CN107690151B - System and method capable of sensing interference source - Google Patents
System and method capable of sensing interference source Download PDFInfo
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Abstract
The invention relates to a system and a method capable of sensing an interference source. The method comprises the following steps: controlling an access device to send a first reading request to a first terminal device; when the first terminal device receives the first reading request item, the distance information of a plurality of second terminal devices is obtained, and the distance information is sent to the access device; the access device determines a target device from the second terminal devices according to the distance information and sends a second reading request to the target device; when the target device receives the second reading request, the distance information and the state information of the target device are obtained and sent to an access device; the access device analyzes an interference source influencing signal transmission of the access device according to the acquired information, and performs noise elimination processing on the access device according to the determined interference source. The invention can automatically detect whether the signal transmitted by the access device is interfered and carry out noise elimination processing when the access device is determined to be interfered.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a system and method for sensing an interference source.
Background
Wireless signals transmitted by wireless network devices, such as Access Point (AP) devices, are often interfered, and thus transmission of the wireless signals is greatly affected. The wireless signal interference sources of the access device mainly include the interference of adjacent channels, the interference of obstacles and the interference of excessive transmission power of other wireless network devices. The conventional wireless network device cannot detect what interference the signal is interfered with after sending the signal, and therefore cannot make an adaptive adjustment according to the interference so as to improve the quality of the signal transmitted by the wireless network device.
Disclosure of Invention
In view of the foregoing, there is a need for a system and method for sensing an interference source to detect whether a signal transmitted by an access device is interfered and to control the access device to make an adaptive adjustment to improve the quality of the signal transmitted by the access device when it is determined that the access device is interfered.
A system capable of sensing interference source is applied to a network composed of an access device and a plurality of terminal devices. The access device is in communication connection with the terminal devices and is used for providing wireless access and data access services for the terminal devices. The terminal devices include a first terminal device and a plurality of second terminal devices. The system comprises: a first request module, configured to enable the access apparatus to send a first read status request signal to the first terminal apparatus; first response modeA block for enabling the first terminal device to acquire state information of the second terminal devices after receiving the first read state request signal, analyzing a plurality of distance information between the second terminal devices and the access device according to the acquired state information of the second terminal devices, establishing a sorting table according to the distance information, and sending the established sorting table to the access device; a first receiving module, configured to enable the access device to receive the sorting table sent by the first response module; a second request module, configured to enable the access device to determine a second terminal device in the sorting table as a target device according to the sorting table, and send a second read status request signal to the target device; a second response module, configured to enable the target device to obtain first distance information between the target device and the access device and state information of the target device after receiving the second read status request signal, and send the first distance information and the state information to the access device; a second receiving module, configured to enable the access device to receive the first distance information and the status information sent by the second response module; a calculating module, configured to enable the access device to apply the element a of the first matrix a according to the first distance information and the state informationmnUpdating to obtain a third matrix C, and calculating a calculation value epsilon of the third matrix C according to a first predetermined formula, wherein the first matrix A defines a corresponding relation between a signal throughput range between the access device and the second terminal devices and a distance range between the access device and the second terminal devices under the condition of no interference; an interference source determining module, configured to compare the calculation value epsilon calculated by the calculating module with a preset value k, determine whether a signal transmitted by the access device is interfered according to a comparison result, and determine an interference source of the signal transmitted by the access device; and the control module is used for enabling the access device to perform noise elimination processing on the access device in the network according to the interference source.
A method for sensing interference source is applied to a network composed of an access device and a plurality of terminal devices. The access device is in communication connection with the terminal devices and is used for the terminal devicesWireless access and data access services are provided. The terminal devices include a first terminal device and a plurality of second terminal devices. The method comprises the following steps: the access device sends a first reading state request signal to the first terminal device; the first terminal device acquires the state information of the second terminal devices after receiving the first read state request signal, analyzes a plurality of distance information between the second terminal devices and the access device according to the acquired state information of the second terminal devices, establishes a sorting table according to the distance information, and sends the established sorting table to the access device; the access device receives a sorting table sent by the first terminal device; the access device determines a second terminal device in the sorting table as a target device according to the sorting table, and sends a second reading state request signal to the target device; the target device acquires first distance information between the target device and the access device and state information of the target device after receiving the second reading state request signal, and sends the first distance information and the state information to the access device; the access device receives the first distance information and the state information sent by the target device; the access device couples the element a of the first matrix A according to the first distance information and the state informationmnUpdating to obtain a third matrix C, and calculating a calculation value epsilon of the third matrix C according to a first predetermined formula, wherein the first matrix A defines a corresponding relation between a signal throughput range between the access device and the second terminal devices and a distance range between the access device and the second terminal devices under the condition of no interference; the access device compares the calculated value epsilon with a preset value k, determines whether the signal transmitted by the access device is interfered according to the comparison result, and determines the interference source of the signal transmitted by the access device; and denoising the access device in the network according to the interference source.
The invention is simple to realize, can automatically detect whether the signal transmitted by the access device is interfered, further determines the interference source influencing the signal transmitted by the access device when the signal transmitted by the access device is determined to have interference, and carries out noise elimination processing on the access device in the network according to the determined interference source.
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Fig. 1 is a diagram of an operating environment of a system capable of sensing an interference source according to an embodiment of the present invention.
Fig. 2 is a functional block diagram of an access device according to an embodiment of the invention.
Fig. 3 is a functional block diagram of a terminal device according to an embodiment of the invention.
Fig. 4 is a functional block diagram of a system for sensing an interferer according to an embodiment of the present invention.
FIG. 5 is a diagram of a sorting table according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a first matrix a according to an embodiment of the invention.
Fig. 7 is a diagram illustrating a second matrix B according to an embodiment of the invention.
Fig. 8 is a flowchart illustrating steps of a method for sensing an interferer according to an embodiment of the present invention.
Description of the main elements
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
Referring to fig. 1, an operating environment of a system 100 capable of sensing an interference source according to an embodiment of the invention is shown. The system 100 capable of sensing an interference source is applied to a network 3 consisting of an Access Point (AP) device 1 and a plurality of terminal (STA) devices 2. In this embodiment, the network 3 formed by the access device 1 and the terminal device 2 is a wireless lan. The access device 1 may be a wireless router, and the terminal device 2 may be a smart phone, a tablet computer, a notebook computer, or the like. The access device 1 is communicatively connected to the terminal devices 2, and is configured to provide wireless access and data access services for the terminal devices 2, so that the terminal devices 2 in the network 3 access the internet 4 through the access device 1. The terminal devices 2 include a first terminal device 201 and a plurality of second terminal devices 202. The interference-aware system 100 is configured to control the access device 1 to issue a first request for reading status information to the first terminal device 201. The first terminal device 201 is any one of the terminal devices 2. When receiving the first reading status information, the first terminal device 201 obtains the location information of the second terminal devices 202 outside the first terminal device 201 and sends the location information of the second terminal devices 202 to the access device 1. The access device 1 determines a target device from the second terminal devices 202 according to the acquired location information of each second terminal device 202 and sends second read status information to the target device. The target device acquires the status information of the target device and transmits the status information to the access device 1 when receiving the second read status information. The access device 1 analyzes the interference source affecting the signal transmission of the access device 1 according to the acquired status information, and correspondingly adjusts the signal transmitted by the access device 1 according to the interference source to improve the signal transmission quality of the access device 1 and reduce or eliminate the influence of the interference source on the signal transmission of the access device 1.
Referring to fig. 2, a functional block diagram of an access device 1 according to an embodiment of the invention is shown. The access device 1 includes, but is not limited to, a communication unit 11, a storage unit 12, and a processing unit 13. The communication unit 11 is used for the access device 1 to perform communication connection with the terminal devices 2. In this embodiment, the communication unit 11 may be a Wi-Fi module. In this embodiment, the storage unit 12 stores the system 100 capable of sensing the interference source, and the system 100 capable of sensing the interference source can be invoked and executed by the processing unit 13. In other embodiments, the system 100 for perceiving the interference source is a program segment or firmware embedded in the processing unit 13. In the present embodiment, the storage unit 12 of the access device 1 further stores a first matrix a and a second matrix B (the specific contents of the first matrix a and the second matrix B will be described in detail below). In an embodiment, the storage unit 12 may be an internal storage unit of the access device 1, such as a hard disk or a memory of the access device 1. In another embodiment, the storage unit 12 may also be an external storage device of the access apparatus 1, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like equipped on the access apparatus 1. In this embodiment, the Processing Unit 13 may be a Central Processing Unit (CPU), a microprocessor or other data Processing chip.
Referring to fig. 3, a functional block diagram of the terminal device 2 according to an embodiment of the invention is shown. The terminal device 2 includes, i.e., the first terminal device 201 and the second terminal device 202 include, but are not limited to, a communication unit 21, a storage unit 22, and a control unit 23. The terminal device 2 is communicatively connected to the access device 1 via the communication unit 21. In this embodiment, the communication unit 21 is a Wi-Fi module.
Referring to fig. 4, a functional block diagram of a system 100 for sensing an interferer according to an embodiment of the present invention is shown. The interference source aware system 100 may include, but is not limited to, a first request module 101, a first response module 102, a first receiving module 103, a second request module 104, a second response module 105, a second receiving module 106, a calculating module 107, an interference source determining module 108, and a control module 109. The modules referred to herein are referred to as a series of computer program instructions capable of performing the specified functions and are more suitable than programs for describing the execution of the software. The first request module 101, the first receiving module 103, the second request module 104, the second receiving module 106, the calculating module 107, the interference source determining module 108, and the control module 109 are stored in the storage unit 12 of the access apparatus 1 and can be invoked and executed by the processing unit 13 of the access apparatus 1. The first response module 102 and the second response module 105 are stored in the storage unit 22 of the terminal device 2 and can be called and executed by the control unit 23 of the terminal device 2.
The first request module 101 is configured to enable the access device 1 to send a first read status request signal to the first terminal device 201.
The first response module 102 is configured to enable the first terminal device 201 to obtain status information of the second terminal devices 202 when receiving a first read status request signal sent by the first request module 101, analyze a plurality of distance information between the second terminal devices 202 and the access device 1 according to the obtained status information of each second terminal device 202, establish an ordering table 30 (see fig. 5) according to the distance information and according to the distance, and send the established ordering table 30 to the access device 1. In the present embodiment, the status information of the second terminal device 2 includes physical address Control (MAC) information, Received Signal Strength Indicator (RSSI) information, and/or Link Quality Indicator (LQI) information. Please refer to fig. 5, which illustrates a schematic diagram of the sorting table 30 according to an embodiment of the present invention. Each entry in the ranking table 30 is a MAC address of a second terminal device, the MAC address in the ranking table 30 is used to identify a second terminal device 202, and the second terminal devices 202 in the ranking table 30 that are closer to the access device 1 are ranked farther forward.
Specifically, after receiving the first read status request signal, the first response module 102 controls the first terminal device 201 to start a Sniffer Mode (Sniffer Mode) so that the first terminal device 201 detects MAC information, RSSI information, and/or LQI information of each of the second terminal devices 202 in the network 3. Since the closer the second terminal device 202 in the network 3 is to the access device 1, the higher the RSSI information and/or LQI information corresponding to the second terminal device 202, the first response module 102 sequences the second terminal devices 202 according to the RSSI information and/or LQI information of the second terminal devices 202 and then establishes the sequence table 30. The second terminal device 202 with higher RSSI information and/or LQI information ranks higher.
The first receiving module 103 is configured to enable the access device 1 to receive the sorting table 30 sent by the first responding module 102.
The second requesting module 104 is configured to enable the access device 1 to determine a second terminal device 202 in the sorting table 30 as a target device according to the sorting table 30 received by the first receiving module 103, and send a second read status request signal to the target device. In one embodiment, the second requesting module 104 determines the second terminal device 202 ranked most forward in the ranking table 30 as the target device according to the ranking table 30 received by the first receiving module 103, and sends a second read status request signal to the target device to read the first distance information between the target device and the access device 1 and the status information of the target device. In another embodiment, the second request module 104 determines any second terminal device 202 in the received sorting table 30 as a target device according to the received sorting table 30, and sends a second read status request signal to the determined target device to read the first distance information between the target device and the access device 1 and the status information of the target device. Of course, in other embodiments, the second request module 104 further determines any two second terminal devices 202 in the sorting table 30 as target devices according to the received sorting table 30 and sends second read status request signals to the determined target devices to read the first distance information between the target devices and the access device 1 and the status information of the target devices.
The second response module 105 is configured to enable the target device 202 to obtain first distance information between the target device and the access device 1 and status information of the target device after receiving a second read status request signal sent by the second request module 104, and send the first distance information and the status information to the access device 1.
The second receiving module 106 is configured to enable the access device 1 to receive the first distance information and the status information of the target device sent by the second responding module 105.
The calculating module 107 is configured to enable the access apparatus 1 to update elements of the first matrix a according to the received first distance information and the received state information to obtain a third matrix C), and obtain the third matrix C and the second matrix B according to a formula
And calculating to obtain a calculated value epsilon, wherein B is a second matrix, C is a third matrix, m is a row variable of the third matrix C, n is a column variable of the third matrix C, and epsilon is a calculated value to be calculated. In this embodiment, the first matrix a, the second matrix B, and the third matrix C are all square matrices of the same order. In this embodiment, the first matrix a is a predetermined initial matrix, and the first matrix a defines a correspondence relationship between a signal throughput range T between the access device 1 and the second terminal devices 202 and a distance range D between the access device 1 and the second terminal devices 202 in the network 3 without interference. In this embodiment, any element a in the first matrix AmnThe row variable m is the variation of the distance D between the access device 1 in the network 3 and a second terminal device 202 in the network 3, amnIs the variation of the throughput range T between the access device 1 in the network 3 and a second terminal device 202 in the network 3. Specifically, please refer to fig. 6, which illustrates a schematic diagram of a first matrix a according to an embodiment of the present invention. Row 1 of the first matrix a corresponds to a first distance range between the access device 1 and the second terminal device 202, row 2 corresponds to a second distance range between the access device 1 and the second terminal device 202, …, and row m corresponds to a m-th distance range between the access device 1 and the second terminal device 202; the 1 st column in the first matrix a corresponds to a first throughput range between the access device 1 and the second terminal device 202, the 2 nd column corresponds to a second throughput range between the access device 1 and the second terminal device 202, …, and the nth column corresponds to an nth throughput range between the access device 1 and the second terminal device 202. Wherein the first matrix A is an element a of 1mnThroughput between the access apparatus 1 and the second terminal apparatus 202 representing that at least one second terminal apparatus 202 in the network 3 is within the m-th distance range and the access apparatus 1 is within the m-th distance range; an element a of 0 in the first matrix AmnIndicating that none of the second terminal devices 202 of the network 3 is located at the mth distance from the access device 1The throughput between the access device 1 and the distance range is within the nth throughput range. In this embodiment, the first matrix a is a diagonal matrix with 6 rows and 6 columns:
wherein the 6 rows and 6 columns of diagonal matrix indicate that the throughput between the second terminal device 202 located in the first distance range in the network 3 and the access device 1 is in the first throughput range, the throughput between the second terminal device 202 located in the second distance range in the network 3 and the access device 1 is in the second throughput range, the throughput between the second terminal device 202 located in the third distance range in the network 3 and the access device 1 is in the third throughput range, the throughput between the second terminal device 202 located in the fourth distance range in the network 3 and the access device 1 is in the fourth throughput range, the throughput between the second terminal device 202 located in the fifth distance range in the network 3 and the access device 1 is in the fifth throughput range, and the throughput between the second terminal device 202 located in the sixth distance range in the network 3 and the access device 1 is in the sixth throughput range.
Referring to fig. 7, a schematic diagram of a first matrix a and a second matrix B according to an embodiment of the invention is shown. In this embodiment, the second matrix B is a 6-row and 6-column square matrix, and the second matrix B is
Wherein the element B of 1 in the second matrix BmnThroughput between the access apparatus 1 and the second terminal apparatus 202 representing that at least one second terminal apparatus 202 in the network 3 is within the m-th distance range and the access apparatus 1 is within the m-th distance range; element B of 0 in the second matrix BmnIndicating that none of the second terminal devices 202 in the network 3 is within the m-th range of distances from the access device 1 and that the throughput with the access device 1 is within the n-th range of throughputs.
The calculationThe module 107 changes the first matrix a according to the first distance information between the target device and the access device 1 and the state information of the target device to obtain a third matrix C. Specifically, in the present embodiment, the status information of the target device includes RSSI information, which is throughput information between the target device and the access device 1. The calculation module 107 determines the element a to be changed in the first matrix a according to the acquired first distance information of the target devicemnThe position of the row and the element a needing to be changed in the first matrix A are determined according to the RSSI informationmnThe position of the column is located, thereby determining the element a needing to be changed in the first matrix AmnAt the location of the first matrix a. Then, the calculation module 107 determines the element a in the first matrix amnSize of value, if element amn0, the element a in the first matrix AmnChange to 1 and change the element a in the first matrix A tommOr annChange to 0 if amnIf not 0, no change is required. For example, if the calculating module 107 determines that the first distance information of the target device is located in the third distance range and that the RSSI information of the target device is located in the second throughput range, the calculating module 107 determines that the element to be changed in the first matrix a is a32 The calculating module 107 further determines a of the first matrix A32A value of (a)32Is 0, then a in the first matrix A is set32Change the value of (A) from 0 to 1 and change a in the first matrix A to33From 1 to 0. In another embodiment, the status information of the target device includes RSSI information and LQI information, and the calculating module 107 calculates throughput information between the target device and the access device 1 by performing weighted accumulation on the RSSI information and the LQI information according to the obtained RSSI information and LQI information. The calculating module 107 determines the element a to be changed in the first matrix a according to the obtained first distance information and the calculated throughput informationmnThen determines the element a in the first matrix amnSize of value, if element amn0, the element a in the first matrix AmnChange to 1 and place a in the first matrix AmmElement orannChange to 0 if amnIf not 0, no change is required.
The interference source determining module 108 is configured to enable the access apparatus 1 to compare the value epsilon calculated by the calculating module 107 with a preset value k, determine whether the signal transmitted by the access apparatus 1 is interfered according to the comparison result, and determine an interference source of the signal transmitted by the access apparatus 1. Wherein the preset value k is according to the formula
And calculating, wherein A is a first matrix, B is a second matrix, m is a row variable of the first matrix A, n is a column variable of the first matrix A, and k is a preset value. If the calculated value epsilon is greater than the preset value k, the interference source determination module 108 determines that there is interference in the signal transmitted by the access device 1 in the network 3. The interference source determining module 108 further determines the interference source of the signal transmitted by the access device 1. Specifically, when the interference source determining module 108 determines that there is interference in signals transmitted between the access device 1 and the terminal device 2 in the network 3, that is, the access device 1 and the first terminal device 201 or the second terminal device 202, the WiFi channels used by all other access devices in the signal coverage of the access device 1 are acquired, the acquired channels used by other access devices are compared with the channels used by the access device 1 in the network 3, and whether the two channels are the same or not is determined, and if the two channels are the same, the interference source determining module 108 determines that the interference source affecting the signal transmission of the access device 1 in the network 3 is co-channel interference. The interference source determining module 108 further obtains the transmission power of the access device 1 in the network 3, compares the obtained transmission power of the access device 1 with a preset power, and determines that the interference source affecting the signal transmission of the access device 1 is high transmission power interference when the obtained power is determined to be greater than the preset power. Wherein the preset power is the power transmitted by the access device 1 under the condition of no interference, the preset power is related to the distance information between the target device and the access device 1 in the network 3, the smaller the distance between the target device and the access device 1 in the network 3 is, the smaller the distance is, the preset power is transmitted with the transmitting power of the access device 1The larger the compared preset power value is, the larger the distance between the target device and the access device 1 in the network 3 is, and the smaller the preset power value is compared with the transmission power of the access device 1.
When the interferer determination module 108 determines that the interferer affecting the signal transmission of the access apparatus 1 is not co-channel interference and is also not high transmit power interference, the interferer determination module 108 determines that the interferer affecting the signal transmission of the access apparatus 1 is obstacle interference.
The control module 109 is configured to enable the access device 1 to perform noise cancellation processing on the access device 1 in the network 3 according to the interference source determined by the interference source determining module 108. Specifically, when the interference determining module 106 determines that the interference source affecting the signal transmission of the access apparatus 1 is co-channel interference, the control module 109 controls the access apparatus 1 to perform channel switching to change the channel of the access apparatus 1 in the network 3 for signal transmission. When the interference source determining module 108 determines that the interference source affecting the signal transmission of the access apparatus 1 is the obstacle interference, the control module 109 performs phase adjustment on the transmission signal of the access apparatus 1. In this embodiment, the control module 109 may control the phase shift of 90 degrees or 180 degrees to the transmission signal of the access device 1 to implement the phase adjustment of the signal. When the interference source determining module 108 determines that the interference source affecting the signal transmission of the access apparatus 1 is the high transmission power interference of the access apparatus 1, the control module 109 reduces the transmission power of the access apparatus 1 to reduce or eliminate the influence of the high transmission power of the access apparatus 1 on the interference of the signal transmitted by the access apparatus 1.
Referring to fig. 8, a flowchart illustrating steps of a method for sensing an interferer according to an embodiment of the present invention is shown. The method is applied to a network 3 consisting of an access device 1 and a plurality of terminal devices 2. The terminal devices 2 include a first terminal device 201 and a plurality of second terminal devices 202. The order of the steps in the flow chart may be changed, and some steps may be omitted or combined according to different requirements. The method comprises the following steps:
s801: the access device 1 sends a first read status request signal to the first terminal device 201.
S802: the first terminal device 201 obtains the status information of the second terminal devices 2 in the network 3 when receiving the first read status request signal. In the present embodiment, the status information of the terminal device 2 includes MAC information, RSSI information, and/or LQI information.
S803: the first terminal device 201 analyzes a plurality of distance information between the second terminal devices 202 and the access device 1 according to the acquired status information of each second terminal device 202, and establishes an ordering table 30 according to the distance information and the distance.
Specifically, after receiving the first read status request signal, the first terminal device 201 controls the first terminal device 201 to start the sniff Mode (Sniffer Mode) so that the first terminal device 201 detects MAC information, RSSI information and/or LQI information of the second terminal devices 202 in the network 3. Since the closer the second terminal apparatus 202 in the network 3 is to the access apparatus 1, the higher the RSSI information and/or LQI information corresponding to the second terminal apparatus 202, the second terminal apparatus 202 sorts the second terminal apparatus 202 in the network 3 according to the obtained RSSI information and/or LQI information of the second terminal apparatus 202 in the network 3, and then establishes the sorting table 30. The second terminal device 202 with higher RSSI information and/or LQI information ranks higher.
S804: the second terminal apparatus 202 transmits the established ranking table 30 to the access apparatus 1.
S805: the access device 1 receives the transmitted sorting table 30, determines a second terminal device 202 in the sorting table 30 as the target device according to the received sorting table 30, and transmits a second read status request signal to the target device.
In one embodiment, the access device 1 determines the second terminal device 202 with the highest rank in the ranking table 30 as the target device according to the received ranking table 30, and sends the second read status request signal to the target device. In another embodiment, the second terminal device 202 determines any second terminal device 202 in the sorting table 30 as the target device according to the received sorting table 30, and sends a second read status request signal to the determined target device to read the first distance information between the target device and the access device 1 and the status information of the target device.
S806: the target device receives the second read status request signal, acquires first distance information between the target device and the access device 1 and status information of the target device, and sends the first distance information and the status information to the access device 1.
S807: the access device 1 receives the first distance information and the state information and then aligns to the element a of the first matrix amnUpdating to obtain a third matrix C, and combining the third matrix C and the second matrix B according to a formula
And calculating to obtain a calculated value epsilon, wherein B is a second matrix, C is a third matrix, m is a row variable of the third matrix C, n is a column variable of the third matrix C, and epsilon is a calculated value to be calculated. In this embodiment, the first matrix a, the second matrix B, and the third matrix C are all square matrices of the same order.
In the present embodiment, the first matrix a defines a correspondence relationship between a signal throughput range T between the access device 1 and the second terminal devices 202 and a distance range D between the access device 1 and the second terminal devices 202 in the network 3 without interference. Element a in the first matrix AmnIs the variation of the distance range D between the access device 1 and the second terminal device 202 in the network 3, amnIs the variation of the throughput range T between the access device 1 and the second terminal device 202 in the network 3. Referring to fig. 6, a schematic diagram of a first matrix a according to an embodiment of the invention is shown. Row 1 of the first matrix a corresponds to a first distance range between the access device 1 and the second terminal device 202, row 2 corresponds to a second distance range between the access device 1 and the second terminal device 202, …, and row m corresponds to a m-th distance range between the access device 1 and the second terminal device 202; the 1 st column in the first matrix A corresponds to the access device 1 and the first matrix AA first throughput range between the second terminal device 202, column 2 corresponding to a second throughput range between the access device 1 and the second terminal device 202, …, and column n corresponding to an nth throughput range between the access device 1 and the second terminal device 202. In this embodiment, the first matrix A is
Wherein the first matrix A is an element a of 1mnThroughput between the access apparatus 1 and the second terminal apparatus 202 representing that at least one second terminal apparatus 202 in the network 3 is within the m-th distance range and the access apparatus 1 is within the m-th distance range; an element a of 0 in the first matrix AmnIndicating that none of the second terminal devices 202 in the network 3 is within the m-th range of distances from the access device 1 and that the throughput with the access device 1 is within the n-th range of throughputs.
Referring to FIG. 7, a diagram of a second matrix B according to an embodiment of the present invention is shown
Wherein the element B of 1 in the second matrix BmnThroughput between the access apparatus 1 and the second terminal apparatus 202 representing that at least one second terminal apparatus 202 in the network 3 is within the m-th distance range and the access apparatus 1 is within the m-th distance range; element B of 0 in the second matrix BmnIndicating that none of the second terminal devices 202 in the network 3 is within the m-th range of distances from the access device 1 and that the throughput with the access device 1 is within the n-th range of throughputs.
S808: the access device 1 compares the calculated value with a preset value, determines whether the signal transmitted by the access device 1 is interfered according to the comparison result, and determines the interference source of the signal transmitted by the access device 1. Wherein the preset value is as followsAccording to the formula
And calculating the obtained value, wherein A is a first matrix, B is a second matrix, m is a row variable of the first matrix A, n is a column variable of the first matrix A, and k is a preset value. If the calculated value epsilon is larger than the preset value k, it is determined that interference exists in the signals transmitted by the access device 1 in the network 3. The access arrangement 1 further determines the source of interference affecting the signal transmission of the access arrangement 1.
Specifically, when it is determined that there is interference in a signal transmitted between the access device 1 and the second terminal device 202 in the network 3, first, WiFi channels used by all other access devices in the signal coverage of the access device 1 are acquired, the acquired channels used by the other access devices are compared with the channel used by the access device 1 in the network 3, and whether the two channels are the same or not is determined, and if the two channels are the same, it is determined that an interference source affecting signal transmission of the access device 1 in the network 3 is co-channel interference. Then, further acquiring the transmission power of the access device 1, comparing the acquired transmission power of the access device 1 with a preset power, and determining that an interference source affecting signal transmission of the access device 1 is high transmission power interference when the transmission power is determined to be greater than the preset power. Wherein the predetermined power is the power transmitted by the access device 1 under the condition of not being interfered. Finally, when the interference source affecting the signal transmission of the access apparatus 1 is not co-channel interference and is not high transmission power interference, it is determined that the interference source affecting the signal transmission of the access apparatus 1 is obstacle interference.
S809: and performing noise elimination processing on the access device 1 in the network 3 according to the determined interference source.
Specifically, when it is determined that the interference source affecting the signal transmission of the access apparatus 1 is co-channel interference, the access apparatus 1 performs channel switching to change the channel of the signal transmission between the access apparatus 1 and the second terminal apparatus 202. When it is determined that the interference source affecting the signal transmission of the access apparatus 1 is the obstacle interference, the access apparatus 1 performs phase adjustment on the transmitted signal. In the present embodiment, the access device 1 adjusts the phase of the transmitted signal to 90-degree or 180-degree phase shift adjustment. When it is determined that the interference source affecting the signal transmission of the access apparatus 1 is high transmission power interference of the access apparatus 1, the transmission power of the access apparatus 1 is reduced to reduce or eliminate the influence of the high transmission power of the access apparatus 1 on the interference of the signal transmitted by the access apparatus 1.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.
Claims (20)
1. A system capable of sensing an interference source, applied to a network comprising an access device and a plurality of terminal devices, wherein the access device is communicatively connected to the plurality of terminal devices and is configured to provide wireless access and data access services for the plurality of terminal devices, and the plurality of terminal devices includes a first terminal device and a plurality of second terminal devices, the system comprising:
a first request module, configured to enable the access apparatus to send a first read status request signal to the first terminal apparatus;
a first response module, configured to enable the first terminal device to obtain state information of a plurality of second terminal devices after receiving the first read state request signal, analyze a plurality of distance information between the plurality of second terminal devices and the access device according to the obtained state information of each second terminal device, establish a ranking table according to the plurality of distance information, and send the established ranking table to the access device;
a first receiving module, configured to enable the access device to receive the sorting table sent by the first response module;
a second request module, configured to enable the access device to determine a second terminal device in the sorting table as a target device according to the sorting table, and send a second read status request signal to the target device;
a second response module, configured to enable the target device to obtain first distance information between the target device and the access device and state information of the target device after receiving the second read status request signal, and send the first distance information and the state information to the access device;
a second receiving module, configured to enable the access device to receive the first distance information and the status information sent by the second response module;
a calculating module, configured to enable the access device to apply the element a of the first matrix a according to the first distance information and the status information of the target devicemnUpdating to obtain a third matrix C, and calculating a calculation value epsilon of the third matrix C according to a first predetermined formula, wherein the first matrix A defines a corresponding relation between a signal throughput range between the access device and the plurality of second terminal devices and a distance range between the access device and the plurality of second terminal devices under the condition of no interference;
an interference source determining module, configured to compare the calculation value epsilon calculated by the calculating module with a preset value k, determine whether a signal transmitted by the access device is interfered according to a comparison result, and determine an interference source of the signal transmitted by the access device; and
and the control module is used for enabling the access device to perform noise elimination processing on the access device in the network according to the interference source.
2. A system as claimed in claim 1, wherein said first predetermined formula is
Wherein, B is a second matrix, C is a third matrix, m is a row variable of the third matrix C, n is a column variable of the third matrix C, and epsilon is a calculated value to be calculated, the calculation module calculates the calculated value epsilon according to the first predetermined formula, and the first matrix a is:
the second matrix B is:
3. a system as claimed in claim 2, wherein the first matrix a has an element a of 1mnThe throughput between the second terminal device and the access device, which indicates that at least one second terminal device in the network has a distance between the second terminal device and the access device within the mth distance range and a distance between the second terminal device and the access device within the mth distance range, is within the nth throughput range, and the element a of 0 in the first matrix a ismnIndicating that no second terminal device in the network is within the mth range of distances from the access device and that the throughput with the access device is within the nth range of throughputs; element B of 1 in the second matrix BmnThroughput between the access device and at least one second terminal device in the network indicating that the second terminal device is within the mth range of distances from the access device and that the second terminal device is within the mth range of distances from the access device is within the nth range of throughput; element B of 0 in the second matrix BmnIndicating that no second terminal device in the network is within the m-th range of distances from the access device and that the throughput with the access device is within the n-th range of throughputs.
4. A system as claimed in claim 3, wherein the status information of the target device includes Received Signal Strength Indicator (RSSI) information, and wherein the calculating module determines the element a to be changed in the first matrix a according to the obtained distance information of the target devicemnThe position of the row and the element a needing to be changed in the first matrix A are determined according to the RSSI informationmnThe position of the column is located, thereby determining the element a needing to be changed in the first matrix AmnAt the position of the first matrix A, and determining the first matrixElement a in AmnSize of value, if element amn0, the element a in the first matrix AmnChange to 1 and change the element a in the first matrix A tommOr annChange to 0 if amnIf not 0, no change is required.
5. A system as claimed in claim 3, wherein said interferer determination module is responsive to a second predetermined formula
And calculating to obtain the preset value, wherein A is a first matrix, B is a second matrix, m is a row variable of the first matrix A, n is a column variable of the first matrix A, and k is the preset value.
6. A system as claimed in claim 1, wherein said interferer determination module determines that there is interference in signals transmitted by access devices in said network when said computed value e is greater than said predetermined value k.
7. A system as claimed in claim 6, wherein the interference source determining module determines that there is interference in signals transmitted between the access device and a plurality of the second terminal devices in the network, acquires WiFi channels used by all other access devices within the signal coverage of the access device, compares the acquired channels used by other access devices with the channels used by the access device in the network and determines whether the two channels are the same, and if so, determines that the interference source affecting the signal transmission of the access device is co-channel interference.
8. A system as claimed in claim 7, wherein said aggressor determination module obtains a transmit power of said access device, compares said transmit power with a predetermined power, and determines that an aggressor affecting signal transmission of said access device is high transmit power interference when said transmit power is determined to be greater than said predetermined power, wherein said predetermined power is a power transmitted by said access device without interference.
9. A system as claimed in claim 8, wherein when said interferer determination module determines that the interferer affecting the signal transmission of the access device is not co-channel interference and is not at the high transmit power, then said interferer determination module determines that the interferer affecting the signal transmission of the access device is an obstacle interference.
10. A system of perceptible interference sources as claimed in claim 9,
when the interference determining module determines that an interference source influencing signal transmission of the access device is co-channel interference, the control module controls the access device to perform channel switching so as to change a channel of the access device for signal transmission;
when the interference source determining module determines that an interference source influencing signal transmission of the access device is obstacle interference, the control module performs phase adjustment on a transmission signal of the access device; and
the control module reduces the transmission power of the access device when the interference source determination module determines that the interference source affecting the signal transmission of the access device is a high transmission power of the access device.
11. A method for sensing interference source, which is applied in a network composed of an access device and a plurality of terminal devices, wherein the access device is in communication connection with the plurality of terminal devices and is used for providing wireless access and data access services for the plurality of terminal devices, and the plurality of terminal devices include a first terminal device and a plurality of second terminal devices, the method comprising the steps of:
the access device sends a first reading state request signal to the first terminal device;
the first terminal device acquires the state information of a plurality of second terminal devices after receiving the first read state request signal, analyzes a plurality of distance information between the plurality of second terminal devices and the access device according to the acquired state information of each second terminal device, establishes a sorting table according to the plurality of distance information, and sends the established sorting table to the access device;
the access device receives a sorting table sent by the first terminal device;
the access device determines a second terminal device in the sorting table as a target device according to the sorting table, and sends a second reading state request signal to the target device;
the target device acquires first distance information between the target device and the access device and state information of the target device after receiving the second reading state request signal, and sends the first distance information and the state information to the access device;
the access device receives the first distance information and the state information sent by the target device;
the access device couples the element a of the first matrix A according to the first distance information and the state informationmnUpdating to obtain a third matrix C, and calculating a calculation value epsilon of the third matrix C according to a first predetermined formula, wherein the first matrix A defines a corresponding relation between a signal throughput range between the access device and the plurality of second terminal devices and a distance range between the access device and the plurality of second terminal devices under the condition of no interference;
the access device compares the calculated value epsilon with a preset value k, determines whether the signal transmitted by the access device is interfered according to the comparison result, and determines the interference source of the signal transmitted by the access device; and
and denoising the access device in the network according to the interference source.
12. A method as claimed in claim 11, wherein said method is practiced in the step where said access device pairs element a of first matrix a based on said first distance information and status informationmnUpdating to obtain a third matrix C, and updating the third matrix CC calculating a calculated value epsilon "according to a first predetermined formula comprises:
the first predetermined formula is
Wherein, the B is a second matrix, the C is a third matrix, m is a row variable of the third matrix C, n is a column variable of the third matrix C, and epsilon is a calculated value to be calculated, the method calculates the calculated value epsilon according to the first predetermined formula, and the first matrix a is:
the second matrix B is:
13. a method as claimed in claim 12, wherein an element a of 1 in said first matrix amnThe throughput between the second terminal device and the access device, which indicates that at least one second terminal device in the network has a distance between the second terminal device and the access device within the mth distance range and a distance between the second terminal device and the access device within the mth distance range, is within the nth throughput range, and the element a of 0 in the first matrix a ismnIndicating that no second terminal device in the network is within the mth range of distances from the access device and that the throughput with the access device is within the nth range of throughputs; element B of 1 in the second matrix BmnThroughput between the access device and at least one second terminal device in the network indicating that the second terminal device is within the mth range of distances from the access device and that the second terminal device is within the mth range of distances from the access device is within the nth range of throughput; element B of 0 in the second matrix BmnIndicating that no second terminal device in the network is within the m-th range of distances from the access device and that the throughput with the access device is within the n-th range of throughputs.
14. A method as claimed in claim 13, wherein the status information of the target device includes Received Signal Strength Indicator (RSSI) information, and wherein the method determines the element a to be changed in the first matrix a according to the obtained distance information of the target devicemnThe position of the row and the element a needing to be changed in the first matrix A are determined according to the RSSI informationmnThe position of the column is located, thereby determining the element a needing to be changed in the first matrix AmnAt the position of the first matrix A, and determining the element a in the first matrix AmnSize of value, if element amn0, the element a in the first matrix AmnChange to 1 and change the element a in the first matrix A tommOr annChange to 0 if amnIf not 0, no change is required.
15. A method as claimed in claim 13, wherein the method comprises the steps of the access device comparing the calculated value e with a predetermined value k, determining whether the signal transmitted by the access device is interfered according to the comparison result, and determining the interference source of the signal transmitted by the access device:
according to a second predetermined formula
And calculating to obtain the preset value, wherein A is a first matrix, B is a second matrix, m is a row variable of the first matrix A, n is a column variable of the first matrix A, and k is the preset value.
16. A method as claimed in claim 11, wherein the method comprises the steps of the access device comparing the calculated value e with a predetermined value k, determining whether the signal transmitted by the access device is interfered according to the comparison result, and determining the interference source of the signal transmitted by the access device:
and when the calculated value epsilon is larger than the preset value k, determining that the interference exists in the signals transmitted by the access device in the network.
17. A method as claimed in claim 16, wherein the method comprises the steps of the access device comparing the calculated value e with a predetermined value k, determining whether the signal transmitted by the access device is interfered according to the comparison result, and determining the interference source of the signal transmitted by the access device:
when it is determined that there is interference in signals transmitted between the access device and the plurality of second terminal devices in the network, WiFi channels used by all other access devices within the signal coverage of the access device are acquired, the acquired channels used by the other access devices are compared with the channels used by the access device in the network and whether the channels are the same or not is judged, and if the channels are the same, it is determined that an interference source affecting signal transmission of the access device is co-channel interference.
18. A method as claimed in claim 17, wherein the method comprises the steps of the access device comparing the calculated value e with a predetermined value k, determining whether the signal transmitted by the access device is interfered according to the comparison result, and determining the interference source of the signal transmitted by the access device:
the method comprises the steps of obtaining the transmitting power of an access device in the network, comparing the obtained transmitting power of the access device with a preset power, and determining that an interference source influencing the transmission of signals of the access device is high transmitting power interference when the obtained power is determined to be larger than the preset power, wherein the preset power is the transmitting power of the access device under the condition of not being interfered.
19. A method as claimed in claim 18, wherein the method comprises the steps of the access device comparing the calculated value e with a predetermined value k, determining whether the signal transmitted by the access device is interfered according to the comparison result, and determining the interference source of the signal transmitted by the access device:
when the interference source affecting the signal transmission of the access device is not co-channel interference and is not high transmission power interference, determining that the interference source affecting the signal transmission of the access device is obstacle interference.
20. A method for sensing an interferer according to claim 19, wherein the method includes in step "perform denoising processing on the access device based on the interferer":
when determining that an interference source influencing signal transmission of the access device is co-channel interference, performing channel switching on the access device to change a channel of the access device for signal transmission;
when the interference source influencing the signal transmission of the access device is determined to be obstacle interference, phase adjustment is carried out on the transmission signal of the access device; and
when it is determined that the interference source affecting the signal transmission of the access device is a high transmit power, then the transmit power of the access device is reduced.
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