CN102025601B - Data encapsulation method and system - Google Patents

Abstract

A data encapsulation method and system. When a routing node receives a message sent from a source terminal to a destination terminal, an encapsulation layer is added to the message, and the sequence information of the message sent by the terminal is encapsulated in the encapsulation layer; When the routing node receives the message, it performs decapsulation processing, sorts the received message according to the sequence information, and sends it to the destination terminal. The serial number information is carried in the encapsulation header, and the receiving ASN side can judge whether there is out-of-order or packet loss on the transmission path according to the serial number information; if out-of-order occurs, the receiving ASN side can increment the serial number Features are processed out of order to improve transmission quality; in addition, the message type can also be carried in the encapsulation header to distinguish signaling and data, and facilitate the exchange of non-data messages between ASNs.

Description

A data encapsulation method and system

technical field

The invention relates to the communication field, in particular to a data encapsulation method and system.

Background technique

The IP address in TCP/IP (Transmission Control Protocol/Internet Protocol), which is widely used in the Internet, has dual functions. As the identity of the network interface of the transport layer host. At the beginning of the TCP/IP protocol design, the movement of the host was not considered. However, when the host mobile becomes more and more common, the semantic overload defect of this IP address becomes more and more obvious. When the IP address of the host changes, not only the route will change, but also the identity of the communication terminal host will change, which will lead to a heavier and heavier routing load, and the change of the host identity will also cause the interruption of applications and connections.

The purpose of the separation of identity and location is to solve the semantic overload of IP addresses, serious routing load, and security issues, and to separate the dual functions of IP addresses to achieve mobility, multi-homing, dynamic reallocation of IP addresses, Support for alleviating routing load and mutual access between different network areas in the next generation Internet.

The following problems exist in the existing identification and location separation solutions: the data packets sent to the terminal arrive at the terminal through different IP routes (such as core switching routers or other routers), and the delay of each route is different. Yes, the data packets received by the terminal may be out of order, especially when the user is moving. However, there is no mechanism for sorting out-of-order data in the prior art.

Contents of the invention

The technical problem to be solved by the present invention is to provide a data encapsulation method and system, which can solve the problem of out-of-sequence and packet loss in the process of message transmission or user movement under the framework of separation of identity and location.

In order to solve the above problems, the present invention provides a data encapsulation method, comprising:

When the routing node receives a message sent by the source terminal to the destination terminal, it adds an encapsulation layer to the message, and encapsulates the sequence information and the source routing location of the message sent by the terminal in the encapsulation layer Identification RID, and target RID, and source user identification AID, and target AID;

When the routing node where the destination terminal is located receives the message, it performs decapsulation processing, sorts the received message according to the sequence information, and sends it to the destination terminal.

Further, the encapsulation layer includes an identification bit field for identifying whether the message carries sequence information.

Further, the routing node where the source terminal is located encapsulates the data of the message in a user datagram protocol (UDP) manner.

Further, the encapsulation layer also includes one or any combination of the following fields:

The message type field is used to identify whether the message is a data packet or a signaling packet, and if it is a signaling packet, it is also used to identify the type of signaling; the version number field is used to identify the version number of the data encapsulation format ; Reserved field.

Another technical problem to be solved by the present invention is to provide a data encapsulation method, which is applied to the identity identification and location separation architecture, including:

When the source access support node (ASN) or the interworking gateway node (ISN) receives the message sent by the source terminal to the destination terminal located in the architecture, an encapsulation layer is added to the message, and the encapsulation layer includes The terminal sends the sequence information of the message, and the source routing location identifier RID, and the target RID, and the source user identifier AID, and the target AID;

When the destination ASN where the destination terminal is located receives the message, it decapsulates the message, sorts the received message according to the sequence information, and sends it to the destination terminal.

Further, the source ASN or ISN queries the corresponding routing location identifier (RID) according to the received destination AID in the data message, encapsulates the queried destination RID in the data message, and forwards it to backbone network;

The backbone network forwards the data packet to the destination ASN according to the destination RID.

Further, when the source ASN or ISN inquires about the corresponding RID, it first inquires whether the identity and location identification mapping information of the destination AID is stored locally, and if it is not stored, queries the mapping plane for the AID and RID mapping information,

Further, the message includes a data packet or a signaling packet, and the data packet and the signaling packet of the encapsulation module adopt a unified format.

Further, the encapsulation layer contains one or any combination of the following fields:

An identification bit field, used to identify whether the message contains sequence information;

The message type field is used to identify whether the message is a data packet or a signaling packet, and if it is a signaling packet, it is also used to identify the type of signaling; the version number field is used to identify the version number of the data encapsulation format ; Reserved field.

Further, the message adopts a standard IP packet; the source ASN uses UDP to encapsulate the data of the message.

The present invention also provides a data encapsulation system, including: a routing node and a terminal, and the routing node further includes an encapsulation module, a decapsulation module and a forwarding module, wherein,

The encapsulation module is configured to, when receiving a message sent by a source terminal, add an encapsulation layer to the message, and encapsulate sequence information of the message sent by the terminal in the encapsulation layer, and After the source routing location identifier RID, and the target RID, and the source user identifier AID, and the target AID, send it to the forwarding module;

The decapsulation module is configured to, when receiving the message sent to the destination terminal, perform decapsulation processing and send it to the forwarding module;

The forwarding module is configured to, when receiving the data message sent by the encapsulation module, forward it to the decapsulation module of the destination routing node; and, when receiving the data message sent by the decapsulation module, according to the After sorting the received packets according to the sequence information, the packets are sent to the destination terminal.

Further, the encapsulation module is further configured to encapsulate an identification bit field in the encapsulation layer for identifying whether the message carries sequence information.

Further, the encapsulation module performs data encapsulation on the message in a UDP manner.

Further, the encapsulation module is also used for encapsulating one or any combination of the following fields in the encapsulation layer:

The message type field is used to identify whether the message is a data packet or a signaling packet, and if it is a signaling packet, it is also used to identify the type of signaling; the version number field is used to identify the version number of the data encapsulation format ; Reserved field.

The present invention also provides a data encapsulation system, which is applied to the identity identification and location separation architecture, including ASN, ISN and terminal, wherein the ASN further includes an encapsulation module, a decapsulation module and a forwarding module, wherein:

The encapsulation module is configured to add an encapsulation layer to the message when receiving a message sent by the source terminal to the destination terminal located in the architecture, and the encapsulation layer includes the terminal sending the message sequence information, and the source routing location identifier RID, and the target RID, and the source user identifier AID, and the target AID;

The decapsulation module is configured to, when receiving the message sent to the destination terminal, perform decapsulation processing and send it to the forwarding module;

The forwarding module is configured to, when receiving the data message sent by the encapsulation module, forward it to the decapsulation module of the destination ASN; and, when receiving the data message sent by the decapsulation module, according to the The sequence information sorts the received packets and sends them to the destination terminal.

Further, the encapsulation module is used to query the corresponding RID according to the purpose AID in the received data message, and encapsulate the queried purpose RID in the data message, and forward it to the backbone network;

The backbone network forwards the data packet to the destination ASN according to the destination RID.

Further, the encapsulation module is configured to, when inquiring about the corresponding RID, first inquire whether the identity location identification mapping information of the target AID is saved locally, and inquire about the AID in the mapping plane if it is not saved. Mapping information with RID,

Further, the encapsulation module is used for encapsulating the data packets or signaling packets in a uniform format.

Further, the encapsulation module is also used for encapsulating one or any combination of the following fields in the encapsulation layer:

An identification bit field, used to identify whether the message contains sequence information;

The message type field is used to identify whether the message is a data packet or a signaling packet, and if it is a signaling packet, it is also used to identify the type of signaling;

A version number field, used to identify the version number of the data encapsulation format;

Reserved field.

Further, the encapsulation module performs data encapsulation on the message in a UDP manner.

Adopting the above-mentioned data encapsulation format has at least the following beneficial effects:

1. The serial number information is included in the encapsulation header, and the receiving ASN can judge whether there is out-of-order or packet loss on the transmission path according to the serial number information; if out-of-order occurs, the receiving ASN can increment according to the serial number out-of-order processing to improve the transmission quality;

2. There is a message type in the encapsulation header, which can distinguish signaling and data, and facilitate the exchange of non-data messages between ASNs;

3. There is a version number in the encapsulation header. When the protocol is upgraded in the future, the version number can be used to ensure that ASNs of different protocol versions communicate with each other;

4. There is a flag field S in the encapsulation header. Only when this S is 1, it means that the serial number in the header is meaningful. If the transmission quality is good, the serial number can be omitted. At this time, the S bit is 0;

5. There are reserved fields in the encapsulation header, which is convenient for future expansion of the protocol. This field can be used to identify different data content in the encapsulated data;

6. The encapsulated data packets can be routed on the IP backbone network, and the routers on the existing backbone network do not need to be modified in any way.

Description of drawings

Fig. 1 is a schematic network topology diagram of the architecture of the identity and location separation network in the embodiment of the present invention;

Fig. 2 is a schematic block diagram of a data encapsulation system according to an embodiment of the present invention.

Detailed ways

The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

In order to overcome the deficiencies of the existing technologies, this embodiment proposes a network-based identity and location separation architecture, the core idea of which is: divide the network into an access network and a backbone network, and assign a unique There are two types of identification in the network: Access Identifier (AID for short) and Routing-Location Identifier (RID for short). Among them, AID is a unique identity assigned to each user in the network. It can only be used at the access layer and remains unchanged during the movement of the user terminal. The AID is used between user terminals to identify the opposite end. The AID of the opposite end needs to be used for communication; RID is a routing location identifier allocated for user terminals and can only be used in the backbone network.

The specific network topology of the identity-based and location-separated architecture of this embodiment is shown in Figure 1, where the logical functions of each network element are as follows:

1. Access Support Node (ASN for short)

The access support node is responsible for providing access services for various mobile terminals, assigning AID and RID to the accessing users, and marking and encapsulating the data packets sent by the terminals before transmitting them in the core network.

2. Mapping plane

The mapping plane is mainly responsible for maintaining the mapping relationship between the user identity and the routing location in the identity and location separation network (that is, the RID-AID mapping relationship), and providing query services to the ASN and other mapping servers. The mapping plane is composed of multiple Identity Location Registers (ILR for short). During the process of ASN querying the location of the communication peer, if the ASN does not have the routing location information of the communication peer locally, it will be searched through the mapping plane.

3. Certification center

The authentication center is responsible for recording information such as user categories and user service levels, and performs legal authentication and authorization for users when they access. The authentication center supports two-way authentication between the network and users.

4. IP backbone network

The IP backbone network is an interconnected network between ASNs. Its main function is to select routes and forward data packets according to the routing location identifiers in the data packets, and to forward the data sent by the ASN to the correct destination; the IP network is composed of core switching routers. (Central Switch Router, CSR for short). It is the same as the existing IP network without any modification.

5. Interconnect Service Node (ISN for short)

The ISN is the interworking node between the identity and location separation network and other networks, such as the Internet. Two types of different networks must communicate with each other through the ISN. The ISN encapsulates, routes, and forwards data packets between the architecture network and the traditional IP network.

6. Wireless network

The wireless network is responsible for providing and maintaining the two-layer link (physical layer and link layer) between the user terminal and the ASN. In the cellular mobile network, it is responsible for functions such as wireless resource allocation and management. The wireless network here can be WCDMA (Wideband CDMA, wideband code division multiple access), TD-SCDMA (TimeDivision-Synchronous Code Division Multiple Access, time division synchronous code division multiple access), CDMA2000, LTE (Long Term Evolution, long-term evolution) Waiting for wifi.

On the ASN, information of all Correspondent Nodes (CN) is saved for each locally accessed mobile terminal (Mobile Node, referred to as MN). When the location of the mobile terminal changes, the new ASN will At this time, the identification of the terminal location is notified to the ASN where the communication peer is located. When there are multiple communication peers, each CN needs to be notified to ensure that each CN sends the data packet to the correct ASN.

This embodiment provides a data encapsulation format between ASNs and between ASNs and ISNs based on the above identity and location separation architecture. The encapsulated data can identify the timing of the terminal sending the message, and the terminal receiving the data can Sort the data by ID.

The data encapsulation method in this embodiment is not limited to be applied to the above-mentioned architecture, and may also be applicable to various other architectures or communication networks.

For example, in other embodiments of the present invention, when the routing node receives a message sent from the source terminal to the destination terminal, an encapsulation layer is added to the message, and the sequence information of the message sent by the terminal is encapsulated in the encapsulation layer; the destination terminal When the routing node where it is located receives the message, it performs decapsulation processing, sorts the received message according to the sequence information, and sends it to the destination terminal.

In addition, the encapsulation layer also contains one or any combination of the following fields:

An identification bit field, used to identify whether the message contains sequence information;

The message type field is used to identify whether the message is a data packet or a signaling packet, and if it is a signaling packet, it is also used to identify the type of signaling;

A version number field, used to identify the version number of the data encapsulation format;

Reserved field.

In this embodiment, when the ASN and the ISN receive the message sent by the terminal, the specific processing is as follows:

Use UDP (User Datagram Protocol, User Datagram Protocol) to encapsulate the data of the message, add an encapsulation layer to the message sent by the terminal, and carry the timing information of the message sent by the terminal in the encapsulation header, for example, for each A sending terminal includes an increasing serial number in the sent message, so that the receiving end can judge the out-of-sequence and packet loss of the message according to the serial number.

The specific implementation can adopt the following packaging format:

IP header source RID Target RID UDP header encapsulation layer Source AID Target AID Data Packet/Signaling Packet

In order to make full use of the existing backbone network, in this embodiment, standard IP packets are used for data packets between ASNs and between ASNs and ISNs, so as to ensure that the encapsulated data packets can be normally routed on the IP backbone network.

The specific implementation manner of the data encapsulation of the present invention will be further described in detail below in conjunction with two application examples.

Application example one

When the terminals in the network based on identity identification and location separation are communicating, the forwarding process of data packets between ASNs is as follows:

Step 101: The source ASN receives the data packet sent by the terminal:

The data packet format is a standard IPV4 data packet format, and the source address and destination address are respectively the source AID and the destination AID (that is, the AID of the communication peer);

Step 102: data encapsulation by the source ASN;

After the source ASN receives the data packet, it queries the AID-RID mapping table in the local cache according to the destination AID in it: if no corresponding AID-RID mapping entry is found, it obtains the RID of the communication peer by querying the mapping plane, and converts it to It is encapsulated in the header of the message as the target RID; and an encapsulation layer is added, and the encapsulation layer at least includes the serial number sent by the data packet. The purpose of encapsulating the RID is for routing and forwarding;

In this embodiment, the format of the packet after source ASN encapsulation is as follows (each row has 4 bytes in this table):

Among them, the meaning of each field is explained as follows:

Standard IP header: that is, the IP header of the traditional IP network;

Source RID: refers to the RID of the source ASN;

Target RID: refers to the RID of the target ASN;

Source port, destination port, UDP length, UDP checksum: the traditional UDP header;

Source AID: refers to the source user ID of the data packet;

Target AID: refers to the target user ID of the received data packet;

Message type: used to indicate whether the encapsulated message is data or signaling, and if it is signaling, different signaling can be distinguished;

Version number (optional): 4 bits, which refers to the version number of the data encapsulation format, which is convenient for future expansion;

Res (optional): occupies 3 bits and is used as a reserved field for future expansion;

S (optional): Occupies 1 bit, indicating whether the data message has a serial number. If S is 1, it indicates that the subsequent serial number field is valid. If S is 0, it indicates that the subsequent serial number field is invalid. of.

Sequence number: Refers to the incremental sequence number carried in the sent data packet by the ASN of the data sender for each same AID. The sequence number and packet loss can be judged at the receiver according to this sequence number. The serial number occupies 2 bytes.

After the source ASN is encapsulated, the source address and destination address of the data packet are the RIDs of the source ASN and the destination ASN. The user data format and content in step 1 remain unchanged, and the encapsulated data is sent to the generalized forwarding plane. The routing identifier RID of the ASN forwards it to the destination ASN;

Step 103: The destination ASN receives the data packet and decapsulates it, removes the entire encapsulation header, restores the data format before encapsulation, and sends the data to the user identified by the target AID; meanwhile, the ASN that receives the data packet can Sequence the received packets using the sequence numbers in the encapsulation header. For example, when the terminal moves, some data will be forwarded from the original ASN to the new ASN when the handover is just completed. In this case, the new ASN needs to sort the data according to the sequence number.

Application example two

When a terminal in a traditional IP network accesses a terminal in the network based on the separation of identity and location in the present invention, the forwarding process of the data message is as follows:

Step 201: the ISN receives the data packet sent by the terminal, and the data packet format is a standard IPV4 data packet;

In step 202, the ISN encapsulates the data packet, and its encapsulation format is the same as in step 102;

The ISN queries the AID-RID mapping table in the local cache according to the destination address in the data message, that is, the AID of the communication peer: if the corresponding AID-RID mapping entry is found, encapsulate the RID of the CN as the destination address in the message header, forward to the generalized forwarding plane; if no corresponding AID-RID mapping entry is found, the data packet is tunneled and encapsulated and forwarded to the mapping forwarding plane, and the corresponding AID-RID mapping entry is found by the mapping forwarding plane, and the RID of CN It is encapsulated in the packet header as the destination address and forwarded to the generalized forwarding plane.

Moreover, when the ISN cannot find the corresponding AID-RID mapping entry, it will send a process of querying the AID-RID mapping relationship to the mapping forwarding plane, and save it in the local cache after receiving the AID-RID mapping relationship returned by the mapping forwarding plane .

Step 203, the generalized forwarding plane sends the data message to the destination ASN, and the destination ASN decapsulates the received data message, strips off the RID encapsulation of the data message header, and decapsulates the source of the decapsulated data message The destination address of the address is translated into the IP address format supported by the traditional Internet network.

The above example uses the data packet as an example to illustrate the data encapsulation process of the present invention, and the implementation steps are also applicable to the signaling packet.

In addition, in order to simplify the processing in the example of the present invention, the data packets and signaling packets between ASN and ASN, and between ASN and ISN all adopt a unified format. In the case of the same format, when an ASN or ISN processes a data packet or a signaling packet, it can be judged that it is data or signaling only according to the fixed position of the message header, so that the processing speed of the system can be improved.

In the present invention, ASN or ISN only carries out the encapsulation of serial number when receiving the data/signaling message that terminal sends out; When receiving the message that sends to terminal, ASN or ISN sort according to serial number words), and then send it to the destination terminal after being decapsulated.

As shown in Fig. 2, the present invention also provides a data encapsulation system, which is applied to the identity identification and location separation architecture, including ASN, ISN and terminal, wherein ASN and ISN further include encapsulation module, decapsulation module and forwarding module. Among them, the functions of each network element/module are as follows:

The encapsulation module is used to add an encapsulation layer to the message when receiving the message sent by the source terminal to the destination terminal located in this architecture, and the encapsulation layer contains the sequence information of the message sent by the terminal;

The decapsulation module is used to, when receiving a message sent to the destination terminal, perform decapsulation processing and send it to the forwarding module;

The forwarding module is used for forwarding to the decapsulation module of the destination ASN when receiving the data message sent by the encapsulation module; and, when receiving the data message sent by the decapsulation module, according to the sequence information received After the packets are sorted, they are sent to the destination terminal.

Wherein, the encapsulation module is also used for querying the corresponding RID according to the purpose AID in the received data message, and encapsulating the queried purpose RID in the data message and forwarding to the backbone network;

The backbone network forwards the data packet to the destination ASN according to the destination RID.

Further, the encapsulation module is also used to, when inquiring about the corresponding RID, first inquire whether the identity location identification mapping information of the target AID is stored locally, and if not, query the mapping plane for the mapping information between the AID and the RID,

Further, the encapsulation module is used for encapsulating messages including data packets or signaling packets in a uniform format.

Further, the encapsulation module is also used to encapsulate one or any combination of the following fields in the encapsulation layer:

The identification field is used to identify whether the message has sequence information;

The message type field is used to identify whether the message is a data packet or a signaling packet, and if it is a signaling packet, it is also used to identify the type of signaling;

The version number field is used to identify the version number of the data encapsulation format;

Reserved field.

Further, the encapsulation module uses UDP to encapsulate the data of the message.

Claims (20)

1. a data encapsulation method, is characterized in that, comprising:

When routing node receives source terminal and mails to the message of object terminal, in described message, increase by an encapsulated layer, and in described encapsulated layer, encapsulate sequence information and source routing station location marker RID and target RID and source user sign AID and target AID that described terminal sends described message;

When the routing node at described object terminal place receives described message, carry out decapsulation processing, and after the message receiving being sorted according to described sequence information, send to described object terminal.

2. the method for claim 1, is characterized in that,

In described encapsulated layer, comprise a flag field, for whether identifying described message with sequence information.

3. the method for claim 1, is characterized in that,

The routing node at described source terminal place adopts the mode of User Datagram Protoco (UDP) UDP to carry out data encapsulation to described message.

4. the method as described in claim 1,2 or 3, is characterized in that,

In described encapsulated layer, also comprise a kind of or its combination in any in following field:

Message type field, is packet or signaling bag for identifying described message, if signaling bag, also for identifying the type of signaling; Version number field, for identifying the version number of described data encapsulation form; Reserved field.

5. a data encapsulation method, is applied to identify label and position separation, it is characterized in that, comprising:

When source access support node ASN or Interworking gateway node ISN receive source terminal and mail to the message of the object terminal that is positioned at described framework, in described message, increase by an encapsulated layer, in described encapsulated layer, comprise sequence information and source routing station location marker RID and target RID and source user sign AID and target AID that described terminal sends described message;

When the object ASN at described object terminal place receives described message, carry out decapsulation processing, and after the message receiving being sorted according to described sequence information, send to described object terminal.

6. method as claimed in claim 5, is characterized in that,

Described source ASN or ISN inquire about corresponding route station location marker RID according to the object AID in the described data message receiving, and the object RID inquiring is encapsulated in described data message, are forwarded to backbone network;

Described backbone network according to described object RID by described data message forwarding to described object ASN.

7. method as claimed in claim 6, is characterized in that,

Described source ASN or ISN are when the RID of the described correspondence of inquiry, and first the local identity station location marker map information of whether preserving described object AID of inquiry, in the situation that not preserving, inquires about the map information of described AID and RID to mapping plane.

8. method as claimed in claim 5, is characterized in that,

Described message comprises packet or signaling bag, and described package module packet and signaling bag adopt unified form.

9. method as claimed in claim 5, is characterized in that,

In described encapsulated layer, comprise a kind of or its combination in any in following field:

Whether flag field, for identifying described message with sequence information;

Message type field, is packet or signaling bag for identifying described message, if signaling bag, also for identifying the type of signaling;

Version number field, for identifying the version number of described data encapsulation form;

Reserved field.

10. if claim 5 to 9 is to the method as described in any one, it is characterized in that,

Described message adopts the IP bag of standard; Described source ASN adopts the mode of UDP to carry out data encapsulation to described message.

11. 1 kinds of data encapsulation systems, is characterized in that, comprising: routing node and terminal, and described routing node further comprises package module, decapsulation module and forwarding module, wherein,

Described package module is used for, when receiving the message that source terminal sends, in described message, increase by an encapsulated layer, and in described encapsulated layer, encapsulate described terminal and send after the sequence information of described message and source routing station location marker RID and target RID and source user sign AID and target AID, send to described forwarding module;

Described decapsulation module is used for, and while receiving the described message that mails to object terminal, carries out, after decapsulation processing, sending to described forwarding module;

Described forwarding module is used for, and when receiving the data message of described package module transmission, is transmitted to the decapsulation module of object routing node; And, when receiving the data message of described decapsulation module transmission, after the message receiving being sorted according to described sequence information, send to described object terminal.

12. systems as claimed in claim 11, is characterized in that,

Described package module also for, in described encapsulated layer, encapsulate a flag field, for whether identifying described message with sequence information.

13. systems as claimed in claim 11, is characterized in that,

Described package module adopts the mode of UDP to carry out data encapsulation to described message.

14. systems as described in claim 11,12 or 13, is characterized in that,

Package module also for, in described encapsulated layer, encapsulate a kind of or its combination in any in following field:

Message type field, is packet or signaling bag for identifying described message, if signaling bag, also for identifying the type of signaling; Version number field, for identifying the version number of described data encapsulation form; Reserved field.

15. 1 kinds of data encapsulation systems, are applied to identify label and position separation, it is characterized in that, comprise ASN, ISN and terminal, and wherein said ASN further comprises package module, decapsulation module and forwarding module, wherein:

Described package module is used for, when receiving source terminal and mailing to the message of the object terminal that is positioned at described framework, in described message, increase by an encapsulated layer, in described encapsulated layer, comprise sequence information and source routing station location marker RID and target RID and source user sign AID and target AID that described terminal sends described message;

Described decapsulation module is used for, and while receiving the described message that mails to object terminal, carries out, after decapsulation processing, sending to described forwarding module;

Described forwarding module is used for, and when receiving the data message of described package module transmission, is transmitted to the decapsulation module of object ASN; And, when receiving the data message of described decapsulation module transmission, after the message receiving being sorted according to described sequence information, send to described object terminal.

16. systems as claimed in claim 15, is characterized in that,

Described package module is used for, and inquires about corresponding RID, and the object RID inquiring is encapsulated in described data message according to the object AID in the described data message receiving, and is forwarded to backbone network;

Described backbone network according to described object RID by described data message forwarding to described object ASN.

17. systems as claimed in claim 16, is characterized in that,

Described package module is used for, and when the RID of the described correspondence of inquiry, first the local identity station location marker map information of whether preserving described object AID of inquiry, in the situation that not preserving, inquires about the map information of described AID and RID to mapping plane.

18. systems as claimed in claim 15, is characterized in that,

Described package module is used for, and to the message of packet or signaling bag type, adopts unified form to encapsulate.

19. systems as claimed in claim 15, is characterized in that,

Described package module also for, in described encapsulated layer, encapsulate a kind of or its combination in any in following field:

Whether flag field, for identifying described message with sequence information;

Message type field, is packet or signaling bag for identifying described message, if signaling bag, also for identifying the type of signaling;

Version number field, for identifying the version number of described data encapsulation form;

Reserved field.

20. if claim 15 to 19 is to the system as described in any one, it is characterized in that,

Described package module adopts the mode of UDP to carry out data encapsulation to described message.