CN106454939A - Control method, control device and wireless local area network access point - Google Patents

Abstract

The invention discloses a control method for controlling an access point of a wireless local area network. The control method includes the following steps: controlling the light source to periodically send an identification signal, processing the feedback information of at least one user of the wireless local area network to identify the identification signal received by the user, dividing at least one user into at least one user set, and each user in each user set The identification signals of one user are the same; obtaining the interference information of one user of the user set, using the user interference information to obtain the corresponding interference information of other users of the user set to obtain the data transmission mode of the user set, and the data transmission mode Data transfer with all users of the user collection. The invention also discloses a control device and an access point of the wireless local area network. The present invention utilizes the positioning capability of visible light communication to realize the sharing of interference information among users within the irradiation range of the same light source, reduce the overhead of interference information feedback, and improve the transmission efficiency of information.

Description

Control method, control device and wireless local area network access point

technical field

The invention relates to a control method and a control device, in particular to a control method and a control device for controlling a wireless local area network access point.

Background technique

With the development of communication technology, wireless local area networks have been widely used and densely deployed. Therefore, there may be mutual interference between adjacent wireless local area networks, which affects the accuracy of data transmission. Therefore, it is necessary to obtain interference information of wireless local area networks, and due to The transmission rate of WLAN (including modulation and coding methods) is determined by the SINR of the received signal (that is, the ratio of signal power to interference and noise power). Therefore, mutual interference will affect the transmission rate of WLAN. At present, the access point of the wireless local area network needs to obtain the interference information existing in the transmission channel of each user, which leads to a large non-data transmission overhead of the wireless local area network and affects the transmission rate of the wireless local area network.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention needs to provide a control method and a control device for controlling an access point of a wireless local area network.

A control method for controlling an access point of a wireless local area network, wherein the access point includes a light source, and the control method includes the following steps:

controlling the light source to periodically send an identification signal;

processing feedback information from at least one user of the wireless local area network to identify the identification signal received by the user;

dividing the at least one user into at least one user set, and the identification signals of each of the users in each user set are the same;

acquiring interference information of one of the users in the set of users;

Obtaining interference information of other users of the corresponding user set by using the interference information of the user to obtain a data transmission mode of the user set; and

Perform data transmission with all the users in the user set by using the data transmission manner.

In some implementation manners, the users in the user set include users in a strong interference state or users in a non-strong interference state.

In some implementations, the criterion for determining the strong interference state includes that the access point does not receive the feedback information of the one user of the user set.

In some implementation manners, the interference information in the non-strong interference state includes:

Average interference power on various time scales;

Probability of occurrence of interfering signals;

The probability distribution of the interfering signal;

Transition probabilities of interfering signals between different power levels; and

The average interference power and transmitted interference power of the strong interference source near the one user of the user set.

In some implementation manners, the obtaining the interference information of other users of the corresponding user set by using the interference information of the user to obtain the data transmission method of the user set includes the following substeps:

predicting interference information of other users in the set of users by using the interference information of the one user;

sending said interference information to said other users of said set of users;

judging whether all the users in the user set are in the strong interference state;

If all the users are in the non-strong interference state, receive the data transmission mode fed back by all the users in the non-strong interference state; if all the users are in the strong interference state, suspend and communication between all said users in said strong interference state;

In some implementations, the sending the interference information to other users in the user set includes sending the interference information by using visible light of the light source.

In some embodiments, the receiving the data transmission mode fed back by all the users in the non-strong interference state includes using a wireless local area network to feed back the data transmission mode.

In some embodiments, the control method also includes the steps of:

For all the users of the user set in the non-strong interference state, it is judged whether the interference state of all the users has changed, and if the interference state of all the users has changed, return to the step to acquire the For the interference information of one user in the user set, if the interference status of all the users has not changed, return to the step to perform data transmission with all the users in the user set by using the data transmission mode.

In some embodiments, the control method also includes the steps of:

For all the users of the user set in the strong interference state, it is judged whether the strong interference state of all the users is over, and if the strong interference state of all the users is over, return to the step If all the users are in the non-strong interference state, receive the data transmission mode fed back by all the users in the non-strong interference state, and return if the strong interference state of all the users is not over In the step, if all the users are in the strong interference state, the communication with all the users in the strong interference state is suspended.

In some implementations, for the interference information fed back by the one user of the plurality of user sets, if the interference information among the plurality of user sets is different, preferentially select the interference information in the interference information. All the users in the user set with a lower probability perform data transmission.

A control device, used to control an access point of a wireless local area network, the access point includes a light source, and the control device includes a control module, a first processing module, a division module, a first acquisition module, a second acquisition module, and a transmission module. The control module is configured to control the light source to periodically send an identification signal, and the first processing module is configured to process feedback information from at least one user of the wireless local area network to identify the identification signal received by the user, so The division module is used to divide the at least one user into at least one user set, the identification signal of each user in each user set is the same, and the first acquisition module is used to acquire the user set The interference information of one of the users, the second acquiring module is configured to use the interference information of the user to acquire the interference information of other users of the corresponding user set to obtain the data transmission mode of the user set, The transmission module is configured to perform data transmission with all the users in the user set by using the data transmission mode.

In some embodiments, the second acquisition module includes a prediction module, a sending module, a first judgment module, a second processing module, and a third processing module. The predicting module is configured to use the interference information of the one user to predict the interference information of other users in the user set, and the sending module is configured to send the interference information to the other users in the user set For users, the first judging module is used to judge whether all the users in the user set are in the strong interference state, and the second processing module is used to process when all the users are in the non-strong interference state , receiving the data transmission mode fed back by all the users in the non-strong interference state, the third processing module is configured to process, when all the users are in the strong interference state, suspending and being in the strong interference state communication between all said users of the interference state.

In some embodiments, the control module further includes a second judging module. The second judging module is used to judge whether the interference state of all the users in the user set in the non-strong interference state has changed, and if the interference state of all the users has changed, return to the step to obtain Obtain the interference information of one of the users in the user set, and return to the step to perform data transmission with all the users in the user set by using the data transmission method if the interference status of all the users has not changed.

In some embodiments, the control device further includes a third judging module. The third judging module is used to judge whether the strong interference state of all the users in the user set in the strong interference state ends, and if the strong interference state of all the users ends, return to the Step: If all the users are in the non-strong interference state, then receive the data transmission mode fed back by all the users in the non-strong interference state; if the strong interference state of all the users has not ended, then Returning to the step, if all the users are in the strong interference state, suspend communication with all the users in the strong interference state.

An access point of a wireless local area network, the wireless local area network includes the control device.

In some embodiments, the access point of the wireless local area network includes a plurality of light sources.

The control method, control device, and wireless local area network access point in the embodiments of the present invention utilize the communication and positioning capability of visible light to realize the sharing of interference information among all users within the irradiation range of the same light source, reducing the cost of interference information feedback, and greatly The amplitude avoids invalid information transmission between the user and the strongly interfered user, and improves the transmission efficiency of the wireless local area network.

Description of drawings

Fig. 1 is a schematic flowchart of a control method according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of functional modules of the control device according to the embodiment of the present invention.

Fig. 3 is a working principle diagram of the embodiment of the present invention.

Fig. 4 is another schematic flow chart of the control device method according to the embodiment of the present invention.

Fig. 5 is a schematic diagram of another functional module of the control device according to the embodiment of the present invention.

Fig. 6 is a schematic diagram of another functional module of the control device according to the embodiment of the present invention.

Description of main component symbols:

Access point 100, control device 10, control module 11, first processing module 12, division module 13, first acquisition module 14, second acquisition module 15, prediction module 151, sending module 152, first judgment module 153, second The second processing module 154 , the third processing module 155 , the transmission module 16 , the third judging module 17 , and the fourth judging module 18 .

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

Referring to Fig. 1, the control method of the embodiment of the present invention is used to control the access point of the wireless local area network, and the control method includes the following steps:

S11: Control the light source to periodically send an identification signal;

S12: Process feedback information of at least one user of the wireless local area network to identify the identification signal received by the user;

S13: Divide the at least one user into at least one user set, and the identification signal of each user in each user set is the same;

S14: Obtain interference information of one user of the user set;

S15: Use the interference information of the user to obtain the interference information of other users in the corresponding user set to obtain the data transmission mode of the user set; and

S16: Perform data transmission with all the users in the user set by using the data transmission manner.

Referring to FIGS. 2 to 3 , the access point of the wireless local area network according to the embodiment of the present invention includes a control device 10 . The control method in the embodiment of the present invention can be implemented by the control device 10 in the embodiment of the present invention, and is used to control the wireless local area network access point 100 .

The control device 10 includes a control module 11 , a first processing module 12 , a division module 13 , a first acquisition module 14 , a second acquisition module 15 and a transmission module 16 . The control module 11 is used to control the light source to periodically send an identification signal, the first processing module 12 is used to process the feedback information of at least one user of the wireless local area network to identify the identification signal received by the user, and the division module 13 It is used to divide the at least one user into at least one user set, the identification signal of each user in each user set is the same, and the first acquisition module 14 is used to acquire one of the user sets. The user's interference information, the second acquiring module 15 is configured to use the user's interference information to acquire the interference information of other users in the corresponding user set to obtain the data transmission mode of the user set, and the transmission module 16 is used to Perform data transmission with all the users in the user set by using the data transmission manner.

That is to say, step S11 can be realized by the control module 11, step S12 can be realized by the first processing module 12, step S13 can be realized by the dividing module 13, step S14 can be realized by the first acquisition module 14, and step S15 can be realized by the second Second, the acquisition module 15 is implemented, and step S16 can be implemented by the transmission module 16.

The control method of the present invention uses visible light communication as a supplement to the downlink transmission of the existing wireless local area network. In the downlink direction, the data can be respectively transmitted by the wireless local area network and the visible light communication according to the scheduling, and aggregated at the access point 100 . Since the position of the light source for data transmission, that is, the LED lamp is fixed, and the user must be located near the relevant LED lamp when performing visible light communication transmission, the geographical location of the user can be obtained by judging which LED lamp the user communicates with. The channels of the wireless LAN experienced by users within the same LED lighting range are similar, so the access point only needs to obtain the interference information fed back by a certain user, and then estimate the other users within the same lighting range according to the interference information. User Interference Information. In this way, on the one hand, the frequent feedback of interference information between the access point 100 and each user in the traditional wireless communication method can be avoided, the overhead of interference information feedback can be reduced, and the efficiency of data transmission can be improved; Invalid data transmission by a user in a disturbed state. In addition, visible light communication has the characteristics of low energy consumption, green environmental protection, high transmission rate and good security. The use of visible light for auxiliary transmission of downlink communication is conducive to improving the performance of wireless local area network communication systems.

In some implementations, the users in the user set include users in a strong interference state or users in a non-strong interference state.

When the user is in a state of strong interference, due to poor channel quality, communication between the access point 100 and the user suffers from greater interference, so the access point will suspend data transmission with the user. If the user is in a non-strong interference state, the access point can implement communication with each user by using a reasonable data transmission method according to the current interference information of the user.

In some implementations, the criterion for judging the strong interference state includes that the access point does not receive feedback information from a certain user in the user set.

When the user communicates with the access point, certain communication protocols are required. In the embodiment of the present invention, the RTS/CTS protocol is used. When the access point 100 sends a request to send signal RTS to the user, if the user feeds back the clear send signal CTS to the access point 100, it indicates that the user is ready and can communicate with the access point 100. for data transfer. If the user does not feed back the clear to send signal CTS to the access point 100 , it indicates that the user is in a state of strong interference and cannot perform reliable data transmission with the access point 100 .

In some implementations, the interference information in the non-strong interference state includes the average interference power on different time scales, the probability of occurrence of interference signals, the probability distribution of interference signals, and the conversion of interference signals between different power levels probability, the average interference power and transmit interference power of the strong interference source near the one user in the user set.

When the user transmits data with the access point 100 of the wireless LAN, the interference of the channel mainly includes the following parts: the path loss caused by the type of building materials, the structure of the building, and the type of windows, etc., and the access point 100 of the wireless LAN immediately receives The thermal noise existing in the machine itself, the cascading system noise and co-frequency interference caused by the cascading of components such as antennas, amplifiers, filters, and mixers that constitute the wireless LAN receiver. The interference information obtained by the user on the channel includes the average interference power on different time scales, the probability of interference signals, the probability distribution of interference signals, etc., which helps the access point 100 to reasonably schedule the data transmission mode between users to achieve reliable data transmission.

Referring to Fig. 4, step S15 in the control method of the embodiment of the present invention includes the following sub-steps:

Step S151: Using the interference information of the one user to predict the interference information of other users in the user set;

Step S152: sending the interference information to other users in the user set;

Step S153: judging whether all the users in the user set are in the strong interference state;

Step S154: If all the users are in the non-strong interference state, receive the data transmission mode fed back by all the users in the non-strong interference state;

Step S155: If all the users are in the strong interference state, suspend communication with all the users in the strong interference state;

Please refer to FIG. 5 , in some implementations, the second acquiring module 15 includes a predicting module 151 , a sending module 152 , a first judging module 153 , a second processing module 154 , and a third processing module 155 . The prediction module 151 is configured to use the interference information of the one user to predict the interference information of other users in the user set, and the sending module 152 is configured to send the interference information to other users in the user set, The first judging module 153 is used to judge whether all the users in the user set are in the strong interference state, and the second processing module 154 is used to process when all the users are in the non-strong interference state, the receiver is in the The data transmission mode fed back by all the users in the non-strong interference state, the third processing module 155 is used to process when all the users are in the strong interference state, suspend and all the users in the strong interference state communication between users.

That is to say, step S151 can be realized by the prediction module 151, step S152 can be realized by the sending module 152, step S153 can be realized by the first judging module 153, step S154 can be realized by the first processing module S154, and step S155 can be realized by the second Three processing modules 155 are implemented.

If all the users in the user set have the same identification signal, it means that all the users in the user set are within the irradiation range of the same light source, and the geographic locations of all the users in the user set are similar. The interference information of the channel used for data transmission between the access points 100 is similar, then when the access point obtains the interference information fed back by a certain user in the associated user set, it can use the fed back interference information to estimate the interference information in the user set. Interference information from other users. When the users in the user set are in a strong interference state, the access point 100 needs to suspend the communication with the user set due to the poor channel quality; if the users in the user set are in a non-strong interference state, the access point 100 The data transmission may be performed according to the data transmission mode fed back by the users in the user collection. In this way, on the one hand, invalid data transmission between the access point 100 and users in a strong interference state can be avoided; Reduce the overhead of wireless LAN non-data transmission and improve the transmission efficiency of wireless LAN.

In some embodiments, sending the interference information to other users in the set of users includes sending the interference information using visible light of a light source.

Visible light communication has the characteristics of low energy consumption, green environmental protection, high transmission rate and good security. Using visible light to transmit interference information is conducive to improving the performance of wireless local area network communication systems.

In some embodiments, receiving the data transmission mode fed back by all users in the non-strong interference state includes using a wireless local area network to feed back the data transmission mode.

In the uplink transmission direction, since the user cannot provide a light source with sufficient brightness for data transmission using visible light, the user needs to use the wireless local area network to feedback the data transmission method.

Please refer to Fig. 4 again, the control method of the embodiment of the present invention also includes steps:

S17: For all the users of the user set in the non-strong interference state, determine whether the interference state of all the users has changed; if the interference state of all the users has changed, return to step S14 to acquire If the interference information of one user in the user set does not change, return to step S16 to perform data transmission with all the users in the user set by using the data transmission mode.

Referring to FIG. 6 , the control device 10 further includes a second judging module 17 . The second judging module 17 is used to judge whether the interference state of all the users in the user set in the non-strong interference state has changed, and if the interference state of all the users has changed, return to the step Obtain the interference information of one of the users in the user set, if the interference status of all the users has not changed, return to the step and use the data transmission method to perform data transmission with all the users in the user set .

That is to say, step S17 can be implemented by the second judging module 17 .

In this way, when the interference state of the users in the user set changes, the interference information should be updated in time and the new interference information should be fed back to the access point 100, and the access point 100 can obtain the interference information of other users in the user set according to the new interference information, And use reasonable data transmission methods to communicate according to the interference information, so as to ensure the accuracy of data transmission.

Please refer to Fig. 4 again, the control method of the embodiment of the present invention also includes steps:

S18: For all the users of the user set in the strong interference state, determine whether the strong interference state of all the users ends, and if the strong interference state of all the users ends, return to the In the above step, if all the users are in the non-strong interference state, then receive the data transmission mode fed back by all the users in the non-strong interference state, if the strong interference state of all the users has not ended, Then return to the step and if all the users are in the strong interference state, suspend the communication with all the users in the strong interference state.

Please refer to FIG. 6 again, the control device 10 includes a third judging module 18 . The third judging module 18 is used to judge whether the strong interference state of all the users in the user set in the strong interference state is over, and if the strong interference state of all the users is over, return to step S154 If all the users are in the non-strong interference state, receive the data transmission mode fed back by all the users in the non-strong interference state, and if the strong interference state of all the users has not ended, then Returning to step S155, if all the users are in the strong interference state, suspend the communication with all the users in the strong interference state.

That is to say, step S18 can be implemented by the third judging module 18 .

In this way, when the strong interference state of all users in the user set in the strong interference state ends, the users in the user set can timely feed back the available data transmission mode to the access point 100, thereby realizing communication with the access point 100 communication.

Please refer to FIG. 3 again, the access point of the wireless local area network according to the embodiment of the present invention includes multiple light sources.

There may be multiple light sources within the radiated range of an access point of a wireless local area network. Multiple light sources constitute a user set. The interference information of one user in the user set corresponding to each light source is used to obtain the interference information of other users in the user set, which greatly reduces the feedback overhead of non-data transmission.

In some implementations, for the interference information fed back by the one user of the plurality of user sets, if the interference information among the plurality of user sets is different, preferentially select the interference information in the interference information. All the users in the user set with a lower probability perform data transmission.

Since the quality of the channel with a lower interference probability in the interference information is better, the correctness of data transmission can be ensured by preferentially selecting a user set with a lower interference probability in the interference information for communication.

In the description of this specification, reference to the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific examples" or "some examples" etc. Specific features, structures, materials, or features described in an embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Any process or method descriptions in flowcharts or otherwise described herein may be understood to represent modules, segments or portions of code comprising one or more executable instructions for implementing specific logical functions or steps of the process , and the scope of preferred embodiments of the invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including substantially concurrently or in reverse order depending on the functions involved, which shall It is understood by those skilled in the art to which the embodiments of the present invention pertain.

Each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may physically exist separately, or two or more units may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules.

Although the embodiment of the present invention has been shown and described above, it can be understood that the above embodiment is exemplary and should not be construed as a limitation of the present invention, and those skilled in the art can make the above-mentioned Implementing implements changes, modifications, substitutions and variations.

Claims (16)

1. A control method, for controlling an access point of a wireless local area network, characterized in that, the access point comprises a light source, and the control method comprises the following steps: controlling the light source to periodically send an identification signal; processing feedback information from at least one user of the wireless local area network to identify the identification signal received by the user; dividing the at least one user into at least one user set, and the identification signals of each of the users in each user set are the same; acquiring interference information of one of the users in the set of users; Obtaining interference information of other users of the corresponding user set by using the interference information of the user to obtain a data transmission mode of the user set; and Perform data transmission with all the users in the user set by using the data transmission manner. 2. The control method according to claim 1, wherein the users in the user set include users in a strong interference state or users in a non-strong interference state. 3 . The control method according to claim 2 , wherein the criterion for judging the strong interference state includes that the access point has not received the feedback information of the one user of the user set. 4 . 4. The control method according to claim 2, wherein the interference information in the non-strong interference state comprises: Average interference power on various time scales; Probability of occurrence of interfering signals; The probability distribution of the interfering signal; Transition probabilities of interfering signals between different power levels; and The average interference power and transmitted interference power of the strong interference source near the one user of the user set. 5. The control method according to claim 1, wherein the interference information of other users in the corresponding user set is obtained by using the interference information of the user to obtain the data transmission mode of the user set Include the following sub-steps: predicting interference information of other users in the set of users by using the interference information of the one user; sending said interference information to said other users of said set of users; judging whether all the users in the user set are in the strong interference state; If all the users are in the non-strong interference state, receive the data transmission mode fed back by all the users in the non-strong interference state; If all the users are in the strong interference state, suspend communication with all the users in the strong interference state. 6 . The control method according to claim 5 , wherein the sending the interference information to other users in the user set comprises sending the interference information by using visible light of the light source. 7. The control method according to claim 5, wherein the receiving the data transmission mode fed back by all the users in the non-strong interference state comprises using a wireless local area network to feed back the data transmission mode. 8. control method as claimed in claim 1 is characterized in that, described control method also comprises the step: For all the users of the user set in the non-strong interference state, it is judged whether the interference state of all the users has changed, and if the interference state of all the users has changed, return to the step to acquire the For the interference information of one user in the user set, if the interference status of all the users has not changed, return to the step to perform data transmission with all the users in the user set by using the data transmission mode. 9. control method as claimed in claim 1 is characterized in that, described control method also comprises the step: For all the users of the user set in the strong interference state, it is judged whether the strong interference state of all the users is over, and if the strong interference state of all the users is over, return to the step If all the users are in the non-strong interference state, receive the data transmission mode fed back by all the users in the non-strong interference state, and return if the strong interference state of all the users is not over In the step, if all the users are in the strong interference state, the communication with all the users in the strong interference state is suspended. 10. The control method according to claim 1, characterized in that, for the interference information fed back by the user of the multiple user sets, if the interference information between the multiple user sets is different, then All the users in the user set with a lower interference probability in the interference information are preferentially selected for data transmission. 11. A control device for controlling an access point of a wireless local area network, wherein the access point includes a light source, and the control device includes: a control module, the control module is used to control the light source to periodically send an identification signal; A first processing module, configured to process feedback information of at least one user of the wireless local area network to identify the identification signal received by the user; A dividing module, the dividing module is used to divide the at least one user into at least one user set, and the identification signals of each of the users in each user set are the same; A first acquisition module, the first acquisition module acquires the interference information of one user of the user set; A second obtaining module, the second obtaining module uses the interference information of the user to obtain the interference information of other users of the corresponding user set to obtain the data transmission mode of the user set; and A transmission module, configured to use the data transmission mode to perform data transmission with all the users in the user set. 12. The control device according to claim 11, wherein the second acquiring module comprises: a prediction module, configured to use the interference information of one of the users to predict the interference information of other users in the set of users; A sending module, configured to send the interference information to other users in the user set; A first judging module, the first judging module is used to judge whether all the users in the user set are in the strong interference state; A second processing module, the second processing module is configured to process the data transmission mode for receiving feedback from all the users in the non-strong interference state when all the users are in the non-strong interference state; A third processing module, the third processing module is configured to process, when all the users are in the strong interference state, suspend communication with all the users in the strong interference state. 13. The control device according to claim 1, further comprising: A second judging module, the second judging module is used to judge whether the interference status of all the users in the user set in the non-strong interference state changes, and if the interference status of all the users changes, then Return to the step to obtain the interference information of one of the users in the user set, and if the interference status of all the users has not changed, return to the step to use the data transmission method and all the users in the user set User data transfer. 14. The control device according to claim 1, further comprising: A third judging module, the third judging module is used to judge whether the strong interference state of all the users in the user set in the strong interference state ends, if the strong interference state of all the users ends , then return to the step if all the users are in the non-strong interference state, then receive the data transmission mode fed back by all the users in the non-strong interference state, if the strong interference of all the users If the state is not over, return to the step. If all the users are in the strong interference state, suspend communication with all the users in the strong interference state. 15. An access point of a wireless local area network, characterized in that the access point of the wireless local area network comprises the control device according to any one of claims 11-14. 16. The wireless local area network access point according to claim 15, wherein the wireless local area network access point comprises a plurality of light sources.