Energy-saving wireless local area network (WLAN) all-channel shielding method

Abstract

The invention relates to an energy-saving wireless local area network (WLAN) all-channel shielding method, and belongs to the technical field of wireless security. The method comprises the following steps of: starting a shielding device to scan channels of the WLAN, and recording the maximum value of a received signal strength indicator (RSSI) on each working channel; calculating the wireless propagation loss (PL) from the shielding device end to the communication equipment end with the maximum RSSI on each channel; determining the minimum transmitting power Yi,j at which the shielding deviceworking on an i channel makes the throughput of a j channel reduced to zero; finding out the maximum value of Yi,j when the shielding device works in different channels and finding out the minimum value Yk, wherein the corresponding channel k is the optimal working channel of the shielding device; and setting the working channel of the shielding device as k, and transmitting a shielding signal atYk power. By the method, all channels can be interfered at the same time, the channel throughput is reduced at the same time, the problem that an interference signal cannot be transmitted when the original channel throughput is raised and skipped due to channel skip is solved, and interference efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless security, and in particular relates to a wireless local area network data communication shielding mechanism, which transmits a shielding signal with a certain power through detection and analysis of each channel, so as to reduce the throughput of channel data and achieve a shielding effect. Background technique [0002] In today's domestic and international exchanges, WLAN has become an indispensable communication platform for the government, military, public security, diplomacy, and confidential scientific research. It is of great significance to carry out technical security monitoring and protection of wireless local area networks in important secret-related places, such as meeting rooms, research and development rooms, financial rooms, planning, command and monitoring places. [0003] The IEEE 802.11b wireless local area network uses 11 channels with a frequency of 2.412-2.462GHz, and wireless...

AI Technical Summary

Problems solved by technology

jammers respectively at T 1 , T 2 , T 3 Slot jump to channel C 1 、C 2 、C 3 For co-channel interference, the jammer can only interfere with one channel in one time slot, and the jammer cannot transmit shielding signals for several milliseconds when the channel jumps, which makes the interference efficiency low. Use this method for shielding , the throughput of the channel can only be reduced to two-thirds of the original (3 working channels)

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