CN114125968B - Method and device for switching wireless access points of wireless terminal - Google Patents
Method and device for switching wireless access points of wireless terminal Download PDFInfo
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- CN114125968B CN114125968B CN202111399648.7A CN202111399648A CN114125968B CN 114125968 B CN114125968 B CN 114125968B CN 202111399648 A CN202111399648 A CN 202111399648A CN 114125968 B CN114125968 B CN 114125968B
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- 238000004891 communication Methods 0.000 claims abstract description 130
- 238000012545 processing Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 5
- 230000001960 triggered effect Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- 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 invention discloses a switching method and a switching device of a wireless access point of a wireless terminal. Wherein the method comprises the following steps: when the master station and the wireless access points connected with the master station carry out data communication, the slave station scans at least one target wireless access point according to a preset period under the condition that the slave station meets a preset condition; determining one of the at least one target wireless access point as the wireless access point to be switched; and if the wireless access point connected with the master station point meets the preset triggering condition, switching the wireless access point of the wireless terminal to the wireless access point to be switched. The invention solves the technical problem that the wireless terminal in the prior art cannot realize the switching of the wireless access point efficiently.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for switching a wireless access point of a wireless terminal.
Background
In the related art, for example, a network roaming switching method applied to a vehicle-mounted wireless distribution system (Wireless Distribution System, WDS) communicatively connected to a plurality of Access Points (APs) provided at a road side, includes: the vehicle-mounted WDS performs virtualization configuration in advance and constructs at least two virtual clients; the vehicle-mounted WDS configures a candidate AP association table, initial connection is established, and each AP is virtualized in advance to configure at least two wireless service local area networks; the vehicle-mounted WDS configures a main link and an auxiliary link, wherein the main link is used for being responsible for network communication and data transmission, and the auxiliary link is used for being responsible for roaming switching; the vehicle-mounted WDS receives beacon frames sent by a plurality of adjacent APs in real time, adds the APs meeting the matching requirement into a candidate AP association table, and sorts the APs in the candidate AP association table; when a roaming timer of the vehicle-mounted WDS notifies the roaming detection in a time-reporting manner, the vehicle-mounted WDS detects the signal intensity of the AP currently associated with the auxiliary link, and performs AP switching when the condition of the roaming switching is detected to be met; the step of configuring the main link and the auxiliary link by the vehicle-mounted WDS comprises the following steps: after the vehicle-mounted WDS establishes initial connection, a main link and an auxiliary link are set according to a link definition rule, wherein the links are that the virtual client and the wireless service local area network of the AP are successfully established, and one virtual client is correspondingly connected with one wireless service local area network.
However, the above technical solution has the following technical problems:
1. the manner of implementing AP handoff in this solution uses two virtual clients, one of which (the primary client) is used for communication and the other (the secondary client) is responsible for roaming handoff. However, this solution has the following problems: if the auxiliary client and the main client are on the same channel, only other alternative APs on the channel can be scanned, and if the auxiliary client and the main client are not on the same channel, the auxiliary client can be separated from the channel of the current connected network when switching to other channels, so that the information of the main AP can not be received in real time, and the main client can be disconnected from the association with the main AP.
2. In existing roaming techniques, the condition for triggering roaming is generally that the client detects that the channel strength of the AP is below a certain threshold. The trigger condition is relatively single and sometimes cannot adapt to complex and changeable wireless environments. And, the signal strength is not equivalent to the signal-to-noise ratio, which is a key factor affecting the communication quality.
3. The technical scheme only discusses roaming scenarios, but does not consider AP handoff in other situations (non-roaming scenarios). In some roaming scenarios, the same channel is used by each AP, and the usage scenario is smaller.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for switching wireless access points of a wireless terminal, which at least solve the technical problem that the wireless terminal in the prior art cannot realize the switching of the wireless access points efficiently.
According to an aspect of an embodiment of the present invention, there is provided a handover method of a wireless access point of a wireless terminal, the wireless terminal including a master station and a slave station, the handover method including: when the master station and the wireless access points connected with the master station carry out data communication, the slave station scans at least one target wireless access point according to a preset period under the condition that preset conditions are met; determining one of at least one target wireless access point as a wireless access point to be switched; and if the wireless access point connected with the master station point meets the preset triggering condition, switching the wireless access point of the wireless terminal to the wireless access point to be switched.
Optionally, the secondary station scans at least one target wireless access point according to a preset period if a preset condition is met, including: acquiring the signal-to-noise ratio of a wireless access point connected with the master station; judging whether the signal to noise ratio is continuously smaller than a signal to noise ratio threshold value in a preset time; when the signal-to-noise ratio is continuously smaller than the signal-to-noise ratio threshold, triggering the slave station to scan the target wireless access point in the preset period; and when the signal-to-noise ratio is continuously greater than or equal to the signal-to-noise ratio threshold, the secondary station is not triggered to scan the target wireless access point in the preset period.
Optionally, triggering the slave station to scan the target wireless access point in the preset period includes: detecting whether the master station and a wireless access point connected with the master station perform data communication or not in the preset period; under the condition that the wireless access point connected with the main station and the main station does not perform data communication, the main station enters a power saving mode; under the condition that the main station and the wireless access point connected with the main station carry out data communication, after the wireless access point connected with the main station completes data communication, the main station enters a power saving mode; and after the master station enters a power saving mode, the slave station switches channels and continues to scan the target wireless access point.
Optionally, determining one of the at least one target wireless access point as the wireless access point to be handed off includes: acquiring communication quality of at least one target wireless access point; determining a maximum value of communication quality in at least one of the target wireless access points; and determining the target wireless access point corresponding to the maximum value of the communication quality as the wireless access point to be switched.
Optionally, the preset trigger condition includes a threshold trigger and a communication quality gap trigger, wherein the threshold trigger includes at least one of the following: packet loss rate, signal to noise ratio, wireless communication distance, if the wireless access point connected with the master station point meets the preset triggering condition, switching the wireless access point of the wireless terminal to the wireless access point to be switched, including: if the packet loss rate of the wireless access point connected with the master station is continuously larger than the maximum packet loss rate of the wireless terminal and the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is larger than a first preset value in a preset time range, switching the wireless access point of the wireless terminal to the wireless access point to be switched; if the signal to noise ratio of the wireless access point connected with the master station is continuously smaller than the worst signal to noise ratio of the wireless terminal and the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is larger than a first preset value in a preset time range, switching the wireless access point of the wireless terminal to the wireless access point to be switched; and in a preset time range, if the wireless communication distance between the master station and the wireless access point connected with the master station is continuously larger than the farthest wireless communication distance of the wireless terminal and the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is larger than a first preset value, switching the wireless access point of the wireless terminal to the wireless access point to be switched.
Optionally, the preset triggering condition includes communication quality gap triggering, and if the wireless access point connected with the master station point meets the preset triggering condition, switching the wireless access point of the wireless terminal to the wireless access point to be switched includes: and in a preset time range, if the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is continuously larger than a second preset value, switching the wireless access point of the wireless terminal to the wireless access point to be switched.
Optionally, switching the wireless access point of the wireless terminal to the wireless access point to be switched includes: and establishing communication connection between the slave station and the wireless access point to be switched, and disconnecting communication connection between the master station and the wireless access point connected with the master station.
According to another aspect of the embodiment of the present invention, there is also provided a switching apparatus of a wireless access point of a wireless terminal, where the wireless terminal includes a master station and a slave station, and the switching apparatus includes: the scanning module is used for scanning at least one target wireless access point according to a preset period when the slave station meets a preset condition when the master station performs data communication with the wireless access point connected with the master station; a determining module, configured to determine one of at least one target wireless access point as a wireless access point to be switched; and the switching module is used for switching the wireless access point of the wireless terminal to the wireless access point to be switched if the wireless access point connected with the master station point meets the preset triggering condition.
According to another aspect of the embodiment of the present invention, there is further provided a computer readable storage medium, where the computer readable storage medium includes a stored program, and when the program runs, controls a device where the computer readable storage medium is located to execute the method for switching a wireless access point of any one of the foregoing wireless terminals.
According to another aspect of the embodiment of the present invention, there is further provided a processor, configured to execute a program, where the program executes the method for switching a wireless access point of any one of the foregoing wireless terminals.
In the embodiment of the invention, the wireless terminal comprises a master station and a slave station, and when the wireless access points connected with the master station and the master station are used for data communication, the slave station scans at least one target wireless access point according to a preset period under the condition that the slave station meets a preset condition; determining one of the at least one target wireless access point as the wireless access point to be switched; if the wireless access point connected with the master station point meets the preset trigger condition, the wireless access point of the wireless terminal is switched to the wireless access point to be switched, and the technical effect that the wireless terminal can quickly and efficiently switch the wireless access points is achieved by utilizing the coexistence mechanism of the master station point and the slave station point of the wireless terminal.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a flowchart of a handover method of a wireless access point of a wireless terminal according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a handover apparatus of a wireless access point of a wireless terminal according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
According to an embodiment of the present invention, there is provided an embodiment of a handover method of a wireless access point of a wireless terminal including a master station and a slave station, it being noted that the steps shown in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be performed in an order different from that herein.
Fig. 1 is a flowchart of a method for switching a wireless access point of a wireless terminal according to an embodiment of the present invention, and as shown in fig. 1, the method for switching a wireless access point of a wireless terminal includes the steps of:
step S102, when a master station and a wireless access point connected with the master station carry out data communication, a slave station scans at least one target wireless access point according to a preset period under the condition that a preset condition is met;
the wireless terminal comprises two virtual stations, wherein one virtual station is used as a master station, and the other virtual station is used as a slave station. In the implementation process, the virtual station of the wireless access point which is connected at present can be used as a master station, and the virtual station of the wireless access point which is not connected at present can be used as a slave station. It should be noted that the master station and the slave station may be determined according to whether the current virtual station is already connected to the wireless access point.
In an alternative embodiment, while the master station and the wireless access points connected with the master station perform data communication, the slave station is responsible for periodically scanning signals of other wireless access points on the premise of meeting preset conditions, so as to prepare for rapidly switching the wireless access points at any time. At this time, the other wireless access points are the target wireless access points. In addition, the preset period is set by the wireless terminal according to actual needs, and in a specific implementation process, the preset period may be 5min,15min,1h, etc., which is not limited in any way.
Step S104, determining one of at least one target wireless access point as the wireless access point to be switched;
the number of target wireless access points scanned from the station can be one or a plurality of target wireless access points, so that one target wireless access point meeting the requirements is selected from one or a plurality of target wireless access points to serve as a wireless access point to be switched, and a proper wireless access point is preselected for the subsequent switching wireless access points.
Step S106, if the wireless access point connected with the master station point meets the preset triggering condition, the wireless access point of the wireless terminal is switched to the wireless access point to be switched.
In an alternative embodiment, in the process of switching the wireless access point of the wireless terminal to the wireless access point to be switched, the wireless access point connected with the master station point is required to meet a preset triggering condition, so that the switching action of the wireless terminal is triggered. In a specific implementation process, the preset trigger conditions include, but are not limited to, threshold trigger, communication quality gap trigger, and the like. Further, by means of the triggering mode of the preset triggering condition, detection is more comprehensive and sensitive than detection of the main stream received signal strength indicator (Received Signal Strength Indicator, RSSI), so that when the communication quality of the wireless access point connected with the main station and the main station slips down, the wireless access point can be rapidly switched.
Through the steps, a mechanism of coexistence of the master station and the slave station of the wireless terminal can be utilized, at least one target wireless access point is scanned according to a preset period when the slave station meets preset conditions, one target wireless access point is selected from the at least one target wireless access point to serve as a wireless access point to be switched, and then when the wireless access point connected with the master station meets preset triggering conditions, the wireless access point of the wireless terminal is switched to the wireless access point to be switched, so that the technical effect that the wireless terminal can switch the wireless access points quickly and efficiently is achieved, and the technical problem that the wireless terminal in the prior art cannot switch the wireless access points efficiently is solved.
It should be noted that the above method for switching wireless access points of wireless terminals may be applied to various scenarios, for example, a mobile station may move from the coverage area of one wireless access point to the coverage area of another wireless access point, where a short disconnection occurs in communication at the station side, thereby causing data loss or jamming. The above embodiment of the present invention not only can realize the scanning of the alternative target wireless access points on different channels, but also does not affect the connection state of the current communication, and can determine the switching time of the wireless access points according to the signal-to-noise ratio, the channel utilization and the packet loss rate which are core factors most affecting the communication quality (throughput) in the wireless communication. After the switching delay is optimized as much as possible, the seamless switching on the user body feeling can be realized.
In addition, the switching method of the wireless access point of the wireless terminal can be also used for a wireless roaming scene, so that the switching time delay of a station side in the roaming process is optimized, and the user experience is improved; the method can also be used in non-roaming scenes, and can be used for realizing the rapid switching of the wireless access points as long as the signal coverage of the connectable wireless access points exists in the moving range of the station.
Optionally, the secondary station scans at least one target wireless access point according to a preset period under the condition that a preset condition is met, including: acquiring the signal-to-noise ratio of a wireless access point connected with a master station; judging whether the signal to noise ratio is continuously smaller than a signal to noise ratio threshold value in a preset time; when the signal-to-noise ratio is continuously smaller than the signal-to-noise ratio threshold, triggering the slave station to scan the target wireless access point in a preset period; and when the signal-to-noise ratio is continuously greater than or equal to the signal-to-noise ratio threshold, the secondary station is not triggered to scan the target wireless access point in a preset period.
It should be noted that, the signal-to-noise ratio threshold is a value set in a reasonable range according to the requirement of the actual application scenario, and is only used for triggering scanning, and does not trigger switching.
In an alternative implementation manner, under normal conditions, if normal communication with higher quality is enabled between the wireless access points connected to the master station and the master station, the signal to noise ratio of the wireless access points connected to the master station is greater than or equal to the signal to noise ratio threshold, and no handover to other wireless access points is required; when the signal-to-noise ratio of the wireless access point connected with the master station is smaller than the signal-to-noise ratio threshold, the signal-to-noise ratio is insufficient to trigger the wireless access point to switch, but the signal quality of the wireless access point connected with the master station is reduced, and the slave station needs to be started to prepare for switching to other wireless access points at any time later.
In an alternative embodiment, if the signal to noise ratio of the wireless terminal received from the wireless access point connected with the master station is continuously smaller than the signal to noise ratio threshold value in a preset time, the slave station is triggered to scan the target wireless access point in a preset period; if the signal to noise ratio of the wireless terminal received by the wireless access point connected with the master station is continuously greater than or equal to the signal to noise ratio threshold value in the preset time, the slave station is not triggered to scan the target wireless access point in the preset period. By the embodiment, the secondary station can be prevented from being frequently triggered to scan the target wireless access point in the preset period. It should be noted that, the predetermined time is less than or equal to a duration of the preset period.
Optionally, triggering the slave station to scan the target wireless access point in a preset period includes: detecting whether a wireless access point connected with a main station and a main station performs data communication or not in a preset period; under the condition that the wireless access point connected with the master station does not perform data communication, the master station enters a power saving mode; under the condition that the master station and the wireless access point connected with the master station carry out data communication, the master station enters a power saving mode after the data communication is completed by the wireless access point connected with the master station; after the master station enters the power saving mode, the slave station switches channels and continues to scan for the target wireless access point.
Since the wireless access point connected by the master station and the wireless access point to be scanned by the slave station may not be on the same channel, the problem that the same wireless terminal works on different channels is solved. In an implementation, the scanning of the slave station is periodic, for example, the duration of the preset period is T. When the time T arrives, the master station needs to check whether communication activity exists at present, namely whether the wireless access point connected with the master station performs data communication or not is detected in the preset period; if the wireless access point connected with the main station does not perform data communication, the main station immediately enters a power saving mode; if the wireless access point connected with the master station is in data communication with the master station, the wireless access point connected with the master station enters a power saving mode after the current round of data packet interaction is completed. That is, the wireless access point connected to the master station is informed, and the master station enters the power saving mode, so that the wireless access point connected to the master station considers that the master station is dormant, but not has been disconnected from the network, and therefore the wireless access point connected to the master station can not communicate with the master station frequently. The secondary station can then switch channels in such a way that the secondary station can traverse all channels on the frequency band to find one or more target wireless access points with stronger other signals.
In addition, after the secondary station is triggered to scan the target wireless access point in the preset period, the secondary station needs to save the signal to noise ratio of the wireless access point possibly existing in the scanning result and the channel utilization rate parameter carried in the beacon message of the target wireless access point. After the scanning is finished, the slave station pauses working, the master station jumps out of the power saving mode, and the wireless access point connected with the master station is continued. After the slave station finishes scanning the target wireless access point in the preset period, the scanning time period of the slave station is reset to zero, and when the moment T is reached again, the actions are executed again.
In the above embodiment, in consideration of the shortfall in the channel switching problem in the mainstream technology, the secondary station can switch channels to scan the target wireless access point by using the power saving mode mechanism without disconnecting the wireless connection between the wireless access points connected to the primary station and the primary station.
Optionally, determining one of the at least one target wireless access point as the wireless access point to be handed off includes: acquiring communication quality of at least one target wireless access point; determining a maximum value of communication quality in at least one target wireless access point; and determining the target wireless access point corresponding to the maximum value of the communication quality as the wireless access point to be switched.
In an alternative embodiment, the communication quality of one or more target wireless access points may be obtained, and then the maximum value of the communication quality selected from the one or more target wireless access points is selected, so that the target wireless access point corresponding to the maximum value of the communication quality is used as the wireless access point to be switched.
In an alternative embodiment, the measurement factors of the communication quality of the target wireless access point include a signal-to-noise ratio and a channel utilization ratio, and the communication quality of the target wireless access point adopts the following formula: q=β SNR target +γ*CU target Wherein β and γ are adjustable factors, added to 1; q is the communication quality of the target wireless access point; SNR of target Signal to noise ratio for the target wireless access point; CU (CU) target Channel utilization for the target wireless access point.
It should be noted that the signal-to-noise ratio affects the communication rate, while the channel utilization affects the chance of having access to the channel, and thus affects the communication delay, both of which affect the throughput per unit time.
In addition, the trigger factors for switching the wireless access point of the wireless terminal to the wireless access point to be switched include: packet loss rate, signal-to-noise ratio, wireless communication distance, etc., wherein the packet loss rate is real-time packet loss rate, and is not historical statistical packet loss rate. Specifically, the maximum packet loss rate, the worst channel ratio and the farthest wireless communication distance of the wireless terminal can be tolerated; wherein the worst channel ratio is less than the signal to noise ratio of the wireless access point to which the primary site is connected.
Optionally, the preset trigger condition includes a threshold trigger and a communication quality gap trigger, wherein the threshold trigger includes at least one of the following: packet loss rate, signal to noise ratio, wireless communication distance, if the wireless access point that the master station is connected meets the preset triggering condition, then switch the wireless access point of the wireless terminal to the wireless access point to be switched, including: if the packet loss rate of the wireless access point connected with the master station is continuously larger than the maximum packet loss rate of the wireless terminal and the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is larger than a first preset value in a preset time range, switching the wireless access point of the wireless terminal to the wireless access point to be switched; if the signal to noise ratio of the wireless access point connected with the master station is continuously smaller than the worst signal to noise ratio of the wireless terminal and the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is larger than a first preset value in a preset time range, switching the wireless access point of the wireless terminal to the wireless access point to be switched; and in the preset time range, if the wireless communication distance between the wireless access point connected with the master station and the master station is continuously larger than the farthest wireless communication distance of the wireless terminal and the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is larger than a first preset value, switching the wireless access point of the wireless terminal to the wireless access point to be switched.
In an alternative embodiment, as the wireless terminal moves away from the wireless access point to which the master station is connected, the wireless communication distance increases, the communication signal-to-noise ratio decreases, and the packet loss rate increases. When the packet loss rate of the communication between the wireless access point connected with the master station and the wireless terminal is continuously larger than the maximum packet loss rate tolerable by the wireless terminal in a preset time range, or the signal to noise ratio of the wireless access point connected with the master station is continuously lower than the worst channel ratio tolerable by the wireless terminal in the preset time range, or the wireless communication distance between the wireless access point connected with the master station and the worst wireless communication distance tolerable by the wireless terminal is continuously larger than the farthest wireless communication distance tolerable by the wireless terminal in the preset time range, if a best wireless access point to be switched can be found, so that the communication quality difference delta Q of the wireless access point to be switched and the wireless access point connected with the master station is more than 0, the wireless access point switching step is entered.
It should be noted that, the first preset value may be 0 or a value close to 0; in the triggering condition, the setting of the preset time can prevent the unstable phenomenon of wireless association repeated transverse jump at the junction of two wireless access point signals of the wireless terminal.
In an optional embodiment, the calculation formula of the communication quality difference between the wireless access point to be switched and the wireless access point connected to the master station is as follows: Δq=β (SNR) target -SNR current )+γ*(CU current -CU target ). The subscript target is the wireless access point to be switched, and the subscript current is the wireless access point connected with the master station. The larger the signal-to-noise ratio, the better, and the smaller the channel utilization. Thus, the larger Δq indicates that the larger the communication quality gap for the wireless terminal of the wireless access point to be handed over to the wireless access point connected to the master station, i.e., the better the wireless access point to be handed over.
Optionally, the preset triggering condition includes communication quality gap triggering, and if the wireless access point connected by the master station point meets the preset triggering condition, switching the wireless access point of the wireless terminal to the wireless access point to be switched, including: and in the preset time range, if the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is continuously larger than a second preset value, switching the wireless access point of the wireless terminal to the wireless access point to be switched.
In an alternative embodiment, if a wireless access point to be handed over can be found, so that the communication quality difference Δq between the wireless access point to be handed over and the wireless access point connected to the master station is greater than a preset value within a preset time range, it indicates that a new wireless access point significantly better for the wireless terminal has been found, and then the behavior of handing over the wireless access point is triggered. Note that, the second preset value is a non-zero value, for example, the value of the second preset value may be 0.5, 1, or the like.
Optionally, switching the wireless access point of the wireless terminal to the wireless access point to be switched includes: and establishing communication connection between the slave station and the wireless access point to be switched, and disconnecting communication connection between the master station and the wireless access point connected with the master station.
In an alternative implementation mode, when the switching of the wireless access points meets the preset triggering condition, the slave station finds the wireless access point to be switched and carries out wireless association with the wireless access point to be switched; after the association action is completed, the master station disconnects the communication connection of the wireless access point connected with the master station, thereby realizing quick switching.
Further, after the fast handover is realized, the slave station becomes the master station, and the master station becomes the slave station, and the above handover procedure is continuously performed.
Example 2
According to another aspect of the embodiment of the present invention, there is also provided a switching device for a wireless access point of a wireless terminal, where the wireless terminal includes a master station and a slave station, and fig. 2 is a schematic diagram of the switching device for the wireless access point of the wireless terminal according to the embodiment of the present invention, and as shown in fig. 2, the switching device for the wireless access point of the wireless terminal includes: a scanning module 22, a determining module 24 and a switching module 26. The following describes in detail a handover device for a wireless access point of the wireless terminal.
The scanning module 22 is configured to scan at least one target wireless access point according to a preset period when the slave station satisfies a preset condition when the master station performs data communication with a wireless access point connected to the master station; a determining module 24, coupled to the scanning module 22, for determining one of the at least one target wireless access point as the wireless access point to be switched; the switching module 26 is connected to the determining module 24, and is configured to switch the wireless access point of the wireless terminal to the wireless access point to be switched if the wireless access point connected by the master station meets a preset trigger condition.
It should be noted that each of the above modules may be implemented by software or hardware, for example, in the latter case, it may be implemented by: the above modules may be located in the same processor; and/or the above modules are located in different processors in any combination.
In the above embodiment, the switching device of the wireless access point of the wireless terminal may utilize a mechanism of coexistence of the master station and the slave station of the wireless terminal, and by scanning at least one target wireless access point according to a preset period when the slave station meets a preset condition, and selecting one from the at least one target wireless access point as the wireless access point to be switched, when the wireless access point connected with the master station meets a preset trigger condition, the wireless access point of the wireless terminal is switched to the wireless access point to be switched, thereby realizing the technical effect that the wireless terminal can switch the wireless access point quickly and efficiently, and further solving the technical problem that the wireless terminal in the prior art cannot realize the switching of the wireless access point efficiently.
Here, the scanning module 22, the determining module 24, and the switching module 26 correspond to steps S102 to S106 in embodiment 1, and the modules are the same as examples and application scenarios implemented by the corresponding steps, but are not limited to those disclosed in embodiment 1.
Optionally, the scanning module 22 includes: the first acquisition unit is used for acquiring the signal-to-noise ratio of the wireless access point connected with the master station; the judging unit is used for judging whether the signal to noise ratio is continuously smaller than a signal to noise ratio threshold value in a preset time; the first processing unit is used for triggering the slave station to scan the target wireless access point in a preset period when the signal-to-noise ratio is continuously smaller than the signal-to-noise ratio threshold; and the second processing unit is used for not triggering the secondary station to scan the target wireless access point in a preset period when the signal-to-noise ratio is continuously greater than or equal to the signal-to-noise ratio threshold value.
Optionally, the first processing unit includes: the detection subunit is used for detecting whether the wireless access point connected with the main station and the main station performs data communication or not in a preset period; the first processing subunit is used for entering a power saving mode when the wireless access point connected with the master station does not perform data communication; the second processing subunit is used for entering a power saving mode after the wireless access point connected with the master station finishes data communication under the condition that the master station and the wireless access point connected with the master station perform data communication; and the third processing subunit is used for switching channels from the station after the master station enters the power saving mode and continuously scanning the target wireless access point.
Optionally, the determining module 24 includes: a second obtaining unit, configured to obtain a communication quality of at least one target wireless access point; a first determining unit configured to determine a maximum value of communication quality in at least one target wireless access point; and the second determining unit is used for determining the target wireless access point corresponding to the maximum value of the communication quality as the wireless access point to be switched.
Optionally, the preset trigger condition includes a threshold trigger and a communication quality gap trigger, wherein the threshold trigger includes at least one of the following: packet loss rate, signal-to-noise ratio, wireless communication distance, the above-mentioned switching module 26 includes: the first switching unit is used for switching the wireless access point of the wireless terminal to the wireless access point to be switched if the packet loss rate of the wireless access point connected with the master station is continuously larger than the maximum packet loss rate of the wireless terminal and the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is larger than a first preset value within a preset time range; the second switching unit is used for switching the wireless access point of the wireless terminal to the wireless access point to be switched if the signal-to-noise ratio of the wireless access point connected with the master station is continuously smaller than the worst signal-to-noise ratio of the wireless terminal and the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is larger than a first preset value within a preset time range; and the third switching unit is used for switching the wireless access point of the wireless terminal to the wireless access point to be switched if the wireless communication distance between the wireless access point connected with the master station and the master station is continuously larger than the farthest wireless communication distance of the wireless terminal and the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is larger than a first preset value within a preset time range.
Optionally, the preset trigger condition includes a communication quality gap trigger, and the switching module 26 includes: and the fourth switching unit is used for switching the wireless access point of the wireless terminal to the wireless access point to be switched if the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is continuously larger than a second preset value within the preset time range.
Optionally, the switching module 26 includes: and the execution unit is used for establishing communication connection between the slave station and the wireless access point to be switched and disconnecting communication connection between the master station and the wireless access point connected with the master station.
Example 3
According to another aspect of the embodiments of the present invention, there is further provided a computer readable storage medium, where the computer readable storage medium includes a stored program, and when the program runs, controls a device in which the computer readable storage medium is located to execute the method for switching the wireless access point of the wireless terminal of any one of the above.
Example 4
According to another aspect of the embodiments of the present invention, there is also provided a processor for executing a program, where the program executes the method for switching a wireless access point of any one of the above wireless terminals.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present invention, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology content may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be 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 with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention 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. The integrated units may be implemented in hardware or in software functional units.
The integrated units, 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 technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (6)
1. A method for switching a wireless access point of a wireless terminal, the wireless terminal including a master station and a slave station, comprising:
when the master station and the wireless access points connected with the master station carry out data communication, the slave station scans at least one target wireless access point according to a preset period under the condition that preset conditions are met;
determining one of at least one target wireless access point as a wireless access point to be switched;
if the wireless access point connected with the master station point meets a preset triggering condition, switching the wireless access point of the wireless terminal to the wireless access point to be switched, and under the condition that the slave station meets the preset condition, scanning at least one target wireless access point according to a preset period, wherein the method comprises the following steps: acquiring the signal-to-noise ratio of a wireless access point connected with the master station; judging whether the signal to noise ratio is continuously smaller than a signal to noise ratio threshold value in a preset time; when the signal-to-noise ratio is continuously smaller than the signal-to-noise ratio threshold, triggering the slave station to scan the target wireless access point in the preset period; and when the signal-to-noise ratio is continuously greater than or equal to the signal-to-noise ratio threshold, not triggering the slave station to scan the target wireless access point in the preset period, and triggering the slave station to scan the target wireless access point in the preset period, including: detecting whether the master station and a wireless access point connected with the master station perform data communication or not in the preset period; under the condition that the wireless access point connected with the main station and the main station does not perform data communication, the main station enters a power saving mode; under the condition that the main station and the wireless access point connected with the main station carry out data communication, after the wireless access point connected with the main station completes data communication, the main station enters a power saving mode; after the master station enters a power saving mode, the slave station switches channels and continues to scan the target wireless access point, wherein the preset trigger condition comprises a threshold trigger and a communication quality gap trigger, and the threshold trigger comprises at least one of the following: packet loss rate, signal to noise ratio, wireless communication distance, if the wireless access point connected with the master station point meets the preset triggering condition, switching the wireless access point of the wireless terminal to the wireless access point to be switched, including: if the packet loss rate of the wireless access point connected with the master station is continuously larger than the maximum packet loss rate of the wireless terminal and the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is larger than a first preset value in a preset time range, switching the wireless access point of the wireless terminal to the wireless access point to be switched; if the signal to noise ratio of the wireless access point connected with the master station is continuously smaller than the worst signal to noise ratio of the wireless terminal and the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is larger than a first preset value in a preset time range, switching the wireless access point of the wireless terminal to the wireless access point to be switched; in a preset time range, if the wireless communication distance between the master station and the wireless access point connected with the master station is continuously greater than the farthest wireless communication distance between the wireless terminal and the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is greater than a first preset value, switching the wireless access point of the wireless terminal to the wireless access point to be switched, wherein the preset triggering condition comprises triggering of the communication quality difference, and if the wireless access point connected with the master station meets the preset triggering condition, switching the wireless access point of the wireless terminal to the wireless access point to be switched comprises: and in a preset time range, if the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is continuously larger than a second preset value, switching the wireless access point of the wireless terminal to the wireless access point to be switched.
2. The method of claim 1, wherein determining one of the at least one target wireless access point to be a wireless access point to be handed off comprises:
acquiring communication quality of at least one target wireless access point;
determining a maximum value of communication quality in at least one of the target wireless access points;
and determining the target wireless access point corresponding to the maximum value of the communication quality as the wireless access point to be switched.
3. The method according to claim 1 or 2, wherein switching the wireless access point of the wireless terminal to the wireless access point to be switched comprises:
and establishing communication connection between the slave station and the wireless access point to be switched, and disconnecting communication connection between the master station and the wireless access point connected with the master station.
4. A switching apparatus of a wireless access point of a wireless terminal, the wireless terminal including a master station and a slave station, comprising:
the scanning module is used for scanning at least one target wireless access point according to a preset period when the slave station meets a preset condition when the master station performs data communication with the wireless access point connected with the master station;
A determining module, configured to determine one of at least one target wireless access point as a wireless access point to be switched;
the switching module is configured to switch the wireless access point of the wireless terminal to the wireless access point to be switched if the wireless access point connected with the master station point meets a preset triggering condition, where the scanning module includes: the first acquisition unit is used for acquiring the signal-to-noise ratio of the wireless access point connected with the master station; the judging unit is used for judging whether the signal to noise ratio is continuously smaller than a signal to noise ratio threshold value in a preset time; the first processing unit is used for triggering the slave station to scan the target wireless access point in a preset period when the signal-to-noise ratio is continuously smaller than the signal-to-noise ratio threshold; the second processing unit is configured to, when the signal-to-noise ratio is continuously greater than or equal to the signal-to-noise ratio threshold, not trigger the secondary station to scan the target wireless access point in a preset period, where the first processing unit includes: the detection subunit is used for detecting whether the wireless access point connected with the main station and the main station performs data communication or not in a preset period; the first processing subunit is used for entering a power saving mode when the wireless access point connected with the master station does not perform data communication; the second processing subunit is used for entering a power saving mode after the wireless access point connected with the master station finishes data communication under the condition that the master station and the wireless access point connected with the master station perform data communication; the third processing subunit is configured to switch a channel from the station after the master station enters the power saving mode, and continuously scan the target wireless access point, where the preset trigger condition includes a threshold trigger and a communication quality gap trigger, and the threshold trigger includes at least one of the following: packet loss rate, signal to noise ratio, wireless communication distance, the switching module includes: the first switching unit is used for switching the wireless access point of the wireless terminal to the wireless access point to be switched if the packet loss rate of the wireless access point connected with the master station is continuously larger than the maximum packet loss rate of the wireless terminal and the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is larger than a first preset value within a preset time range; the second switching unit is used for switching the wireless access point of the wireless terminal to the wireless access point to be switched if the signal-to-noise ratio of the wireless access point connected with the master station is continuously smaller than the worst signal-to-noise ratio of the wireless terminal and the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is larger than a first preset value within a preset time range; the third switching unit is configured to switch the wireless access point of the wireless terminal to the wireless access point to be switched if the wireless communication distance between the wireless access point connected by the master station and the master station is continuously greater than the farthest wireless communication distance between the wireless terminal and the wireless access point to be switched is greater than a first preset value within a preset time range, and the preset triggering condition includes a communication quality difference trigger, where the switching module further includes: and the fourth switching unit is used for switching the wireless access point of the wireless terminal to the wireless access point to be switched if the communication quality difference between the wireless access point to be switched and the wireless access point connected with the master station is continuously larger than a second preset value within the preset time range.
5. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored program, wherein the program, when run, controls a device in which the computer-readable storage medium is located to perform the handover method of the wireless access point of the wireless terminal according to claim 1 or 2.
6. A processor, wherein the processor is configured to run a program, wherein the program when run performs the method of switching wireless access points of wireless terminals according to claim 1 or 2.
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