CN117098115A - Roaming control method, roaming control device, network equipment and storage medium - Google Patents

Roaming control method, roaming control device, network equipment and storage medium Download PDF

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Publication number
CN117098115A
CN117098115A CN202311150175.6A CN202311150175A CN117098115A CN 117098115 A CN117098115 A CN 117098115A CN 202311150175 A CN202311150175 A CN 202311150175A CN 117098115 A CN117098115 A CN 117098115A
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Prior art keywords
target
access point
candidate
station
parameter information
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童金龙
毛宇飞
王伟
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TP Link Technologies Co Ltd
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TP Link Technologies Co Ltd
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Priority to CN202311150175.6A priority Critical patent/CN117098115A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/183—Processing at user equipment or user record carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The application discloses a roaming control method, a roaming control device, network equipment and a computer readable storage medium. The method is applied to the access point and comprises the following steps: under the condition that the signal intensity of the target station meets the preset signal intensity condition, sending a scanning instruction to the target station so as to trigger the target station to scan other access points including candidate access points, wherein the target station is associated with the access points; receiving first network parameter information fed back by a target station based on scanning of candidate access points; acquiring second network parameter information, wherein the second network parameter information is used for describing network attributes of the mesh network; determining a target access point in the candidate access points according to the first network parameter information and the second network parameter information; the roaming proposal is sent to the target station based on the target access point to suggest that the target station roams to the target access point. By the scheme of the application, the better access point for roaming can be selected for the station on the premise of not occupying excessive resources of the station.

Description

Roaming control method, roaming control device, network equipment and storage medium
Technical Field
The present application relates to the field of wireless communications technologies, and in particular, to a roaming control method, a roaming control device, a network device, and a computer readable storage medium.
Background
In the scenario that each routing product performs mesh (mesh) networking, when a Station (STA) moves, it may get farther from an associated Access Point (AP), thereby causing network signal degradation of the station. In this case, the station may roam to other access points to maintain its network quality.
Currently, when roaming is required, a station generally selects an access point with which roaming is desired. This approach not only occupies the resources of the station, but also may make it difficult for the selected access point to achieve a better roaming effect because the mesh network is not fully considered.
Disclosure of Invention
The application provides a roaming control method, a roaming control device, network equipment and a computer readable storage medium, which can select a better access point for roaming for a station on the premise of not occupying excessive resources of the station.
In a first aspect, the present application provides a roaming control method, where the roaming control method is applied to an access point, and the roaming control method includes:
Under the condition that the signal intensity of the target station meets the preset signal intensity condition, a scanning instruction is sent to the target station to trigger the target station to scan other access points including the selected access point, wherein the target station is the station currently associated with the access point, and the candidate access point is an access point which can be used as a roaming destination in a mesh network where the access point is located;
receiving first network parameter information fed back by a target station based on scanning of candidate access points;
acquiring second network parameter information, wherein the second network parameter information is used for describing network attributes of the mesh network;
determining a target access point in the candidate access points according to the first network parameter information and the second network parameter information;
a roaming proposal is sent to the target station for suggesting that the target station roam to the target access point.
In a second aspect, the present application provides a roaming control device, which is applied to an access point, and includes:
the first sending module is used for sending a scanning instruction to the target station to trigger the target station to scan other access points including candidate access points under the condition that the signal strength of the target station meets the preset signal strength condition, wherein the target station is a station currently associated with the access point, and the candidate access point is an access point which can be used as a roaming destination in a mesh network where the access point is located;
A receiving module, configured to receive first network parameter information fed back by a target station based on scanning of candidate access points;
the acquisition module is used for acquiring second network parameter information, wherein the second network parameter information is used for describing network attributes of the mesh network;
the determining module is used for determining a target access point from the candidate access points according to the first network parameter information and the second network parameter information;
and the second sending module is used for sending roaming advice to the target site, wherein the roaming advice is used for suggesting the target site to roam to the target access point.
In a third aspect, the present application provides a network device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method of the first aspect when executing the computer program.
In a fourth aspect, the present application provides a computer readable storage medium storing a computer program which, when executed by a processor, performs the steps of the method of the first aspect.
In a fifth aspect, the present application provides a computer program product comprising a computer program which, when executed by one or more processors, implements the steps of the method of the first aspect described above.
Compared with the prior art, the application has the beneficial effects that: on the one hand, the access point with which the station is currently associated provides roaming guidance for the station, and the process does not require the station to perform correlation analysis operation, so that the resources of the station can be saved. On the other hand, the network information of the whole mesh network is fully and comprehensively considered in the process of performing roaming guidance on the access point currently associated with the station, so that the target access point truly suitable for roaming association of the station can be determined. Through the two aspects, the scheme of the application can select the better access point for roaming for the station on the premise of not occupying excessive resources of the station.
It will be appreciated that the advantages of the second to fifth aspects may be found in the relevant description of the first aspect, and are not described here again.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an implementation flow of a roaming control method according to an embodiment of the present application;
fig. 2 is a schematic diagram of interaction between a station and an access point in a roaming control method according to an embodiment of the present application;
fig. 3 is a block diagram of a roaming control device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a network device according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
In order to illustrate the technical scheme provided by the application, the following description is made by specific embodiments.
The roaming control method provided by the embodiment of the application can be applied to the AP. Specifically, the AP may be an AP (AP multi-link device, AP MLD) supporting multi-link communication, or may be a common AP, which is not limited in the embodiment of the present application. For convenience of distinction, the embodiment of the present application refers to an AP to which the roaming control method is applied as a current AP. Referring to fig. 1, the implementation flow of the roaming control method is described in detail as follows:
Step 101, sending a scanning instruction to the target STA when the signal strength of the target STA meets the preset signal strength condition.
Wherein the target STA refers to the STA being associated with the current AP. Considering that the current AP may actually be associated with a plurality of STAs, the number of the target STAs is not limited in the embodiment of the present application. For each target STA, the current AP can periodically detect the signal strength of the target STA and judge whether the signal strength of the target STA meets the preset signal strength condition. The signal strength condition is set based on roaming scenario, i.e. the signal strength condition may be used as a trigger condition for roaming. For example only, the preset signal strength condition may be: the signal strength of the target STA is less than a preset signal strength threshold.
Under the condition that the signal strength of the target STA meets the preset signal strength condition, it can be inferred that the signal strength of the current AP is also weak for the target STA, and the target STA can be considered to have roaming requirement. The current AP can comprehensively screen all the APs in the mesh network where the current AP is located, and other APs which can be used as roaming purposes are searched out to serve as candidate APs. In the embodiment of the application, the number of candidate APs is not limited.
The current AP may send a scan instruction to the target STA to cause the target STA to scan for other APs including candidate APs. For example, it may be to scan only candidate APs to obtain feedback of candidate APs; alternatively, more APs (e.g., full channel APs) may be scanned to obtain feedback from more APs and candidate APs may be selected therefrom, which is not limited herein.
In some examples, the scan instruction may be specifically a Beacon Request, and the current AP may populate a basic service set (Basic Service Set, BSS) name of each candidate AP into the Beacon Request; that is, the scanning instruction carries BSSs of each candidate AP. In practice, this operation is also equivalent to designating the scan channel of the target STA. In addition, in the scan instruction, the scan mode of the target STA may be designated as active scan. That is, the scanning instruction may instruct the target STA to scan the BSS, where the designated scanning channel is the channel where each candidate AP is located, the designated service set identifier (Service Set Identifier, SSID) is the current mesh network, and the designated scanning mode is active scanning (i.e. let the target STA send a probe request).
In some embodiments, the current AP may locally store network information of the mesh network, and may also store preset communication conditions, where the preset communication conditions are used for primarily screening the APs available for roaming, that is, primarily screening to obtain candidate APs. Based on this, step 101 may be embodied as: under the condition that the signal intensity of the target STA meets the signal intensity condition, screening candidate APs meeting preset communication conditions from the mesh network according to the network information of the mesh network stored by the current AP, and sending a scanning instruction to the target STA based on the candidate APs. Among these, factors considered in setting the communication conditions include, but are not limited to, one or more of the following: channel utilization and load (number of associated STAs). By way of example only, when setting the communication condition based on the channel utilization, the communication condition may be; the channel utilization rate of the AP is lower than a preset utilization rate threshold value; when the communication condition is set based on the load, the communication condition may be; the number of associated STAs of the AP is less than a preset number threshold.
Step 102, receiving first network parameter information fed back by the target STA based on the scanning of the candidate APs.
After actively scanning in given frequency bands based on the received scanning instruction, the target STA may reply a probe response (probe response) to the candidate AP that receives the probe request. Thus, the target STA may feed back to the current AP according to all the probe responses received by the target STA, where the data fed back by the target STA includes the first network parameter information. It can be appreciated that the first network parameter is derived from the scan result of the target STA.
In some examples, the data fed back by the target STA to the current AP may be specifically Beacon Report, which includes first network parameter information including, but not limited to: the signal strength, frequency band and BSSID of each scanned BSS. The signal strength of each scanned BSS is the signal strength of each candidate AP that replies with a probe response, which may be represented by a received channel power parameter (Received Channel Power Indicator, RCPI), and RCPI may be inter-converted with a signal strength indicator (Received Signal Strength Indication, RSSI) and a signal-to-noise ratio (Signal to Interference plus Noise Ratio, SNR).
Step 103, obtaining second network parameter information.
The current AP may further collect second network parameter information after receiving feedback from the target STA. The second network parameter information may be used to describe a network attribute of the mesh network. In some examples, the second network parameter may include, but is not limited to: the embodiment of the present application does not limit the data type included in the second network parameter, such as the topology of the mesh network, the network rate from each AP (including a normal AP and an AP MLD) to a Central Access Point (CAP) in the mesh network, the media access control (Media Access Control) address of each AP in the mesh network, each BSSID forming each AP MLD, the frequency band where each BSS is located, the wireless specification of each AP in the mesh network, and the wireless specification of the target STA. The above information may be obtained by maintaining the current AP timing, or may be obtained by the current AP immediately requesting it, which is not described here.
And 104, determining a target AP in the candidate APs according to the first network parameter information and the second network parameter information.
According to the obtained first network parameters and second network parameters, the current AP can analyze the performance possibly presented by the target STA after being associated with each candidate AP, and accordingly the candidate AP with the best performance possibly presented is determined as the target AP. In some examples, the current AP may be considered primarily from the perspective of network speed in determining the target AP.
Step 105, sending roaming advice to the target STA.
After determining the target AP, the current AP may send a roaming proposal to the target STA based on the target AP, the roaming proposal being used to suggest the target STA to roam to the target AP. In some examples, the roaming proposal may be embodied as a BTM Request into which the current AP may populate the information of the target AP; that is, the roaming proposal carries information of the target AP.
In some embodiments, the target STA does not directly follow the roaming proposal after receiving the roaming proposal, but selects whether to roam to the target AP based on its own roaming policy; that is, the roaming proposal is not mandatory. In the event that a determination is made to roam to the target AP, the target STA may reply to the current AP, and thereafter disconnect from the current AP and associate with the target AP. In some examples, the reply by the target STA to the current AP may be specifically a BTM Response.
In some embodiments, from a network perspective, the target AP may specifically be determined by:
a1, determining estimated communication rates of the target STA and each candidate AP after being associated according to the first network parameter information and the second network parameter information.
It will be appreciated that for a wireless terminal, its wireless rate can be calculated by the following equation:
in the above formula, data Rate is the calculated nothingA line rate; n (N) SD The number of subcarriers; n (N) BPSCS The number of coded bits for a single carrier; r is the code rate; n (N) SS Is the number of spatial streams; t (T) DFT OFDM (Orthogonal Frequency Division Multiplexing) symbol intervals; t (T) GI Is a guard interval. Wherein N is BPSCS R and T DFT May be determined by negotiating a modulation and coding strategy (Modulation and Coding Scheme, MCS); the MCS can also be determined by the SNR, which has a higher positive correlation; n (N) SD Can be determined by wireless mode and bandwidth; n (N) SS Is also easier to obtain, N which can be currently used by the wireless terminal SS Determining; t (T) GI May be determined by channel multipath interference.
Based on the above formula, the embodiment of the application provides a formula for estimating the estimated wireless rate after the target STA associates with the candidate AP:
Estimate Air Rate＝Rate SNRtoMCS ×N SD ×N SS
in the above, rate SNRtoMCS Can be obtained based on the lookup of the corresponding relation table of the SNR and the MCS of the wireless mode corresponding to the candidate AP, and the corresponding relation table can be used for representing the corresponding 20MHz bandwidth and 1N under each MCS SS The rate of negotiation at that time. Wherein the correspondence table is obtained by laboratory testing. It can be understood that a tester can perform experiments in different frequency bands in advance by adopting each wireless mode, so as to obtain a corresponding relation table of SNR and MCS in the corresponding frequency band and the corresponding mode.
For example only, under the WIFI7 mechanism, the table of correspondence between SNR and MCS in one wireless mode of the 5G band may be as shown in table 1 below:
TABLE 1
Similarly, the correspondence table of SNR and MCS in the format of table 1 is also shaped for each other radio mode of the 5G band and each radio mode of the 2G band. It should be noted that the values in table 1 are only examples and are not limiting. In practical application, the corresponding relation table of the SNR and the MCS can be selected based on the frequency band of each candidate AP and the adopted wireless mode.
In the above, N SD Can be obtained based on a subcarrier table corresponding to the bandwidth of the wireless mode corresponding to the candidate AP.
Wherein, the wireless mode, bandwidth and N corresponding to the candidate AP SS Are available from the maximum wireless specification supported by both the target STA and the candidate AP.
However, for the target STA, when determining the estimated communication rate after the target STA associates with the candidate AP, the real-time rate from the current AP to the CAP needs to be considered in addition to the estimated wireless rate. Based on this, if the current AP is represented by RE, the estimated communication rate obtained after the association between the target STA and the candidate AP can be calculated by the following formula in the case that the mesh network is a wireless mesh network:
Under the condition that the mesh network is a wired mesh network, the estimated communication rate obtained after the target STA is associated with the candidate AP can be calculated by the following formula:
Estimate Rate＝min(Estimate Air Rate,Rate REtoCAP )
in the above, rate REtoCAP The real-time rate from the current AP to the CAP is the real-time rate; estimate Air Rate is the result obtained by calculating the formula of estimating the wireless rate.
Through the process, the current AP can fully and effectively utilize the network parameter information such as the signal intensity, the AP wireless specification, the STA wireless specification, the Mesh network internal overhead and the like, and the estimated communication rate of the target STA after being associated with the candidate AP is given.
A2, determining the candidate AP corresponding to the highest estimated communication rate as a target AP.
Through the step A1, the estimated communication rate after the target STA is respectively associated with each candidate AP can be obtained; that is, each candidate AP has a corresponding calculated estimated communication rate. The current AP may determine the highest estimated communication rate among all of the estimated communication rates. It can be understood that the candidate AP corresponding to the highest estimated communication rate is the AP that is expected to perform best in the dimension of the network speed, so that the current AP can determine the candidate AP as the target AP.
In some embodiments, the target STA may be located further from each AP due to uncertainty in the user's movements. In this case, the expected performance of each candidate AP may not be as good as the current AP. Based on this, in order to avoid meaningless roaming by the target STA, the roaming control method may further include, before step A2: the highest estimated communication rate is compared with the specified rate. Wherein the specified rate is determined based on the target STA and the current AP. In some examples, the specified rate may be a real-time rate that the target STA associates with the current AP and then the current AP; alternatively, the specified rate may be an estimated communication rate after the target STA associates with the current AP, which may be specifically obtained by referring to the foregoing calculation process of the estimated communication rate.
Accordingly, step A2 may be embodied as: under the condition that the highest estimated communication rate exceeds the specified rate, determining a candidate AP corresponding to the highest estimated communication rate as a target AP; otherwise, if the highest estimated communication rate does not exceed the specified rate, no candidate AP is determined as the target AP, and the current AP will not send roaming advice to the target STA, i.e., the current AP will not direct the target STA to roam.
Further, from the aspect of stability, under the condition that frequent handoff association of the target STA is not expected, even if the highest estimated communication rate exceeds the specified rate, as long as the difference between the estimated communication rate and the specified rate does not exceed the preset difference, or the ratio of the estimated communication rate to the specified rate does not exceed the preset ratio, the candidate AP corresponding to the highest estimated communication rate may not be determined as the target AP; that is, the current AP may consider that the candidate AP corresponding to the estimated communication rate is significantly better than the current AP when the difference between the highest estimated communication rate and the specified rate exceeds a preset difference or the ratio of the estimated communication rate to the specified rate exceeds a preset ratio, and may determine the candidate AP as the target AP.
In some embodiments, in the case where the candidate AP is an AP MLD and the target STA is a non-AP MLD, the step A1 may include:
b1, determining a target link of the candidate AP according to the current link used by the target STA.
For candidate APs that are AP MLDs, there are differences in radio specifications of the respective MLO links thereunder, and the frequency bands where the respective MLO links are located may also be different. Based on this, the current AP may determine the target link of the candidate AP based on the current link used by the target STA.
And B2, calculating the estimated wireless rate of the target STA on each target link of the candidate AP according to the first network parameter information and the second network parameter information.
And reserving information related to each target link in the obtained first network parameter information and second network parameter information, and calculating the estimated wireless rate of the target STA on each target link of the candidate AP by adopting the calculation formula of the estimated wireless rate given by the previous step.
Specifically, as can be seen from the foregoing description, the calculation process of the estimated wireless rate involves the information of the frequency band. Based on this, the current AP may first determine which frequency bands of the candidate AP are the frequency bands in which the target link is located. It should be noted that in this process, only 2G and 5G are generally distinguished, and the specific priority is 5G1>5G4>2G. For example, candidate APs have BSSs at 2G, 5G1, and 5G 4; in the case that the current link used by the target STA is 2g+5g1, 2G and 5G1 are used in calculating the estimated wireless rate; in the case where the current link used by the target STA is 2g+5g4, 2G and 5G1 are used in calculating the estimated communication rate (5G 1 and 5G4 are both regarded as 5G,5G1 being better); in the case where the current link used by the target STA is 5g1+5g4, 5G1 and 5G4 are used in calculating the estimated communication rate.
It should be noted that there are also cases where the candidate AP lacks the frequency band of the current link used by the target STA. For example, the current link used by the target STA is 5g1+5g4, the current AP has three frequencies of 2G, 5G1 and 5G4, and the candidate APs have only two frequencies of 2G and 5G, and 2g+5g1 is used in calculating the estimated communication rate.
And B3, determining the estimated communication rate after the target STA is associated with the candidate AP according to the estimated wireless rates of the target STA on each target link of the candidate AP.
For candidate APs that are AP MLDs, the current AP may be pre-set with an evaluation policy. In the embodiment of the application, two possible evaluation strategies are proposed. These two evaluation strategies are described below:
the first evaluation strategy is; only one MLO link of the plurality of MLO links is considered. Based on the estimated communication rate, the current AP can determine an optimal link in the target link according to a preset evaluation dimension, and then determine the estimated communication rate of the target STA after being associated with the candidate AP according to the estimated wireless rate of the target STA on the optimal link. In some examples, the evaluation dimension may be rate-first, and the optimal link may be: the MLO link with the highest estimated wireless rate in the MLO links. In other examples, the evaluation dimension may be stability first, and the optimal link may be: the MLO link with the lowest estimated wireless rate in the MLO links. In still other examples, the evaluation dimension may be location adaptive priority, and the optimal link may be: the MLO links with the optimal signal quality in each MLO link.
The second evaluation strategy is: all MLO links of the candidate AP are considered by means of weighting. Based on the above, the current AP may determine the candidate estimated rates of the target STA on each target link of the candidate AP according to the estimated wireless rates of the target STA on each target link of the candidate AP, then perform weighted average calculation on all the candidate estimated rates according to a preset weight distribution, and finally determine the result obtained by the weighted average calculation as the estimated communication rate associated with the candidate AP. Wherein the weights may be set to be flat weights or may be focused on certain links. In some examples, from a rate priority perspective, links that may be set to flat weights, or set to high rates, have high weights; from the stability priority point of view, links with low rate can be set to have high weights; from the position adaptation priority point of view, links with good signal quality can be set to have high weights. Of course, other factors may also be considered in setting the weights, for example, consideration of inter-band differences, etc., which are not limited herein.
Referring to fig. 2, fig. 2 shows an example of interaction flow among the target STA, the current AP and the candidate AP in the case where the target STA is a non-AP MLD and the APs are both AP MLDs. The interaction flow shown in fig. 2 is briefly described as follows:
Non-AP MLD is initially associated with AP MLD 1. The signal of the Non AP MLD becomes gradually weaker due to the movement of the Non AP MLD, thereby triggering the roaming control method provided by the embodiment of the present application.
Firstly, the AP MLD1 screens out a plurality of candidate APs (for example, AP MLD2 and AP MLD3 shown in fig. 2) and triggers the Non AP MLD to scan, so as to obtain corresponding network parameter information (including first network parameter information and second network parameter information) based on each candidate AP.
Subsequently, the AP MLD1 determines a target AP (for example, AP MLD2 shown in fig. 2) according to the network parameter information corresponding to each candidate AP.
The AP MLD1 then broadcasts a roaming decision to inform other individual APs in the mesh network which AP is currently determined as the target AP. For each of the other APs, if it finds itself not the target AP (e.g., AP MLD3 and AP MLD4 shown in fig. 2), then the probe of the Non AP MLD may not be responded to later to avoid association with the Non AP MLD. This process is called roaming collaborative process.
Thereafter, the Non AP MLD disconnects the association with AP MLD1 and roams the association to AP MLD2.
Finally, the AP MLD2 performs roaming result synchronization. AP MLD2 may broadcast to all APs, thereby enabling each AP to update the information of the maintained topology, etc.
From the above, in the embodiment of the present application, on one hand, the access point currently associated with the station provides roaming guidance for the station, and the process no longer requires the station to perform correlation analysis operation, so that resources of the station can be saved. On the other hand, the network information of the whole mesh network is fully and comprehensively considered in the process of performing roaming guidance on the access point currently associated with the station, so that the target access point truly suitable for roaming association of the station can be determined. Through the two aspects, the scheme of the application can select the better access point for roaming for the station on the premise of not occupying excessive resources of the station.
Corresponding to the roaming control method provided above, the embodiment of the application also provides a roaming control device. The roaming control device is applied to an access point. As shown in fig. 3, the roaming control device 3 includes:
the first sending module 301 is configured to send a scanning instruction to a target station to trigger the target station to scan other access points including candidate access points if the signal strength of the target station meets a preset signal strength condition, where the target station is a station currently associated with the access point, and the candidate access point is an access point in a mesh network where the access point is located, where the candidate access point can be used as a roaming destination;
A receiving module 302, configured to receive first network parameter information fed back by a target station based on scanning for candidate access points;
an obtaining module 303, configured to obtain second network parameter information, where the second network parameter information is used to describe a network attribute of the mesh network;
a determining module 304, configured to determine a target access point from the candidate access points according to the first network parameter information and the second network parameter information;
a second sending module 305 is configured to send a roaming proposal to the target station, where the roaming proposal is used to suggest that the target station roams to the target access point.
In some embodiments, the determination module 304 includes:
the first determining submodule is used for determining estimated communication rates after the target station is associated with each candidate access point according to the first network parameter information and the second network parameter information;
and the second determining submodule is used for determining the candidate access point corresponding to the highest estimated communication rate as a target access point.
In some embodiments, the determining module 303 further comprises:
the comparison sub-module is used for comparing the highest estimated communication rate with a specified rate, wherein the specified rate is determined based on the target site and the access point;
Correspondingly, the second determining submodule is specifically configured to determine, as the target access point, the candidate access point corresponding to the highest estimated communication rate when the highest estimated communication rate exceeds the specified rate.
In some embodiments, in the case where the target station is a Non AP MLD, the first determining submodule includes:
a link determining unit, configured to determine, for each candidate access point of the AP MLD, a target link of the candidate access point according to a current link used by the target station;
the rate calculation unit is used for calculating the estimated wireless rate of the target station on each target link of the candidate access point according to the first network parameter information and the second network parameter information;
and the rate determining unit is used for determining the estimated communication rate after the target station is associated with the candidate access point according to the estimated wireless rates of the target station on each target link of the candidate access point.
In some embodiments, the rate determination unit comprises:
the first determining subunit is used for determining an optimal link in the target link according to a preset evaluation dimension;
and the second determination subunit is used for determining the estimated communication rate after the target station is associated with the candidate access point according to the estimated wireless rate of the target station on the optimal link.
In some embodiments, the rate determination unit comprises:
a third determining subunit, configured to determine, according to the estimated wireless rates of the target station on each target link of the candidate access point, candidate estimated rates of the target station on each target link of the candidate access point;
the weighting calculation subunit is used for carrying out weighted average calculation on all candidate estimated rates according to preset weight distribution;
and the fourth determining subunit is used for determining the result obtained by the weighted average calculation as the estimated communication rate after being associated with the candidate access point.
In some embodiments, the first transmitting module 301 includes:
the access point screening submodule is used for screening candidate access points meeting preset communication conditions from the mesh network according to the stored network information of the mesh network of the access point under the condition that the signal strength of the target station meets the signal strength condition;
and the instruction sending sub-module is used for sending a scanning instruction to the target site.
From the above, in the embodiment of the present application, on one hand, the access point currently associated with the station provides roaming guidance for the station, and the process no longer requires the station to perform correlation analysis operation, so that resources of the station can be saved. On the other hand, the network information of the whole mesh network is fully and comprehensively considered in the process of performing roaming guidance on the access point currently associated with the station, so that the target access point truly suitable for roaming association of the station can be determined. Through the two aspects, the scheme of the application can select the better access point for roaming for the station on the premise of not occupying excessive resources of the station.
Corresponding to the roaming control method provided above, the embodiment of the application also provides a network device serving as an access point. Referring to fig. 4, the network device 4 in the embodiment of the present application includes: a memory 401, one or more processors 402 (only one shown in fig. 4) and a computer program stored on the memory 401 and executable on the processors. Wherein: the memory 401 is used for storing software programs and units, and the processor 402 executes various function applications and roaming control by running the software programs and units stored in the memory 401 to obtain resources corresponding to the preset events. Specifically, the processor 402 realizes the following steps by running the above-described computer program stored in the memory 401:
under the condition that the signal intensity of the target station meets the preset signal intensity condition, a scanning instruction is sent to the target station to trigger the target station to scan other access points including candidate access points, wherein the target station is a station currently associated with the access point, and the candidate access point is an access point which can be used as a roaming destination in a mesh network where the access point is located;
receiving first network parameter information fed back by a target station based on scanning of candidate access points;
Acquiring second network parameter information, wherein the second network parameter information is used for describing network attributes of the mesh network;
determining a target access point in the candidate access points according to the first network parameter information and the second network parameter information;
a roaming proposal is sent to the target station for suggesting that the target station roam to the target access point.
Assuming that the foregoing is a first possible implementation manner, in a second possible implementation manner provided by taking the first possible implementation manner as a basis, determining, from the candidate access points, the target access point according to the first network parameter information and the second network parameter information includes:
determining estimated communication rates after the target site is associated with each candidate access point according to the first network parameter information and the second network parameter information;
and determining the candidate access point corresponding to the highest estimated communication rate as a target access point.
In a third possible implementation provided by the first possible implementation as a basis, before determining the candidate access point corresponding to the highest estimated communication rate as the target access point, the processor 402 implements the following steps by running the computer program stored in the memory 401:
Comparing the highest estimated communication rate with a specified rate, wherein the specified rate is determined based on the target station and the access point;
accordingly, determining the candidate access point corresponding to the highest estimated communication rate as the target access point includes:
and under the condition that the highest estimated communication rate exceeds the specified rate, determining the candidate access point corresponding to the highest estimated communication rate as the target access point.
In a fourth possible implementation manner provided by the second possible implementation manner, when the target station is a Non AP MLD, determining, according to the first network parameter information and the second network parameter information, an estimated communication rate after the target station is associated with each candidate access point includes:
for each candidate access point of the AP MLD, determining a target link of the candidate access point according to the current link used by the target station;
respectively calculating estimated wireless rates of target sites on each target link of the candidate access points according to the first network parameter information and the second network parameter information;
and determining the estimated communication rate after the target station is associated with the candidate access point according to the estimated wireless rates of the target station on each target link of the candidate access point.
In a fifth possible implementation manner provided by the fourth possible implementation manner, the determining, according to an estimated wireless rate of the target station on each target link of the candidate access point, an estimated communication rate after the target station associates with the candidate access point includes:
determining an optimal link in the target link according to a preset evaluation dimension;
and determining the estimated communication rate after the target station is associated with the candidate access point according to the estimated wireless rate of the target station on the optimal link.
In a sixth possible implementation manner provided by the fourth possible implementation manner, determining, according to an estimated wireless rate of the target station on each target link of the candidate access point, an estimated communication rate after the target station associates with the candidate access point includes:
according to the estimated wireless rates of the target stations on the target links of the candidate access points, determining candidate estimated rates of the target stations on the target links of the candidate access points;
carrying out weighted average calculation on all candidate estimated rates according to preset weight distribution;
and determining a result obtained by the weighted average calculation as the estimated communication rate after being associated with the candidate access point.
In a seventh possible implementation provided on the basis of the first possible implementation, or the second possible implementation, or the third possible implementation, or the fourth possible implementation, or the fifth possible implementation, or the sixth possible implementation, in a case where the signal strength of the target station meets a preset signal strength condition, sending, based on the candidate access point, a scan instruction to the target station includes:
under the condition that the signal strength of the target site meets the signal strength condition, screening candidate access points meeting the preset communication condition from the mesh network according to the network information of the mesh network stored by the access points;
and sending a scanning instruction to the target site.
It should be appreciated that in embodiments of the present application, the processor 402 may be a central processing unit (Central Processing Unit, CPU), which may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSPs), application specific integrated circuits (Application Specific Integrated Circuit, ASICs), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
Memory 401 may include read-only memory and random access memory, and provides instructions and data to processor 402. Some or all of memory 401 may also include non-volatile random access memory. For example, the memory 401 may also store information of a device class.
From the above, in the embodiment of the present application, on one hand, the access point currently associated with the station provides roaming guidance for the station, and the process no longer requires the station to perform correlation analysis operation, so that resources of the station can be saved. On the other hand, the network information of the whole mesh network is fully and comprehensively considered in the process of performing roaming guidance on the access point currently associated with the station, so that the target access point truly suitable for roaming association of the station can be determined. Through the two aspects, the scheme of the application can select the better access point for roaming for the station on the premise of not occupying excessive resources of the station.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of external device software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the system embodiments described above are merely illustrative, e.g., the division of modules or units described above is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
The integrated units described above, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present application may also be implemented by implementing all or part of the flow of the method of the above embodiment, or by instructing the associated hardware by a computer program, where the computer program may be stored on a computer readable storage medium, and where the computer program, when executed by a processor, may implement the steps of each of the method embodiments described above. The computer program comprises computer program code, and the computer program code can be in a source code form, an object code form, an executable file or some intermediate form and the like. The above computer readable storage medium may include: any entity or device capable of carrying the computer program code described above, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer readable Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier wave signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the content of the computer readable storage medium described above may be appropriately increased or decreased according to the requirements of the jurisdiction's legislation and the patent practice, for example, in some jurisdictions, the computer readable storage medium does not include electrical carrier signals and telecommunication signals according to the legislation and the patent practice.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims (10)

1. A roaming control method, wherein the roaming control method is applied to an access point, the roaming control method comprising:
under the condition that the signal intensity of a target station meets a preset signal intensity condition, a scanning instruction is sent to the target station to trigger the target station to scan other access points including candidate access points, wherein the target station is a station currently associated with the access point, and the candidate access point is an access point which can be used as a roaming destination in a mesh network where the access point is located;
receiving first network parameter information fed back by the target station based on scanning the candidate access points;
Acquiring second network parameter information, wherein the second network parameter information is used for describing network attributes of the mesh network;
determining a target access point in the candidate access points according to the first network parameter information and the second network parameter information;
and sending roaming proposal to the target station, wherein the roaming proposal is used for suggesting the target station to roam to the target access point.
2. The roaming control method of claim 1, wherein the determining a target access point among the candidate access points based on the first network parameter information and the second network parameter information comprises:
determining estimated communication rates after the target station is associated with each candidate access point according to the first network parameter information and the second network parameter information;
and determining the candidate access point corresponding to the highest estimated communication rate as a target access point.
3. The roaming control method of claim 2, wherein prior to determining the candidate access point corresponding to the highest estimated communication rate as the target access point, the roaming control method further comprises:
comparing the highest estimated communication rate with a specified rate, wherein the specified rate is determined based on the target station and the access point;
Correspondingly, the determining the candidate access point corresponding to the highest estimated communication rate as the target access point includes:
and under the condition that the highest estimated communication rate exceeds the specified rate, determining the candidate access point corresponding to the highest estimated communication rate as a target access point.
4. The roaming control method of claim 2, wherein, in the case where the target station is a Non AP MLD, the determining, according to the first network parameter information and the second network parameter information, the estimated communication rate after the target station is associated with each candidate access point includes:
for each candidate access point of the AP MLD, determining a target link of the candidate access point according to the current link used by the target station;
according to the first network parameter information and the second network parameter information, respectively calculating estimated wireless rates of the target station on each target link of the candidate access points;
and determining the estimated communication rate after the target station is associated with the candidate access point according to the estimated wireless rates of the target station on the target links of the candidate access points.
5. The roaming control method of claim 4, wherein the determining the estimated communication rate for the target station after association with the candidate access point based on the estimated wireless rates for the target station on each of the target links of the candidate access points comprises:
determining an optimal link in the target links according to a preset evaluation dimension;
and determining the estimated communication rate after the target station is associated with the candidate access point according to the estimated wireless rate of the target station on the optimal link.
6. The roaming control method of claim 4, wherein the determining the estimated communication rate for the target station after association with the candidate access point based on the estimated wireless rates for the target station on each of the target links of the candidate access points comprises:
according to the estimated wireless rates of the target stations on the target links of the candidate access points, determining candidate estimated rates of the target stations on the target links of the candidate access points;
carrying out weighted average calculation on all the candidate estimated rates according to preset weight distribution;
And determining a result obtained by the weighted average calculation as an estimated communication rate associated with the candidate access point.
7. The roaming control method as claimed in any one of claims 1 to 6, wherein the transmitting a scan instruction to a target station in case the signal strength of the target station satisfies a preset signal strength condition, comprises:
under the condition that the signal intensity of the target site meets the signal intensity condition, screening candidate access points meeting the preset communication condition from the mesh network according to the network information of the mesh network stored by the access points;
and sending a scanning instruction to the target site.
8. A roaming control apparatus, the roaming control apparatus being applied to an access point, the roaming control apparatus comprising:
a first sending module, configured to send a scanning instruction to a target station to trigger the target station to scan other access points including candidate access points when the signal strength of the target station meets a preset signal strength condition, where the target station is a station currently associated with the access point, and the candidate access point is an access point capable of serving as a roaming destination in a mesh network where the access point is located;
A receiving module, configured to receive first network parameter information fed back by the target station based on scanning the candidate access points;
the acquisition module is used for acquiring second network parameter information, wherein the second network parameter information is used for describing network attributes of the mesh network;
the determining module is used for determining a target access point from the candidate access points according to the first network parameter information and the second network parameter information;
and the second sending module is used for sending roaming proposal to the target station, wherein the roaming proposal is used for suggesting the target station to roam to the target access point.
9. A network device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 7 when executing the computer program.
10. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the method according to any one of claims 1 to 7.
CN202311150175.6A 2023-09-06 2023-09-06 Roaming control method, roaming control device, network equipment and storage medium Pending CN117098115A (en)

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