CN104113879A - WiFi communication system deployed with cloud ACs (access controllers) and communication method adopting WiFi communication system deployed with cloud ACs - Google Patents
WiFi communication system deployed with cloud ACs (access controllers) and communication method adopting WiFi communication system deployed with cloud ACs Download PDFInfo
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- CN104113879A CN104113879A CN201410397174.6A CN201410397174A CN104113879A CN 104113879 A CN104113879 A CN 104113879A CN 201410397174 A CN201410397174 A CN 201410397174A CN 104113879 A CN104113879 A CN 104113879A
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Abstract
The invention provides a WiFi communication system deployed with cloud ACs (access controllers) and a communication method adopting the WiFi communication system deployed with the cloud ACs (access controllers). The WiFi communication system comprises a plurality of cloud ACs, an AC proxy server used for performing load balancing treatment on data streams, and an AP (access point) communicated with the cloud ACs by the AC proxy server, wherein the CAPWAP (Control And Provisioning Of Wireless Access Points) follows between the AP and each AC proxy server, and the IP (internet protocol) address of the AC proxy server is opened to the AP, so that the AP can find the AC proxy server after being electrified. According to the system, other private protocols are not required to be expanded to the AP, so that the development cost is reduced on the basis of the cloud ACs, besides, the cloud ACs are not exposed to a client side, the ACs can be well hidden and the security of the ACs is improved.
Description
Technical field
The present invention relates to the communications field, in particular to the WiFi communication system and the communication means that are deployed with cloud AC.
Background technology
At present, software defined network (Software Defined Network based on Intel Virtualization Technology, and virtual (the Network Function Virtualization of network function SDN), NFV) trend is more and more clear, numerous research institutions, communication equipment business, communications service provider begins one's study the Network function remodeling under traditional mode is deployed in to high in the clouds.For example: dispose beyond the clouds AC (Access Controller, access controller), referred to as cloud AC, the difference of AC and traditional mode deployment is disposed in high in the clouds, mainly AP (Access Pointer, access node) need to cross over Internet and be connected with AC, need the subject matter solving is exactly how AP finds AC, and connect with AC.
Tradition Wi-Fi network, AC is conventionally by CAPWAP (Control And Provisioning of Wireless Access Points Protocol Specification, wireless access point control and configuration protocol) in tunnel protocol management AP, before setting up CAPWAP tunnel, AP need to solve and how find AC and set up with it CAPWAP tunnel, and correlation technique has provided the method for finding AC.But while disposing AC beyond the clouds, the method of this discovery AC can not be suitable for, so AC producer has developed proprietary protocol separately, for example tunnel (tunnel) pattern, this pattern mainly contains ipsec tunnel pattern, http tunnel pattern, https tunnel pattern.The general thought of these patterns is all that the interface channel between AP and AC is encapsulated by tunnel, makes interconnecting of AP and AC cross over Internet, is connected to the AC in high in the clouds.This mode is deposited and need to be expanded AP and could allow AP support corresponding proprietary protocol, and high in the clouds AC cannot manage the AP that does not support proprietary protocol; Simultaneously, the flow process more complicated of this tunnel pattern, need facility or the similar facilities of public deployment http proxy (hypertext connection protocol proxy server) and tunnel termination, these problems cause high in the clouds AC to adopt the mode of proprietary protocol to dispose with operating cost all higher.
For disposing in the environment of high in the clouds AC in private network IP in correlation technique and all higher problems of operating cost, effective solution is not yet proposed at present.
Summary of the invention
The object of the present invention is to provide a kind of WiFi communication system and communication means that is deployed with cloud AC, to solve the above problems.
A kind of WiFi communication system that is deployed with cloud AC is provided in an embodiment of the present invention, has comprised: multiple cloud AC, execution have been carried out the AC proxy server of load balance process and the AP communicating by letter with multiple cloud AC by AC proxy server to the data flow of multiple cloud AC; Wherein, between AP and AC proxy server, follow CAPWAP, the IP address of AC proxy server is open to AP, so that AP finds AC proxy server after powering on.
Above-mentioned AC proxy server comprises: AP identification record module, in the time receiving AP and set up the connection request of CAPWAP, records AP session label information and AP equipment identification information; Connection request distribution module, for based on load-balancing mechanism, the connection request of AP being transmitted to corresponding cloud AC, when again receive from AP message time, the information based on load-balancing mechanism and AP identification record module records E-Packets.
The source IP address that above-mentioned AP session label information is AP and the combination of source port number, or be the combination of source IP address, source port number and the CAPWAP session identification number of AP; AP equipment identification information is the media interviews control MAC Address of product ID or the AP of AP.
The data flow of transmitting between above-mentioned AP and AC proxy server is the data flow of expressly form or the data flow for ciphertext form.
A kind of communication means of applying said system is also provided in an embodiment of the present invention, has comprised: AC proxy server has been followed CAPWAP and set up the communication connection between cloud AC and AP; AC proxy server forwards the data flow from AP based on load-balancing mechanism.
Above-mentioned AC proxy server is followed the communication connection that CAPWAP sets up between cloud AC and AP and is comprised: in the time receiving AP and set up the connection request of CAPWAP, this AC proxy server records AP session label information and AP equipment identification information; AC proxy server is transmitted to corresponding cloud AC based on load-balancing mechanism by the connection request of AP; When again receive from above-mentioned AP message time, this AC proxy server, according to the AP session label information of load-balancing mechanism and record and AP equipment identification information, forwards this message.
The source IP address that above-mentioned AP session label information is AP and the combination of source port number, or be the combination of source IP address, source port number and the CAPWAP session identification number of AP; AP equipment identification information is the media interviews control MAC Address of product ID or the AP of AP.
The method and system that the embodiment of the present invention provides by arranging AC proxy server between cloud AC and AP, between this AC proxy server and AP, follow CAPWAP, and this AC proxy server can be carried out load-balancing mechanism to the data flow of AP, complete its with cloud AC between communicate by letter, the AP of this system does not need to expand other proprietary protocol, on the basis of realizing cloud AC, has reduced development cost; Meanwhile, cloud AC leaks no longer cruelly to client, has realized preferably hiding of AC, has promoted the fail safe of AC.
Brief description of the drawings
Fig. 1 shows the structural representation of the WiFi communication system that is deployed with cloud AC that the embodiment of the present invention provides;
Fig. 2 shows the communication means flow chart of the application system shown in Figure 1 that the embodiment of the present invention provides.
Embodiment
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
The embodiment of the present invention provides a kind of WiFi communication system and communication means that is deployed with cloud AC, this system and method can be very easy realize AC high in the clouds dispose, do not need traditional Wi-Fi AP transform and expand, under existing network specification, realizing the high in the clouds of AC completely disposes, and meet the extensibility requirement of capacity, what meet operation rank can operation management requirement, can reduce hardware cost and management maintenance cost that user disposes Wi-Fi network, along with the management of customer service or demand growth dynamic expansion Wi-Fi network, do not need user disposing the Wi-Fi network initial stage with regard to large scale investment, specific embodiment is as follows.
The structural representation of the shown in Figure 1 WiFi communication system that is deployed with cloud AC, this system comprises:
Multiple cloud AC, only taking three cloud AC as example describes, are specially cloud AC12, cloud AC14, cloud AC16 in figure;
Carry out the AC proxy server 20 that the data flow of multiple cloud AC is carried out to load balance process;
The AP communicating by letter with multiple cloud AC by AC proxy server 20, as the AP32 in figure, AP34;
Wherein, between AP and AC proxy server 20, follow CAPWAP, the IP address of AC proxy server 20 is open to AP, so that AP finds AC proxy server after powering on.
The system of the present embodiment by arranging AC proxy server between cloud AC and AP, between this AC proxy server and AP, follow CAPWAP, and this AC proxy server can be carried out load-balancing mechanism to the data flow of AP, complete its with cloud AC between communicate by letter, the AP of this system does not need to expand other proprietary protocol, on the basis of realizing cloud AC, has reduced development cost; Meanwhile, cloud AC leaks no longer cruelly to client, has realized preferably hiding of AC, has promoted the fail safe of AC.
AC proxy server in the embodiment of the present invention can arrange its position flexibly according to practical application, for example, is arranged in IAD, or is arranged in the machine room of cloud AC place.
Correct in order to guarantee the forwarding of message, above-mentioned AC proxy server 20 comprises: AP identification record module, in the time receiving AP and set up the connection request of CAPWAP, records AP session label information and AP equipment identification information; Connection request distribution module, for being transmitted to corresponding cloud AC based on load-balancing mechanism by the connection request of AP; And when again receive from described AP message time, forward this message according to the information of above-mentioned AP identification record module records and load-balancing mechanism.
The source IP address that above-mentioned AP session label information is AP and the combination of source port number, or be the combination of source IP address, source port number and the CAPWAP session identification number of AP; AP equipment identification information is the media interviews control MAC Address of product ID or the AP of AP.In the time that AP is in public network, AC proxy server 20 can only record source IP address, source port number and the AP equipment identification information of AP; In the time that AP is in the ad hoc networks such as private network, AC proxy server 20, in recording the source IP address of AP, source port number and AP equipment identification information, can record CAPWAP session identification number, in order to bind control channel and data channel.
Said system can not done any expansion requirement to AP end, brings in and sees that still using CAPWAP standard method to complete AP finds AC, and connect with AC from AP.
Said system cloud AC is convenient to expansion, meet the dynamic growth demand of customer network scale, by introducing load-balancing technique, load-balancing function is deployed in to an AC proxy server (also can be called cloud AC example or cloud AC proxy example), this AC proxy server is externally announced IP address for receiving AP to connect, and flow is balanced to according to packet classification management expectancy on the cloud AC of other expansions, expansion cloud AC out does not externally announce IP address, completes the function identical with traditional AC.
Said system is followed CAPWAP standard, the AP that powers on uses static configuration mode to configure the IP address of AC proxy server, or, use DNS mode by the URL of AC proxy server or the IP address that obtains AC proxy server by public DNS, AP sets up CAPWAP with AC proxy server and is connected.
For AC proxy server, can, according to the residing environment of AP, record the relevant information of AP, be convenient to follow-up message repeating.For example: under normal circumstances, in the time receiving that AP sets up CAPWAP connection request, record the source IP address of AP, the product ID (or MAC Address) of source port number and AP.In particular cases (for example AP is in private network environment, be that AP is after NAT device), AC proxy server can record CAPWAP session ID (session identification number), except recording the source IP address of AP, source port number and and the product ID (or MAC Address) of AP outside, also can record CAPWAP session ID (session identification number) wherein, recording CAPWAP session ID can control channel and the binding of data channel.
The data flow of transmitting between AP in the embodiment of the present invention and AC proxy server can or be the data flow of ciphertext form for the data flow of plaintext form.For example, the data flow of transmitting between AP and AC proxy server adopts DTLS (Datagram Transport Layer Security) agreement.
The embodiment of the present invention also provides a kind of communication means of applying said system, and referring to Fig. 2, the method comprises the following steps:
Step S202, AC proxy server is followed CAPWAP and is set up the communication connection between cloud AC and AP;
Step S204, AC proxy server forwards the data flow from AP based on load-balancing mechanism.
The method of the present embodiment by arranging AC proxy server between cloud AC and AP, between this AC proxy server and AP, follow CAPWAP, and this AC proxy server can be carried out load-balancing mechanism to the data flow of AP, complete its with cloud AC between communicate by letter, the AP of this system does not need to expand other proprietary protocol, on the basis of realizing cloud AC, has reduced development cost; Meanwhile, cloud AC leaks no longer cruelly to client, has realized preferably hiding of AC, has promoted the fail safe of AC.
AC proxy server is followed the communication connection that CAPWAP sets up between cloud AC and AP and is comprised: in the time receiving AP and set up the connection request of CAPWAP, AC proxy server records AP session label information and AP equipment identification information; AC proxy server is transmitted to corresponding cloud AC based on load-balancing mechanism by the connection request of AP, when again receive from this AP message time, AC proxy server, according to above-mentioned AP session label information and the AP equipment identification information of load-balancing mechanism and record, forwards this message.
The source IP address that above-mentioned AP session label information is AP and the combination of source port number, or be the combination of source IP address, source port and the CAPWAP session identification number of AP; AP equipment identification information is the media interviews control MAC Address of product ID or the AP of AP.
In above-described embodiment, return to the message of AP from cloud AC, there are two kinds of situations, one is to return to AP (IAD mode) through AC proxy server, now on AC proxy server, send to AP according to strategy modification message, one is without AC proxy server (other extension mode), need to the source IP address of message be modified as to the VSIP (Virtual Server IP Address, virtual server IP address) of AC proxy server on cloud AC.
The technology that above embodiment provides is not expanded proprietary protocol requirement to AP, simplifying AP realizes, cloud AC can manage any AP that meets specification, does not need public deployment AC proxy server and tunnel (tunnel) termination facility, has simplified the deployment of cloud AC; Meanwhile, cloud AC leaks no longer cruelly to client, has realized preferably hiding of AC, has promoted the fail safe of AC.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. one kind is deployed with the WiFi communication system of cloud access controller AC, it is characterized in that, comprising: multiple cloud AC, execution are carried out the AC proxy server of load balance process and the access node AP communicating by letter with described multiple cloud AC by described AC proxy server to the data flow of described multiple cloud AC;
Wherein, between described AP and described AC proxy server, follow wireless access point control and configuration protocol CAPWAP, the IP address of described AC proxy server is open to described AP, so that described AP finds described AC proxy server after powering on.
2. WiFi communication system according to claim 1, is characterized in that, described AC proxy server comprises:
AP identification record module, in the time receiving AP and set up the connection request of CAPWAP, records described AP session label information and described AP equipment identification information;
Connection request distribution module, for the connection request of described AP being transmitted to corresponding cloud AC based on load-balancing mechanism, when again receive from described AP message time, the information based on described load-balancing mechanism and described AP identification record module records forwards described message.
3. WiFi communication system according to claim 2, is characterized in that, the source IP address that described AP session label information is described AP and the combination of source port number, or be the combination of source IP address, source port number and the CAPWAP session identification number of described AP; The media interviews control MAC Address of the product ID that described AP equipment identification information is described AP or described AP.
4. WiFi communication system according to claim 1, is characterized in that, the data flow of transmitting between described AP and described AC proxy server is the data flow of expressly form or the data flow for ciphertext form.
5. application rights requires in 1 to 4 a communication means for system described in any one, it is characterized in that, comprising:
Described AC proxy server is followed CAPWAP and is set up the communication connection between cloud AC and AP;
Described AC proxy server forwards the data flow from described AP based on load-balancing mechanism.
6. method according to claim 5, is characterized in that, described AC proxy server is followed the communication connection that CAPWAP sets up between cloud AC and AP and comprised:
In the time receiving AP and set up the connection request of CAPWAP, described AC proxy server records described AP session label information and described AP equipment identification information;
Described AC proxy server is transmitted to corresponding cloud AC based on load-balancing mechanism by the connection request of described AP;
When again receive from described AP message time, described AC proxy server, according to the described AP session label information of described load-balancing mechanism and record and described AP equipment identification information, forwards described message.
7. method according to claim 6, is characterized in that, the source IP address that described AP session label information is described AP and the combination of source port number, or be the combination of source IP address, source port number and the CAPWAP session identification number of described AP; The media interviews control MAC Address of the product ID that described AP equipment identification information is described AP or described AP.
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