Patent ID: 9686700
Date: 2017-06-20
CPC Classifications: H04L,H04W

Claim:
1. A method for identifying interference, applied to a wireless communications network that comprises a wireless management device and at least two access point devices, the method comprising: sending a channel switch request message that comprises a specified channel to each access point device, to instruct the at least two access point devices to switch to the specified channel; receiving a channel switch response message from each access point device; determining, based on received channel switch response messages from the at least two access point devices, one of the at least two access point device as a master access point device, and every other access point device except the master access point device as a slave access point device; sending a spectrum scan request message to the master access point device, requesting the master access point device to send to each slave access point device, a spectrum scan request message that comprises information about a scan start time, such that each access point device starts spectrum scanning according to the scan start time and collects spectrum information of an interference source; receiving, from each of the at least two access point devices, collected spectrum information of the interference source; determining that the spectrum information collected by the at least two access point devices comprises spectrum information of interference sources that belong to a same device type; separately extracting, from the spectrum information collected by the at least two access point devices, the spectrum information of the interference sources that belong to the same device type; matching characteristic sequences that are in a same time period and in the separately extracted spectrum information of the interference sources that belong to the same device type; calculating an overlapping characteristic match value of the characteristic sequences in the same time period; determining whether the overlapping characteristic match value is greater than a preset threshold; determining that the separately extracted spectrum information of the interference sources that belong to the same device type is from a same interference source when the overlapping characteristic match value is greater than the preset threshold; and determining that the separately extracted spectrum information of the interference sources that belong to the same device type is from different interference sources when the overlapping characteristic match value is not greater than the preset threshold.