Method for reliable broadcasting in wireless local area network
A wireless local area network, reliable technology, applied in the field of digital communication, can solve irrelevant problems, can not fully utilize the data rate and the number of users, etc., to achieve the effect of reliable broadcasting and good business prospects
Active Publication Date: 2012-10-10
TSINGHUA UNIV
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Judging from the existing literature, the work on wireless LAN broadcasting, such as the Chinese patent application number 200910079048.5, is essentially a carousel based on unicast. Benefits independent of number of users
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[0026] The method for reliable broadcasting in the wireless local area network proposed by the present invention, the wireless local area network includes a wireless access point and a mobile station, and the wireless access point packs the original data to be broadcast into an original data packet group composed of fixed-length data packets , and each of the original data packet groups is broadcast to the mobile station with the following steps:
[0027] (1-1) If the wireless access point broadcasts for the first time after starting up, then set the broadcast transmission link rate, if it is a normal broadcast, then proceed to step (1-2);
[0028] (1-2) The wireless access point selects the channel coding mode, performs channel coding on the original data packet group, obtains the initial coded data packet group, and broadcasts the initial coded data packet group to the mobile station in the form of a broadcast message;
[0029] (1-3) The mobile station receives the above-men...
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The invention relates to a method for reliable broadcasting in a wireless local area network, and belongs to the technical field of digital communication. The method comprises the following steps that: a wireless access point packs original data to be broadcasted into an original data packet, selects a channel encoding mode, performs channel encoding on the original data packet and broadcasts theencoded data packet to a mobile station in the form of broadcast message; the mobile station receives the encoded data packet, performs channel decoding on the encoded data packet and feeds back channel decoding state information to the wireless access point; the wireless access point receives the information and adjusts the rate of the broadcast transmission link; and if all the mobile stations decode the original data packet, the broadcasting of the current original data packet is finished; otherwise, a supplementary encode data packet is generated and broadcasted to the mobile station; andthe mobile station receives the supplementary encode data packet, performs the channel decoding on the supplementary encode data packet and transmits the channel decoding state information until the channel decoding of the mobile station is finished. The wireless local area network system of the method of the invention has the function of reliable broadcasting and is widely applied to informationbroadcast in vehicles, public information broadcast of governments and commercial organizations, building escape information broadcast and the like.
Description
technical field [0001] The invention relates to a method for reliable broadcasting in a wireless local area network, which belongs to the technical field of digital communication. Background technique [0002] WLAN is a packet transmission wireless network that meets IEEE 802.11 series standards, and its main application scenarios are offices, homes, campuses, and commercial hotspots. Wireless local area network has the characteristics of no wiring, low radiation, large communication bandwidth, simple installation, etc., and has been widely used in recent years. [0003] A wireless local area network is composed of a wireless access point (Access point, AP) and a mobile station (Station, STA). The wireless access point is the central node of the entire wireless LAN, controlling the operation of the entire network, and the mobile station is a general device in the network. A wireless access point is also called a wireless router because it usually has a built-in routing fun...
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IPC IPC(8): H04W4/06H04W84/12H04L1/00
Inventor 陆建华陈曦万韵恒
Owner TSINGHUA UNIV