AP device, network address conversion method and communication system

Abstract

The embodiment of the invention discloses an AP device, a network address conversion method and a communication system, relates to the technical field of communication, and aims at reducing the economic cost of a networking device in network deployment. The specific scheme is as follows: receiving a request message for accessing service corresponding to a target server sent by a terminal device by the AP device, wherein the request message comprises a source address and a destination address, the source address is an IP address of the terminal device, and the destination address is the IP address of the target server; converting the source address in the request message into a public network address of the AP device; forwarding the request message to the target server; receiving a reply message containing service response sent by the target server; converting the destination address in the reply message into the source address in the request message; and searching a wireless interface of the AP device corresponding to the terminal device in a stored mapping relation table, and sending the reply message to the terminal device through the wireless interface. The network address conversion method disclosed by the invention is applied to the AP device.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an AP device, a network address conversion method and a communication system. Background technique [0002] A traditional WLAN is composed of a wireless controller (English: Wireless Access Point Controller, AC for short), a wireless access point (English: Wireless Access Point, AP for short) and an intermediate device, among which the intermediate device can be : a switch, a router or an Intelligent Services Gateway (English: Intelligent Services Gateway, ISG for short). Specifically, refer to figure 1 The network deployment diagram is given, in which: the AP device and the AC complete the layer 2 or layer 3 communication through the local area network, and the IP address assignment (DHCP), address translation (NAT) and domain name resolution (DNS) are completed by the intermediate device or the AC. The AP device only serves as a Layer 2 bridge device for Layer 2 forward...

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Problems solved by technology

[0004] However, the inventors found that for figure 2 In the network deployment of the AC in the cloud, when deploying a small number of AP devices in a single network point, it is still necessary to deploy an ISG or router, and the cost of the router or ISG is relatively high, which makes the cost of the entire networking equipment too high and makes the product more competitive. weaken

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