CN103260150A - Wireless access control method, wireless access point and wireless access controller - Google Patents
Wireless access control method, wireless access point and wireless access controller Download PDFInfo
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Abstract
The invention provides a wireless access control method, a wireless access point and a wireless access controller. The wireless access control method comprises the steps that the wireless access point (AP) broadcasts discovering request messages to wireless access controllers (ACs) of an AC pool set; the AP receives a discovering response message sent by a first AC in the AC pool set, wherein the discovering response message contains a virtual Internet protocol (IP) address of the first AC; The AP sends a first address resolution protocol (ARP) message to the first AC according to the virtual IP address of the first AC; the AP receives an ARP response message sent by the first AC, wherein the ARP response message contains a media access control (MAC) address of the first AC; the AP uses the MAC address of the first AC as a second-layer destination address, and uses the virtual IP address of the first AC as a third-layer destination address to send out wireless access to the first AC. The wireless access control method, the wireless access point and the wireless access controller effectively solve the technical problems of being high in requirement for managing the AC, and high in risk of single points of failure in the prior art.
Description
Technical field
The present invention relates to the communication technology, relate in particular to a kind of wireless access control method, WAP (wireless access point) and Radio Access Controller.
Background technology
In operation level WLAN, usually adopt centralized architecture, be Radio Access Controller (Access Controller, AC)-WAP (wireless access point) (Access Point, AP) structure, wherein, AP is a wireless transmitting-receiving equipments, is responsible for becoming from the data transaction that cable network receives wireless signal to send, and the wireless signal that receives is converted to data and is forwarded to cable network, AP needs and AC connects, and provides the wireless access service behind the adding WLAN.AC provides the centralized management of WLAN, finishes the authentication/configuration/functions such as data forwarding to the wireless user, plays central controlled effect.
In the prior art, propose a kind of management AC that serves as management AC that from all AC, selectes, selected to be used for serving as the professional AC of professional AC again by this management AC, inserted satisfactory AP by professional AC.Yet this method is to management the having relatively high expectations of AC, in case management AC fault causes the AP can't access service AC.
Summary of the invention
The invention provides a kind of wireless access control method, WAP (wireless access point) and Radio Access Controller, in order to solve in the prior art management AC had relatively high expectations the problem that the risk of Single Point of Faliure is bigger.
On the one hand, the embodiment of the invention provides a kind of wireless access control method, comprising:
Wireless access point AP is found request message to each the AC broadcasting in the group of Radio Access Controller AC pond;
Described AP receives the discovery response message that the AC in the group of described AC pond sends, carry the virtual Internet protocol IP address of a described AC in the described discovery response message, what a described AC did not receive in the setting-up time of determining according to local loading condition that other AC send in the group of described AC pond first has sent to described AP behind the response message and has found that response message and other AC in the group of described AC pond send second response message;
Described AP sends first ARP message according to the virtual ip address of a described AC to a described AC;
Described AP receives the arp response message that a described AC sends, the media access control MAC address of carrying a described AC in the described arp response message;
Described AP is two layers of destination address with the MAC Address of a described AC, is that three layers of destination address are initiated wireless access to a described AC with the virtual ip address of a described AC.
On the other hand, the embodiment of the invention provides another kind of wireless access control method, comprising:
AC in the group of Radio Access Controller AC pond receives the discovery request message of wireless access point AP broadcasting;
If first response message that a described AC does not receive in the setting-up time of determining according to local loading condition that other AC send in the group of described AC pond, then a described AC sends to described AP and finds that response message and other AC in the group of described AC pond send second response message, the virtual Internet protocol IP address of carrying a described AC in the described discovery response message;
A described AC receives first ARP message that described AP sends;
A described AC sends arp response message to described AP, carry the media access control MAC address of a described AC in the described arp response message, so that described AP is two layers of destination address with the MAC Address of a described AC, be that three layers of destination address are initiated wireless access to a described AC with the virtual ip address of a described AC.
On the other hand, the embodiment of the invention provides a kind of wireless access point AP, comprising: sending module, receiver module and radio access module;
Described sending module is used for finding request message to each AC broadcasting of Radio Access Controller AC pond group;
Described receiver module, the discovery response message that is used for the AC transmission of the described AC of reception pond group, carry the virtual Internet protocol IP address of a described AC in the described discovery response message, what a described AC did not receive in the setting-up time of determining according to local loading condition that other AC send in the group of described AC pond first has sent to described AP behind the response message and has found that response message and other AC in the group of described AC pond send second response message;
Described sending module also is used for sending first ARP message according to the virtual ip address of a described AC to a described AC;
Described receiver module also is used for receiving the arp response message that a described AC sends, the media access control MAC address of carrying a described AC in the described arp response message;
Described radio access module, the MAC Address that is used for a described AC is two layers of destination address, is that three layers of destination address are initiated wireless access to a described AC with the virtual ip address of a described AC.
On the other hand, the embodiment of the invention provides a kind of Radio Access Controller AC, comprising: receiver module, sending module and determination module;
Described receiver module is used for receiving the discovery request message that wireless access point AP is broadcasted;
Described sending module, be used for if first response message that described receiver module does not receive in the setting-up time that described determination module is determined according to local loading condition that other AC send in the group of described AC pond, then send to described AP and find that response message and other AC in the group of described AC pond send second response message, the virtual Internet protocol IP address of carrying an AC in the described discovery response message;
Described receiver module also is used for receiving first ARP message that described AP sends;
Described sending module, also be used for sending arp response message to described AP, the MAC Address of carrying a described AC in the described arp response message, so that described AP is two layers of destination address with the MAC Address of a described AC, be that three layers of destination address are initiated wireless access to a described AC with the virtual ip address of a described AC.
Wireless access control method provided by the invention, WAP (wireless access point) and Radio Access Controller, wireless access point AP is found request message to each the AC broadcasting in the group of Radio Access Controller AC pond; What the AC in the group of AC pond did not receive in the setting-up time of determining according to local loading condition that other AC send in the group of AC pond first has sent to this AP behind the response message and has found response message, and other AC in the group of AC pond send second response message; Carry the virtual Internet protocol IP address of an AC in this discovery response message, AP sends first ARP message according to the virtual ip address of finding in the response message to an AC; After the one AC receives an ARP message, send arp response message to AP, this arp response message is carried the media access control MAC address of an AC; AP is two layers of destination address with the MAC Address of an AC, be that three layers of destination address are initiated wireless access to an AC with the virtual ip address of an AC, has improved the success rate that AP inserts AC.
Description of drawings
Fig. 1 is the flow chart of an embodiment of wireless access control method provided by the invention;
Fig. 2 is the flow chart of another embodiment of wireless access control method provided by the invention;
Fig. 3 is the flow chart of another embodiment of wireless access control method provided by the invention;
Fig. 4 is the system architecture schematic diagram that is applicable to radio switch-in method shown in Figure 3 provided by the invention;
Fig. 5 is the structural representation of an embodiment of WAP (wireless access point) provided by the invention;
Fig. 6 is the structural representation of an embodiment of Radio Access Controller provided by the invention.
Embodiment
Fig. 1 is the flow chart of an embodiment of wireless access control method provided by the invention.As shown in Figure 1, the executive agent of following steps can be wireless access point AP.This wireless access control method specifically comprises:
S101, wireless access point AP is found request message to each the AC broadcasting in the group of Radio Access Controller AC pond;
Wherein, one group of AC that Radio Access Controller AC pond group can be made up of several AC, grouping can wait to divide according to the geographical position usually.When wireless access point AP needs and AC when connecting, at first each AC in this AC pond group sends with the forms of broadcasting and finds request message, so that the AC for oneself providing wireless access to serve to be provided.
S102:AP receives the discovery response message that the AC in the group of AC pond sends, carry the virtual Internet protocol IP address of an AC in this discovery response message, what an AC did not receive in the setting-up time of determining according to local loading condition that other AC send in the group of AC pond first has sent to AP behind the response message and has found that response message and other AC in the group of AC pond send second response message;
Each AC in the group of AC pond determines a setting-up time according to local loading condition after receiving the discovery request message of AP broadcasting.If current AC does not receive in the group of AC pond that other AC send in this setting-up time first response message, this current AC just sends to AP as an AC and finds response message, the virtual Internet protocol IP address of carrying an AC in this discovery response message so.An AC other AC in the group of AC pond send second response message simultaneously.Wherein, this first response message and second response message all be to send to other AC's in the group of AC pond by a final AC who determines, be used for notifying the discovery request of other these AP of AC in the group of AC pond to be responded, and indicate other AC end to the access process of this AP.This shows, this setting-up time can react each AC to the access capability of the current AP that will insert, if the load pressure of current AC is very big, then Dui Ying setting-up time can be longer relatively, so that responded the discovery request of this AP by other AC in the group of AC pond in this setting-up time.AP passes through to receive the discovery response message that the AC in the group of AC pond sends, thereby obtains the virtual ip address of an AC.
S103:AP sends first ARP message according to the virtual ip address of an AC to an AC;
After AP receives the discovery response message that an AC sends, send first address resolution protocol (Address Resolution Protocol, ARP) message according to the virtual ip address of an AC who carries in this message to an AC.
S104:AP receives the arp response message that an AC sends, the media access control MAC address of carrying an AC in this arp response message;
The one AC sends to AP with the arp response message of carrying the media access control MAC address of an AC, so that AP obtains the MAC Address of an AC after receiving an ARP message of AP transmission.
S105:AP is two layers of destination address with the MAC Address of an AC, is that three layers of destination address are initiated wireless access to an AC with the virtual ip address of an AC;
After AP gets access to the virtual ip address and MAC Address of an AC, being two layers of destination address with the MAC Address of an AC, is that three layers of destination address are initiated wireless access to an AC with the virtual ip address of an AC.This concrete wireless access can be the CAPWAP(Control And Provisioning of Wireless Access Points Protocol Specification of standard) the connection flow process, after setting up CAPWAP connection tunnel, just can carry out proper communication.
Further, present embodiment gives AP and is equipped with changing method from the heat that an AC switches to the 2nd AC on the basis of the method that provides above-mentioned AP access AC, comprising:
AP is maintaining the connection with an AC, and when carrying out proper communication, if an AC breaks down, this AP can also receive the 2nd ARP message that the 2nd AC sends, and the 2nd ARP message carries the MAC Address of the 2nd AC, and the 2nd AC is the standby AC of an AC;
After this AP receives the 2nd ARP message that the 2nd AC initiatively sends, MAC Address with the 2nd AC that carries in the 2nd ARP message is two layers of destination address, while is three layers of destination address with the virtual ip address of an AC still, the wireless access of this AP to the AC is switched on the 2nd AC, be equipped with switching thereby finished AP from the heat that an AC switches to the 2nd AC.
Wireless access control method provided by the invention, wireless access point AP is found request message to each the AC broadcasting in the group of Radio Access Controller AC pond; What the AC in the group of AC pond did not receive in the setting-up time of determining according to local loading condition that other AC send in the group of AC pond first has sent to this AP behind the response message and has found response message, and other AC in the group of AC pond send second response message; Carry the virtual Internet protocol IP address of an AC in this discovery response message, AP sends first ARP message according to the virtual ip address of finding in the response message to an AC; After the one AC receives an ARP message, send arp response message to AP, this arp response message is carried the media access control MAC address of an AC; AP is two layers of destination address with the MAC Address of an AC, be that three layers of destination address are initiated wireless access to an AC with the virtual ip address of an AC, has improved the success rate that AP inserts AC.
Fig. 2 is the flow chart of another embodiment of wireless access control method provided by the invention, and as shown in Figure 2, the executive agent of following steps can be Radio Access Controller.This wireless access control method specifically comprises:
S201, the AC in the group of Radio Access Controller AC pond receive the discovery request message of wireless access point AP broadcasting;
Wherein, one group of AC that Radio Access Controller AC pond group can be made up of several AC, grouping can wait to divide according to the geographical position usually.When wireless access point AP needs and AC when connecting, at first each AC in this AC pond group sends with the forms of broadcasting and finds request message, so that the AC for oneself providing wireless access to serve to be provided.And the AC that responds this discovery request at last is defined as an AC.
S202, if first response message that an AC does not receive in the setting-up time of determining according to local loading condition that other AC send in the group of AC pond, then an AC send to find that to AP response message and other AC in the group of AC pond send second response message, the virtual Internet protocol IP address of carrying an AC in this discovery response message;
Each AC in the group of AC pond, comprise also that wherein an AC receives the discovery request message of AP broadcasting after, determine a setting-up time according to local loading condition.If current AC does not receive in the group of AC pond that other AC send in this setting-up time first response message, this current AC just sends to AP as an AC and finds response message, the virtual Internet protocol IP address of carrying an AC in this discovery response message so.An AC other AC in the group of AC pond send second response message simultaneously.Wherein, this first response message and second response message all be to send to other AC's in the group of AC pond by a final AC who determines, be used for notifying the discovery request of other these AP of AC in the group of AC pond to be responded, and indicate other AC end to the access process of this AP.This shows, this setting-up time can react each AC to the access capability of the current AP that will insert, if the load pressure of current AC is very big, then Dui Ying setting-up time can be longer relatively, so that responded the discovery request of this AP by other AC in the group of AC pond in this setting-up time.
S203, an AC receives first ARP message that AP sends;
The one AC can receive first ARP message that AP sends after sending the discovery response message to AP, and an ARP message is used for the media access control MAC address that AP asks for an AC.
S204, the one AC sends arp response message to AP, carrying the media access control MAC address of an AC in this arp response message, so that AP is two layers of destination address with the MAC Address of an AC, is that three layers of destination address are initiated wireless access to an AC with the virtual ip address of an AC;
After the one AC receives an ARP message of AP transmission, send arp response message, the media access control MAC address of carrying an AC in this arp response message to this AP; Acquire the virtual ip address and MAC Address of an AC as AP after, just can be two layers of destination address with the MAC Address of an AC, be that three layers of destination address are initiated wireless access to an AC with the virtual ip address of an AC.This concrete wireless access can be that the CAPWAP of standard connects flow process, after setting up CAPWAP and connecting the tunnel, just can carry out proper communication.
Further, in present embodiment step 202, the one AC determines that according to local loading condition the method for described setting-up time can be: the time relation at the setting of local loading condition and default loading condition correspondence in various degree determines, or the loading condition of the situation of local load and other AC back of making comparisons is being set.Adopt the prerequisite of this method just to need each AC in the group of AC pond to transmit local loading condition information mutually.In this explanation, an AC is determined that according to local loading condition the concrete grammar of described setting-up time is not limited.And a kind of specific implementation that adopts in this programme is: an AC determines the current priority of an AC according to local loading condition, and determines setting-up time according to the height of current priority.For example, when an AC judges that local loading condition is low weight, then can the current priority of this AC arrange higher relatively, and can pre-set for the definition of priority, can allow the setting-up time of the corresponding certain hour scope of every grade of priority, priority is more high, time range is more short, priority is more low, time range is more long, and each priority time corresponding scope does not have overlapping, is that 1 grade of (higher) corresponding setting-up time is 1～3 second as priority, and priority is that 2 grades of (lower) corresponding setting-up times are 4～6 seconds.And conflict for the setting-up time that prevents two or more same priorities sends, how long be specially in the setting-up time scope of determining current AC priority level correspondence is at random, when being 1 grade as the priority as two AC, the setting-up time that they are determined can be arbitrary duration in 1～3 second, has avoided the problem of AC conflict when corresponding AP finds request of two or more same priorities thus.
Further again, present embodiment inserts on the basis of AC at above-mentioned realization AP, gives AP from a kind of specific implementation method that an AC switches to the 2nd AC, comprising:
The one AC periodically sends backup information to the 2nd AC, so that the 2nd AC when an AC breaks down, sends the 2nd ARP message to AP, the 2nd ARP message carries the MAC Address of the 2nd AC, and the 2nd AC is the standby AC of a described AC;
Particularly, in order to make an AC when breaking down, the connection of the AP on this AC is switched to other AC upward do not gone offline by the wireless user that this AP inserts with realization, this just need distribute a standby AC for each AC, in actual scene, any two AC in the group of AC pond can be standby each other.Here said the 2nd AC is the standby AC of an AC.When an AC carries out regular traffic, can pass through the link detecting technology as the 2nd standby AC, (Bidirectional Forwarding Detection BFD) carries out link detecting to an AC as two-way forwarding detection.After detecting an AC and breaking down, the AP that the 2nd AC can be initiatively connects under this AC sends the 2nd ARP message, and the 2nd ARP message carries the MAC Address of the 2nd AC.After AP receives the 2nd ARP message that the 2nd AC initiatively sends, the MAC Address of the 2nd AC that the MAC Address of the one AC of this locality storage is updated to, thereby making AP is two layers of destination address with the MAC Address of the 2nd AC, virtual ip address with an AC is three layers of destination address, and the wireless access of AP to the AC is switched to the 2nd AC.And in order to make professional smooth and easy after the switching, an AC wants periodically to send backup information to the 2nd AC, and this backup information can comprise the information of the AP that an AC has connected and user profile etc.
Wireless access control method provided by the invention, wireless access point AP is found request message to each the AC broadcasting in the group of Radio Access Controller AC pond; What the AC in the group of AC pond did not receive in the setting-up time of determining according to local loading condition that other AC send in the group of AC pond first has sent to this AP behind the response message and has found response message, and other AC in the group of AC pond send second response message; Carry the virtual Internet protocol IP address of an AC in this discovery response message, AP sends first ARP message according to the virtual ip address of finding in the response message to an AC; After the one AC receives an ARP message, send arp response message to AP, this arp response message is carried the media access control MAC address of an AC; AP is two layers of destination address with the MAC Address of an AC, be that three layers of destination address are initiated wireless access to an AC with the virtual ip address of an AC, has improved the success rate that AP inserts AC.
Fig. 3 is the flow chart of another embodiment of wireless access control method provided by the invention, as shown in Figure 3, the executive agent of following steps comprises WAP (wireless access point) and Radio Access Controller, Fig. 4 is the system architecture diagram of a kind of concrete application scenarios of this method, this system architecture comprises as shown in Figure 4, the AP41 of several WAP (wireless access point), several Radio Access Controller AC42 and access network 43, convergence switch 44.This wireless access control method specifically comprises:
S301, wireless access point AP is found request message to each the AC broadcasting in the group of Radio Access Controller AC pond;
Wherein, one group of AC that Radio Access Controller AC pond group can be made up of several AC comprises AC1～ACN as shown in Figure 3, and grouping can wait to divide according to the geographical position usually.When wireless access point AP needs and AC when connecting, at first each AC in this AC pond group sends with the forms of broadcasting and finds request message, so that the AC for oneself providing wireless access to serve to be provided.And the AC that responds this discovery request at last is defined as an AC, in the present embodiment, carries out subsequent step with AC1 as an AC.
S302, an AC determines setting-up time according to local loading condition;
The one AC determines that according to local loading condition the method for setting-up time can be: the time relation at the setting of local loading condition and default loading condition correspondence in various degree determines, or the loading condition of the situation of local load and other AC back of making comparisons is being set.Adopt the prerequisite of this method just to need each AC in the group of AC pond to transmit local loading condition information mutually.In this explanation, an AC is determined that according to local loading condition the concrete grammar of described setting-up time is not limited.And a kind of specific implementation that adopts in this programme is: an AC determines the current priority of an AC according to local loading condition, and determines setting-up time according to the height of current priority.For example, when an AC judges that local loading condition is low weight, then can the current priority of this AC arrange higher relatively, and can pre-set for the definition of priority, can allow the setting-up time of the corresponding certain hour scope of every grade of priority, priority is more high, time range is more short, priority is more low, time range is more long, and each priority time corresponding scope does not have overlapping, is that 1 grade of (higher) corresponding setting-up time is 1～3 second as priority, and priority is that 2 grades of (lower) corresponding setting-up times are 4～6 seconds.And conflict for the setting-up time that prevents two or more same priorities sends, how long be specially in the setting-up time scope of determining current AC priority level correspondence is at random, when being 1 grade as the priority as two AC, the setting-up time that they are determined can be arbitrary duration in 1～3 second, has avoided the problem of AC conflict when corresponding AP finds request of two or more same priorities thus.
S303, if first response message that an AC does not receive in the setting-up time of determining according to local loading condition that other AC send in the group of AC pond, then an AC send to find that to AP response message and other AC in the group of AC pond send second response message, the virtual Internet protocol IP address of carrying an AC in this discovery response message;
Each AC in the group of AC pond wherein also comprises an AC(AC1) receive the discovery request message of AP broadcasting after, determine a setting-up time according to local loading condition.If current AC does not receive in the group of AC pond that other AC send in this setting-up time first response message, this current AC just sends to AP as an AC and finds response message, the virtual Internet protocol IP address of carrying an AC in this discovery response message so.An AC other AC in the group of AC pond send second response message simultaneously.Wherein, this first response message and second response message all be to send to other AC's in the group of AC pond by a final AC who determines, be used for notifying the discovery request of other these AP of AC in the group of AC pond to be responded, and indicate other AC end to the access process of this AP.This shows, this setting-up time can react each AC to the access capability of the current AP that will insert, if the load pressure of current AC is very big, then Dui Ying setting-up time can be longer relatively, so that responded the discovery request of this AP by other AC in the group of AC pond in this setting-up time.
S304:AP sends first ARP message according to the virtual ip address of an AC to an AC;
After AP receives the discovery response message that an AC sends, send first address resolution protocol (Address Resolution Protocol, ARP) message according to the virtual ip address of an AC who carries in this message to an AC.
S305, an AC sends arp response message, the media access control MAC address of carrying an AC in this arp response message to AP;
After the one AC receives an ARP message of AP transmission, send arp response message, the media access control MAC address of carrying an AC in this arp response message to this AP.
S306, AP is two layers of destination address with the MAC Address of an AC, is that three layers of destination address are initiated wireless access to an AC with the virtual ip address of an AC;
After AP gets access to the virtual ip address and MAC Address of an AC, being two layers of destination address with the MAC Address of an AC, is that three layers of destination address are initiated wireless access to an AC with the virtual ip address of an AC.This concrete wireless access can be the CAPWAP(Control And Provisioning of Wireless Access Points Protocol Specification of standard) the connection flow process, after setting up CAPWAP connection tunnel, just can carry out proper communication.
S307, an AC periodically sends backup information to the 2nd AC, so that the 2nd AC when an AC breaks down, sends the 2nd ARP message to AP, the 2nd ARP message carries the MAC Address of the 2nd AC, the 2nd AC is the standby AC of a described AC;
Particularly, in order to make an AC when breaking down, the connection of the AP on this AC is switched to other AC upward do not gone offline by the wireless user that this AP inserts with realization, this just need distribute a standby AC for each AC, in actual scene, any two AC in the group of AC pond can be standby each other.Here said the 2nd AC is the standby AC of an AC.When an AC carries out regular traffic, can pass through the link detecting technology as the 2nd standby AC, as the BFD technology the one AC is carried out link detecting.After detecting an AC and breaking down, the AP that the 2nd AC can be initiatively connects under this AC sends the 2nd ARP message, and the 2nd ARP message carries the MAC Address of the 2nd AC.And in order to make professional smooth and easy after the switching, an AC wants periodically to send backup information to the 2nd AC, and this backup information can comprise the information of the AP that an AC has connected and user profile etc.
S308, AP receive the 2nd ARP message that the 2nd AC sends, and the 2nd ARP message carries the MAC Address of the 2nd AC, and the 2nd AC is the standby AC of an AC;
When an AC is detected when breaking down, the AP that is connected with an AC can receive the 2nd ARP message that the 2nd AC sends, and the 2nd ARP message carries the MAC Address of the 2nd AC, and the 2nd AC is the standby AC of an AC.
S309, AP is two layers of destination address with the MAC Address of the 2nd AC that carries in the 2nd ARP message, be three layers of destination address with the virtual ip address of an AC still simultaneously, the wireless access of this AP to the AC is switched to the 2nd AC, be equipped with from the heat of an AC to the two AC and switch to finish AP.
Wireless access control method provided by the invention, wireless access point AP is found request message to each the AC broadcasting in the group of Radio Access Controller AC pond; What the AC in the group of AC pond did not receive in the setting-up time of determining according to local loading condition that other AC send in the group of AC pond first has sent to this AP behind the response message and has found response message, and other AC in the group of AC pond send second response message; Carry the virtual Internet protocol IP address of an AC in this discovery response message, AP sends first ARP message according to the virtual ip address of finding in the response message to an AC; After the one AC receives an ARP message, send arp response message to AP, this arp response message is carried the media access control MAC address of an AC; AP is two layers of destination address with the MAC Address of an AC, be that three layers of destination address are initiated wireless access to an AC with the virtual ip address of an AC, has improved the success rate that AP inserts AC.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each method embodiment can be finished by the relevant hardware of program command.Aforesaid program can be stored in the computer read/write memory medium.This program is carried out the step that comprises above-mentioned each method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Fig. 5 is the structural representation of an embodiment of WAP (wireless access point) provided by the invention.This WAP (wireless access point) can be with wireless user's data service by being linked into wireless network with being connected of AC, and can carry out as shown in Figure 1 method step and part method step shown in Figure 3, this WAP (wireless access point) comprises: sending module 51, receiver module 52 and radio access module 53, wherein:
Sending module 51 is used for finding request message to each AC broadcasting of Radio Access Controller AC pond group;
Receiver module 52, the discovery response message that is used for the AC transmission of reception AC pond group, carry the virtual Internet protocol IP address of an AC in this discovery response message, what an AC did not receive in the setting-up time of determining according to local loading condition that other AC send in the group of AC pond first has sent to AP behind the response message and has found that response message and other AC in the group of AC pond send second response message;
Sending module 51 also is used for sending first ARP message according to the virtual ip address of an AC to an AC;
Receiver module 52 also is used for receiving the arp response message that an AC sends, the media access control MAC address of carrying an AC in this arp response message;
Particularly, when wireless access point AP needs and AC when connecting, at first send discovery request message to each AC in the group of AC pond with the forms of broadcasting by sending module 51; The concrete implementation of this step can be referring to the corresponding contents of step 101.
After sending module 51 sends the discovery request message to each AC in the group of AC pond with the forms of broadcasting, can receive the discovery response message that the AC in the group of AC pond sends through receiver module 52, carry the virtual Internet protocol IP address of an AC in this discovery response message, what an AC did not receive in the setting-up time of determining according to local loading condition that other AC send in the group of AC pond first has sent to AP behind the response message and has found that response message and other AC in the group of AC pond send second response message; The concrete implementation of this step can be referring to the corresponding contents of step 102.
After receiver module 52 receives the discovery response message that the AC in the group of AC pond sends, send first ARP message by sending module 51 to an AC according to the virtual ip address of an AC who carries in this message; The concrete implementation of this step can be referring to the corresponding contents of step 103.
After sending module 51 sends first ARP message to an AC, receive the arp response message that an AC sends, the media access control MAC address of carrying an AC in this arp response message through receiver module 52; The concrete implementation of this step can be referring to the corresponding contents of step 104.
After receiver module 52 receives the arp response message of AC transmission, MAC Address with the AC that carries in this message is two layers of destination address, is that three layers of destination address are initiated wireless access by radio access module 53 to an AC with the virtual ip address of the AC that obtains before; The concrete implementation of this step can be referring to the corresponding contents of step 105.
Further, each functional module of present embodiment gives AP and is equipped with changing method from the heat that an AC switches to the 2nd AC on the basis of the method that provides above-mentioned AP access AC, comprising:
AP is maintaining the connection with an AC, when carrying out proper communication, if an AC breaks down, this AP can also receive the 2nd ARP message that the 2nd AC sends by receiver module 52, the 2nd ARP message carries the MAC Address of the 2nd AC, and the 2nd AC is the standby AC of an AC;
This AP is after receiver module 52 receives the 2nd ARP message that the 2nd AC initiatively sends, MAC Address with the 2nd AC that carries in the 2nd ARP message is two layers of destination address, while is three layers of destination address with the virtual ip address of an AC still, the wireless access of this AP to the AC is switched on the 2nd AC by radio access module 53, be equipped with switching thereby finished AP from the heat that an AC switches to the 2nd AC.
WAP (wireless access point) provided by the invention, wireless access point AP is found request message to each the AC broadcasting in the group of Radio Access Controller AC pond; What the AC in the group of AC pond did not receive in the setting-up time of determining according to local loading condition that other AC send in the group of AC pond first has sent to this AP behind the response message and has found response message, and other AC in the group of AC pond send second response message; Carry the virtual Internet protocol IP address of an AC in this discovery response message, AP sends first ARP message according to the virtual ip address of finding in the response message to an AC; After the one AC receives an ARP message, send arp response message to AP, this arp response message is carried the media access control MAC address of an AC; AP is two layers of destination address with the MAC Address of an AC, be that three layers of destination address are initiated wireless access to an AC with the virtual ip address of an AC, has improved the success rate that AP inserts AC.
Fig. 6 is the structural representation of an embodiment of Radio Access Controller provided by the invention, this Radio Access Controller can be controlled the access of AP, and be linked into wireless network with AP with being connected of AC with wireless user's data service is logical, and can carry out as shown in Figure 2 method step and part method step shown in Figure 3, this Radio Access Controller comprises: receiver module 61, sending module 62 and determination module 63, wherein:
Receiver module 61 is used for receiving the discovery request message that wireless access point AP is broadcasted;
Sending module 62, be used for if first response message that receiver module 61 does not receive in the setting-up time that determination module 63 is determined according to local loading condition that other AC send in the group of AC pond, then send to find that to AP response message and other AC in the group of AC pond send second response message, the virtual Internet protocol IP address of carrying an AC in this discovery response message;
This receiver module 61 also is used for receiving first ARP message that AP sends;
This sending module 62, also be used for sending arp response message to AP, the MAC Address of carrying an AC in this arp response message so that AP is two layers of destination address with the MAC Address of an AC, is that three layers of destination address are initiated wireless access to an AC with the virtual ip address of an AC.
Particularly, when wireless access point AP needs and AC when connecting, each AC in the group of AC pond comprises an AC, at first receives AP with the discovery request message of forms of broadcasting transmission by receiver module 61; The concrete implementation of this step can be referring to the corresponding contents of step 201.
If first response message that the receiver module 61 among the AC does not receive in the setting-up time that determination module 63 is determined according to local loading condition that other AC send in the group of AC pond, then the sending module 62 of an AC send to find that to AP response message and other AC in the group of AC pond send second response message, the virtual Internet protocol IP address of carrying an AC in this discovery response message; The concrete implementation of this step can be referring to the corresponding contents of step 202.
The one AC can receive first ARP message that AP send through receiver module 61 after sending the discovery response message to AP; The concrete implementation of this step can be referring to the corresponding contents of step 203.
After the receiver module 61 of the one AC receives an ARP message of AP transmission, send arp response message through sending module 62 to AP, carry the media access control MAC address of an AC in this arp response message, so that AP is two layers of destination address with the MAC Address of an AC, be that three layers of destination address are initiated wireless access to an AC with the virtual ip address of an AC; The concrete implementation of this step can be referring to the corresponding contents of step 204.
Further, at present embodiment determination module 63, the method of determining described setting-up time according to local loading condition can be: determine at local loading condition and the time relation of the setting of the loading condition correspondence of presetting in various degree, or the loading condition of the situation of local load and other AC back of making comparisons set, adopt the prerequisite of this method just to need each AC in the group of AC pond to transmit local loading condition information mutually.In this explanation, an AC is determined that according to local loading condition the concrete grammar of described setting-up time is not limited.And a kind of specific implementation that adopts in this programme is: determination module 63 is determined the current priority of an AC according to local loading condition, and determines setting-up time according to the height of current priority.For example, when an AC judges that local loading condition is low weight, then can the current priority of this AC arrange higher relatively, and can pre-set for the definition of priority, can allow the setting-up time of the corresponding certain hour scope of every grade of priority, priority is more high, time range is more short, priority is more low, time range is more long, and each priority time corresponding scope does not have overlapping, is that 1 grade of (higher) corresponding setting-up time is 1～3 second as priority, and priority is that 2 grades of (lower) corresponding setting-up times are 4～6 seconds.And conflict for the setting-up time that prevents two or more same priorities sends, how long be specially in the setting-up time scope of determining current AC priority level correspondence is at random, when being 1 grade as the priority as two AC, the setting-up time that they are determined can be arbitrary duration in 1～3 second, has avoided the problem of AC conflict when corresponding AP finds request of two or more same priorities thus.
Further again, present embodiment above-mentioned functions module gives AP from a kind of specific implementation method that an AC switches to the 2nd AC realizing that AP inserts on the basis of AC, comprising:
The sending module 62 of the one AC periodically sends backup information to the 2nd AC, so that the 2nd AC when an AC breaks down, sends the 2nd ARP message to AP, the 2nd ARP message carries the MAC Address of the 2nd AC, and the 2nd AC is the standby AC of a described AC;
Particularly, in order to make an AC when breaking down, the connection of the AP on this AC is switched to other AC upward do not gone offline by the wireless user that this AP inserts with realization, this just need distribute a standby AC for each AC, in actual scene, any two AC in the group of AC pond can be standby each other.Here said the 2nd AC is the standby AC of an AC.When an AC carries out regular traffic, can pass through the link detecting technology as the 2nd standby AC, (Bidirectional Forwarding Detection BFD) carries out link detecting to an AC as two-way forwarding detection.After detecting an AC and breaking down, the AP that the 2nd AC can be initiatively connects under this AC sends the 2nd ARP message, and the 2nd ARP message carries the MAC Address of the 2nd AC.After AP receives the 2nd ARP message that the 2nd AC initiatively sends, the MAC Address of the 2nd AC that the MAC Address of the one AC of this locality storage is updated to, thereby making AP is two layers of destination address with the MAC Address of the 2nd AC, virtual ip address with an AC is three layers of destination address, and the wireless access of AP to the AC is switched to the 2nd AC.And in order to make professional smooth and easy after the switching, the sending module 62 of an AC is wanted periodically to send backup information to the 2nd AC, and this backup information can comprise the information of the AP that an AC has connected etc.
Radio Access Controller provided by the invention, wireless access point AP is found request message to each the AC broadcasting in the group of Radio Access Controller AC pond; What the AC in the group of AC pond did not receive in the setting-up time of determining according to local loading condition that other AC send in the group of AC pond first has sent to this AP behind the response message and has found response message, and other AC in the group of AC pond send second response message; Carry the virtual Internet protocol IP address of an AC in this discovery response message, AP sends first ARP message according to the virtual ip address of finding in the response message to an AC; After the one AC receives an ARP message, send arp response message to AP, this arp response message is carried the media access control MAC address of an AC; AP is two layers of destination address with the MAC Address of an AC, be that three layers of destination address are initiated wireless access to an AC with the virtual ip address of an AC, has improved the success rate that AP inserts AC.
It should be noted that at last: above each embodiment is not intended to limit only in order to technical scheme of the present invention to be described; Although the present invention has been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a wireless access control method is characterized in that, comprising:
Wireless access point AP is found request message to each the AC broadcasting in the group of Radio Access Controller AC pond;
Described AP receives the discovery response message that the AC in the group of described AC pond sends, carry the virtual Internet protocol IP address of a described AC in the described discovery response message, what a described AC did not receive in the setting-up time of determining according to local loading condition that other AC send in the group of described AC pond first has sent to described AP behind the response message and has found that response message and other AC in the group of described AC pond send second response message;
Described AP sends first ARP message according to the virtual ip address of a described AC to a described AC;
Described AP receives the arp response message that a described AC sends, the media access control MAC address of carrying a described AC in the described arp response message;
Described AP is two layers of destination address with the MAC Address of a described AC, is that three layers of destination address are initiated wireless access to a described AC with the virtual ip address of a described AC.
2. method according to claim 1 is characterized in that, described AP is two layers of destination address with the MAC Address of a described AC, with the virtual ip address of a described AC be three layers of destination address after a described AC initiates to connect, described method also comprises:
Described AP receives the 2nd ARP message that the 2nd AC sends, and described the 2nd ARP message carries the MAC Address of described the 2nd AC, and described the 2nd AC is the standby AC of a described AC;
Described AP is two layers of destination address with the MAC Address of described the 2nd AC, is three layers of destination address with the virtual ip address of a described AC, and described AP is switched to described the 2nd AC to the wireless access of a described AC.
3. a wireless access control method is characterized in that, comprising:
AC in the group of Radio Access Controller AC pond receives the discovery request message of wireless access point AP broadcasting;
If first response message that a described AC does not receive in the setting-up time of determining according to local loading condition that other AC send in the group of described AC pond, then a described AC sends to described AP and finds that response message and other AC in the group of described AC pond send second response message, the virtual Internet protocol IP address of carrying a described AC in the described discovery response message;
A described AC receives first ARP message that described AP sends;
A described AC sends arp response message to described AP, carry the media access control MAC address of a described AC in the described arp response message, so that described AP is two layers of destination address with the MAC Address of a described AC, be that three layers of destination address are initiated wireless access to a described AC with the virtual ip address of a described AC.
4. method according to claim 3 is characterized in that, a described AC determines that according to local loading condition described setting-up time comprises:
A described AC determines the current priority of a described AC according to local loading condition, and determines described setting-up time according to the height of described current priority.
5. according to claim 3 or 4 described methods, it is characterized in that a described AC also comprises after described AP sends arp response message:
A described AC periodically sends backup information to the 2nd AC, so that described the 2nd AC is when a described AC breaks down, send the 2nd ARP message to described AP, described the 2nd ARP message carries the MAC Address of described the 2nd AC, and described the 2nd AC is the standby AC of a described AC.
6. a wireless access point AP is characterized in that, comprising: sending module, receiver module and radio access module;
Described sending module is used for finding request message to each AC broadcasting of Radio Access Controller AC pond group;
Described receiver module, the discovery response message that is used for the AC transmission of the described AC of reception pond group, carry the virtual Internet protocol IP address of a described AC in the described discovery response message, what a described AC did not receive in the setting-up time of determining according to local loading condition that other AC send in the group of described AC pond first has sent to described AP behind the response message and has found that response message and other AC in the group of described AC pond send second response message;
Described sending module also is used for sending first ARP message according to the virtual ip address of a described AC to a described AC;
Described receiver module also is used for receiving the arp response message that a described AC sends, the media access control MAC address of carrying a described AC in the described arp response message;
Described radio access module, the MAC Address that is used for a described AC is two layers of destination address, is that three layers of destination address are initiated wireless access to a described AC with the virtual ip address of a described AC.
7. wireless access point AP according to claim 6 is characterized in that, comprising:
Described receiver module also is used for receiving the 2nd ARP message that the 2nd AC sends, and described the 2nd ARP message carries the MAC Address of described the 2nd AC, and described the 2nd AC is the standby AC of a described AC;
Described radio access module, the MAC Address that also is used for described the 2nd AC is two layers of destination address, is three layers of destination address with the virtual ip address of a described AC, and described AP is switched to described the 2nd AC to the wireless access of a described AC.
8. a Radio Access Controller AC is characterized in that, comprising: receiver module, sending module and determination module;
Described receiver module is used for receiving the discovery request message that wireless access point AP is broadcasted;
Described sending module, be used for if first response message that described receiver module does not receive in the setting-up time that described determination module is determined according to local loading condition that other AC send in the group of described AC pond, then send to described AP and find that response message and other AC in the group of described AC pond send second response message, the virtual Internet protocol IP address of carrying an AC in the described discovery response message;
Described receiver module also is used for receiving first ARP message that described AP sends;
Described sending module, also be used for sending arp response message to described AP, the MAC Address of carrying a described AC in the described arp response message, so that described AP is two layers of destination address with the MAC Address of a described AC, be that three layers of destination address are initiated wireless access to a described AC with the virtual ip address of a described AC.
9. Radio Access Controller AC according to claim 8 is characterized in that, described determination module specifically is used for:
Determine the current priority of a described AC according to local loading condition, and determine described setting-up time according to the height of described current priority.
10. it is characterized in that according to Claim 8 or 9 described Radio Access Controller AC:
Described sending module, also be used for periodically sending backup information to the 2nd AC, so that described the 2nd AC is when a described AC breaks down, send the 2nd ARP message to described AP, described the 2nd ARP message carries the MAC Address of described the 2nd AC, and described the 2nd AC is the standby AC of a described AC.
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