CN101668293A - Control method and system of network access authority in WLAN - Google Patents
Control method and system of network access authority in WLAN Download PDFInfo
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- CN101668293A CN101668293A CN200910180724A CN200910180724A CN101668293A CN 101668293 A CN101668293 A CN 101668293A CN 200910180724 A CN200910180724 A CN 200910180724A CN 200910180724 A CN200910180724 A CN 200910180724A CN 101668293 A CN101668293 A CN 101668293A
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Abstract
The invention discloses a control method and a system of the network access authority in a WLAN. Wherein, the control method comprises the steps of obtaining wireless signal intensity information RSSIwhich is obtained by measuring a plurality of emission signals of AP of a terminal, carrying out matching with preset position information data and determining the physical position of the terminal;and further obtaining the authority which corresponds to the physical position, and generating the corresponding strategy according to the authority for controlling the network access authority of theterminal. The use of the control method and the system can realize the control of the network access authority of the terminal based on the physical position located by the terminal in the WLAN.
Description
Technical field
The present invention relates to communication technique field, relate in particular to the control method and the system of accesses network authority among a kind of WLAN.
Background technology
In the scene of a kind of common network control of the prior art, need control in the authority of different location accesses network visiting personnel and formal employee.For example: for the visiting personnel in the company, wish that the visiting personnel of control can only visit exterior I nternet network in reception room, can not the visited company internal network; And visiting personnel can't visit any network in the Office Area outside reception room.For the formal employee in the company, wish that the formal employee of control can visit the resource in the internal network in the Office Area, but can not visit exterior I nternet network.By above-mentioned control, reduce the risk of network security.
In the prior art, usually use wireline equipment such as switch, router etc. as access device, access device is deployed in different zones, dispose at access device in advance, different access interface on the access device are carried out right assignment, control being positioned at thus without the authority that different access interface are connected to the user terminal access network of access device of passing through in place.
Problems of the prior art are, the deployment complexity of wireline equipment and network, and also may exist the private of network interface to connect problem, can't really control the position and the authority of different user access network; And access device need be supported special function, has increased use cost.In addition, along with popularizing of WLAN (Wireless LocalArea Network, WLAN (wireless local area network)), increasing user uses WLAN online, office, uses the needs that can not satisfy network control based on the control method of wireline equipment.
Summary of the invention
The invention provides the control method and the system of accesses network authority among a kind of WLAN, be used at WLAN the authority of user terminal access network being controlled according to the identity of user terminal and the place at place.
The invention provides the control method of accesses network authority among a kind of WLAN (wireless local area network) WLAN, be applied to comprise among the WLAN of terminal, location service function entity, policy service functional entity and a plurality of AP, described terminal inserts AP by one among described a plurality of AP and inserts described WLAN, and described method comprises:
Described location service function entity obtains the wireless signal strength information RSSI that terminal measures transmitting of a plurality of AP;
Described positioning function service entities mates described a plurality of AP and corresponding RSSI with the location information data of presetting, determine the physical location of described terminal and notify described policy service functional entity;
Described policy service functional entity from default authority and positional information corresponding relation, obtains the authority of described terminal according to the physical location of described terminal;
The access AP that described policy service functional entity will the control strategy corresponding with the authority of described terminal sends to described terminal controls the authority of described terminal access network.
Wherein, default location information data is specially in the described positioning function service entities:
In the zone that WLAN covers, according to default sampling location, place terminal in each sampling location transmitting of a plurality of AP measured, obtain the RSSI of each AP correspondence;
According to described measurement result,, write down the RSSI that from each sampling location transmitting of described AP is measured in the described zone for each AP; To write down the result is stored in the described positioning function service entities as location information data.
Wherein, described location service function entity also comprises before obtaining the wireless signal strength information RSSI that terminal measures transmitting of a plurality of AP:
The access AP of described terminal sends message identifying to described policy service functional entity;
Described policy service functional entity authenticates described terminal, and authentication is passed through then to continue, otherwise notifies described access AP authentification failure, refuses described terminal and inserts.
Wherein, described location service function entity obtains terminal to the RSSI that transmitting of a plurality of AP measures, and comprising:
Described location service function entity obtains the RSSI that transmitting of a plurality of AP measured that described terminal initiatively sends by the back in authentication; Or
Described location service function entity is after described terminal authentication passes through, send message to a plurality of AP, indicate described each AP to obtain the RSSI that described terminal measures transmitting of described AP, and the RSSI that gets access to is sent to described location service function entity.
Wherein, in described default authority and the positional information corresponding relation, also comprise corresponding relation with the terminal role;
Described policy service functional entity is according to the physical location of described terminal, from default authority and positional information corresponding relation, obtain the authority of described terminal after, also comprise:
Described policy service functional entity further obtains the authority corresponding with described terminal role according to the terminal role who described terminal is carried out obtain in the verification process.
The present invention also provides a kind of network access control system, is applied to comprise in the wlan network of terminal and a plurality of AP, and described terminal inserts AP by one among described a plurality of AP and inserts described WLAN; Described network access control system comprises location service function entity and policy service functional entity:
Described location service function entity is used to obtain the RSSI that terminal measures transmitting of a plurality of AP; Described a plurality of AP and corresponding RSSI are mated with the location information data of presetting, determine the physical location of described terminal and notify described policy service functional entity;
Described policy service functional entity is used for the physical location according to the terminal of described location service function entity notice, from default authority and positional information corresponding relation, obtains the authority of described terminal; Will the control strategy corresponding send to the access AP of described terminal, the authority of described terminal access network is controlled with the authority of described terminal.
Wherein, described location service function entity specifically is used for when location information data is set:
In the zone that WLAN covers, according to default sampling location, place terminal in each sampling location transmitting of a plurality of AP measured, obtain the RSSI of each AP correspondence;
According to described measurement result,, write down the RSSI that from each sampling location transmitting of described AP is measured in the described zone for each AP; To write down the result stores as location information data.
Wherein, described policy service functional entity also is used for:
Receive the message identifying of the access AP transmission of described terminal, described terminal is authenticated; Authentication is determined the physical location of described terminal by then notifying described location service function entity, otherwise notifies described access AP authentification failure, refuses described terminal and inserts.
Wherein, described location service function entity specifically is used for:
Obtain the RSSI that transmitting of a plurality of AP measured that described terminal initiatively sends by the back in authentication; Or
After described terminal authentication passes through, send message to a plurality of AP, indicate described each AP to obtain the RSSI that described terminal measures transmitting of described AP, and the RSSI that gets access to is sent to described location service function entity.
Wherein, in the described policy service functional entity in the default authority and positional information corresponding relation, when also comprising the corresponding relation with the terminal role, also be used in the described policy service functional entity:
According to the physical location of described terminal, from default authority and positional information corresponding relation, obtain the authority of described terminal after, the terminal role according to described terminal being carried out obtain in the verification process further obtains the authority corresponding with described terminal role.
Compared with prior art, the present invention has the following advantages:
Among the present invention, the terminal among the WLAN is mated transmitting of a plurality of AP RSSI that measures and the location information data of presetting, determine the physical location of terminal; And then obtain the authority corresponding with this physical location, generate corresponding strategy according to this authority the authority of terminal access network is controlled.Therefore, realized among the WLAN authority of terminal access network being controlled based on the residing physical location of terminal.
Description of drawings
Fig. 1 is the control method flow chart of accesses network authority among the WLAN that provides among the present invention;
Fig. 2 is the control method flow chart of accesses network authority in the application scenarios of the present invention;
Fig. 3 is the structural representation of the control system of accesses network authority among the WLAN that provides among the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described.
Core concept of the present invention is, terminal is mated transmitting of a plurality of AP (be generally and be no less than 3) wireless signal strength information RSSI that measures and the location information data of presetting, and determines the physical location of terminal; And then obtain the authority corresponding with this physical location, generate corresponding strategy according to this authority the authority of terminal access network is controlled.
Concrete, the invention provides the control method of accesses network authority among a kind of WLAN, be applied to comprise among the WLAN of terminal, location service function entity, policy service functional entity and a plurality of AP, terminal inserts AP by one among a plurality of AP and inserts WLAN, as shown in Figure 1, this method comprises:
Step s101, location service function entity obtain the wireless signal strength information RSSI that terminal measures transmitting of a plurality of AP; Wherein the quantity of AP is generally and is no less than 3;
Step s102, positioning function service entities mate a plurality of AP and corresponding RSSI with the location information data of presetting, determine the physical location and the notification strategy service function entity of terminal;
Step s103, policy service functional entity from default authority and positional information corresponding relation, obtain the authority of terminal according to the physical location of terminal;
Step s104, policy service functional entity will the control strategy corresponding with the authority of terminal send to the access AP of terminal, and the authority of terminal access network is controlled.
Below in conjunction with a concrete application scenarios, the specific embodiment of the present invention is described.In this application scenarios, be deployed with a plurality of access device AP and be used for terminal is inserted WLAN, the quantity of AP is generally and is no less than 3; And be deployed with location-server that the terminal positioning function is provided and the strategic server that terminal is authenticated and controls the access network authority.Wherein, location-server and strategic server also can be deployed on the same server in the network except can distributed deployment.
When implementing method provided by the invention, treating on each physical location in the management area of need store on location-server at first that WLAN covers is used for afterwards the terminal that is positioned at this zone being positioned about the location information data of AP signal strength signal intensity.Concrete location information data acquisition methods may further comprise the steps:
(1) on the location-server interface, sets up regional topological diagram, engineer's scale and sampled point (distance between adjacent collection point can be provided with as required, as is set to 2-3m) are set;
(2) use terminal in the wlan network of having disposed, to carry out the sampling of wireless signal, concrete: at each sampled point, terminal is put by different directions, terminal is measured the signal strength signal intensity that receives signal from each AP, and measurement result sent to location-server, comprise sign and the corresponding RSSI value of the AP that all receive in the measurement result; Wherein, the sign of AP can be MAC Address or the IP address of AP.In order to improve certainty of measurement, can repeatedly sample at each sampled point, and repeatedly sampled result sends to location-server.
(3) location-server is analyzed the data of each sampled point of receiving, gets rid of noise data wherein.In addition,, be as the criterion, avoid deviation occurring at the place, zone boundary with measurement result in the inner boundary collection in zone for each edges of regions.At last, calculating obtains the mean value of RSSI data from each sampled point to transmitting of each AP from repeatedly sampling, obtain in the zone from each sampled point the RSSI that transmitting of each AP measures is finished the establishment of location information data in the zone.
In the application scenarios of the present invention, be example to comprise 4 AP among the WLAN, then the form of the location information data of Chuan Jianing can be as shown in table 1 below:
Table 1. location information data
In addition, set up the corresponding relation of user right and regional location in advance at strategic server, be provided with authority to different user in the zones of different.In the application scenarios of the present invention, the corresponding relation of setting up user right and regional location can be as shown in table 2 below:
The corresponding relation of table 2. user right and regional location
In the example shown in the table 2, for the dissimilar users in the zones of different have disposed different access network authorities.Wherein, each included scope in zone can be described by the coordinate of its fringe region.
When accessing terminal to network, network access authority control method provided by the invention may further comprise the steps as shown in Figure 2:
Step s201, terminal send authentication information to AP, as username and password by inserting the AP access network.
Step s202, access AP send authentication request to strategic server, can use forms such as 802.1x or portal; By strategic server the identity of terminal is judged;
Step s203, access AP receive the response of strategic server to authentication information.Below situation about only authentication being passed through describes.
Step s204, access AP send authentication response to terminal.
Step s205, terminal send message to location-server, will send to location-server to wireless signal strength information RSSI and the AP sign that each AP signal measures.
In this step, can be provided with, make terminal have the ability that sends above-mentioned message in authentication by the back to location-server terminal.Concrete method to set up can be for inserting in the process of AP in terminal, insert AP and send a background program by the back to terminal at terminal authentication, send message by this background program of operation in terminal from the trend location-server, this background program can be restarted back deletion automatically in terminal.Avoided specific (special) requirements by this mode, made that this method can all can be compatible to the terminal that different vendor produced terminal.
Step s206, location-server mate to the position information database, determine the concrete physical location of terminal.Concrete matching process is, according to the location information data shown in the above-mentioned table 1, each AP sign and the corresponding RSSI and the location information data of terminal to report mated, and determines the physical location of terminal.When each AP sign of terminal to report can be mated with the location information data in the table 1 fully with corresponding RSSI, can directly determine the position of terminal.In the time can't mating fully, each AP sign that computing terminal reports and corresponding RSSI and location information data, and table 1 in the variance of location information data of each sampled point, to have the position of the sampled point of minimum variance, thereby determine location information of terminals as this terminal.
Step s207, location-server send to strategic server with location information of terminals.
Step s208, strategic server obtain the authority of accessing terminal to network from the corresponding relation of user right and regional location.Wherein, the user type of terminal is strategic server the authentication information according to terminal obtains in the verification process in that terminal is carried out.
Step s209, strategic server are issued to control strategy such as ACL (Access Control List, access control lists) or VLAN (Virtual LAN, VLAN) information on the access AP of terminal, realize the right assignment of accessing terminal to network.
Afterwards, terminal can regularly send RSSI and AP information to the position server, location server judges further whether the zone at terminal place changes, when the zone of judging the terminal place changes, the notification strategy server, again send control strategy to inserting AP by strategic server, guarantee to carry out redistributing of authority after terminal access position changes.
In addition, except adopting above-mentioned terminal after authentication is passed through, initiatively to send to location-server sends the method for the AP and the RSSI of correspondence, can also be after strategic server passes through the authentication of terminal by location-server, send snmp message to a plurality of AP, indicate each AP to obtain terminal to the measurement result of the transmission signal RSSI of AP and send to location-server, also can realize obtaining AP and corresponding RSSI.
The present invention also provides a kind of network access control system, is applied to comprise that in the wlan network of terminal and a plurality of AP, wherein the quantity of AP is generally and is no less than 3; Terminal inserts AP by one among a plurality of AP and inserts WLAN.This network access control system comprises location service function entity 10 and policy service functional entity 20 as shown in Figure 3.
Location service function entity 10 is used to obtain the RSSI that terminal measures transmitting of a plurality of AP; A plurality of AP and corresponding RSSI are mated with the location information data of presetting, determine the physical location and the notification strategy service function entity 20 of terminal;
Policy service functional entity 20 is used for the physical location according to the terminal of location service function entity 10 notices, from default authority and positional information corresponding relation, obtains the authority of terminal; Will the control strategy corresponding send to the access AP of terminal, the authority of terminal access network is controlled with the authority of terminal.
Wherein, location service function entity 10 specifically is used for when location information data is set:
In the zone that WLAN covers, according to default sampling location, place terminal in each sampling location transmitting of a plurality of AP measured, obtain the RSSI of each AP correspondence;
According to measurement result, for each AP, the RSSI that from each sampling location transmitting of AP is measured in the posting field; To write down the result stores as location information data.
In addition, location service function entity 10 can also specifically be used for:
Obtain the RSSI that transmitting of a plurality of AP measured that terminal initiatively sends by the back in authentication; Or after terminal authentication passes through, send message to a plurality of AP, indicate each AP to obtain the RSSI that terminal measures transmitting of AP, and the RSSI that gets access to is sent to location service function entity 10.
Wherein, policy service functional entity 20 also is used for:
The message identifying that the access AP of receiving terminal sends authenticates terminal; The physical location of authentication by then notifying location service function entity 10 to determine terminal, otherwise notice inserts the AP authentification failure, and the refusal terminal inserts.
In addition, in authority and positional information corresponding relation default in the policy service functional entity 20, when also comprising the corresponding relation with the terminal role, also be used in the policy service functional entity 20:
According to the physical location of terminal, from default authority and positional information corresponding relation, obtain the authority of terminal after, the terminal role according to terminal being carried out obtain in the verification process further obtains the authority corresponding with the terminal role.
Wherein, location service function entity 10 is positioned at consolidated network equipment or is positioned at the different network equipments with policy service functional entity 20.
The method and apparatus that the application of the invention provides mates terminal to transmitting of a plurality of AP wireless signal strength information RSSI that measures and the location information data of presetting, determine the physical location of terminal; And then obtain the authority corresponding with this physical location, generate corresponding strategy according to this authority the authority to terminal access network is controlled.Realized among the WLAN authority of terminal access network being controlled based on the residing physical location of terminal.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, unit in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the unit in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.A unit can be merged in the unit of the foregoing description, also can further split into a plurality of subelements.
Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
Claims (10)
1, the control method of accesses network authority among a kind of WLAN (wireless local area network) WLAN, it is characterized in that, be applied to comprise among the WLAN of terminal, location service function entity, policy service functional entity and a plurality of AP, described terminal inserts AP by one among described a plurality of AP and inserts described WLAN, and described method comprises:
Described location service function entity obtains the wireless signal strength information RSSI that terminal measures transmitting of a plurality of AP;
Described positioning function service entities mates described a plurality of AP and corresponding RSSI with the location information data of presetting, determine the physical location of described terminal and notify described policy service functional entity;
Described policy service functional entity from default authority and positional information corresponding relation, obtains the authority of described terminal according to the physical location of described terminal;
The access AP that described policy service functional entity will the control strategy corresponding with the authority of described terminal sends to described terminal controls the authority of described terminal access network.
2, the method for claim 1 is characterized in that, location information data default in the described positioning function service entities is specially:
In the zone that WLAN covers, according to default sampling location, place terminal in each sampling location transmitting of a plurality of AP measured, obtain the RSSI of each AP correspondence;
According to described measurement result,, write down the RSSI that from each sampling location transmitting of described AP is measured in the described zone for each AP; To write down the result is stored in the described positioning function service entities as location information data.
3, the method for claim 1 is characterized in that, described location service function entity also comprises before obtaining the wireless signal strength information RSSI that terminal measures transmitting of a plurality of AP:
The access AP of described terminal sends message identifying to described policy service functional entity;
Described policy service functional entity authenticates described terminal, and authentication is passed through then to continue, otherwise notifies described access AP authentification failure, refuses described terminal and inserts.
4, method as claimed in claim 3 is characterized in that, described location service function entity obtains terminal to the RSSI that transmitting of a plurality of AP measures, and comprising:
Described location service function entity obtains the RSSI that transmitting of a plurality of AP measured that described terminal initiatively sends by the back in authentication; Or
Described location service function entity is after described terminal authentication passes through, send message to a plurality of AP, indicate described each AP to obtain the RSSI that described terminal measures transmitting of described AP, and the RSSI that gets access to is sent to described location service function entity.
5, method as claimed in claim 3 is characterized in that, in described default authority and the positional information corresponding relation, also comprises the corresponding relation with the terminal role;
Described policy service functional entity is according to the physical location of described terminal, from default authority and positional information corresponding relation, obtain the authority of described terminal after, also comprise:
Described policy service functional entity further obtains the authority corresponding with described terminal role according to the terminal role who described terminal is carried out obtain in the verification process.
6, a kind of network access control system is characterized in that, is applied to comprise in the wlan network of terminal and a plurality of AP, and described terminal inserts AP by one among described a plurality of AP and inserts described WLAN; Described network access control system comprises location service function entity and policy service functional entity:
Described location service function entity is used to obtain the RSSI that terminal measures transmitting of a plurality of AP; Described a plurality of AP and corresponding RSSI are mated with the location information data of presetting, determine the physical location of described terminal and notify described policy service functional entity;
Described policy service functional entity is used for the physical location according to the terminal of described location service function entity notice, from default authority and positional information corresponding relation, obtains the authority of described terminal; Will the control strategy corresponding send to the access AP of described terminal, the authority of described terminal access network is controlled with the authority of described terminal.
7, system as claimed in claim 6 is characterized in that, described location service function entity specifically is used for when location information data is set:
In the zone that WLAN covers, according to default sampling location, place terminal in each sampling location transmitting of a plurality of AP measured, obtain the RSSI of each AP correspondence;
According to described measurement result,, write down the RSSI that from each sampling location transmitting of described AP is measured in the described zone for each AP; To write down the result stores as location information data.
8, system as claimed in claim 6 is characterized in that, described policy service functional entity also is used for:
Receive the message identifying of the access AP transmission of described terminal, described terminal is authenticated; Authentication is determined the physical location of described terminal by then notifying described location service function entity, otherwise notifies described access AP authentification failure, refuses described terminal and inserts.
9, system as claimed in claim 8 is characterized in that, described location service function entity specifically is used for:
Obtain the RSSI that transmitting of a plurality of AP measured that described terminal initiatively sends by the back in authentication; Or
After described terminal authentication passes through, send message to a plurality of AP, indicate described each AP to obtain the RSSI that described terminal measures transmitting of described AP, and the RSSI that gets access to is sent to described location service function entity.
10, system as claimed in claim 8 is characterized in that, in the described policy service functional entity in the default authority and positional information corresponding relation, when also comprising the corresponding relation with the terminal role, also is used in the described policy service functional entity:
According to the physical location of described terminal, from default authority and positional information corresponding relation, obtain the authority of described terminal after, the terminal role according to described terminal being carried out obtain in the verification process further obtains the authority corresponding with described terminal role.
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