Wireless local area network access controller supporting 802.11e and Diffserv

Abstract

The invention discloses a wireless local area network access controller (AC) supporting 802.11e and Diffserv. The butt joint of the 802.11e and the Diffserv is achieved in the AC so that an end-to-end QoS between a wireless user and a destination site accessing to the Internet is provided according to the following steps that: the user logs on and queries QoS parameters thereof through the AC, and the wireless user uploads data to an AP according to the data service type and a 802.11e specification; the AP uploads the received data and priority information thereof to the AC through a 802.1D / Q; the AC marks and dispatches the received data according to a Diffserv specification and uploads data to the destination site through the Internet; the AC transmits the priority information and the data of a Diffserv data packet received from the Internet to the AP together through the 802.1D / Q; the priority level of a non Diffserv data packet received from the Internet by the AC can be determined by the AC according to the service characteristic classification; the AP downloads data to the wireless user according to the 802.11e specification; and the priority level of the data packets exceeding the QoS limited amount of the user is lowered forcibly until the data packets are deleted.

Description

technical field [0001] The invention relates to wireless local area network technology, in particular to access controller and QoS technology of wireless local area network. Background technique [0002] Wireless Local Area Network (WLAN) is currently one of the most promising broadband Internet access methods. The wireless local area network can be connected to the Internet in the following ways: Figure 1 In the two-layer structure shown, wireless users are connected to a wireless LAN access point (AP) through a wireless LAN, and multiple APs can connect to the same access controller (AC) through a wired LAN (Ethernet), and connect to Access to the Internet and exchange data with destination sites on the Internet such as Web servers. AC is responsible for user authentication, billing, access control, and centralized management of the network, while the functions of AP are only simplified, providing only the connection between wireless and wired networks, and the cost is a...

AI Technical Summary

Problems solved by technology

The traditional 802.11 standard does not support QoS. Although the AC can allocate and limit user bandwidth to achieve limited QoS, multimedia broadband services on the Internet, such as VoIP, AOD, VOD, etc. Parameters such as jitter, delay, and error rate have different requirements. When the number of users is large and the data traffic is large, it will seriously affect its QoS

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