Message rapid forwarding system of control and provisioning of wireless access point

Abstract

The invention provides a message rapid forwarding system of a control and provisioning of wireless access point (CAPWAP). The rapid forwarding system comprises an Ethernet switching chip, a wide area network (WAN) port, a field-programmable gate array (FPGA) unit, and a processor unit, wherein the field-programmable gate array unit is used for receiving the message from the Ethernet switching chip or the WAN port, searching a list item corresponding to a quintuple of the message from a hash table, if corresponding list item is found out, transmitting the message to the processor unit, receiving packaged message from the processor unit and transmitting the message to the Ethernet switching chip or the WAN port, and building a new list item corresponding to the quintuple of the packaged message in the hash table, if corresponding list item is found out, packaging the message according to the searched list item, and transmitting the e packaged message to the Ethernet switching chip or the WAN port, and the processor unit is used for packaging the message transmitted by the FPGA unit, and transmitting the packaged message to the FPGA unit.

Description

technical field [0001] The present application relates to wireless communication technology, and more specifically, to a system for realizing fast forwarding of Control and Configuration of Wireless Access Point (CAPWAP) messages on a Field Programmable Gate Array (FPGA). Background technique [0002] A wireless controller (AC) is a network device, the core of a wireless network, responsible for managing thin wireless access points (APs) in the wireless network. Today's wireless network coverage mostly uses one AC plus multiple APs, which is conducive to centralized management of wireless networks. The AC controls the AP through the Wireless Access Point Control and Configuration Protocol (CAPWAP). In the centralized forwarding mode, all packets of the station (STA) are encapsulated into CAPWAP packets by the AP and then forwarded by the AC after decapsulation. Currently, CAPWAP The realization of the function is mainly in the three-layer network transmission mode. All CAPW...

AI Technical Summary

Problems solved by technology

[0005] 1. The processing of short packets is not ideal;

[0006] 2. The wire-speed switching capability of CPU forwarding in the application is insufficient, especially for short messages, and the performance decline is more serious;

[0007] 3. The high-performance multi-core CPU consumes a lot of power, which requires high cooling capacity of the system;

[0008] 4. The DRAM throughput of DDR2 / 3 is limited, and multiple DRAM interfaces must be used in parallel to improve efficiency;

[0009] 5. The CPU needs to access the memory multiple times to process a message, which further deteriorates the performance

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