CN102547910A - Method for selecting wireless access point and wireless access point - Google Patents
Method for selecting wireless access point and wireless access point Download PDFInfo
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Abstract
The invention provides a method for selecting a wireless access point and the wireless access point. The method comprises the following steps that: a master control access point (AP) selects candidate APs according to a terminal access signal intensity threshold value and a preset threshold value of the master control AP and other APs; the master control AP acquires information of a terminal and the candidate APs, and performs assignment on an attribute array according to the acquired information, wherein the attribute array comprises signal intensity between the candidate APs and the terminal, the access capabilities of the candidate APs, a channel utilization rate and a signal-to-interference ratio; the master control AP calculates the weight coefficient vector of the attribute array, and calculates recommended values of the candidate APs according to the weight coefficient vector and the attribute array; and the master control AP sequences the candidate APs according to the recommended values of the candidate APs and provides a sequencing result for the terminal, so that the terminal can select an AP according to the sequencing result. By the technical scheme, the AP is selected on the basis of a plurality of attributes, so that the terminal can successfully access a network and participate in normal services according to the selected AP.
Description
Technical Field
The present invention relates to wireless communication technologies, and in particular, to a wireless access point selection method and a wireless access point.
Background
The wireless local area network is a computer network using wireless channel as transmission medium, and can make users realize random broadband network access at any time and place. In a wireless lan, a terminal, such as a Personal Computer (PC) or other portable device, searches for an available wireless Access Point (AP) by transmitting a radio signal, and establishes a wireless connection with a corresponding AP when it searches for a radio signal of a considerable strength, thereby enabling access to the network through the AP.
The terminal accesses according to the signal strength of the AP, the signal strength only indicates that the AP can be connected, but when the capacity of the AP selected by the terminal according to the signal strength of the AP is full, the user is enough, the flow is large enough, no redundant bandwidth is allocated to the terminal, or when the signal quality is poor due to serious channel interference of the AP, the terminal can only access the AP, but cannot really develop the service. Therefore, the method for selecting the AP by the terminal based on the signal strength cannot guarantee that the terminal can successfully access the network.
Disclosure of Invention
The invention provides a wireless access point selection method and a wireless access point, which are used for enabling a terminal to successfully access a network according to a selected access AP and developing normal services.
One aspect of the present invention provides a method for selecting a wireless access point, including:
the method comprises the steps that a master control AP selects candidate APs from a master control AP and other APs according to the signal intensity from the master control AP to a terminal, the acquired signal intensity from the other APs to the terminal and a preset signal intensity threshold;
the master control AP collects information of the terminal and the candidate AP, and assigns values to the attribute array corresponding to the candidate AP according to the collected information; the AP attributes in the attribute array include: signal strength between the candidate AP and the terminal, access capability of the candidate AP, channel utilization rate and signal-to-interference ratio;
the master control AP calculates a weight coefficient vector of an attribute array of the candidate AP, and calculates a recommended value of the candidate AP according to the weight coefficient vector and the attribute array;
and the master control AP sequences the candidate APs according to the recommended values of the candidate APs and provides sequencing results for the terminal so that the terminal can select to access the APs according to the sequencing results.
Another aspect of the present invention provides a wireless access point, including:
a candidate selection module, configured to select a candidate AP from the AP and the other APs according to the signal strength from the AP to the terminal, the acquired signal strength from the other APs to the terminal, and a preset signal strength threshold;
an attribute array processing module, configured to collect information about a terminal and the candidate AP, and assign a value to an attribute array corresponding to the candidate AP according to the collected information, where an AP attribute in the attribute array includes: signal strength between the candidate AP and the terminal, access capability of the candidate AP, channel utilization rate and signal-to-interference ratio;
a recommended value obtaining module, configured to calculate a weight coefficient vector of an attribute array of the candidate AP, and calculate a recommended value of the candidate AP according to the weight coefficient vector and the attribute array;
and the sequencing processing module is used for sequencing the candidate APs according to the recommended values of the candidate APs and providing sequencing results to the terminal so that the terminal can select the access APs according to the sequencing results.
According to the wireless access point selection method provided by the invention, the master control AP selects the candidate AP from the candidate APs according to the signal strengths from all the APs to the terminal and the preset signal strength threshold value, then sorts the candidate APs according to the multiple attributes of the candidate APs and the corresponding weight coefficients, and provides the sorting result for the terminal, so that the terminal selects the access AP according to the sorting result.
According to the wireless access point provided by the invention, the candidate APs are selected from the signal strengths from all the APs to the terminal and the preset signal strength threshold value, then the candidate APs are ranked according to the multiple attributes of the candidate APs and the corresponding weight coefficients, and the ranking result is provided for the terminal, so that the terminal selects the access APs according to the ranking result.
Drawings
Fig. 1 is a flowchart of an AP selection method according to an embodiment of the present invention;
fig. 2 is a flowchart of an AP selection method according to another embodiment of the present invention;
fig. 3 is a flowchart of an AP selection method according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of an AP according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an AP according to another embodiment of the present invention.
Detailed Description
Fig. 1 is a flowchart of an AP selection method according to an embodiment of the present invention. As shown in fig. 1, the AP selection method of this embodiment includes:
and step 101, selecting candidate APs from the main control AP and other APs by the main control AP according to the signal intensity from the main control AP to the terminal, the acquired signal intensity from other APs to the terminal and a preset signal intensity threshold value.
The master AP in this embodiment may be elected by all APs according to a preset election mechanism, or may be configured in advance by an administrator. In this embodiment, the master AP is mainly responsible for collecting various information of all APs (including the master AP itself) and terminals in the entire network, and performing relevant processing according to the collected various information.
For example, when the master AP is elected through the election mechanism, each AP in the network may elect the master AP through an interactive message. For example, each AP in the network sends an election packet to each other, and the election packet carries an election identifier (e.g., priority), so that each AP elects a master AP according to the election packet. For example, one way to select a master AP according to priority is: all the APs agree in advance that the AP with the highest election priority is the master AP. For an AP, if the priority of the AP is higher than the priorities carried in all the received election messages, the AP determines that the AP is a master control AP; if the AP finds that there is a higher priority than the AP itself among the priorities carried in all the received election messages, the AP may determine that it is not the master AP.
Another example is: each AP in the network sends an election message to each other, the election message comprises the current residual capacity of each AP, and each AP selects an AP with a lighter load as a master control AP, so that the influence of the assignment, calculation and other operations of the master control AP on candidate APs on the capability of the terminal for accessing the master control AP is avoided.
For example, when the master AP is configured by the administrator, the administrator may configure a certain AP as the master AP and configure the information of the master AP on other APs.
No matter whether the master AP is determined by using the election method or the configuration method, after the master AP is determined, the master AP may collect information of other APs, for example, signal strengths from the other APs to the terminal, and the like.
In addition, a signal strength threshold is also preset on the master control AP for judging the access performance of each AP.
Based on the above, the master control AP compares the signal strength from the master control AP to the terminal and the acquired signal strength from other APs to the terminal with the preset signal strength threshold respectively, and acquires the AP from which the signal strength of the terminal is greater than the signal strength threshold as the candidate AP.
If the signal strength from the master AP to the terminal is greater than the signal strength threshold, the master AP will also select itself as a candidate AP.
A preliminary screening of all APs is achieved by step 101.
In this embodiment, the selected candidate APs include at least one AP.
And 102, the master control AP collects information of the terminal and the candidate APs and assigns values to the attribute arrays corresponding to the candidate APs according to the collected information.
In order to solve the problem that in the prior art, a terminal selects an AP according to signal strength, which cannot access a network, and cannot normally perform a service, the embodiment is based on multiple attributes of the AP at the same time, and is no longer based on signal strength. Therefore, in this embodiment, the master AP previously screens a plurality of attributes that can represent the AP performance, selects a main attribute that can represent the current AP performance most from the attributes, and constructs an attribute array for the candidate AP. The main attributes (i.e., the attributes of the APs in the attribute array) selected by the master AP to be most representative of the performance of the current AP include: signal strength between the candidate AP and the terminal, access capability of the candidate AP, channel utilization ratio and signal-to-interference ratio between the candidate AP and the terminal, and the like. The access capability of a candidate AP can be represented by the difference between the total capacity of the candidate AP and the capacity occupied by all terminals currently accessing the AP. Wherein, the capacity mainly refers to bandwidth resources. The channel utilization between a candidate AP and a terminal may be represented by the ratio of the channel utilization of a channel between the candidate AP and the terminal to the sum of the channel utilization of all channels between the candidate AP and the terminal. Each candidate may have multiple channels, each channel may have different channel utilization, and there may be interference between channels. In the embodiment, the channel utilization rate between the candidate AP and the terminal is defined by the ratio of the utilization rate of one channel of the candidate AP to the sum of the utilization rates of all channels, and the utilization rate of a single channel and the interference degree between the channels are fully considered, so that the terminal can select a channel with a higher utilization rate and less interference with other channels from a plurality of channels of the candidate AP for access. Signal-to-interference ratio refers to the ratio of signal to the sum of interference and noise.
It should be noted that the AP attributes included in the attribute array of this embodiment are not limited to the above, and may include more attributes capable of embodying the AP performance.
And the master AP collects the information of the terminal and all candidate APs based on the attribute array. For example, the master AP gathers the signal strength from each candidate AP to the terminal; the master control AP collects the total capacity of each candidate AP and the capacity of the AP consumed by all terminals currently accessed to the candidate AP so as to obtain the access capacity of each candidate AP; the master control AP acquires the channel utilization rate, the signal interference ratio and the like between the candidate AP and the terminal.
When the attribute array includes more AP attributes, the master AP also needs to gather information about the more AP attributes.
And then, the master control AP carries out assignment operation on the attribute array according to the collected information. Specifically, the master AP assigns values to each AP attribute in the attribute array corresponding to each candidate AP. For example, assuming that the master AP selects m candidate APs and the selected AP attributes are n, the attribute array corresponding to all candidate APs is:
wherein y isijJ-th genus representing i-th candidate APWherein i is more than or equal to 1 and less than or equal to m; j is more than or equal to 1 and less than or equal to n.
It is assumed that the various information collected by the master AP corresponding to the attribute array is as follows:
wherein x isijA value representing information corresponding to the jth attribute of the ith candidate AP. The assignment operation of the master AP to the attribute array according to the collected information means assigning x to xijAssign y toijWherein i is from 1 to m and j is from 1 to n.
Because the influence degrees of different AP attributes of each candidate AP on the AP selected by the terminal to be accessed are different, the main control AP reflects the influence degrees of different AP attributes by configuring different weight coefficients for the different AP attributes of each candidate AP. Therefore, the weight coefficient of different AP attributes of each candidate AP is an important factor that affects the terminal to select an access AP, and therefore, after the master AP assigns a value to the attribute array, a weight coefficient vector corresponding to the attribute array needs to be calculated, that is, the weight coefficients of different AP attributes in the attribute array are calculated.
Since the influence degree of each AP attribute is not a very certain element, the master AP of the present embodiment performs weight determination using a fuzzy matrix. Specifically, the master control AP constructs a fuzzy complementary judgment matrix according to five scales or nine scales; then, a weight coefficient vector is calculated by using a weight calculation method (for example, a minimum variance method) of fuzzy complementary judgment matrix sorting. For example, assume that the constructed fuzzy complementary judging matrix H and the calculated weight coefficient vector W are respectively as follows:
wherein,
a weighting factor representing the jth attribute of each candidate AP.
Then, the master control AP multiplies the AP attribute value of each candidate AP by the weight coefficient in the weight system vector, and adds the multiplication results to obtain the recommended value of the candidate AP. For example: the recommended value of the ith candidate AP is:
and step 104, the master control AP sorts the candidate APs according to the recommended values of the candidate APs, and provides the sorting result for the terminal to select the access APs according to the sorting result.
After the recommended value of each candidate AP is calculated, the master control AP sorts the candidate APs according to the sequence of the recommended values from small to large or from large to small, and provides the sorting result for the terminal. For example: let m be 4, i.e. there are 4 candidate APs, and the result of sorting according to the recommended value from small to large is the first AP, the second AP, the third AP and the fourth AP. When the master AP obtains the sequencing result: after the first AP, the second AP, the third AP and the fourth AP are provided to the terminal, the terminal may know that the comprehensive performance of the fourth AP is optimal among the current 4 candidate APs, and then the third AP, the second AP and finally the first AP are provided. The terminal would then select an access AP based thereon.
Under normal conditions, the terminal selects a candidate AP with the optimal comprehensive performance as an access AP.
In this embodiment, the master AP first compares the signal strength from each AP to the terminal with a preset signal strength threshold, selects a candidate AP from all APs, sorts the candidate APs according to a plurality of attributes of the candidate APs and corresponding weight coefficients, and provides the sorted result to the terminal, so that the terminal selects an access AP according to the sorted result.
Fig. 2 is a flowchart of an AP selection method according to another embodiment of the present invention. As shown in fig. 2, the AP selection method of this embodiment includes:
Step 201 and step 202 can be referred to the description of step 101 and step 102.
And step 203, the master control AP standardizes the assigned attribute array according to a preset standard value of the AP attribute in the attribute array.
The units and values of the attributes of the APs in the attribute array are not uniform, and the attribute array needs to be standardized. In the normalization process, since it is necessary to previously set a standard value of each AP attribute, the standard value of each AP attribute is previously set in the present embodiment. For example, for the signal strength from the terminal to the candidate AP, the manufacturer may define the signal strength when the terminal cannot search for the signal of the candidate AP as its standard value. Assuming that yj is a standard value of the jth AP attribute, the formula for normalizing the jth AP attribute of each candidate AP is as follows:
wherein i is more than or equal to 1 and less than or equal to m; j is more than or equal to 1 and less than or equal to n.
The attribute matrix after normalization is:
and step 204, the master control AP calculates a weight coefficient vector of the attribute array of the candidate AP after the normalization processing, and calculates a recommended value of the candidate AP according to the weight coefficient vector and the attribute array after the normalization processing.
In this embodiment, the master AP calculates the recommended values of the candidate APs using the attribute array after the normalization process. For a specific calculation process, please refer to the description of step 103.
And step 205, the master control AP ranks the candidate APs according to the recommended values of the candidate APs and provides the ranked results to the terminal, so that the terminal can select an access AP according to the ranked results.
Step 205 can be seen in the description of step 104.
In this embodiment, the master AP standardizes the attribute array according to the preset standard value of each AP attribute, so that the unit and the value of the calculated recommended value of each candidate AP are standardized, which is beneficial to improving the efficiency of sorting each candidate AP according to the recommended value, and further improving the speed of acquiring the access AP by the terminal.
Fig. 3 is a flowchart of an AP selection method according to another embodiment of the present invention. This embodiment is implemented based on the embodiment shown in fig. 2, and as shown in fig. 3, after step 205, the method of this embodiment further includes:
and step 206, the master control AP receives the information of the selected access AP returned by the terminal.
Under normal conditions, after receiving the ranking result of the candidate APs provided by the master AP, the terminal selects the access APs according to the ranking result, but in some cases, the terminal selects the access APs based on the ranking result of the candidate APs, but the finally selected access APs may not be the candidate APs with the maximum recommended value in the ranking result of the candidate APs. For example, assuming that there are 4 candidate APs, the ranking result provided by the master AP and ranked according to the order of the recommended values from small to large is: a first AP, a second AP, a third AP, and a fourth AP. However, the access AP finally selected by the terminal is the third AP instead of the fourth AP.
Based on the method, the terminal feeds back the information of the selected access AP to the master AP every time the terminal selects the access AP.
Step 207, the master control AP determines whether the access AP selected by the terminal is the same as the candidate AP with the maximum recommended value in the ranking result of the candidate APs; if the judgment result is negative, go to step 208; if the determination result is yes, step 209 is performed.
And after the master control AP learns the access AP selected by the terminal, judging whether the access AP selected by the terminal is the same as the candidate AP with the maximum recommended value in the sequencing result of the candidate APs. For example, taking the example in step 206 as an example, if the access AP finally selected by the terminal is the fourth AP, the access AP selected by the terminal is the same as the candidate AP with the maximum recommended value (i.e. the fourth AP) in the ranking result of the candidate APs; the reverse is different.
Step 208, the master AP performs numerical adjustment on the weight coefficients in the weight coefficient vector, so that the candidate AP with the largest recommended value in the ranking results of the candidate APs re-ranked according to the adjusted weight coefficient vector is the same as the access AP selected by the terminal, and step 209 is executed.
When the access AP selected by the terminal is different from the candidate AP with the largest recommended value in the ranking results of the candidate APs, it indicates that there may be some error between the ranking results of the candidate APs provided by the master AP and the actual situation, so the master AP performs numerical adjustment on the weight coefficients in the weight coefficient vector according to the error. Wherein, the basis of the adjustment is as follows: the sum of the weight coefficients corresponding to the adjusted APs is still 1, and the recommended value of each candidate AP is recalculated according to the adjusted weight coefficient vector and the assigned attribute array, so that the candidate AP with the largest recommended value in the ordering result after reordering the candidate APs according to the recalculated recommended value is the same as the access AP selected by the terminal. Still taking the example in step 206 as an example, the adjustment to the weighting system vector should enable the order of the reordered candidate APs to be: a third AP, a fourth AP, a second AP, and a first AP.
And step 209, ending the operation.
In this embodiment, the terminal feeds back the information of the selected access AP to the master AP, so that the master AP can adjust the weight coefficient vector according to the selection result of the terminal, and the weight coefficient of each AP attribute can adapt to the actual application environment, thereby providing a condition for the master AP to provide a more accurate ranking result of candidate APs for the terminal, and further improving the accuracy and success rate of selecting the access AP by the terminal.
Fig. 4 is a schematic structural diagram of an AP according to an embodiment of the present invention. As shown in fig. 4, the AP of the present embodiment includes: a candidate selection module 41, an attribute array processing module 42, a recommendation value acquisition module 43, and a ranking processing module 44.
The candidate selecting module 41 is configured to select a candidate AP from the AP and other APs according to the signal strength from the AP to the terminal, the acquired signal strength from the other APs to the terminal, and a preset signal strength threshold.
An attribute array processing module 42, connected to the candidate selecting module 41, configured to collect information about the terminal and the candidate APs, and assign an attribute array corresponding to the candidate AP according to the collected information, where the attributes of the APs in the attribute array include: signal strength between the candidate AP and the terminal, access capability of the candidate AP, channel utilization, and signal-to-interference ratio.
And a recommended value obtaining module 43, connected to the attribute array processing module 42, configured to calculate a weight coefficient vector of the attribute array of the candidate AP, and calculate a recommended value of the candidate AP according to the weight coefficient vector and the attribute array.
And the sorting processing module 44 is connected to the recommended value obtaining module 43, and is configured to sort the candidate APs according to the recommended values of the candidate APs, and provide a sorting result to the terminal, so that the terminal selects an access AP according to the sorting result.
The AP in this embodiment may be a master AP in a network, which may be configured in advance by an administrator, or may be elected through an election mechanism.
Each functional module of the AP in this embodiment may be configured to execute the process of the AP selection method shown in fig. 1, and specific working principles thereof are not described again, for details, see description of the method embodiment.
In the AP of this embodiment, first, according to the signal strength from each AP to the terminal and a preset signal strength threshold, a candidate AP is selected from all APs, then, according to a plurality of attributes of the candidate AP and a corresponding weight coefficient, the candidate APs are ranked, and a ranking result is provided to the terminal, so that the terminal selects an access AP according to the ranking result.
Fig. 5 is a schematic structural diagram of an AP according to another embodiment of the present invention. The embodiment is implemented based on the embodiment shown in fig. 4, and as shown in fig. 5, in this embodiment, the candidate selection module 41 is specifically configured to compare the signal strength from the AP to the terminal and the acquired signal strength from other APs to the terminal with the signal strength threshold respectively, and take the AP whose signal strength to the terminal is greater than the signal strength threshold as the candidate AP.
The recommended value obtaining module 43 is specifically configured to construct a fuzzy complementary judgment matrix according to five scales or nine scales, calculate a weight coefficient vector by using a weight calculation method (for example, a minimum variance method) of sorting the fuzzy complementary judgment matrix, and calculate a recommended value of the candidate AP according to the weight coefficient vector and the attribute array.
Further, the recommended value obtaining module 43 is specifically configured to calculate a weight coefficient vector of the attribute array of the candidate APs, multiply each attribute value corresponding to each candidate AP in the attribute array by a corresponding weight coefficient in the weight coefficient vector, and then add the multiplication results corresponding to each candidate AP to calculate a recommended value of each candidate AP.
Further, the AP of this embodiment further includes: a normalization processing module 51.
The normalization processing module 51 is connected to the attribute array processing module 42 and the recommended value obtaining module 43, and is configured to, before the recommended value obtaining module 43 calculates the recommended value of the candidate AP, normalize the attribute array assigned by the attribute array processing module 42 according to the preset standard value of the AP attribute in the attribute array, and provide the normalized attribute array to the recommended value obtaining module 43.
Further, the AP of the present embodiment further includes: a receiving module 52, a judging module 53 and a coefficient adjusting module 54.
The receiving module 52 is configured to receive information of the selected access AP returned by the terminal. The determining module 53 is connected to the receiving module 52, and is configured to determine whether the access AP selected by the terminal and received by the receiving module 52 is the same as the candidate AP with the largest recommended value in the ranking results of the candidate APs. And a coefficient adjusting module 54, connected to the determining module 53, configured to, when the determination result of the determining module 53 is negative, perform numerical adjustment on the weight coefficient in the weight coefficient vector, so that the candidate AP with the largest recommended value in the ranking results of the candidate APs reordered according to the adjusted weight coefficient vector is the same as the access AP selected by the terminal.
The functional modules may be configured to execute corresponding processes in the AP selection method shown in fig. 1, fig. 2, or fig. 3, and specific working principles thereof are not described again, for details, see description of method embodiments.
According to the AP provided by the embodiment, the candidate APs are selected from the AP according to the signal strength from all the APs to the terminal and the preset signal strength threshold value, then the candidate APs are ranked according to the multiple attributes of the candidate APs and the corresponding weight coefficients, and the ranking result is provided for the terminal, so that the terminal selects the AP to be accessed according to the ranking result.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
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 the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (12)
1. A method for selecting a wireless Access Point (AP), comprising:
the method comprises the steps that a master control AP selects candidate APs from a master control AP and other APs according to the signal intensity from the master control AP to a terminal, the acquired signal intensity from the other APs to the terminal and a preset signal intensity threshold;
the master control AP collects information of the terminal and the candidate AP, and assigns values to the attribute array corresponding to the candidate AP according to the collected information; the AP attributes in the attribute array include: signal strength between the candidate AP and the terminal, access capability of the candidate AP, channel utilization rate and signal-to-interference ratio;
the master control AP calculates a weight coefficient vector of an attribute array of the candidate AP, and calculates a recommended value of the candidate AP according to the weight coefficient vector and the attribute array;
and the master control AP sequences the candidate APs according to the recommended values of the candidate APs and provides sequencing results for the terminal so that the terminal can select to access the APs according to the sequencing results.
2. The AP selection method according to claim 1, wherein the selecting, by the master AP, the candidate AP from the master AP and the other APs according to the signal strength from the master AP to the terminal, the obtained signal strength from the other APs to the terminal, and a preset signal strength threshold comprises:
and the master control AP compares the signal strength from the master control AP to the terminal and the acquired signal strength from other APs to the terminal with the signal strength threshold respectively, and takes the AP with the signal strength to the terminal larger than the signal strength threshold as a candidate AP.
3. The AP selection method of claim 1, wherein the master AP computing a weight coefficient vector for the array of attributes of the candidate APs comprises:
the master control AP constructs a fuzzy complementary judgment matrix according to five scales or nine scales;
and the master control AP calculates the weight coefficient vector by using a weight calculation method of the fuzzy complementary judgment matrix sorting.
4. The AP selection method of claim 1, wherein the calculating, by the master AP, the recommended values of the candidate APs according to the weight coefficient vector and the attribute array comprises:
and the master control AP multiplies each attribute value corresponding to each candidate AP in the attribute array by a corresponding weight coefficient in the weight coefficient vector respectively, and then adds the multiplication results corresponding to each candidate AP to calculate the recommended value of each candidate AP.
5. The AP selection method according to any one of claims 1-4, wherein the calculating, by the master AP, the recommended value of the candidate AP according to the weight coefficient vector and the attribute array comprises:
and the master control AP standardizes the attribute array according to a preset standard value of the AP attribute in the attribute array.
6. The AP selection method according to any one of claims 1-4, further comprising:
the master control AP receives the information of the selected access AP returned by the terminal and judges whether the access AP selected by the terminal is the same as the candidate AP with the maximum recommended value in the sequencing result of the candidate APs;
if the access AP selected by the terminal is different from the candidate AP with the maximum recommended value in the sequencing results of the candidate APs, the main control AP performs numerical adjustment on the weight coefficient in the weight coefficient vector, so that the candidate AP with the maximum recommended value in the sequencing results of the candidate APs subjected to reordering according to the adjusted weight coefficient vector is the same as the access AP selected by the terminal.
7. A wireless Access Point (AP), comprising:
a candidate selection module, configured to select a candidate AP from the AP and the other APs according to the signal strength from the AP to the terminal, the acquired signal strength from the other APs to the terminal, and a preset signal strength threshold;
an attribute array processing module, configured to collect information about a terminal and the candidate AP, and assign a value to an attribute array corresponding to the candidate AP according to the collected information, where an AP attribute in the attribute array includes: signal strength between the candidate AP and the terminal, access capability of the candidate AP, channel utilization rate and signal-to-interference ratio;
a recommended value obtaining module, configured to calculate a weight coefficient vector of an attribute array of the candidate AP, and calculate a recommended value of the candidate AP according to the weight coefficient vector and the attribute array;
and the sequencing processing module is used for sequencing the candidate APs according to the recommended values of the candidate APs and providing sequencing results to the terminal so that the terminal can select the access APs according to the sequencing results.
8. The AP of claim 7, wherein the candidate selection module is specifically configured to compare the signal strength from the AP to the terminal and the acquired signal strength from the other APs to the terminal with the signal strength threshold respectively, and use the AP with the signal strength to the terminal greater than the signal strength threshold as the candidate AP.
9. The AP according to claim 7, wherein the recommended value obtaining module is specifically configured to construct a fuzzy complementary decision matrix according to five scales or nine scales, calculate the weight coefficient vector by using a weight calculation method of the fuzzy complementary decision matrix sorting, and calculate the recommended value of the candidate AP according to the weight coefficient vector and the attribute array.
10. The AP of claim 7, wherein the recommendation value obtaining module is specifically configured to calculate a weight coefficient vector of an attribute array of the candidate APs, and multiply each attribute value corresponding to each candidate AP in the attribute array by a corresponding weight coefficient in the weight coefficient vector, and then add the multiplication results corresponding to each candidate AP to calculate the recommendation value of each candidate AP.
11. The AP of any one of claims 7-10, further comprising:
and the standardization processing module is used for carrying out standardization processing on the attribute array according to a preset standard value of the AP attribute in the attribute array before the recommended value acquisition module calculates the recommended value of the candidate AP.
12. The AP of any one of claims 7-10, further comprising:
a receiving module, configured to receive information of the selected access AP returned by the terminal;
the judging module is used for judging whether the access AP selected by the terminal is the same as the candidate AP with the maximum recommended value in the sequencing result of the candidate APs;
and the coefficient adjusting module is used for performing numerical value adjustment on the weight coefficient in the weight coefficient vector when the judgment result of the judging module is negative, so that the candidate AP with the maximum recommended value in the ranking result of the candidate APs reordered according to the adjusted weight coefficient vector is the same as the access AP selected by the terminal.
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