CN1426201A - Method for realizing access controller function on radio access point - Google Patents
Method for realizing access controller function on radio access point Download PDFInfo
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- CN1426201A CN1426201A CN 02155498 CN02155498A CN1426201A CN 1426201 A CN1426201 A CN 1426201A CN 02155498 CN02155498 CN 02155498 CN 02155498 A CN02155498 A CN 02155498A CN 1426201 A CN1426201 A CN 1426201A
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Abstract
This invention provides a method for realizing access controller function on wireless access spot, by increasing related customer authentication, route transfer, NAT and flow control module, network data packet second and third layer transfer can be realized on wireless access spot, at the same time, customer authentication process and data flow control process can be realized on the said wireless access spot. After this invention is used, wireless LAN is arranged in small, middle small enterprises, hot areas and certain services needing wireless cover and broadband access, only wireless access spot equipment of conroller function is arranged to add to save cost.
Description
Technical field
The present invention relates to a kind of method that in WLAN (wireless local area network), the function of access controller is attached on the radio access point.
Background technology
At present, adopt the WLAN (wireless local area network) soverlay technique of IEEE 802.11 agreements to rise, but it is still taking traditional wired access controller AC (Access Controller) mode aspect access control and the operation charging.As Fig. 1, usually, the terminal wireless client is linked in the local area network (LAN) by radio access point AP (Access Point) 20, uses the access rights of access controller 3 control terminal wireless clients 10, available upstream and downstream bandwidth, customer charging information and other application then between local area network (LAN) and wide area network.Adopt this access control mode, must dispose an access controller 30 in addition to the outlet of wide area network at local area network (LAN), configuration router 40 or switch again in access controller 30 back then, wherein the function that realizes of radio access point 20 comprises wireless bridge, Packet Filtering, Simple Network Management Protocol, ICP/IP protocol stack or the like; The function of the realization of access controller 30 comprises access control, Bandwidth Management, authentification of user, mandate and charging etc.
Above-mentioned existing local area network building mode is very inconvenient for medium-sized and small enterprises, hot zones (hotspot) or some sector application, simultaneously since the price of access controller all than higher, so also can bring some burdens economically economically to the network operator.
Summary of the invention
The present invention is primarily aimed at the many drawbacks that exist in the prior art, and a kind of method that just can realize the access controller function on radio access point has been proposed, thereby realized the combination of WLAN (wireless local area network) soverlay technique and traditional cable broadband access control technology, and can utilize wireless distribution system WDS (Wireless Distribution System) to realize the network insertion covering system of full Wireless form.
Implementation method step of the present invention is as follows:
(1) on radio access point, should realize the packet in the same local area network (LAN) being transmitted, realize again the packet between local area network (LAN) and the wide area network being transmitted simultaneously by network address translation router NAT Router by spanning-tree bridge module STP Bridge;
(2) module that can carry out authentication and authentication to the user is installed on radio access point;
(3) on the basis of the network address translation router NAT Router module in radio access point user data traffic is controlled.
Wherein the hardware of radio access point will adopt the powerful microprocessor of performance, further extension facility memory and peripheral interface equipment.
Its packet of transmitting in same local area network (LAN) is to transmit according to the rule of the bridge learning table among the spanning-tree bridge module STP Bridge when transmitting by spanning-tree bridge module STP Bridge.
Wherein the packet between WLAN (wireless local area network) and the wide area network is transmitted and will be carried out the conversion of IP address by network address translation NAT agreement.
The module that the user is carried out authentication and authentication is installed on radio access point user identity is authenticated the mode that adopts dynamic host configuration protocol DHCP and WEB Portal to combine.
The module that the user is carried out authentication and authentication is installed on radio access point user identity is authenticated also can adopts IEEE 802.1x authentication mode, the dynamic key exchanging mechanism that it can provide strengthens safety of data transmission.
The mechanism of controlling before user data traffic control employing on the basis of network address translation router NAT Router module wraps in queuing to data.
Wherein the method step that the user's data flow is controlled is as follows:
(1) seven relevant parameters of each client definition;
(2) packet before queuing, need to check the data volume that sent in the current period whether greater than on the user/data volume of downstream rate defined;
(3) if the data volume that has sent in the current period is not more than on the user/data volume of downstream rate defined, this packet is joined wait that the data packet queue of sending out is medium to be sent;
(4) if the data volume that has sent in the current period greater than on the user/data volume of downstream rate defined, this packet is done discard processing.
Above-mentioned seven relevant parameters for each client definition are:
The MAC Address macAddr of client;
The upstream rate upRate of client;
The downstream rate downRate of client;
The current period (1 second), interior user uplink sent data counts upCount;
The descending transmission data counts of (1 second) interior user of current period downCount;
User uplink sends data amount and counts upTotal;
The descending transmission data amount of user is counted downTotal.
Interior user uplink of wherein current period (1 second) sends the numerical value of the descending transmission data counts of user downCount in data counts upCount and current period and brings in constant renewal in along with the transmission of data, carries out a zero clearing when the cycle of each period begins.
Realized utilizing the WDS technology in the radio access point of access controller function at this, can between the radio access point of having realized the access controller function and common radio access point, adopt complete wireless mode to carry out system interconnection.Can certainly adopt traditional wired mode to connect intercommunication.
Adopted after realizing the method for access controller function on the radio access point, all medium-sized and small enterprises, hot zones and the industry that some need use WLAN (wireless local area network) to use only need be disposed the accessing wirelessly point device, and need not to have invested on access controller in addition.If local area network (LAN) covers and has any problem for wiring, can also carry out the local area network (LAN) covering of complete wireless mode by the WDS system.In addition, on system management and safeguarding, also only need concentrate on this intelligentized accessing wirelessly point device and get final product, save the system maintenance expense, also be convenient to the network maintenance staff Network Management.
Description of drawings
Fig. 1 is based on the WLAN (wireless local area network) topological diagram of prior art;
Fig. 2 is that the present invention carries out bridge joint and transmits schematic diagram packet by spanning-tree bridge;
Fig. 3 is the present invention carries out route to the data that are sent to wide area network by the network address translation router a schematic diagram;
Fig. 4 is the present invention carries out route to the data that receive wide area network by the network address translation router a schematic diagram;
Fig. 5 adds the authenticating user identification module diagram in radio access point;
Fig. 6 is the system schematic that adds flow-control module in radio access point;
Fig. 7 is that the packet that adds flow control on the basis of network address translation router is transmitted schematic diagram;
Fig. 8 adopts wired mode to connect the topological diagram that radio access point is formed local area network (LAN) after adopting method of the present invention.
Fig. 9 adopts wireless distribution system to connect the topological diagram that radio access point is formed local area network (LAN) after adopting method of the present invention.
Embodiment
Below in conjunction with accompanying drawing specific embodiments of the present invention is done further and to be illustrated.
At first on the basis of realizing the radio access point function, adopt the more powerful microprocessor of performance, extension facility memory and peripheral interface equipment, for example general radio access point adopts 4M Flash flash memory and 8M synchronous DRAM SDRAM, and this invention extends to 8MFlash flash memory and 128M synchronous DRAM SDRAM; And general radio access point uses 1 802.11 wireless network card and an Ethernet card, and this invention can be used 2 802.11 wireless network cards and 4 Ethernet cards, to enlarge the wireless channel capacity and to support wired virtual LAN VLAN.Like this, adopt radio access point after this method not only to keep the function of existing radio access point, also possessed the hardware condition that access controller needs fully.
On the basis that has possessed hardware platform, the key that realizes this invention is the design of software function and integrated.The basic functions that radio access point has possessed comprises:
1. wireless access function is comprising the support to 40bit WEP encryption technology and 128bit RC4 encryption technology;
2. the bridge STP Bridge that has Spanning-Tree Protocol STP (Spanning Tree Protocol);
3. realize radio interconnected between the accessing points by wireless distribution system WDS, thereby realize wireless network system fully.
Utilize existing function of radio access point and more powerful processor and bigger memory space and peripheral interface, can come the function of extended wireless accessing points by increasing software module, and make it can on radio access point, realize the function of radio access point and access controller simultaneously by corresponding method.
The software module that needs to increase on radio access point has network address translation NAT (Network Address Translation) module and Port-Level NAT (Networks Address Port Translation) module, the dynamic host configuration protocol DHCP server module and WEB server or the IEEE 802.1x authentication module that are used for authentication, other module also has the user access control module based on RADIUS, Bandwidth Management module based on flow control, NTP (Network Time Protocol) NTP (Network Time Protocol) module is in order to the network enabled time synchronized.
Generally, radio access point is one two layers a bridging device, by spanning-tree bridge STP Bridge packet is carried out bridge joint and forwarding, and access controller can be understood as the equipment that plays route or gateway effect more than three layers or three layers, by network address translation router NAT Router the data between local area network (LAN) and the wide area network are carried out route and forwarding, both have adopted different bag forwarding mechanisms on the principle that packet is transmitted.Therefore, when realizing the function of access controller on radio access point, we need realize the bag forwarding of two layers and three layers simultaneously.Two layers of wireless bridge determine by inquiry bridge learning table two layers frame to which port is transmitted; And three-layer network closes by table of query and routing, determines how the 3rd layer IP datagram is transmitted.
As shown in Figure 2, it is two layers of forwarding mechanism carry out bridge joint and forwarding to packet by spanning-tree bridge STP Bridge schematic diagram, because remaining in local area network (LAN) inside, data flow bridge joint and forwarding carry out, therefore the packet that remains basically on two layers is transmitted, wherein the forwarding of data flow 1,2,3 to do not adopt the radio access point forwarding mechanism before the present invention similar, utilize spanning-tree bridge STP Bridge50 that the packet that belongs to the wireless user of this same radio access point under covering is carried out bridge joint and forwarding.If there is data flow 4 need send to wide area network WAN or other local area network (LAN)s, then will be by the route forwarding function on realizing three layers on the same radio access point.The realization of this function leans against the network address translation router NATRouter51 that increases in the radio access point and realizes, it has the effect of route and gateway to the data forwarding between local area network (LAN) and the wide area network,
As Fig. 3 is the schematic diagram that by network address translation router NATRouter51 the data that are sent to wide area network is carried out route in radio access point; Be all must carry out route and forwarding through network address translation router NAT Router51 from wired ethernet or from the packet that WLAN (wireless local area network) mails to wide area network; In like manner the packet that mails to local area network (LAN) or Ethernet by wide area network in Fig. 4 also must be by after the network address translation router NATRouter51 route, enter two layers spanning-tree bridge STP Bridge50 module then, by it packet of receiving is carried out bridge joint and forwarding, mail to corresponding wireless user or wire user terminal once more.
Realizing also will realize access control function once more, and two key issues of solution access control function being: user's authentication and user's flow control, i.e. broadband management on the double-deck principle of transmitting of packet.
Realize user's authentication management as in radio access point, having added dynamic host configuration protocol DHCP Server module 52 and WEB server 53 among Fig. 5, adopt the mode of DHCP+WebPortal, provide the user surf the Net account number and password, as user ID and authentication authority.This authentication mode only needs client that Web browser is arranged, do not need to install special software, use more convenient, simultaneously owing to there is network address translation protocol NAT to carry out network address translation and packet forwarding, therefore only dynamic host configuration protocol DHCP server and Web server need be in accessing points, realized, this kind authentication method can be realized easily.
Dynamic host configuration protocol DHCP and Web Portal authentication mode are fairly simple, but fail safe is not high; Can add IEEE802.1X authentication software module 54 and Radius client program 55 this moment in radio access point, realize the 802.1x authentication mode, the user offers user certificate or smart card (for example SIM card) by certain mode, whether the certificate or the decision of the information on the smart card that provide by the checking user provide this user desired service, and the dynamic key exchanging mechanism that 802.1x provides can make the transfer of data of wireless client safer.
Next need realize the user data traffic controlled function on radio access point, customer flow control promptly after the user is by authentication and authorization, will carry out that business is controlled and data traffic collection, restriction to the user as required, and charging information is provided simultaneously.Customer flow control both can realize on two layers of spanning-tree bridge forwarding mechanism of packet, also can realize in three layers of routing forwarding mechanism, and basic principle is exactly that the data of Control Network interface are sent out speed outward.Owing to realize that in radio access point the user data traffic that the access controller function need be controlled is to insert the data traffic of Internet, so we can control to user data traffic on the basis of three-layer network address transition NAT module.
User data traffic control realizes by queue mechanism.For the function that realizes access controller on radio access point, we can regard wireless lan interfaces and Ethernet interface as downlink port, and wide area network WAN Ethernet interface is regarded uplink port as.
User data traffic control will be controlled the user sends out data by equipment interface speed exactly, control user's upstream data rate if desired, just need the control user to send and by the data transmission rate of device forwards to uplink port, and control user's downstream rate if desired, then need control to mail to the user's data transmission rate to downlink port by device forwards.Since we can only the Control Network interface transmission rate, we can only be inserted into flow control function two stages in the flow process: promptly before the packet queuing or packet control after lining up.Consider if after the packet queuing, carry out flow control again, need formation to have enough big capacity just to be unlikely to cause overflowing of formation easily, and need the extra processing time, therefore adopt before the packet queuing and just carry out flow control.
No matter packet is to mail to downlink port or mail to uplink port from downlink port from uplink port, packet will carry out data traffic control through flow-control module 56 before entering network address translation router NAT Router51 and ranking, come the forwarding speed of control data, as shown in Figure 6.
As shown in Figure 7, network address translation router NAT Router at first receives packet from the upstream or downstream network interface in step 100, then in step 200, network address translation router NAT Router can carry out necessary filtration according to the packet that the packet header sign butt joint of packet is received, keep the packet that needs forwarding, abandon illegal packet; In step 300 packet being transmitted from up link or down link then, before joining the packet queuing of waiting to send out, at first is seven relevant parameters of each user definition in step 400, comprising:
The MAC Address macAddr of client;
The upstream rate upRate of client;
The downstream rate downRate of client;
The current period (1 second), interior user uplink sent data counts upCount;
The descending transmission data counts of (1 second) interior user of current period downCount;
User uplink sends data amount and counts upTotal;
The descending transmission data amount of user is counted downTotal;
The method that increases flow control is, packet needs to check before queuing on the user has sent in the current period (1 second)/the downlink data amount whether greater than on the user/data volume of downstream rate defined, if not, just forward in the step 600 this packet is joined in the outgoing queue, in step 700, packet is sent to uplink port or downlink port then; Otherwise forward step 800 to this packet is done discard processing.Wherein the numerical value of upCount/downCount constantly upgrades along with data transmission procedure, it is clearly once zero that the beginning of promptly 1 second each cycle period is set, can guarantee that like this data that at every turn are checked through are the data that refresh always, make user data traffic precisely controlled.
Be to adopt wired mode to connect the topological diagram that radio access point is formed local area network (LAN) after adopting method of the present invention as shown in Figure 8.The radio access point 60 that has increased the access controller function among the figure is connected with other radio access points 20 by wired mode, wire transmission is taked in information transmission between the wireless client 10 under the covering of different radio accessing points, thereby form a wireless access system, the local area network (LAN) at a plurality of wireless clients 10 places and the data communication between the outside wide area network only need WLAN (wireless local area network) exit wiring intelligent radio access point 60 get final product, need not to have connected up access controller in addition.Intelligent then radio access point 60 is linked among the wide area network Internet by router four 0, realizes the combination of local area network (LAN) and wide area network.
As Fig. 9 is that employing wireless distribution system WDS (wireless distribution system) technology connects different radio accessing points composition radio interconnected local area network (LAN) topological diagram fully after adopting method of the present invention, data communication between wireless client 10 and wide area network also only need the wiring of WLAN (wireless local area network) exit intelligent radio access point 60 get final product, this intellectuality radio access point 60 have following three effects:
(1) wireless client is carried out access control, authentication and accounting;
(2), wireless client is covered as radio access point;
(3) as a node of WLAN (wireless local area network), be connected with other radio access points by wireless distribution system WDS.
This local area network (LAN) by having realized the access controller function radio access point and common radio access point between utilize wireless distribution system WDS technology, can set up a wireless access system easily.In this system, the radio access point of having realized the access controller function need possess very powerful data-handling capacity, it is the control maincenter of whole WLAN (wireless local area network), and require network that the data transmission capabilities of 11M bandwidth will be arranged based on the WLAN (wireless local area network) that the WDS technology is formed, so in order to make the local area network (LAN) that utilizes wireless distribution system WDS technology to be formed between the radio access point of having realized the access controller function and the common radio access point that better network performance can be arranged, the high transmission speed 54Mbps of IEEE802.11 agreement is adopted in suggestion on data transmission bauds, thereby reaches better network performance.And whole network system does not need wired cable (can expand cable network, but optional), and is therefore all highly beneficial for the autgmentability of system group network, system maintenance and management, network.In addition should intellectuality radio access point couple in router 40 once more, insert the radio access point 60 that Internet only just can realize by intellectuality by it and just make WLAN (wireless local area network) and the organic combination of wide area network.
Claims (10)
1, a kind of method that on radio access point, realizes the access controller function, its specific implementation method is as follows:
(1) on radio access point, should realize the packet in the same local area network (LAN) being transmitted, realize again the packet between local area network (LAN) and the wide area network being transmitted simultaneously by network address translation router NAT Router by spanning-tree bridge module STP Bridge;
(2) module that can carry out authentication and authentication to the user is installed on radio access point;
(3) on the basis of the network address translation router NAT Router module in radio access point user data traffic is controlled.
2, the method that realizes the access controller function on radio access point according to claim 1 is characterized in that the hardware of radio access point will adopt the powerful microprocessor of performance, further extension facility memory and peripheral interface equipment.
3, the method that on radio access point, realizes the access controller function according to claim 1, it is characterized in that its packet of transmitting is to transmit according to the rule of the bridge learning table among the spanning-tree bridge module STPBridge when transmitting by spanning-tree bridge module STP Bridge in same local area network (LAN).
4, the method that realizes the access controller function on radio access point according to claim 1 is characterized in that, the packet between WLAN (wireless local area network) and the wide area network is transmitted will carry out the conversion of IP address by network address translation NAT agreement.
5, the method that on radio access point, realizes the access controller function according to claim 1, it is characterized in that, the module that the user is carried out authentication and authentication is installed on radio access point user identity is authenticated the mode that adopts dynamic host configuration protocol DHCP and WEBPortal to combine; The module that the user is carried out authentication and authentication is installed on radio access point user identity is authenticated the dynamic key exchanging mechanism that adopts IEEE 802.1x agreement to provide.
6, the method that on radio access point, realizes the access controller function according to claim 1, it is characterized in that the mechanism of controlling before the user data traffic control employing on the basis of network address translation router NAT Router module wraps in queuing to data.
7, the method that realizes the access controller function on radio access point according to claim 6 is characterized in that, the method step that the user's data flow is controlled is gone into down:
(1) is seven relevant parameters of each client definition;
(2) packet before queuing, need to check the data volume that sent in the current period whether greater than on the user/data volume of downstream rate defined;
(3) if the data volume that has sent in the current period is not more than on the user/data volume of downstream rate defined, this packet is joined wait that the data packet queue of sending out is medium to be sent;
(4) if the data volume that has sent in the current period greater than on the user/data volume of downstream rate defined, this packet is done discard processing.
8, the method that realizes the access controller function on radio access point according to claim 7 is characterized in that, seven relevant parameters that define for each client are:
(1) the MAC Address macAddr of client;
(2) the upstream rate upRate of client;
(3) the downstream rate downRate of client;
(4) user uplink sends data counts upCount in the current period;
(5) the descending transmission data counts of user downCount in the current period;
(6) user uplink sends data amount and counts upTotal;
(7) the descending transmission data amount of user is counted downTotal.
9, the method that on radio access point, realizes the access controller function according to claim 8, it is characterized in that, the numerical value of user uplink transmission data counts upCount and the interior descending transmission data counts of user downCount of current period is brought in constant renewal in along with the transmission of data in the wherein current period, carries out a zero clearing when the cycle of each period begins.
10, the method that on radio access point, realizes the access controller function according to claim 1, it is characterized in that, adopt wireless distribution system WDS technology to connect intercommunication between the radio access point of adding access controller function and the common radio access point, thereby realize from the complete wireless access system below the access control point.
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| WO2007054006A1 (en) * | 2005-11-14 | 2007-05-18 | Huawei Technologies Co., Ltd. | A base station of wideband wireless access system and a method for realizing group-broadcast service |
| CN1331328C (en) * | 2003-06-06 | 2007-08-08 | 华为技术有限公司 | Address converting method based on identity authentication |
| CN100362792C (en) * | 2005-08-16 | 2008-01-16 | 浙江中控技术有限公司 | Intelligent gate bridge and its method for realizing network isolation control ' |
| CN100426770C (en) * | 2005-05-08 | 2008-10-15 | 中兴通讯股份有限公司 | Radio local network net bridge, bridging system and its realizing method |
| CN100463462C (en) * | 2006-12-18 | 2009-02-18 | 西安西电捷通无线网络通信有限公司 | Coordinate access control system of ternary structure |
| CN101816201A (en) * | 2007-10-05 | 2010-08-25 | Iti苏格兰有限公司 | distributed protocol for authorisation |
| CN1848797B (en) * | 2005-04-15 | 2010-10-06 | 上海艾泰科技有限公司 | Method for searching multi-routing optimum path and load balancing on middle and lower end router |
| CN101179477B (en) * | 2006-11-10 | 2010-12-08 | 中国科学院声学研究所 | Method for implementing built-in router |
| CN102355660A (en) * | 2011-10-12 | 2012-02-15 | 杭州华三通信技术有限公司 | Uplink wireless access method and wireless access network bridge device |
| CN101044746B (en) * | 2004-10-06 | 2012-05-02 | 赛贝斯365有限公司 | System and method for message-based access |
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| CN1848797B (en) * | 2005-04-15 | 2010-10-06 | 上海艾泰科技有限公司 | Method for searching multi-routing optimum path and load balancing on middle and lower end router |
| CN100426770C (en) * | 2005-05-08 | 2008-10-15 | 中兴通讯股份有限公司 | Radio local network net bridge, bridging system and its realizing method |
| CN100362792C (en) * | 2005-08-16 | 2008-01-16 | 浙江中控技术有限公司 | Intelligent gate bridge and its method for realizing network isolation control ' |
| WO2007054006A1 (en) * | 2005-11-14 | 2007-05-18 | Huawei Technologies Co., Ltd. | A base station of wideband wireless access system and a method for realizing group-broadcast service |
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| CN103986692A (en) * | 2014-04-17 | 2014-08-13 | 深圳市信锐网科技术有限公司 | Data forwarding method and system based on wireless access point |
| CN103986692B (en) * | 2014-04-17 | 2017-04-19 | 深圳市信锐网科技术有限公司 | Data forwarding method and system based on wireless access point |
| CN105743867A (en) * | 2014-12-12 | 2016-07-06 | 华为技术有限公司 | Method and equipment for network authority linkage control |
| CN105743867B (en) * | 2014-12-12 | 2019-03-19 | 华为技术有限公司 | A kind of network legal power inter-linked controlling method and equipment |
| CN107493581A (en) * | 2016-06-13 | 2017-12-19 | 上海技腾通讯设备有限公司 | Wireless access point device access system and cut-in method |
| CN114567600A (en) * | 2022-01-27 | 2022-05-31 | 深圳市潮流网络技术有限公司 | Traffic management method and related equipment |
| CN114567600B (en) * | 2022-01-27 | 2024-04-16 | 深圳市潮流网络技术有限公司 | Traffic management method and related equipment |
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| CN1175626C (en) | 2004-11-10 |
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