CN101997898B - Method and system for M2M (Machine to Machine) application server to send data packet - Google Patents

Abstract

The present invention discloses a method and system for sending data packets by an M2M application server, wherein the method includes: the M2M application server obtains the group identifier of the target group; Obtaining the IPv6 address prefix corresponding to the group identifier of the target group; the M2M application server sends a data packet to the GGSN serving the target group according to the IPv6 address prefix, and the data packet carries IPv6 address prefix. In the embodiment of the present invention, an IPv6 address prefix is assigned to the group in the M2M application, and the group identifier of the destination group is obtained through the IPv6 address prefix, and the data packet is sent to the GGSN serving the group identifier, thereby realizing Sending data packets to the M2M application terminals in the group saves IP address resources.

Description

Method and system for sending data packets by M2M application server

technical field

The present invention relates to communication technology, in particular to a method and system for sending data packets by an M2M application server, and also to an M2M application server and a GGSN.

Background technique

Machine to Machine (M2M for short) application refers to the network communication between one or more network elements without human participation, such as traffic control and management, factory monitoring, remote meter reading and other applications . In the M2M application, multiple M2M application terminals with the same M2M application (the English corresponding to the M2M application terminal can be M2M Equipment, M2M Device, or Machine Type Communication Device, etc.) form a whole, referred to as a group. Network operators or industry users can manage and control the group as a whole. For example, the remote meter reading application in the electric power industry can form all electric meters in a city into a group, and network operators and electric power industry users can perform mobility management optimization or access management on the group as a whole.

In H2H (Human to Human, referred to as H2H) applications, if the network side needs to deliver data packets to user equipment (UE), and there is no such UE in the gateway GPRS support node (GatewayGPRS Support Node, referred to as GGSN) Packet Data Protocol (PDP for short) context information, the GGSN needs to query the configuration information of the static address stored in itself according to the destination address of the data packet (Data Packet) (ie, the address of the UE). If the address of the UE is queried in the configuration information, the GGSN obtains the UE's International Mobile Identity (International Mobile Subscribers Identification Number, IMSI) information according to the queried static address mapping, and the GGSN queries the home location register (HLR) according to the obtained IMSI information. HomeLocation Register, referred to as HLR), obtains the information of the serving GPRS support node (ServingGPRS Support Node, referred to as SGSN) attached to the UE, and the subsequent GGSN will initiate an activation process initiated by the network side to establish a context for the UE, and the Packet Data Network (Packet Data Network) , PDN for short) data packet delivery.

In M2M applications, if the operator needs to multicast the M2M application terminals through Multimedia Broadcast Multicast Service (MBMS) or Cell Broadcast Center (CBC) To send data packets, due to the large number of M2M application terminals, according to the H2H processing mechanism, the GGSN needs to configure the relationship between the M2M application terminal identifier and the M2M application terminal IP address for each M2M application terminal, which will consume a lot of IP address resources.

Contents of the invention

Aiming at the problems existing in the prior art, the embodiments of the present invention provide a method and a system for sending data packets by an M2M application server, and provide an M2M application server and a GGSN, which can save the IP address assigned to the M2M application terminal in the M2M application. address.

An embodiment of the present invention provides a method for sending a data packet by an M2M application server, including:

The M2M application server obtains the group identifier of the target group;

The M2M application server acquires the IPv6 address prefix corresponding to the group identifier of the target group according to the correspondence between the IPv6 address prefix and the group identifier;

The M2M application server sends a data packet to the GGSN serving the destination group according to the IPv6 address prefix, and the data packet carries the IPv6 address prefix.

The embodiment of the present invention also provides a method for sending a data packet by an M2M application server, including:

The M2M application server obtains the group identifier of the target group;

The M2M application server obtains the IPv4 address corresponding to the group identifier of the target group according to the correspondence between the IPv4 address and the group identifier;

The M2M application server sends a data packet to the GGSN serving the destination group according to the IPv4 address, and the data packet carries the IPv4 address.

The embodiment of the present invention also provides an M2M application server, including:

The first obtaining module is used to obtain the group identifier of the target group;

The second obtaining module is connected with the first obtaining module, and is used to obtain the IPv6 address prefix corresponding to the group identification of the target group obtained by the first obtaining module according to the corresponding relationship between the IPv6 address prefix and the group identification; Or according to the corresponding relationship between the IPv4 address and the group identifier, obtain the IPv4 address corresponding to the group identifier of the target group obtained by the first obtaining module;

The first sending module is connected with the second obtaining module, and is used to send the data packet to the GGSN serving the target group according to the IPv6 address prefix obtained by the second obtaining module, the data packet carrying an IPv6 address prefix; or for sending a data packet to the GGSN serving the target group according to the IPv4 address obtained by the second obtaining module, the data packet carrying an IPv4 address.

The embodiment of the present invention also provides a GGSN, including:

The first receiving module is configured to receive the data packet sent by the M2M application server;

The third obtaining module is connected with the first receiving module, and is used to obtain the IPv6 address prefix in the data packet received by the first receiving module, and obtain the destination group according to the correspondence between the IPv6 address prefix and the group identifier or for obtaining the IPv4 address in the data packet received by the first receiving module, and obtaining the group identifier of the destination group according to the correspondence between the IPv4 address and the group identifier;

The second sending module is respectively connected to the third obtaining module and the first receiving module, and receives the first receiving module according to the group identifier of the target group obtained by the third obtaining module The data packets are sent to the destination group.

The embodiment of the present invention also provides a system for sending data packets by an M2M application server, including the above-mentioned M2M application server and the above-mentioned GGSN, the first sending module is connected to the first receiving module .

In various embodiments of the present invention, an IPv6 address prefix or IPv4 address is assigned to a group in an M2M application, and the group identifier of the destination group is obtained through the IPv6 address prefix or IPv4 address, and the data packet is sent to the group identifier service GGSN, so that data packets can be sent to the M2M application terminals in the group, saving IP address resources.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

FIG. 1 is a schematic structural diagram of a wireless evolution network involved in an embodiment of the present invention;

FIG. 2 is a schematic diagram of extending the functions of the M2M application server and the GGSN protocol stack in the embodiment of the present invention;

FIG. 3 is a flow chart of Embodiment 1 of a method for delivering a data packet by an M2M application server according to the present invention;

FIG. 4 is a flow chart of Embodiment 2 of a method for delivering a data packet by an M2M application server according to the present invention;

FIG. 5 is a schematic structural diagram of an embodiment of an M2M application server in the present invention;

Fig. 6 is a schematic diagram showing the structure of the GGSN embodiment of the present invention.

Detailed ways

As shown in Figure 1, it is a schematic structural diagram of a wireless evolution network involved in the embodiment of the present invention, which mainly includes: a Mobility Management Entity (MME for short) 11, a Serving Gateway (S-GW for short) 12 and Packet DataNetwork Gateway (P-GW for short) 13, in which MME 11 is responsible for non-access stratum (Non access stratum, NAS for short) signaling encryption, roaming and tracking, assigning user temporary identities, security functions, etc., MME 11 Corresponding to the control plane part of the Serving GPRS Support Node (SGSN) within the current Universal Mobile Telecommunications System (UMTS) system; S-GW12 is responsible for the local mobility anchor point and the internal 3GPP system Mobility anchor point and lawful interception related information; P-GW13 is responsible for policy execution and billing and lawful interception related functions; Dynamic Host Configuration Protocol (Dynamic Host Configuration Protocol, referred to as DHCP) server 16 is mainly used to manage dynamic IP address allocation and Other related environment configuration work, such as: Domain Name System (DomainName System, referred to as DNS), naming service (Windows Internet Naming Server, referred to as WINS) and GGSN settings), can be independently configured by the operator and connected to MME11.

The application network 14 is connected to the P-GW 13, and the application network 14 is used to provide various services for a user terminal (User Equipment, UE for short) 15.

If the network structure shown in FIG. 1 is adopted in the M2M application, the M2M application terminal (eg, M2ME, MTC terminal or M2M device) is equivalent to UE15, the M2M application server is equivalent to application network 14, and the GGSN is equivalent to P-GW13. The M2M server distributes data packets to each M2M application terminal.

In M2M applications, the number of M2M application terminals is huge. If IP addresses are respectively configured for each M2M application terminal, many IP addresses are needed, but IP address resources are limited. In an M2M application, multiple M2M application terminals can form a group.

Mode 1, if it is necessary to send data packets to all M2M application terminals in a group, the M2M application server can obtain the group identifier of the group, and according to the correspondence between the IPv6 address prefix and the group identifier, it can send the data packet to the group The group is assigned an IPv6 address prefix. The group identifier is an identifier used to identify a group or a user group, and is a user group identifier (also can be described as a user group user identifier) or a group identifier (also can be described as a group user identifier), or other Indicates the identity of the group or user group to which the user equipment belongs. For example, if the group or user group to which the user equipment belongs is identified by the APN, the APN is the identity of the group or user group to which the user equipment belongs. The present invention does not limit the group identity. The group or user group may be a user equipment group or an M2M industry user (MTC User) or an M2M application subscriber (MTC Subscriber) or other groups composed of multiple devices, which is not limited in the present invention. The M2M application server can address the GGSN serving the group according to the IPv6 address prefix, and send a data packet to the GGSN, and the data packet can carry the IPv6 address prefix. After the GGSN receives the data packet sent by the M2M application server, the GGSN can obtain the IPv6 address prefix in the data packet, so that according to the correspondence between the IPv6 address prefix and the group identifier, the group identifier corresponding to the IPv6 prefix can be obtained, and the The group delivers data packets in the form of MBMS or CBC.

If it is necessary to send a data packet to an M2M application terminal in the group, the M2M application server can obtain the group identifier of the group and the identifier (such as IMSI) of the M2M application terminal, and according to the correspondence between the IPv6 address prefix and the group identifier , and the corresponding relationship between the interface identifier of the IPv6 address and the terminal identifier of each M2M application terminal in the group, an IPv6 address prefix can be assigned to the group, and the interface identifier of the IPv6 address can be assigned to the M2M application terminal in the group. The M2M application server can address the GGSN serving the group according to the IPv6 address prefix and the interface identifier of the IPv6 address, and send a data packet to the GGSN, and the data packet can carry the IPv6 address prefix and the IPv6 address Interface ID. After receiving the data packet sent by the M2M application server, the GGSN can obtain the IPv6 address prefix and the interface identifier of the IPv6 address in the data packet, so that according to the corresponding relationship between the IPv6 address prefix and the group identifier, as well as the interface identifier of the IPv6 address and the The corresponding relationship between the terminal identifiers of the M2M application terminals in the group is to obtain the target group identifier and the terminal identifier of a certain M2M application terminal under the group. If the GGSN does not have the context information of the M2M application terminal, it can submit at least one of the acquired group identifier or the terminal identifier of the M2M application terminal to the subscription database (such as HLR, Home Subscriber Server (HSS for short), or the group subscription database serving the M2M) or the M2M application server obtains the core management network element (such as SGSN, MSC, or MME) serving the M2M application terminal, and initiates a PDP context activation process.

The corresponding relationship between the IPv6 address prefix and the group identifier and the corresponding relationship between the interface identifier of the IPv6 address and the terminal identifier of the M2M application terminal can be signed in the subscription database as the subscription data of the group, or can be pre-configured in the M2M application server, GGSN or In network-side NEs such as the DHCP server. The subscription database can be HLR, HSS or a group subscription database dedicated to M2M services. From the GGSN, the M2M application server or the DHCP server, the correspondence between the IPv6 address prefix and the group identifier and the correspondence between the interface identifier of the IPv6 address and the terminal identifier of the M2M application terminal can be obtained. The corresponding relationship between the IPv6 address prefix and the group identifier, and the corresponding relationship between the interface identifier of the IPv6 address and the terminal identifier of the M2M application terminal can be a list of relationships, or an algorithm, such as a hash (HASH) algorithm, Logical addition, etc.

When assigning an interface identifier of an IPv6 address to each M2M application terminal, an interface identifier of an IPv6 address can be assigned to each M2M application terminal according to certain principles, such as using algorithms such as logical addition or logical subtraction, or other algorithms can also be adopted , as long as an M2M application terminal can be addressed according to the interface identifier of the IPv6 address.

Mode 2, if it is necessary to send data packets to all M2M application terminals in a group, the M2M application server can obtain the group ID of the group, and assign a group ID to a group according to the correspondence between the IPv4 address and the group ID. IPv4 address. The M2M application server can address the GGSN serving the group according to the IPv4 address, and send a data packet to the GGSN, and the data packet can carry the IPv4 address. After the GGSN receives the data packet sent by the M2M application server, it can obtain the group identifier corresponding to the IPv4 address in the data packet according to the correspondence between the IPv4 address and the group identifier, so as to deliver the data packet to the group in the form of It can be MBMS or CBC.

If it is necessary to send a data packet to an M2M application terminal in the group, the protocol stack function between the GGSN and the M2M application server can be extended, so that the data packet delivered by the M2M application server can carry the identification information of the M2M application terminal, For example, International Mobile Subscribers Identification Number (IMS I for short). Figure 2 is a schematic diagram of extending the functions of the M2M application server and the GGSN protocol stack in the embodiment of the present invention. It can be seen from the figure that on the side of the M2M application server, a key carrying the identification information of the M2M application terminal is added at the top layer. function, that is to say, by compressing the data packet, the data packet sent by the M2M application server can carry the identification information of the M2M application terminal, and the function of parsing the identification information of the M2M application terminal is added on the GGSN side, so that the GGSN can When the data packet sent by the M2M application server is received, the identification information of the M2M application terminal in the data packet can be parsed out.

The corresponding relationship between the IPv4 address and the group identifier can be signed in the subscription database as the subscription data of the group, or can be pre-configured in network elements such as the M2M application server, GGSN or DHCP server. The group subscription database can be HLR, HSS or a subscription database (such as a group subscription database) dedicated to M2M services. The corresponding relationship between the IPv4 address and the group identifier can be obtained from the GGSN, the M2M application server, or the DHCP server. The corresponding relationship between the IPv4 address and the group identifier may be a relationship list, or an algorithm, such as a hash (HASH) algorithm, a logical addition algorithm, and the like.

As shown in Figure 3, it is a flow chart of Embodiment 1 of the method for sending data packets by the M2M application server of the present invention, including:

Step 101, the M2M application server acquires the group ID of the target group. The destination group is the group to receive the data packet.

Step 102, the M2M application server acquires the IPv6 address prefix corresponding to the group identifier of the target group according to the correspondence between the IPv6 address prefix and the group identifier. The M2M application server itself may configure the correspondence between the IPv6 address prefix and the group identifier, or the M2M application server may acquire the correspondence between the two from network-side entities such as HSS, HLR, and group subscription database.

Step 103, the M2M application server sends the data packet to the GGSN serving the target group according to the IPv6 address prefix. Specifically, the M2M application server addresses the GGSN serving the target group according to the IPv6 address prefix, and sends a data packet to the GGSN, and the data packet may carry the IPv6 address prefix. The embodiment shown in Figure 3 may also include:

Step 104, GGSN obtains the IPv6 address prefix in the data packet, obtains the group identifier of the destination group according to the correspondence between the IPv6 address prefix and the group identifier, and sends the data packet to the destination group. Wherein, the GGSN may send the data packet to the destination group according to the group identifier of the destination group, and the delivery method may be MBMS or CBC. For example, in the session start procedure (SessionStart procedure) under the MBMS mechanism, the GGSN sends the MBMS session start request (MBMS SessionStart Request) message to the SGSN, and the group identifier of the target group can be carried in the MBMS session start request message; The group identifier obtains the service area of the M2M terminal of the target group and the radio network subsystem (Radio Network Subsystem, RNC for short); and sends the data packet to the target group. Specifically, according to the processing mechanism of MBMS, the data packet can be sent to the destination terminal within the scope of the service area and the wireless network subsystem. The service area corresponds to the wireless network subsystem.

Embodiment 1 may also include: the M2M application server acquires the identifier of the M2M application terminal in the destination group, and acquires the corresponding IPv6 address of the M2M application terminal according to the corresponding relationship between the interface identifier of the IPv6 address and the identifier of each M2M application terminal in the destination group the interface identifier of the IPv6 address; the data packet sent by the M2M application server to the GGSN serving the target group also carries the interface identifier of the IPv6 address.

After step 103, it may also include that the GGSN obtains the IPv6 address prefix and the interface identifier of the IPv6 address in the data packet, according to the corresponding relationship between the IPv6 address prefix and the group identifier, and the interface identifier of the IPv6 address and the identifier of each M2M application terminal in the group The corresponding relationship between, obtain the group identifier of the destination group and the terminal identifier of the M2M application terminal corresponding to the interface identifier of the IPv6 address in the destination group, and send the data packet to the M2M application terminal corresponding to the interface identifier of the IPv6 address.

In step 104, the data packet is sent to the M2M application terminal corresponding to the interface identifier of the IPv6 address, which may specifically include: if the context information of the M2M application terminal exists in the GGSN, the GGSN initiates a PDP context activation process once, and sends the data packet For the M2M application terminal; if the GGSN does not have the context information of the M2M application terminal, the GGSN may submit at least one item of the obtained target group ID or the terminal ID of the MM2M application terminal to the subscription database (such as HSS, HLR or group subscription database, etc.) to obtain the core management network element (such as SGSN, MSC, MME, etc.) currently serving the M2M application terminal device, initiate a PDP context activation process on the network side, and send the data packet to the The M2M application terminal corresponding to the terminal identifier. In this way, the data packet can be sent to a single M2M application terminal of the destination group. The GGSN itself can configure the corresponding relationship between the IPv6 address prefix and the group identifier, and the corresponding relationship between the interface identifier of the IPv6 address and the terminal identifier of the M2M application terminal, or can obtain it from HSS, HLR or group subscription database, etc., the present invention Examples are not limited.

Through the above method, both data multicast to a group and data unicast to M2M application terminals under the group can be realized, and at the same time, IP address resources of the network are greatly saved.

As shown in FIG. 4, it is a flow chart of Embodiment 2 of the method for sending data packets by the M2M application server of the present invention, including:

Step 201, the M2M application server acquires the group ID of the target group.

Step 202, the M2M application server acquires the IPv4 address corresponding to the group ID of the target group according to the correspondence between the IPv4 address and the group ID. The M2M application server itself may configure the correspondence between the IPv4 address and the group identifier, or may acquire the correspondence between the two from network-side entities such as HSS, HLR, and group subscription database.

Step 203, the M2M application server sends the data packet to the GGSN serving the target group according to the IPv4 address. Specifically, the M2M application server addresses the GGSN serving the target group according to the IPv4 address, and sends a data packet to the GGSN, which may carry the IPv4 address.

The embodiment shown in Figure 4 may also include:

Step 204, the GGSN obtains the IPv4 address in the data packet, obtains the group identifier of the destination group according to the correspondence between the IPv4 address and the group identifier, and sends the data packet to the destination group. The GGSN can send the data packet to the destination group according to the group identifier of the destination group, and the delivery method can be MBMS or CBC. For example, in the session start procedure (Session Start procedure) under the MBMS mechanism, the GGSN sends the MBMS session start request (MBMS Session StartRequest) message to the SGSN, and the group identifier of the target group can be carried in the MBMS session start request message; The group identifier acquires the service area of the M2M terminal of the target group and the RNC) sends the data packet to the target group according to the MBMS processing mechanism.

Embodiment 2 may also include: the M2M application server obtains the identification information of a certain M2M application terminal in the target group; the data packet sent by the M2M application server to the GGSN serving the target group also carries a certain M2M application terminal identification information. After step 203, it may also include: GGSN obtains the IPv4 address in the data packet and the identification information of the M2M application terminal, obtains the group identification of the target group according to the corresponding relationship between the IPv4 address and the group identification, and sends the data packet to the target group The M2M application terminal corresponding to the identification information of the M2M application terminal in the group.

In the second embodiment, by enhancing or extending the function of the protocol stack between the M2M application server and the GGSN, the data packet issued by the M2M application server can carry the identification information (such as IMSI) of the M2M application terminal.

In step 204, sending the data packet to the M2M application terminal corresponding to the identification information of the M2M application terminal in the destination group may specifically include: if there is context information of the M2M application terminal in the GGSN, it can be acquired as the M2M application terminal according to the context information. The core management network element (such as SGSN, MSC, or MME) of the terminal service, then the GGSN initiates a PDP context activation process, and sends the data packet to the M2M application terminal; if the GGSN does not have the context information of the M2M application terminal, it can Obtain the core management network element ( Such as SGSN, MSC, or MME), initiate a PDP context activation process, and send the data packet to the M2M application terminal corresponding to the identification information of the M2M application terminal.

FIG. 5 is a schematic structural diagram of an embodiment of an M2M application server in the present invention, including a first obtaining module 21, a second obtaining module 22, and a first sending module 23, wherein the first obtaining module 21 is used to obtain the group information of the target group Group identification; the second acquisition module 22 is connected with the first acquisition module 21, and is used to obtain the IPv6 address prefix corresponding to the group identification of the destination group obtained by the first acquisition module 21 according to the correspondence between the IPv6 address prefix and the group identification Or according to the corresponding relationship between the IPv4 address and the group identifier, obtain the IPv4 address corresponding to the group identifier of the target group obtained by the first acquisition module 21; the first sending module 23 is connected with the second acquisition module 22, for according to the Two, the IPv6 address prefix obtained by the acquisition module 22 sends the data packet to the GGSN serving the target group, and the data packet carries the IPv6 address prefix; or is used for obtaining the IPv4 address according to the second acquisition module 22, The data packet is sent to the GGSN serving the destination group, and the data packet carries the IPv4 address.

In one embodiment, the first obtaining module 21 can also be used to obtain the identifier of the M2M application terminal in the target group, and the second obtaining module 22 can also be used to obtain the identifier of each M2M application terminal in the destination group according to the interface identifier of the IPv6 address and the The corresponding relation of the application terminal identification obtains the interface identification of the IPv6 address corresponding to the M2M application terminal; the data packet carrying the IPv6 address prefix sent by the first sending module 23 also carries the interface identification of the IPv6 address.

In another embodiment, the first obtaining module 21 can also be used to obtain the terminal identifier of a certain M2M application terminal in the target group; the data packet carrying the IPv4 address sent by the first sending module 23 also carries the Terminal identifier of a certain M2M application terminal.

Figure 6 is a schematic structural diagram of an embodiment of the GGSN of the present invention, including a first receiving module 31, a third acquiring module 32, and a second sending module 33, wherein the first receiving module 31 is used to receive data packets sent by the M2M application server The third obtaining module 32 is connected with the first receiving module 31, is used to obtain the IPv6 address prefix in the data packet that the first receiving module 31 receives, according to the corresponding relationship between the IPv6 address prefix and the group identifier, obtain the destination group Group ID; or be used to obtain the IPv4 address in the packet received by the first receiving module 31, and obtain the group ID of the destination group according to the correspondence between the IPv4 address and the group ID; the second sending module 33 and The third acquiring module 32 is connected to the first receiving module 31, and sends the data packet received by the first receiving module 31 to the destination group according to the group identifier of the destination group acquired by the third acquiring module 32.

Wherein, the first receiving module 31 can specifically be used to receive a data packet containing an IPv6 address prefix and an interface identifier; or specifically can be used to receive a data packet containing an IPv4 address and the identification information of a certain M2M application terminal;

The third acquiring module 32 can specifically be used to acquire the IPv6 address prefix and the interface identifier of the IPv6 address in the data packet received by the first receiving module 31, according to the correspondence between the IPv6 address prefix and the group identifier, and the IPv6 address Corresponding relationship between the interface identifier and each M2M application terminal identifier in the group, obtain the group identifier of the target group and the terminal identifier of the M2M application terminal corresponding to the interface identifier of the IPv6 address in the destination group; or specifically, It is used to obtain the IPv4 address in the data packet received by the first receiving module 31 and the identification information of a certain M2M application terminal, and obtain the group identification of the target group according to the corresponding relationship between the IPv4 address and the group identification;

The second sending module 33 can specifically be configured to send the first receiving module 31 to The received data packet is sent to the M2M application terminal corresponding to the interface identifier of the IPv6 address; or specifically, it can be used to obtain the group identifier of the destination group and the identification information of a certain M2M application terminal according to the third acquisition module 32, and convert the The data packet received by the first receiving module 31 is sent to the M2M application terminal corresponding to the identification information of a certain M2M application terminal in the destination group.

An embodiment of the present invention also provides a system for sending data packets by an M2M application server, which may include the M2M application server and the GGSN in the foregoing embodiments, wherein the first sending module is connected to the first receiving module.

In each embodiment provided by the present invention, an IPv6 address prefix or IPv4 address is assigned to a group in an M2M application, and the group identifier of the destination group is obtained through the IPv6 address prefix or IPv4 address, and the data packet is sent to the group The GGSN of the service is identified, and the GGSN sends the data packet to the destination group, so that the data packet can be delivered to the M2M application terminals in the group, saving IP address resources.

Moreover, the interface identifier of the IPv6 address prefix or the identifier information of the M2M application terminal can also be carried in the data packet, so that the GGSN can send the data packet to a single M2M application terminal in the destination group, and save IP address resources.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it still Modifications or equivalent replacements can be made to the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims (20)

1. A method for sending a data packet by an M2M application server, comprising: The M2M application server obtains the group identifier of the target group; The M2M application server acquires the IPv6 address prefix corresponding to the group identifier of the target group according to the correspondence between the IPv6 address prefix and the group identifier; The M2M application server sends a data packet to the GGSN serving the destination group according to the IPv6 address prefix, and the data packet carries the IPv6 address prefix. 2. The method according to claim 1, further comprising: The GGSN obtains the IPv6 address prefix in the data packet, obtains the group identifier of the destination group according to the correspondence between the IPv6 address prefix and the group identifier, and sends the data packet to the destination group. 3. The method according to claim 2, wherein sending the data packet to the target group specifically comprises: the GGSN sends an MBMS session start request message to the SGSN, and the MBMS session start request message carries the The group ID of the target group; the SGSN acquires the service area and the wireless network subsystem of the M2M application terminals of the target group according to the group ID; and sends the data packet to the target group. 4. The method according to claim 1, further comprising: the M2M application server obtains the identification of the M2M application terminal in the target group, and according to the interface identification of the IPv6 address and the identification of each M2M application terminal in the target group, corresponding relationship, and obtain the interface identifier of the IPv6 address corresponding to the M2M application terminal; The data packet sent by the M2M application server to the GGSN serving the target group also carries the interface identifier of the IPv6 address. 5. The method according to claim 4, further comprising: The GGSN obtains the IPv6 address prefix and the interface identifier of the IPv6 address in the data packet, and according to the corresponding relationship between the IPv6 address prefix and the group identifier, and the relationship between the interface identifier of the IPv6 address and the identifier of each M2M application terminal in the group Correspondence, obtain the group identifier of the destination group and the terminal identifier of the M2M application terminal corresponding to the interface identifier of the IPv6 address in the destination group, and send the data packet to the destination group The M2M application terminal corresponding to the interface identifier of the IPv6 address. 6. The method according to claim 5, wherein sending the data packet to the M2M application terminal corresponding to the interface identifier of the IPv6 address in the destination group specifically comprises: obtaining the information related to the IPv6 address according to the context information. The core management network element of the M2M application terminal service corresponding to the interface identifier of the IPv6 address, the GGSN initiates a PDP context activation process, and sends the data packet to the M2M application terminal corresponding to the interface identifier of the IPv6 address . 7. The method according to claim 5, wherein sending the data packet to the M2M application terminal corresponding to the interface identifier of the IPv6 address in the destination group specifically comprises: The GGSN obtains, according to the group identifier of the destination group or the terminal identifier of the M2M application terminal corresponding to the interface identifier of the IPv6 address, from the subscription database or the M2M application server, the IP address corresponding to the interface identifier of the IPv6 address. The core management network element serving the M2M application terminal initiates a PDP context activation procedure, and sends the data packet to the M2M application terminal corresponding to the interface identifier of the IPv6 address. 8. A method for sending a data packet by an M2M application server, comprising: The M2M application server obtains the group identifier of the target group; The M2M application server obtains the IPv4 address corresponding to the group identifier of the target group according to the correspondence between the IPv4 address and the group identifier; The M2M application server sends a data packet to the GGSN serving the destination group according to the IPv4 address, and the data packet carries the IPv4 address. 9. The method according to claim 8, further comprising: The GGSN obtains the IPv4 address in the data packet, obtains the group identifier of the destination group according to the correspondence between the IPv4 address and the group identifier, and sends the data packet to the destination group. 10. The method according to claim 9, wherein sending the data packet to the target group specifically comprises: the GGSN sends an MBMS session start request message to the SGSN, and the MBMS session start request message carries the The group ID of the target group; the SGSN acquires the service area and the wireless network subsystem of the M2M application terminals of the target group according to the group ID; and sends the data packet to the target group. 11. The method according to claim 8, further comprising: the M2M application server obtaining the identification information of a certain M2M application terminal in the target group; The data packet of the GGSN of the group service also carries the identification information of the certain M2M application terminal. the 12. The method according to claim 11, further comprising: The GGSN acquires the IPv4 address in the data packet and the identification information of a certain M2M application terminal, obtains the group identity of the target group according to the correspondence between the IPv4 address and the group identity, and sends the data packet to To the M2M application terminal corresponding to the identification information of the certain M2M application terminal in the target group. the 13. The method according to claim 12, wherein sending the data packet to the M2M application terminal corresponding to the identification information of the certain M2M application terminal in the destination group specifically comprises: Obtaining the core management network element of the M2M application terminal service corresponding to the identification information of the M2M application terminal according to the context information; the GGSN initiates a PDP context activation procedure, and sends the data packet to the M2M application terminal. the 14. The method according to claim 12, wherein sending the data packet to the M2M application terminal corresponding to the identification information of the certain M2M application terminal in the destination group specifically comprises: The GGSN obtains the core management network element serving the certain M2M application terminal from the subscription database or the M2M application server according to the group identifier of the target group or the identification information of a certain M2M application terminal, and initiates a PDP context once The activation process is to send the data packet to the certain M2M application terminal. the 15. An M2M application server, comprising: The first obtaining module is used to obtain the group identifier of the target group; The second obtaining module is connected with the first obtaining module, and is used to obtain the IPv6 address prefix corresponding to the group identification of the target group obtained by the first obtaining module according to the corresponding relationship between the IPv6 address prefix and the group identification; Or according to the corresponding relationship between the IPv4 address and the group identifier, obtain the IPv4 address corresponding to the group identifier of the target group obtained by the first obtaining module; The first sending module is connected with the second obtaining module, and is used to send the data packet to the GGSN serving the target group according to the IPv6 address prefix obtained by the second obtaining module, the data packet carrying an IPv6 address prefix; or for sending a data packet to the GGSN serving the target group according to the IPv4 address obtained by the second obtaining module, the data packet carrying an IPv4 address. 16. The M2M application server according to claim 15, wherein the first acquiring module is further configured to acquire the identifier of the M2M application terminal in the target group; The second obtaining module is further configured to obtain the interface identifier of the IPv6 address corresponding to the M2M application terminal according to the corresponding relationship between the interface identifier of the IPv6 address and the identifier of each M2M application terminal in the destination group; The data packet carrying the IPv6 address prefix sent by the first sending module also carries the interface identifier of the IPv6 address. 17. The M2M application server according to claim 15, characterized in that, The first acquiring module is further configured to acquire a terminal identifier of a certain M2M application terminal in the target group; The data packet carrying the IPv4 address sent by the first sending module also carries the terminal identifier of the certain M2M application terminal. 18. A GGSN, characterized in that it comprises: The first receiving module is configured to receive the data packet sent by the M2M application server; The third obtaining module, connected with the first receiving module, is used to obtain the IPv6 address prefix in the data packet received by the first receiving module, and obtain the destination group according to the correspondence between the IPv6 address prefix and the group identifier or for obtaining the IPv4 address in the data packet received by the first receiving module, and obtaining the group identifier of the destination group according to the correspondence between the IPv4 address and the group identifier; The second sending module is respectively connected to the third obtaining module and the first receiving module, and receives the first receiving module according to the group identifier of the target group obtained by the third obtaining module The data packets are sent to the destination group. 19. The GGSN according to claim 18, wherein the first receiving module is specifically configured to receive a data packet containing an interface identifier of an IPv6 address prefix and an IPv6 address; or specifically used to receive a packet containing an IPv4 address and an IPv6 address A data packet of identification information of a certain M2M application terminal; The third obtaining module is specifically used to obtain the IPv6 address prefix and the interface identifier of the IPv6 address in the data packet received by the first receiving module, according to the corresponding relationship between the IPv6 address prefix and the group identifier, and the interface of the IPv6 address The corresponding relationship between the identification and each M2M application terminal identification in the group, obtaining the group identification of the target group and the terminal identification of the M2M application terminal corresponding to the interface identification of the IPv6 address in the target group; Or it is specifically used to obtain the IPv4 address in the data packet received by the first receiving module and the identification information of a certain M2M application terminal, and obtain the group of the target group according to the corresponding relationship between the IPv4 address and the group identification logo; The second sending module is specifically configured to obtain the group identifier of the destination group and the terminal identifier of the M2M application terminal corresponding to the interface identifier of the IPv6 address in the destination group obtained by the third obtaining module , sending the data packet to the M2M application terminal corresponding to the interface identifier of the IPv6 address; or specifically used to obtain the group identifier of the destination group and a certain M2M application terminal according to the third obtaining module and send the data packet to the M2M application terminal corresponding to the identification information of the certain M2M application terminal in the destination group. 20. A system for sending data packets by an M2M application server, comprising the M2M application server according to any one of claims 15-17 and the GGSN according to claim 18 or 19, the The first sending module is connected to the first receiving module. the

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