling indication information includes detection indication information for indicating whether the terminal detects the second PDCCH of the broadcast multicast at the monitoring timing of the second SSB, so that the terminal can determine whether the second PDCCH of the second SSB broadcast multicast needs to be detected through the detection indication information, thereby enabling the terminal to detect and obtain control channels of multiple coverage areas of the first SSB and the second SSB, and thus implementing reception of broadcast multicast service data (i.e., PDSCH) sent by the first SSB and broadcast multicast service data sent by the second SSB based on the detected first PDCCH of the first SSB and the detected second PDCCH of the second SSB, and increasing the accuracy of the terminal in receiving the broadcast multicast service.

In addition, specifically, the scheduling indication information includes transmission indication information for indicating whether the second SSB transmits the PDSCH and/or PDSCH scheduling information of the second SSB, so that the terminal can directly receive the PDSCH of the second SSB broadcast multicast based on the transmission indication information and/or PDSCH scheduling information of the second SSB without performing second PDCCH detection of the second SSB, and the accuracy of receiving broadcast multicast services by the terminal is also increased.

Step 102: determining whether to detect the second PDCCH or receive the PDSCH of the second SSB on the monitoring occasion of the second SSB based on the scheduling indication information.

In this step, specifically, when the scheduling indication information includes detection indication information of the second PDCCH, the terminal may determine whether to detect the second PDCCH at the monitoring timing of the second SSB based on the detection indication information of the second PDCCH and then receive the PDSCH; when the scheduling indication information includes the transmission indication information and/or the PDSCH scheduling information of the second SSB, the terminal may determine whether to receive the PDSCH of the second SSB and how to receive the PDSCH based on the transmission indication information and/or the PDSCH scheduling information of the second SSB directly.

In this way, in this embodiment, the first PDCCH of the broadcast multicast is detected at the monitoring time of the first SSB, and the first DCI transmitted by the first PDCCH includes the scheduling indication information of the second SSB, so that the terminal can determine whether to detect the second PDCCH or receive the PDSCH of the second SSB at the monitoring time of the second SSB based on the scheduling indication information, thereby enabling the terminal to receive the broadcast multicast PDSCH data of the SSB and the neighboring SSBs, improving the receiving performance of the terminal, and saving air interface resources.

It should be noted that the detection indication information includes K bits, where K is the number of the second SSBs, and for each bit, when the value of the bit is a first preset value, the terminal is instructed to detect the second PDCCH of the broadcast multicast at the monitoring timing corresponding to the second SSB, and when the value of the bit is a second preset value, the terminal is instructed not to detect the second PDCCH of the broadcast multicast at the monitoring timing corresponding to the second SSB.

For example, if the number of the second SSBs is 2, the detection indication information includes 2 bits. In addition, the first preset value may be 1, that is, when the indication bit is 1, it indicates that the terminal detects the corresponding second PDCCH on the monitoring occasion of the corresponding second SSB; the second preset value is 0, that is, when the indication bit is 0, it indicates that the terminal does not need to detect the corresponding second PDCCH at the monitoring occasion of the corresponding second SSB. In addition, in this embodiment, before the terminal detects the first PDCCH of the broadcast multicast at the monitoring timing of the first SSB, the method further includes the following steps:

receiving a multicast control channel (MCCH for short) or a broadcast control channel (BCCH for short) sent by a base station, wherein the MCCH or the BCCH carries monitoring opportunities of a plurality of SSBs, and calculating the monitoring opportunities of each SSB in a preset calculation mode according to the monitoring opportunities of the plurality of SSBs, wherein the plurality of SSBs comprise a first SSB and a second SSB; or, the MCCH or BCCH carries monitoring opportunity configuration information of the first SSB and the second SSB, where the monitoring opportunity configuration information includes an SSB index value, a broadcast multicast detection period, and a time slot in which the first SSB and the second SSB are located in the broadcast multicast detection period; or receiving a dedicated signaling sent by the base station, wherein the dedicated signaling contains monitoring opportunity configuration information of the first SSB and the second SSB.

The terminal further needs to receive indication information sent by the base station for indicating the second SSB corresponding to each first SSB in the serving cell.

Specifically, the base station may configure a monitoring time for the broadcast multicast service in each cell, and configure a monitoring time corresponding to each SSB in the cell. In this case, the monitoring timing of the SSB may be indicated implicitly or explicitly.

At this time, during the implicit indication, the MCCH or BCCH sent by the base station may carry the monitoring occasions of the multiple SSBs in the serving cell configured by the base station, and the terminal may calculate the monitoring occasion of each SSB according to a preset calculation manner. Specifically, when the terminal calculates the monitoring time of each SSB according to the monitoring times of the plurality of SSBs by using a preset calculation formula, the monitoring time of each SSB may be calculated by using the following formula:

SSB _n ＝{n×N/M，n×N/M+1......n×N/M+(N/M-1)}；

wherein, SSB _n The number of the monitoring occasions of the SSBs with the index number N is represented, N represents the total number of the monitoring occasions of all the SSBs in the serving cell configured by the base station, and M represents the number of all the SSBs coverage areas in the serving cell or the number of the SSBs sent by the base station.

For example, assuming that the coverage area M of the SSBs supported by the serving cell is 4, the index numbers are 0, 1, 2, and 3, respectively, and the total number N of the monitoring occasions of the SSBs configured by the base station is 8, the monitoring occasions corresponding to the SSBs with the index number of 0 are {0, 1}, the monitoring occasions corresponding to the SSBs with the index number of 1 are {2, 3}, and so on, the monitoring occasions corresponding to all the SSBs are obtained.

In addition, when the explicit indication is given, the MCCH may carry monitoring opportunity configuration information of the first SSB and the second SSB, where the monitoring opportunity configuration information includes a broadcast multicast service identifier, a cell identifier, an SSB index value, a broadcast multicast detection period, and a time slot in which the first SSB and the second SSB are located in the broadcast multicast detection period. Specifically, the terminal can receive the broadcast multicast service data sent by the coverage area of the SSB of the service cell and the broadcast multicast service data sent by the coverage area of the SSB of other cells through the cell identification number; the broadcast multicast service identification number is used for indicating the identification number of the service of the broadcast multicast service data, and when the terminal is not interested in the service, the monitoring occasions can be skipped, namely the detection of the PDCCH is not carried out.

In addition, the base station may also configure the monitoring opportunity configuration information of the first SSB and the second SSB sent by the MCCH or BCCH through dedicated signaling, which has the advantage that when there are fewer terminal users under the coverage of the SSB in the cell, the performance may be improved through dedicated signaling configuration.

In addition, the terminal needs to receive indication information sent by the base station for indicating configuration information of the second SSB corresponding to each first SSB in the serving cell.

Specifically, the second SSB may be an adjacent SSB to the first SSB. In this way, the terminal receives the configuration information of the second SSB, so that the terminal can know that the broadcast multicast service data transmitted by the adjacent SSB can be received.

In addition, the indication information for indicating the second SSB corresponding to each first SSB in the serving cell may be bitmap information. For example, assuming that the number M of SSBs actually transmitted by the base station is 4, each SSB may configure K (K ═ 2) neighboring SSBs, and the sequence of SSBs represented by the bitmap is { SSB-0, SSB-1, SSB-2, SSB-3}, where 0-3 represent the index number of the SSB. The bitmap for each SSB may be as follows:

the above bitmap indicates that the SSBs adjacent to SSB-0 are SSB-1 and SSB-3, the SSB adjacent to SSB-1 is SSB0SSB-2, and so on. It should be noted that, the adjacency in this embodiment indicates that the terminal can receive PDSCH data sent by the SSB coverage area, so as to improve the receiving performance of the broadcast multicast service; the geographic locations may or may not be adjacent, and are not limited herein. If the base station and the terminal agree that all SSBs sent in the cell are adjacent, or if the number of actually sent SSBs is smaller than a certain threshold value (e.g., L <4), it is considered that all the SSBs sent are adjacent, and the configuration information of the second SSB may not be indicated.

In this way, the terminal can determine which SSBs are the second SSBs and determine the monitoring timing of the second SSBs by acquiring the monitoring timing of the first SSBs and the second SSBs and the indication information indicating which SSBs are the second SSBs, so that the terminal can perform control channel detection and PDSCH data reception on the monitoring timing of the second SSBs, thereby improving the reception performance of the broadcast multicast service.

Further, in this embodiment, in order to more reliably receive the broadcast multicast service data of the second SSB, other DCI contents may be further enhanced, where the following enhancement modes are included:

the first DCI and the second DCI transmitted by the second PDCCH both contain a process number of hybrid automatic repeat request (HARQ) and a New Data Indication (NDI); and when the HARQ process number in the first DCI is the same as the HARQ process number in the second DCI and when the NDI value in the first DCI is the same as the NDI value in the second DCI, indicating the terminal to receive the PDSCH of the second SSB.

Of course, if the HARQ process number in the first DCI is different from the HARQ process number in the second DCI, or the NDI value in the first DCI is different from the NDI value in the second DCI, the terminal is instructed not to receive the PDSCH of the second SSB.

In addition, if the second DCI transmitted by the second PDCCH includes the third SSB scheduling indication information, the terminal autonomously determines whether to detect the third PDCCH of the third SSB broadcast multicast. The basis for the terminal determination may be: according to the configured SSB adjacency relation, such as: and when the third SSB and the first SSB are in an adjacent relation, the terminal detects a third PDCCH of the third SSB broadcast multicast, otherwise, the terminal does not detect. The indication overhead of DCI indicating neighboring SSBs may be reduced, determined according to the neighboring relationship. The terminal may further perform, according to the signal strength of the third SSB, if the signal strength of the third SSB measured by the terminal is higher than a certain threshold (the threshold may be configured by the base station), detection of the third PDCCH of the third SSB broadcast multicast, otherwise, the detection is not performed.

In addition, further, the embodiment may further constrain the position of the monitoring opportunity of the second SSB, so that the terminal is simpler to detect. In this case, the first DCI further includes any one or a combination of the following pieces of indication information:

first, the location indicating the monitoring opportunity of the second SSB is located after or no earlier than the monitoring opportunity of the first SSB.

For example, when there are multiple monitoring occasions (e.g., 2) of the SSBs within one time window, the monitoring occasion of the second SSB may be indicated in the first DCI, or the monitoring occasion of the second PDCCH of the second SSB is associated with the monitoring occasion of the first PDCCH of the first SSB, e.g., the monitoring occasion of the second PDCCH of the second SSB is the same as the monitoring occasion of the first PDCCH of the first SSB.

And secondly, when the number of the monitoring occasions of the second SSB is at least two, instructing the terminal to perform a target monitoring occasion for second PDCCH detection, where the target monitoring occasion is one or more of the at least two monitoring occasions of the second SSB.

Specifically, assuming that there are multiple monitoring occasions for the second SSB in one broadcast multicast monitoring window, the first DCI instructs the terminal to detect which monitoring occasion the second PDCCH of the second SSB is on, or instructs to perform PDCCH detection on all monitoring occasions of the second SSB.

And thirdly, indicating the association relationship between the monitoring opportunity of the terminal for detecting the second PDCCH and the monitoring opportunity of the first SSB for detecting the first PDCCH.

Specifically, as shown in fig. 2, assuming that the terminal resides on the SSB with index number 1 (i.e., SSB-1), if the terminal detects the first PDCCH at the PDCCH monitoring occasion (1) of SSB-1 and the first DCI thereof instructs the terminal to perform the second PDCCH detection at the monitoring occasion of the second SSB (SSB-2), the monitoring occasion that the terminal performs the second PDCCH detection may be the same as the monitoring occasion that the first SSB detects the first PDCCH, i.e., the terminal performs the second PDCCH detection at the monitoring occasion (1) of SSB-2.

And fourthly, indicating the association relationship between the parameters of the second PDCCH and the parameters of the first PDCCH.

Specifically, in order to reduce the complexity of detecting the second SSB control channel by the terminal, the parameters when the second SSB sends the broadcast multicast control information may be limited, and at this time, the association relationship between the parameters of the second PDCCH and the parameters of the first PDCCH may be indicated, where the association relationship may be that the parameters between the two are all the same or partially the same.

That is, the association relationship between the parameters of the second PDCCH and the parameters of the first PDCCH may be: the CCE of the second PDCCH is the same as the CCE aggregation level of the first PDCCH; and/or the CCE starting position of the second PDCCH is the same as that of the first PDCCH.

For example, as shown in fig. 3, when it is indicated that the aggregation levels remain the same, the terminal monitors that the CCE aggregation level of the PDCCH of the DCI is 8 at the monitoring timing of the first SSB (SSB-1), and when the terminal performs PDCCH detection at the monitoring timing of the second SSB (SSB-2), the terminal may perform detection only according to the CCE aggregation level of 8, that is, only 2 PDCCHs with an aggregation level of 8 need to be detected, and other aggregation levels do not detect.

In addition, in this embodiment, when the first DCI only includes the transmission indication information, the second DCI transmitted by the second PDCCH is indicated to be the same as the first DCI, and the starting position of the slot offset value of the PDSCH of the second DCI is referred to the monitoring timing position of the second SSB. In this way, when the first DCI only includes the transmission instruction information, the terminal is enabled to receive the PDSCH of the second SSB according to the fact that the second DCI transmitted by the second PDCCH agreed by the base station and the terminal in advance is the same as the first DCI, and the starting position of the slot offset value of the PDSCH of the second DCI is referenced to the monitoring timing position of the second SSB.

Specifically, the transmission indication information may include K bits, where K is the number of the second SSBs, and may indicate the second SSBs to transmit the PDSCH when the bit array is 1, and indicate the second SSBs not to transmit the PDSCH when the bit number is 0.

It should be noted that, in the present embodiment, the first DCI only includes the transmission instruction information is not for the original information in the first DCI, as long as the PDSCH scheduling information is not included any more.

In addition, the PDSCH scheduling information may include K times Y bits, where K is the number of the second SSBs and Y is the number of bits included in all scheduling fields in the PDSCH.

Specifically, the scheduling field of the existing PDSCH includes: a frequency domain resource allocation indication field, which is L bits, is used for indicating the bandwidth and position of the frequency domain of the scheduled PDSCH, and the occupied bit width is related to the maximum schedulable bandwidth; a time domain resource allocation indicator, which is 4 bits and is used to indicate an indication of a time domain for scheduling the PDSCH, in this embodiment, to reduce the kind of the time domain allocation indicator, a reference position of the time domain indication is a monitoring opportunity position of the second SSB; a modulation coding format (MCS), which is 5 bits, for indicating a modulation order and a channel coding rate adopted by the PDSCH; redundancy coding version (RV), which is 2 bits, indexes the redundancy version number of data transmission for channel decoding and demodulation. I.e. when the value of Y is equal to L +4+5+ 2.

In this embodiment, when only the transmission instruction information is included in the first DCI, the first DCI further includes any one or a combination of the following:

firstly, acquiring an association relationship between the RV value of the PDSCH of the second SSB and the RV value of the PDSCH of the first SSB predefined by a protocol, or receiving a high-level signaling sent by the base station, where the high-level signaling carries the association relationship between the RV value of the PDSCH of the second SSB and the RV value of the PDSCH of the first SSB.

I.e., the RV value of the PDSCH of the second SSB may be implicitly or explicitly indicated. When implicitly indicated, it can be indicated that the correlation between the two is the same as the RV value; in addition, the relationship between the RV values of the PDSCH of each SSB configured by the higher layer signaling can be shown in the following table:

in the above table, it is assumed that the actually transmitted SSBs of the cell are 4 in total, and the RV value is 4 {0, 1, 2,3 }. When the terminal detects that the RV version indication in the DCI corresponding to the SSB-0 is 0, the RV versions corresponding to the SSB-1, SSB-2 and SSB-3 are respectively 3, 2 and 1.

Similarly, when the terminal detects that the RV version indication in the DCI corresponding to SSB-2 is 1, the

RV versions

3, 2, 0 corresponding to SSB-0, SSB-1, SSB-3. And so on for other cases.

Of course, the relationship between the RV value of the PDSCH of the second SSB and the RV value of the PDSCH of the first SSB may be configured as other relationships, as shown in the following table:

associative index	SSB-0	SSB-1	SSB-2	SSB-3
					0	0	3	3	0
1	3	0	0	3

Secondly, acquiring the association relation between the MCS of the PDSCH of the second SSB and the MCS of the PDSCH of the first SSB, which is predefined by the protocol.

That is, the MCS may be implicitly indicated, and the association relationship between the two may be configured to be the same.

Thirdly, acquiring the association relationship between the starting symbol and the length of the PDSCH of the second SSB and the starting symbol and the length of the PDSCH of the first SSB, which are predefined by the protocol.

In this way, by obtaining the correlation between the starting symbol and the length between the two, it is possible to determine the starting symbol and the length of the PDSCH of the second SSB based on the starting symbol and the length of the PDSCH of the first SSB, thereby receiving the PDSCH of the second SSB.

And fourthly, acquiring the incidence relation between the time domain information of the PDSCH of the second SSB and the time domain information of the PDSCH of the first SSB, wherein the initial position of the time domain information takes the monitoring opportunity position corresponding to the SSB as reference.

That is, the time domain information may be implicitly indicated, and the relationship between the two may be the same. For example, as shown in fig. 4, when the terminal detects DCI at the PDCCH monitoring occasion of SSB-1, the base station instructs the self-SSB to transmit the arrival information of PDSCH (e.g. k0 ═ 1, s ═ 8, and L ═ 6), and at the same time, the DCI instructs the second SBB SSB-2 to also transmit the same PDSCH, and the scheduling time implicit indication is the same as the scheduling parameters of SSB-1 (e.g. k0 ═ 1, s ═ 8, and L ═ 6). When the terminal calculates the PDSCH scheduling parameters of SIB-2, k0 is calculated from the PDCCH monitoring occasion corresponding to SSB-2 (i.e. time slot 4 in fig. 4), and then the scheduled PDSCH of SSB-2 is on time slot 5.

In addition, in the time domain information, when the number of the second SSBs is 1, the number of bits indicating the slot offset value of the PDSCH of the second SSB is the number of bits

When the number of the second SSBs is at least two, the number of bits indicating the slot offset value of the PDSCH of the second SSB is

P represents the number of different slot offset values in the PDSCH scheduling time domain table.

Specifically, when only one second SSB transmits PDSCH, it may be adopted

The bit indicates the slot offset value k 0. As shown in the following table, there are 4 different slot offset values k0(k0-0,2,3,4) in the PDSCH scheduling time domain table, 2bit is used to indicate the slot offset, 00 indicates k0-0, and 01 indicates that k0 is 2.

Index	Time domain term	Time domain term	Time domain term	Time domain term
					0-3	K0＝0,S＝2,L＝7	K0＝0,S＝2,L＝10	K0＝0,S＝2,L＝12	K0＝0,S＝4,L＝8
4-7	K0＝2,S＝2,L＝7	K0＝2,S＝2,L＝10	K0＝2,S＝2,L＝12	K0＝2,S＝4,L＝8
					8-11	K0＝3,S＝2,L＝7	K0＝3,S＝2,L＝10	K0＝3,S＝2,L＝12	K0＝3,S＝4,L＝8
11-15	K0＝4,S＝2,L＝7	K0＝4,S＝2,L＝10	K0＝4,S＝2,L＝12	K0＝4,S＝4,L＝8

Similarly, the calculation start position of k0 is calculated at the monitoring timing corresponding to the second SSB.

Optionally, an invalid entry (e.g., a non-number entry) may be added to the number k0, and when the DCI indicates the entry, it indicates that the corresponding SSB does not schedule corresponding PDSCH data, so that the indication overhead of 1bit may be saved.

Further, when there are multiple monitoring occasions (e.g. 2) for the SSB within a time window, the monitoring occasion when k0 is calculated may be indicated in the DCI, or the monitoring occasion for the PDCCH of the second SSB is associated with the monitoring occasion where the PDCCH of the first SSB is located, e.g. the same as the monitoring occasion where the PDCCH of the first SSB is located. For example, as shown in fig. 2, assuming that the terminal resides in SSB-1, if the terminal detects PDCCH on SSB-1PDCCH monitoring occasion (1) and DCI thereof indicates that PDSCH scheduling is performed by the second SSB-2, the terminal assumes that the scheduling signaling of SSB-2 transmits PDSCH on SSB-2PDCCH monitoring occasion (1), i.e. calculates time slot offset k0 of PDSCH, and uses SSB-2PDCCH monitoring occasion (1) as a reference time slot.

In addition, when the number of the second SSBs is two, that is, when 2 second SSBs are configured or indicated to transmit the PDSCH, the PDSCH is used

The bits indicate slot offset values. P is the number of different slot offset values k0 in the PDSCH scheduling time domain table. For example, in the following table example, if there are 5 different values of k0 in the PDSCH scheduling time domain table (k0-0,2,3,4, 5), 5 bits are used to indicate the joint slot offset of two second SSB scheduled PDSCHs, and the coding method is: s0+ s1 × P, s0 denotes the k0 index of the first second SSB scheduled PDSCH, and s1 denotes the k0 index of the second SSB scheduled PDSCH.

Index	Time domain term	Time domain term	Time domain term	Time domain term
					0-3	K0＝0,S＝2,L＝7	K0＝0,S＝2,L＝10	K0＝0,S＝2,L＝12	K0＝0,S＝4,L＝8
4-7	K0＝2,S＝2,L＝7	K0＝2,S＝2,L＝10	K0＝2,S＝2,L＝12	K0＝2,S＝4,L＝8
					8-11	K0＝3,S＝2,L＝7	K0＝3,S＝2,L＝10	K0＝3,S＝2,L＝12	K0＝3,S＝4,L＝8
11-15	K0＝4,S＝2,L＝7	K0＝4,S＝2,L＝10	K0＝5,S＝2,L＝12	K0＝5,S＝4,L＝8
					16	K0＝null

Similarly, the calculation start position of k0 is calculated according to the monitoring timing of the second SSB.

Optionally, an invalid entry (e.g., a non-numeric entry) may be added to the number k0, and when the DCI indicates the entry, it indicates that the corresponding SSB does not schedule corresponding PDSCH data, as in the 16 th row in the above table, the new k0 is added to null. That is, in the above table, there are different values of k0 in 6 (k0-0,2,3,4, 5, null) in the PDSCH scheduling time domain table. 2 second SSBs transmitting PDSCH using

Indicating a slot offset value. The coding method comprises the following steps: s0+ s1 × 6, when resolved to s 0-5 or/and s 1-5, indicates no relevant PDSCH transmission. This may save a 2bit indication to indicate whether the second SSB sends PDSCH.

Similarly, when the higher layer signaling configures 3 second SSBs to possibly transmit, the same method can be used.

Therefore, the DCI is adopted to indicate the time slot offset of the PDSCH sent by the second SSB, the blind detection process of the PDSCH of the second SSB by the terminal is avoided, meanwhile, the RV and the time domain information are implicitly indicated, and the indication overhead in the DCI is reduced.

In addition, as shown in fig. 5, a method for receiving broadcast multicast service data applied to a base station in the embodiment of the present invention includes the following steps:

step 501: and broadcasting and multicasting the first PDCCH, wherein the first DCI in the first PDCCH comprises scheduling indication information of the second SSB.

Specifically, the scheduling indication information includes detection indication information for indicating whether the terminal detects the second PDCCH of the broadcast multicast on the monitoring occasion of the second SSB, or the scheduling indication information includes transmission indication information for indicating whether the second SSB transmits the PDSCH and/or PDSCH scheduling information of the second SSB, so that the terminal determines whether to detect the second PDCCH or receive the PDSCH of the second SSB on the monitoring occasion of the second SSB based on the scheduling indication information.

Specifically, the detection indication information includes K bits, where K is the number of the second SSBs, and for each bit, when the value of the bit is a first preset value, the terminal is indicated to detect the second PDCCH of the broadcast multicast on the monitoring occasion corresponding to the second SSB, and when the value of the bit is a second preset value, the terminal is indicated not to detect the second PDCCH of the broadcast multicast on the monitoring occasion corresponding to the second SSB.

Further, before broadcasting and multicasting the first PDCCH, the present embodiment further includes: sending an MCCH or BCCH to a terminal, wherein the MCCH or BCCH carries monitoring opportunities of a plurality of SSBs, so that the terminal calculates the monitoring opportunity of each SSB in a preset calculation mode according to the monitoring opportunities of the plurality of SSBs, wherein the plurality of SSBs comprise a first SSB and a second SSB; or, the MCCH or BCCH carries monitoring opportunity configuration information of the first SSB and the second SSB, where the monitoring opportunity configuration information includes an SSB index value, a broadcast multicast detection period, and a time slot in which the first SSB and the second SSB are located in the broadcast multicast detection period; or, sending a dedicated signaling to the terminal, wherein the dedicated signaling contains monitoring opportunity configuration information of the first SSB and the second SSB;

in addition, it is also necessary to send, to the terminal, indication information for indicating the second SSB corresponding to each first SSB in the serving cell.

Specifically, the preset calculation method for calculating the monitoring time of each SSB is as follows:

SSB _n ＝{n×N/M，n×N/M+1......n×N/M+(N/M-1)}；

wherein, SSB _n The number of the monitoring occasions of the SSBs with the index number N is represented, N represents the total number of the monitoring occasions of all the SSBs in the serving cell configured by the base station, and M represents the number of all the SSBs in the serving cell or the number of the SSBs sent by the base station.

It should be noted that, the above specific process may refer to the content related to the terminal side, and is not described herein again.

Furthermore, the second DCI transmitted by the first DCI and the second PDCCH both include the HARQ process number and the NDI; if the base station indicates the terminal to detect the second PDCCH on the monitoring occasion of the second SSB, the HARQ process number in the first DCI is the same as the HARQ process number in the second DCI, and the NDI value in the first DCI is the same as the NDI value in the second DCI.

Further, the second DCI transmitted by the second PDCCH may further include third SSB scheduling indication information, which is used to instruct the terminal to autonomously determine whether to detect the third PDCCH of the third SSB broadcast multicast.

In addition, the first DCI further includes any one or a combination of the following indication information:

first, the position of the monitoring opportunity of the second SSB is indicated to be located after the monitoring opportunity of the first SSB or not earlier than the position of the monitoring opportunity of the first SSB;

secondly, when the number of the monitoring occasions of the second SSB is at least two, indicating a target monitoring occasion for performing second PDCCH detection by the terminal, where the target monitoring occasion is one or more of the at least two monitoring occasions of the second SSB;

thirdly, indicating the incidence relation between the monitoring opportunity of the terminal for detecting the second PDCCH and the monitoring opportunity of the first PDCCH detected by the first SSB;

Specifically, the association relationship between the parameters of the second PDCCH and the parameters of the first PDCCH includes: the Control Channel Element (CCE) of the second PDCCH is the same as the CCE aggregation level of the first PDCCH; and/or the CCE starting position of the second PDCCH is the same as that of the first PDCCH.

In addition, specifically, when only the transmission indication information is included in the first DCI, the second DCI transmitted by the second PDCCH is indicated to be the same as the first DCI, and the starting position of the slot offset value of the PDSCH of the second DCI refers to the monitoring opportunity position of the second SSB.

It should be noted that the PDSCH scheduling information includes K times Y bits, where K is the number of the second SSBs, and Y is the number of bits included in each scheduling field in the PDSCH.

In addition, when the first DCI includes only the transmission instruction information, the first DCI further includes any one or a combination of the following:

acquiring an association relation between a redundancy code version (RV) value of the PDSCH of the second SSB and a RV value of the PDSCH of the first SSB predefined by a protocol, or receiving a high-level signaling sent by the base station, wherein the high-level signaling carries the association relation between the RV value of the PDSCH of the second SSB and the RV value of the PDSCH of the first SSB;

acquiring an association relation between a modulation and coding format (MCS) of the PDSCH of the second SSB and the MCS of the PDSCH of the first SSB, wherein the association relation is predefined by a protocol;

acquiring an association relation between the starting symbol and the length of the PDSCH of the second SSB and the starting symbol and the length of the PDSCH of the first SSB, wherein the association relation is predefined by a protocol;

acquiring the association relationship between the time domain information of the PDSCH of the second SSB and the time domain information of the PDSCH of the first SSB, wherein the initial position of the time domain information takes the monitoring opportunity position of the corresponding SSB as reference.

Specifically, in the time domain information, when the number of the second SSBs is 1, the number of bits indicating the slot offset value of the PDSCH of the second SSB is equal to

It should be noted that, for the specific description of the above, reference may be made to the related contents of the terminal side method embodiment, and details are not described herein again.

In this way, the base station in this embodiment broadcasts and multicasts the first PDCCH, where the first DCI in the first PDCCH includes the scheduling indication information of the second SSB, so that the terminal can detect PDCCHs of other SSBs and receive PDSCHs of other SSBs, thereby improving the performance of receiving broadcast and multicast service data by the terminal.

It should be noted that: the base station includes the indication information of the second SSB in the first DCI, which can achieve the purposes of flexible scheduling of the base station and power saving of the terminal. Such as: when the base station schedules the broadcast multicast service data 1 on the first PDCCH of the first SSB, the base station may schedule or not schedule the broadcast multicast service data 1 on the second PDCCH of the second SSB, if the scheduling indicates 1, the terminal performs detection of the second PDCCH according to the indication. And if not, indicating 0, and the terminal does not need to detect the second PDCCH according to the indication. Certainly, if the base station considers that, when the broadcast/multicast service data 1 is scheduled on the first PDCCH of the first SSB, the broadcast/multicast service data 1 is also scheduled on the second PDCCH of the second SSB with a high probability, the default indication is always 1, that is, the indication may be omitted in the first DCI, and at this time, it may be determined that the broadcast/multicast service data 1 is scheduled by the second PDCCH by detecting the validity of the second PDCCH of the second SSB (if HARQ process numbers in the first DCI and the second DCH are the same, and NDI is the same, it is considered to be valid).

The present invention will be described in detail with reference to the following examples.

The first embodiment is as follows:

in this embodiment, the DCI instructs the terminal to detect the PDCCH of the second SSB, which is described herein as an adjacent SSB. The invention now comprises the following steps:

step 1, a base station configures the monitoring time of the broadcast multicast service in a cell and determines the monitoring time of each SSB.

Specifically, there are two types of indications, implicit indication and explicit indication, for determining the monitoring opportunity of the SSB. The implicit indication time base station and the terminal can calculate the monitoring time of each SSB according to a certain rule, the SSB index number and the monitoring opportunity number. The explicit indication is to specify which broadcast multicast monitoring occasions the SSB corresponds to when the base station configures the broadcast multicast monitoring occasions in the cell.

Taking implicit indication as an example, the monitoring opportunity of the SSB is described.

Specifically, in a logical control channel mcch (multicast control channel) of a broadcast multicast service, a base station configures monitoring occasions for all SSBs in a cell to send the broadcast multicast service, and calculates the monitoring occasions of broadcast multicast services corresponding to each SSB according to a certain rule.

For example, there are M total cells supporting SSB coverage areas (M ═ 4), and the index numbers are: SSB-0, SSB-1, SSB-2, and SSB-3, the base station is configured with a total of N monitoring occasions (N ═ 8). Then, the monitoring time corresponding to each SSB index value is: SSB _n N × N/M + (N/M-1) }, N being the index number of the SSB. That is, SSB-0 corresponds to {0, 1} and SSB-1 corresponds to {2, 3}, and so on. Here, the value of M may also be represented as the number of SSBs actually transmitted by the base station, and the SSB index value may be a sequence number of the SSBs actually transmitted by the base station.

And 2, the base station configures the adjacent relation of the SSBs.

The base station configures the neighbor relation of each SSB so that the terminal knows that the broadcast multicast service data transmitted by the neighboring SSB can be received. Such as by means of a bitmap. For example, assuming that the number M of SSBs actually transmitted by the base station is 4, each SSB may configure information of K (K ═ 2) neighboring SSBs. The SSB order represented by the bitmap is { SSB-0, SSB-1, SSB-2, SSB-3 }.

The bitmap order may be as follows:

the bitmap representation above means: SSB-0 and SSB-1/SSB-3 are adjacent, and SSB-1 and SSB0/SSB-2 are adjacent, pushing in sub-classes

It should be noted that, the neighboring means here indicates that the terminal can receive PDSCH data sent by the SSB coverage area, so as to improve the receiving performance of the broadcast multicast service; their geographic locations may or may not be contiguous. If the base station and the terminal agree that all SSBs sent in the cell are adjacent, or if the number L of actually sent SSBs is smaller than a certain threshold value (e.g., L <4), all the SSBs sent are considered to be adjacent, and the indication of the adjacent SSBs in this step may be omitted.

And 3, the terminal receives the broadcast multicast control channel and the service according to the monitoring opportunity of the first SSB and the adjacent SSB relation information of the first SSB.

Before receiving the broadcast multicast configuration information, the terminal usually performs cell camping and SSB selection, for example, selects the SSB with the strongest signal as the camped SSB, and receives the relevant broadcast multicast monitoring opportunity configuration information and the neighbor relation information of the SSB from the SSB. It should be noted that: the SSB that the terminal selects to reside is the behavior that the terminal realizes by itself. On the base station and the standard protocol, two aspects can be embodied: firstly, when a terminal performs initial access and initiates random access, an SSB is selected as a calculation parameter for calculating a sending random access time and receiving a PDCCH detection opportunity responded by a base station, and the SSB may be referred to as a camping SSB. The other is that the terminal is in a link state, and the base station instructs the terminal to detect mapping relation based on PDCCH and SSB in a search space of the terminal, and the SSB may be referred to as a camping SSB.

And the terminal determines the broadcast multicast monitoring time of the resident SSB according to the configuration information, detects a control channel on the monitoring time, receives the broadcast multicast service data according to the scheduling information if the corresponding broadcast multicast scheduling information is detected, and simultaneously receives the broadcast multicast service data sent by other SSBs according to the adjacent relation of the SSBs.

In the method for receiving the PDSCH transmitted by the adjacent SSB, an adjacent SSB detection instruction is added to the DCI to instruct the terminal to perform the detection of the broadcast multicast control channel of the adjacent SSB. An example procedure is as follows:

assuming that the maximum number of the neighboring SSBs configured in step 2 is K-2 neighboring SSBs, 2 bits are used in DCI to indicate whether to perform neighboring SSB broadcast multicast control channel detection. The relevant DCI cells may be represented as follows:

frequency domain resource allocation indication-L bits: the method comprises the steps of indicating the bandwidth and the position of a frequency domain of a scheduled PDSCH, wherein the occupied bit width is related to the maximum bandwidth which can be scheduled in total;

time domain resource allocation indication-4 bits: an indication of a time domain for indicating scheduling of a PDSCH;

modulation coding format-5 bits: the modulation order and the channel coding rate used for indicating the PDSCH;

redundancy coding version-2 bits, redundancy version number of data transmission, used for channel decoding and demodulation.

New data indication-1 bit, indicating whether the packet was transmitted for the first time or repeatedly;

HARQ process ID (HARQ-processor ID) -4 bits: a process number of a hybrid automatic repeat request;

adjacent SSB detection indication (neighbor SSB detection indicator) -K bit: the invention adds the indication content, and the bit number is the number K of the configured adjacent SSBs. When the indication bit is 1, it indicates that the corresponding control channel needs to be detected at the monitoring timing of the corresponding SSB, and when the indication bit is 0, it indicates that the corresponding control channel does not need to be detected at the monitoring timing of the corresponding SSB. Or vice versa.

FIG. 6 is a schematic diagram illustrating detection indication of adjacent SSBs. Referring to fig. 6, assuming that the base station actually sends 4 SSBs in a cell, the base station indicates that the SSBs neighboring relationship is: adjacent to SSB-1 are SSB-0 and SSB-2, and to SSB-2 are SSB-1 and SSB-3. SSB-1 monitoring in time slot 2, SSB-2 monitoring in time slot 4, SSB-3 monitoring in time slot 6. The terminal resides in SSB-1 to receive the broadcast multicast service.

At the monitoring time 1 (corresponding to the time slot 2), the terminal performs PDCCH detection for broadcast multicast, the detected DCI includes "01" adjacent SSB detection indication, the 1 st bit corresponds to the control channel detection indication of SSB0, the value "0" indicates that PDCCH detection is not required at the monitoring time of SSB0, the 2 nd bit corresponds to the control channel detection indication of SSB2, and the value "1" indicates that PDCCH detection is required at the monitoring time of SSB 2.

According to the DCI indication, the terminal firstly receives the PDSCH-1 scheduled by the DCI, then carries out PDCCH detection of SSB-2 broadcast multicast at the monitoring time of the SSB-2, and receives the PDSCH-2 according to the detection indication information.

Therefore, the terminal can receive the broadcast multicast data sent by the SSB-2 in addition to the broadcast multicast data sent by the SSB according to the DCI indication, thereby effectively increasing the receiving performance of the terminal on the broadcast multicast service.

Example two:

in this embodiment, the DCI indicates PDSCH scheduling information of the second SSB, which is illustrated herein as a neighboring SSB. The invention now comprises the following steps:

step 1, which is the same as step 1 in the first embodiment.

Here, the explicit indication is taken as an example to explain the monitoring timing of the SSB.

In the MCCH of the broadcast multicast service, a base station explicitly configures the monitoring time of SSB for sending the broadcast multicast service in a cell, and the configuration content comprises the following steps: the cell identification number, the index number of the SSB sending the broadcast multicast service, the monitoring opportunity period and the position offset of the broadcast multicast service.

Specifically, the purpose of adding the cell identification number is to enable the terminal to receive the broadcast multicast service data in the coverage area of the cell SSB, and also to receive the broadcast multicast service data sent in the coverage area of other cells SSB.

In addition, the monitoring opportunity may define the following fields:

{

field 1: the broadcast multicast service identification number is as follows: the identification number of the service for indicating the data of the broadcast multicast service may skip these monitoring occasions when the terminal is not interested in the service, i.e. the PDCCH is not detected.

Field 2: and the cell identification number is used for identifying the number of the cell.

Field 3: and the SSB identification number is used for identifying the number of the SSB.

Field 4: the broadcast multicast detection period and the period offset are as follows: the unit may be a time slot identifying the broadcast multicast detection period and the time slot within the period for the corresponding SSB.

}

Step 2 is the same as step 2 in the first embodiment, and will not be described here.

And 3, the terminal receives the broadcast multicast service according to the monitoring opportunity of the first SSB and the adjacent SSB relation information of the first SSB.

Specifically, the base station may explicitly indicate the scheduling condition of the PDSCH of the neighboring SSB by adding the PDSCH scheduling information of the neighboring SSB to the DCI; in addition, the PDSCH scheduling information of the neighboring SSBs may also be given in the implicit indication manner in this embodiment.

When the explicit indication is given, the terminal adds transmission indication information indicating whether or not the neighboring SSB transmits the PDSCH and/or PDSCH scheduling information of the neighboring SSB to the DCI.

Namely, the newly added cells in the relevant DCI are as follows:

the neighboring SSB sends an indication: k bits, where K indicates the number of adjacent SSBs, whether or not the adjacent SSBs transmitted the PDSCH, and if 1, it indicates transmission, and 0 indicates no transmission. Or vice versa.

Neighbor SSB PDSCH scheduling information (neighbor SSB PDSCH scheduling information) -K × Y bits: k denotes the number of adjacent SSBs, and Y denotes scheduling information of PDSCH of each adjacent SSB.

In addition, when implicitly indicating, implicit indication may be performed on RV, MCS, and time domain information of the PDSCH, and the indication manner may refer to the content related to the terminal side, which is not described repeatedly herein.

In addition, as shown in fig. 7, a block diagram of a receiving apparatus for receiving broadcast multicast service data applied to a terminal in an embodiment of the present invention is shown, where the apparatus includes:

a detecting module 701, configured to detect a first physical downlink control channel PDCCH of a broadcast multicast at a monitoring occasion of a first system synchronization block SSB, where a first downlink control information DCI transmitted by the first PDCCH includes scheduling indication information of a second SSB, where the scheduling indication information includes detection indication information used to indicate whether a terminal detects the second PDCCH of the broadcast multicast at the monitoring occasion of the second SSB, or the scheduling indication information includes transmission indication information used to indicate whether the second SSB transmits a physical downlink shared channel PDSCH and/or PDSCH scheduling information of the second SSB;

a determining module 702, configured to determine whether to detect the second PDCCH or receive the PDSCH of the second SSB on the monitoring occasion of the second SSB based on the scheduling indication information.

The apparatus provided in this embodiment can implement all the method steps that can be implemented by the terminal-side method embodiment described above, and can achieve the same technical effect, which is not described herein again.

In addition, as shown in fig. 8, a block diagram of a receiving apparatus for receiving broadcast multicast service data applied to a base station in the embodiment of the present invention is shown, where the apparatus includes:

a broadcast module 801, configured to broadcast and multicast a first physical downlink control channel PDCCH, where a first downlink control information DCI in the first PDCCH includes scheduling indication information of a second SSB, where the scheduling indication information includes detection indication information used to indicate whether a terminal detects the second PDCCH of the broadcast and multicast on a monitoring occasion of the second SSB, or the scheduling indication information includes transmission indication information used to indicate whether the second SSB sends a physical downlink shared channel PDSCH and/or PDSCH scheduling information of the second SSB, so that the terminal determines whether to detect the second PDCCH on the monitoring occasion of the second SSB or receive the PDSCH of the second SSB based on the scheduling indication information.

The apparatus provided in this embodiment can implement all the method steps that can be implemented in the method embodiment on the base station side, and can achieve the same technical effects, which are not described herein again.

Fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present invention, and as shown in fig. 9, the terminal 900 may include: at least one processor 901, memory 902, at least one network interface 904, and other user interfaces 903. The various components in terminal 900 are coupled together by a bus system 905. It is understood that the bus system 905 is used to enable communications among the components. The bus system 905 includes a power bus, a control bus, and a status signal bus, in addition to a data bus. For clarity of illustration, however, the various buses are labeled in fig. 9 as bus system 905.

The user interface 903 may include, among other things, a display, a keyboard, or a pointing device, such as a mouse, trackball (trackball), touch pad, or touch screen.

It is to be understood that the memory 902 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. The volatile Memory may be a Random Access Memory (RAM) which serves as an external cache. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 902 of the subject systems and methods described in connection with the various embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 902 stores elements, executable modules or data structures, or a subset thereof, or an expanded set thereof, such as: an operating system 9021 and application programs 9022.

The operating system 9021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is configured to implement various basic services and process hardware-based tasks. The application 9022 includes various applications, such as a Media Player (Media Player), a Browser (Browser), and the like, for implementing various application services. A program implementing the method of an embodiment of the present invention may be included in application 9022.

In the embodiment of the present invention, by calling a computer program or an instruction stored in the memory 902, specifically, a computer program or an instruction stored in the application 9022, the processor 901 is configured to: detecting a first Physical Downlink Control Channel (PDCCH) of a broadcast multicast on a monitoring opportunity of a first System Synchronization Block (SSB), wherein a first Downlink Control Information (DCI) transmitted by the first PDCCH contains scheduling indication information of a second SSB, and the scheduling indication information comprises detection indication information of the second PDCCH used for indicating whether a terminal detects the broadcast multicast on the monitoring opportunity of the second SSB, or the scheduling indication information comprises transmission indication information used for indicating whether the second SSB sends a Physical Downlink Shared Channel (PDSCH) and/or PDSCH scheduling information of the second SSB; determining whether to detect the second PDCCH or receive the PDSCH of the second SSB on the monitoring occasion of the second SSB based on the scheduling indication information.

The method disclosed in the above embodiments of the present invention may be applied to the processor 901, or implemented by the processor 901. The processor 901 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware in the processor 901 or by instructions in the form of software. The Processor 901 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known 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 the hardware thereof.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.

For a software implementation, the techniques described may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in the embodiments of the invention. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

Optionally, as another embodiment, the detection indication information includes K bits, where K is the number of the second SSBs, and for each bit, when a value of the bit is a first preset value, the terminal is indicated to detect the second PDCCH of the broadcast multicast on the monitoring occasion corresponding to the second SSB, and when the value of the bit is a second preset value, the terminal is indicated not to detect the second PDCCH of the broadcast multicast on the monitoring occasion corresponding to the second SSB.

Optionally, as another embodiment, the first DCI and the second DCI transmitted by the second PDCCH both include a process number of a hybrid automatic repeat request HARQ and a new data indication NDI; and when the HARQ process number in the first DCI is the same as the HARQ process number in the second DCI and when the NDI value in the first DCI is the same as the NDI value in the second DCI, indicating the terminal to receive the PDSCH of the second SSB.

Optionally, as another embodiment, if the second DCI transmitted by the second PDCCH includes third SSB scheduling indication information, the terminal autonomously determines whether to detect a third PDCCH of a third SSB broadcast multicast.

Optionally, as another embodiment, the first DCI further includes any one or a combination of the following pieces of indication information:

indicating that the location of the monitoring opportunity of the second SSB is located after or no earlier than the location of the monitoring opportunity of the first SSB;

when the number of the monitoring occasions of the second SSB is at least two, indicating a target monitoring occasion for performing second PDCCH detection by the terminal, where the target monitoring occasion is one or more of the at least two monitoring occasions of the second SSB;

indicating the incidence relation between the monitoring opportunity of the terminal for detecting the second PDCCH and the monitoring opportunity of the first PDCCH detected by the first SSB;

indicating an association between a parameter of the second PDCCH and a parameter of the first PDCCH.

Optionally, as another embodiment, the association relationship between the parameter of the second PDCCH and the parameter of the first PDCCH includes: the Control Channel Element (CCE) of the second PDCCH is the same as the CCE aggregation level of the first PDCCH; and/or the CCE starting position of the second PDCCH is the same as that of the first PDCCH.

Optionally, as another embodiment, when only the transmission indication information is included in the first DCI, it is indicated that a second DCI transmitted by the second PDCCH is the same as the first DCI, and a starting position of a slot offset value of a PDSCH of the second DCI is referred to the monitoring timing position of the second SSB.

Optionally, as another embodiment, the PDSCH scheduling information includes K times Y bits, where K is the number of the second SSBs and Y is the number of bits included in each scheduling field in the PDSCH.

Optionally, as another embodiment, when only the transmission indication information is included in the first DCI, the processor 901 is further configured to:

acquiring an association relation between a starting symbol and a length of the PDSCH of the second SSB and a starting symbol and a length of the PDSCH of the first SSB, wherein the association relation is predefined by a protocol;

Optionally, as another embodiment, in the time domain information, when the number of the second SSBs is 1, the number of bits indicating the slot offset value of the PDSCH of the second SSB is equal to

Optionally, as another embodiment, the processor 901 is further configured to: receiving a multicast control channel MCCH or broadcast control channel BCCH sent by a base station, wherein the MCCH or BCCH carries monitoring occasions of a plurality of SSBs, and calculating the monitoring occasions of each SSB in a preset calculation mode according to the monitoring occasions of the plurality of SSBs, wherein all the SSBs comprise a first SSB and a second SSB; or, the MCCH or BCCH carries monitoring opportunity configuration information of a first SSB and a second SSB, where the monitoring opportunity configuration information includes an SSB index value, a broadcast multicast detection period, and time slots in which the first SSB and the second SSB are located in the broadcast multicast detection period; or receiving a dedicated signaling sent by a base station, wherein the dedicated signaling contains monitoring opportunity configuration information of the first SSB and the second SSB;

and receiving indication information which is sent by the base station and used for indicating the second SSB corresponding to each first SSB in the serving cell.

Optionally, as another embodiment, the processor 901 is further configured to: the monitoring opportunity of each SSB is calculated by the following formula:

SSB_n＝{n×N/M，n×N/M+1……n×N/M+(N/M-1)}；

wherein, SSB _ N represents the monitoring opportunity of the SSB with index number N, N represents the total number of monitoring opportunities of all SSBs in the serving cell configured by the base station, and M represents the number of all SSBs coverage areas in the serving cell or the number of SSBs sent by the base station.

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

Fig. 10 is a schematic structural diagram of a base station according to an embodiment of the present invention, and as shown in fig. 10, the base station 1000 may include at least one processor 1001, a memory 1002, at least one other user interface 1003, and a transceiver 1004. The various components in the base station 1000 are coupled together by a bus system 1005. It is understood that bus system 1005 is used to enable communications among the components connected. The bus system 1005 includes a power bus, a control bus, and a status signal bus, in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 1005 in fig. 10, which may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1001, and various circuits, represented by memory 1002, being linked together. The bus system may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, embodiments of the present invention will not be described any further. The bus interface provides an interface. The transceiver 1004 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 1003 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

It is to be understood that the memory 1002 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 1002 of the described systems and methods for embodiments of the present invention is intended to comprise, without being limited to, these and any other suitable types of memory.

The processor 1001 is responsible for managing the bus system and general processing, and the memory 1002 may store computer programs or instructions used by the processor 1001 in performing operations, and in particular, the processor 1001 may be configured to: the method comprises the steps of broadcasting and multicasting a first Physical Downlink Control Channel (PDCCH), wherein a first Downlink Control Information (DCI) in the first PDCCH comprises scheduling indication information of a second single cell shift indicator (SSB), and the scheduling indication information comprises detection indication information of the second PDCCH used for indicating whether a terminal detects the broadcasting and multicasting on monitoring occasions of the second SSB, or the scheduling indication information comprises transmission indication information used for indicating whether the second SSB sends a Physical Downlink Shared Channel (PDSCH) and/or PDSCH scheduling information of the second SSB, so that the terminal determines whether to detect the second PDCCH or receive the PDSCH of the second SSB on the monitoring occasions of the second SSB based on the scheduling indication information.

The method disclosed by the embodiment of the invention can be applied to the processor 1001 or can be implemented by the processor 1001. The processor 1001 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 1001. The Processor 1001 may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1002, and the processor 1001 reads the information in the memory 1002 and performs the steps of the method in combination with the hardware.

Optionally, as another embodiment, the first DCI and the second DCI transmitted by the second PDCCH both include a process number of a hybrid automatic repeat request HARQ and a new data indication NDI; if the base station indicates the terminal to detect the second PDCCH on the monitoring occasion of the second SSB, the HARQ process number in the first DCI is the same as the HARQ process number in the second DCI, and when the NDI value in the first DCI is the same as the NDI value in the second DCI.

indicating that the location of the monitoring opportunity of the second SSB is located after or no earlier than the location of the monitoring opportunity of the first SSB; when the number of the monitoring occasions of the second SSB is at least two, indicating a target monitoring occasion for performing second PDCCH detection by the terminal, where the target monitoring occasion is one or more of the at least two monitoring occasions of the second SSB; indicating the incidence relation between the monitoring opportunity of the terminal for detecting the second PDCCH and the monitoring opportunity of the first PDCCH detected by the first SSB; indicating an association between a parameter of the second PDCCH and a parameter of the first PDCCH.

Optionally, as another embodiment, the association relationship between the parameter of the second PDCCH and the parameter of the first PDCCH includes:

the Control Channel Element (CCE) of the second PDCCH is the same as the CCE aggregation level of the first PDCCH; and/or the CCE starting position of the second PDCCH is the same as that of the first PDCCH.

Optionally, as another embodiment, when the first DCI includes only the transmission indication information, the method further includes any one or a combination of the following:

acquiring an association relation between a redundancy code version (RV) value of the PDSCH of the second SSB and a RV value of the PDSCH of the first SSB predefined by a protocol, or receiving a high-level signaling sent by the base station, wherein the high-level signaling carries the association relation between the RV value of the PDSCH of the second SSB and the RV value of the PDSCH of the first SSB; acquiring an association relation between a modulation and coding format (MCS) of the PDSCH of the second SSB and the MCS of the PDSCH of the first SSB, wherein the association relation is predefined by a protocol; acquiring an association relation between a starting symbol and a length of the PDSCH of the second SSB and a starting symbol and a length of the PDSCH of the first SSB, wherein the association relation is predefined by a protocol; acquiring the association relation between the time domain information of the PDSCH of the second SSB and the time domain information of the PDSCH of the first SSB, wherein the initial position of the time domain information takes the monitoring opportunity position of the corresponding SSB as reference.

Optionally, as another embodiment, in the time domain information, when the number of the second SSBs is 1, the number of bits indicating the slot offset value of the PDSCH of the second SSB is 1

Optionally, as another embodiment, the processor 1001 is further configured to: sending a multicast control channel MCCH or a broadcast control channel BCCH to a terminal, wherein the MCCH or the BCCH carries monitoring occasions of a plurality of SSBs, so that the terminal calculates the monitoring occasions of each SSB in a preset calculation mode according to the monitoring occasions of the plurality of SSBs, wherein the plurality of SSBs comprise a first SSB and a second SSB; or, the MCCH or BCCH carries monitoring opportunity configuration information of a first SSB and a second SSB, where the monitoring opportunity configuration information includes an SSB index value, a broadcast multicast detection period, and time slots in which the first SSB and the second SSB are located in the broadcast multicast detection period; or, sending a dedicated signaling to the terminal, where the dedicated signaling includes monitoring opportunity configuration information of the first SSB and the second SSB; and sending indication information for indicating the second SSB corresponding to each first SSB in the serving cell to the terminal.

Optionally, as another embodiment, the preset calculation manner for calculating the monitoring timing of each SSB is as follows:

SSB _n ＝{n×N/M，n×N/M+1......n×N/M+(N/M-1)}；

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

The above description mainly introduces the solutions provided by the embodiments of the present invention from the perspective of electronic devices. It is understood that the electronic device provided by the embodiment of the present invention includes a hardware structure and/or a software module for performing the above functions. Those of skill in the art will readily appreciate that the present invention is capable of being implemented as hardware or a combination of hardware and computer software components based on the exemplary elements and algorithm steps described in connection with the embodiments disclosed herein.

Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the embodiment of the present invention, the electronic device and the like may be divided into functional modules according to the above method examples, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the technical solution can be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a processor to execute all or part of the steps of the method according to the embodiments of the present invention. The computer storage medium is a non-transitory (English) medium, comprising: flash memory, removable hard drive, read only memory, random access memory, magnetic or optical disk, and the like.

On the other hand, an embodiment of the present invention further 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, the method provided in the foregoing embodiments is implemented and can achieve the same technical effect, which is not described herein again.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A receiving method of broadcast multicast service data is applied to a terminal, and is characterized by comprising the following steps:

determining whether to detect the second PDCCH or receive the PDSCH of the second SSB on the monitoring occasion of the second SSB based on the scheduling indication information;

the first DCI and the second DCI transmitted by the second PDCCH both comprise a process number of hybrid automatic repeat request (HARQ) and a New Data Indication (NDI); wherein the content of the first and second substances,

and when the HARQ process number in the first DCI is the same as the HARQ process number in the second DCI and when the NDI value in the first DCI is the same as the NDI value in the second DCI, indicating a terminal to receive the PDSCH of the second SSB.

2. The method according to claim 1, wherein the detection indication information includes K bits, where K is the number of the second SSBs, and for each bit, when the value of the bit is a first preset value, the terminal is instructed to detect the second PDCCH of the broadcast multicast at the monitoring timing corresponding to the second SSB, and when the value of the bit is a second preset value, the terminal is instructed not to detect the second PDCCH of the broadcast multicast at the monitoring timing corresponding to the second SSB.

3. The method according to claim 1, wherein if the second DCI transmitted by the second PDCCH includes the third SSB scheduling indication information, the terminal autonomously determines whether to detect the third PDCCH of the third SSB broadcast multicast.

4. The method of receiving mbms data according to claim 1, wherein the first DCI further includes any one or a combination of the following indication information:

5. The method of receiving mbms data according to claim 4, wherein the association relationship between the parameters of the second PDCCH and the parameters of the first PDCCH includes:

the Control Channel Element (CCE) of the second PDCCH is the same as the CCE aggregation level of the first PDCCH; and/or the presence of a gas in the gas,

the CCE starting position of the second PDCCH is the same as that of the first PDCCH.

6. The method according to claim 1, wherein when only the transmission indication information is included in a first DCI, a second DCI transmitted by the second PDCCH is indicated to be the same as the first DCI, and a starting position of a slot offset value of a PDSCH of the second DCI is referenced to a monitoring opportunity position of the second SSB.

7. The method of claim 1, wherein the PDSCH scheduling information comprises K times Y bits, where K is the number of the second SSBs and Y is the number of bits included in each scheduling field in the PDSCH.

8. The method according to claim 1, wherein when the first DCI includes only the transmission indication information, the method further includes any one or a combination of the following:

acquiring an incidence relation between a redundancy code version RV value of the PDSCH of the second SSB and a RV value of the PDSCH of the first SSB predefined by a protocol, or receiving a high-level signaling sent by a base station, wherein the high-level signaling carries the incidence relation between the RV value of the PDSCH of the second SSB and the RV value of the PDSCH of the first SSB;

acquiring an association relation between a modulation and coding format (MCS) of the PDSCH of the second SSB and a MCS of the PDSCH of the first SSB, wherein the association relation is predefined by a protocol;

acquiring the association relation between the time domain information of the PDSCH of the second SSB and the time domain information of the PDSCH of the first SSB, wherein the initial position of the time domain information takes the monitoring opportunity position of the corresponding SSB as reference.

9. The method of receiving broadcast multicast service data according to claim 8,

in the time domain information, when the number of the second SSBs is 1, the number of bits indicating the slot offset value of the PDSCH of the second SSB is 1

10. The method according to any of claims 1 to 9, wherein before detecting the first PDCCH of the broadcast multicast on the monitoring occasion of the first SSB, the method further comprises:

receiving a multicast control channel MCCH or a broadcast control channel BCCH sent by a base station, wherein the MCCH or the BCCH carries monitoring opportunities of a plurality of SSBs, and calculating the monitoring opportunities of each SSB in a preset calculation mode according to the monitoring opportunities of the plurality of SSBs, wherein the plurality of SSBs comprise a first SSB and a second SSB; or, the MCCH or BCCH carries monitoring opportunity configuration information of a first SSB and a second SSB, where the monitoring opportunity configuration information includes an SSB index value, a broadcast multicast detection period, and time slots in which the first SSB and the second SSB are located in the broadcast multicast detection period; or receiving a dedicated signaling sent by a base station, wherein the dedicated signaling contains monitoring opportunity configuration information of the first SSB and the second SSB;

11. The method of claim 10, wherein the calculating, according to the monitoring timings of the SSBs, the monitoring timing of each SSB in a preset calculation manner includes:

the monitoring opportunity of each SSB is calculated by the following formula:

SSB _n ＝{n×N/M，n×N/M+1......n×N/M+(N/M-1)}；

12. A receiving method of broadcast multicast service data is applied to a base station, and is characterized by comprising the following steps:

a first Physical Downlink Control Channel (PDCCH) for broadcast multicast, wherein a first Downlink Control Information (DCI) in the first PDCCH contains scheduling indication information of a second single serving cell (SSB), and the scheduling indication information comprises detection indication information of the second PDCCH for indicating whether a terminal detects broadcast multicast at a monitoring occasion of the second SSB, or the scheduling indication information comprises transmission indication information for indicating whether the second SSB sends a Physical Downlink Shared Channel (PDSCH) and/or PDSCH scheduling information of the second SSB, so that the terminal determines whether to detect the second PDCCH at the monitoring occasion of the second SSB or receive the PDSCH of the second SSB based on the scheduling indication information;

if the base station indicates the terminal to detect the second PDCCH on the monitoring occasion of the second SSB, the HARQ process number in the first DCI is the same as the HARQ process number in the second DCI, and when the NDI value in the first DCI is the same as the NDI value in the second DCI.

13. The method of receiving mbms data according to claim 12, wherein the detection indication information includes K bits, where K is the number of the second SSBs, and for each bit, when a value of the bit is a first preset value, the terminal is instructed to detect the second PDCCH of the multicast broadcast at the monitoring timing corresponding to the second SSB, and when the value of the bit is a second preset value, the terminal is instructed not to detect the second PDCCH of the multicast broadcast at the monitoring timing corresponding to the second SSB.

14. The method of receiving mbms data according to claim 12, wherein the first DCI further includes any one or a combination of the following indication information:

15. The method of receiving mbms data according to claim 14, wherein the association relationship between the parameters of the second PDCCH and the parameters of the first PDCCH comprises:

16. The method of receiving mbms data according to claim 12, wherein when only the transmission indication information is included in a first DCI, a second DCI transmitted on the second PDCCH is indicated to be the same as the first DCI, and a starting position of a slot offset value of a PDSCH of the second DCI is referenced to a monitoring timing position of the second SSB.

17. The method of claim 12, wherein the PDSCH scheduling information comprises K times Y bits, where K is the number of the second SSBs and Y is the number of bits included in each scheduling field in the PDSCH.

18. The method according to claim 12, wherein when the first DCI only includes the transmission indication information, the method further includes any one or a combination of the following:

19. The method for receiving broadcast multicast service data according to claim 18,

20. The method for receiving mbms data according to any one of claims 12 to 19, wherein before the PDCCH, the method further comprises:

sending a multicast control channel MCCH or a broadcast control channel BCCH to a terminal, wherein the MCCH or the BCCH carries monitoring occasions of a plurality of SSBs, so that the terminal calculates the monitoring occasions of each SSB in a preset calculation mode according to the monitoring occasions of the plurality of SSBs, wherein the plurality of SSBs comprise a first SSB and a second SSB; or, the MCCH or BCCH carries monitoring opportunity configuration information of a first SSB and a second SSB, where the monitoring opportunity configuration information includes an SSB index value, a broadcast multicast detection period, and time slots in which the first SSB and the second SSB are located in the broadcast multicast detection period; or, sending a dedicated signaling to the terminal, where the dedicated signaling includes monitoring opportunity configuration information of the first SSB and the second SSB;

and sending indication information for indicating the second SSB corresponding to each first SSB in the serving cell to the terminal.

21. The method of receiving mbs data according to claim 20, wherein the predetermined calculation manner for calculating the monitoring time of each SSB is as follows:

SSB _n ＝{n×N/M，n×N/M+1......n×N/M+(N/M-1)}；

22. A receiving device of broadcast multicast service data is applied to a terminal, and is characterized by comprising:

a determining module, configured to determine whether to detect the second PDCCH or receive the PDSCH of the second SSB on the monitoring occasion of the second SSB based on the scheduling indication information;

23. A receiving device for broadcast multicast service data, applied to a base station, is characterized by comprising:

a broadcast module, configured to broadcast and multicast a first physical downlink control channel PDCCH, where a first downlink control information DCI in the first PDCCH includes scheduling indication information of a second SSB, where the scheduling indication information includes detection indication information used to indicate whether a terminal detects the second PDCCH of the broadcast and multicast on a monitoring occasion of the second SSB, or the scheduling indication information includes transmission indication information used to indicate whether the second SSB sends a physical downlink shared channel PDSCH and/or PDSCH scheduling information of the second SSB, so that the terminal determines whether to detect the second PDCCH on the monitoring occasion of the second SSB or receive the PDSCH of the second SSB based on the scheduling indication information;

24. A terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the computer program performs the steps of:

25. A base station comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the computer program performs the steps of:

26. A non-transitory computer readable storage medium, having stored thereon a computer program, characterized in that the computer program, when being executed by a processor, is adapted to carry out the steps of the method according to any one of claims 1 to 11 or to carry out the steps of the method according to any one of claims 12 to 21.