CN105722075A - Comprehensive WIFI coverage system using road well lids and control method thereof - Google Patents

Comprehensive WIFI coverage system using road well lids and control method thereof Download PDF

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Publication number
CN105722075A
CN105722075A CN201610051749.8A CN201610051749A CN105722075A CN 105722075 A CN105722075 A CN 105722075A CN 201610051749 A CN201610051749 A CN 201610051749A CN 105722075 A CN105722075 A CN 105722075A
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China
Prior art keywords
well lid
wireless network
access point
network access
lid wireless
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CN201610051749.8A
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Chinese (zh)
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CN105722075B (en
Inventor
崔伟
杨震威
张明广
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Conway Communication Technology Co Ltd
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Shandong Conwell Communication Technology Co Ltd
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Priority to CN201610051749.8A priority Critical patent/CN105722075B/en
Publication of CN105722075A publication Critical patent/CN105722075A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W12/00Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06Authentication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18Network planning tools
    • H04W16/20Network planning tools for indoor coverage or short range network deployment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point

Abstract

The invention discloses a comprehensive WIFI coverage system using road well lids and a control method thereof. The system comprises a mobile terminal, well lid wireless network access points, GPON (Gigabit Passive Optical Network) equipment and a management platform, wherein the well lid wireless network access points are arranged at the bottoms of well lids, and a plurality of well lid wireless network access points form a well lid wireless AP (Access Point) coverage network; the well lid wireless network access points are connected to the GPON equipment via an optical network; the GPON equipment is connected to the Internet via a communication operator; and the management platform meets different requirements of different levels by adopting hierarchical management authorities, and manages each well lid wireless network access point via the Internet. The system and the control method can realize comprehensive coverage of WIFI via existing road well lids, solve the problems of signal interference of public areas, user's roaming switching quality among multiple base stations and multi-user data access management, and improve the online experience of users.

Description

A kind of comprehensive covering system of WIFI utilizing road surface manhole and control method thereof
Technical field
The present invention relates to a kind of comprehensive covering system of WIFI utilizing road surface manhole and control method thereof.
Background technology
Current WIFI wireless signal covers the public and private spaces such as family, retail shop, office building, office space, but especially bustling business's the street net demand is not carried out the covering of WIFI on road, the equipment needed for the wireless coverage of road surface installation carrier more than ground only has light pole, advertisement bar or construction wall, but these resources are subject to the impact of property ownership and position mostly cannot realize laying, the dispersion of some position and power supply are difficult.Road surface manhole (containing communication, combustion gas, electric power, sewage, heating power) except threading, access device, personnel's discrepancy, load-bearing, landscaping streets effect except there are very big application and development potentiality in communication overlay, corresponding human manhole cover has raceway groove, pipeline, tunnel to be connected, easily realize the laying of the circuit such as optical fiber, power supply, well lid can realize the installation of wireless transmitting-receiving equipments completely except the effect of self, this just covers the communication resource for wireless network WiFi and provides minimum, the effect of restriction and well lay place, substantially increases the utilization rate of resource.
The well lid distribution that current present status in China is on road is very intensive, signal coverage density is not problem, but at the environment that road is open, and towards be all flowing client, how to solve public territory signal disturbing, the user roaming switch quality between many base stations and multi-user data access-in management problem, how to improve user surf the Net experience (quickly access, network stabilization, roaming continuously, network security) become well lid WIFI and cover the problem needing to solve comprehensively.
Summary of the invention
The present invention is to solve the problems referred to above, propose a kind of comprehensive covering system of WIFI utilizing road surface manhole and control method thereof, the present invention realizes comprehensive covering of WIFI by the existing well lid in road surface, and solve public territory signal disturbing, the user roaming switch quality between many base stations and multi-user data access-in management problem, improve the experience of user's online, it is achieved thereby that comprehensive access of WIFI, network stabilization, roam continuously and network security problem.Because road surface manhole is existing communal facility, the implementation cost of this system and method is low, and signal covers intensive, and environmental effect is little, but broad covered area.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of comprehensive covering system of WIFI utilizing road surface manhole, including mobile terminal, well lid wireless network access access point, network G PON facilities and administration platform, wherein:
Described well lid wireless network access access point is arranged on bottom well lid, multiple well lid wireless network access access points composition well lid wireless aps overlay network;Well lid wireless network access access point accesses network GPON equipment by fiber optic network;GPON equipment is linked into the Internet by common carrier, and management platform adopts multi-zone supervision authority, it is achieved the different demands of different stage, realizes the management to each well lid wireless network access access point by the Internet;
Described mobile terminal, connects well lid wireless aps overlay network.
Described well lid wireless network access access point, is arranged on bottom well lid, is provided with waterproof layer, explosion-protection equipment and alarm, possesses waterproof, explosion-proof, anti-theft feature.
Described well lid wireless network access access point; it is provided with roaming switch management module and high data bandwidth transmission channel; support IEEE802.1X/RADIUSIEEE802.11i security protocol, possess wide temperature Width funtion ability to work, possess surge protection, ESD protection, vibration resistance and IP68 degree of protection.
Further, described roaming switch management module, for well lid wireless network access access point in same LAN by specifying a well lid wireless network access access point to possess fast and safely certificate manager function manually, the wireless terminal authentication information that other well lid wireless network access access points in this network segment access is cached in the well lid wireless network access access point specified by particular encryption, when a mobile terminal switches from a well lid wireless network access access point to target radio network access points, mobile terminal will be rapidly completed the safety certification of wireless network access access point in the overlapping domains of public area by the well lid wireless network access access point specified.
Described well lid wireless network access access point, also has dynamic frequency channel selecting module, and when several strong channel signals being detected, equipment automatically switches on the channel of a low interference.
Described mobile terminal is provided with special APP, for providing the user interface quickly accessing well lid WIFI public network, WIFI module work will be driven, it is automatically performed well lid wireless aps ISSD search, certification, access, control mobile terminal to realize stablizing fast roaming switching between well lid wireless network access access point, it is ensured that the Consumer's Experience that wireless network is good.
Described network G PON equipment, it is based on the wire network devices of fiber optic communication, for providing the reliable and stable network bandwidth, adopt OLT optical line terminal access carrier router, multiple ONU optical network unit is connected by beam splitter, optical network unit realizes the optical signal conversion to the signal of telecommunication, connects wireless industrial AP, forms top-down tree-shaped or Star Network.
Described management platform, for Integrated Service Management Platform, employing multi-zone supervision authority, it is achieved the different demands of different stage;For obtaining non-privacy effective information, generate the big data of marketing, in real time monitoring flow trend, automatically record user preferences and form data sheet, providing better advertisement putting decision analysis for businessman.
A kind of base station control method for switching between based on said system, comprises the following steps:
(1) build optical fiber GPON network, configure well lid wireless network access access point so that AP signal coverage areas should intersect overlap, forms WIFI overlay network;
(2) enabling well lid wireless network access access point and support DFS dynamic frequency channel selecting function, mobile terminal accesses WIFI overlay network;
(3) when the semaphore monitoring mobile terminal decays to setting value, to two or more ISSD of the same name, with password WIFI hot spot, it is attached setting detecting frequency, connect the focus that signal is the strongest, enable roaming switch management module, it is scanned according to the particular channel that the well lid wireless network access access point specified provides, set up the many AP of MAC layer in advance to connect, two aspects of support of mobile terminal, well lid wireless network access access point and wireless network, realize base station internetwork roaming switching.
In described step (1), the standard of configuration well lid wireless network access access point is: AP signal coverage areas should intersect overlap, and all well lid wireless network access access points must use same SSID, it is necessary to adopts identical WEP or WPA to encrypt;All well lid wireless network access access points must use the IP address of the same network segment, and is in same VLAN.
In described step (2), the well lid wireless network access access point mutually covered must adopt different, non-conterminous channel, open the channel quality RSSI of the DFS dynamic frequency multiple frequency channels of channel selecting function monitoring, when one or several strong channel signal being detected, equipment automatically switches on a relatively low channel of applicable interference.
In described step (3), the concrete grammar realizing base station internetwork roaming switching mobile terminal support aspect includes:
(1) set on the APP of mobile terminal and receive signal metric instruction RSSI minimum;
(2) to two or more ISSD of the same name, with password WIFI hot spot, set detecting frequency, connect the focus that signal is the strongest;
(3) setting intensity difference acquiescence be equal setting within threshold value, it is to avoid two focus signal intensitys are close and cause channel switch, remotely update APP;
(4) when APP finds that the AP signal designation RSSI connected substantially reduces, it is scanned according to the particular channel that the well lid wireless network access access point specified provides, sets up the many AP of MAC layer in advance and connect;
(5) user is when switching from an initial well lid wireless network access access point to target radio network access points, if the received signal strength indicator of initial well lid wireless network access access point exceedes less than the RSSI of RSSI minimum or target radio network access points more than the RSSI setting threshold value of initial well lid wireless network access access point, then now have to be off initial well lid wireless network access access point to connect, and target radio network access points is set up and connected.
In described step (3), the concrete grammar realizing base station internetwork roaming switching the support aspect of well lid wireless network access access point and wireless network includes:
(3-1) starting dynamic frequency channel selecting function, detect all channel signals, well lid wireless network access access point automatically switches on a relatively low channel of applicable interference;
(3-2) in same LAN, well lid wireless network access access point is by specifying one to specify well lid wireless network access access point to possess fast and safely certificate manager function manually, and the wireless terminal authentication information that other well lid wireless network access access points in this network segment access is cached in appointment well lid wireless network access access point through particular encryption by Ethernet;
(3-3) when a mobile terminal switches from a well lid wireless network access access point to target radio network access points, mobile terminal will be rapidly completed the safety certification of wireless network access access point in the overlapping domains of public area by the well lid wireless network access access point specified.
In described step (3-1), particularly as follows:
I (), under the situation that just start does not have user side to access after powering on starts, starts Channel assignment, all channel signal strength is ranked up, avoid the channel that signal is strong, selects the most weak channel of signal as the signal covering channel of oneself;
(ii) when system operation occurs channel is identical and signal is strong interference channel, this interference channel is carried out scoring labelling (as the parameters such as signal disturbing intensity, interference period, interference duration carry out scoring accumulation) by system, system is balanced selecting in the most weak two parameters minimum with channel score value of interference channel signal automatically, a relatively reliable and stable passage is selected to cover as signal, avoid the switching repeatedly of channel, cause that user cannot access.
In described step (3-2), if not specifying well lid wireless network access access point in this LAN manually or specifying well lid wireless network access access point to damage, this network segment is all AP meeting auto negotiation, elects the well lid wireless network access access point that in the book network segment, IP address is minimum and continues as fast and safely certificate manager as appointment well lid wireless network access access point.
In described step (3-3), method particularly includes: when a wireless terminal switches another target well lid wireless network access access point from an initial well lid wireless network access access point, wireless terminal will weaken gradually from the initial well lid strong signal coverage areas of wireless network access access point, enter initial well lid wireless network access access point and target well lid wireless network access access point signals overlapping region, mobile terminal is carrying out RSSI signal monitoring always, start the many AP of MAC layer and connect maintenance, when terminal APP threshold values control strategy starts, terminal will carry out safety certification with target well lid wireless network access access point, the authentication information of encryption is transferred to appointment well lid wireless network access access point either directly through Ethernet and carries out quick comparison certification by target well lid wireless network access access point, well lid wireless network access access point is specified to find certification safety information quickly to respond.
The invention have the benefit that
(1) comprehensive covering of WIFI can be realized by the existing well lid in road surface, and solve public territory signal disturbing, the user roaming switch quality between many base stations and multi-user data access-in management problem, improve the experience of user's online, it is achieved thereby that comprehensive access of WIFI, network stabilization, roams continuously and network security problem;
(2) road surface manhole is existing communal facility, so the implementation cost of the present invention is low, signal covers intensive, and environmental effect is little, but broad covered area;
(3) passing through to arrange certification safety information quickly to respond, the whole handoff procedure time, user's almost imperceptible any network data was paused, and substantially increases Consumer's Experience less than 100ms.
Accompanying drawing explanation
Fig. 1 is the system architecture diagram of the present invention;
Fig. 2 is the base station control method for switching between FB(flow block) of the present invention.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the invention will be further described with embodiment.
One utilizes road surface manhole to realize the comprehensive covering system of WIFI, including: special-purpose terminal APP, well lid wireless aps, network G PON equipment, management platform.
One utilizes road surface manhole to realize the comprehensive covering system of WIFI, user uses special-purpose terminal APP, well lid wireless aps overlay network is accessed by rapid authentication service, well lid wireless aps accesses network GPON equipment by fiber optic network, GPON equipment is linked into Internet by common carrier, and management platform realizes the management to well lid wireless aps by Internet network.
Special-purpose terminal APP, it it is family mobile phone, the flat board notebook user interface that quickly accesses well lid WIFI public network, when user terminal is in well lid WIFI covering area range, any individual privacy information need not be inputted by APP, having only to start one-touch internet function, special-purpose terminal APP software will drive WIFI module work, be automatically performed well lid wireless aps ISSD search, certification, access, control terminal and realize the switching of stable fast roaming between the aps, it is ensured that the Consumer's Experience that wireless network is good.
Well lid wireless aps, is arranged on bottom well lid, possesses waterproof, explosion-proof, anti-theft feature.
Well lid wireless aps; band fast roaming handover management function; except supporting IEEE802.11n technology; high data bandwidth transmits; support IEEE802.1X/RADIUSIEEE802.11i security protocol; possess wide temperature Width funtion ability to work, possess surge protection, outside the characteristic such as ESD protection, vibration resistance and IP68 degree of protection;Being also equipped with dynamic frequency channel selecting function, when one or several stronger channel signal being detected, equipment automatically switches on a relatively low channel of applicable interference, improves WIFI signal covering quality.
Fast roaming handover management function, it is exactly that AP can by specifying an AP0 to possess fast and safely certificate manager function manually in same LAN, the wireless terminal authentication information that other AP in this network segment access is cached in appointment AP0 by particular encryption, when a wireless terminal switches another AP2 from an AP1, in wireless terminal, special APP will be rapidly completed AP2 equipment safety certification by AP0 in the overlapping domains of public area, whole switching time < 100ms, avoid user's suspension, improve Consumer's Experience.
Network G PON equipment, is based on the wire network devices of fiber optic communication, it is provided that the reliable and stable network bandwidth.It adopts OLT optical line terminal access carrier router, connects multiple ONU optical network unit by beam splitter, and optical network unit realizes the optical signal conversion to the signal of telecommunication, connects wireless industrial AP, forms top-down tree-shaped or Star Network.
Management platform, for Integrated Service Management Platform, employing multi-zone supervision authority, it is achieved the different demands of different stage;Intelligence obtains non-privacy effective information, and intelligence generates the big data of marketing, in real time monitoring flow trend, automatically records user preferences and forms data sheet, providing better advertisement putting decision analysis for businessman.
A kind of base station control method for switching between utilizing road surface manhole WiFi to cover, comprises the following steps:
Step 1: build optical fiber GPON network
Step 2: build the wireless WIFI overlay network of well lid:
Step 3: enable well lid wireless aps and support DFS dynamic frequency channel selecting function:
Step 4: user accesses well lid WIFI network:
Step 5: user is in the base station internetwork roaming switching that well lid WIFI covers.
Step 1, the same with all PON system, GPON is made up of ONU, OLT and passive optical distribution network, it is possible to well solving Double-strand transmission apart from short, bandwidth is low, the problem that cost is high.
Step 2: well lid wireless aps configuring, AP signal coverage areas should intersect overlap, and this point general distance of domestic road manhole is even more dense less than 50 meters;All wireless apss must use same SSID, it is necessary to adopts identical WEP or WPA to encrypt;All well lid wireless apss must use the IP address of the same network segment, and is in same VLAN.
Step 3, the well lid wireless aps mutually covered must adopt different or even non-conterminous channel, otherwise, will cause severe jamming, reduction well lid wireless aps communication efficiency.Channel is exactly communications band, IEEE802.11b/g is operated in 2400~2483MHz, and Unite States Standard channel (channel) can divide 11, and European standard can divide 13, Nippon Standard can divide 14, differs 11MHz between each channel.Being 2423MHz if channel1 is 2412MHz, channel2, the rest may be inferred.It is true that only entirely without interference between 1,6,11 channels.
For reducing the wireless aps inter-signal interference that public area covers, open the channel quality RSSI of the DFS dynamic frequency multiple frequency channels of channel selecting function monitoring, when one or several stronger channel signal being detected, equipment automatically switches on a relatively low channel of applicable interference, improves AP signal covering quality;Promote user to surf the Net experience.
Step 4: by special-purpose terminal APP, user need not input any individual privacy information, have only to start one-touch internet function, terminal APP software will drive WIFI module work, it is automatically performed wireless aps ISSD search, certification, access, control terminal and realize the switching of stable fast roaming between the aps, it is ensured that the Consumer's Experience that wireless network is good.
Step 5: terminal moves the phenomenon that there is semaphore decay between the aps, and semaphore decays to and to a certain degree then necessarily communication quality impacted, particularly with the real-Time Signal Transfer of audio frequency and video, it is impossible to ensure its signal quality;Need good roaming switch management technique support, it is achieved terminal seamless roam.
Further, roaming switch technology, it is necessary to two ingredient supports: is the support of subscriber terminal equipment aspect.Two is the support of wireless access point AP and wireless network.
1, in subscriber terminal equipment, mainly find a better more stable access point process, realize fast roaming switching by following strategy:
Set in special-purpose terminal APP and receive signal metric instruction RSSI minimum;
To two or more ISSD of the same name, with password WIFI hot spot, set detecting frequency such as 30 times/S, connect the focus that signal is the strongest.
In order to avoid two focus signal intensitys close to and cause channel switch, be equal within setting intensity difference acquiescence 10%, can be adjusted according to field condition, remotely renewal user APP.
When APP finds that the AP signal designation RSSI connected substantially reduces, it is scanned according to the particular channel that AP0 provides, set up the many AP of MAC layer in advance and connect (carrying out, after shortening suspension, the network delay that scan channel brings again), ready for IEEE802.11i certification and connection.
When user switches between AP1 and AP2, if the received signal strength indicator of work AP1 less than the RSSI of RSSI minimum or AP2 more than more than the RSSI10% of AP1 time, then now have to be off AP1 to connect, and new AP2 point is set up and connected, the too rootlet of threshold values is configured according to practical situation.This algorithm both can guarantee that communication quality, can keep away again rabbit and excessively switch continually between the aps, expends the resource of system.
2, wireless access point AP and wireless mesh network aspect, be one recognize client linked a new access point and make necessity adjustment make the data stream of user by the correct process delivering to new access point, fast roaming can be realized by following strategy.
Starting dynamic frequency channel selecting function, when one or several stronger channel signal being detected, equipment automatically switches on a relatively low channel of applicable interference, improves this well lid AP signal coverage areas signal quality, ensures for fast roaming switching.
In same LAN, AP can by specifying an AP0 to possess fast and safely certificate manager function manually, and the wireless terminal authentication information that other AP in this network segment access is cached in appointment AP0 through particular encryption by Ethernet.
If specifying AP0 or AP0 device damage in this LAN manually, this network segment is all AP meeting auto negotiation, and the AP that in the election book network segment, IP address is minimum, as AP0, continues as fast and safely certificate manager.
When a wireless terminal switches another AP2 from an AP1, wireless terminal will weaken gradually from the strong signal coverage areas of AP1, enter AP1 and AP2 signal overlapping region, wireless terminal is carrying out RSSI signal monitoring always, start the many AP of MAC layer and connect maintenance, when terminal APP threshold values control strategy starts, terminal will carry out safety certification with AP2, the authentication information of encryption is transferred to AP0 either directly through Ethernet and carries out quick comparison certification by AP2, AP0 finds certification safety information quickly to respond, the whole handoff procedure time is less than 100ms, user's almost imperceptible any network data is paused, substantially increase Consumer's Experience.
Embodiment one:
As it is shown in figure 1, one utilizes road surface manhole to realize the comprehensive covering system of WIFI, including: special-purpose terminal APP, well lid wireless aps, network G PON equipment, management platform.
User uses special-purpose terminal APP, well lid wireless aps overlay network is accessed by rapid authentication service, well lid wireless aps accesses network GPON equipment by fiber optic network, GPON equipment is linked into Internet by common carrier, and management platform realizes the management to well lid wireless aps by Internet network.
As in figure 2 it is shown, a kind of base station control method for switching between utilizing road surface manhole WiFi to cover, flow process is as follows:
1, optical fiber GPON network is built
The same with all PON system, GPON is made up of ONU, OLT and passive optical distribution network, it is possible to well solving Double-strand transmission apart from short, bandwidth is low, the problem that cost is high.
2, the wireless WIFI overlay network of well lid is built:
Well lid wireless aps configuring, AP signal coverage areas should intersect overlap, and this point general distance of domestic road manhole is even more dense less than 50 meters;All wireless apss must use same SSID, it is necessary to adopts identical WEP or WPA to encrypt;All well lid wireless apss must use the IP address of the same network segment, and is in same VLAN.
2, enable well lid wireless aps and support DFS dynamic frequency channel selecting function:
The well lid wireless aps mutually covered must adopt different or even non-conterminous channel, otherwise, will cause severe jamming, reduction well lid wireless aps communication efficiency.Channel is exactly communications band, IEEE802.11b/g is operated in 2400~2483MHz, and Unite States Standard channel (channel) can divide 11, and European standard can divide 13, Nippon Standard can divide 14, differs 11MHz between each channel.Being 2423MHz if channel1 is 2412MHz, channel2, the rest may be inferred.It is true that only entirely without interference between 1,6,11 channels.
For reducing the wireless aps inter-signal interference that public area covers, open the channel quality RSSI of the DFS dynamic frequency multiple frequency channels of channel selecting function monitoring, when one or several stronger channel signal being detected, equipment automatically switches on a relatively low channel of applicable interference, improves AP signal covering quality;Promote user to surf the Net experience.
4, user accesses well lid WIFI network:
By special-purpose terminal APP, user need not input any individual privacy information, have only to start one-touch internet function, terminal APP software will drive WIFI module work, it is automatically performed wireless aps ISSD search, certification, access, control terminal and realize the switching of stable fast roaming between the aps, it is ensured that the Consumer's Experience that wireless network is good.
5, user is in the base station internetwork roaming switching that well lid WIFI covers.
Terminal moves the phenomenon that there is semaphore decay between the aps, and semaphore decays to and to a certain degree then necessarily communication quality impacted, particularly with the real-Time Signal Transfer of audio frequency and video, it is impossible to ensure its signal quality;Need good roaming switch management technique support, it is achieved terminal seamless roam.
Roaming switch technology, it is necessary to two ingredient supports: one is the support of subscriber terminal equipment aspect.Two is the support of wireless access point AP and wireless network.
A: in subscriber terminal equipment, mainly finds a better more stable access point process, realizes fast roaming switching by following strategy:
Set in special-purpose terminal APP and receive signal metric instruction RSSI minimum;
To two or more ISSD of the same name, with password WIFI hot spot, set detecting frequency such as 30 times/S, connect the focus that signal is the strongest.
In order to avoid two focus signal intensitys close to and cause channel switch, be equal within setting intensity difference acquiescence 10%, can be adjusted according to field condition, remotely renewal user APP.
When APP finds that the AP signal designation RSSI connected substantially reduces, it is scanned according to the particular channel that AP0 provides, set up the many AP of MAC layer in advance and connect (carrying out, after shortening suspension, the network delay that scan channel brings again), ready for IEEE802.11i certification and connection.
When user switches between AP1 and AP2, if the received signal strength indicator of work AP1 less than the RSSI of RSSI minimum or AP2 more than more than the RSSI10% of AP1 time, then now have to be off AP1 to connect, and new AP2 point is set up and connected, the too rootlet of threshold values is configured according to practical situation.This algorithm both can guarantee that communication quality, can keep away again rabbit and excessively switch continually between the aps, expends the resource of system.
B: wireless access point AP and wireless mesh network aspect, be one recognize client linked a new access point and make necessity adjustment make the data stream of user by the correct process delivering to new access point, fast roaming can be realized by following strategy.
Starting dynamic frequency channel selecting function, when one or several stronger channel signal being detected, equipment automatically switches on a relatively low channel of applicable interference, improves this well lid AP signal coverage areas signal quality, ensures for fast roaming switching.
In same LAN, AP can by specifying an AP0 to possess fast and safely certificate manager function manually, and the wireless terminal authentication information that other AP in this network segment access is cached in appointment AP0 through particular encryption by Ethernet.
If specifying AP0 or AP0 device damage in this LAN manually, this network segment is all AP meeting auto negotiation, and the AP that in the election book network segment, IP address is minimum, as AP0, continues as fast and safely certificate manager.
When a wireless terminal switches another AP2 from an AP1, wireless terminal will weaken gradually from the strong signal coverage areas of AP1, enter AP1 and AP2 signal overlapping region, wireless terminal is carrying out RSSI signal monitoring always, start the many AP of MAC layer and connect maintenance, when terminal APP threshold values control strategy starts, terminal will carry out safety certification with AP2, the authentication information of encryption is transferred to AP0 either directly through Ethernet and carries out quick comparison certification by AP2, AP0 finds certification safety information quickly to respond, the whole handoff procedure time is less than 100ms, user's almost imperceptible any network data is paused, substantially increase Consumer's Experience.
The specific embodiment of the present invention is described in conjunction with accompanying drawing although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme, those skilled in the art need not pay various amendments or deformation that creative work can make still within protection scope of the present invention.

Claims (10)

1. utilize the comprehensive covering system of WIFI of road surface manhole, it is characterized in that: include mobile terminal, well lid wireless network access access point, network G PON facilities and administration platform, wherein:
Described well lid wireless network access access point is arranged on bottom well lid, multiple well lid wireless network access access points composition well lid wireless aps overlay network;Well lid wireless network access access point accesses network GPON equipment by fiber optic network;GPON equipment is linked into the Internet by common carrier, and management platform adopts multi-zone supervision authority, it is achieved the different demands of different stage, realizes the management to each well lid wireless network access access point by the Internet;
Described mobile terminal, connects well lid wireless aps overlay network.
2. a kind of comprehensive covering system of WIFI utilizing road surface manhole as claimed in claim 1, is characterized in that: described well lid wireless network access access point, is arranged on bottom well lid, is provided with waterproof layer, explosion-protection equipment and alarm.
3. a kind of comprehensive covering system of WIFI utilizing road surface manhole as claimed in claim 1, is characterized in that:
Described network G PON equipment, it is based on the wire network devices of fiber optic communication, for providing the reliable and stable network bandwidth, adopt OLT optical line terminal access carrier router, multiple ONU optical network unit is connected by beam splitter, optical network unit realizes the optical signal conversion to the signal of telecommunication, connects wireless industrial AP, forms top-down tree-shaped or Star Network.
4., based on the base station control method for switching between of the system as claimed in claim 1, it is characterized in that: comprise the following steps:
(1) build optical fiber GPON network, configure well lid wireless network access access point so that AP signal coverage areas should intersect overlap, forms WIFI overlay network;
(2) enabling well lid wireless network access access point and support DFS dynamic frequency channel selecting function, mobile terminal accesses WIFI overlay network;
(3) when the semaphore monitoring mobile terminal decays to setting value, to two or more ISSD of the same name, with password WIFI hot spot, it is attached setting detecting frequency, connect the focus that signal is the strongest, enable roaming switch management module, it is scanned according to the particular channel that the well lid wireless network access access point specified provides, set up the many AP of MAC layer in advance to connect, two aspects of support of mobile terminal, well lid wireless network access access point and wireless network, realize base station internetwork roaming switching.
5. base station control method for switching between as claimed in claim 4, it is characterized in that: in described step (1), the standard of configuration well lid wireless network access access point is: AP signal coverage areas should intersect overlap, all well lid wireless network access access points must use same SSID, it is necessary to adopts identical WEP or WPA to encrypt;All well lid wireless network access access points must use the IP address of the same network segment, and is in same VLAN.
6. base station control method for switching between as claimed in claim 4, it is characterized in that: in described step (2), the well lid wireless network access access point mutually covered must adopt different, non-conterminous channel, open the channel quality RSSI of the DFS dynamic frequency multiple frequency channels of channel selecting function monitoring, when one or several strong channel signal being detected, equipment automatically switches on a relatively low channel of applicable interference.
7. base station control method for switching between as claimed in claim 4, is characterized in that: in described step (3), and the concrete grammar realizing base station internetwork roaming switching mobile terminal support aspect includes:
(1) set on the APP of mobile terminal and receive signal metric instruction RSSI minimum;
(2) to two or more ISSD of the same name, with password WIFI hot spot, set detecting frequency, connect the focus that signal is the strongest;
(3) setting intensity difference acquiescence be equal setting within threshold value, it is to avoid two focus signal intensitys are close and cause channel switch, remotely update APP;
(4) when APP finds that the AP signal designation RSSI connected substantially reduces, it is scanned according to the particular channel that the well lid wireless network access access point specified provides, sets up the many AP of MAC layer in advance and connect;
(5) user is when switching from an initial well lid wireless network access access point to target radio network access points, if the received signal strength indicator of initial well lid wireless network access access point exceedes less than the RSSI of RSSI minimum or target radio network access points more than the RSSI setting threshold value of initial well lid wireless network access access point, then now have to be off initial well lid wireless network access access point to connect, and target radio network access points is set up and connected.
8. base station control method for switching between as claimed in claim 4, is characterized in that: in described step (3), and the concrete grammar realizing base station internetwork roaming switching the support aspect of well lid wireless network access access point and wireless network includes:
(3-1) starting dynamic frequency channel selecting function, detect all channel signals, well lid wireless network access access point automatically switches on a relatively low channel of applicable interference;
(3-2) in same LAN, well lid wireless network access access point is by specifying one to specify well lid wireless network access access point to possess fast and safely certificate manager function manually, and the wireless terminal authentication information that other well lid wireless network access access points in this network segment access is cached in appointment well lid wireless network access access point through particular encryption by Ethernet;
(3-3) when a mobile terminal switches from a well lid wireless network access access point to target radio network access points, mobile terminal will be rapidly completed the safety certification of wireless network access access point in the overlapping domains of public area by the well lid wireless network access access point specified.
9. base station control method for switching between as claimed in claim 8, it is characterized in that: in described step (3-2), if not specifying well lid wireless network access access point in this LAN manually or specifying well lid wireless network access access point to damage, this network segment is all AP meeting auto negotiation, elects the well lid wireless network access access point that in the book network segment, IP address is minimum and continues as fast and safely certificate manager as appointment well lid wireless network access access point.
10. base station control method for switching between as claimed in claim 8, it is characterized in that: in described step (3-3), method particularly includes: when a wireless terminal switches another target well lid wireless network access access point from an initial well lid wireless network access access point, wireless terminal will weaken gradually from the initial well lid strong signal coverage areas of wireless network access access point, enter initial well lid wireless network access access point and target well lid wireless network access access point signals overlapping region, mobile terminal is carrying out RSSI signal monitoring always, start the many AP of MAC layer and connect maintenance, when terminal APP threshold values control strategy starts, terminal will carry out safety certification with target well lid wireless network access access point, the authentication information of encryption is transferred to appointment well lid wireless network access access point either directly through Ethernet and carries out quick comparison certification by target well lid wireless network access access point, well lid wireless network access access point is specified to find certification safety information quickly to respond.
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