INTERFERENCE DETECTING DEVICE AND METHOD FOR DETECTING INTERFERENCE FOR WIRELESS COMMUNICATION
First Claim
1. A method for detecting interference for a wireless communication comprising the steps of:
- A) increasing a time count until a preset interference detection determination time if a signal is received by a wireless communication device;
B) during the interference detection determination time,b1) comparing an RSSI(Received Signal Strength Indication) value of the received signal with a preset RSSI threshold value;
b2) if the RSSI value of the received signal is larger than the RSSI threshold value, detecting its own packet signal from the received signal in order to discriminate a data signal from an interference signal;
b3) if said its own packet signal is detected in the step of b2), determining whether a gain of the received signal is reduced or not;
b4) if the gain is reduced in the step of b3), determining whether quality of the received signal is deteriorated or not;
b5) if the quality of the received signal is deteriorated in the step of b4), testing symbols of the received signal; and
b6) if the number of the same symbols is less than a preset threshold value in the step of b5), increasing an interference packet count;
C) comparing a preset interference packet count threshold value with the interference packet count after the interference detection determination time; and
D) if the interference packet count is larger than the interference packet count threshold value, determining the signal as the interference signal.
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Accused Products
Abstract
The present invention relates to a method for detecting interference and an interference detecting device for a wireless communication capable of improving detection accuracy of an interference signal in a wireless communication device without influencing network operation while the interference signal is detected; and, more particularly, to a method for detecting interference and an interference detecting device for a wireless communication to determine an interference signal by increasing an interference packet count according to an RSSI value, its own packet detection, gain reduction, deterioration of signal quality, the number of the same symbols, and so on and comparing an increased interference packet count value with a threshold value by using each ZigBee device as a main constituent of interference detection unlike a conventional method for detecting interference in which a ZigBee coordinator or a ZigBee router is a main constituent of interference detection.
30 Citations
20 Claims
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1. A method for detecting interference for a wireless communication comprising the steps of:
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A) increasing a time count until a preset interference detection determination time if a signal is received by a wireless communication device; B) during the interference detection determination time, b1) comparing an RSSI(Received Signal Strength Indication) value of the received signal with a preset RSSI threshold value; b2) if the RSSI value of the received signal is larger than the RSSI threshold value, detecting its own packet signal from the received signal in order to discriminate a data signal from an interference signal; b3) if said its own packet signal is detected in the step of b2), determining whether a gain of the received signal is reduced or not; b4) if the gain is reduced in the step of b3), determining whether quality of the received signal is deteriorated or not; b5) if the quality of the received signal is deteriorated in the step of b4), testing symbols of the received signal; and b6) if the number of the same symbols is less than a preset threshold value in the step of b5), increasing an interference packet count; C) comparing a preset interference packet count threshold value with the interference packet count after the interference detection determination time; and D) if the interference packet count is larger than the interference packet count threshold value, determining the signal as the interference signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An interference detecting device for a wireless communication comprising:
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an RSSI(Received Signal Strength Indication) testing unit for comparing an RSSI value of a signal received by a wireless communication device with a preset RSSI threshold value; a time count unit for counting a time and comparing a time count value with a preset time threshold value; and an interference generation testing unit for counting an interference packet and comparing an interference packet count value after a preset period with a preset interference packet threshold value, wherein the RSSI testing unit resets a time count if the RSSI value of the received signal is smaller than the RSSI threshold value and operates the time count unit in order to increase the time count value if the RSSI value of the received signal is larger than the RSSI threshold value, the time count unit operates the interference generation testing unit in order to increase the interference packet count value if the time count value is larger than the time threshold value, and the interference generation testing unit determines that the interference is generated if the interference packet count value is larger than the interference packet threshold value. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification