CN107969026B - Method for realizing wireless screen projection in wireless local area network and wireless controller AC - Google Patents

Method for realizing wireless screen projection in wireless local area network and wireless controller AC Download PDF

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Publication number
CN107969026B
CN107969026B CN201711284804.9A CN201711284804A CN107969026B CN 107969026 B CN107969026 B CN 107969026B CN 201711284804 A CN201711284804 A CN 201711284804A CN 107969026 B CN107969026 B CN 107969026B
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wireless terminal
wireless
around
access point
screen projection
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CN107969026A (en
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黄增安
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Ruijie Networks Co Ltd
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Ruijie Networks Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/16Discovering, processing access restriction or access information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/20Selecting an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10Small scale networks; Flat hierarchical networks
    • H04W84/12WLAN [Wireless Local Area Networks]

Abstract

The embodiment of the invention provides a method for realizing wireless screen projection in a wireless local area network and a wireless controller, wherein the method comprises the following steps: acquiring a first maximum signal strength; establishing a first corresponding relation between the first wireless terminal and a corresponding first AP according to the first maximum signal strength; acquiring a second maximum signal strength; establishing a second corresponding relation between the first screen projection equipment and a corresponding second AP according to a second maximum signal intensity; determining a third corresponding relation between the first wireless terminal and the first screen projection equipment according to the first corresponding relation and the second corresponding relation; and when the first wireless terminal initiates a screen projection service request, sending first screen projection equipment information corresponding to the first wireless terminal to the AP associated with the first wireless terminal according to the third corresponding relation. The wireless screen projection technology can be applied to a wireless network environment with a certain scale.

Description

Method for realizing wireless screen projection in wireless local area network and wireless controller AC
Technical Field
The invention relates to the field of data communication, in particular to a method for realizing wireless screen projection in a wireless local area network and a wireless controller AC.
Background
In short, the content in the device is shared with other devices through a certain transmission protocol by the video and audio signal, for example, a picture displayed by a mobile phone can be wirelessly projected on a large-screen television. There are three major prior art technologies, DLNA, AirPlay, Miracast, which have relatively large differences in functional application, but have common place in the connection establishment concept before the devices, and the technology herein implements what mainly surrounds the connection establishment between the devices, and thus is described herein with respect to AirPlay.
Bonjour is a protocol name of a computer, equipment and service on an IP network in an AirPlay automatically discovering lan, and sets a network standard based on the openness zero of a multicast domain name service (multicast DNS), and a working process of Bonjour mainly includes: announcement and query:
announcing: any device supporting the provision of services is required to notify the information of the own devices in the whole network, such as an IP address, a port, a service type, whether password authentication exists or not, and the like. Such as advertising that it provides file transfer protocol FTP service, the IP address is 192.168.1.101 and the port is 21.
And (3) inquiring: and inquiring whether the whole network has the service which the network wants or has some services which can be accessed by the network, inquiring whether conflicts exist in the network, and inquiring the IP address of the target host. For example, a B host accesses the network and needs to find an FTP server in the local area network. Finally, the B host is informed of obtaining an A host with the IP address of 192.168.1.101 and the port number of 21, namely the A host provides the FTP service, so that the B host knows the IP address and the port number of the A host. Bonjour-enabled devices need to listen to packets and refresh the list in real time.
However, in a network with a certain scale, there may be a problem that, for example, in a conference room, in a hotel room, when a screen-casting service is desired to be used, since a large number of optional devices exist in a local area network, there may be a problem that, for example, a mobile phone may mistakenly establish a connection with a television in a partition, and thus the service may not be available.
To solve the above problems, the prior art provides the following two solutions:
the first scheme is as follows: and by combining an isolation mechanism of the switch, Bonjour protocols in different rooms are not intercommunicated, so that isolation is realized, and when the user terminal is connected with the wireless fidelity Wi-Fi in the room, only screen projection equipment in the room can be found. The disadvantages of this solution are: Wi-Fi usually provides the same network service by many wireless access point AP apparatuses at the same time, can't guarantee the user terminal misconnection next door signal, thus can't use the service of this room at any time, there is a scheme on this basis, different AP apparatuses provide the network of different names separately, such as 301 room Wi-Fi network name 301, this kind of scheme is very difficult to be suitable for in the scene that personnel's mobility is big, manage and maintain the work very difficult too, roam and have the problem too.
Scheme II: some manufacturers supporting screen projection equipment enable televisions to emit specially named Wi-Fi signals, so that user terminals select specific equipment to connect and use unique screen projection services, only the unique equipment can be found when the specified Wi-Fi is connected, different network switching is required once the users leave a room and change a conference room, the operation is very complicated, and meanwhile, when the number of the Wi-Fi signals is too large, unified management and control cannot be performed, so that poor wireless experience and wireless potential safety hazards are prone to occurring.
In conclusion, the above schemes may have the problems of tedious use, misoperation of the user, service error and the like.
Disclosure of Invention
In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:
a method for realizing wireless screen projection in a wireless local area network comprises the following steps:
acquiring first maximum signal strength between a first wireless terminal in a wireless local area network and wireless Access Points (APs) around the first wireless terminal; establishing a first corresponding relation between the first wireless terminal and a corresponding first AP according to the first maximum signal strength;
acquiring second maximum signal strength between first screen projection equipment in a wireless local area network and wireless Access Points (APs) around the first screen projection equipment; establishing a second corresponding relation between the first screen projection equipment and a corresponding second AP according to a second maximum signal intensity;
determining a third corresponding relation between the first wireless terminal and the first screen projection equipment according to the first corresponding relation and the second corresponding relation;
when the first wireless terminal initiates a screen projection service request, first screen projection equipment information corresponding to the first wireless terminal is sent to an AP associated with the first wireless terminal according to the third corresponding relation, so that the first wireless terminal establishes connection with the first screen projection equipment according to the first screen projection equipment information.
Optionally, the step of determining the third corresponding relationship between the first wireless terminal and the first screen projection device according to the first corresponding relationship and the second corresponding relationship specifically includes:
and when the identification of the first AP in the first corresponding relationship is the same as the identification of the second AP in the second corresponding relationship, the first wireless terminal in the first corresponding relationship is corresponding to the first screen projection equipment in the second corresponding relationship to establish a third corresponding relationship.
Optionally, the step of obtaining a first maximum signal strength between a first wireless terminal in the wireless local area network to which the first wireless terminal belongs and each wireless access point AP around the first wireless terminal specifically includes:
when the first wireless terminal sends a detection request to each wireless access point AP around the first wireless terminal, and the time for each wireless access point AP around the first wireless terminal to receive the detection request is determined not to exceed a threshold value, first maximum signal strength between the first wireless terminal and each wireless access point AP around the first wireless terminal in the wireless local area network is obtained.
Optionally, when the first wireless terminal sends a probe request to each wireless access point around the first wireless terminal, and it is determined that a time for each wireless access point around the first wireless terminal to receive the probe request does not exceed a threshold, the step of obtaining a first maximum signal strength between the first wireless terminal in the wireless local area network and each wireless access point AP around the first wireless terminal specifically includes:
when the first wireless terminal sends a detection request to each wireless access point around the first wireless terminal, and it is determined that the time for each wireless access point around the first wireless terminal to receive the detection request does not exceed a first threshold and the discrimination between the signal strengths of each wireless access point AP around the first wireless terminal when receiving the detection request is greater than a second threshold, a first maximum signal strength between the first wireless terminal in the wireless local area network to which the first wireless terminal belongs and the wireless access points AP around the first wireless terminal is obtained.
Optionally, the step of obtaining a first maximum signal strength between a first wireless terminal in the wireless local area network to which the first wireless terminal belongs and each wireless access point AP around the first wireless terminal specifically includes:
when the first wireless terminal sends a detection request to wireless access points around the first wireless terminal, when it is determined that the time for receiving the detection request by each wireless access point around the first wireless terminal exceeds a first threshold or the degree of distinction between the signal strengths when each wireless access point AP around the first wireless terminal receives the detection request is less than a second threshold, each wireless access point around the first wireless terminal is instructed to initiate n times of active detection to the first wireless terminal according to the degree of distinction between the signal strengths, and first maximum signal strength between the first wireless terminal in the n times of active detection and each wireless access point AP around the first wireless terminal is obtained, wherein n is a natural number greater than or equal to 1.
In another aspect of the embodiments of the present invention, there is also provided a wireless access controller AC for implementing wireless screen projection in a wireless local area network, including:
a first obtaining module, configured to obtain a first maximum signal strength between a first wireless terminal in a wireless local area network to which the first wireless terminal belongs and each wireless access point AP around the first wireless terminal;
a first establishing module, configured to establish a first correspondence between the first wireless terminal and a corresponding first AP according to a first maximum signal strength;
the second acquisition module is used for acquiring second maximum signal strength between first screen projection equipment in the wireless local area network and each wireless access point AP around the first screen projection equipment;
a second establishing module, configured to establish a second corresponding relationship between the first screen projection device and a corresponding second AP according to a second maximum signal strength;
a determining module, configured to determine a third corresponding relationship between the first wireless terminal and the first screen projection device according to the first corresponding relationship and the second corresponding relationship;
and the sending module is used for sending first screen projection equipment information corresponding to the first wireless terminal to the AP associated with the first wireless terminal according to the third corresponding relation when the first wireless terminal initiates a screen projection service request, so that the first wireless terminal establishes connection with the first screen projection equipment according to the first screen projection equipment information.
Optionally, the determining module is specifically configured to:
and when the identification of the first AP in the first corresponding relationship is the same as the identification of the second AP in the second corresponding relationship, the first wireless terminal in the first corresponding relationship is corresponding to the first screen projection equipment in the second corresponding relationship to establish a third corresponding relationship.
Optionally, the first obtaining module is specifically configured to:
when the first wireless terminal sends a detection request to each wireless access point AP around the first wireless terminal, and the time for each wireless access point AP around the first wireless terminal to receive the detection request is determined not to exceed a threshold value, first maximum signal strength between the first wireless terminal and each wireless access point AP around the first wireless terminal in the wireless local area network is obtained.
Optionally, when the first obtaining module is specifically configured to:
when the first wireless terminal sends a detection request to each wireless access point around the first wireless terminal, and it is determined that the time for each wireless access point around the first wireless terminal to receive the detection request does not exceed a first threshold and the discrimination between the signal strengths of each wireless access point AP around the first wireless terminal when receiving the detection request is greater than a second threshold, a first maximum signal strength between the first wireless terminal in the wireless local area network to which the first wireless terminal belongs and the wireless access points AP around the first wireless terminal is obtained.
Optionally, the first obtaining module is specifically configured to:
when the first wireless terminal sends a detection request to wireless access points around the first wireless terminal, when it is determined that the time for receiving the detection request by each wireless access point around the first wireless terminal exceeds a first threshold or the degree of distinction between the signal strengths when each wireless access point AP around the first wireless terminal receives the detection request is less than a second threshold, each wireless access point around the first wireless terminal is instructed to initiate n times of active detection to the first wireless terminal according to the degree of distinction between the signal strengths, and first maximum signal strength between the first wireless terminal in the n times of active detection and each wireless access point AP around the first wireless terminal is obtained, wherein n is a natural number greater than or equal to 1.
The embodiment of the invention has the beneficial effects that: the wireless screen projection technology can be applied to a wireless network environment with a certain scale; and the overhead of active detection is reduced as much as possible through intelligent judgment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a system configuration according to an embodiment of the present invention;
fig. 3 is a diagram illustrating an apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a method for implementing wireless screen projection in a wireless local area network, as shown in fig. 1, including:
s101, acquiring a first maximum signal strength between a first wireless terminal in a wireless local area network and each wireless Access Point (AP) around the first wireless terminal;
in an embodiment a of the present invention, as shown in fig. 2, it is assumed that three wireless access points, namely AP1, AP2, and AP3, are located around the first wireless terminal a, and the first wireless terminal a performs signal interaction with the three wireless access points respectively, during the interaction, three signal strengths between the first wireless terminal a and the three wireless access points respectively may be obtained, and a maximum one of the three signal strengths may be selected as a first maximum signal strength.
S103, establishing a first corresponding relation between the first wireless terminal and a corresponding first AP according to the first maximum signal intensity;
in embodiment a of the present invention, when the first maximum signal strength is the signal strength between the wireless terminal a and the corresponding AP3, the corresponding relationship between the first wireless terminal a and the AP3 is established as the first corresponding relationship.
S105, acquiring second maximum signal intensity between a first screen projection device in the wireless local area network and each wireless access point AP around the first screen projection device;
in an embodiment a of the present invention, it is assumed that three wireless access points, namely AP1, AP2, and AP3, are located around the first screen projection device a, and the first screen projection device a performs signal interaction with the three wireless access points respectively, during the interaction, three signal strengths between the first screen projection device a and the three wireless access points respectively may be obtained, and a maximum one of the three signal strengths is selected as a second maximum signal strength.
S107, establishing a second corresponding relation between the first screen projection equipment and a corresponding second AP according to a second maximum signal intensity;
in embodiment a of the present invention, when the second maximum signal strength is the signal strength between the first screen projecting device a and the corresponding AP3, the corresponding relationship between the first screen projecting device a and the AP3 is established as the second corresponding relationship.
S109, determining a third corresponding relation between the first wireless terminal and the first screen projection equipment according to the first corresponding relation and the second corresponding relation;
and S111, when the first wireless terminal initiates a screen projection service request, sending first screen projection equipment information corresponding to the first wireless terminal to an AP associated with the first wireless terminal according to the third corresponding relation, so that the first wireless terminal establishes connection with the first screen projection equipment according to the first screen projection equipment information.
Optionally, step S109 specifically includes:
and when the identification of the first AP in the first corresponding relationship is the same as the identification of the second AP in the second corresponding relationship, the first wireless terminal in the first corresponding relationship is corresponding to the first screen projection equipment in the second corresponding relationship to establish a third corresponding relationship.
In an embodiment a of the present invention, assuming that the first corresponding relationship includes an identifier of AP3, and the second corresponding relationship also includes an identifier of AP3, the wireless terminal a in the first corresponding relationship and the screen projection device a in the second corresponding relationship are associated with each other, and a third corresponding relationship is established.
Optionally, step S101 specifically includes:
when the first wireless terminal sends a detection request to each wireless access point AP around the first wireless terminal, and the time for each wireless access point AP around the first wireless terminal to receive the detection request is determined not to exceed a threshold value, first maximum signal strength between the first wireless terminal and each wireless access point AP around the first wireless terminal in the wireless local area network is obtained.
Optionally, when the first wireless terminal sends a probe request to each wireless access point around the first wireless terminal, and it is determined that a time for each wireless access point around the first wireless terminal to receive the probe request does not exceed a threshold, the step of obtaining a first maximum signal strength between the first wireless terminal in the wireless local area network and each wireless access point AP around the first wireless terminal specifically includes:
when the first wireless terminal sends a detection request to each wireless access point around the first wireless terminal, and it is determined that the time for each wireless access point around the first wireless terminal to receive the detection request does not exceed a first threshold and the discrimination between the signal strengths of each wireless access point AP around the first wireless terminal when receiving the detection request is greater than a second threshold, a first maximum signal strength between the first wireless terminal in the wireless local area network to which the first wireless terminal belongs and the wireless access points AP around the first wireless terminal is obtained.
Optionally, step S101 specifically includes:
when the first wireless terminal sends a detection request to wireless access points around the first wireless terminal, when it is determined that the time for receiving the detection request by each wireless access point around the first wireless terminal exceeds a first threshold or the degree of distinction between the signal strengths when each wireless access point AP around the first wireless terminal receives the detection request is less than a second threshold, each wireless access point around the first wireless terminal is instructed to initiate n times of active detection to the first wireless terminal according to the degree of distinction between the signal strengths, and first maximum signal strength between the first wireless terminal in the n times of active detection and each wireless access point AP around the first wireless terminal is obtained, wherein n is a natural number greater than or equal to 1.
The determination of the discrimination can be performed by sorting the received terminal signal strengths of all APs, determining the highest and next highest signal difference values, considering that the discrimination is high when the difference value is greater than a set threshold, considering that the discrimination is low when the difference value is less than the set threshold, and initiating active detection to the first wireless terminal for n times when the discrimination is low.
In the embodiment of the present invention, there may be two methods for initiating active probing:
firstly, when the terminal supports the 802.11K protocol, an 802.11K detection message is initiated to acquire signal strength information between different APs and the terminal.
And secondly, when the terminal does not support the 802.11K protocol, controlling the adjacent AP of the terminal to initiate a detection message to the terminal according to the access condition of the terminal, and analyzing the signal strength of the response message of the terminal.
In another aspect of the embodiments of the present invention, there is also provided a wireless access controller AC for implementing wireless screen projection in a wireless local area network, as shown in fig. 3, including:
a first obtaining module 201, configured to obtain a first maximum signal strength between a first wireless terminal in a wireless local area network to which the first wireless terminal belongs and each wireless access point AP around the first wireless terminal;
a first establishing module 203, configured to establish a first corresponding relationship between the first wireless terminal and a corresponding first AP according to a first maximum signal strength;
a second obtaining module 205, configured to obtain a second maximum signal strength between a first screen projection device in the wireless local area network and each wireless access point AP around the first screen projection device;
a second establishing module 207, configured to establish a second corresponding relationship between the first screen projection device and a corresponding second AP according to a second maximum signal strength;
a determining module 209, configured to determine a third corresponding relationship between the first wireless terminal and the first screen projection device according to the first corresponding relationship and the second corresponding relationship;
a sending module 211, configured to send, when the first wireless terminal initiates a screen projection service request, first screen projection device information corresponding to the first wireless terminal to an AP associated with the first wireless terminal according to the third corresponding relationship, so that the first wireless terminal establishes a connection with the first screen projection device according to the first screen projection device information.
Optionally, the determining module 209 is specifically configured to:
and when the identification of the first AP in the first corresponding relationship is the same as the identification of the second AP in the second corresponding relationship, the first wireless terminal in the first corresponding relationship is corresponding to the first screen projection equipment in the second corresponding relationship to establish a third corresponding relationship.
Optionally, the first obtaining module 201 is specifically configured to:
when the first wireless terminal sends a detection request to each wireless access point AP around the first wireless terminal, and the time for each wireless access point AP around the first wireless terminal to receive the detection request is determined not to exceed a threshold value, first maximum signal strength between the first wireless terminal and each wireless access point AP around the first wireless terminal in the wireless local area network is obtained.
Optionally, when the first obtaining module 201 is specifically configured to:
when the first wireless terminal sends a detection request to each wireless access point around the first wireless terminal, and it is determined that the time for each wireless access point around the first wireless terminal to receive the detection request does not exceed a first threshold and the discrimination between the signal strengths of each wireless access point AP around the first wireless terminal when receiving the detection request is greater than a second threshold, a first maximum signal strength between the first wireless terminal in the wireless local area network to which the first wireless terminal belongs and the wireless access points AP around the first wireless terminal is obtained.
Optionally, the first obtaining module 201 is specifically configured to:
when the first wireless terminal sends a detection request to wireless access points around the first wireless terminal, when it is determined that the time for receiving the detection request by each wireless access point around the first wireless terminal exceeds a first threshold or the degree of distinction between the signal strengths when each wireless access point AP around the first wireless terminal receives the detection request is less than a second threshold, each wireless access point around the first wireless terminal is instructed to initiate n times of active detection to the first wireless terminal according to the degree of distinction between the signal strengths, and first maximum signal strength between the first wireless terminal in the n times of active detection and each wireless access point AP around the first wireless terminal is obtained, wherein n is a natural number greater than or equal to 1.
The determination of the discrimination can be performed by sorting the received terminal signal strengths of all APs, determining the highest and next highest signal difference values, considering that the discrimination is high when the difference value is greater than a set threshold, considering that the discrimination is low when the difference value is less than the set threshold, and initiating active detection to the first wireless terminal for n times when the discrimination is low.
The embodiment of the invention has the beneficial effects that: the wireless screen projection technology can be applied to a wireless network environment with a certain scale; and the overhead of active detection is reduced as much as possible through intelligent judgment.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (8)

1. A method for realizing wireless screen projection in a wireless local area network is characterized by comprising the following steps:
acquiring first maximum signal strength between a first wireless terminal in a wireless local area network and wireless Access Points (APs) around the first wireless terminal; establishing a first corresponding relation between the first wireless terminal and a corresponding first AP according to the first maximum signal strength;
acquiring second maximum signal strength between first screen projection equipment in a wireless local area network and wireless Access Points (APs) around the first screen projection equipment; establishing a second corresponding relation between the first screen projection equipment and a corresponding second AP according to a second maximum signal intensity;
determining a third corresponding relation between the first wireless terminal and the first screen projection equipment according to the first corresponding relation and the second corresponding relation;
when the first wireless terminal initiates a screen projection service request, sending first screen projection equipment information corresponding to the first wireless terminal to an AP (access point) associated with the first wireless terminal according to the third corresponding relation so that the first wireless terminal establishes connection with the first screen projection equipment according to the first screen projection equipment information;
the step of determining a third corresponding relationship between the first wireless terminal and the first screen projection device according to the first corresponding relationship and the second corresponding relationship specifically includes:
and when the identification of the first AP in the first corresponding relationship is the same as the identification of the second AP in the second corresponding relationship, the first wireless terminal in the first corresponding relationship is corresponding to the first screen projection equipment in the second corresponding relationship to establish a third corresponding relationship.
2. The method of claim 1, wherein the step of obtaining the first maximum signal strength between the first wireless terminal in the wireless local area network and the wireless access points AP around the first wireless terminal comprises:
when the first wireless terminal sends a detection request to each wireless access point AP around the first wireless terminal, and the time for each wireless access point AP around the first wireless terminal to receive the detection request is determined not to exceed a threshold value, first maximum signal strength between the first wireless terminal and each wireless access point AP around the first wireless terminal in the wireless local area network is obtained.
3. The method according to claim 2, wherein when the first wireless terminal sends a probe request to each wireless access point around the first wireless terminal, and it is determined that the time for each wireless access point around the first wireless terminal to receive the probe request does not exceed a threshold, the step of obtaining the first maximum signal strength between the first wireless terminal in the wireless local area network and each wireless access point AP around the first wireless terminal specifically comprises:
when the first wireless terminal sends a detection request to each wireless access point around the first wireless terminal, and it is determined that the time for each wireless access point around the first wireless terminal to receive the detection request does not exceed a first threshold and the discrimination between the signal strengths of each wireless access point AP around the first wireless terminal when receiving the detection request is greater than a second threshold, a first maximum signal strength between the first wireless terminal in the wireless local area network to which the first wireless terminal belongs and the wireless access points AP around the first wireless terminal is obtained.
4. The method of claim 1, wherein the step of obtaining the first maximum signal strength between the first wireless terminal in the wireless local area network and the wireless access points AP around the first wireless terminal comprises:
when the first wireless terminal sends a detection request to wireless access points around the first wireless terminal, when it is determined that the time for receiving the detection request by each wireless access point around the first wireless terminal exceeds a first threshold or the degree of distinction between the signal strengths when each wireless access point AP around the first wireless terminal receives the detection request is less than a second threshold, each wireless access point around the first wireless terminal is instructed to initiate n times of active detection to the first wireless terminal according to the degree of distinction between the signal strengths, and first maximum signal strength between the first wireless terminal in the n times of active detection and each wireless access point AP around the first wireless terminal is obtained, wherein n is a natural number greater than or equal to 1.
5. A wireless access controller, AC, for implementing wireless screen projection in a wireless local area network, comprising:
a first obtaining module, configured to obtain a first maximum signal strength between a first wireless terminal in a wireless local area network to which the first wireless terminal belongs and each wireless access point AP around the first wireless terminal;
a first establishing module, configured to establish a first correspondence between the first wireless terminal and a corresponding first AP according to a first maximum signal strength;
the second acquisition module is used for acquiring second maximum signal strength between first screen projection equipment in the wireless local area network and each wireless access point AP around the first screen projection equipment;
a second establishing module, configured to establish a second corresponding relationship between the first screen projection device and a corresponding second AP according to a second maximum signal strength;
a determining module, configured to determine a third corresponding relationship between the first wireless terminal and the first screen projection device according to the first corresponding relationship and the second corresponding relationship;
a sending module, configured to send, when the first wireless terminal initiates a screen projection service request, first screen projection device information corresponding to the first wireless terminal to an AP associated with the first wireless terminal according to the third correspondence, so that the first wireless terminal establishes a connection with the first screen projection device according to the first screen projection device information;
wherein the determining module is specifically configured to:
and when the identification of the first AP in the first corresponding relationship is the same as the identification of the second AP in the second corresponding relationship, the first wireless terminal in the first corresponding relationship is corresponding to the first screen projection equipment in the second corresponding relationship to establish a third corresponding relationship.
6. The AC of claim 5, wherein the first acquisition module is specifically configured to:
when the first wireless terminal sends a detection request to each wireless access point AP around the first wireless terminal, and the time for each wireless access point AP around the first wireless terminal to receive the detection request is determined not to exceed a threshold value, first maximum signal strength between the first wireless terminal and each wireless access point AP around the first wireless terminal in the wireless local area network is obtained.
7. The AC of claim 6, wherein the first obtaining module is specifically configured to:
when the first wireless terminal sends a detection request to each wireless access point around the first wireless terminal, and it is determined that the time for each wireless access point around the first wireless terminal to receive the detection request does not exceed a first threshold and the discrimination between the signal strengths of each wireless access point AP around the first wireless terminal when receiving the detection request is greater than a second threshold, a first maximum signal strength between the first wireless terminal in the wireless local area network to which the first wireless terminal belongs and the wireless access points AP around the first wireless terminal is obtained.
8. The AC of claim 5, wherein the first obtaining module is specifically configured to:
when the first wireless terminal sends a detection request to wireless access points around the first wireless terminal, when it is determined that the time for receiving the detection request by each wireless access point around the first wireless terminal exceeds a first threshold or the degree of distinction between the signal strengths when each wireless access point AP around the first wireless terminal receives the detection request is less than a second threshold, each wireless access point around the first wireless terminal is instructed to initiate n times of active detection to the first wireless terminal according to the degree of distinction between the signal strengths, and first maximum signal strength between the first wireless terminal in the n times of active detection and each wireless access point AP around the first wireless terminal is obtained, wherein n is a natural number greater than or equal to 1.
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