WO2021030959A1

WO2021030959A1 - Mbms synchronization method and apparatus

Info

Publication number: WO2021030959A1
Application number: PCT/CN2019/101092
Authority: WO
Inventors: 黄曲芳; 曾清海
Original assignee: 华为技术有限公司
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2021-02-25

Abstract

The embodiments of the present application relate to a MBMS synchronization method and apparatus, which are used to implement MBMS synchronization and to simplify the MBMS synchronization process. The MBMS synchronization method is: a centralized unit obtains a first service to be combined, and determines two or more first cells to combine the first service; the centralized unit allocates to the two or more first cells transmission resources for transmitting the first service, and sends a first message to distributed units where the two or more first cells are located, the first message being used to notify the two or more first cells to utilize the transmission resources to transmit the first service, wherein said transmission resources allocated to each first cell are the same.

Description

A MBMS synchronization method and device

Technical field

This application relates to the field of wireless communication technology, and in particular to an MBMS synchronization method and device.

Background technique

In the existing Multimedia Broadcast Multicast Service (MBMS) synchronization process, in the MBMS data source, the SYNC protocol entity puts a time stamp on each data packet, and the cell (or base station) according to the time stamp of the data packet , Each data packet is mapped to the corresponding scheduling period. For each data packet, multiple cells transmit the data packet in the scheduling period corresponding to the data packet, so that multiple cells can simultaneously send broadcast services and send For the same data packet, a multicast/multicast single frequency network (Multicast Broadcast Single Frequency Network, MBSFN) combination is realized on the terminal side. However, this method requires the addition of SYNC protocol entities in the MBMS data source and the base station, and the MBMS data source needs to time-stamp the data packet and ensure that the base station (or cell within the base station) infers the same transmission time based on the timestamp. Therefore, It is complicated to realize MBMS synchronization.

Summary of the invention

The embodiments of the present application provide an MBMS synchronization method and device, so as to realize MBMS synchronization and simplify the process of MBMS synchronization.

In a first aspect, an MBMS synchronization method is provided, which includes the following process: a centralized unit acquires a first service to be merged, and determines at least two first cells to merge the first service; the centralized unit is The at least two first cells allocate transmission resources for transmitting the first service, and send a first message to the distribution unit where the at least two first cells are located, and the first message is used to notify the at least two The first cell uses the transmission resources to transmit the first service, where the transmission resources allocated to each first cell for transmitting the first service are the same; the distribution unit receives the first message sent by the centralized unit.

For example, the centralized unit acquires the second service that is about to start transmission, and the second cell responsible for transmitting the second service. Determine the first service to be merged in the second service that is about to start transmission, and determine at least two first cells to merge the first service in the second cell responsible for transmitting the first service.

Wherein, the quantity of the first service may be one or more, and the quantity of the second service may also be one or more.

For example, the second service is an MBMS service, and the MBMS service includes a session service.

Specifically, at least two first cells merge the first service, which means that each first cell of the at least two first cells transmits the same transmission block including the first service on the air interface, and each first cell The time-frequency resources for the cell to transmit the same transport block are also completely the same.

According to the solution provided by the embodiments of the present application, the centralized unit determines the first service to be merged, and determines at least two first cells that merge the first service, and the centralized unit is the at least two merged first services. The first cell is allocated the same transmission resource, each first cell can use the same allocated transmission resource to transmit the first service, and the terminal can transmit the data information of the first service for each first cell through the same transmission resource Merging to achieve content synchronization. Therefore, through this method, the centralized unit allocates the same transmission resource to each first cell that performs the first service combination, and each first cell can transmit the data information of the first service through the same transmission resource. The data source and the base station are both There is no need to add a new SYNC protocol entity, and the centralized unit is responsible for business consolidation and allocation of transmission resources, thereby simplifying the process of content synchronization.

In a possible implementation, the method further includes:

The port number allocated by the centralization unit for the first service, where the port number of the first service is used to receive data information of the first service sent by a core network device.

Specifically, the centralized unit may allocate a corresponding port number for each second service, thereby allocating a corresponding port number for the first service, and the port number of the second service is used to receive the data information of the second service sent by the core network.

For example, the centralized unit sends the port number allocated for the second service (including the port number allocated for the first service) to the core network device.

In this implementation, the centralized unit allocates a port number for the first service to receive the data information of the first service sent by the core network device, so as to realize the synchronization of the MBMS content.

In a possible implementation, the centralized unit determines at least two first cells that merge the first service according to the geographic location of each cell in the second cell and/or the frequency point information of each cell. The second cell is a cell responsible for transmitting the first service, and the second cell includes the at least two first cells.

In a possible implementation, the allocating, by the centralizing unit, the transmission resources for transmitting the first service to the at least two first cells includes:

Determining, by the centralized unit, a time interval for generating a radio resource block for transmitting the first service, and the size of the radio resource block;

The centralized unit determines the time-frequency information where the radio resource block is located.

Specifically, the centralized unit determines the time interval for generating the radio resource block and the size of the non-resource block according to the data amount and time delay of the first service. Optionally, the time interval for generating the radio resource block is not greater than (that is, less than or equal to) the time delay.

The time-frequency information includes information such as slot number, sub-carrier spacing, cyclic prefix length, and TTI length. The time-frequency information is used to indicate the time-frequency position of the radio resource block.

Specifically, the time-frequency information of the periodically occurring radio resource blocks determined by the centralized unit includes: the radio frame number and subframe number of the radio resource block in each first cell, that is, the radio resource block in each first cell The number of radio frames in which number of subframes appear, and the index of the sub-band where the radio resource block is located in the first cell, that is, the sub-band is located in the first cell, the BWP identifier and the location identifier in the BWP, and The identification of the PRB occupied by the radio resource block.

Optionally, the time-frequency positions of the generated radio resource blocks may be continuous or discontinuous.

In this implementation, the centralized unit transmits the same transmission resources for the second service for each first cell, which can ensure that the transmission block containing the first service transmitted by each first cell on the air interface is the same, and each first cell The time-frequency resources for transmitting the same transport block are also completely the same, thereby realizing synchronization of MBMS content and simplifying the process of MBMS synchronization.

In a possible implementation, the centralization unit sends a second message to the distribution unit, where the second message is used to notify the distribution unit that when a preset condition is currently met, it generates a message for carrying the first The data block of the data information of the business.

For example, when the distribution unit generates a data block, the preset conditions that need to be met include one or more of the following:

The data amount of the received data information of the first service is greater than a preset threshold;

Among the data information to be transmitted for the first service, the delay budget of the data information first received by the distribution unit exceeds the first time threshold;

Among the data information to be transmitted by the first service, the delay budget of the data information first received by the distribution unit, and the difference from the expiration time is less than the first time difference threshold;

Receiving the data information of the first service indicated by the core network device in a merged manner;

The received data information of the first service indicated by the centralized unit in a merged manner;

Optionally, the distribution unit determines whether the preset condition is currently met at time T before each first cell needs radio resources (or uses transmission resources to transmit data). Optionally, T can be determined by the distribution unit according to the protocol, and can be T notified by the distribution unit from the centralized unit. The value unit of T can be a subframe, a time slot, or a time such as milliseconds or microseconds. unit.

In a possible implementation, the distribution unit receives a second message sent by the centralized unit, where the second message is used to notify the distribution unit to generate a message for carrying the first service when a preset condition is met. Data block of data information.

When the distribution unit determines that the preset condition is satisfied, it generates a data block for carrying the data information of the first service.

In this implementation, the centralized unit notifies the distribution unit to generate a data block for carrying the data information of the first service when it is determined that the preset condition is satisfied, so as to ensure that the first service is sent every time between each first cell The data information is the same.

In a possible implementation, the centralized unit determines that there are at least two first services to be merged;

The allocating, by the centralized unit, the transmission resources for transmitting the first service to the at least two second cells, further includes:

The centralized unit determines the transmission sequence of each first service on the transmission resource.

The centralized unit determines the transmission sequence of each first service on the transmission resource, including one or more of the following:

The centralized unit allocates identification information in the transmission resource for each first service;

The centralized unit determines the arrangement sequence of the data information of each first service in the data block;

The centralized unit determines the LCP parameters of each first service.

For example, the identification information of the first service may be a logical channel ID (Logical Channel ID, LCH ID).

For example, the LCP parameters include the guaranteed transmission data volume allocated for each first service in the data block, and/or, for the remaining transmission space in the data block, the data volume occupied by each first service.

In this implementation, there are at least two first services to be combined. By determining the transmission sequence of the data information of each first service on the transmission resource, it is ensured that the first service sent every time between each first cell The data information is exactly the same.

In the second aspect, an MBMS synchronization device is provided. The device provided in the present application has the function of realizing the centralized unit or the distributed unit in the foregoing method, and includes means for executing the steps or functions described in the foregoing method. The steps or functions can be realized by software, or by hardware (such as a circuit), or by a combination of hardware and software.

In a possible design, the foregoing device includes one or more processors and communication units. The one or more processors are configured to support the apparatus to perform corresponding functions of the centralized unit or the distributed unit in the foregoing method.

Optionally, the device may further include one or more memories, where the memory is used for coupling with the processor and stores necessary program instructions and/or data for the device. The one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.

In another possible design, the above device includes a transceiver, a processor, and a memory. The processor is used to control the transceiver or the input/output circuit to send and receive signals, the memory is used to store a computer program, and the processor is used to run the computer program in the memory so that the device executes the first aspect or any one of the first aspect It is possible to realize the method completed by the centralized unit or the distributed unit in the mode.

Optionally, the device may further include one or more memories, where the memories are used for coupling with the processor, and they store necessary program instructions and/or data for the centralized unit or the distributed unit. The one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.

The device may be located in a centralized unit or a distributed unit, or be a centralized unit or a distributed unit.

In another possible design, the above device includes a transceiver, a processor, and a memory. The processor is used to control the transceiver or the input/output circuit to send and receive signals, the memory is used to store a computer program, and the processor is used to run the computer program in the memory, so that the device executes the first aspect or any one of the first aspect. In the implementation mode, the centralized unit or distributed unit completes the method.

In a third aspect, a computer-readable storage medium is provided for storing a computer program, and the computer program includes instructions for executing the first aspect or the method in any one of the possible implementation manners of the first aspect.

In a fourth aspect, a computer program product is provided. The computer program product includes: computer program code, which when the computer program code runs on a computer, causes the computer to execute any one of the first aspect or the first aspect. The method in the possible implementation mode.

Description of the drawings

Figure 1 is a schematic diagram of a cell for data transmission;

Figure 2 is a schematic diagram of a system architecture of a content synchronization process;

FIG. 3 is a schematic diagram of scheduling data with different time stamps in a scheduling period;

FIG. 4 is a schematic diagram of an application scenario to which an embodiment of this application applies;

FIG. 5 is a schematic diagram of an MBMS synchronization process applicable to an embodiment of this application;

FIG. 6 is a schematic diagram of a transmission resource allocation applicable to an embodiment of this application;

FIG. 7 is a schematic diagram of an MBMS synchronization process applicable to an embodiment of this application;

FIG. 8 is a structural diagram of an MBMS synchronization device applicable to an embodiment of this application;

FIG. 9 is a structural diagram of an MBMS synchronization device applicable to an embodiment of this application.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as the fourth generation (4th Generation, 4G), the 4G system includes the long term evolution (LTE) system, and the worldwide interconnection for microwave access (worldwide interoperability). for microwave access, WiMAX) communication systems, future 5th Generation (5G) systems, such as new-generation radio access technology (NR), and future communication systems, such as 6G systems.

This application will present various aspects, embodiments, or features around a system that may include multiple devices, components, modules, etc. It should be understood and understood that each system may include additional devices, components, modules, etc., and/or may not include all the devices, components, modules, etc. discussed in conjunction with the drawings. In addition, a combination of these schemes can also be used.

In addition, in the embodiments of the present application, the term "exemplary" is used to indicate an example, illustration, or illustration. Any embodiment or design solution described as an "example" in this application should not be construed as being more preferable or advantageous than other embodiments or design solutions. Rather, the term example is used to present the concept in a concrete way.

The network architecture and business scenarios described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. Those of ordinary skill in the art will know that with the network With the evolution of architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

Hereinafter, some terms of the embodiments of the present application are explained to facilitate the understanding of those skilled in the art.

1) Terminals, also called user equipment (UE), mobile station (MS), mobile terminal (MT), etc., are devices that provide users with voice and/or data connectivity. For example, handheld devices with wireless connectivity, vehicle-mounted devices, etc. At present, some examples of terminals are: mobile phones (mobile phones), tablets, notebook computers, palmtop computers, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, and augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving (self-driving), wireless terminals in remote medical surgery, and smart grid (smart grid) The wireless terminal in the transportation safety (transportation safety), the wireless terminal in the smart city (smart city), the wireless terminal in the smart home (smart home), etc.

2) A network device is a device in a wireless network. For example, a network device may be a radio access network (RAN) node (or device) that connects a terminal to the wireless network, and may also be called a base station. Currently, some examples of RAN nodes are: continuously evolving node B (gNB), transmission reception point (TRP), evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B, NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (for example, home evolved NodeB, or home Node B, HNB) , Base band unit (BBU), or wireless fidelity (wireless fidelity, Wifi) access point (AP), etc. In addition, in a network structure, the network device may include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node. The RAN equipment including the CU node and the DU node separates the protocol layer of the eNB in the long term evolution (LTE) system. Some of the protocol layer functions are placed under the centralized control of the CU, and some or all of the protocol layer functions are left. Distributed in the DU, the CU centrally controls the DU. For another example, a network device may be a core network (CN) device that provides service support for the terminal. Common core network devices include access and mobility management function (AMF) entities, session management functions ( Session management function (SMF) entities, user plane function (UPF) entities, etc., are not listed here. Wherein, the AMF entity may be responsible for terminal access management and mobility management; the SMF entity may be responsible for session management, such as user session establishment, etc.; the UPF entity may be a functional entity of the user plane, mainly responsible for connecting to external The internet.

3) Centralized unit, also called centralized unit node or control function entity, mainly refers to the centralized control unit of the access network, such as CU (Centralized Unit).

4) Distributed unit, also called distributed unit node or data function entity, mainly refers to the distributed control unit of the access network, such as DU (Distributed Unit).

Among them, the 5G NR system introduces the concepts of centralized unit and distributed unit. For example, it can be understood as dividing the base station into centralized unit and distributed unit according to functions.

5) A cell, also called a cell, is an area covered by a base station or a part of a base station (generally referred to as an area covered by wireless signals). The terminals located in the cell can communicate with the base station through wireless channels.

6) Time-frequency information, including time-domain information and frequency-domain information, used to indicate time-domain resources and/or frequency-domain resources.

Time domain resources include slots, mini-slots, symbols, radio frames, subframes, etc.

Frequency domain resources include sub-channels, bands, carriers, bandwidth parts (Band Width Part, BWP), resource blocks (Resource Block, RB), or resource pools.

The time-frequency information includes slot, mini-slot, symbol or other time-domain granularity (such as system frame, sub-frame).

The time-frequency information may include slot number, subcarrier interval, Cyclic Prefix (CP) length, Transmission Time Interval (TTI) length, radio frame number, subframe number, and so on.

7) The terms "system" and "network" in the embodiments of this application can be used interchangeably. "Multiple" refers to two or more, and other measure words are similar. "And/or" describes the association relationship of the associated object, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone. In addition, for elements in the singular form "a", "an" and "the", unless the context clearly dictates otherwise, it does not mean "one or only one", but means "one or more At one". For example, "a device" means to one or more such devices. Furthermore, at least one (at least one of)..." means one or any combination of subsequent associated objects, for example, at least one of a, b, or c, which can mean : A, b, c, ab, ac, bc or abc, where a, b, c can be single or multiple.

And, unless otherwise stated, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or order of multiple objects. Importance. For example, the first data packet and the second data packet are only for distinguishing different data packets, but do not indicate the difference in content, priority, sending order, or importance of the two data packets.

In order to facilitate the understanding of the embodiments of this application, the application scenarios used in this application are first described.

In the LTE system, MBMS transmission is used to support broadcast services. MBMS is transmitted in the MBSFN mode. The MBSFN mode means that multiple base stations (or cells within a base station) in a certain area transmit exactly the same content in subframes at the same time. Simply put, it is Synchronously transmit at multiple base stations (or cells within the base station) at the same time and at the same frequency, so that after the data sent by each base station reaches the terminal, the terminal cannot distinguish which base station sends the received signal, and the signals sent by multiple base stations The terminal performs superposition to make the signal received by the terminal stronger and the packet loss rate lower.

As shown in Figure 1, there are two cells for data transmission, including cell 1 and cell 2. The frequency and bandwidth of cell 1 and cell 2 are exactly the same, and the boundaries and frame boundaries of each subframe in the time domain are also exactly the same. Both cell 1 and cell 2 use subframe 2 (#2) and subframe 4 (#4) to transmit MBMS service data, and the data content transmitted by cell 1 and cell 2 in subframe 2 is exactly the same, and the data transmitted in subframe 4 The content is also exactly the same. When the terminal receives wireless signals from cell 1 and cell 2 in subframe 2 and/or subframe 4, the terminal may not distinguish which cell the received wireless signal is from, that is, the terminal determines the received wireless signal If the time difference between the two signals is within a preset time range (such as a CP length), the terminal can combine the two signals. For the terminal, the two signals from the two cells are multipath channel signals. If the terminal determines that the time difference between the signals from cell 1 and cell 2 to reach the terminal is within a preset time range, the terminal can determine that the two signals can be combined, and the wireless signal is used to transmit MBMS service data.

Multiple signals from multiple cells can be combined to meet the following conditions: The first condition is that each cell in the multiple cells transmits the same MBMS service data in each subframe. For example, both cell 1 and cell 2 use sub-frames. Frame 2 (#2) and subframe 4 (#4) transmit exactly the same MBMS service data. This requires a content synchronization mechanism to achieve. The second condition is the format in which MBMS service data is processed and sent at the physical layer of the multiple cells They are exactly the same, for example, the modulation and demodulation modes used by each cell are the same, and the radio resources used by each cell for transmission on the air interface are the same.

The system architecture involved in the content synchronization process is shown in Figure 2, including data source (BM-SC node in Figure 2), gateway (MBMS Gateway in Figure 2), base station (eNB in Figure 2), A synchronization (SYNC) protocol entity is added to the terminal (such as the UE in FIG. 2), the MB-SC node and the eNB, where the SYNC protocol is a protocol for synchronizing data, specifically a protocol for synchronizing data used to generate a specific radio frame. The content synchronization process in the system architecture shown in Figure 2 includes: In the BM-SC node, the SYNC protocol entity puts a time stamp on each MBMS packet (hereinafter referred to as a data packet), and the time stamped data packet passes through the MBMS Gateway Send to the eNB. The eNB determines the scheduling period in which each data packet is transmitted according to the time stamp of each data packet. The eNB maps the data packet to the corresponding scheduling cycle according to the value of the time stamp of the data packet. Send the data packet to the UE. The UE determines the data information sent by multiple base stations (or multiple cells) in the same scheduling period as content that can be combined.

The timestamp is a periodic discrete value, and the period is called time sequence (time sequence). The BM-SC node determines the time stamp of each data packet according to the transmission rate of the broadcast service on the air interface. As shown in Fig. 3, the determined time stamp includes T1, T2, T3, and T4. For example, in Figure 3, the sum of the data volume of data packet 6 to data packet 8 (including data packet 6, data packet 7 and data packet 8), data packet 9 to data packet 12 (including data packet 9, data packet 10, data packet 11 and data packet 12) the sum of the data amount, the sum of the data amount of data packet 13 to data packet 14 (including data packet 13 and data packet 14), and the sum of data packet 15 to data packet 16 (including data packet 15 and data packet) The sum of the data volume of packet 16) is basically the same. Therefore, as shown in Figure 3, the SYNC protocol entity has the same time stamp T1 for packet 6, packet 7 and packet 8, which is packet 9, packet 10, Data packet 11 and data packet 12 are marked with the same time stamp T2, data packet 13 and data packet 14 are marked with the same time stamp T3, and data packet 15 and data packet 16 are marked with the same time stamp T4.

Multi-cell/multicast Coordination Entity (MCE) configures a scheduling period for each cell in the MBSFA. For a service, the scheduling period of each cell in an MBSFA is the same, and the scheduling period of cells in different MBSFAs can be different, and the time length of the scheduling period is an integer multiple of time sequence. The eNB maps the data packet to the corresponding scheduling period according to the value of the time stamp of the data packet. As shown in Figure 3, for scheduling mode 1, the length of the scheduling period is the same as time sequence. The eNB transmits data packets with a timestamp of T1 in scheduling period 1A, and transmits data packets with a timestamp of T2 in scheduling period 1B. Data packets with a timestamp of T3 are transmitted in the scheduling period 1C, and data packets with a timestamp of T4 are transmitted in the scheduling period 1D; for scheduling mode 2, the length of the scheduling period is twice the time sequence, and the eNB sets the timestamps as T1 and T2 The data packets of are transmitted in the scheduling period 2A, and the data packets with time stamps of T3 and T4 are transmitted in the scheduling period 2B. In summary, the purpose of content synchronization is to allow each cell to simultaneously transmit the same data packet on the air interface.

In the existing content synchronization mechanism, the transmission content of multiple base stations in multiple cells is consistent. Therefore, it is necessary to add a SYNC protocol entity in the data source and base station. The SYNC protocol entity in the data source determines the time stamp for each data packet, and It is ensured that the transmission time inferred by each cell based on the time stamp is the same, so that each cell transmits the same data packet at the same transmission time, so the process of achieving content synchronization is complicated.

In view of this, in order to simplify the MBMS synchronization process, this application proposes an MBMS synchronization method. In this method, the centralized unit determines the first service to be merged, and determines at least two first cells to merge the first service, and the centralized unit is the at least two second cells that merge the first service. One cell is allocated the same transmission resource, each first cell can use the same allocated transmission resource to transmit the first service, and the terminal can perform data information of the first service transmitted by each first cell through the same transmission resource. Merge to achieve content synchronization. Through this method, the centralized unit allocates the same transmission resource to each first cell that performs the first service combination, and each first cell can transmit the data information of the first service through the same transmission resource, and the data source and the base station are different. A new SYNC protocol entity needs to be added, and the centralized unit is responsible for business consolidation and the allocation of transmission resources, thereby simplifying the content synchronization process.

Figure 4 is a schematic diagram of an application scenario, including UPF. UPF is continuous with the centralized unit (CU shown in Figure 4). One CU can be connected to multiple distributed units (DU1 and DU2 shown in Figure 4). Among them, the CU and DU are connected through the F1 interface, and one DU can be responsible for (or manage) one or more cells. In Figure 4, DU1 manages multiple cells, and DU2 manages one cell. It can be understood that only one example is given in Figure 4. In the actual application scenario, a CU manages a large number of cells (such as several hundred). In this case, the MBMS services transmitted by the cells under one CU are combined. Since the number of cells sending MBMS service data to the terminal is large, and the number of the same MBMS service data sent by different cells received by the terminal is also large, the transmission effect of MBMS service data is also stronger and the packet error rate is lower.

The embodiment of the present application provides an MBMS service synchronization method, which can be applied to the application scenario shown in FIG. 4. The following describes the specific process of the MBMS service synchronization method with reference to Fig. 5. As shown in Fig. 5, the process includes:

Step 501: The centralized unit determines the first service to be merged, and determines at least two first cells to merge the first service.

The centralized unit determines the first service to be merged, where the first service to be merged may be part or all of the second service that is about to start transmission, that is, the first service may be a subset of the second service, or the first service and the The second service is the same, that is, the second service to be transmitted includes the first service, where the number of the first service can be one or more, and the number of the second service can also be one or more.

For example, the centralized unit obtains the second service that is about to start transmission, and determines the first service to be merged among the second services that are about to start transmission.

While acquiring the second service, the centralized unit may also acquire the second cell responsible for transmitting the second service. Generally, there are multiple second cells responsible for transmitting the second service.

Specifically, if the centralized unit obtains multiple second services, the centralized unit obtains the second cell responsible for transmitting each second service.

Among them, the second cell responsible for transmitting the second service can also be understood as the second cell involved in the second service.

For example, the centralized unit obtains the second service and the second cell responsible for transmitting the second service from the core network device. For example, the core network device sends information about the second service and the second cell responsible for transmitting the second service to the centralized unit. . Optionally, the SMF sends the information of the second service and the second cell responsible for transmitting the second service to AMF, and the AMF sends the information of each second service and the second cell responsible for transmitting the second service to the centralized unit. .

The second service is the MBMS service, and the MBMS service includes the Session Service.

For example, four MBMS services are about to start transmission, namely Session A service, Session B service, Session C service and Session D service.

The information of the second service acquired by the centralized unit and the second cell responsible for transmitting the second service can be expressed in the following two ways:

1.1. Take the second business as the key word:

Session A: cell2, cell3;

Session B: cell1, cell2, cell3;

Session C: cell1, cell2;

Session D: cell1, cell3.

Since there are multiple second cells corresponding to each Session service, multiple second cells corresponding to each Session service can also be regarded as a set, that is, each Session service corresponds to a second set of cells.

1.2. Take the second cell as the key word:

Cell1: Session B, Session C, Session D;

Cell2: Session A, Session B, Session C;

Cell3: Session A, Session B, Session D.

There are also multiple Session services corresponding to each second cell. Therefore, multiple Session services corresponding to each second cell can also be regarded as a set, that is, each second cell corresponds to a Session service set.

It can be understood that the cell involved in the embodiment of this application is a cell that participates in the current MBMS service data transmission, and other possible cells that do not participate in the MBMS service data transmission are not described in the embodiment of this application.

The centralized unit decides whether to merge the acquired second business, and if the centralized unit decides to merge the second business, it determines the merged first business, and determines at least two first businesses that merge the first business. cell. Specifically, the centralized unit determines at least two first cells to merge the first service among the second cells responsible for transmitting the first service.

The second business determined by the centralized unit to be merged may be one or more. For example, the centralized unit determines that the second business to be merged is Session B, and other sessions are not merged (hereinafter referred to as merge method 1), or the centralized unit determines that the second business to be merged is Session B and Session C, and other sessions are not merged ( Hereinafter, it will be referred to as merging method 2), or the second service determined by the centralized unit to be merged is Session A and Session B, and other sessions are not merged (hereinafter referred to as merging method 3).

Optionally, the centralized unit can allow as many cells as possible under the same distributed unit to transmit the same service data at the same time, so as to achieve better MBMS service data transmission effect.

After acquiring the second cell responsible for transmitting the second service, the centralized unit can determine at least two first cells to merge the first service. Specifically, the centralized unit determines at least two first cells to merge the first service among the second cells responsible for transmitting the first service.

The at least two first cells that merge the first service may be a subset of the second cell responsible for transmitting the first service, or may be the same as the second cell responsible for transmitting the first service, that is, the first cell is responsible for transmitting the first service. The second cell of the service includes at least two first cells that merge the first service.

Specifically, the centralization unit determines at least the first service to be combined according to the geographic location of each (second) cell and/or the frequency information of each (second) cell in the second cell responsible for transmitting the first service. Two first cells.

For example, the centralized unit determines at least two (second) cells that are geographically adjacent in the second cell responsible for transmitting the first service as the at least two first cells that merge the first service.

For example, the centralized unit determines at least two (second) cells with the same or adjacent frequency point information (for example, the same or adjacent frequency point information) of the second cell responsible for transmitting the first service, as At least two first cells where a service is merged. It is understandable that when the frequency bands of two cells overlap, it can be determined that the two cells combine a certain service, that is, at least two of the first cells that combine the first service determined according to the frequency point information , The frequency bands of every two first cells overlap.

Wherein, at least two first cells merge the first service, which means that each first cell of the at least two first cells transmits the same transmission block including the first service on the air interface, and each first cell The time-frequency resources for transmitting the same transmission block are also exactly the same. One of the transmission blocks is a data block containing a protocol data unit (MAC PDU). Therefore, in the embodiment of this application, the service data and the transmission data contained in the data block are The business data contained in the block is the same.

Also taking the above as an example, in the first merging method, the first cell to merge Session B includes cell1, cell2, and cell3. Optionally, Session C and Session D are transmitted separately in cell1, and are not combined with other session service data, Session A and Session C are transmitted separately in cell2, and not combined with other session service data, Session A and Session D are separately transmitted in cell3 Transmission, not merged with data of other Session services. Specifically, Session services that are transmitted separately and are not combined with the data of other Session services. The transmission of these Session services is determined by their corresponding cells and has nothing to do with other cells. The data of these Sessions can be placed in a transmission block (also called data block). ) Can also be transmitted in different transmission blocks, and there is no restriction here.

In the second merging method, the first cell for merging Session B and Session C includes cell1 and cell2. Optionally, Session D is transmitted separately in cell1 and not combined with data of other session services, Session A is transmitted separately in cell2 and not combined with data of other session services, Session A, Session B, and Session D are transmitted separately in cell3. Merged with data from other Session services.

In the third combination method, the first cell that combines Session A and Session B includes cell2 and cell3. Optionally, Session B, Session C, and Session D are transmitted separately in cell1 and are not combined with data of other session services, Session C is transmitted separately in cell2 and not combined with data of other Session services, and Session D is transmitted separately in cell3. Merged with data from other Session services.

In an implementation manner, the centralized unit allocates a corresponding port number for the first service, and the port number of the first service is used to receive the data information of the first service sent by the core network device.

Specifically, each first cell that combines the first service receives the data of the first service sent by the UPF through the assigned port number.

Specifically, the centralized unit may allocate a corresponding port number for each second service, thereby realizing that the corresponding port number is allocated for the first service, and the port number of the second service is used to receive the data information of the second service sent by the core network.

For example, the centralized unit sends the port number allocated for the second service (including the port number allocated for the first service) to the core network device. Specifically, the centralized unit sends the port number allocated for the second service to the AMF, the AMF sends the port number corresponding to the second service to the SMF, and the SMF sends the port number corresponding to the second service to the UPF.

Optionally, if the core network device determines that each second cell is located under the same distribution unit, it sends Session Start instruction information to the centralized unit. If the centralized unit determines that through admission control (such as deciding to accept the connection request of the user under the second cell), it determines that the acquired radio resources of the second cell can accommodate the corresponding second service, and the centralized unit allocates one for each second service Corresponding to the port number, the centralized unit sends the response message of Session Start Response to the core network device, where the response message may include the port number allocated for each second service.

Step 502: The centralized unit allocates transmission resources for transmitting the first service to the at least two first cells, and sends a first message to the distribution unit where the at least two first cells are located, where the first message is used to notify the At least two first cells use the transmission resources to transmit the first service, wherein the transmission resources allocated to each first cell for transmitting the first service are the same. That is, the centralized unit allocates a set of transmission resources to at least two first cells of the first service to be combined.

The centralized unit allocates the same transmission resources for transmitting the second service to each first cell, which can ensure that each first cell transmits the same transmission block containing the first service on the air interface, and each first cell transmits the same transmission block The time-frequency resources are also exactly the same. In this way, by allowing the cells under the same centralized unit to coordinate as much as possible to send service data, and allowing the cells under the same centralized unit to send broadcast services and send the same data packets at the same time as possible, the synchronization of MBMS service data can be realized. MBSFN merge, the transmission effect of MBMS service data realized is stronger.

Optionally, after determining that the at least two first cells merge the first service, the centralizing unit allocates transmission resources for transmitting the first service to the at least two first cells.

For example, the centralized unit allocates radio resources to at least two first cells, such as including the time for generating radio resource blocks for transmitting the first service (radio resource blocks for transmitting the first service will be abbreviated as radio resource blocks below) Interval, the size of the radio resource block, and the time-frequency information where the radio resource block is located.

Specifically, the centralized unit determines the time interval for transmitting one or more radio resource blocks of the combined first service and the size of the resource-free block according to the data volume and time delay of the first service. Wherein, the delay may be the actual transmission delay, that is, the time difference between the first time point when the distribution unit receives the data information of the first service and the second time point when the terminal receives the data information of the first service, but In practical applications, the actual transmission delay is not easy to obtain, and the delay may also be the maximum delay of the current network transmission, that is, the maximum delay of the current network transmission of data.

Optionally, the time interval of the radio resource block is not greater than (that is, less than or equal to) the time delay. If the time interval of the radio resource block is greater than the time delay, the data information that should be sent within a certain length of time may not be able to be sent, which may cause the data to be unable to be transmitted on time.

For example, suppose the data volume of Session B is 40000Bytes/s (bytes/second), the average packet length is 400Bytes, and the average data packet is every 10ms (milliseconds), and the delay is 80ms. The centralized unit allocates a periodic (or periodic Generated), the time interval for generating the wireless resource block is not greater than the time delay of 80ms. Taking the time interval for generating the wireless resource block as 40ms as an example, that is, the wireless resource block appears once every 40ms, then the wireless resource block is generated every time The distribution unit will receive 40ms/10ms=4 data packets within the time interval of, and the received data volume is 400Bytes*4=1600Bytes, then one wireless resource block can transmit 1600Bytes Session B data information, plus data packets Therefore, the amount of data transmitted in a radio resource block is greater than 1600 Bytes, for example, the amount of data transmitted in a radio resource block is 2000 Bytes.

The time-frequency information of the periodically occurring radio resource blocks determined by the centralized unit includes: the radio frame number and subframe number of the radio resource block in each first cell, that is, the number of the radio resource block in each first cell How many subframes of the radio frame appear, and the index of the sub-band where the radio resource block is located in the first cell, that is, the sub-band is located in the first cell, the BWP identifier and the location identifier in the BWP, and the radio resource block The identifier of the occupied physical resource block (Physical Resource Block, PRB).

Optionally, the time-frequency position of the radio resource block may be continuous or discontinuous. If the time-frequency position of the radio resource block is continuous, the centralized unit determines the start position, end position and the position of the radio resource block. If the time-frequency position of the radio resource block is not continuous, the centralized unit determines the time-frequency position of each radio resource block.

Optionally, the radio frame number and subframe number of each cell are different, and the bandwidth of each cell and the location of each BWP are also different. When the centralized unit determines the periodically occurring radio resource blocks, because each cell has a different bandwidth, The location of the BWP is also different, so the relative position of the frequency band of the radio resource block in each cell is also different (that is, the index of the sub-band is different), so when the centralized unit sends the first message to the distribution unit, each indicated in the first message The specific information of the radio resources in the transmission resources of the cells may be different, but the absolute time-frequency positions of the radio resource blocks in each cell are the same.

Taking cell1 and cell2 in the above merging method one for description, it can be understood that in the above merging method one, it should be ensured that the time-frequency resources of cell3 and cell1 and cell2 are the same, which is not repeated here. The radio resources allocated by the centralized unit for cell1 and cell2 to transmit Session B are shown in Figure 6. The radio resource blocks appear every 40ms in cell1 and cell2, that is, the generated radio resource blocks used to transmit Session B The time interval is 40ms. In terms of time domain resources, the radio resource block used to transmit Session B in cell1 appears in subframe No. 1 of radio frame No. 36 (the black filled part shown in Figure 6), and subframe No. 1 of radio frame No. 40 ( 6) and the 1st subframe of the No. 44 radio frame (not shown in Fig. 6), the radio resource block used to transmit Session B in cell2 appears in the 3rd subframe of the 240th radio frame (as shown in Fig. 6) The black filled part shown), the third subframe of the 244 radio frame (not shown in Figure 6) and the first subframe of the 248 radio frame (not shown in Figure 6), in the frequency domain, the frequency of cell1 The starting point of the domain is F1, the starting position of the frequency domain resource occupied by the radio resource block of the 1st subframe of the 36th radio frame is F1+Δ, and the frequency domain starting point of the cell 2 is F2, which appears in the 240th radio The start position of the frequency domain resources occupied by the radio resource block of the 3rd subframe of the frame is F2+δ. As long as the centralized unit guarantees F1+Δ=F2+δ, it can ensure that the two cells are sending the data information of the first service. The location of the time-frequency resource used at time is the same.

Optionally, the first message sent by the centralized unit to the distribution unit may also include a radio network temporary identity (RNTI). The RNTI indicates that the distribution unit uses a physical downlink control channel (PDCCH) Which RNTI sends the DCI corresponding to the data information of the first service.

Wherein, each of the at least two first cells that merge the first service may use the same RNTI or different RNTIs.

In an implementation manner, the centralized unit also sends a second message to the distribution unit, the second message is used to notify the distribution unit that when it is determined that the preset condition is met, it generates a data block for carrying data information of the first service, To ensure that the data information of the first service sent every time between each first cell is the same.

2.1. The data volume of the received data information of the first service is greater than a preset threshold.

2.2. Among the data information to be transmitted by the first service, the delay budget of the data information first received by the distribution unit exceeds the first time threshold.

2.3. Among the data information to be transmitted by the first service, the delay budget of the data information first received by the distribution unit, and the difference from the expiration time is less than the first time difference threshold.

Optionally, the expiration time may be a pre-configured expiration time (such as a pre-configured time point), or may be a pre-configured expiration period (such as a pre-configured time length).

2.4. The information indicating that the packet loss rate of the data information of the first service indicated by the core network device is lower than the first packet loss rate threshold is received. That is, in this mode, the core network equipment indicates that the packet loss rate of the data information of the first service cannot be too high. That is to say, the data information of the first service is of higher importance and needs to be transmitted in a combined manner to reduce the packet loss rate. .

2.5. The data information of the first service indicated by the core network device is received and transmitted in a combined manner.

2.6. The received data information of the first service indicated by the centralized unit adopts information in a merged manner.

Optionally, at time T before each first cell needs radio resources (or uses transmission resources to transmit data), the distribution unit determines whether the preset conditions are currently met, and may use one of the above methods 2.1 to 2.6 Or multiple determinations to meet preset conditions. Optionally, T can be determined by the distribution unit according to the protocol, and can be T notified by the distribution unit from the centralized unit. The value unit of T can be a subframe, a slot, or milliseconds or microseconds. Equal time unit.

Taking 2.1 as an example, for a set of transmission resources, if the first service to be combined is one, the distribution unit determines whether the data volume of the received data information of the first service is greater than the preset threshold. ; If there are at least two second services to be combined, the distribution unit determines whether the sum of the received data information of the at least two services is greater than a preset threshold. For multiple sets of transmission resources, the distribution unit separately determines the first service corresponding to each set of transmission resources.

In another implementation manner, the centralized unit determines that there are at least two first services to be combined (as shown in the above-mentioned combination mode 2 and combination mode 3), wherein the at least two first services are combined At least two of the first cells are the same.

The centralization unit also determines the transmission sequence of each first service on the transmission resource, where the transmission resource is the transmission resource allocated above for transmitting the first service.

Specifically, the central unit determines the transmission sequence of each first service on the transmission resource, including one or more of the following:

3.1. The centralized unit allocates identification information in the transmission resource for each first service.

The identification information in the transmission resource allocated for each first service is the identification information of the first service included in the data block when the data block is generated by the distribution unit.

It is understandable that if only one first service is transmitted for each set of transmission resources, there is no need to allocate identification information for that one first service. If each set of transmission resources transmits multiple first services, then each set of transmission resources can be used for each first service. The first service is allocated LCH ID. Optionally, for different transmission resources, in different transmission resources, the LCH IDs corresponding to different services may be the same.

3.2. The centralized unit determines the sequence of data information of each first service in the data block.

Take the above merging method 2 as an example. In merging method 2, Session B and Session C are merged, so the centralized unit can determine whether the data information of Session B in the data block is placed before Session C, or whether the data of Session B is placed After the information is placed as Session C, the order of the data information of each first service in the data block is determined.

For example, the centralized unit determines the arrangement order according to the priority of each first service, or the centralized unit determines the arrangement order according to the identifier of each first service.

3.3. The centralized unit determines the logical channel priority (Logical Channel priority, LCP) parameter of each first service.

The LCP parameters include the guaranteed transmission data volume allocated for each first service in the data block, including how many bytes of data are allocated for each first service in the first round of scheduling.

For the remaining transmission space, the amount of data occupied by each first service includes how much data is used in each first service to divide the remaining transmission space. Taking the above combination method 2 as an example, for example, when the remaining 300 bytes of transmission space in the data block is not occupied, the LCP parameter may indicate that 200 bytes in Session B and 100 bytes in Session C occupy the remaining 300 bytes in the data block.

Optionally, when how much data is used in each first service to divide the remaining transmission space in the data block, 3.2 can be combined to determine the sequence of each first service in the data block.

Step 503: The distribution unit receives the first message.

The distribution unit receives the first message, and determines that at least two first cells under the distribution unit use the allocated transmission resources to transmit the first service, that is, determine the transmission resources used to transmit the first service.

Wherein, the transmission resource used to transmit the first service includes the time interval of the wireless resource block used to transmit the first service, the size of the wireless resource block, and the time-frequency information where the wireless resource block is located.

In an implementation manner, the distributing unit may also receive the second message, and determine to generate a data block for carrying data information of the first service when a preset condition is met.

Optionally, there are at least two first services to be combined; the transmission resource used to transmit the first service further includes: the transmission sequence of each first service on the transmission resource.

The transmission sequence of each first service on the transmission resource includes one or more of the following:

Allocating identification information in the transmission resource for each first service;

Determine the sequence of data information of each first service in the transmission block;

Determine the LCP parameters of each first service.

Step 504: The distribution unit receives the data information of the first service, generates a data block for carrying the data information of the first service, uses the transmission resource allocated for each first cell to transmit the first service, and transmits the generated data. data block.

Specifically, when a preset condition is met, the distribution unit generates a data block for carrying data information of the first service. The distribution unit may use one or more of the aforementioned methods 2.1 to 2.6 to determine whether the preset condition is met.

Optionally, the distribution unit determines whether a preset condition is met at time T before each set of transmission resources is used.

For example, when the distribution unit determines that the received data information of the first service is greater than the preset threshold value, it generates a data block for carrying the data information of the first service from the received data information of the first service, where if There are multiple first services, and according to the transmission sequence determined in any one of the foregoing manner 3.1 to manner 3.3, the received data information of the first service is generated into a data block used to carry the data information of the first service.

Specifically, the distribution unit sends the generated data block to the terminal through the transmission resource allocated to each first cell for transmitting the first service, where the terminal is a terminal located under the coverage of each first cell.

For example, the distribution unit uses a predefined transmission parameter, and sends the generated data block to the terminal through the transmission resource allocated for each first cell to transmit the first service. Optionally, the transmission parameter may be a transmission parameter predefined by the distribution unit. Among them, the transmission parameters may include Modulation and Coding Scheme (MCS), code rate, and so on.

It should be noted that the method provided in the embodiments of this application cannot be used to transmit MAC CE, nor can it be used to transmit data of other services that do not participate in the merger, nor can it be used to transmit services corresponding to other sets of radio resources. The merged transmission block is not filled with merged service data, nor can it be used to transmit other service data.

On the basis of FIG. 4 to FIG. 6, referring to FIG. 7, the specific process of the MBMS synchronization method is described in detail. As shown in Figure 4, the process includes:

Step 701: The SMF sends MBMS Session Start (MBMS session start) information to AMF, where the MBMS Session Start information includes information about the second service to be transmitted and the second cell responsible for transmitting the second service.

Information about the second service to be transmitted and the second cell responsible for transmitting the second service includes:

Session A: cell2, cell3;

Session B: cell1, cell2, cell3;

Session C: cell1, cell2;

Session D: cell1, cell3.

Step 702: The AMF receives the MBMS Session Start information, and sends the MBMS Session Start information to the CU.

Step 703: The CU receives the MBMS Session Start information, allocates a port number for each second service, and sends the MBMS Session Start Response information to the AMF, where the MBMS Session Start Response information includes the port number allocated for each second service.

For example, the port number includes a GPRS Tunneling Protocol (GPRS Tunnelling Protocol, GTP) port number, that is, GTP-U ports.

Specifically, the port number allocated for each second service is GTP-U ports of session A/B/C/D.

Step 704: The AMF receives the MBMS Session Start Response (MBMS session start response) information, and sends the port number allocated for each second service to the SMF.

Step 705: SMF receives the port number allocated for each second service, and sends the port number allocated for each second service to UPF.

Step 706: The CU determines the merging method (including the first service to be merged and at least two first cells that merge the first service), and allocates transmission resources for transmitting the first service to the at least two first cells.

The transmission resources allocated to the at least two first cells for transmitting the first service are the same.

Combination method 1: The second service to be combined is Session B, and the first cell to combine Session B includes cell1, cell2, and cell3, and the same Session B transmission resources are allocated to cell1, cell2, and cell3.

Merging method 2: The second service to be merged is Session B and Session C, and the first cell that merges Session B and Session C includes cell 1 and cell 2, and cell 1 and cell 2 are allocated the same Session B and Session C transmission resources.

Combination method 3: The second services to be combined are Session A and Session B, and the first cell that combines Session A and Session B includes cell 2 and cell 3, and cell 2 and cell 3 are allocated the same Session A and Session B transmission resources.

Step 707: The CU sends the first message to the DU where the at least two first cells are located, and the first message is used to notify the at least two first cells to use the allocated transmission resources to transmit the first service.

On the basis of FIG. 4 to FIG. 7, the embodiment of the application describes the MBMS synchronization method of the embodiment of the application in detail. Based on the same inventive concept as the foregoing MBMS synchronization method, the embodiment of the application also provides an MBMS synchronization device. As shown in FIG. 8, the MBMS synchronization device 800 includes a processing unit 801 and a transceiving unit 802, and the device 800 can be used to implement the method described in the foregoing method embodiment applied to a centralized unit or a distributed unit. The apparatus 800 may be located in a centralized unit or a distributed unit, or may be a centralized unit or a distributed unit.

It should be noted that the device in the foregoing embodiment, that is, the device 800, may be a centralized unit or a distributed unit, and may also be a chip applied to a centralized unit or a distributed unit, or other combination devices with the functions of the foregoing centralized unit or distributed unit. , Components, etc. When the device is a centralized unit or a distributed unit, the transceiver unit may be a transceiver, which may include an antenna and a radio frequency circuit, etc., and the processing module may be a processor, such as a central processing unit (CPU). When the device is a component having the functions of the above-mentioned centralized unit or distributed unit, the transceiver unit may be a radio frequency unit, and the processing module may be a processor. When the device is a chip system, the transceiver unit may be an input/output interface of the chip system, and the processing module may be a processor of the chip system.

In one embodiment, the device 800 is applied to a centralized unit.

Specifically, the processing unit 801 is configured to obtain a first service to be merged, and to determine at least two first cell cells to merge the first service; to allocate and transmit the first cell to the at least two first cells A service transmission resource;

The transceiver unit 802 is configured to send a first message to the distribution unit where the at least two first cells are located, where the first message is used to notify the at least two first cells to use the transmission resource to transmit the first message Services, where the transmission resources allocated to each first cell for transmitting the first service are the same.

In an implementation manner, the processing unit 801 is further configured to allocate a port number for the first service, where the port number of the first service is used to receive data information of the first service sent by a core network device.

In an implementation manner, the processing unit 801 is specifically configured to determine at least two first services that combine the first service according to the geographic location of each cell in the second cell and/or the frequency point information of each cell. cell, the second cell is a cell responsible for transmitting the first service, and the second cell includes the at least two first cells.

In an implementation manner, the processing unit 801 is specifically configured to determine the time interval for generating the radio resource block for transmitting the first service, and the size of the radio resource block; determine the time frequency where the radio resource block is located information.

In an implementation manner, the processing unit 801 is further configured to send a second message to the distribution unit, where the second message is used to notify the distribution unit when the data volume of the data information of the first service received is greater than When the preset threshold value is set, a data block for carrying data information of the first service is generated.

In an implementation manner, the processing unit 801 is further configured to determine that the first services to be merged are at least two, and determine the transmission sequence of each first service on the transmission resource.

In an implementation manner, the processing unit 801 is specifically configured to determine the transmission sequence of each first service on the transmission resource, including one or more of the following:

Determine the arrangement sequence of the data information of each first service in the data block;

Determine the logical channel priority LCP parameter of each first service.

In another embodiment, the device 800 is applied to a distribution unit.

The transceiver unit 802 is configured to receive a first message sent by a centralized unit, where the first message is used to notify at least two first cells under the distribution unit to use the allocated transmission resources to transmit the combined first service, where each The transmission resources allocated by the two second cells for transmitting the first service are the same.

The processing unit 801 is configured to determine the transmission resources allocated to the at least two first cell cells under the distribution unit for transmitting the combined first service.

In an implementation manner, the transmission resource used to transmit the first service includes: a time interval for generating a radio resource block for transmitting the first service, the size of the radio resource block, and the radio resource block The time-frequency information of the location.

In one implementation, the transceiver unit 802 is further configured to receive a second message sent by the centralized unit, where the second message is used to notify the distribution unit of the data volume of the data information of the first service received When it is greater than the preset threshold value, a data block used to carry the data information of the first service is generated.

In an implementation manner, the processing unit 801 is further configured to: when it is determined that the data volume of the received data information of the first service is greater than the threshold value, generate data information for carrying the first service data block.

In an implementation manner, there are at least two first services to be combined; the transmission resource used to transmit the first service further includes: a transmission sequence of each first service on the transmission resource.

In an implementation manner, the transmission sequence of each first service on the transmission resource includes one or more of the following:

Determine the link control protocol LCP parameters of each first service.

It should be noted that the division of modules in the embodiments of this application is illustrative, and is only a logical function division. In actual implementation, there may be other division methods. In addition, each functional unit in each embodiment of this application It can be integrated in one processing unit, or it can exist alone physically, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including a number of instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

Based on the same concept as the aforementioned MBMS synchronization method, as shown in FIG. 9, an embodiment of the present application also provides a schematic structural diagram of an MBMS synchronization apparatus 900. The apparatus 900 may be used to implement the method described in the foregoing method embodiment applied to a centralized unit or a distributed unit, and reference may be made to the description in the foregoing method embodiment. The apparatus 900 may be in a centralized unit or a distributed unit or be a centralized unit or a distributed unit.

The device 900 includes one or more processors 901. The processor 901 may be a general-purpose processor or a special-purpose processor. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processor can be used to control communication devices (such as base stations, terminals, or chips, etc.), execute software programs, and process software program data. The communication device may include a transceiving unit to implement signal input (reception) and output (transmission). For example, the transceiver unit may be a transceiver, a radio frequency chip, or the like.

The device 900 includes one or more processors 901, and the one or more processors 901 can implement the method of a centralized unit or a distributed unit in the above-mentioned embodiment.

Optionally, the processor 901 may also implement other functions in addition to implementing the methods in the above-mentioned embodiments.

Optionally, in one design, the processor 901 may execute instructions to make the device 900 execute the method described in the foregoing method embodiment. The instructions may be stored in the processor in whole or in part, such as the instruction 903, and may also be stored in the memory 902 coupled to the processor in whole or in part, such as the instruction 904, or the

instructions

903 and 904 may be used together to make The apparatus 900 executes the method described in the foregoing method embodiment.

In another possible design, the communication device 900 may also include a circuit, and the circuit may implement the functions of the centralized unit or the distributed unit in the foregoing method embodiment.

In another possible design, the device 900 may include one or more memories 902, on which instructions 904 are stored, and the instructions may be executed on the processor, so that the device 900 executes the above method The method described in the examples. Optionally, data may also be stored in the memory. The optional processor may also store instructions and/or data. For example, the one or more memories 902 may store the corresponding relationship described in the foregoing embodiment, or related parameters or tables involved in the foregoing embodiment. The processor and memory can be provided separately or integrated together.

In another possible design, the device 900 may further include a transceiver 905 and an antenna 906. The processor 901 may be referred to as a processing unit, which controls a device (terminal or base station). The transceiver 905 may be called a transceiver, a transceiver circuit, or a transceiver, etc., and is used to implement the transceiver function of the device through the antenna 906.

It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The aforementioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM) ) And Direct Rambus RAM (DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

The embodiment of the present application also provides a computer-readable medium on which a computer program is stored. When the computer program is executed by a computer, the operator information update described in any method embodiment applied to a centralized unit or a distributed unit is realized Methods.

The embodiments of the present application also provide a computer program product that, when executed by a computer, implements the MBMS synchronization method described in any method embodiment applied to a centralized unit or a distributed unit.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server, or data center via wired (for example, coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a high-density digital video disc (Digital Video Disc, DVD)), or a semiconductor medium (for example, a solid state disk (Solid State Disk, SSD)) etc.

An embodiment of the present application also provides a processing device, including a processor and an interface; the processor is configured to execute the MBMS synchronization method described in any method embodiment applied to a centralized unit or a distributed unit.

It should be understood that the foregoing processing device may be a chip, and the processor may be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software, At this time, the processor may be a general-purpose processor, which is implemented by reading the software code stored in the memory, and the memory may be integrated in the processor, may be located outside the processor, and exist independently.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two, in order to clearly illustrate the hardware and software Interchangeability. In the above description, the composition and steps of each example have been generally described in terms of function. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which is not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or integrated. To another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present application.

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

Through the description of the foregoing implementation manners, those skilled in the art can clearly understand that this application can be implemented by hardware, firmware, or a combination thereof. When implemented by software, the above functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium. Computer-readable media include computer storage media and communication media, where communication media includes any media that facilitates the transfer of computer programs from one place to another. The storage medium may be any available medium that can be accessed by a computer. Take this as an example but not limited to: computer readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or can be used to carry or store instructions or data structures The desired program code and any other medium that can be accessed by the computer. In addition. Any connection can suitably become a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , Fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, wireless and microwave are included in the fixing of the media. As used in this application, Disk and disc include compact discs (CD), laser discs, optical discs, digital versatile discs (DVD), floppy discs and Blu-ray discs. Disks usually copy data magnetically, while discs The laser is used to optically copy data. The above combination should also be included in the protection scope of the computer-readable medium.

In short, the above descriptions are only preferred embodiments of the technical solutions of the present application, and are not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

A MBMS synchronization method for multimedia broadcast and multicast services is characterized in that it includes:

The centralized unit obtains the first service to be merged, and determines at least two first cell cells to merge the first service;

The centralized unit allocates transmission resources for transmitting the first service to the at least two first cells, and sends a first message to the distribution unit where the at least two first cells are located, where the first message is used for notification The at least two first cells use the transmission resources to transmit the first service, and the transmission resources allocated to each first cell for transmitting the first service are the same.
The method according to claim 1, wherein the determining at least two first cells for merging the first service comprises:

The centralized unit determines at least two first cells that merge the first service according to the geographic location of each cell in the second cell and/or the frequency point information of each cell, and the second cell is responsible A cell that transmits the first service, and the second cell includes the at least two first cells.
The method according to any one of claims 1 or 2, wherein the central unit allocates transmission resources for transmitting the first service to the at least two first cells, comprising:

Determining, by the centralized unit, a time interval for generating a radio resource block for transmitting the first service, and the size of the radio resource block;

The centralized unit determines the time-frequency information where the radio resource block is located.
The method according to any one of claims 1-3, wherein the method further comprises:

The centralizing unit sends a second message to the distribution unit, where the second message is used to notify the distribution unit to generate when the data volume of the received data information of the first service is greater than a preset threshold value. A data block used to carry data information of the first service.
The method according to any one of claims 1 to 4, wherein the centralized unit determines that there are at least two first services to be merged;

The allocating, by the centralized unit, the transmission resources for transmitting the first service to the at least two second cells, further includes:

The centralized unit determines the transmission sequence of each first service on the transmission resource.
The method according to claim 5, wherein the central unit determines the transmission sequence of each first service on the transmission resource, including one or more of the following:

The centralized unit allocates identification information in the transmission resource for each first service;

The centralized unit determines the arrangement sequence of the data information of each first service in the data block;

The centralized unit determines the logical channel priority LCP parameter of each first service.
The method according to any one of claims 1-6, wherein the method further comprises:

The port number allocated by the centralization unit for the first service, where the port number of the first service is used to receive data information of the first service sent by a core network device.
A MBMS synchronization method for multimedia broadcast and multicast services is characterized in that it includes:

The distribution unit receives a first message sent by the centralized unit, where the first message is used to notify at least two first cells under the distribution unit to use the allocated transmission resources to transmit the combined first service. The transmission resources allocated by the two cells for transmitting the first service are the same.
The method according to claim 8, wherein the transmission resource used to transmit the first service comprises: generating a time interval of a radio resource block used to transmit the first service, and the size of the radio resource block , And the time-frequency information where the radio resource block is located.
The method according to claim 8 or 9, wherein the method further comprises:

The distribution unit receives a second message sent by the centralization unit, where the second message is used to notify the distribution unit that when the data volume of the received data information of the first service is greater than a preset threshold, Generate a data block for carrying data information of the first service.
The method of claim 10, wherein the method further comprises:

When it is determined that the data volume of the received data information of the first service is greater than the threshold value, the distribution unit generates a data block for carrying the data information of the first service.
The method according to any one of claims 8-11, wherein there are at least two first businesses to be merged;

The transmission resource used to transmit the first service further includes: a transmission sequence of each first service on the transmission resource.
The method according to claim 12, wherein the transmission sequence of each first service on the transmission resource comprises one or more of the following:

Allocating identification information in the transmission resource for each first service;

Determine the sequence of data information of each first service in the transmission block;

Determine the link control protocol LCP parameters of each first service.
A multimedia broadcast multicast service MBMS synchronization device is characterized in that it comprises:

The processing unit is configured to obtain the first service to be merged, and determine at least two first cell cells to merge the first service; to allocate and transmit the transmission of the first service to the at least two first cells Resources;

The transceiver unit is configured to send a first message to the distribution unit where the at least two first cells are located, where the first message is used to notify the at least two first cells to use the transmission resource to transmit the first service , Wherein the transmission resources allocated to each first cell for transmitting the first service are the same.
The apparatus according to claim 14, wherein the processing unit 801 is further configured to determine the correctness of the first cell according to the geographic location of each cell in the second cell and/or the frequency point information of each cell At least two first cells where services are merged, the second cell is a cell responsible for transmitting the first service, and the second cell includes the at least two first cells.
The apparatus according to claim 14 or 15, wherein the processing unit is specifically configured to determine a time interval for generating a radio resource block for transmitting the first service, and the size of the radio resource block; Determine the time-frequency information where the radio resource block is located.
The device according to any one of claims 14-16, wherein the processing unit is further configured to send a second message to the distribution unit, and the second message is used to notify the distribution unit when receiving When the data volume of the data information of the first service is greater than the preset threshold value, a data block for carrying the data information of the first service is generated.
The apparatus according to any one of claims 14-17, wherein the processing unit is further configured to determine that the first business to be merged is at least two, and to determine that each first business is in place. The transmission sequence on the transmission resource.
The device according to claim 18, wherein the processing unit is specifically configured to determine the transmission sequence of each first service on the transmission resource, including one or more of the following: The identification information of the first service allocated in the transmission resource; determine the sequence of the data information of each first service in the data block; determine the logical channel priority LCP parameter of each first service.
The device according to any one of claims 14-19, wherein the processing unit is further configured to allocate a port number for the first service, wherein the port number of the first service is used for receiving core Data information of the first service sent by the network device.
A multimedia broadcast multicast service MBMS synchronization device is characterized in that it comprises:

The transceiver unit is configured to receive a first message sent by the centralized unit, where the first message is used to notify at least two first cells under the distribution unit to use the allocated transmission resources to transmit the combined first service, where each The transmission resources allocated by the second cell for transmitting the first service are the same;

The processing unit is configured to determine the transmission resources allocated to the at least two first cell cells under the distribution unit for transmitting the combined first service.
The apparatus according to claim 21, wherein the transmission resource used to transmit the first service comprises: generating a time interval of a radio resource block used to transmit the first service, and the size of the radio resource block , And the time-frequency information where the radio resource block is located.
The device according to claim 21 or 22, wherein the transceiver unit is further configured to receive a second message sent by the centralized unit, and the second message is used to notify the distribution unit of the When the data volume of the data information of the first service is greater than the preset threshold value, a data block for carrying the data information of the first service is generated.
The device according to any one of claims 21-23, wherein the processing unit is further configured to: when it is determined that the data amount of the received data information of the first service is greater than the threshold value, Generate a data block for carrying data information of the first service.
The device according to any one of claims 21-24, wherein there are at least two first services to be merged;

The transmission resource used to transmit the first service further includes: a transmission sequence of each first service on the transmission resource.
The apparatus according to claim 25, wherein the transmission sequence of each first service on the transmission resource comprises one or more of the following:

Allocating identification information in the transmission resource for each first service;

Determine the sequence of data information of each first service in the transmission block;

Determine the link control protocol LCP parameters of each first service.
A multimedia broadcast multicast service MBMS synchronization device, characterized in that it comprises a processor and a memory, and the processor is coupled with the memory;

Memory, used to store computer programs;

The processor is configured to execute the computer program stored in the memory, so that the device executes the method according to any one of claims 1-13.
A computer-readable storage medium, characterized by comprising a program or instruction, when the program or instruction runs on a computer, the method according to any one of claims 1-13 is executed.
A computer program product, characterized by comprising a program or instruction, when the program or instruction runs on a computer, the method according to any one of claims 1-13 is executed.
A chip, characterized in that the chip is coupled with a memory, and is used to read and execute program instructions stored in the memory to execute the method according to any one of claims 1-13.