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Method and device for sending data packet based on dual-stack (DS)-LITE
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A sending method and data packet technology, which is applied in the field of communication, can solve problems such as the inability to guarantee the uniqueness of DS_LITE tunnel identifiers, and achieve the effect of ensuring uniqueness
Inactive Publication Date: 2015-07-22
ZTE CORP
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Problems solved by technology
Aiming at the problem that the uniqueness of DS_LITE tunnel identifiers connected to different P-GWs of the same CGN cannot be guaranteed in related technologies, the present invention provides a method and device for sending data packets based on DS-LITE to solve at least one of the above problems one
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example 1
[0057] Image 6 It is a flowchart of Example 1 of the present invention. Such as Image 6 As shown, the uplink data packet is encapsulated from the P-GW and sent to the CGN for NAT translation, and then the uplink data packet is sent to the packet data network. The process specifically includes the following processing (step S602-step S606):
[0058] Step S602: the packet data gateway generates a DS_LITE tunnel identifier, and packs the uplink data packet into the DS_LITE tunnel;
[0059] Step S604: CGN unlocks the DS_LITE tunnel, and performs NAT translation according to the source address port number, tunnel identifier and P-GW identifier;
[0060] Step S606: After the CGN successfully executes the NAT translation, it records the corresponding relationship between the address and the port number and the DS_LITE tunnel ID and P-GW ID corresponding to the uplink data packet in the NAT table.
[0061] Preferably, before performing step S506, the following processing may also...
example 2
[0072] Figure 7 It is the flowchart of Example 2 of the present invention. Such as Figure 7 As shown, the downlink data packet is NAT-translated through the CGN, then encapsulated into different DS-LITE tunnels and delivered to the P-GW. This process specifically includes the following processing (step S702-step S708):
[0073] Step S702: the CGN receives the data packet sent by the external packet network;
[0074] Step S704: The CGN performs NAT translation on the data packet according to the IP address and port number, as well as the tunnel identifier and the P-GW identifier in the NAT table;
[0075] Step S706: The CGN sends the downlink data packet to the packet data gateway through the DS-LITE tunnel according to the result of NAT translation;
[0076]Step S708: After receiving the data packet, the packet data gateway decapsulates the DS_LITE tunnel, encapsulates the data packet in the mobile tunnel and forwards it to the mobile terminal according to the correspondi...
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Abstract
The invention discloses a method and a device for sending a data packet based on a dual-stack (DS)-LITE. In the method, an uplink data packet sent from a mobile terminal is received by a carrier grade network (CGN) through a DS-LITE tunnel; the uplink data packet is analyzed by the CGN to obtain identification information of the DS-LITE tunnel and the identification information of packet data network gateway (P-GWs); and a downlink data packet is packaged by the CGN according to the identification information of the DS-LITE tunnel, and the packaged downlink data packet is sent to the mobile terminal by the P-GW corresponding to the P-GW identification information. According to the technical scheme provided by the invention, the uniqueness of DS-LITE tunnel identification on the different P-GWs connected to the identical CGN can be ensured, so that one-to-one network address translation (NAT) mapping on internet protocol (IP) connection with the identical tunnel identification on the different P-GWs can be realized.
Description
technical field [0001] The present invention relates to the communication field, in particular, to a data packet sending method and device based on Dual-Stack Lite (DS-Lite for short). Background technique [0002] The Evolved Packet System (EPS) of the 3rd Generation Partnership Project (3rd Generation Partnership Project, referred to as 3GPP) is composed of the Evolved Universal Terrestrial Radio Access Network (Evolved Universal Terrestrial Radio Access Network, referred to as E-UTRAN), Mobility Management Entity (MME for short), Serving Gateway (S-GW for short), Packet Data Network Gateway (P-GW or PDN GW for short), home user Server (Home Subscriber Server, HSS for short), policy and charging rule function (Policy and ChargingRules Function, PCRF for short) entity and other support nodes. [0003] The Internet Protocol Version 6 (IPv6) transition method was first studied by the IETFNGTRAN working group in 1994. In 1996, 6Bone was established for experiments. In 1998, t...
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