How does DPI technology empower routers to achieve intelligent acceleration?

Part 01

The significance of DPI research and development for router scenarios

With the popularization of IoT technology, routers are not only basic network connection devices, but also gradually become the control managers and home firewalls of home electronic devices, transitioning from connection devices to management devices, security devices and smart devices. DPI, as a deep packet identification technology, combined with other network technologies, can realize additional functions such as app application acceleration, terminal device acceleration, green Internet access, user network behavior statistics, privacy protection, terminal protection, etc.

Figure 1 DPI application

Part 02

Introduction to DPI Technology Principle  

As we all know, ordinary message detection can extract the IP seven-tuple information (source MAC address, destination MAC address, source IP address, destination IP address, source port, destination port, transport layer protocol) in network datagrams. Ordinary message detection technology can extract it by parsing the L2-L4 layer protocol. The most commonly used packet capture tools such as wireshark or tcpdump can achieve this function. In addition to being able to identify IP seven-tuple information, DPI technology also adds the L7 layer application layer data flow identification function. Through big data technology to analyze commonly used APP and website information in advance, DPI can count the common data flow characteristics, and through such characteristics and captured network messages for intelligent comparison and shaping, DPI can perform data identification and analysis management on network data messages.

Figure 2 DPI message identification

Part 03

DPI enables intelligent acceleration of router products  

With DPI technology, users can capture network packets flowing through the network card, and then identify and analyze them. By extracting characteristic APP or device-side information and IP seven-tuple, a data flow mapping table is established. The table entries are as follows:

With this data flow mapping table, combined with Wi-Fi intelligent priority acceleration technology, the router can intelligently arrange the acceleration priority, type, and weight of network packets according to user configuration preferences, reduce the transmission delay of time-sensitive devices or application services, and enable intelligent acceleration of router products.

Part 04

in conclusion  

With the rapid development of IoT, new network technologies such as Wi-Fi are emerging one after another. This article briefly describes the significance and principle of DPI for message identification, combines DPI technology with Wi-Fi acceleration function, provides network differentiation protection capabilities for router device users, reduces key business latency, and further improves the network experience of mobile users.