WO2014023240A1 - Method and system for sending group small data - Google Patents

Abstract

Disclosed is a method for sending group small data. The method comprises: transmitting group small data to a UE via a multimedia broadcast multicast service (MBMS) system, wherein at an air interface, the group small data is borne by a multimedia broadcast multicast service point-to-multipoint control channel (MCCH) message. Also disclosed is a system for sending group small data, comprising a group small data sending device configured to transmit group small data to a UE via an MBMS system, wherein at an air interface, the group small data is borne by an MCCH message. By adopting the method and system of the present invention, without the need of a great amount of signalling overhead and network resource occupancy, the data transmission efficiency is improved, and the realization complexity is not high.

Description

 Method and system for transmitting group small data

 The present invention relates to a third generation mobile communication long term evolution (LTE) system, and in particular, to a method and system for transmitting group small data. Background technique

 With the rapid development of the Internet and the popularity of large-screen multi-function mobile phones, there have been a large number of mobile data multimedia services and various high-bandwidth multimedia services, such as video conferencing, television broadcasting, video on demand, advertising, online education, interactive games, etc. 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. Compared with general data services, they have the characteristics of large data volume, long duration, and delay sensitivity.

 In order to effectively utilize mobile network resources, the 3rd Generation Partnership Project (3GPP) proposes a Multimedia Broadcast Multicast Service (MBMS) service, which is a data source. The technology of transmitting data by multiple targets realizes the sharing of the network, including the core network and the access network resources, and improves the utilization of network resources, especially the air interface resources. The 3GPP-defined MBMS not only enables plain text low-rate message-like multicast and broadcast, but also enables high-speed multimedia services to 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 third-generation mobile communications (3G).

The LTE system is composed of an Evolved Universal Terrestrial Radio Access Network (E-UTRAN), a User Equipment (UE), and an Evolved Packet Core Network (EPC). The MBMS system architecture based on LTE system design is shown in Figure 1. Shown. The 3G system is composed of a universal mobile communication system (UTRAN, UMTS Terrestrial Radio Access Network), a UE, and a core network (CN). The MBMS system architecture based on 3G system design is shown in Figure 2.

 The Broadcast-Multicast Service Centre (BM-SC) is the entry point for content providers to authorize and initiate MBMS bearer services in the mobile network and to deliver MBMS content according to a predetermined time schedule.

 The functions of the BM-SC include: 1) authentication, authorization and charging for third-party content providers; 2) providing MBMS transmission related parameters such as quality of service (QoS), multicast broadcast area, initiation and termination MBMS transmission resources; 3) receiving and transmitting MBMS content from an external data source, scheduling MBMS session transmission and informing the user, retransmission of the session, etc.; 4) service statement in the function of the BM-SC, including media description, session description such as multicast Business identification, address, delivery time, etc.

 Evolved Multimedia Broadcast and Multicast Service Gateway (MBMS GW, E-MBMS Gateway), the entity is between the BM-SC and the enhanced base station (eNB), and its basic function is to transmit and broadcast MBMS data processed via the synchronization protocol. Packets are given to the corresponding eNB. The MBMS GW has a user plane PDCP layer, and sends MBMS user data to the eNB in an IP multicast manner. The MBMS GW gateway sends MBMS session control signaling (session start/end) to the E-UTRAN through a Multi-cell/Multicast Coordination Entity (MCE).

The functions of the MCE include: 1) All the cells in the MBSFN (Multicast Cell MBSFN) are allocated radio resources in the Multimedia Broadcast multicast service Single Frequency Network (MBSFN) area; 2) In the radio resources, In addition to time/frequency radio resources, it also includes determining detailed radio resource configuration, such as modulation and coding schemes; 3) MCE participates in MBMS session control signaling. However, the MCE does not perform signaling between UE-MCEs. Among them, for MBSFN, the MBMS system designed in 3GPP Release 9 uses MBSFN to transmit MBMS services, and the MBSFN transmission mode is adopted. The same signal (MBMS control signaling and service data) is synchronously transmitted on the same physical resource of the same-frequency cell, so that the UE receiving the MBMS service receives the enhanced signal after the multiple cells are superimposed, so as to improve the signal receiving quality of the UE.

 The main processes of MBMS include the session start and session end processes. The following is a description of the MBMS system architecture based on the LTE system and 3G design.

 Based on the MBMS system architecture designed by the LTE system, the session start process is as shown in FIG. 3, and includes the following steps:

 Step 101: The BM-SC initiates a session start request (Session Start Request), and sends a Session Start Request to the MBMS GW.

 Step 102: The MBMS GW returns a response to the session start request (Session Start

Response ) to BM-SC;

 Step 103: The MBMS GW sends a Session Start Request to the mobility management entity (MME).

 Step 104: The MME sends a Session Start Request to the E-UTRAN.

 Step 105: The E-UTRAN returns a Session Start Response to the MME.

 Step 106: The MME returns a Session Start Response to the MBMS GW.

 Step 107: E-UTRAN performs resource and channel allocation (RAN Resource Setup); Step 108: E-UTRAN performs IP address multicast join for subsequent MBMS data transmission;

 Steps 109 to 110, MBMS data transmission.

 Here, when the MBMS system architecture based on the 3G design, the session start process is similar to the above-mentioned EST system-based session start process, except that the network entity is different, and the MME is replaced with a general packet radio service support node (SGSN). E-UTRAN can be replaced by UTRAN.

When the MBMS system architecture based on the LTE system is designed, the end of the session is shown in Figure 4. Includes the following steps:

 Step 201: The BM-SC initiates a session stop request, and sends a Session Stop Request to the MBMS GW.

 Step 202, the MBMS GW returns a session termination response (Session Stop Response) to the BM-SC;

 Step 203: The MBMS GW sends a Session Stop Request to the MME.

 Step 204: The MME returns a Session Stop Response to the MBMS GW.

 Step 205: The MME sends a Session Stop Request to the E-UTRAN.

 Step 206, E-UTRAN returns a Session Stop Response to the MME;

 Step 207: The E-UTRAN sends an IGMPv3 Membership Report based on the multicast group management protocol to leave the multicast group.

 Step 208: The E-UTRAN releases the resource and the channel (RAN Resource Release).

 Here, when the MBMS system architecture based on the 3G design, the session end process is similar to the above-mentioned LTE system-based session end process, except that the network entity is different, the MME is replaced with the SGSN, and the E-UTRAN is replaced with the UTRAN.

 In the machine-to-machine (M2M) communication application, there is a common type of group data service, that is, the network sends the same data to multiple terminal devices, which have the same specificity. Attributes, for example, multiple terminal devices belonging to one mall or factory, and multiple terminal devices that implement a certain function. In particular, for M2M applications, the amount of data of such group data is generally small, and is called a small data service.

 If the small data service of the group is sent to each terminal device in a point-to-point manner, it needs to occupy multiple network resources, and the signaling overhead is large and the efficiency is not high; especially the number of terminal devices in the group. There are many scenes with relatively concentrated distribution, and such scenes are more common in M2M applications.

In summary, the problems in the prior art are: In the M2M communication application, for the number of groups According to the transmission, especially the small data service of the group data, the existing point-to-point transmission mode uses a large amount of signaling overhead and network resources. In response to this problem, there is currently no effective solution. Summary of the invention

 In view of this, the main purpose of the embodiments of the present invention is to provide a method and system for transmitting group small data, which can transmit point small data through the MBMS system to realize point-to-multipoint data transmission.

 To achieve the above objective, the technical solution of the embodiment of the present invention is implemented as follows:

 A method for transmitting group small data, the method comprising: transmitting, by using a multimedia broadcast and multicast service MBMS system, group small data to a UE, where the air interface passes the multimedia broadcast and the multicast service point-to-multipoint control channel MCCH The message carries group small data.

 The method for transmitting the group small data to the UE by using the MBMS system, and carrying the group small data by using the MCCH message in the air interface specifically includes:

 The broadcast multicast service center BM-SC receives the group data transmission request sent by the machine to the machine M2M server;

 Determining, by using the MCCH message carrying group small data small data, and performing MBMS session transmission according to the small data indication of the small data encapsulated in the group data transmission request, and transmitting the small data to the UE.

 The group data transmission request specifically includes: the small data indication, and/or service identifier, and/or group identifier, and/or data transmission range, and/or data characteristics, and/or data volume. Size information, and/or number of times the data is sent repeatedly.

 The small data indication specifically includes: small data indication information, and/or data volume size information.

The determining, by using the MCCH message to carry the small data according to the small data indication, the method includes: determining, according to the small data indication information in the small data indication, that the current group data is small data, and determining to use the MCCH message to carry small data. ; After the small data is transmitted to the UE, the method further includes: obtaining, according to the data size information, that the current group data is small data, and automatically releasing the resources and channels occupied by the transmission after the small data transmission ends, The MBMS session end signaling process needs to be performed.

 The service identifier is specifically a service identifier of a service that the user directly subscribes to; or the service identifier is specifically corresponding to the temporary mobile group identifier TMGI, and a mapping relationship is formed; or the TMGI is directly used as the service identifier; or ,

 The service identifier specifically corresponds to the MBMS service identifier, and forms a mapping relationship.

 Where the access network is an evolved universal terrestrial radio access network E-UTRAN, the method specifically includes:

 The BM-SC initiates a session start request Session Start Request, and sends the Session Start Request to the MBMS GW; and encapsulates the small data indication in the Session Start Request;

 The MBMS GW returns a session start response to the BM-SC; the MBMS GW sends the Session Start Request to the mobility management entity MME; the MME sends a Session Start Request to the E-UTRAN; - UTRAN returns a Session Start Response to the MME; the MME returns a Session Start Response to the MBMS GW;

 E-UTRAN performs resource allocation and channel configuration. RAN Resource Setup; IP address multicast Join; transmits small data in the form of MBMS data to the UE.

 The performing the RAN Resource Setup by the E-UTRAN specifically includes: determining, by the multi-cell multicast coordination entity MCE in the E-UTRAN, that the MCCH message is used according to the small data indication after receiving the Session Start Request The MCEs are configured to carry the MCCH parameters for each enhanced base station eNB in the range of the small data transmission service, and instruct the eNB to carry the small data in the MCCH message.

The manner of carrying the small data by using the MCCH message specifically includes the following Any one way:

 In the existing multimedia broadcast and multicast service single frequency network area configuration MBSFN Area Configuration message to increase the force σ - a cell, carrying small data;

 Adding a cell to the existing physical multicast channel information PMCH-info message, carrying small data;

 A new message is added to the MCCH channel carrying small data.

 Wherein, when the access network is a universal mobile communication system terrestrial radio access network UTRAN, the method specifically includes:

 The BM-SC initiates a session start request Session Start Request, and sends the Session Start Request to the MBMS GW; and encapsulates the small data indication in the Session Start Request;

 The MBMS GW returns a Session Start Response to the BM-SC; the MBMS GW sends the Session Start Request to the General Packet Radio Service Support Node SGSN; the SGSN sends a Session Start Request to the UTRAN; the UTRAN returns a Session Start Response To the SGSN; the SGSN returns a Session Start Response to the MBMS GW;

 The UTRAN performs RAN Resource Setup; IP address multicast join; transmits small data in the form of MBMS data to the UE.

 The performing, by the UTRAN, the RAN Resource Setup specifically includes: after receiving the Session Start Request by the radio network controller RNC in the UTRAN, determining, by using a small data indication, to use the MCCH message to carry the small data. The RNC configures MCCH parameters for each base station NodeB in the small data transmission service range, and instructs the NodeB to carry the small data in the MCCH message.

The manner of carrying the small data by using the MCCH message specifically includes any one of the following methods: Adding a cell to the existing MBMS modified service information, carrying small data;

 Adding a cell to the existing MBMS current cell PTM RB information, carrying small data;

 A new message is added to the MCCH channel carrying small data.

 A group d, a data transmission system, the system includes a group d on the network side, and a data sending device, configured to transmit the group small data to the UE through the MBMS system, where the group is small in the air interface through the MCCH message data.

 The group small data sending device includes: an M2M server, a BM-SC; wherein the M2M server is configured to send a group data transmission request to the BM-SC; and the BM-SC is configured to be configured according to The small data indication encapsulated in the group data transmission request determines that the MCCH message carries small data, and performs MBMS session transmission, and transmits the small data to the UE.

 The group data transmission request specifically includes: the small data indication, and/or service identifier, and/or group identifier, and/or data transmission range, and/or data characteristics, and/or data volume. Size information, and/or number of times the data is sent repeatedly.

 The small data indication specifically includes: small data indication information, and/or data volume size information.

 The group small data sending device further includes: an MBMS GW, an MME, and an E-UTRAN; the BM-SC is further configured to initiate a Session Start Request, where the session is

The Start Request is sent to the MBMS GW; the small data indication is encapsulated in the Session Start Request;

The MBMS GW is configured to: after receiving the Session Start Request, return a Session Start Response to the BM-SC; send the Session Start Request to the MME; and receive a Session Start Response returned by the MME; The MME is configured to: after receiving the Session Start Request, send a Session Start Request to the E-UTRAN; receive the Session Start Response returned by the E-UTRAN and return it to the MBMS GW;

 The E-UTRAN is configured to return a Session Start Response to the MME; perform RAN Resource Setup; IP address multicast join; and transmit small data in the form of MBMS data to the UE.

 The E-UTRAN is further configured to: after receiving the Session Start Request, the MCE in the E-UTRAN determines, according to the small data indication, that the MCCH message is used to carry the small data; and the MCE is a small Each eNB in the data transmission service area configures an MCCH parameter, and instructs the eNB to carry the small data in the MCCH message.

 The group small data sending device further includes: an MBMS GW, an SGSN, and a UTRAN; the BM-SC is further configured to initiate a Session Start Request, and send the Session Start Request to the MBMS GW; in the Session Start Request Encapsulating the small data indication;

 The MBMS GW is configured to: after receiving the Session Start Request, return a Session Start Response to the BM-SC; send the Session Start Request to the SGSN; and receive a Session Start Response returned by the SGSN;

 The SGSN is configured to: after receiving the Session Start Request, send a Session Start Request to the UTRAN; receive the Session Start Response returned by the UTRAN and return it to the MBMS GW;

 The UTRAN is configured to return a Session Start Response to the SGSN; perform RAN Resource Setup; IP address multicast join; and transmit small data in the form of MBMS data to the UE.

The UTRAN is further configured to be received by the RNC in the UTRAN. After the Session Start Request, the MCCH message is used to carry the small data according to the small data indication; the MCCH parameter is configured by the RNC for each NodeB in the small data transmission service range, and the NodeB is instructed to carry the small data in the MCCH message. .

 The embodiment of the present invention transmits the group small data to the UE through the MBMS system, where the group small data is carried in the air interface through the MCCH message.

 The embodiment of the present invention uses the MBMS system to transmit the group small data service by using the MBMS transmission mechanism. Therefore, the point-to-multipoint data transmission can be implemented, which is different from the prior art point-to-point transmission mode. By optimizing and utilizing the existing MBMS transmission mechanism to implement the point-to-multipoint transmission mode, the group small data service is carried on the MBMS point-to-multipoint control channel (MCCH) channel and sent to the UE without a large amount of signaling overhead and The network resource is occupied, the data transmission efficiency is improved, and the implementation complexity is not high. DRAWINGS

 FIG. 1 is an architecture diagram of an existing MBMS system based on an LTE system design;

 Figure 2 is an architecture diagram of an existing MBMS system based on 3G system design;

 3 is a process of starting a session of an MBMS system based on an LTE system design; FIG. 4 is a process of starting a session end of an MBMS system based on an LTE system design; FIG. 5 is a flowchart of an MBMS system based on an LTE system according to an embodiment of the present invention; Session start process;

 FIG. 6 is a flowchart showing a session start process of an MBMS system based on a 3G system according to an embodiment of the present invention. detailed description

 In the embodiment of the present invention, the group small data is sent by the MBMS system, and the group small data is encapsulated in the MCCH message and sent to the UE.

In terms of methods, the embodiments of the present invention mainly include the following contents: Through the MBMS system, the group small data is transmitted to the UE by using the MBMS transmission mechanism, and the group small data is carried by the MCCH message on the air interface.

 Preferably, the machine to machine server (M2M server) is connected to the BM-SC as a content provider (Contents Provider). The functions implemented by the M2M server include: Sending a group data transmission request to the BM-SC to provide group data. The group data transmission request includes: group identification, and/or data transmission range, and/or data characteristics, and/or data transmission times.

 Here, the functions implemented by the BM-SC include: authenticating, authorizing, and charging the group data transmission request sent by the M2M server; providing MBMS transmission related parameters, such as QoS, multicast broadcast area, initiating and terminating the MBMS transmission resource. Further, the BM-SC determines which transmission mode to use according to the group data size information in the group data transmission request; receives and transmits the MBMS content from the external data source, that is, the M2M server, and arranges the MBMS session according to the transmission mode. Transmission; The service statement implemented by the BM-SC, including media description, session description such as multicast service identifier, transmission mode, address, transmission time, and so on.

 Preferably, the air interface transmission mode is specifically: the air interface sends control signaling and service data through the MCCH channel, and does not configure a corresponding MBMS point-to-multipoint traffic channel (MTCH) channel, which is suitable for group data service transmission of small data.

 Here, the air interface transmission mode is adopted, that is, when the group small data is carried on the MCCH channel, the following contents are included:

 When a user (M2M device) subscribes to a service, it can directly obtain the service ID of the subscribed service.

Or, the service identifier is further mapped to a specific Temporary Mobile Group Identity (TMGI) to form a mapping relationship; or the service identifier is mapped to the MBMS service identifier to form a mapping relationship; or, the TMGI is Directly as a business identifier. The MBMS service identifier includes: an MBMS service identifier (MBMS service ID) and an MBMS session identifier (MBMS session ID). The M2M server sends a group data transmission request to the BM-SC, indicating that the data is a small data, and the group data transmission request may further include information such as the data size information, the service identifier, and the sending area range. The data volume size information is used by the access network to determine the end of the transmission and automatically release the channel, and the session end process needs to be performed, as in the prior art. The session start process needs to be performed. Because it is small data, the access network can judge the end of the transmission and automatically release the channel. Thus, the normal session end process is omitted, thereby saving signaling overhead.

 In the following, the session start process in the MBMS system architecture based on the LTE system is taken as an example to describe the session start process.

 Based on the MBMS system architecture designed by the LTE system, the session start process includes the following steps: Step 301: The BM-SC initiates a Session Start Request, and sends a Session Start Request to the MBMS GW.

 Here, the small data indication is added to the session start request message. Specifically, the small data indication may include information such as small data indication information, data size information, and the like. The small data indicates information (indicating that the current group data is small data), and the data size information automatically releases the small data after the session start process is executed in the future, and the session end process is not required to release the group data. Here, the above group data transmission request is specifically a Session Start Request in this flow.

 Step 302: The MBMS GW returns a Session Start Response to the BM-SC.

 Step 303: The MBMS GW sends a Session Start Request to the MME.

 Here, the Session Start Request still carries the small data indication of the booster port. Step 304: The MME sends a Session Start Request to the E-UTRAN.

 Here, the Session Start Request still carries the small data indication of the booster port. Step 305: The E-UTRAN returns a Session Start Response to the MME.

Step 306: The MME returns a Session Start Response to the MBMS GW. Step 307: The E-UTRAN performs a RAN Resource Setup ₀ - resource allocation and channel configuration process.

 Here, the resource allocation and channel configuration process is specifically: the MCE in the E-UTRAN determines to use the air interface transmission manner to carry the group data according to the small data indication, and sends the group data by using an MBMS SCHEDULING INFORMATION message. Each eNB in the area configures parameters of the MCCH, instructs the eNB to carry the small data in the MCCH message, and when configuring the MCCH Update Time, considers that the MBMS GW sends the small data to the eNB, and the eNB encapsulates the small data to The delay time required for the MCCH, so that the updated small data content can be accurately received when the delay time arrives.

 Step 308: The E-UTRAN performs IP address multicast join for subsequent MBMS data transmission.

 Step 309 to step 310, MBMS data transmission.

 Corresponding to step 308, step 309 to step 310, after receiving the MCCH parameter configuration from the MCE, the eNB receives the small data content sent by the MBMS GW.

 The manner in which the eNB transmits group data on the MCCH channel is as follows:

1) adding a cell to the existing MBMS Single Area Network Configuration (MBSFN Area Configuration) message, carrying _sma ll data;

 2) adding a cell to the existing physical multicast channel information (PMCH-info), carrying small data;

 3) Add a new message to the MCCH channel to carry small data, similar to the counting command, and configure it in the MCCH.

When the MCCH Update Time arrives, the eNB broadcasts a new MCCH message on the MCCH channel of the air interface. The UE receives the MCCH message, and according to the small data indication, reads the content of the small data in the corresponding signaling that adopts the above three transmission modes. It should be pointed out here that: Based on the MBS system architecture of 3G design, the session start process is similar to the above-mentioned session start process based on the LTE system design, except that the network entity is different, replacing the MME with the SGSN, and replacing the E-UTRAN with UTRAN can be. That is to say, the method in the embodiment of the present invention is applicable to the case where the access network is E-UTRAN and the case where the access network is UTRAN.

 In summary, the embodiment of the present invention has the following differences from the existing MBMS session flow: the small data indication needs to be added to the Session Start Request message in steps 301, 303, and 304, which may include small data indication information and data size. Information and other information.

 In the RAN Resource Setup process of step 307, the MCE decides to carry the small data on the MCCH, and can adopt any one of the foregoing three transmission modes to implement data transmission of the air interface and configure the MCCH parameter; the eNB will according to the MCE. The request to assemble the MCCH message and send it on the air interface.

 Because it is small data, the BM-SC does not need to trigger the end of the session process as in the existing MBMS service flow. Therefore, after the eNB transmits the small data, it directly releases the content related to the small data in the MCCH, MME/MCE/MBMS. - The GW automatically releases the information of the small data, and does not need to perform the displayed end of the session, thereby saving signaling overhead.

 The implementation of the technical solution will be further described in detail below with reference to the accompanying drawings.

 The first embodiment: The E-UTRAN is used as an example. The mode in which the eNB transmits the group data on the MCCH channel is the first transmission mode, that is, one cell is added to the existing MBSFN Area Configuration message, and the small data is carried.

 After the M2M server is added as the content provider, the locations of the components in the system architecture are different. Only the newly added M2M server can be connected to the BM-SC.

The user subscribes to the service provider with a weather forecast service, and the service identifier is No.N; further, the service identifier No.N may correspond to a specific TMGI, or an MBMS Service ID and a Session ID; or directly use TMGI. As a business identifier. The weather forecast business The data is updated every two hours, and the amount of data per update is approximately 500 bits.

 The service provider provides the weather forecast service data to the user through the operator's network, and the user receives the data through the terminal device. Since many users subscribe to the weather forecast service, the content received by each user when the data is updated is the same. In order to save network resources, the data can be transmitted through the group data transmission method.

 The service server of the service provider is connected to the BM-SC entity of the operator, and the service server sends a group data transmission request to the BM-SC, and indicates that this is a small data, and the data size is 1K bit, the service identifier is No.N, Information such as the scope of the sending area (based on the approximate location of the subscriber and the validity of the service);

 In addition to the existing functions, the BM-SC also implements the mapping of service identifiers and the selection of transmission modes. Optionally, the BM-SC converts the No.N into a TMGI according to a preset identifier mapping relationship, or

MBMS Service ID and Session ID.

 If the service is directly identified by using the TMGI, the above-described identity conversion process based on the identity mapping relationship is not required.

 The session starting process in this embodiment is as shown in FIG. 5, and includes the following steps:

 Step 401: The BM-SC initiates a Session Start Request, and sends a Session Start Request to the MBMS GW.

 Here, the σ small data indication cell is added to the Session Start Request message, and includes information such as small data indication information, data size, and the like. Then follow the normal process for the session establishment process.

 Step 402: The MBMS GW returns a Session Start Response to the BM-SC.

 Step 403: The MBMS GW sends a Session Start Request to the MME.

 Here, the Session Start Request still carries the small data indication of the booster port. Step 404: The MME sends a Session Start Request to the E-UTRAN.

Here, the Session Start Request still carries the small data indication of the booster port. Step 405: The E-UTRAN returns a Session Start Response to the MME.

 Step 406: The MME returns a Session Start Response to the MBMS GW.

 Step 407: The E-UTRAN executes RAN Resource Setup.

 Here, the RAN Resource Setup specifically includes:

 The MCE in the E-UTRAN receives the Session Start Request message, and determines, according to the small data indication, the small data that uses the MCCH to carry the weather forecast service.

 The MCE configures the MCCH parameters for each eNB in the weather pre-service area by using the MBMS SCHEDULING INFORMATION, instructs the eNB to carry the data in the MCCH message, and considers that the MBMS GW sends data to the eNB and the eNB when configuring the MCCH Update Time. The delay of data to MCCH.

 Step 408: The E-UTRAN performs IP address multicast join for subsequent MBMS data transmission.

 Step 409 to step 410, MBMS data transmission.

 Corresponding to step 408, step 409 to step 410, after receiving the MCCH configuration from the MCE, the eNB receives the small data content sent by the MBMS GW.

 The eNB encapsulates the small data in a new cell in the MBSFN Area Configuration message in the existing MCCH channel, and configures the service identifier (weather forecast service identifier) corresponding to the small data in the cell; the cell The length is variable to accommodate the transmission of small data of different sizes. When the MCCH Update Time arrives, the eNB carries the small data content in the MBSFN Area Configuration message in the MCCH and broadcasts on the MCCH channel of the air interface.

 The UE that receives the MBSFN Area Configuration message may decide whether to acquire the small data content according to the service identifier in the new cell.

The UE that subscribes to the weather forecast service receives the MCCH message according to the preset period, and reads the small data data according to the service identifier (weather forecast service identifier) corresponding to the small data. Rong, and then obtained updated weather forecast data.

 In the existing system, in order to further reduce the power consumption caused by the UE periodically reading the MCCH signaling content, the LTE system simultaneously proposes an MBMS Notification (MBMS Notification) mechanism, and uses physical layer signaling to indicate whether the MCCH information will be changed. . The UE only needs to monitor the MBMS notification indication. According to the content indicated by the MBMS notification, the UE then decides whether to receive the MCCH information, thereby saving power. The UE periodically monitors the MBMS notification indication information according to the configured MCCH modification period and the MBMS notification indicating the number of information transmission times and the subframe position. According to whether the specific bit in the MBMS Notification is set to trigger the reading of the corresponding MCCH, the service information (including the service identifier and the service configuration information) configured in the MCCH is obtained, and whether the service is a service that is of interest to the user is determined to determine whether the service is Receive.

 In combination with the foregoing process, the UE that subscribes to the weather forecast service in the embodiment of the present invention may also listen to the MBMS notification according to a preset period, and trigger the UE to receive the MCCH message at a specific time point according to the content of the notification, and corresponding to the small data according to the data. The business identifier (weather forecast service identifier), the content of the small data is read, and the updated weather forecast data is obtained.

 The BM-SC, the MBMS GW, the MME, the MCE, and the eNB can determine whether the data is successfully sent according to the size information of the weather forecast service data, and then release the corresponding connection, without performing the displayed session end process, saving signaling overhead. .

 It should be pointed out here that: Based on the MBS system architecture of 3G design, the session start process is similar to the above-mentioned session start process based on the LTE system design, except that the network entity is different, replacing the MME with the SGSN, and replacing the E-UTRAN with UTRAN can be. That is to say, the method in the embodiment of the present invention is applicable to the case where the access network is E-UTRAN and the case where the access network is UTRAN.

Embodiment 2: Taking the E-UTRAN as an example, the mode in which the eNB transmits the group data on the MCCH channel is the foregoing second transmission mode, that is, adding one cell to the existing PMCH-info and carrying the small data. After the M2M server is added as the content provider, the locations of the components in the system architecture are different. Only the newly added M2M server can be connected to the BM-SC.

 The user subscribes to the service provider with a weather forecast service, and the service identifier is No.N; further, the service identifier No.N may correspond to a specific TMGI, or an MBMS Service ID and a Session ID; or directly use TMGI. As a business identifier. The weather forecast service updates data every two hours, with an amount of data of approximately 500 bits per update.

 The service provider provides the weather forecast service data to the user through the operator's network, and the user receives the data through the terminal device. Since many users subscribe to the weather forecast service, the content received by each user when the data is updated is the same. In order to save network resources, the data can be transmitted through the group data transmission method.

 The service server of the service provider is connected to the BM-SC entity of the operator, and the service server sends a group data transmission request to the BM-SC, and indicates that this is a small data, and the data size is 1K bit, and the service identifier is No.N. Information such as the scope of the sending area (based on the approximate location of the subscriber and the validity of the service);

 In addition to the existing functions, the BM-SC also implements the mapping of service identifiers and the selection of transmission modes. Optionally, the BM-SC converts the No.N into a TMGI, or an MBMS Service ID and a Session ID, according to a preset identifier mapping relationship.

 If the service is directly identified by using the TMGI, the above-described identity conversion process based on the identity mapping relationship is not required.

 Similar to the process of the first embodiment shown in FIG. 5, the difference is that, unlike the MCCH channel configuration in the step 407 of the first embodiment, a cell is added to the existing PMCH-info to carry small data.

 The session start process of this embodiment includes the following steps:

Step 501: The BM-SC initiates a Session Start Request, and sends a Session Start Request to the MBMS GW. Here, the σ small data indication cell is added to the Session Start Request message, and includes information such as small data indication information, data size, and the like. Then follow the normal process for the session establishment process.

 Step 502: The MBMS GW returns a Session Start Response to the BM-SC.

 Step 503: The MBMS GW sends a Session Start Request to the MME.

 Here, the Session Start Request still carries the small data indication of the booster port. Step 504: The MME sends a Session Start Request to the E-UTRAN.

 Here, the Session Start Request still carries the small data indication of the booster port. Step 505: The E-UTRAN returns a Session Start Response to the MME.

 Step 506: The MME returns a Session Start Response to the MBMS GW.

 Step 507: The E-UTRAN executes RAN Resource Setup.

 Here, the RAN Resource Setup specifically includes:

 The MCE in the E-UTRAN receives the Session Start Request message, and determines, according to the small data indication, the small data that uses the MCCH to carry the weather forecast service.

 E-UTRAN

Each eNB in the air forecasting service configures the parameters of the MCCH, and indicates that the eNB carries the data in the MCCH message, and considers the delay in which the MBMS GW sends data to the eNB and the eNB encapsulates the data to the MCCH when configuring the MCCH Update Time.

 Step 508: The E-UTRAN performs IP address multicast join for subsequent MBMS data transmission.

 Step 509 to step 510, MBMS data transmission.

 Corresponding to step 508, step 509 to step 510, after receiving the MCCH configuration from the MCE, the eNB receives the small data content sent by the MBMS GW.

The eNB encapsulates the content of the small data in a new cell in the PMCH-info cell body on the MCCH channel, and configures the service identifier corresponding to the small data in the cell (weather pre- Reporting service identifier); The cell length is variable to accommodate the transmission of small data of different sizes. When the MCCH Update Time arrives, the eNB carries the Small Data content in the MCCH message and broadcasts on the MCCH channel of the air interface.

 The UE that receives the MBSFN Area Configuration message may determine whether to acquire the small data content according to the service identifier of the new cell in the PMCH-info cell.

 The UE that subscribes to the weather forecast service receives the MCCH message according to the preset period, and reads the small data content according to the service identifier (weather forecast service identifier) corresponding to the small data, and obtains the updated weather forecast data.

 In the existing system, in order to further reduce the power consumption caused by the UE periodically reading the MCCH signaling content, the LTE system simultaneously proposes an MBMS Notification (MBMS Notification) mechanism, and uses physical layer signaling to indicate whether the MCCH information will be changed. . The UE only needs to monitor the MBMS notification indication. According to the content indicated by the MBMS notification, the UE then decides whether to receive the MCCH information, thereby saving power. The UE periodically monitors the MBMS notification indication information according to the configured MCCH modification period and the MBMS notification indicating the number of information transmission times and the subframe position. According to whether the specific bit in the MBMS Notification is set to trigger the reading of the corresponding MCCH, the service information (including the service identifier and the service configuration information) configured in the MCCH is obtained, and whether the service is a service that is of interest to the user is determined to determine whether the service is Receive.

 In combination with the foregoing process, the UE that subscribes to the weather forecast service in the embodiment of the present invention may also listen to the MBMS notification according to a preset period, and trigger the terminal to receive the MCCH message at a specific time point according to the content of the notification, and corresponding to the small data according to the same. The business identifier (weather forecast service identifier), the content of the small data is read, and the updated weather forecast data is obtained.

 The BM-SC, the MBMS GW, the MME, the MCE, and the eNB can determine whether the data is successfully sent according to the size information of the weather forecast service data, thereby releasing the corresponding connection, and does not need to execute the displayed Session Stop process, thereby saving signaling overhead. .

What needs to be pointed out here is: When the MBS system architecture based on 3G design, the session starts to flow The process is similar to the above-mentioned session start process based on the LTE system design, except that the network entity is different, the MME is replaced with the SGSN, and the E-UTRAN is replaced with the UTRAN. That is to say, the method in the embodiment of the present invention is applicable to the case where the access network is E-UTRAN and the case where the access network is UTRAN.

 Embodiment 3: Taking E-UTRAN as an example, the mode in which the eNB transmits group data on the MCCH channel is the foregoing third transmission mode, that is, a message is newly added in the MCCH channel to carry small data.

 After the M2M server is added as the content provider, the locations of the components in the system architecture are different. Only the newly added M2M server can be connected to the BM-SC.

 The user subscribes to the service provider with a weather forecast service, and the service identifier is No.N; further, the service identifier No.N may correspond to a specific TMGI, or an MBMS Service ID and a Session ID; or directly use TMGI. As a business identifier. The weather forecast service updates data every two hours, with an amount of data of approximately 500 bits per update.

 The service provider provides the weather forecast service data to the user through the operator's network, and the user receives the data through the terminal device. Since many users subscribe to the weather forecast service, the content received by each user when the data is updated is the same. In order to save network resources, the data can be transmitted through the group data transmission method.

 The service server of the service provider is connected to the BM-SC entity of the operator, and the service server sends a group data transmission request to the BM-SC, and indicates that this is a small data, and the data size is 1K bit, and the service identifier is No.N. Information such as the scope of the sending area (based on the approximate location of the subscriber and the validity of the service);

 In addition to the existing functions, the BM-SC also implements the mapping of service identifiers and the selection of transmission modes. Optionally, the BM-SC converts the No.N into a TMGI, or an MBMS Service ID and a Session ID, according to a preset identifier mapping relationship.

If the service is directly identified by TMGI, the above-mentioned identity-based mapping is not required. The identity conversion process performed by the relationship.

 Similar to the first embodiment process shown in FIG. 5, the difference is that, unlike the MCCH channel configuration in the step 407 of the first embodiment, a message is newly added to the MCCH channel to carry small data.

 The session start process of this embodiment includes the following steps:

 Step 601: The BM-SC initiates a Session Start Request, and sends a Session Start Request to the MBMS GW.

 Here, the σ small data indication cell is added to the Session Start Request message, and includes information such as small data indication information, data size, and the like. Then follow the normal process for the session establishment process.

 Step 602: The MBMS GW returns a Session Start Response to the BM-SC.

 Step 603: The MBMS GW sends a Session Start Request to the MME.

 Here, the Session Start Request still carries the small data indication of the booster port. Step 604: The MME sends a Session Start Request to the E-UTRAN.

 Here, the Session Start Request still carries the small data indication of the booster port. Step 605: The E-UTRAN returns a Session Start Response to the MME.

 Step 606: The MME returns a Session Start Response to the MBMS GW.

 Step 607: The E-UTRAN executes RAN Resource Setup.

 Here, the RAN Resource Setup specifically includes:

 The MCE in the E-UTRAN receives the Session Start Request message, and determines, according to the small data indication, the small data that uses the MCCH to carry the weather forecast service.

The MCE configures the MCCH parameters for each eNB in the weather pre-service area by using the MBMS SCHEDULING INFORMATION, instructs the eNB to carry the data in the MCCH message, and considers that the MBMS GW sends data to the eNB and the eNB when configuring the MCCH Update Time. The delay of data to MCCH. Step 608: The E-UTRAN performs IP address multicast join for subsequent MBMS data transmission.

 Step 609 to step 610, MBMS data transmission.

 Corresponding to step 608, step 609 to step 610, after receiving the MCCH configuration from the MCE, the eNB receives the small data content sent by the MBMS GW.

 The eNB encapsulates the content of the small data in a new MCCH message, and configures the service identifier corresponding to the small data (the weather pre-service identifier) in the message; the length of the message is variable to suit different sizes of small data. transmission.

 When the MCCH Update Time arrives, the eNB carries the small data content in the new MCCH message and broadcasts on the MCCH channel of the air interface.

 The UE that receives the new MCCH message may determine whether to acquire the small data content according to the service identifier in the new MCCH message.

 The UE that subscribes to the weather forecast service receives the MCCH message according to the preset period, and reads the small data content according to the service identifier (weather forecast service identifier) corresponding to the small data, and obtains the updated weather forecast data.

 In the existing system, in order to further reduce the power consumption caused by the UE periodically reading the MCCH signaling content, the LTE system simultaneously proposes an MBMS Notification (MBMS Notification) mechanism, and uses physical layer signaling to indicate whether the MCCH information will be changed. . The UE only needs to monitor the MBMS notification indication. According to the content indicated by the MBMS notification, the UE then decides whether to receive the MCCH information, thereby saving power. The UE periodically monitors the MBMS notification indication information according to the configured MCCH modification period and the MBMS notification indicating the number of information transmission times and the subframe position. According to whether the specific bit in the MBMS Notification is set to trigger the reading of the corresponding MCCH, the service information (including the service identifier and the service configuration information) configured in the MCCH is obtained, and whether the service is a service that is of interest to the user is determined to determine whether the service is Receive.

In combination with the foregoing process, the terminal subscribed to the weather forecast service in the embodiment of the present invention may also The MBMS notification is monitored according to a preset period, and the content of the notification is used to trigger the terminal to receive the MCCH message at a specific time point, and according to the service identifier (weather forecast service identifier) corresponding to the small data, the content of the small data is read, and the content is obtained. Updated weather forecast data.

 The BM-SC, the MBMS GW, the MME, the MCE, and the eNB can determine whether the data is successfully sent according to the size information of the weather forecast service data, thereby releasing the corresponding connection, and does not need to execute the displayed Session Stop process, thereby saving signaling overhead. .

 It should be pointed out here that: Based on the MBS system architecture of 3G design, the session start process is similar to the above-mentioned session start process based on the LTE system design, except that the network entity is different, replacing the MME with the SGSN, and replacing the E-UTRAN with UTRAN can be. That is to say, the method in the embodiment of the present invention is applicable to the case where the access network is E-UTRAN and the case where the access network is UTRAN.

 Embodiment 4: Taking UTRAN as an example, there are three ways for NodeB to transmit group data on the MCCH channel.

 After the M2M server is added as the content provider, the locations of the components in the system architecture are different. Only the newly added M2M server can be connected to the BM-SC.

 In UTRAN, the architecture of the MBMS system is somewhat different from that of LTE. The configuration of the MCCH channel in LTE is controlled by the Radio Network Controller (RNC), which is equivalent to the function of MCE in LTE. The session start procedure in the first, second, and third embodiments above is also applicable to the UTRAN system. The details will not be described in detail.

 The network entity implemented for the difference of the architecture is different. In the UTRAN, the MCCH channel parameters are configured by the RNC, and the base station NodeB performs data transmission according to the configuration of the RNC. The small data carried in the air interface may be an existing MCCH message or a new one. MCCH message.

 Here, the manner in which the NodeB transmits group data on the MCCH channel includes the following three types:

1) Add a cell to the existing MBMS Modified services information, carrying _sma ll data; 2) adding a cell to the existing MBMS current cell PTM RB information, carrying small data;

 3) A new message is added to the MCCH channel to carry small data, such as the new MBMS small data RB information.

 In the following, taking UTRAN as an example, a complete session start process, as shown in Figure 6, includes the following steps:

 Step 701: The BM-SC initiates a Session Start Request, and sends a Session Start Request to the MBMS GW.

 Here, the σ small data indication cell is added to the Session Start Request message, and includes information such as small data indication information, data size, and the like. Then follow the normal process for the session establishment process.

 Step 702: The MBMS GW returns a Session Start Response to the BM-SC.

 Step 703: The MBMS GW sends a Session Start Request to the SGSN.

 Here, the Session Start Request still carries the small data indication of the booster port. Step 704: The SGSN sends a Session Start Request to the UTRAN.

 Here, the Session Start Request still carries the small data indication of the booster port. Step 705: The UTRAN returns a Session Start Response to the SGSN.

 Step 706: The SGSN returns a Session Start Response to the MBMS GW.

 Step 707: The UTRAN executes RAN Resource Setup.

 Here, the RAN Resource Setup specifically includes:

 The RNC in the UTRAN receives the Session Start Request message, and determines to use the MCCH to carry the small data according to the small data indication.

The RNC configures the MCCH parameters for each NodeB in the service range by using the MBMS SCHEDULING INFORMATION, instructs the NodeB to carry the small data in the MCCH message, and considers that the MBMS GW sends data to the NodeB when configuring the MCCH Update Time. The delay that the NodeB encapsulates the data into the MCCH.

 Step 708: The UTRAN performs IP address multicast join for subsequent MBMS data transmission.

 Step 709 to step 710, MBMS data transmission.

 Corresponding to step 708, step 709 to step 710, after receiving the MCCH configuration from the RNC, the NodeB receives the small data content sent by the MBMS GW.

 The NodeB encapsulates the small data content in the MCCH message by using any of the foregoing three methods for transmitting the group data, and configures the service identifier corresponding to the small data in the message; the length of the message is variable to be suitable. Transmission of small data of different sizes.

 When the MCCH Update Time arrives, the NodeB carries the small data content in the MCCH message and broadcasts on the MCCH channel of the air interface.

 The UE that receives the MCCH message may determine whether to acquire the small data content according to the service identifier in the MCCH message.

 A group small data sending system includes a group small data transmitting device on the network side, configured to transmit group small data to the UE through the MBMS system, and carry the group small data through the MCCH message in the air interface.

 Here, the group small data transmitting device includes: an M2M server, a BM-SC. The M2M server is configured to send a group data transmission request to the BM-SC. The BM-SC is configured to determine to use the MCCH message to carry small data according to the small data indication encapsulated in the group data transmission request, and perform MBMS session transmission, and transmit the small data to the UE.

 Here, the group data transmission request specifically includes: small data indication, and/or service identifier, and/or group identifier, and/or data transmission range, and/or data characteristics, and/or data retransmission times.

Here, the small data indication specifically includes: small data indicating information, and/or data Size information.

Here, the group small data transmitting apparatus further includes: an MBMS GW, an MME, and an E-UTRAN. The BM-SC is further configured to initiate a Session Start Request, and send the Session Start Request to the MBMS GW; and encapsulate the small data indication in the Session Start Request. The MBMS GW is configured to: after receiving the Session Start Request, return a Session Start Response to the BM-SC; send the Session Start Request to the MME; and receive a Session Start Response ₀ MME returned by the MME, configured to receive the Session After the Start Request, the Session Start Request is sent to the E-UTRAN; the Session Start Response returned by the E-UTRAN is received and returned to the MBMS GW. The E-UTRAN is configured to return a Session Start Response to the MME; perform RAN Resource Setup; IP address multicast join; and transmit the small data in the form of MBMS data to the UE.

 Here, the E-UTRAN is further configured to: after receiving the Session Start Request by the MCE in the E-UTRAN, determine, according to the small data indication therein, that the MCCH message is used to carry the small data; and the MCE is to transmit the small data. Each eNB in the service area configures MCCH parameters, and instructs the eNB to carry the small data in the MCCH message.

Here, the group small data transmitting apparatus further includes: an MBMS GW, an SGSN, and a UTRAN. The BM-SC is further configured to initiate a Session Start Request, and send the Session Start Request to the MBMS GW; encapsulate the small data indication ₀ MBMS GW in the Session Start Request, and configure to receive the Session Start Request, and then return The Session Start Response is sent to the BM-SC; the Session Start Request is sent to the SGSN; and the Session Start Response ₀ SGSN returned by the SGSN is received, and after receiving the Session Start Request, the Session Start Request is sent to the UTRAN; The Session Start Response returned by UTRAN and returned to the MBMS GW. UTRAN, configured to return a Session Start Response to the SGSN; perform RAN Resource Setup; IP address multicast force port; transmit small data in the form of MBMS data to the UE. Here, the UTRAN is further configured to: after receiving the Session Start Request by the RNC in the UTRAN, determine, according to the small data indication therein, that the MCCH message is used to carry the small data; and the RNC transmits the service within the service range of the small data. Each NodeB configures an MCCH parameter, instructing the NodeB to carry the small data in the MCCH message.

 The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Industrial applicability

 The embodiment of the present invention uses an MBMS system to transmit a group small data service by using an MBMS transmission mechanism, and can implement point-to-multipoint data transmission, which is different from the prior art point-to-point transmission mode. The existing MBMS transmission mechanism is used to implement the point-to-multipoint transmission mode, and the small data service is carried on the MBMS point-to-multipoint control channel (MCCH) channel, and is sent to the UE without a large amount of signaling overhead and network resources. , improve the efficiency of data transmission, and the implementation complexity is not high.

Claims

claims 1. A method for sending group small data. The method includes: transmitting the group small data to the UE through the multimedia broadcast and multicast service MBMS system, wherein the multimedia broadcast and multicast service point-to-multipoint control is performed on the air interface. The channel MCCH message carries group small data. 2. The method according to claim 1, wherein the transmitting the group small data to the UE through the MBMS system and carrying the group small data through the MCCH message on the air interface specifically includes: the broadcast multicast service center BM-SC receives Group data transfer request sent to the machine-to-machine M2M server; According to the small data indication related to the small data encapsulated in the group data transmission request, it is determined that the MCCH message is used to carry the group small data, and MBMS session transmission is performed to transmit the small data to the UE. 3. The method according to claim 2, wherein the group data transmission request specifically includes: the small data indication, and/or service identification, and/or group identification, and/or data transmission range, And/or data characteristics, and/or data size information, and/or the number of times data is repeatedly sent. 4. The method according to claim 2, wherein the small data indication specifically includes: small data indication information, and/or data amount size information. 5. The method according to claim 4, wherein the determining according to the small data indication to use the MCCH message to carry small data specifically includes: learning that the current group data is small according to the small data indication information in the small data indication. data, determine to use the MCCH message to carry small data; After the small data is transmitted to the UE, the method further includes: learning that the current group data is small data according to the data volume information, and automatically releasing the resources and channels occupied by the transmission after the small data transmission is completed. The MBMS session end signaling process needs to be performed. 6. The method according to claim 3, wherein the service identifier is specifically the user's direct The business identifier of the subscribed business; or, The service identifier specifically corresponds to the temporary mobility group identifier TMGI, forming a mapping relationship; or, the TMGI is directly used as the service identifier; or, The service identifier specifically corresponds to the MBMS service identifier, forming a mapping relationship. 7. The method according to any one of claims 2 to 6, wherein when the access network is the Evolved Universal Terrestrial Radio Access Network E-UTRAN, the method specifically includes: The BM-SC initiates a Session Start Request, sends the Session Start Request to the MBMS GW; encapsulates the small data indication in the Session Start Request; The MBMS GW returns the Session Start Response in response to the session start request to the BM-SC; the MBMS GW sends the Session Start Request to the mobility management entity MME; the MME sends the Session Start Request to the E-UTRAN; the E -UTRAN returns Session Start Response to MME; MME returns Session Start Response to MBMS GW; E-UTRAN performs resource allocation and channel configuration RAN Resource Setup; IP address multicast join; transmits small data in the form of MBMS data to the UE. 8. The method according to claim 7, wherein the E-UTRAN executing the RAN Resource Setup specifically includes: having the multi-cell multicast coordination entity MCE in the E-UTRAN receive the Session Start Request. , according to the small data indication, it is determined that the MCCH message is used to carry the small data; the MCE configures MCCH parameters for each enhanced base station eNB within the small data transmission service range, and instructs the eNB to carry the small data in the MCCH message. 9. The method according to claim 8, wherein the method of using the MCCH message to carry the small data specifically includes any of the following methods: Configure MBSFN Area in the existing multimedia broadcast and multicast service single frequency network area The Configuration message adds σ—a cell, carrying small data; Add an information element to the existing physical multicast channel information PMCH-info message, carrying small data; A new message is added to the MCCH channel, carrying small data. 10. The method according to any one of claims 2 to 6, wherein when the access network is the Universal Mobile Communications System Terrestrial Radio Access Network UTRAN, the method specifically includes: The BM-SC initiates a Session Start Request, sends the Session Start Request to the MBMS GW; encapsulates the small data indication in the Session Start Request; The MBMS GW returns the Session Start Response to the BM-SC; the MBMS GW sends the Session Start Request to the General Packet Radio Service Support Node SGSN; the SGSN sends the Session Start Request to the UTRAN; the UTRAN returns the Session Start Response to SGSN; SGSN returns Session Start Response to MBMS GW; UTRAN performs RAN Resource Setup; IP address multicast join; transmits small data in the form of MBMS data to the UE. 11. The method according to claim 10, wherein the UTRAN executing the RAN Resource Setup specifically includes: after receiving the Session Start Request, the radio network controller RNC in the UTRAN performs the Session Start Request according to the small data therein. The indication determines that the MCCH message is used to carry the small data; the RNC configures MCCH parameters for each base station NodeB within the small data transmission service range, and instructs the NodeB to carry the small data in the MCCH message. 12. The method according to claim 11, wherein the method of using the MCCH message to carry the small data specifically includes any of the following methods: Add the existing MBMS modified service information MBMS Modified services information Add a cell to carry small data; Add a cell to the existing MBMS current cell point-to-multipoint radio bearer information MBMS current cell PTM RB information, carrying small data; A new message is added to the MCCH channel, carrying small data. 13. A system for sending group small data. The system includes a group small data sending device on the network side, configured to transmit the group small data to the UE through the MBMS system, wherein the group small data is carried on the air interface through the MCCH message. data. 14. The system according to claim 13, wherein the group small data sending device includes: M2M server, BM-SC; wherein, The M2M server is configured to send a group data transmission request to the BM-SC; the BM-SC is configured to determine to use the MCCH message to carry the message based on the small data indication encapsulated in the group data transmission request. small data, and performs MBMS session transmission to transmit the small data to the UE. 15. The system according to claim 14, wherein the group data transmission request specifically includes: the small data indication, and/or service identification, and/or group identification, and/or data transmission range, And/or data characteristics, and/or data size information, and/or the number of times data is repeatedly sent. 16. The system according to claim 14, wherein the small data indication specifically includes: small data indication information, and/or data amount size information. 17. The system according to claim 14, wherein the group small data sending device further includes: MBMS GW, MME, E-UTRAN; The BM-SC is further configured to initiate a Session Start Request, send the Session Start Request to the MBMS GW; encapsulate the small data indication in the Session Start Request; The MBMS GW is configured to return after receiving the Session Start Request. Session Start Response to BM-SC; send the Session Start Request to the MME; receive the Session Start Response returned by the MME; The MME is configured to send the Session Start Request to E-UTRAN after receiving the Session Start Request; receive the Session Start Response returned by the E-UTRAN and return it to the MBMS GW; The E-UTRAN is configured to return Session Start Response to the MME; execute RAN Resource Setup; IP address multicast join; and transmit small data in the form of MBMS data to the UE. 18. The system according to claim 17, wherein the E-UTRAN is further configured such that after receiving the Session Start Request, the MCE in the E-UTRAN determines to use the MCCH message based on the small data indication therein. To carry the small data; the MCE configures MCCH parameters for each eNB within the small data transmission service range, and instructs the eNB to carry the small data in the MCCH message. 19. The system according to claim 14, wherein the group small data sending device further includes: MBMS GW, SGSN, UTRAN; The BM-SC is further configured to initiate a Session Start Request, send the Session Start Request to the MBMS GW; encapsulate the small data indication in the Session Start Request; The MBMS GW is configured to return the Session Start Response to the BM-SC after receiving the Session Start Request; send the Session Start Request to the SGSN; receive the Session Start Response returned by the SGSN; The SGSN is configured to send the Session Start Request to UTRAN after receiving the Session Start Request; receive the Session Start Response returned by the UTRAN and return it to the MBMS GW; The UTRAN is configured to return Session Start Response to SGSN; execute RAN Resource Setup; IP address multicast join; transmit small data in the form of MBMS data to UE. 20. The system according to claim 19, wherein the UTRAN is further configured such that after receiving the Session Start Request, the RNC in the UTRAN determines to use the MCCH message to carry the Session Start Request based on the small data indication therein. Small data: The RNC configures MCCH parameters for each NodeB within the small data transmission service range, and instructs the NodeB to carry small data in the MCCH message.