CN102932467B - The transmission method of packet and device - Google Patents

Abstract

The present invention relates to a kind of transmission method and device of packet.The transmission method of packet comprises: the first mobile terminal arranges initial data packets, first home address of the first source address corresponding to the first mobile terminal, second home address of first object address corresponding to the second mobile terminal; Carry out tunnel encapsulation to initial data packets obtain the first encapsulated data packet and send, first packaged source address is the first network address of the first mobile terminal, first encapsulation destination address is the second home address, so that the second home address is mapped as the second network address of the second mobile terminal by gateway.The transmission method of the packet of the present embodiment and device, first mobile terminal and the second mobile terminal can utilize home address namely can send packet to opposite end mobile terminal, gateway is utilized to carry out IP mapping, do not need application server or miscellaneous equipment to communicate first switching network address between mobile terminals, processing method is simple again.

Description

Data packet transmission method and device

technical field

The invention relates to the field of mobile communication, in particular to a data packet transmission method and device.

Background technique

Most of the Internet Protocol (IP) addresses allocated to the user equipment (UE) by the existing mobile communication packet domain network are dynamically allocated. The IP address assigned to the UE by the network is likely to change. This situation brings great inconvenience to the inter-access business of packet domain terminals, because every time the IP address assigned to the UE changes, it is necessary to re-exchange the IP address information and perform data based on the new IP address. business processing.

A prior art is that mobile phone QQ, MSN, Skype and other data services transfer the IP address information through the application server to avoid the inconvenience caused by the change of the IP address information. However, in this way, the IP address information is transferred at the application layer by deploying the application server. When the IP address changes, data service processing is still very inconvenient.

Contents of the invention

The embodiment of the present invention aims at the defects of the prior art, and provides a data packet transmission method and device, which uses the newly added identification network address to uniquely identify the mobile terminal, and avoids the need to know the network address of the opposite end when the network address changes. The address can only send data packets.

In a first aspect, an embodiment of the present invention provides a data packet transmission method, the method comprising:

The first mobile terminal sets an initial data packet to be sent to the second mobile terminal, the first source address in the initial data packet is the first identification address corresponding to the first mobile terminal, and the first target address is the A second identification address corresponding to the second mobile terminal;

Perform tunnel encapsulation on the initial data packet to obtain a first encapsulated data packet and send it, the first encapsulation source address in the first encapsulation data packet is the first network address of the first mobile terminal, and the first encapsulation target address an address for the second identification, so that the gateway maps the second identification address to the second network address of the second mobile terminal.

In a second aspect, the embodiment of the present invention also provides a data packet transmission method, the method comprising:

The gateway receives the first encapsulated data packet sent by the first mobile terminal, the first encapsulated source address in the first encapsulated data packet is the first network address of the first mobile terminal, and the first encapsulated target address is the second mobile the second identification address corresponding to the terminal;

The gateway maps the second identification address to a second network address of the second mobile terminal;

The gateway sends the first encapsulated data packet to the second mobile terminal according to the second network address, so that the second mobile terminal decapsulates the first encapsulated data packet to obtain the first network address address.

In a third aspect, the embodiment of the present invention also provides a data packet transmission method, the method comprising:

The first mobile terminal sets an initial data packet to be sent to the second mobile terminal, the initial data packet includes the first identification address of the first mobile terminal; and the first source address in the initial data packet is the The first network address of the first mobile terminal, the first target address is the second identification address corresponding to the second mobile terminal;

sending the initial data packet to the second mobile terminal, so that the gateway maps the second identification address of the initial data packet to the second network address of the second mobile terminal.

In a fourth aspect, the embodiment of the present invention also provides a data packet transmission method, the method comprising:

The gateway receives the initial data packet sent by the first mobile terminal, the initial data packet includes the first identification address of the first mobile terminal; and the first source address in the initial data packet is the first mobile terminal The first network address of the first target address is the second identification address corresponding to the second mobile terminal;

The gateway maps the second identification address to a second network address of the second mobile terminal;

The gateway sends the initial data packet to the second mobile terminal according to the second network address, so that the second mobile terminal obtains the first network address from the initial data packet.

In the fifth aspect, the embodiment of the present invention also provides a data packet transmission device, the device comprising:

The setting unit is used for the first mobile terminal to set an initial data packet to be sent to the second mobile terminal, the first source address in the initial data packet is the first identification address corresponding to the first mobile terminal, and the first The target address is a second identification address corresponding to the second mobile terminal;

An encapsulation unit, configured to perform tunnel encapsulation on the initial data packet to obtain a first encapsulated data packet and send it, the first encapsulation source address in the first encapsulated data packet is the first network address of the first mobile terminal, The first encapsulation target address is the second identification address, so that the gateway maps the second identification address to the second network address of the second mobile terminal.

In a sixth aspect, the embodiment of the present invention also provides a data packet transmission device, the device comprising:

The receiving unit is used for the gateway to receive the first encapsulated data packet sent by the first mobile terminal, the first encapsulated source address in the first encapsulated data packet is the first network address of the first mobile terminal, and the first encapsulated target The address is a second identification address corresponding to the second mobile terminal;

a mapping unit, configured for the gateway to map the second identification address to a second network address of the second mobile terminal;

a sending unit, configured for the gateway to send the first encapsulated data packet to the second mobile terminal according to the second network address, so that the second mobile terminal decapsulates the first encapsulated data packet to obtain The first network address.

In the seventh aspect, the embodiment of the present invention also provides a device for transmitting data packets, the device comprising:

The setting unit is used for the first mobile terminal to set an initial data packet to be sent to the second mobile terminal, the initial data packet includes the first identification address of the first mobile terminal; and the first data packet in the initial data packet A source address is a first network address of the first mobile terminal, and a first target address is a second identification address corresponding to the second mobile terminal;

A sending unit, configured to send an initial data packet to the second mobile terminal, so that the gateway maps the second identification address in the initial data packet to a second network address of the second mobile terminal.

In the eighth aspect, the embodiment of the present invention also provides a data packet transmission device, the device comprising:

The receiving unit is used for the gateway to receive the initial data packet sent by the first mobile terminal, the initial data packet includes the first identification address of the first mobile terminal; and the first source address in the initial data packet is the The first network address of the first mobile terminal, the first target address is the second identification address corresponding to the second mobile terminal;

a mapping unit, configured for the gateway to map the second identification address to a second network address of the second mobile terminal;

a sending unit, configured for the gateway to send the initial data packet to the second mobile terminal according to the second network address, so that the second mobile terminal obtains the first network address from the initial data packet address.

In the data packet transmission method and device of this embodiment, the first mobile terminal and the second mobile terminal can use the identification address to send data packets to the opposite mobile terminal, and use the gateway to perform IP mapping. There is no influence on the data packets sent by the terminal and the second mobile terminal, and there is no need for an application server or other equipment to exchange network addresses before communicating between the mobile terminals, and the processing method is simple.

Description of drawings

Fig. 1 is the flowchart of the transmission method of data packet of the embodiment of the present invention;

Fig. 2 is another flow chart of the method for transmitting a data packet according to an embodiment of the present invention;

3 is a flowchart of a data packet transmission method according to another embodiment of the present invention;

4 is another flowchart of a data packet transmission method according to another embodiment of the present invention;

5 is a schematic diagram of a data packet transmission device according to an embodiment of the present invention;

6 is another schematic diagram of a data packet transmission device according to an embodiment of the present invention;

7 is a schematic diagram of a data packet transmission device according to another embodiment of the present invention;

FIG. 8 is another schematic diagram of a data packet transmission device according to another embodiment of the present invention.

Detailed ways

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

In the embodiment of the present invention, when the mobile communication packet domain network dynamically assigns an IP address to the UE, the mutual access of the packet domain terminals is directly realized, without the need of an application server or other methods for exchanging IP addresses between UEs first and then communicating.

The embodiment of the present invention can be used but not limited to various mobile communication packet domain networks: Long Term Evolution (LongTermEvolution, LTE), High Speed Downlink Packet Access (HighSpeedDownlinkPacketAccess, HSPA), Enhanced High Speed Downlink Packet Access (HSPAEvolution , HSPA+), Universal Mobile Telecommunications System (UMTS), called Code Division Multiple Access (CDMA), Time Division Synchronous Code Division Multiple Access (TimeDivision-Synchronous Code Division Multiple Access, TD-SCDMA), General Packet Radio Service (GeneralPacketRadioService, GPRS), enhanced data rate GSM evolution (EnhancedDataRateforGSMEvolution, EDGE), global microwave interconnection access (WorldwideInteroperabilityforMicrowaveAccess, WiMAX).

In the embodiment of the present invention, an identification address, that is, an Identity IP (Identity IP) address is added on top of an existing network address, such as an IP address allocation mechanism.

The identification IP is fixed and unique to each terminal, and the format can be IPv6 or IPv4, and is completely independent from the format of the IP address allocated by the network. In addition, the identification IP does not participate in the IP address allocation of network communication and does not occupy the IP address of network communication actual resources.

FIG. 1 is a flowchart of a data packet transmission method according to an embodiment of the present invention. As shown in the figure, this embodiment is a specific processing process on the UE side, including the following steps:

Step 101, the first mobile terminal UE1 sets an initial data packet to be sent to the second mobile terminal UE2, the first source address (first Src address) in the initial data packet is the first identification address I corresponding to the first mobile terminal -IP-1, the first destination address (first Dest address) is the second identification address I-IP-2 corresponding to UE2;

When UE1 sets the initial data packet to UE2, UE1 does not know the real network address of UE2, that is, IP-2, but only knows the identification address of UE2, that is, I-IP-2, and the identification address of UE2 is the same as that of UE The only corresponding and unchanged, so that it is convenient for UE1 to send data packets, such as IP data packets, for UE2.

Moreover, UE1 knows the network address IP-1 and the identification address I-IP-1 of the local end, so the first Src address in the initial data packet set to UE2 is filled with I-IP-1, and the first Dest address is filled with I -IP-2, specifically, can be filled by the application program of UE1.

Step 102, perform tunnel encapsulation on the initial data packet to obtain the first encapsulated data packet and send it, the first encapsulated source address (first encapsulated Src address) in the first encapsulated data packet is the first network address IP-1 of UE1, the An encapsulation target address (the first encapsulation Dest address) is the second identification address I-IP-2, so that the gateway maps the second identification address to the second network address IP-2 of UE2.

UE1 has an IP tunnel function, and encapsulates the initial IP data packet. The first encapsulated Src address of the encapsulated first encapsulated data packet is IP-1, the first encapsulated Dest address is I-IP-2, and the gateway maintains UE1 The network address IP-1 and identification address I-IP-1 of UE2 are maintained, and the network address IP-2 and identification address I-IP-2 of UE2 are also maintained; when the first encapsulated data packet sent by UE1 is received, the Encapsulate the first encapsulated Dest address I-IP-2 of the data packet, and the gateway uses the IP mapping function to map the first encapsulated Dest address I-IP-2 to the network address IP-2 of UE2.

As shown in Figure 1 again, the present embodiment also includes the following steps:

Step 103, UE2 receives the first encapsulated data packet;

Step 104, perform tunnel decapsulation on the first encapsulated data packet to obtain the first network address IP-1.

After receiving the first encapsulated data packet, UE2 decapsulates the first encapsulated data packet, obtains the initial IP data packet after decapsulation, and obtains the first encapsulated Src address as UE1's network address IP-1. At this time, UE2 has obtained the network address IP-1 of UE1 by receiving the first encapsulated data packet sent by UE1 this time, and also stores the fixed unique identification address I-IP-1 of UE1 itself.

Step 105, UE2 sets the reply data packet to be sent to UE1, the second source address (second Src address) in the reply data packet is the second identification address I-IP-2, and the second destination address (second Dest address) It is the first identification address I-IP-1; the reply data packet can be an IP data packet;

Because UE2 knows the network address IP-1 of UE1 and the identification address I-IP-1 of UE1, UE2 fills in I-IP-2 in the second Src address of the reply packet, and fills in I-IP in the second Dest address -1, specifically, can be filled in by the application program of UE1.

Step 106, perform tunnel encapsulation on the reply data packet to obtain a second encapsulated data packet and send it, the second encapsulation source address (second encapsulation Src address) in the second encapsulation data packet is the second network address IP-2, the second encapsulation The destination address (the second encapsulated Dest address) is the first network address IP-1, so that the gateway sends the second encapsulated data packet to UE1 according to the first network address.

UE2 also has an IP tunnel function, and encapsulates the IP reply data packet. The second encapsulated Src address of the encapsulated second encapsulated data packet is IP-2, and the second encapsulated Dest address is IP-1. When the gateway receives When sending the second encapsulated data packet, UE1 obtains the first encapsulated Dest address IP-1 of the encapsulated data packet.

Step 107, UE1 receives the second encapsulated data packet;

Step 108, perform tunnel decapsulation on the second encapsulated data packet to obtain the second network address IP2.

After UE1 receives the second encapsulated data packet, it decapsulates the second encapsulated data packet, obtains an IP reply data packet after decapsulation, and obtains the second encapsulated Src address as UE2's network address IP-2. At this time, UE1 has obtained the network address IP-2 of UE2 by receiving the second encapsulated data packet sent by UE2 this time, and also stores the fixed unique identification address I-IP-2 of UE2 itself.

In this way, UE1 can then send subsequent encapsulated data packets to UE2 like UE2 sending the second encapsulated data packet to UE1, because the network address IP-2 of UE2 has been obtained, so the encapsulated Dest address of subsequent encapsulated data packets can be directly filled in IP-2, instead of sending the first encapsulated packet, you can only fill in I-IP-2. After the gateway receives the subsequent encapsulated data packet, it can directly forward it according to the encapsulated Dset address IP-2, without IP mapping, and maps the second identification address to the second network address.

At this time, both UE1 and UE2 have the other party's network address IP and identification address I-IP, so that if it is necessary to send an encapsulated data packet to the other end, it is similar to the process of steps 105 and 106, and the network address can be directly The IP is filled in the Dest address of the encapsulated data packet, so that the gateway does not need to perform IP mapping processing, and the encapsulated data packet is sent directly according to the Dest address.

Fig. 2 is another flow chart of the transmission method of the data packet of the embodiment of the present invention, as shown in the figure, this embodiment is the specific processing process of the gateway side corresponding to the previous embodiment, including the following steps:

Step 201, the gateway receives the first encapsulated data packet sent by UE1, the first encapsulated source address (first encapsulated Src address) in the first encapsulated data packet is the first network address IP-1 of UE1, and the first encapsulated target address ( The first encapsulation Dest address) is the second identification address I-IP-2 corresponding to UE2;

Step 202, mapping the second identification address to the second network address of UE2;

The gateway maintains the network address IP-1 and identification address I-IP-1 of UE1, and also maintains the network address IP-2 and identification address I-IP-2 of UE2; when receiving the first encapsulated data packet sent by UE1 , the first encapsulated Dest address I-IP-2 of the encapsulated data packet is obtained, and the gateway uses the IP mapping function to map the first encapsulated Dest address I-IP-2 to the network address IP-2 of UE2.

Step 203: Send the first encapsulated data packet to UE2 according to the second network address IP-2, so that UE2 decapsulates the first encapsulated data packet to obtain the first network address IP-1.

As shown in Figure 2 again, the present embodiment also includes the following steps:

Step 204, the gateway receives the second encapsulated data packet sent by UE2, the second encapsulated source address (second encapsulated Src address) in the second encapsulated data packet is the second network address IP-2 of UE2, and the second encapsulated target address ( The second encapsulation Dest address) is the first network address IP-1;

Step 205: Send the second encapsulated data packet to UE1 according to the first network address, so that UE1 decapsulates the second encapsulated data packet to obtain the second network address IP-2.

Because UE2 obtains the first network address IP-1 of UE1 when receiving the first encapsulated data packet of UE1, so when encapsulating the second encapsulated data packet, fill in the second encapsulated Dest address as IP-1 , so that when the gateway receives the second encapsulated data packet, the second encapsulated Dest address is IP-1, and the second encapsulated data packet can be directly sent to UE1 according to IP-1. UE1 decapsulates the second encapsulated data packet to obtain the second network address IP-2 of UE2. When UE1 subsequently sends a procedure-encapsulated data packet to UE2, the encapsulated Dest address of the subsequent encapsulated data packet can be directly filled in IP-2, so that the gateway can directly send the subsequent encapsulated data packet to UE2 according to IP-2 without further Use IP mapping.

The transmission method of the data packet in the embodiment of the present invention encapsulates the initial data packet on the UE side, and when the target address of the network address is not known, it is encapsulated into the target address of the identification address, IP mapping can be performed at the gateway of the network layer, and the identification address It is mapped to a network address without requiring the terminal side to know the network address of the target terminal, which can solve the problem of UE’s initial IP address change. The UE at the application layer only needs to know the identity IP of itself and the target UE. It is completely transparent and does not require an application server or other equipment to exchange IP addresses between UEs before communicating with UEs. The processing method is simple.

FIG. 3 is a flowchart of another data packet transmission method according to an embodiment of the present invention. As shown in the figure, this embodiment is a specific processing process on the UE side, including the following steps:

Step 301, UE1 sets an initial data packet to be sent to UE2, the initial data packet includes UE1's first identification address I-IP-1; and the first source address (first Src address) in the initial data packet is UE1's The first network address IP-1, the first destination address (the first Dest address) is the second identification address I-IP-2 corresponding to UE2; the initial data packet may be an IP data packet;

When UE1 sends the initial data packet to UE2, UE1 does not know the real network address of UE2, namely IP-2, but only knows the identification address of UE2, namely I-IP-2, and the identification address of UE2 is fixed and unique Moreover, it remains unchanged, so that it is convenient for UE1 to send IP data packets for UE2.

Moreover, UE1 knows the network address IP-1 and the identification address I-IP-1 of the local end, so in the initial data packet sent to UE2, the first Src of UE1 is filled with the network address IP-1 of UE1, and the first Dest address is filled with The identification address I-IP-2 of UE2, specifically, can be filled in by the application program of UE1. In addition, the first identification address I-IP-1 of UE1 may be included in the payload (Payload) of the data packet.

Step 302: Send an initial data packet to UE2, so that the gateway maps the second identification address of the initial data packet to the second network address of UE2.

The gateway maintains the network address IP-1 and identification address I-IP-1 of UE1, and also maintains the network address IP-2 and identification address I-IP-2 of UE2; when receiving the IP initial data packet sent by UE1 , to obtain the first Dest address I-IP-2 of the initial data packet, the gateway uses the IP mapping function to map the first Dest address I-IP-2 to the network address IP-2 of UE2; -2 Send the initial data packet to UE2.

As shown in Figure 3 again, the present embodiment also includes the following steps:

Step 303, UE2 receives the initial data packet;

Step 304. Obtain the first network address IP-1 from the initial data packet.

After receiving the IP initial data packet, UE2 obtains the network address IP-1 of UE1 with the first Src address and IP-2 of the first Dest, and obtains the identification address I-IP of UE1 from the Payload of the IP data packet -1, knowing that the data packet is sent by UE1 to itself.

At this time, UE2 has obtained the network address IP-1 of UE1 by receiving the IP initial data packet sent by UE1 this time, and also stores the fixed and unique identification address I-IP-1 of UE1 itself.

Step 305, UE2 sets a reply data packet to be sent to UE1, the reply data packet includes the second identification address I-IP-2 corresponding to UE2; the second source address (second Src address) in the reply data packet is the first The second network address IP-2, the second destination address (the second Dest address) is the first network address IP-1;

Because UE2 knows the network address IP-1 of UE1, UE2 fills in IP-2 in the second Src address of the IP reply packet, and fills in IP-1 in the second Dest address. Specifically, it can be filled in by the application program of UE2. In addition, the Payload of the data packet includes the identification address information I-IP-2 of UE2 itself.

Step 306: Send a reply data packet to UE1, so that the gateway sends the reply data packet to UE1 according to the first network address.

After the gateway receives the IP data packet, because the second Dest address is the network address IP-1, it no longer needs its IP mapping function to process, and directly sends the encapsulated IP data packet to UE1 according to the Dest address IP-1.

Step 307, UE1 receives the reply data packet, and obtains the second network address IP-2.

After UE1 receives the IP reply packet, the second Src address recognized is the network address IP-2, and the second Dest address is the network address IP-1. In addition, UE2’s identification address I can be obtained from the Payload of the IP reply packet. -IP-2, and also stores the fixed unique identification address I-IP-2 of UE2.

In this way, UE1 can send subsequent data packets to UE2 in the same way that UE2 sends a reply packet to UE1, because the network address IP-2 of UE2 has been obtained, so the Dest address of subsequent data packets can be directly filled in IP-2. Instead of sending the initial data packet, only I-IP-2 can be filled in. After the gateway receives the subsequent data packet, it can directly forward it according to the Dset address without performing IP mapping, and maps the second identification address to the second network address.

At this time, both UE1 and UE2 have the other party's network address IP and identification address I-IP, so that if it is necessary to send an IP data packet to the other end, it is similar to the process of steps 305 and 306, and the network address can be directly The IP is filled in the Dest address of the IP data packet, so that the gateway does not need to perform IP mapping processing, and the IP data packet is directly sent according to the Dest address.

FIG. 4 is another flow chart of another data packet transmission method according to an embodiment of the present invention. As shown in the figure, this embodiment is a specific processing process on the gateway side corresponding to the previous embodiment, including the following steps:

Step 401, the gateway receives the initial data packet sent by UE1, the initial data packet includes UE1's first identification address I-IP-1; and the first source address (first Src address) in the initial data packet is UE1's first The network address IP-1, the first destination address (first Dest address) is the second identification address I-IP-2 corresponding to UE2; the initial data packet may be an IP data packet;

The gateway maintains the network address IP-1 and identification address I-IP-1 of UE1, and also maintains the network address IP-2 and identification address I-IP-2 of UE2; when receiving the IP initial data packet sent by UE1 , to obtain the first Dest address I-IP-2 of the initial data packet.

Step 402, mapping the second identification address to the second network address of UE2;

The gateway uses the IP mapping function to map the first Dest address I-IP-2 to the network address IP-2 of UE2,

Step 403: Send an initial data packet to UE2 according to the second network address, so that UE2 obtains the first network address IP-1 from the initial data packet.

The gateway sends the initial data packet to UE2 according to the network address IP-2 of UE2,

As shown in Figure 4 again, the present embodiment also includes the following steps:

Step 404, the gateway receives the reply data packet sent by UE2, the reply data packet includes the second identification address I-IP-2 corresponding to UE2; the second source address (second Src address) in the reply data packet is the second network address Address IP-2, the second destination address (second Dest address) is the first network address IP-1;

Step 405: Send a reply data packet to UE1 according to the first network address, so that UE1 obtains the second network address IP-2 from the reply data packet.

After the gateway receives the IP data packet, because the second Dest address is the network address IP-1, it no longer needs its IP mapping function to process, and directly sends the encapsulated IP data packet to UE1 according to the Dest address IP-1.

Because UE2 gets UE1's first network address IP-1 when it receives UE1's initial data packet, so when setting the reply packet, fill in the second Dest address as IP-1, so that the gateway receives When replying the data packet, the second Dest address is IP-1, and the reply data packet can be sent to UE1 directly according to IP-1. UE1 obtains the second network address IP-2 of UE2. When UE1 sends a procedure data packet to UE2, the encapsulation Dest address of the subsequent data packet can directly fill in IP-2, so that the gateway can directly send the subsequent data packet to UE2 according to IP-2, without using IP mapping .

In the data packet transmission method of this embodiment, when the application layer UE sends the initial data packet, the I-IP of the terminal is carried in the load, and the I-IP of the target terminal is filled in the Dest address, and the IP address is carried out by using the gateway on the network side. Mapped to the IP address of the target terminal, the target terminal can obtain the IP address of the source terminal according to the initial data packet. The target terminal informs the source terminal of the IP address of the target terminal in the reply data packet, so that the terminal does not need to know the IP address of the peer terminal when sending the data packet, and also solves the problem of the initial IP change of the UE, without the need for an application server or other devices to The UEs exchange IP addresses before communicating, and the processing method is simple. Moreover, the UE does not need to have an IP tunnel function, and does not increase the size of the IP packet.

FIG. 5 is a schematic diagram of a data packet transmission device according to an embodiment of the present invention. As shown in the figure, this embodiment specifically includes: a setting unit 11 and a packaging unit 12 .

The setting unit 11 is used for the first mobile terminal UE1 to set the initial data packet to be sent to the second mobile terminal UE2, and the first source address (first Src address) in the initial data packet is the first identifier corresponding to the first mobile terminal Address I-IP-1, the first destination address (first Dest address) is the second identification address I-IP-2 corresponding to UE2;

The encapsulation unit 12 is configured to perform tunnel encapsulation on the initial data packet to obtain a first encapsulated data packet and send it, and the first encapsulation source address (first encapsulation Src address) in the first encapsulated data packet is the first network address IP-1 of UE1 , the first encapsulation destination address (the first encapsulation Dest address) is the second identification address I-IP-2, so that the gateway maps the second identification address to the second network address IP-2 of UE2.

UE1 has an IP tunnel function, and encapsulates the initial IP data packet. The first encapsulated Src address of the encapsulated first encapsulated data packet is IP-1, the first encapsulated Dest address is I-IP-2, and the gateway maintains UE1 The network address IP-1 and identification address I-IP-1 of UE2 are maintained, and the network address IP-2 and identification address I-IP-2 of UE2 are also maintained; when the first encapsulated data packet sent by UE1 is received, the Encapsulate the first encapsulated Dest address I-IP-2 of the data packet, and the gateway uses the IP mapping function to map the first encapsulated Dest address I-IP-2 to the network address IP-2 of UE2.

As shown in FIG. 5 , this embodiment further includes a receiving unit 13 and a decapsulating unit 14 .

The receiving unit 13 is used for UE2 to receive the first encapsulated data packet; the decapsulating unit 14 is used for tunnel decapsulating the first encapsulated data packet to obtain the first network address IP-1.

The setting unit 12 is also used for UE2 to set the reply data packet to be sent to UE1, the second source address (second Src address) in the reply data packet is the second identification address I-IP-2, and the second destination address ( The second Dest address) is the first identification address I-IP-1; the reply data packet may be an IP data packet;

The encapsulation unit 13 is also used to perform tunnel encapsulation on the reply data packet to obtain a second encapsulated data packet and send it, and the second encapsulation source address (second encapsulation Src address) in the second encapsulated data packet is the second network address IP- 2. The second encapsulation destination address (second encapsulation Dest address) is the first network address IP-1, so that the gateway sends the second encapsulation data packet to UE1 according to the first network address.

The receiving unit 13 is also used for UE1 to receive the second encapsulated data packet; the decapsulating unit 14 is also used for performing tunnel decapsulation on the second encapsulated data packet to obtain the second network address IP2. The initial data packet is an Internet Protocol IP data packet, the first network address and the second network address are IP addresses, and the first identification address and the second identification address are identification IP addresses.

At this time, both UE1 and UE2 have the other party's network address IP and identification address I-IP, so that if it is necessary to send an encapsulated data packet to the other end, it is similar to the process of steps 105 and 106, and the network address can be directly The IP is filled in the Dest address of the encapsulated data packet, so that the gateway does not need to perform IP mapping processing, and the encapsulated data packet is sent directly according to the Dest address.

FIG. 6 is another schematic diagram of a data packet transmission device according to an embodiment of the present invention. As shown in the figure, this embodiment specifically includes: a receiving unit 21 , a mapping unit 22 and a sending unit 23 .

The receiving unit 21 is used for the gateway to receive the first encapsulated data packet sent by UE1, the first encapsulated source address (first encapsulated Src address) in the first encapsulated data packet is the first network address IP-1 of UE1, and the first encapsulated target The address (first encapsulated Dest address) is the second identification address I-IP-2 corresponding to UE2;

The mapping unit 22 is configured to map the second identification address to a second network address of UE2;

The sending unit 23 is configured to send the first encapsulated data packet to UE2 according to the second network address IP-2, so that UE2 decapsulates the first encapsulated data packet to obtain the first network address IP-1.

The receiving unit 21 is also used for the gateway to receive the second encapsulated data packet sent by UE2, the second encapsulated source address (second encapsulated Src address) in the second encapsulated data packet is the second network address IP-2 of UE2, the second The destination address of the second encapsulation (the second encapsulation Dest address) is the first network address IP-1;

The sending unit 23 is further configured to send the second encapsulated data packet to UE1 according to the first network address, so that UE1 decapsulates the second encapsulated data packet to obtain the second network address IP-2. The first network address and the second network address are IP addresses, and the first identification address and the second identification address are identification IP addresses.

The data packet transmission device in the embodiment of the present invention encapsulates the initial data packet on the UE side, and when the target address of the network address is not known, it is encapsulated into the target address of the identification address, and IP mapping can be performed at the gateway of the network layer, and the identification address It is mapped to a network address without requiring the terminal side to know the network address of the target terminal, which can solve the problem of UE’s initial IP address change. The UE at the application layer only needs to know the identity IP of itself and the target UE. It is completely transparent, and does not require an application server or other equipment to exchange IP addresses between UEs before communicating with UEs, and the processing is simple.

FIG. 7 is a schematic diagram of a data packet transmission device according to another embodiment of the present invention. As shown in the figure, this embodiment specifically includes: a setting unit 31 and a sending unit 32 .

The setting unit 31 is used for UE1 to set an initial data packet to be sent to UE2, the initial data packet includes the first identification address I-IP-1 of UE1; and the first source address (first Src address) in the initial data packet It is the first network address IP-1 of UE1, and the first destination address (first Dest address) is the second identification address I-IP-2 corresponding to UE2; the initial data packet may be an IP data packet address;

The sending unit 32 is configured to send the initial data packet to UE2, so that the gateway maps the second identification address of the initial data packet to the second network address of UE2.

As shown in FIG. 7 , this embodiment further includes: a receiving unit 33 and an acquiring unit 34 .

The receiving unit 33 is used for UE2 to receive the initial data packet; the obtaining unit 34 is used for obtaining the first network address IP-1 from the initial data packet.

The setting unit 31 is also used for UE2 to set a reply data packet to be sent to UE1, the reply data packet includes the second identification address I-IP-2 corresponding to UE2; the second source address (second source address) in the reply data packet Src address) is the second network address IP-2, and the second destination address (second Dest address) is the first network address IP-1;

The sending unit 32 is further configured to send a reply data packet to UE1, so that the gateway sends the reply data packet to UE1 according to the first network address.

The receiving unit 33 is also used for UE1 to receive the reply data packet to obtain the second network address IP-2. The initial data packet specifically includes the first identification address in the payload Payload; the reply data packet specifically includes the second identification address in the payload. The first network address and the second network address are IP addresses, and the first identification address and the second identification address are identification IP addresses.

At this time, both UE1 and UE2 have the other party's network address IP and identification address I-IP, so that if it is necessary to send an IP data packet to the other end, it is similar to the process of steps 305 and 306, and the network address can be directly The IP is filled in the Dest address of the IP data packet, so that the gateway does not need to perform IP mapping processing, and the IP data packet is directly sent according to the Dest address.

FIG. 8 is another schematic diagram of a data packet transmission device according to another embodiment of the present invention. As shown in the figure, this embodiment specifically includes: a receiving unit 41 , a mapping unit 42 and a sending unit 43 .

The receiving unit 41 is used for the gateway to receive the initial data packet sent by UE1, the initial data packet includes the first identification address I-IP-1 of UE1; and the first source address (first Src address) in the initial data packet is UE1's The first network address IP-1, the first destination address (the first Dest address) is the second identification address I-IP-2 corresponding to UE2; the initial data packet may be an IP data packet;

The mapping unit 42 is configured to map the second identification address to a second network address of UE2;

The sending unit 43 is configured to send the initial data packet to UE2 according to the second network address, so that UE2 obtains the first network address IP-1 from the initial data packet.

The receiving unit 41 is also used for the gateway to receive the reply data packet sent by UE2, the reply data packet includes the second identification address I-IP-2 corresponding to UE2; the second source address (second Src address) in the reply data packet ) is the second network address IP-2, and the second destination address (the second Dest address) is the first network address IP-1;

The sending unit 43 is further configured to send a reply data packet to UE1 according to the first network address, so that UE1 obtains the second network address IP-2 from the reply data packet. The initial data packet specifically includes the first identification address in the payload; the reply data packet specifically includes the second identification address in the payload. The first network address and the second network address are IP addresses, and the first identification address and the second identification address are identification IP addresses.

The device for transmitting data packets in this embodiment carries the I-IP of the terminal in the payload when the UE at the application layer sends the initial data packet, and fills in the I-IP of the target terminal in the Dest address, and uses the gateway on the network side to carry out IP Mapped to the IP address of the target terminal, the target terminal can obtain the IP address of the source terminal according to the initial data packet. The target terminal informs the source terminal of the IP address of the target terminal in the reply data packet, so that the terminal does not need to know the IP address of the peer terminal when sending the data packet, and also solves the problem of the initial IP change of the UE, without the need for an application server or other devices to The UEs exchange IP addresses before communicating, and the processing method is simple. Moreover, the UE does not need to have an IP tunnel function, and does not increase the size of the IP packet.

Professionals should further realize that the units and algorithm steps described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the relationship between hardware and software Interchangeability. In the above description, the composition and steps of each example have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

The steps of the methods or algorithms described in connection with the embodiments disclosed herein may be implemented by hardware, software modules executed by a processor, or a combination of both. Software modules can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other Any other known storage medium.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (28)

1. A transmission method of data packet, is characterized in that, described method comprises: The first mobile terminal sets an initial data packet to be sent to the second mobile terminal, the first source address in the initial data packet is the first identification address corresponding to the first mobile terminal, and the first target address is the The second identification address corresponding to the second mobile terminal, the identification address is fixed and unique to each terminal, and is completely independent of the Internet protocol IP address format allocated by the network; Perform tunnel encapsulation on the initial data packet to obtain a first encapsulated data packet and send it, the first encapsulation source address in the first encapsulation data packet is the first network address of the first mobile terminal, and the first encapsulation target address being the second identification address, so that the gateway maps the second identification address to the second network address of the second mobile terminal; The initial data packet is an IP data packet, the first network address and the second network address are IP addresses, and the first identification address and the second identification address are identification IP addresses. 2. The method according to claim 1, characterized in that the method further comprises: The second mobile terminal receives the first encapsulated data packet; performing tunnel decapsulation on the first encapsulated data packet to obtain the first network address. 3. The method according to claim 2, wherein the method further comprises: The second mobile terminal sets a reply data packet to be sent to the first mobile terminal, the second source address in the reply data packet is the second identification address, and the second target address is the first identification address; performing tunnel encapsulation on the reply data packet to obtain a second encapsulated data packet and sending it, the second encapsulation source address in the second encapsulation data packet is the second network address, and the second encapsulation target address is the first network address, so that the gateway sends the second encapsulated data packet to the first mobile terminal according to the first network address. 4. method according to claim 3, is characterized in that, described method also comprises: The first mobile terminal receives the second encapsulated data packet; performing tunnel decapsulation on the second encapsulated data packet to obtain the second network address. 5. A transmission method of data packet, is characterized in that, described method comprises: The gateway receives the first encapsulated data packet sent by the first mobile terminal, the first encapsulated source address in the first encapsulated data packet is the first network address of the first mobile terminal, and the first encapsulated target address is the second mobile The second identification address corresponding to the terminal, the identification address is fixed and unique to each terminal, and is completely independent from the Internet Protocol IP address format allocated by the network; The gateway maps the second identification address to a second network address of the second mobile terminal; The gateway sends the first encapsulated data packet to the second mobile terminal according to the second network address, so that the second mobile terminal decapsulates the first encapsulated data packet to obtain the first network address address; The first network address and the second network address are IP addresses, and the first identification address and the second identification address are identification IP addresses. 6. The transmission method of data packet according to claim 5, is characterized in that, described method also comprises: The gateway receives the second encapsulated data packet sent by the second mobile terminal, the second encapsulated source address in the second encapsulated data packet is the second network address of the second mobile terminal, and the second encapsulated target address is the first network address; sending the second encapsulated data packet to the first mobile terminal according to the first network address, so that the first mobile terminal decapsulates the second encapsulated data packet to obtain the second network address. 7. A method for transmitting data packets, characterized in that the method comprises: The first mobile terminal sets an initial data packet to be sent to the second mobile terminal, the initial data packet includes the first identification address of the first mobile terminal; and the first source address in the initial data packet is the The first network address of the first mobile terminal, the first target address is the second identification address corresponding to the second mobile terminal, the identification address is fixed and unique to each terminal, and is consistent with the Internet Protocol IP address assigned by the network The address format is completely independent; sending an initial data packet to the second mobile terminal, so that the gateway maps the second identification address of the initial data packet to the second network address of the second mobile terminal; The first network address and the second network address are IP addresses, and the first identification address and the second identification address are identification IP addresses. 8. The transmission method of data packet according to claim 7, is characterized in that, described method also comprises: The second mobile terminal receives the initial data packet; The first network address is obtained from the initial data packet. 9. The method of claim 8, further comprising: The second mobile terminal sets a reply data packet to be sent to the first mobile terminal, and the reply data packet includes a second identification address corresponding to the second mobile terminal; the second identification address in the reply data packet The second source address is the second network address, and the second destination address is the first network address; sending a reply data packet to the first mobile terminal, so that the gateway sends the reply data packet to the first mobile terminal according to the first network address. 10. The method according to claim 9, further comprising: The first mobile terminal receives the reply data packet to obtain the second network address. 11. The transmission method of the data packet according to claim 9 or 10, wherein the initial data packet specifically includes the first identification address in the load; the reply data packet specifically includes the first identification address in the load; The second identification address. 12. A method for transmitting data packets, characterized in that the method comprises: The gateway receives the initial data packet sent by the first mobile terminal, the initial data packet includes the first identification address of the first mobile terminal; and the first source address in the initial data packet is the first mobile terminal The first network address, the first target address is the second identification address corresponding to the second mobile terminal, the identification address is fixed and unique to each terminal, and is completely independent of the Internet Protocol IP address format assigned by the network; The gateway maps the second identification address to a second network address of the second mobile terminal; The gateway sends the initial data packet to the second mobile terminal according to the second network address, so that the second mobile terminal obtains the first network address from the initial data packet; The first network address and the second network address are IP addresses, and the first identification address and the second identification address are identification IP addresses. 13. The transmission method of the data packet according to claim 12, characterized in that, the method further comprises: The gateway receives the reply data packet sent by the second mobile terminal, the reply data packet includes the second identification address corresponding to the second mobile terminal; the second source address in the reply data packet is the The second network address, the second target address is the first network address; sending the reply data packet to the first mobile terminal according to the first network address, so that the first mobile terminal obtains the second network address from the reply data packet. 14. The method for transmitting a data packet according to claim 13, wherein the initial data packet specifically includes the first identification address in the payload; the reply packet specifically includes the second identification address in the payload. Identify the address. 15. A data packet transmission device, characterized in that the device comprises: a setting unit and an encapsulation unit; The setting unit is used for the first mobile terminal to set an initial data packet to be sent to the second mobile terminal, the first source address in the initial data packet is the first identification address corresponding to the first mobile terminal, and the first The target address is the second identification address corresponding to the second mobile terminal, the identification address is fixed and unique to each terminal, and is completely independent from the Internet Protocol IP address format allocated by the network; An encapsulation unit, configured to perform tunnel encapsulation on the initial data packet to obtain a first encapsulated data packet and send it, the first encapsulation source address in the first encapsulated data packet is the first network address of the first mobile terminal, The first encapsulation target address is the second identification address, so that the gateway maps the second identification address to the second network address of the second mobile terminal; The initial data packet is an IP data packet, the first network address and the second network address are IP addresses, and the first identification address and the second identification address are identification IP addresses. 16. The device according to claim 15, further comprising: a receiving unit, configured for the second mobile terminal to receive the first encapsulated data packet; The decapsulation unit is configured to tunnel decapsulate the first encapsulated data packet to obtain the first network address. 17. The device of claim 16, wherein: The setting unit is also used for the second mobile terminal to set a reply data packet to be sent to the first mobile terminal, the second source address in the reply data packet is the second identification address, and the second target The address is the first identification address; The encapsulation unit is further configured to perform tunnel encapsulation on the reply data packet to obtain a second encapsulated data packet and send it, the second encapsulated source address in the second encapsulated data packet is the second network address, and the second encapsulated The target address is the first network address, so that the gateway sends the second encapsulated data packet to the first mobile terminal according to the first network address. 18. The device of claim 17, wherein: The receiving unit is also used for the first mobile terminal to receive the second encapsulated data packet; The decapsulating unit is further configured to tunnel decapsulate the second encapsulated data packet to obtain the second network address. 19. A data packet transmission device, characterized in that the device comprises: a receiving unit, a mapping unit and a sending unit; The receiving unit is used for the gateway to receive the first encapsulated data packet sent by the first mobile terminal, the first encapsulated source address in the first encapsulated data packet is the first network address of the first mobile terminal, and the first encapsulated target The address is a second identification address corresponding to the second mobile terminal, the identification address is fixed and unique to each terminal, and is completely independent of the Internet Protocol IP address format allocated by the network; a mapping unit, configured for the gateway to map the second identification address to a second network address of the second mobile terminal; a sending unit, configured for the gateway to send the first encapsulated data packet to the second mobile terminal according to the second network address, so that the second mobile terminal decapsulates the first encapsulated data packet to obtain said first network address; The first network address and the second network address are IP addresses, and the first identification address and the second identification address are identification IP addresses. 20. The device for transmitting data packets according to claim 19, characterized in that: The receiving unit is also used for the gateway to receive the second encapsulated data packet sent by the second mobile terminal, and the second encapsulated source address in the second encapsulated data packet is the second network of the second mobile terminal address, where the second encapsulation target address is the first network address; The sending unit is further configured to send the second encapsulated data packet to the first mobile terminal according to the first network address, so that the first mobile terminal decapsulates the second encapsulated data packet to obtain the the second network address. 21. A data packet transmission device, characterized in that the device comprises a setting unit and a sending unit: The setting unit is used for the first mobile terminal to set an initial data packet to be sent to the second mobile terminal, the initial data packet includes the first identification address of the first mobile terminal; and the first data packet in the initial data packet A source address is the first network address of the first mobile terminal, the first target address is the second identification address corresponding to the second mobile terminal, the identification address is fixed and unique to each terminal, and is the same as The Internet Protocol IP address format assigned by the network is completely independent; a sending unit, configured to send an initial data packet to the second mobile terminal, so that the gateway maps the second identification address in the initial data packet to a second network address of the second mobile terminal; The first network address and the second network address are IP addresses, and the first identification address and the second identification address are identification IP addresses. 22. The device for transmitting data packets according to claim 21, wherein the device further comprises: a receiving unit, configured for the second mobile terminal to receive the initial data packet; An obtaining unit, configured to obtain the first network address from the initial data packet. 23. The device of claim 22, wherein: The setting unit is also used for the second mobile terminal to set a reply data packet to be sent to the first mobile terminal, and the reply data packet includes a second identification address corresponding to the second mobile terminal; The second source address in the reply data packet is the second network address, and the second target address is the first network address; The sending unit is further configured to send a reply data packet to the first mobile terminal, so that the gateway sends the reply data packet to the first mobile terminal according to the first network address. 24. The device according to claim 23, wherein the receiving unit is further configured for the first mobile terminal to receive the reply data packet to obtain the second network address. 25. The device for transmitting data packets according to claim 23 or 24, wherein the initial data packet specifically includes the first identification address in the load; the reply data packet specifically includes the first identification address in the load; The second identification address. 26. A data packet transmission device, characterized in that the device comprises: a receiving unit, a mapping unit and a sending unit; The receiving unit is used for the gateway to receive the initial data packet sent by the first mobile terminal, the initial data packet includes the first identification address of the first mobile terminal; and the first source address in the initial data packet is the The first network address of the first mobile terminal, the first target address is the second identification address corresponding to the second mobile terminal, the identification address is fixed and unique to each terminal, and is consistent with the Internet Protocol IP address assigned by the network The address format is completely independent; a mapping unit, configured for the gateway to map the second identification address to a second network address of the second mobile terminal; a sending unit, configured for the gateway to send the initial data packet to the second mobile terminal according to the second network address, so that the second mobile terminal obtains the first network address from the initial data packet address; The first network address and the second network address are IP addresses, and the first identification address and the second identification address are identification IP addresses. 27. The device for transmitting data packets according to claim 26, characterized in that: The receiving unit is also used for the gateway to receive the reply data packet sent by the second mobile terminal, the reply data packet includes the second identification address corresponding to the second mobile terminal; the reply data packet The second source address is the second network address, and the second destination address is the first network address; The sending unit is further configured to send the reply data packet to the first mobile terminal according to the first network address, so that the first mobile terminal obtains the second network address from the reply data packet . 28. The data packet transmission device according to claim 27, characterized in that, the initial data packet specifically includes the first identification address in the load; the reply data packet specifically includes the second identification address in the load. Identify the address.