CN103686896B - The changing method of WAP and terminal - Google Patents

The changing method of WAP and terminal Download PDF

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CN103686896B
CN103686896B CN201310681756.2A CN201310681756A CN103686896B CN 103686896 B CN103686896 B CN 103686896B CN 201310681756 A CN201310681756 A CN 201310681756A CN 103686896 B CN103686896 B CN 103686896B
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terminal
signal intensity
moving process
mac address
location information
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CN103686896A (en
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刘靖
李海玉
陈晋辉
龚小聪
廖红中
刘粤
黄桂烽
张海涛
李健能
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Guangzhou Metro Group Co Ltd
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Guangzhou Metro Corp
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Abstract

The present invention provides changing method and the terminal of a kind of WAP, and method includes: terminal detects the network information of the multiple wireless access point AP that can associate near it in moving process by the website being arranged in terminal; Whether the signal intensity of the AP that terminal judges currently associates with website is lower than network signal intensity threshold value; If so, then terminal searches the geographical location information that in multiple AP, the described MAC Address of each AP is corresponding in MAC Address mapping table; Terminal determines, according to the geographical location information that each AP is corresponding, multiple 2nd AP that terminal is close to each other with its geographical position in moving process, and from an AP, website is switched to the 2nd AP that multiple 2nd AP, network signal intensity is the strongest. The embodiment of the present invention effectively solves in prior art, and the technical problem of network chain rupture easily occurs in the process carrying out AP switching in the WiFi of train-ground communication.

Description

The changing method of WAP and terminal
Technical field
The present invention relates to information technology, particularly relate to changing method and the terminal of a kind of WAP.
Background technology
At present, WiFi is increasingly becoming onboard wireless and accesses one of potential desirable technique because of its application popularization, the advantage such as with low cost.
In prior art, the WiFi network being applied to train-ground communication switches over according to signal intensity, i.e. WAP (the AccessPoint of the currently association of the vehicle-mounted website (Station) on car-mounted terminal, AP) signal intensity is very low, and connec-tionless network by this AP cannot use time, other AP around vehicle-mounted station scans, and select the AP that signal is the strongest to be associated. But, in above-mentioned AP handoff procedure, it is likely that occur because access point switches the network chain breaking problem caused not in time.
Summary of the invention
The present invention provides changing method and the terminal of a kind of WAP, is used for solving in prior art, easily occurs the technical problem of network chain rupture in the process carrying out AP switching for the WiFi of train-ground communication.
On the one hand, the embodiment of the present invention provides the changing method of a kind of WAP, including:
Terminal detects the network information of the multiple wireless access point AP that can associate near it in moving process by the website being arranged in described terminal; The network information of described AP includes the network signal intensity of described AP and the MAC address of described AP;
Whether the signal intensity of the AP that described terminal judges currently associates with described website is lower than network signal intensity threshold value;
If the signal intensity of the AP currently associated with described website described in described terminal judges is lower than network signal intensity threshold value, then described terminal searches the geographical location information that in the plurality of AP, the described MAC Address of each AP is corresponding in MAC Address mapping table;
Described terminal determines, according to the described geographical location information that each described AP is corresponding, multiple 2nd AP that described terminal is close to each other with its geographical position in moving process, and from a described AP, described website is switched to the 2nd AP that network signal intensity described in the plurality of 2nd AP is the strongest.
On the other hand, the embodiment of the present invention provides a kind of terminal, including:
Website, detects the network information of the multiple wireless access point AP that can associate near it for terminal in moving process; The network information of described AP includes the network signal intensity of described AP and the MAC address of described AP;
Judge module, for judging that whether the signal intensity of an AP that current and described website associates is lower than network signal intensity threshold value;
Search module, for searching the geographical location information that in the plurality of AP, the described MAC Address of each AP is corresponding in MAC Address mapping table;
Processing module, determine, for the described geographical location information corresponding according to each described AP, multiple 2nd AP that described terminal is close to each other with its geographical position in moving process, and control described website and be switched to, from a described AP, the 2nd AP that network signal intensity described in the plurality of 2nd AP is the strongest.
The changing method of WAP provided by the invention and terminal, terminal detects the network information of the multiple wireless access point AP that can associate near it in moving process by the website being arranged in terminal; The network information of this AP includes the network signal intensity of AP and the MAC address of AP; Whether the signal intensity of the AP that terminal judges currently associates with website is lower than network signal intensity threshold value; If the signal intensity of the AP that terminal judges currently associates with website is lower than network signal intensity threshold value, then terminal searches the geographical location information that in multiple AP, the described MAC Address of each AP is corresponding in MAC Address mapping table; Terminal determines, according to the geographical location information that each AP is corresponding, multiple 2nd AP that terminal is close to each other with its geographical position in moving process, and from an AP, website is switched to the 2nd AP that multiple 2nd AP, network signal intensity is the strongest. The stability that the program is effectively increased in train-ground communication WiFi network connects when carrying out AP switching.
Accompanying drawing explanation
Fig. 1 is the flow chart of one embodiment of changing method of WAP provided by the invention;
Fig. 2 is the structural representation of one embodiment of terminal provided by the invention.
Detailed description of the invention
Fig. 1 is the flow chart of one embodiment of changing method of WAP provided by the invention. The executive agent of the following steps of the method can be move and have the terminal of radio communication function under necessarily high speed of being everlasting such as mobile unit etc. As it is shown in figure 1, the changing method of this WAP:
S101, terminal detects the network information of the multiple wireless access point AP that can associate near it in moving process by the website being arranged in terminal; The network information of this AP includes the network signal intensity of AP and the MAC address of AP;
Locomotive in traveling, the terminal related in this case can be the car-mounted terminal for wireless WiFi communication installed on locomotive, and this terminal moves with necessarily high speed along with the traveling of locomotive. One or more website (Station) for accessing ground AP it is provided with in this car-mounted terminal. Locomotive is in traveling process, this website S can be periodically detected the network information (not including the network information of the AP currently associated) scanning the multiple AP that can associate near it, the media interviews of network signal intensity and this AP that the network information of each AP specifically can include current network website S this AP that can detect that control (MediaAccessControl, MAC) address.Car-mounted terminal can real-time query and manage the above-mentioned network information of the currently detected AP associated of website S by Simple Network Management Protocol (SimpleNetworkManagementProtocol, SNMP).
S102, whether the signal intensity of the AP that terminal judges currently associates with website is lower than network signal intensity threshold value;
In locomotive traveling process, terminal can also the above-mentioned network information of an AP that currently associates of real-time query and management website S, and judge the magnitude relationship of the signal intensity in the network information of an AP and network signal intensity threshold value. Whether this network signal intensity threshold value can normally access for the network signal intensity characterizing current AP and can carry out a network signal threshold value of normal Network. Those skilled in the art are it is believed that can not carry out normal network communications lower than the network signal of this network signal intensity threshold value or communication quality is very poor.
S103, if the signal intensity of the current AP associated with website of terminal judges is lower than network signal intensity threshold value, then terminal searches the geographical location information that in above-mentioned multiple AP, the MAC Address of each AP is corresponding in MAC Address mapping table;
When terminal judges goes out the signal intensity of the AP currently associated with website lower than network signal intensity threshold value, when namely being no longer appropriate for proceeding to communicate by the AP current network signal accessed, terminal will search the geographical location information that in the above-mentioned website S multiple AP associated detected, the MAC Address of each AP is corresponding in MAC Address mapping table. Wherein, this MAC Address mapping table has prestored the MAC Address of all AP in wireless network and the actual geographic positional information that each MAC Address is corresponding. This geographical location information is specifically represented by this geographical position corresponding global positioning system (GlobalPositioningSystem, GPS) defined location coordinate.
S104, terminal determines, according to the geographical location information that each AP is corresponding, multiple 2nd AP that terminal is close to each other with its geographical position in moving process, and from an AP, website is switched to the 2nd AP that multiple 2nd AP, network signal intensity is the strongest;
Terminal is according to the website S geographical location information corresponding for multiple AP that currently can associate detected, and the driving information of present terminal place locomotive, as the information such as current driving location, travel direction judges in the above-mentioned multiple AP associated, which is the AP that terminal is close to each other with the geographical position of terminal in moving process. In other words, namely which AP is in terminal moving process, more and more nearer with the distance of terminal. AP increasingly nearer for these distance terminals is defined as the 2nd AP by terminal.
It is also apart from the nearest AP of described terminal that terminal picks out the strongest AP of the 2nd the strongest usual network signal intensity of AP(of network signal intensity from above-mentioned multiple 2nd AP), and by website from an above-mentioned AP is switched to the 2nd AP, so that before network signal chain rupture between website and an AP, in time website is carried out access point switching, it is to avoid chain rupture.
Further, the present embodiment gives in step 104, and terminal determines a kind of specific implementation of terminal multiple 2nd AP close to each other with its geographical position in moving process according to the geographical location information that each AP is corresponding, and step is as follows:
1. terminal searches in this moving process the geographical location information that the MAC Address of all AP relating to switching is corresponding in MAC Address mapping table;
Terminal is all recorded when the historical data of the AP switching associated in time traveling in locomotive driving process each time, and this historical data includes the MAC Address of each switching AP. Terminal is searched in the MAC Address mapping table pre-set and is related to this terminal geographical location information that the MAC Address of all switching AP is corresponding in moving process, the geographical location information that namely MAC Address of the AP in all historical datas is corresponding.
2. the geographical location information relating to all AP of switching in this moving process is associated by terminal by the transfer sequence of an AP, it is determined that terminal moving direction in this moving process;
Terminal, in each moving process, all can be recorded the AP of association or switching every time, and the above-mentioned network information of these AP is recorded history of forming data. After terminal determines the geographical location information of each AP according to the MAC Address of all AP relating to switching in this moving process, these geographical position are associated, such as the mobile route being attached its transfer sequence can be obtained by terminal in this moving process by website S in terminal, and then obtain the moving direction that terminal is current.
3. terminal is defined as current geographic position information by relating to the geographical location information that in all AP of switching, the MAC Address of an AP of last switching is corresponding in this moving process; Wherein, an AP of this switching for the last time can be understood as the AP currently associated with website.
4. the terminal geographical location information according to each AP, and terminal moving direction in this moving process and current geographic position information determine multiple twoth APs close to each other on geographical position with terminal;
Determine its current moving direction and current geographic position when terminal after, it is determined which is the AP close to each other with in the current moving process of terminal on geographical position in the AP associated that detects of website S, namely along with the movement of terminal, these AP distance terminals are more and more nearer.
Further, above-mentioned MAC Address mapping table further comprises router address information corresponding for each AP; When terminal determines, according to the geographical location information of each AP, multiple 2nd AP that terminal is close to each other with its geographical position in moving process, and by website S from after an AP is switched to the 2nd AP that multiple 2nd AP, network signal intensity is the strongest, terminal searches the router address information of the 2nd AP in MAC Address mapping table. Terminal, according to the 2nd router address information corresponding for AP, adds corresponding routing rule; Then, to carry out information by the 2nd corresponding for AP router and the respective server controlling ground network mutual for terminal, it is achieved proper communication.
The changing method of WAP provided by the invention, terminal detects the network information of the multiple wireless access point AP that can associate near it in moving process by the website being arranged in terminal; The network information of this AP includes the network signal intensity of AP and the MAC address of AP; Whether the signal intensity of the AP that terminal judges currently associates with website is lower than network signal intensity threshold value; If the signal intensity of the AP that terminal judges currently associates with website is lower than network signal intensity threshold value, then terminal searches the geographical location information that in multiple AP, the described MAC Address of each AP is corresponding in MAC Address mapping table; Terminal determines, according to the geographical location information that each AP is corresponding, multiple 2nd AP that terminal is close to each other with its geographical position in moving process, and from an AP, website is switched to the 2nd AP that multiple 2nd AP, network signal intensity is the strongest.The stability that the program is effectively increased in train-ground communication WiFi network connects when carrying out AP switching.
One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can be completed by the hardware that programmed instruction is relevant. Aforesaid program can be stored in a computer read/write memory medium. This program upon execution, performs to include the step of above-mentioned each embodiment of the method; And aforesaid storage medium includes: the various media that can store program code such as ROM, RAM, magnetic disc or CDs.
Fig. 2 is the structural representation of one embodiment of terminal provided by the invention, and this terminal can be move and have the terminal of radio communication function under necessarily high speed of being everlasting such as mobile unit etc., it is possible to performing method step as shown in Figure 1, this terminal includes:
Website 21, detects the network information of the multiple wireless access point AP that can associate near it for terminal in moving process; The network information of this AP includes the network signal intensity of AP and the MAC address of AP;
Whether judge module 22, be used for the signal intensity judging the AP currently associated with website lower than network signal intensity threshold value;
Search module 23, for searching the geographical location information that in multiple AP, the MAC Address of each AP is corresponding in MAC Address mapping table;
Processing module 24, for determining, according to the geographical location information that each AP is corresponding, multiple 2nd AP that terminal is close to each other with its geographical position in moving process;
Website 21, is additionally operable to be switched to, from an AP, the 2nd AP that multiple 2nd AP, network signal intensity is the strongest.
Specifically, the process of the changing method that terminal shown in the present embodiment realizes set WAP is:
Terminal is in moving process, and website 21 detects the network information of the multiple wireless access point AP that can associate near it; The network information of this AP includes the network signal intensity of AP and the MAC address of AP; This detection process specifically can referring to the corresponding contents of step 101;
While terminal moves, it is judged that module 22 judges that whether the signal intensity of the AP currently associated with website 21 is lower than network signal intensity threshold value; This judge process specifically can referring to the corresponding contents of step 102;
If judge module 22 judges that the signal intensity of the AP currently associated with website 21 is lower than network signal intensity threshold value, then search module 23 in MAC Address mapping table, search the geographical location information that in multiple AP that above-mentioned website 21 detects, the MAC Address of each AP is corresponding; This search procedure specifically can referring to the corresponding contents of step 103;
Processing module 24 determines multiple 2nd AP that terminal is close to each other with its geographical position in moving process according to searching the geographical location information corresponding for each AP that finds of module 23, and controls website 21 and be switched to, from an AP, the 2nd AP that multiple 2nd AP, network signal intensity is the strongest; This processing procedure specifically can referring to the corresponding contents of step 104.
Further, processing module 24 determines, according to the geographical location information that each AP is corresponding, multiple 2nd AP that terminal is close to each other with its geographical position in moving process, including:
MAC Address mapping table is searched the geographical location information that the MAC Address of all AP relating to switching in this moving process is corresponding;
The geographical location information relating to all AP of switching in this moving process is associated by the transfer sequence of an AP, it is determined that terminal moving direction in this moving process;
It is defined as current geographic position information by this moving process relates to the geographical location information that in all AP of switching, the MAC Address of an AP of last switching is corresponding;
Geographical location information according to each AP, and terminal moving direction in this moving process and current geographic position information, it is determined that multiple twoth APs close to each other on geographical position with terminal.
According to the geographical location information that each AP is corresponding, above-mentioned processing module 24 determines that the concrete steps content of terminal multiple 2nd AP close to each other with its geographical position in moving process can referring to the corresponding contents of embodiment as shown in Figure 1, its step principle is repeated no more by the present embodiment.
Further, above-mentioned MAC Address mapping table also includes: the router address information corresponding with AP;
Processing module 24, it is additionally operable to determining, according to the geographical location information of each AP, multiple 2nd AP that terminal is close to each other with its geographical position in moving process, and by website from after an AP is switched to the 2nd AP that multiple 2nd AP, network signal intensity is the strongest, according to the 2nd corresponding for the AP router address information that network signal intensity is the strongest, add corresponding routing rule, so that terminal carries out proper communication in the wireless network by the 2nd corresponding for AP router.
Terminal provided by the invention, detects the network information of the multiple wireless access point AP that can associate near it in moving process by the website that is arranged in terminal; The network information of this AP includes the network signal intensity of AP and the MAC address of AP; Whether the signal intensity of the AP that terminal judges currently associates with website is lower than network signal intensity threshold value; If the signal intensity of the AP that terminal judges currently associates with website is lower than network signal intensity threshold value, then terminal searches the geographical location information that in multiple AP, the described MAC Address of each AP is corresponding in MAC Address mapping table; Terminal determines, according to the geographical location information that each AP is corresponding, multiple 2nd AP that terminal is close to each other with its geographical position in moving process, and from an AP, website is switched to the 2nd AP that multiple 2nd AP, network signal intensity is the strongest. The stability that the program is effectively increased in train-ground communication WiFi network connects when carrying out AP switching.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit; Although the present invention being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technical characteristic is carried out equivalent replacement; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.

Claims (6)

1. the changing method of a WAP, it is characterised in that including:
Terminal detects the network information of the multiple wireless access point AP that can associate near it in moving process by the website being arranged in described terminal; The network information of described AP includes the network signal intensity of described AP and the MAC address of described AP;
Whether the signal intensity of the AP that described terminal judges currently associates with described website is lower than network signal intensity threshold value;
If the signal intensity of the AP currently associated with described website described in described terminal judges is lower than network signal intensity threshold value, then described terminal searches the geographical location information that in the plurality of AP, the described MAC Address of each AP is corresponding in MAC Address mapping table;
Described terminal determines, according to the described geographical location information that each described AP is corresponding, multiple 2nd AP that described terminal is close to each other with its geographical position in moving process, and from a described AP, described website is switched to the 2nd AP that network signal intensity described in the plurality of 2nd AP is the strongest;
Wherein, described terminal determines, according to the geographical location information of each described AP, multiple 2nd AP that described terminal is close to each other with its geographical position in moving process, including:
Described terminal searches the geographical location information that the described MAC Address of an all described AP relating to switching in this moving process is corresponding in described MAC Address mapping table;
The described geographical location information relating to an all described AP of switching in this moving process described is associated by described terminal by the transfer sequence of a described AP, it is determined that described terminal moving direction in this moving process;
Described terminal is defined as current geographic position information by relating to the geographical location information that in all described AP of switching, the described MAC Address of a described AP of last switching is corresponding in this moving process described;
The described terminal geographical location information according to each described AP, and described terminal moving direction in this moving process described and described current geographic position information, it is determined that multiple twoth APs close to each other on geographical position with described terminal.
2. method according to claim 1, it is characterised in that also include in described MAC Address mapping table: the router address information corresponding with described AP;
Described terminal determines, according to the geographical location information of each described AP, multiple 2nd AP that described terminal is close to each other with its geographical position in moving process, and by described website from after a described AP is switched to the 2nd AP that network signal intensity described in the plurality of 2nd AP is the strongest, also including:
Described terminal is according to the strongest the 2nd corresponding for the AP router address information of described network signal intensity, add corresponding routing rule, so that described terminal carries out proper communication in the wireless network by the 2nd corresponding for the AP router that described network signal intensity is the strongest.
3. method according to claim 2, it is characterised in that the described website arranged in described terminal is one or more.
4. a terminal, it is characterised in that including:
Website, detects the network information of the multiple wireless access point AP that can associate near it for terminal in moving process; The network information of described AP includes the network signal intensity of described AP and the MAC address of described AP;
Judge module, for judging that whether the signal intensity of an AP that current and described website associates is lower than network signal intensity threshold value;
Search module, for searching the geographical location information that in the plurality of AP, the described MAC Address of each AP is corresponding in MAC Address mapping table;
Processing module, determine, for the described geographical location information corresponding according to each described AP, multiple 2nd AP that described terminal is close to each other with its geographical position in moving process, and control described website and be switched to, from a described AP, the 2nd AP that network signal intensity described in the plurality of 2nd AP is the strongest;
Wherein, described processing module determines, according to the described geographical location information that each described AP is corresponding, multiple 2nd AP that described terminal is close to each other with its geographical position in moving process, including:
Described MAC Address mapping table is searched in this moving process the described geographical location information that the described MAC Address of all described AP relating to switching is corresponding;
The described geographical location information relating to an all described AP of switching in this moving process described is associated by the transfer sequence of a described AP, it is determined that described terminal moving direction in this moving process;
It is defined as current geographic position information by this moving process described relates to the geographical location information that in all described AP of switching, the described MAC Address of a described AP of last switching is corresponding;
Geographical location information according to each described AP, and described terminal moving direction in this moving process described and described current geographic position information, it is determined that multiple twoth APs close to each other on geographical position with described terminal.
5. terminal according to claim 4, it is characterised in that also include in described MAC Address mapping table: the router address information corresponding with described AP;
Described processing module, it is additionally operable to the twoth AP corresponding router address information the strongest according to described network signal intensity, add corresponding routing rule, so that described terminal carries out proper communication in the wireless network by the 2nd corresponding for the AP router that described network signal intensity is the strongest.
6. terminal according to claim 5, it is characterised in that the described website arranged in described terminal is one or more.
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