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A Handover Judgment Method Based on Frame Loss Rate and Received Signal Strength in IEEE 802.11 Network

An IEEE802.11, received signal strength technology, applied in the direction of network topology, wireless communication, electrical components, etc., can solve the problems of difficult selection of RSSI hysteresis value, poor effect, no switching, etc., to reduce switching times, improve experience, Avoid the effects of the ping-pong effect

Active Publication Date: 2019-05-17
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, this method does not work well in practical applications, because it is difficult to select the RSSI hysteresis value, too small a hysteresis value will still cause a ping-pong effect, and too large a hysteresis value will cause too late switching or no switching

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  • A Handover Judgment Method Based on Frame Loss Rate and Received Signal Strength in IEEE 802.11 Network
  • A Handover Judgment Method Based on Frame Loss Rate and Received Signal Strength in IEEE 802.11 Network

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0025] The invention proposes a switching judgment method based on FLR and RSSI in IEEE 802.11 network. This method is applied in MS, by constructing a neighboring access point information list (NAIL) in each MS to store FLR and RSSI information, and at a very short time interval T win This information is updated periodically. In this method, the frame loss rate (FLR) information is used as the handover trigger index. In the target AP selection stage, the method uses polynomial regression method to predict RSSI, and combines the FLR information to select the target AP for handover. Because the predicted RSSI represents the change trend of the wireless link, and the FLR information represents the current state of the wire...

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Abstract

The invention discloses a handover decision method based on a frame loss rate and received signal strength in an IEEE 802.11 network, and relates to the technical field of wireless networks. The method is applied to an MS, a neighbor access point information list (NAIL) is established in each MS to store FLR and RSSI information, and the information is periodically updated at a very short interval Twin. According to the method, the frame loss rate (FLR) is used as a handover triggering index; in a target AP selection stage, the method adopts a polynomial regression method to predict an RSSI, and selects a target AP of a handover based on the FLR information. As the predicted RSSI represents the variation trend of a wireless link, and the FLR information represents the current wireless link state, so that by using the two indexes, the method can reduce the overall handover time and invalid handover times, and effectively avoids a ping-pong effect.

Description

technical field [0001] The invention relates to the technical field of wireless networks, in particular to a switching judgment method based on frame loss rate and received signal strength in an IEEE 802.11 network. Background technique [0002] Wireless local area network (WLAN) is the product of the combination of computer network and wireless communication technology. As a typical form of wireless broadband IP access, wireless local area network supports mobile access, flexible and fast networking, low maintenance cost and expandable Such advantages make the application of WLAN more and more extensive. [0003] In recent years, with the explosive growth of mobile data traffic, more and more mobile data traffic has been offloaded from cellular networks to wireless local area networks (WLANs). In order to meet users' requirements for wireless access and offloading of mobile traffic, more and more WLAN networks are deployed. Since the coverage radius of a WLAN access point...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/08H04W36/30H04W84/12
CPCH04W36/08H04W36/30H04W84/12
Inventor 雷涛路兆铭温向明张彪曹刚朱则育
Owner BEIJING UNIV OF POSTS & TELECOMM