System and method for 3G data packet reorganization based on FPGA

Abstract

The invention discloses a system and a method for 3G data packet reorganization based on FPGA. The system comprises an EMAC core module and a user interface module, wherein the user interface module comprises a message type processing module, an HASH module, an IMSI memory module, a read-write control module, an IMSI insert module and an IMSI nonempty judgment module. The method comprises the steps of extracting user identity information IMSI according to a control signaling protocol between SGSN and GGSN, storing IMSI information according to TEID-CP and TEID-DII, binding and transmitting user on / off-line state information and the user identity information to a back end for processing, searching data packets in a user data protocol GTP-U for the IMSI according to head TEID-DII, binding user data to the IMSI to reorganize the data packets, and sending different user data packets to the back end for processing according to different protocol types of application layers. The invention has the advantages of improving the efficiency of overall monitoring systems and ensuring high speed.

Description

technical field [0001] The invention relates to an FPGA-based 3G data packet recombination system and method, and belongs to the data recombination system and method in the field of TD-SCDMA network security. Background technique [0002] 3G mobile communication technology mainly includes three standard systems: TD-SCDMA standard in China, WCDMA standard in Europe and Japan and CDMA2000 standard in the United States. The TD-SCDMA standard and WCDMA standard have inherited the original core network structure of GSM, and their data packets are uniformly encapsulated in the GTP protocol. Therefore, if all the GTP protocols are obtained, the core network data information of all mobile users can be monitored. The GTP protocol is divided into GTP-C and GTP-U. Among them, GTP-C is a user signaling protocol, and some signaling protocols include the International Mobile Subscriber Identity (IMSI). GTP-U encapsulates user data information, does not contain the IMSI that marks the use...

AI Technical Summary

Problems solved by technology

However, due to the supervision of a large number of users, it is necessary to dynamically access a large number of user identity information (IMSI). The software often uses a tree table in the data structure to implement. According to the test, the software realizes the binding of user data and user identity, and the processing speed Can only reach 150Mbps

However, the communication rate of 3G mobile communication is often as high as 1Gbps, and the use of software to process the binding of data user identity and user data cannot achieve real-time goals.

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