WO2010054572A1

WO2010054572A1 - Method for selecting subframes of single-cell transmission of multimedia broadcast multicast service

Info

Publication number: WO2010054572A1
Application number: PCT/CN2009/074468
Authority: WO
Inventors: 苟伟; 王斌; 毕峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2008-11-14
Filing date: 2009-10-15
Publication date: 2010-05-20
Also published as: CN101742412A; CN101742412B

Abstract

A method for selecting subframes of single-cell transmission of Multimedia Broadcast Multicast Service (MBMS) is provided by the present invention. The method includes: the base station only uses subframes that cannot be used for multi-cell transmission of MBMS service to transmit single-cell MBMS service; or when the subframes that cannot be used for multi-cell transmission of MBMS service are not enough for the base station to transmit single-cell MBMS service, it is judged if subframes that are not used for multi-cell transmission of MBMS service are present, and if present, subframes that are not used for multi-cell transmission of MBMS service are selected to transmit single-cell MBMS service. Using the method of the present invention, the conflict of the subframe configuration is avoided when single-cell transmission of MBMS service and multi-cell transmission of MBMS service are performed. The schedule of the resources of MBMS service in the whole system is more convenient, the schedule of the resources is favorable to be implemented when multi-cell transmission of MBMS service is performed, and the high efficiency of the whole MBMS system is implemented.

Description

Subframe selection method for multimedia broadcast multicast service transmitted by single cell

Technical field

The present invention relates to an LTE (Long Term Evolution) system, and more particularly to a subframe selection method of a Multimedia Broadcast Multicast Service (MBMS) for single-cell transmission.

Background technique

With the rapid development of the Internet and the popularity of large-screen multi-function mobile phones, a large number of mobile data multimedia services and various high-bandwidth multimedia services have emerged, such as video conferencing, television broadcasting, video on demand, advertising, online education, interactive games, and the like. This aspect meets the rising business needs of mobile users and brings new business growth points to mobile operators. These mobile data multimedia services require multiple users to receive the same data at the same time, and have the characteristics of large data volume, long duration, and delay sensitivity compared with general data services.

In order to effectively utilize mobile network resources, 3rd Generation Partnership Project ( 3rd Generation

The Partnership Project (3GPP) proposes the MBMS service, which is a technology for transmitting data from one data source to multiple targets, realizing the sharing of resources (including core network and access network) and improving network resources. Utilization of (especially air interface resources). MBMS defined by 3GPP can not only realize plain text low-rate message class multicast and broadcast, but also realize high-speed multimedia service broadcast and multicast, providing a variety of rich video, audio and multimedia services, which undoubtedly conforms to future mobile The trend of data development provides a better business prospect for the development of 3G.

In LTE, MBMS service transmission is divided into single cell transmission and multi-cell transmission. The single-cell transmission is characterized in that each cell separately transmits an MBMS service, and the MBMS services of each cell do not need to be strictly synchronized, and no air interface data is merged, and the MBMS transmission channel and the MBMS control channel are mapped to the downlink shared channel, and the resource scheduling of the service is performed by The base station completes itself. The multi-cell transmission is characterized in that each cell synchronously transmits an MBMS service, and the MCE (Multi-cell/Multicast Coordination Entity) uniformly coordinates and configures resources of each cell to ensure participation in multi-cell transmission. The air interface data sent by each cell is completely the same, that is, each The cell uses the same time-frequency resource to simultaneously send the same MBMS service content to implement air interface merging of MBMS service data of each cell.

As shown in FIG. 1 , the frame structure of LTE is determined. Currently, LTE has determined the subframe resources used by the MBMS service in multi-cell transmission, for example, FDD (Frequency Division Duplex) mode, subframe #4. And subframe #9, because there is a possibility of sending a paging message, in order to reduce the difficulty of MCE configuration resources, it is prescribed that #4, #9 cannot be used to transmit MBMS services for multi-cell transmission. Among them, #0 and #5 are not required to transmit MBMS services for multi-cell transmission due to the transmission of system information, because the resource conflict between the system message itself and its reference signal and the reference signal of the multi-cell transmission MBMS, #0, #5 also has the possibility of sending a paging message, the possibility is less than #4, #9 is less likely to send a paging message.

The following is a detailed explanation of why the MBMS service cannot be sent by #4, #9, #0, #5 in the FDD mode when transmitting MBMS services in multiple cells in LTE.

As shown in FIG. 2, it is a schematic diagram of a multi-cell transmission MBMS service. Each cell in FIG. 2 participates in multi-cell transmission MBMS service, and the subframe resources used by these cells to transmit MBMS services are uniformly allocated by the MCE, and each cell is allocated. The resources allocated must be consistent. In LTE, #4, #9, #0, #5 are subframes for potentially sending paging messages, and which subframes are specifically transmitted by the base station according to the number of users in the cell. At this time, the MCE that configures the multi-cell transmission MBMS service resource and the base station that configures the cell paging subframe are not the same decision maker, and this will cause a contradiction in the process of configuring resources. For example, #4 is being configured to transmit MBMS services by the MCE. Suddenly, the number of users in a certain cell increases. The base station configures #4, #9 to send paging messages. Since the multi-cell transmission MBMS service is uniformly scheduled, due to one The base station configures #4 as a paging subframe, and each cell in the entire area cannot use the #4 to transmit the multi-cell MBMS service, which affects the transmission of the multi-cell transmission MBMS service. Therefore, in LTE, in order to facilitate management scheduling, it is directly specified that the potential paging subframe cannot transmit the MBMS service of the multi-cell transmission mode. The potential paging subframes in LTE are: FDD mode, #0, #4, #5, #9; TDD (Time Division Duplex) mode, #0, #1, #5, #6. The configuration of specific potential paging subframes is shown in Table 1 and Table 2.

FDD paging subframe configuration table Ns PO when is=0 PO when is=l PO when is=2 PO when is=3

1 9 N/A N/A N/A

2 4 9 N/A N/A

4 0 4 5 9

TDD paging subframe configuration table

In the table, PO (Paging Occasion) can be understood as a paging subframe, that is, the paging occasion of the UE is on the subframe. The i-s is a value calculated by the UE according to its own UE-ID (identity) and the paging configuration parameters of the system. Ns in the table is an intermediate parameter, which means the number of paging subframes configured in a radio frame. For example, when the base station sets Ns=2, it indicates that the subframe #4 in FDD mode, #9 is to send a paging message, #0 and #5 do not send a paging message; in the TDD mode, subframe #0, #5 sends a paging message. , #1 and #6 do not send paging messages. As can be seen from the table, subframe #9 in FDD mode is always used to send paging information, and subframe #0 in TDD mode is always used to send paging information.

Note that when a paging message is sent, the paging message can be multiplexed with other services in one subframe.

In the prior art, since the single cell transmission MBMS is not differentiated by the subframe level, the resource allocation of the multi-cell transmission and the single cell transmission is different, and the subframe allocation may be collided, thereby transmitting the MBMS band to the multi-cell. Come to a big impact.

The reason for the large multi-cell transmission MBMS is caused by the characteristics of multi-cell transmission. The multi-cell transmission MBMS service requires strict inter-cell synchronization, and each cell allocates the same frequency resource, and transmits the same data content at the same time, and ensures that the air interface data sent by each cell at the same time is completely consistent. Therefore, in LTE, the MCE is the same for participating in multi-cell transmission. Each cell uniformly allocates resources. This potentially requires that each cell must have the same resources available.

MCE allocation.

Since the prior art does not limit the single cell transmission subframe, it will generate: As shown in FIG. 3, it is a schematic diagram of a multi-cell transmission MBMS, and we assume that the cells a, b, and c have a single cell MBMS. It may be assumed that cell a transmits a single cell MBMS service on subframe #8, cell b transmits a single cell MBMS service on subframe #7, and cell c transmits a single cell MBMS service on subframe #6, at which time MCE is When allocating subframe resources to multiple cells, you need to consider the available common resources of all cells in the area. Since a, b, c cells have single-cell MBMS services, subframes #6, #7, #8 cannot be used for transmission. Multi-cell MBMS service. If the number of cells with a single-cell MBMS service is large, the MCE is difficult to find a common subframe resource to transmit the MBMS of the multi-cell, or the base station must notify the base station of the multi-cell MBMS service to occupy the resources, so that the base station adjustment table of each cell The subframe transmitted by the MBMS service of the cell. This is because: the resources of the single cell transmission MBMS service and the resources of the multi-cell transmission MBMS service are not distinguished, and the resource allocation of the single cell transmission MBMS service is determined by the base station, and the resources for allocating the multi-cell transmission MBMS service are MCE to decide.

Summary of the invention

The technical problem to be solved by the present invention is to solve the problem that the subframe configuration in the single cell transmission MBMS service and the multi cell transmission MBMS service conflicts due to the limitation of the single d and the area transmission subframe in the prior art, and a problem is proposed. The subframe selection method of the multimedia broadcast multicast service transmitted by the single cell makes the resource scheduling of the MBMS service in the whole system more convenient, and is advantageous for resource scheduling when the multi-cell transmits the MBMS.

In order to solve the above technical problem, the present invention provides a method for selecting a subframe of a multimedia broadcast multicast service MBMS for single cell transmission, including: the base station preferentially selects a subframe in which the multi-cell transmission MBMS service is not used, and transmits a single-cell MBMS service.

The above methods also include:

If the base station uses the multi-cell to transmit the subframe that the MBMS service does not use, and is not enough to transmit the single-cell MBMS service, it is determined whether there is a multi-cell transmission subframe in which the MBMS service is not used, if any, Then, the multi-cell transmission MBMS service is used to transmit the single-cell MBMS service. In the above method, the base station selects to transmit the single-cell MBMS service using the subframe in which the multi-cell transmission MBMS service is not used, according to the priority order of the subframes that the multi-cell transmission MBMS service does not use.

In the above method, the subframe that the multi-cell transmission MBMS service does not use is a sub-frame of a paging message and/or a system message of a potential transmission unicast service. In the above method, in the frequency division duplex FDD mode, the subframes that the multi-cell transmission MBMS service does not use include subframes #0, #4, #5, #9.

In the above method, the priority order of the subframes #0, #4, #5, #9 is: #5, #0, #4, #9. In the above method, in the time division duplex TDD mode, the subframes that the multi-cell transmission MBMS service does not use include subframes #0, #1, #5, #6.

In the above method, when the uplink and downlink configuration mode of the TDD mode is 3, 4, 5, the priority order selected by the base station in subframes #0, #1, #5, #6 is: priority selection subframe #6 , followed by #1, #5, #0.

In the foregoing method, when the uplink and downlink configuration mode of the TDD mode is 0, 1, 2, 6, the priority order selected by the base station in subframes #0, #1, #5, #6 is: preferentially selecting a subframe. #6, #1, #5, followed by #0.

In the above method, in the FDD mode, the base station preferentially selects the multi-cell transmission MBMS service that is not used in the subframes #1, #2, #3, #6, #7, #8 in the manner of continuous allocation from the back to the front. The subframe transmits a single cell MBMS service.

In the above method, in the TDD mode, the base station preferentially allocates non-uplink subframes other than the subframes #0, #1, #5, and #6 in a manner of being continuously allocated from the back to the front (the non-uplink subframe refers to the downlink sub-frame). The frame and the downlink-to-uplink handover subframe, hereinafter collectively referred to as non-uplink subframes, select a multi-cell transmission MBMS service that is not used to transmit a single-cell MBMS service.

By using the method of the present invention, single cell transmission MBMS service and multi-cell transmission can be avoided.

The subframe configuration of the MBMS service conflicts. The resource scheduling of the MBMS service in the whole system is more convenient, and the resource scheduling in the multi-cell transmission of the MBMS is facilitated, and the efficiency of the entire MBMS system is realized. BRIEF abstract

Figure 1 is a schematic diagram of the frame structure of FDD and TDD;

2 is a schematic diagram of multi-cell transmission MBMS;

3 is a schematic diagram of multi-cell transmission and single cell transmission MBMS;

4 is a flow chart of a method according to a first embodiment of the present invention;

Figure 5 is a schematic diagram of an LTE TDD mode frame structure 2.

Preferred embodiment of the invention

In the present invention, when the base station selects a subframe of the MBMS service for single cell transmission, only the subframe in which the multi-cell transmission MBMS service is not used is selected, or the subframe in which the multi-cell transmission MBMS service is not used is preferentially selected.

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Specifically, two methods are available:

Way 1

The base station preferentially selects a multi-cell transmission subframe that the MBMS service does not use, and secondly selects a multi-cell transmission subframe in which the MBMS service is not used, and transmits a single-cell MBMS service.

As shown in FIG. 4, the method flowchart of the method 1 includes the following steps:

Step 401: The base station preferentially selects a multi-cell transmission subframe that is not used by the MBMS service, and sends a single-cell MBMS service.

Multi-cell transmission The subframes that are not used by the MBMS service are sub-frames of paging messages and/or system messages for potentially transmitting unicast traffic;

For LTE, the single cell transmits the MBMS service. In the FDD mode, the base station is preferentially selected in the subframes #0, #4, #5, #9; the preferred order is: #5, #0, #4, #9;

It should be noted that the main basis of the selection order is the possibility that the subframe becomes a paging subframe, and the second is the resource size on the subframe, and the possibility that the subframe becomes a paging subframe is smaller, and The more resources that can be used to send a single-cell MBMS service on a subframe are preferred; for example, #5, #0 is the same as the probability of paging a subframe, and the resource on the #5 can be used to transmit the MBMS service of a single cell. More, so the order of selection is #5, #0, #4, #9;

For LTE, the single cell transmits the MBMS service. In the TDD mode, the base station is preferentially selected in the subframes #0, #1, #5, and #6. When the uplink and downlink configuration mode of the TDD mode is 3, 4, 5, the priority is selected. Frame #6, followed by #1, #5, #0; When the uplink and downlink configuration mode of TDD mode is 0, 1, 2, 6, priority subframe #6, #1, #5, followed by #0 ;

Step 402: If the base station uses the subframe that the multi-cell transmission MBMS service does not use, and is not enough to send the single-cell MBMS service, determine whether there is a multi-cell transmission subframe that is not used by the MBMS service, and if yes, perform the next step. Otherwise, end this process;

Step 403: The base station selects a multi-cell transmission, and sends a single-cell MBMS service to a subframe that is not used by the MBMS service.

In this step, for the LTE, in the FDD mode, the base station preferentially selects the multi-cell transmission MBMS in the subframes #1, #2, #3, #6, #7, #8 according to the manner of continuous allocation from the back to the front. A single cell MBMS service is sent by a subframe that is not used by the service;

For the LTE, TDD mode, the base station preferentially selects the subframes that are not used for transmitting the MBMS service in the non-uplink subframes other than the subframes #0, #1, #5, and #6 in the manner of continuous allocation from the back to the front. Single cell MBMS service.

Since the subframe used by the multi-cell transmission MBMS service is allocated from the beginning to the end, in the step 403 of the present invention, the manner of allocation from the back to the front is proposed, so that the single cell transmission MBMS service and the multi-cell transmission are avoided to the greatest extent. The subframe configuration of the MBMS service conflicts.

Way 2

The base station only selects a multi-cell transmission subframe that the MBMS service does not use, and transmits a single cell transmission MBMS service.

The subframe that the multi-cell transmission MBMS service does not use is a sub-frame of a paging message and/or a system message of a potential transmission unicast service.

Wherein, for LTE, the single cell transmits the MBMS service, and in the FDD mode, the base station is in the subframe #0, #4, #5, #9中选择; The order of preference is: #5, #0, #4, #9;

For LTE, the single cell transmits the MBMS service. In the TDD mode, the base station is preferentially selected in the subframes #0, #1, #5, and #6. When the uplink and downlink configuration mode of the TDD mode is 3, 4, 5, the priority is selected. Frame #6, followed by #1, #5, #0; When the uplink and downlink configuration mode of TDD mode is 0, 1, 2, 6, priority subframe #6, #1, #5, followed by #0 .

For the specific embodiment of the present invention, in the case of LTE, the potential paging subframes of the LTE in the FDD mode are #0, #4, #5, #9; the potential paging subframe in the TDD mode is #0, # 1, #5, #6.

As shown in FIG. 2, it is an area of MBMS service, and each cell in the area is also configured to support multi-cell transmission MBMS service and single-cell transmission MBMS service at the same time. According to the present invention, a method for selecting a single cell transmission MBMS service subframe is combined with an existing multi-cell transmission MBMS service subframe selection method. It is possible to reasonably configure the resources of the single cell transmission and the multi-cell transmission MBMS service in the MBMS service area.

Example 1

Assume that the cells in the area are in FDD mode.

Multi-cell transmission The resources of the MBMS service are configured by the MCE (one MCE can be configured with many cells), and the selectable subframes are #1, #2, #3, #6, #7, #8. The resources of the single cell transmission MBMS service are configured by the base station, and the subframes that can be selected or preferentially are #5, #0, #4, #9. For the specific use of subframe # 5, #0, #4, #9, describe as follows:

If the MBMS traffic of the single cell transmission is small, that is, when the MBMS traffic can be carried by the #5 subframe, only the #5 subframe is configured to transmit the MBMS service for the single cell, because the subframe #5 has a relative subframe #0. More resources, relative #4, #9 are less likely to be configured as paging subframes (subframes #0, #5 are configured to be the same as paging subframes). As the single cell MBMS traffic increases, the #0 subframe can be added as a single cell to transmit a subframe of the MBMS service. As the MBMS traffic increases, the sub-frame #4 can be further added as a sub-frame for transmitting the MBMS service in a single cell. As the traffic further increases, the sub-frame #9 can be added as a sub-frame for transmitting the MBMS service in a single cell. For a potential paging subframe, if a paging message is being sent, the paging message preferentially occupies the resources of the subframe, and the remaining resources are used to transmit the MBMS service.

If subframes #5, #0, #4, and #9 have all sent MBMS services for a single cell, they cannot The MBMS traffic demand of the single-cell transmission mode is met. In this case, the mode 1 and the mode 2 are processed in two cases. The base station using the mode 1 continues to select the multi-cell transmission MBMS service. MBMS services, such as when #1, #2, #3, #6, #7, #8 subframes are not used to send multi-cell MBMS services, can be used to send MBMS services in single-cell transmission mode. For the use of #1, #2, #3, #6, #7, #8, you should follow certain principles. The proposed principle is to continuously allocate and use the last available subframe, that is, the order of the single cell transmission MBMS service is #8, #7, #6, #3, #2, #1. The base station using mode 2 cannot use #1, #2, #3, #6, #7, #8 subframes. The ability of the base station using Mode 2 to carry MBMS services is already fully loaded.

It should be emphasized here, because subframes #5, #0 carry system information, when Ns=4, it also carries paging messages, so when sending MBMS services on subframes #5, #0, you can also consider (not It is also mandatory to make a mandatory request, and it is ok to reserve a certain resource for sending paging messages. The reason for not requiring resources to reserve system information and/or paging information is here: The resources used by the system information and the paging message are known, and the terminal is cyclical and slowly changing. This will not have a major impact on the MBMS business.

When the system bandwidth is small, if the system information and the paging message are carried on #0 or #5, the remaining resources of the subframe are small, the subframe can be skipped, and the single-cell MBMS is sent in other subframes. business. The remaining resources are rarely used when the remaining resources are used to carry the single-cell MBMS service, and the overhead of control signaling is much larger than that of the transmitted MBMS data.

Example 2

Assume that the cells in the area are in TDD mode.

Since the TDD mode of LTE has seven different proportions of uplink and downlink subframe configuration modes, as shown in Table 3, the subframes in the LTE that specify the multi-cell transmission MBMS service are except subframes #0, #1, #5, # Non-uplink subframes other than 6.

Table 3 LTE uplink and downlink subframe configuration table

1 5 ms DSUUDDSUUD

2 5 ms D S U D D D S U D D

3 10 ms D S U U U D D D D D

4 10 ms D S U U D D D D D D

5 10 ms D S U D D D D D D D

6 10 ms D S U U U D S U U D In Table 3, D denotes a downlink subframe, U denotes an uplink subframe, and S denotes a downlink-to-uplink handover subframe.

Multi-cell transmission The resources of the MBMS service are configured by the MCE (one MCE can be configured with many cells), and the selectable subframes are non-uplink subframes other than subframes #0, #1, #5, and #6. The resources of the single cell transmission MBMS service are configured by the base station, and the subframes that can be selected or preferentially are #0, #5, #1, #6. For the specific use of subframes #0, #5, #1, #6, the description is as follows: If the uplink and downlink subframe configuration mode is 3, 4, 5 in TDD mode, then subframe #6 is the downlink subframe. And the paging message is sent only when Ns=4. In this case, the MBMS service of the single cell transmission mode is preferentially transmitted using the subframe #6. Secondly, according to the increase of MBMS traffic, sub-frames #1, #5, #0 are selected in turn. If the MBMS traffic of the single cell transmission continues to increase, the base station using the mode 1 can select the downlink cell that is not used by the multi-cell transmission MBMS service to transmit the single cell MBMS service, for example, the downlink subframe is continuously forwardly allocated from the subframe #9. For example, three subframes need to be allocated, and subframes #9, #8, #7 can be allocated. If two subframes need to be allocated, subframes #9 and #8 are allocated. For the base station using mode 2, since only the subframes in which the single cell transmission MBMS service is specified are #0, #1, #5, #6, other downlink subframes cannot be used.

When the TDD uplink and downlink configuration mode is 0, 1, 2, 6, you can also operate in the uplink and downlink configuration mode of 3, 4, and 5. You can also do the following:

The subframe configuration priority of the MBMS service transmitted by the single cell is subframe #6, #1, #5, #0. When other downlink subframes are selected, the downlink subframes are continuously allocated from the back to the front, for example, need to be allocated. For 3 subframes, 3 downlink subframes can be consecutively allocated from #9; if 2 subframes need to be allocated, 2 downlink subframes can be consecutively allocated from #9. It should be emphasized here, because subframes #5, #0 carry system information, and when Ns=4, they also carry paging messages, so when sending MBMS services on subframes #5, #0, you can also consider (not It is also mandatory to make a mandatory request, and it is ok to reserve a certain resource for sending paging messages. The reason for not requesting resources for system information and/or paging information is not required here: The resources used by the system information and/or paging information are known by the terminal, and are cyclical and slowly changing. This will not have a major impact on the MBMS service.

When the system bandwidth is small, if the system information and the paging message are carried on #0 or #5, the remaining resources of the subframe are small, the subframe can be skipped, and the single-cell MBMS is sent in other subframes. business.

Also because subframe #6 or #1 also needs to send some other data, as shown in Figure 5, send

DwPTS (Downlink Pilot Time Slot), UpPTS (Uplink Pilot Time Slot), GP (Guard Period). After the above information is sent, if the remaining resources are small, the subframe may be skipped and continued to be transmitted in other subframes. The remaining resources are rarely used when the remaining resources are used to carry the single-cell MBMS service, and the control signaling overhead is much larger than the transmitted MBMS data.

The method of the invention is adopted, so that the cell can flexibly implement resource allocation under the simultaneous coverage of the single cell and the multi-cell MBMS transmission mode, which is beneficial to realizing resource scheduling in single-cell MBMS transmission and multi-cell transmission MBMS, so that the whole system The resource scheduling of the MBMS service is more convenient, and the efficiency of the entire MBMS system is realized.

It is a matter of course that the invention may be embodied in various other forms and modifications without departing from the spirit and scope of the invention.

Industrial applicability

By using the method of the present invention, single cell transmission MBMS service and multi-cell transmission can be avoided

The subframe configuration of the MBMS service conflicts. The resource scheduling of the MBMS service in the whole system is more convenient, and the resource scheduling in the multi-cell transmission MBMS is realized, and the efficiency of the entire MBMS system is realized.

Claims

Claim

A single-cell transmission multimedia broadcast multicast service MBMS subframe selection method, including: The base station uses a multi-cell transmission MBMS service does not use a subframe to transmit a single-cell MBMS service.

2. The method of claim 1 further comprising:

If the subframe that the base station does not use to transmit the MBMS service is not enough to send the single cell MBMS service, it is determined whether there is a subframe in which the multi-cell transmission MBMS service is not used, and if so, the multi-cell transmission is selected to be used. A single cell MBMS service is transmitted in a subframe that is not used by the MBMS service.

The method according to claim 1 or 2, wherein the step of transmitting, by the base station, the single-cell MBMS service using the subframe in which the multi-cell transmission MBMS service is not used includes: the base station not transmitting the MBMS service according to the multi-cell transmission The priority order of the subframes is selected to transmit a single cell MBMS service using a subframe in which the multi-cell transmission MBMS service is not used.

4. The method according to claim 3, wherein the subframe that the multi-cell transmission MBMS service does not use is a subframe of a paging message and/or a system message that potentially transmits a unicast service.

5. The method according to claim 4, wherein, in the frequency division duplex FDD mode, the subframes that the multi-cell transmission MBMS service does not use include subframes #0, #4, #5, #9.

6. The method according to claim 5, wherein the priority order of the subframes #0, #4, #5, #9 is: #5, #0, #4, #9.

The method according to claim 3, wherein, in the time division duplex TDD mode, the subframes that the multi-cell transmission MBMS service does not use include subframes #0, #1, #5, #6.

8. The method according to claim 7, wherein, when the uplink and downlink configuration mode of the TDD mode is 3, 4, 5, the step of the base station selecting to use the multi-cell to transmit a subframe that the MBMS service does not use includes: : Priority is selected for subframe #6, followed by #1, #5, #0.

9. The method according to claim 7, wherein the uplink and downlink configuration mode of the TDD mode is

0, 1, 2, 6, the step of the base station selecting to use the multi-cell transmission MBMS service does not use the subframe includes: preferentially selecting the subframe #6, #1, #5, followed by #0.

10. The method of claim 2, wherein, in the FDD mode, the base station selects a usage site The step of transmitting a single-cell MBMS service in a subframe in which the multi-cell transmission MBMS service is not used includes: the base station preferentially allocates from the back to the front in the subframes #1, #2, #3, #6, #7, # 8 selects to transmit a single cell MBMS service using a subframe in which the multi-cell transmission MBMS service is not used.

The method according to claim 2, wherein, in the TDD mode, the step of the base station selecting to transmit the single-cell MBMS service using the subframe in which the multi-cell transmission MBMS service is not used includes: the base station preferentially follows from the back to the front The allocation mode selects to transmit a single-cell MBMS service using a subframe in which the multi-cell transmission MBMS service is not used, in other non-uplink subframes other than the subframes #0, #1, #5, and #6.