WO2015051552A1

WO2015051552A1 - Tunnel status processing method, device and system

Info

Publication number: WO2015051552A1
Application number: PCT/CN2013/085145
Authority: WO
Inventors: 杨晖; 唐厚成; 甄斌
Original assignee: 华为技术有限公司
Priority date: 2013-10-12
Filing date: 2013-10-12
Publication date: 2015-04-16
Also published as: CN105191485B; CN105191485A

Abstract

Provided in an embodiment of the present invention are a tunnel status processing method, device and system. The tunnel status processing method comprises: a station (STA) and wireless termination points (WTP) establish a second control and provisioning of wireless access point (CAPWAP) tunnel to enable an access controller (AC) to interact with an STA through a first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC; if the STA receives a tunnel change message sent by the WTP, then determining that the CAPWAP tunnel is abnormal; and the STA no longer interacts with the AC by sending a CAPWAP message through the first CAPWAP tunnel and the second CAPWAP tunnel, the first CAPWAP tunnel being an original CAPWAP tunnel between a first WTP and the AC. Thus, STA can stop interaction with the AC after learning that the tunnel is abnormal, reducing unnecessary information interaction and resource waste.

Description

Tunnel state processing method, device and system

Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a tunnel state processing method, apparatus, and system.

Background technique

With the rapid development of the Internet, a centralized wireless local area network (WLAN) architecture emerged. It manages multiple Wireless Termination Points (WTP) through an Access Controller (AC). 802.11 Protocol and Control Access Point of Wireless Access Point can be used between WTP and AC. , CAPWAP), where WTP is a device that allows wireless devices to access the wired network through 802.11 or related standards. Usually WTP is connected to the wired network as a standalone device through a connection router, or WTP can also integrate router functions. The AC manages a large number of WTP entities through the network administrator or the network operation center to complete the configuration, authentication, and security management of the WTP devices. Under this architecture, WTP is mainly used to receive and send wireless network data. After the AC receives the wireless data sent by the WTP and completes the corresponding processing, it will send the processed data to the local area network or the Internet.

Currently, wireless Fidelity (WiFi) devices of various operators are deployed more and more densely as stations (STAs) in the WLAN architecture, and STAs between operators are very overlapped. The STA is a device that includes the IEEE 802.il protocol to access the wireless medium. The STA needs to access the 802.11 protocol through the WTP access in the communication network. However, WTP or AC cannot effectively manage a large number of STAs under the 802.11 protocol. The unmanaged state of the STA may cause signal interference and resource scheduling. Moreover, the STA has limited capabilities. For other parts of the network architecture, such as WTP or AC, when there is an abnormality, there is a lack of sensing and coping mechanism. When an abnormality occurs, the STA still sends information to the outside, resulting in waste of resources. Summary of the invention The embodiment of the present invention provides a tunnel state processing method, device, and system. The STA can no longer interact with the AC when the tunnel abnormality is learned, reducing unnecessary information interaction and reducing resource waste.

A first aspect of the present invention provides a tunnel state processing method, including:

The STA and the wireless terminal station WTP establish a second control wireless access point protocol CAPWAP tunnel, so that the access control point AC passes the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC. The STA interacts;

If the STA receives the tunnel change message sent by the WTP, determining that the first CAPWAP tunnel is abnormal;

The STA does not interact with the AC by sending a CAPWAP message through the first CAPWAP tunnel and the second CAPWAP tunnel, where the first CAPWAP tunnel is an original CAPWAP tunnel between the first WTP and the AC. .

In a first possible implementation manner, after determining the first CAPWAP tunnel abnormality, according to the first aspect, the method further includes:

After the first preset time period, the STA sends an inquiry message to the WTP, where the inquiry message is used to query whether the first CAPWAP tunnel is back to normal.

In a second possible implementation manner, in combination with the first aspect and the first possible implementation manner, the tunnel change message includes a cause of the first CAPWAP tunnel abnormality;

After the STA sends the inquiry message to the WTP after the first preset time period, the STA further includes:

The STA sets the first preset time period according to the reason of the first CAPWAP tunnel abnormality.

In a third possible implementation manner, in combination with the first aspect, the first possible implementation manner, and the second possible implementation manner, the STA sends the query to the WTP after a preset time period. After the message, it also includes:

The STA receives the inquiry message response sent by the WTP, and determines that the first CAPWAP tunnel is normal according to the query response message.

In a fourth possible implementation manner, after determining the first CAPWAP tunnel abnormality, according to the first aspect, the method further includes:

The STA receives the site tunnel ready message sent by the WTP, and determines that the first CAPWAP tunnel is normal according to the site tunnel ready message. In a fifth possible implementation, in combination with the first aspect, the first possible implementation manner, the second possible implementation manner, the third possible implementation manner, and the fourth possible implementation manner, the site After the STA establishes the second control wireless access point protocol CAPWAP tunnel with the wireless terminal station WTP, the method further includes:

The STA switches the state of the tunnel state machine to an operating state;

After the STA determines that the first CAPWAP tunnel is abnormal, or after the STA determines the second CAPWAP tunnel abnormality, the STA further includes:

The STA switches the state of the tunnel state machine from the running state to the non-operation state; if the STA determines that the duration of the first CAPWAP tunnel abnormality exceeds the first preset time period, The state of the tunnel state machine is switched from the non-operational state to the idle state; wherein, when the tunnel state machine is in the running state, the STA sends or receives the CAPWAP message forwarded by the WTP; When the device is in the non-operational state, the STA determines that the first CAPWAP tunnel abnormality or the second CAPWAP tunnel abnormality does not send the CAPWAP message to interact with the AC; the tunnel state machine is the In the idle state, the STA determines that the first CAPWAP tunnel or the second CAPWAP tunnel needs to be established, and does not send the CAPWAP message to interact with the AC.

In a sixth possible implementation manner, after determining that the first CAPWAP tunnel is normal, the STA further includes:

The STA switches the state of the tunnel state machine from the non-operational state to the operational state.

In a seventh possible implementation manner, combining the fifth possible implementation manner and the sixth possible implementation manner, the method further includes:

And if the second CAPWAP tunnel is deleted, the STA switches the state of the tunnel state machine from the non-operation state or the running state to the idle state. A second aspect of the present invention provides a tunnel state maintenance method, including:

The wireless terminal station WTP establishes a second control wireless access point protocol CAPWAP tunnel with the station STA, so that the access control point AC passes the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC. The STA interacts;

If the WTP determines that the first CAPWAP tunnel is abnormal, sending a tunnel to the STA Transmitting the message, so that the STA does not send a CAPWAP message to the AC through the first CAPWAP tunnel and the second CAPWAP tunnel, where the first CAPWAP tunnel is between the first WTP and the AC. There are CAPWAP tunnels.

In a first possible implementation, according to the second aspect, if the WTP determines that the first CAPWAP tunnel is abnormal, sending a tunnel change message to the STA includes:

If the WTP receives the reset request message sent by the AC, the WTP sends the tunnel change message to the STA, where the tunnel change message includes the first CAPWAP tunnel abnormality; or

And the WTP sends the tunnel change message to the STA if the data packet transport layer security protocol DTLS protocol stack is abnormal, and the tunnel change message includes the first CAPWAP tunnel abnormality.

In a second possible implementation, in combination with the second aspect and the first possible implementation manner, after the determining, by the WTP, that the first CAPWAP tunnel is abnormal, sending the tunnel change message to the STA, the method further includes:

The WTP receives an inquiry message sent by the STA, and the inquiry message is used to query whether the first CAPWAP tunnel is back to normal.

If the WTP determines that the first CAPWAP tunnel is normal, the WTP returns an inquiry message response to the STA;

If the WTP determines that the first CAPWAP tunnel is abnormal, the WTP does not return an inquiry message response to the STA.

In a third possible implementation, in combination with the second aspect and the first possible implementation manner, after the determining, by the WTP, that the first CAPWAP tunnel is abnormal, sending the tunnel change message to the STA, the method further includes:

And if the WTP determines that the first CAPWAP tunnel is normal, sending a site tunnel ready message to the STA.

In a fourth possible implementation manner, combining the second aspect, the first possible implementation manner, the second possible implementation manner, and the third possible implementation manner,

After the wireless terminal station WTP establishes a second control wireless access point protocol CAPWAP tunnel with the station STA, the method further includes:

The state of the WTP tunnel state machine is switched from running the RUN state to resetting the RESET. The state or data packet transport layer security protocol link disconnects the DTLS TD state, and then sends a tunnel change message to the STA, where the WTP forwards or receives the AC or the STA when the tunnel state machine is in the RUN state. The CAPWAP message is sent; when the tunnel state machine is in the RESET state and the DTLS TD state, the WTP determines that the first CAPWAP tunnel is abnormal, and does not forward the AC or the STA to send. Said CAPWAP message. According to a third aspect of the present invention, a station STA is provided, including:

a STA tunnel establishing unit, configured to establish a second control wireless access point protocol CAPWAP tunnel with the wireless terminal station WTP, so that the access control point AC passes the first CAPWAP tunnel between the WTP and the AC, and the first The CAPWAP tunnel interacts with the STA;

a STA processing unit, configured to: if the STA receiving unit receives the tunnel change message sent by the WTP, determine that the first CAPWAP tunnel is abnormal; that the STA sending unit does not send the CAPWAP through the first CAPWAP tunnel and the second CAPWAP tunnel The message is exchanged with the AC, and the first CAPWAP tunnel is an original CAPWAP tunnel between the first WTP and the AC.

In a first possible implementation manner, according to the third aspect,

The STA sending unit is configured to send an inquiry message to the WTP after the first preset time period, where the inquiry message is used to query whether the first CAPWAP tunnel is back to normal.

In a second possible implementation, according to the first possible implementation, the method further includes: a time setting unit, configured to receive, according to the STA receiving unit, the first CAPWAP tunnel included in the tunnel change message For the cause of the abnormality, the first preset time period is set.

In a third possible implementation manner, combining the first possible implementation manner and the second possible implementation manner,

The STA receiving unit is further configured to receive an inquiry message response sent by the WTP, and determine, according to the query response message, that the first CAPWAP tunnel returns to normal.

In a fourth possible implementation manner, according to the third aspect,

The STA receiving unit is further configured to receive a site tunnel ready message sent by the WTP, where the STA processing unit is further configured to determine that the first CAPWAP tunnel is normal according to the site tunnel ready message.

In a fifth possible implementation, the third aspect, the first possible implementation, The second possible implementation manner, the third possible implementation manner, and the fourth possible implementation manner also include:

a tunnel state machine, configured to switch to an operating state if a state of establishing a second CAPWAP tunnel with the WTP is performed;

If it is determined that the first CAPWAP tunnel or the second CAPWAP tunnel is abnormal, then switching from the running state to the non-running state;

And if it is determined that the duration of the first CAPWAP tunnel abnormality exceeds the first preset time period, switching from the non-operation state state to the idle state;

When the tunnel state machine is in the running state, the STA sends or receives the CAPWAP message forwarded by the WTP; when the tunnel state machine is in the non-operation state, the STA determines the first The CAPWAP tunnel is abnormal or the second CAPWAP tunnel is abnormal, and the CAPWAP message is not sent to interact with the AC; when the tunnel state machine is in the idle state, the STA determines that the first CAPWAP tunnel needs to be established. Or the second CAPWAP tunnel does not send the CAPWAP message to interact with the AC.

In a sixth possible implementation manner, according to the fifth possible implementation manner,

The tunnel state machine is further configured to switch from the non-operating state to the running state after determining that the first CAPWAP tunnel returns to normal.

In a seventh possible implementation manner, in combination with the fifth possible implementation manner and the sixth possible implementation manner,

The tunnel state machine is further configured to switch from the non-operation state or the operation state to the idle state if the second CAPWAP tunnel is deleted. According to a fourth aspect of the present invention, a wireless terminal station WTP is provided, including:

a WTP tunnel establishing unit, configured to establish a second control radio access point protocol CAPWAP tunnel with the station STA, so that the access control point AC passes the first CAPWAP tunnel and the second CAPWAP between the WTP and the AC The tunnel interacts with the STA;

a WTP processing unit, configured to: if the first CAPWAP tunnel is abnormal, send a tunnel change message to the STA, so that the STA does not send the CAPWAP through the first CAPWAP tunnel and the second CAPWAP tunnel The message interacts with the AC, where the first CAPWAP tunnel is original between the first WTP and the AC CAPWAP tunnel.

In a first possible implementation manner, according to the fourth aspect, the method further includes:

a WTP receiving unit, configured to: when receiving the reset request message generated by the AC, causing the WTP sending unit to send a tunnel change message to the STA, where the tunnel change message includes a cause of the first CAPWAP tunnel abnormality Or,

The WTP processing unit is further configured to: if the data packet transport layer security protocol DTLS protocol stack is abnormal, the WTP sending unit sends the tunnel change message to the STA, where the tunnel change message includes the The cause of the first CAPWAP tunnel exception.

In a second possible implementation, in combination with the fourth aspect and the first possible implementation, the WTP receiving unit is further configured to receive an inquiry message sent by the STA, where the inquiry message is used to query the Whether the first CAPWAP tunnel is restored to normal;

The WTP processing unit is further configured to: if it is determined that the first CAPWAP tunnel is normal, enable the WTP sending unit to return an inquiry message response to the STA;

And the WTP processing unit is further configured to: if the first CAPWAP tunnel is abnormal, the WTP sending unit does not return an inquiry message response to the STA.

In a third possible implementation, in combination with the fourth aspect and the first possible implementation manner, the WTP processing unit is further configured to: if the first CAPWAP tunnel is determined to be normal, to enable the WTP sending unit A site tunnel ready message is sent to the STA.

In a fourth possible implementation, in combination with the fourth aspect, the first possible implementation manner, the second possible implementation manner, the third possible implementation manner, and the fourth possible implementation manner, the method further includes:

a tunnel state machine, configured to: if the switch from the running RUN state to the reset RESET state or the data packet transport layer security protocol link cuts off the DTLS TD state, causing the WTP sending unit to send a tunnel change message to the STA, where When the tunnel state machine is in the RUN state, the WTP forwards or receives the CAPWAP message sent by the AC or the STA; when the tunnel state machine is the RESET state and the DTLS TD state, the WTP Determining the first CAPWAP tunnel abnormality, and not forwarding the CAPWAP message sent by the AC or the STA.

According to a fifth aspect of the present invention, a station STA is provided, including: a STA processor, configured to establish a second control wireless access point protocol CAPWAP tunnel with the wireless terminal station WTP, so that the access control point AC passes the first CAPWAP tunnel and the second between the WTP and the AC The CAPWAP tunnel interacts with the STA;

The STA processor is further configured to: if the STA receiver receives the tunnel change message sent by the WTP, determine that the first CAPWAP tunnel is abnormal; so that the STA transmitter does not pass the first CAPWAP tunnel and the second CAPWAP The tunnel sends a CAPWAP message to interact with the AC. The first CAPWAP tunnel is an original CAPWAP tunnel between the first WTP and the AC.

In a first possible implementation manner, according to the fifth aspect,

The STA transmitter is configured to send an inquiry message to the WTP after the first preset time period, where the inquiry message is used to query whether the first CAPWAP tunnel is back to normal.

In a second possible implementation, according to the first possible implementation, the method further includes: a timer, configured to receive, according to the STA receiver, the first CAPWAP tunnel abnormality included in the tunnel change message The reason is that the first preset time period is set.

The STA receiver is further configured to receive an inquiry message response sent by the WTP, and determine, according to the query response message, that the first CAPWAP tunnel is back to normal.

In a fourth possible implementation manner, according to the fifth aspect,

The STA receiver is further configured to receive the site tunnel ready message sent by the WTP, where the STA processor is further configured to determine that the first CAPWAP tunnel is normal according to the site tunnel ready message.

In a fifth possible implementation, in combination with the fifth aspect, the first possible implementation manner, the second possible implementation manner, the third possible implementation manner, and the fourth possible implementation manner, the method further includes:

The STA processor is further configured to switch to an operating state if a state of establishing a second CAPWAP tunnel with the WTP is performed;

If it is determined that the duration of the first CAPWAP tunnel abnormality exceeds the first preset time period, Switching from the non-operational state to the idle state, wherein, in the operating state, the STA sends or receives the CAPWAP message forwarded by the WTP; when in the non-operation state, the STA determines The first CAPWAP tunnel abnormality or the second CAPWAP tunnel abnormality does not send the CAPWAP message to interact with the AC; when the idle state is, the STA determines that the first CAPWAP tunnel needs to be established or The second CAPWAP tunnel does not send the CAPWAP message to interact with the AC.

The STA processor is further configured to: after determining that the first CAPWAP tunnel returns to normal, switch from the non-operation state to the running state.

And the STA processor is further configured to switch from the non-operation state or the running state to the idle state if the second CAPWAP tunnel is deleted. According to a sixth aspect of the present invention, a wireless terminal station WTP is provided, including:

a WTP processor, configured to establish, by the STA STA, a second control radio access point protocol CAPWAP tunnel, so that the access control point AC passes the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC Interacting with the STA;

The WTP processor is further configured to: if the first CAPWAP tunnel is abnormal, send a WTP sender to send a tunnel change message to the STA, so that the STA does not pass the first CAPWAP tunnel and the second CAPWAP The tunnel sends a CAPWAP message to interact with the AC. The first CAPWAP tunnel is an original CAPWAP tunnel between the first WTP and the AC.

In a first possible implementation manner, according to the sixth aspect, the method further includes:

a WTP receiver, configured to: if receiving a reset request message generated by the AC,

The WTP sender sends a tunnel change message to the STA, where the tunnel change message includes the cause of the first CAPWAP tunnel abnormality; or

The WTP processor is further configured to: if the data packet transport layer security protocol DTLS protocol stack is abnormal, the WTP sender sends the tunnel change message to the STA, where the tunnel change message includes the The cause of the first CAPWAP tunnel exception. In a second possible implementation, in combination with the sixth aspect and the first possible implementation, the WTP receiver is further configured to receive an inquiry message sent by the STA, where the inquiry message is used to query the Whether the first CAPWAP tunnel is restored to normal;

The WTP processor is further configured to: if the first CAPWAP tunnel is determined to be normal, causing the WTP sender to return an inquiry message response to the STA;

The WTP processor is further configured to: if the first CAPWAP tunnel is abnormal, cause the WTP sender not to return an inquiry message response to the STA.

In a third possible implementation, in combination with the sixth aspect and the first possible implementation manner, the WTP processor is further configured to: if the first CAPWAP tunnel is determined to be normal, to enable the WTP transmitter A site tunnel ready message is sent to the STA.

In a fourth possible implementation, in combination with the sixth aspect, the first possible implementation manner, the second possible implementation manner, the third possible implementation manner, and the fourth possible implementation manner, the WTP processing And if the state of the tunnel state machine is switched from the running RUN state to the reset RESET state or the data packet transport layer security protocol link cuts off the DTLS TD state, causing the WTP sender to send a tunnel change message to the STA When the tunnel state machine is in the RUN state, the WTP forwards or receives the CAPWAP message sent by the AC or the STA; when the tunnel state machine is in the RESET state and the DTLS TD state The WTP determines that the first CAPWAP tunnel is abnormal, and does not forward the CAPWAP message sent by the AC or the STA.

In a seventh aspect, a system is provided, comprising:

The station STA of any of the above third aspects and its implementations, and the wireless terminal station WTP of any of the above fourth aspects and implementations thereof. In an eighth aspect, a system is provided, comprising:

The station STA of any of the above fifth aspects and its implementations, and the wireless terminal station WTP of any of the above sixth aspects and implementations thereof. The tunnel state processing method, device, and system provided by the embodiment of the present invention, the STA establishes a second CAPWAP tunnel with the WTP, so that the AC passes the first CAPWAP tunnel between the WTP and the AC. The channel and the second CAPWAP tunnel interact with the STA. If the STA receives the tunnel change message sent by the WTP, the STA determines that the first CAPWAP tunnel is abnormal. The STA does not send the CAPWAP message to interact with the AC through the first CAPWAP tunnel and the second CAPWAP tunnel. The first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC. In this way, by establishing a second CAPWAP tunnel between the WTP and the STA, the STA can learn the tunnel abnormality and no longer interact with the AC when the tunnel is abnormal, reducing unnecessary information interaction and reducing resource waste.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a flowchart of an embodiment of a tunnel state maintenance method according to the present invention;

2 is a flowchart of another embodiment of a tunnel state maintenance method according to the present invention;

3 is a flowchart of still another embodiment of a tunnel state maintenance method according to the present invention;

4 is a flowchart of an embodiment of a tunnel establishment method provided by the present invention;

FIG. 5 is a flowchart of another embodiment of a tunnel establishment method according to the present invention;

6 is a schematic structural diagram of an embodiment of a station STA according to the present invention;

7 is a schematic structural diagram of another embodiment of a station STA according to the present invention;

8 is a schematic structural diagram of still another embodiment of a station STA according to the present invention;

9 is a schematic structural diagram of still another embodiment of a station STA according to the present invention;

10 is a schematic structural diagram of a WTP embodiment of a wireless terminal station according to the present invention;

11 is a schematic structural diagram of another embodiment of a WTP according to the present invention;

12 is a schematic structural diagram of still another embodiment of a WTP according to the present invention;

13 is a schematic structural diagram of still another embodiment of WTP according to the present invention;

14 is a schematic structural diagram of an embodiment of a station STA according to the present invention;

15 is a schematic structural diagram of another embodiment of a station STA according to the present invention;

16 is a schematic structural diagram of a WTP embodiment of a wireless terminal station according to the present invention;

17 is a schematic structural diagram of another embodiment of a WTP according to the present invention;

FIG. 18 is a schematic structural diagram of an embodiment of a tunnel establishment system according to the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be noted that the present invention can be applied to a scenario in which there is at least one STA in the wireless transmission range of the WTP, and the STA can establish a first control wireless access point protocol (Wand and the AC and the AC). , CAPWAP) tunnel, WTP and AC can interact through the first CAPWAP tunnel, and each STA and WTP can communicate through the 802.11 protocol.

1 is a flowchart of an embodiment of a tunnel state maintenance method according to the present invention. As shown in FIG. 1, the method in this embodiment may include:

5101. The STA establishes a second CAPWAP tunnel with the WTP, so that the AC interacts with the STA through the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC.

It should be noted that the communication protocol commonly used between WTP and AC is to control the wireless access point protocol, which is an application layer protocol built on the User Datagram Protocol (UDP). A tunnel is set up between the AC and the WTP to carry control packets and user data packets in the tunnel to facilitate centralized management and protection of user data. The CAPWAP tunnel is divided into a control tunnel and a data tunnel. The control tunnel transmits CAPWAP control packets, and the data tunnel transmits data packets.

Further, the second CAPWAP tunnel between the WTP and the STA may be established by the WTP or by the AC. After the second CAPWAP tunnel is established, the AC may send a CAPWAP packet for controlling the STA to the WTP through the first CAPWAP tunnel, and then The WTP is forwarded to the STA through the second CAPWAP tunnel, so that the AC can send the packet for controlling the STA to the STA, and the WTP can forward the response or the packet of the STA to determine the control effect on the STA, such as the STA. Whether the resource scheduling is reasonable and effective.

S102: If the STA receives the tunnel change message sent by the WTP, the STA determines that the first CAPWAP tunnel is abnormal.

It should be noted that if the STA receives the tunnel change message, the STA may determine the first CAPWAP. The tunnel is abnormal. For example, it can be determined that the WTP is switched from the running RUN state to the reset RESET state or the data packet transport layer security Tear Down state (DTLS TD, Datagram Transport Layer Security Tear Down).

S103: The STA does not use the first CAPWAP tunnel and the second CAPWAP tunnel to send a CAPWAP message to interact with the AC. The first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC.

Further, the WTP can maintain a relatively complex CAPWAP tunnel state machine, and define multiple complex states corresponding to different states of the first CAPWAP tunnel; and because the STA resources are limited, a simple CAPWAP tunnel state machine can be established in the STA. , only maintain a simple state machine. Here, three states can be defined for the STA's tunnel state machine: idle IDLE, run RUN, non-run UNRUN.

The relationship between the tunnel state machine maintained by the STA and the tunnel state machine maintained by the WTP is that the RUN state corresponds completely, and the non-RUN state of the WTP corresponds to the UNRUN state of the STA.

For example, if the STA tunnel status notification message is a tunnel change message, the STA determines that the first CAPWAP tunnel is abnormal. At this time, the state machine maintained by the WTP should be changed from the RUN state to the non-RUN state, such as DTLS TD, and at the same time, the STA The RUN state should be redirected to the UNRUN state. When the STA maintains the UNRUN state, the STA does not send CAPWAP packets to the AC through the WTP or through the WTP. The g卩STA no longer passes the first CAPWAP tunnel and the second CAPWAP tunnel and the AC. Interact.

In the tunnel state processing method provided by the embodiment of the present invention, the STA establishes a second CAPWAP tunnel with the WTP, so that the AC interacts with the STA through the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC; The tunnel change message is used to determine that the first CAPWAP tunnel is abnormal. The STA does not use the first CAPWAP tunnel and the second CAPWAP tunnel to send a CAPWAP message to interact with the AC. The first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC. . In this way, by establishing a second CAPWAP tunnel between the WTP and the STA, the STA can learn the tunnel abnormality, and no longer interact with the AC when the tunnel abnormality is obtained, thereby reducing unnecessary information interaction and reducing resource waste. 2 is a flowchart of another embodiment of a tunnel state maintenance method according to the present invention. The present application is applied to a scenario in which a first CAPWAP tunnel is established between a WTP and an AC, as shown in FIG. 2, The method of an embodiment may include:

5201. The WTP establishes a second CAPWAP tunnel with the STA.

The AC interacts with the STA through the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC.

It should be noted that the WTP and the STA of the station establish a second CAPWAP tunnel, which may be established by WTP control or by AC control.

If the first CAPWAP tunnel is abnormal, the WTP sends a tunnel change message to the STA, so that the STA does not use the first CAPWAP tunnel and the second CAPWAP tunnel to send a CAPWAP message to interact with the AC.

It should be noted that the tunnel status of the first CAPWAP tunnel of the WTP and the AC may be determined according to the message sent by the AC. If the WTP receives the RESET request message sent by the AC, the WTP will switch from the RUN state to the RESET state. After the WTP completes the first CAPWAP restart operation and ends the DTLS session, it may send a RESET response message to the AC, and then the WTP will switch from the RESET state to the DTLS TD state, and after switching to the DTLS TD state, a timer may be started to enable timing. The device continues to switch states when it is timed.

The tunnel condition of the first CAPWAP tunnel of the WTP and the AC is also determined by the WTP according to other messages received or self-detection. For example, the RUN state of the WTP is switched to the DTLS TD state: the state switch occurs in the DTLS protocol stack. Situation, causing a DTLS session to be interrupted. For WTP, this state switch occurs when it receives a DTLS notification message: DTLS Aborted, DTLS Reassembly Failure, or DTLS Peer Disconnect. The DTLS Aborted is used to indicate the establishment of the session suspension; the DTLS Reassembly Failure is used to indicate that the DTLS fragment data reorganization fails; and the DTLS Peer Disconnect is used to indicate that the DTLS session has been disassembled. In addition, when the WTP receives the DTLS Decap Failure notification frequently, it may also cut off the DTLS session and enter the DTLS TD state. The DTLS Decap Failure is used to indicate that the parsing packet fails, and the encryption verification fails. When the retransmission count value of the reliable transmission has reached the retransmission maximum value, WTP also switches from the RUN state to the DTLS TD state. And the above timer will be started after the WTP switches to the DTLS TD state.

Further, in the above two cases, the WTP may send a tunnel status notification message to the STA, where the tunnel status notification message is a tunnel change message, that is, the first CAPWAP tunnel is abnormal.

The tunnel state processing method provided by the embodiment of the present invention, the STA and the WTP establish a second CAPWAP a tunnel, so that the AC interacts with the STA through the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC; if the STA receives the tunnel change message sent by the WTP, the STA determines that the first CAPWAP tunnel is abnormal; the STA does not pass the first The CAPWAP tunnel and the second CAPWAP tunnel send a CAPWAP message to interact with the AC. The first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC. In this way, by establishing a second CAPWAP tunnel between the WTP and the STA, the STA can learn the tunnel abnormality, and no longer interact with the AC when the tunnel abnormality is obtained, thereby reducing unnecessary information interaction and reducing resource waste. FIG. 3 is a flowchart of still another embodiment of a tunnel state maintenance method according to the present invention. The present embodiment is applied to a scenario in which a first CAPWAP tunnel is established between a WTP and an AC. As shown in FIG. 3, the method in this embodiment may include :

5301. The WTP establishes a second CAPWAP tunnel with the STA.

It should be noted that the WTP tunnel state machine can maintain multiple states. After the WTP and the AC establish the first CAPWAP tunnel, the WTP enters the running RUN state. After the WTP and the STA establish the second CAPWAP tunnel, the RUN state is maintained.

5302. The STA establishes a second CAPWAP tunnel with the WTP.

It should be noted that the STA tunnel state machine can maintain three states, which are defined as idle IDLE state, running RUN state, and non-running UNRUN.

If the command to establish a second CAPWAP tunnel is not successfully received, and the second CAPWAP tunnel is deleted, the IDLE state is entered. That is, the state indicates that the WTP does not maintain the state of the STA's CAPWAP tunnel.

Further, the second CAPWAP tunnel may be established by WTP control or may be established by AC control.

For example, FIG. 4 is a flowchart of an embodiment of a tunnel establishment method provided by the present invention. As shown in FIG. 4, a second CAPWAP tunnel may be established by WTP control.

5401. The STA sends a CAPWAP tunnel establishment request to the WTP.

If the CAPWAP tunnel establishment request sent by the STA is received, the WTP determines whether to establish a second CAPWAP tunnel between the WTP and the STA according to at least one of the CAPWAP tunnel establishment request content and the maximum access capability of the WTP. S403; No, then S409 is performed. For example, determining whether to establish a second CAPWAP tunnel between the WTP and the STA according to at least one of the CAPWAP tunnel establishment request content and the maximum access capability of the WTP may be: whether the WTP is correctly determined according to the request condition of the tunnel establishment request, or Whether the format of the tunnel establishment request is correctly determined; or determining whether to permit the establishment of the second CAPWAP tunnel to determine whether to permit the establishment of the second CAPWAP tunnel according to the capability of the WTP; or, when the CAPWAP tunnel establishment request content and the maximum access capability of the WTP satisfy the condition It is determined to establish a second CAPWAP tunnel.

For example, whether the WTP is based on the request condition of the tunnel establishment request, whether the CAPWAP tunnel is established or not, may be determined whether the source STA of the CAPWAP tunnel establishment request is pre-existing in the configurable tunnel list, and the configurable tunnel list may be pre-stored in the WTP. If the source STA is pre-existing, the STA in the tunnel list can be established to determine to permit the establishment of the second CAPWAP tunnel.

For example, the WTP may also determine whether to permit the establishment of the second CAPWAP tunnel according to the format of the tunnel establishment request. The request may be pre-configured in a special format as in the above message. If the WTP determines that the received tunnel establishment request conforms to the preset format, it determines to permit the establishment of the second CAPWAP tunnel.

Alternatively, WTP can also determine whether to permit the establishment of a second CAPWAP tunnel based on the capabilities of the WTP. For example, the capability of the WTP maximum bearer to establish the second CAPWAP tunnel is to establish five second CAPWAP tunnels. The tunnel establishment request of the STA is sent to the WTP after the WTP only establishes one to three second CAPWAP tunnels, and the WTP determines that the WTP can also be The second CAPWAP tunnel carrying one more is allowed to be established; the tunnel establishment request of the STA is sent to the WTP after the WTP establishes 5 second CAPWAP tunnels, and the WTP capability is limited, and the WTP does not permit the establishment of the WTP and the STA. The second CAPWAP tunnel between.

It should be noted that, if the establishment is permitted, the establishment success response may be returned to the STA, and S403 is performed; if the establishment is not permitted, the tunnel establishment failure notification may be returned to the STA, and S412 is performed.

S403. The WTP establishes a second CAPWAP tunnel with the STA.

It should be noted that after the WTP establishes a second CAPWAP tunnel with the STA, the notification message for notifying the establishment of the second CAPWAP tunnel may be sent to the AC. The notification message may also be carried in a CAPWAP message conforming to the above CAPWAP message format.

S404. The AC sends a CAPWAP message to the WTP.

Further, the CAPWAP message includes the CAPWAP control packet or data sent by the AC. The packet is configured to perform resource scheduling on the STA. The CAPWAP message further includes the identifier information. The identifier information is generated by the WTP or the STA when the first CAPWAP tunnel or the second CAPWAP tunnel is established.

The identifier information may be address information or a preset identifier. The identification information is used to cause the WTP to determine whether the CAPWAP message is a message sent to the STA or a whitespace s sent to the WTP.

Further, the AC may also receive the CAPWAP message sent by the WTP, or the CAPWAP message sent by the WTP-transferred STA, and the CAPWAP message may include the identification information, so that the AC determines the source of the CAPWAP message, and the description is not extended here.

It should be noted that the CAPWAP message includes the description described in the foregoing embodiment.

For the CAPWAP packet, such as the control packet and the data packet, the format and the content of the CAPWAP packet can be described in the foregoing embodiment, and details are not described herein.

5405. The WTP receives the CAPWAP message sent by the AC.

5406. The WTP determines, according to the identifier information in the CAPWAP message, whether the CAPWAP message is sent to the STA.

Further, the WTP determines, according to the identifier information included in the CAPWAP message, whether the CAPWAP message is a message sent to the STA. If the identifier information is the address information, and the address information is a valid address, such as a MAC address corresponding to one STA, the message is determined to be a message sent to the STA corresponding to the MAC address; when the address information is an invalid address, When any STA's MAC address is determined, the message is sent to the WTP. For example, the message address is 38 bits F is a valid address, and 38 bits F is an invalid address. The MAC address of the STA may be pre-stored in the preset list to check whether the address information is a valid address. If the same MAC address is found in the preset list, it is determined to be a valid address, otherwise it is an invalid address.

Or, the identifier information is a preset identifier, and if the preset identifier included in the CAPWAP message is the first value, and each first value corresponds to one STA, the WTP forwards the CAPWAP message to the STA corresponding to the first value; The preset identifier bit included in the CAPWAP message is the second value, and the second value corresponds to the WTP, and the WTP processes the CAPWAP message. For example, if the first value is 1, and the second value is 0, if the preset flag is 1, the CAPWAP message is sent to the WTP; if the preset flag is 0, the CAPWAP message is sent to the STA. Or, the first value is 0, and when the second value is 1, if the preset flag is 0, the CAPWAP message is sent to WTP. If the preset flag is 1, the CAPWAP message is sent to the STA. Further, when the WTP pre-stores the corresponding first value of the multiple STAs, the first value is respectively set to 01, 10, 11 or 1, 2, 3, etc. according to the order of STA access, which can facilitate WTP and multiple When the STA establishes a second CAPWAP tunnel, it can determine which STA the CAPWAP message is sent to.

The WTP determines that the CAPWAP message is sent to the STA according to the identifier information in the CAPWAP message, and then performs step S407. If not, the WTP parses the CAPWAP message and performs a corresponding operation according to the content or policy.

5407. The WTP forwards the CAPWAP message to the STA corresponding to the identifier information in the CAPWAP message.

S408: The STA receives the CAPWAP message forwarded by the WTP.

Further, the STA may also send a CAPWAP message to the AC through the WTP, that is, the CAPWAP message is sent through the second CAPWAP tunnel and the first CAPWAP tunnel, so that the STA can interact with the AC through the CAPWAP message.

S409: The WTP sends a tunnel establishment failure notification to the STA, and the tunnel establishment failure notification includes the failure reason.

S410. The STA receives a tunnel establishment failure notification sent by the WTP, and determines, according to the failure reason, a time for resending the CAPWAP tunnel establishment request.

For example, the STA may pre-store a list with a correspondence between the number and the reason for the failure, the number may be an encoding or a serial number, and the tunnel establishment failure notification may include a coding or serial number, so that The STA can query the list to determine the reason for the tunnel establishment failure.

Further, the list may further pre-store a timer corresponding to the failure reason, so that the STA re-requests to establish a second CAPWAP tunnel after the timer expires. If the failure occurs because the first CAPWAP tunnel is abnormal, the CAPWAP tunnel establishment request is resent after 5 seconds.

Alternatively, FIG. 5 is a flowchart of another embodiment of a tunnel establishment method provided by the present invention. As shown in FIG. 5, the second CAPWAP tunnel may be established by AC control.

S501: The STA sends a CAPWAP tunnel establishment request to the AC through the WTP.

Further, the STA may send a CAPWAP tunnel establishment request to the WTP, and the WTP forwards the CAPWAP tunnel establishment request to the AC. If the CAPWAP tunnel establishment request sent by the STA is received, the AC determines whether to establish a second CAPWAP tunnel between the WTP and the STA according to at least one of the CAPWAP tunnel establishment request content and the maximum access capability of the WTP. S503; No, execute S512.

For example, the AC may determine whether to permit the establishment of the second CAPWAP tunnel according to whether the request condition of the tunnel establishment request is correct, whether the format of the tunnel establishment request is correct, or according to one or more of the maximum access capabilities of the WTP. Determine if a second CAPWAP tunnel is allowed to be established. The method for determining the same has been developed in the above embodiment, and details are not described herein again.

5503. The AC sends a notification message to the WTP to notify the second CAPWAP tunnel establishment.

S504. The WTP receives a notification message that notifies the establishment of the second CAPWAP tunnel.

In this way, the WTP learns that a second CAPWAP tunnel has been established with the STA. The CAPWAP message between the STA and the AC can be prepared for subsequent forwarding.

S505. The WTP establishes a second CAPWAP tunnel with the STA, and sends a notification message to the STA to notify the establishment of the second CAPWAP tunnel.

S506. The STA receives the notification message.

It should be noted that, after receiving the notification, the STA may send a CAPWAP message to the AC through the WTP. The data packet or the control packet in the CAPWAP message may be generated according to the packet format given in the foregoing embodiment, and is no longer Narration.

S507. The AC sends a CAPWAP message to the WTP.

It should be noted that the AC can also receive the CAPWAP message sent by the WTP, or

The CAPWAP message sent by the STA forwarded by the WTP, the AC can also send a CAPWAP message to the WTP or forward the CAPWAP message to the STA through the WTP. This example uses the AC to forward the CAPWAP message to the STA through the WTP as an example, but does not limit it.

Further, the CAPWAP message includes a CAPWAP control packet or a data packet sent by the AC to perform resource scheduling on the STA, and the CAPWAP message further includes the identifier information, where the identifier information is the first CAPWAP tunnel or the second CAPWAP tunnel is established according to the WTP. Or STA generated.

The identifier information may be address information or a preset identifier. The identification information is used to cause the WTP to determine whether the CAPWAP message is a message sent to the STA or a message sent to the WTP. For example, the identifier information is the address information: If the address information is a valid address, the AC sends a CAPWAP message to the WTP, so that the WTP forwards the CAPWAP message to the STA corresponding to the effective address. If the identifier information is an invalid address, the AC sends a CAPWAP message to the WTP. Enable WTP to process CAPWAP messages.

The identifier information is a preset identifier bit: if the preset identifier bit included in the CAPWAP message is the first value, and each first value corresponds to one STA, the AC sends a CAPWAP message to the WTP, so that the WTP corresponds to the first value. The STA forwards the CAPWAP message. If the preset identifier bit included in the CAPWAP message is the second value and the second value corresponds to the WTP, the AC sends a CAPWAP message to the WTP, so that the WTP processes the CAPWAP message.

S508. The WTP receives the CAPWAP message sent by the AC.

5509. The WTP determines, according to the identifier information in the CAPWAP message, whether the CAPWAP message is sent to the STA.

for example. The CAPWAP message may be the control packet and the data packet in the foregoing embodiment. The format and the content of the packet may be as described in the foregoing embodiment, and details are not described herein.

If yes, step S510 is performed. If not, the WTP parses the CAPWAP message and performs a corresponding operation according to its content or policy.

5510. The WTP forwards the CAPWAP message to the STA corresponding to the identifier information included in the CAPWAP message.

5511. The STA receives the CAPWAP message forwarded by the WTP.

5512. The AC sends a tunnel establishment failure notification to the WTP, and the WTP sends a tunnel establishment failure notification to the STA, and the tunnel establishment failure notification includes the failure reason.

S513. The STA receives a tunnel establishment failure notification sent by the WTP, and determines, according to the failure reason, a time for resending the CAPWAP tunnel establishment request.

When the tunnel establishment request message command of the second CAPWAP tunnel is successfully responded, that is, after the second CAPWAP tunnel is established, the RUN state is entered.

When the STA learns that the first CAPWAP tunnel established by the WTP and the AC is in the RUN state, that is, when the state machine of the WTP is in the non-RUN state, the STA enters the UNRUN state. Usually by WTP Sending a tunnel status change message causes the STA to jump from the RUN state to the UNRUN state. In the UNRUN state, the WTP sends the information about the first CAPWAP tunnel to the STA, such as image data and config data. In this state, the STA may also send a (Site Tunnel Request) Station tunnel inquire message to the WTP to obtain the progress of the WTP currently establishing the first CAPWAP tunnel from the WTP feedback message, where the site tunnel request message may carry the WTP current tunnel. The state of the state machine and the timer set by the WTP according to the abnormality cause, the STA can determine, according to the timer in the feedback message, how long the second CAPWAP tunnel can be successfully established, and further determine the time that the local end can access.

After the second CAPWAP tunnel is successfully established, both STA and WTP are in the RUN state. The STA determines that the first CAPWAP tunnel is abnormal, or after the STA determines that the second CAPWAP tunnel is abnormal, the STA switches the state of the tunnel state machine from the RUN state to the non-running UNRUN state.

The second STA and the WTP can maintain the heartbeat packet transmission. If the heartbeat packet sent by the WTP is not received within a preset time period, such as 3S, that is, the WTP heartbeat packet cannot be delivered to the STA, the heartbeat packet fails to be sent. The STA determines the second CAPWAP tunnel exception and transitions from the RUN state to the UNRUN state.

This example uses the WTP to notify the STA of the first CAPWAP tunnel exception. If the first CAPWAP tunnel is abnormal, the STA can be notified by the WTP to make the STA transition from the RUN state to the UNRUN state. The specific method can be as follows:

S303. If the WTP determines that the first CAPWAP tunnel is abnormal, the WTP sends a tunnel change message to the STA.

Further, the WTP receives the reset request message generated by the AC, and sends a tunnel change message to the STA, where the tunnel change message includes the cause of the first CAPWAP tunnel abnormality; or, the WTP learns that the data packet transport layer security protocol DTLS protocol stack is abnormal. The tunnel change message is sent to the STA, and the tunnel change message includes the cause of the first CAPWAP tunnel abnormality.

For example, the tunnel state notification message may be a tunnel change message, and the tunnel change message is sent to the STA when the WTP jumps out of the RUN state. For example, the WTP switches the state of the tunnel state machine from the RUN state to the RESET state or DTLS. In the TD state, the tunnel change message is sent to the STA to indicate that the first CAPWAP tunnel is abnormal. In addition, the tunnel state notification message may delete the message by using the first CAPWAP tunnel. In this case, the STA may jump to the UNRUN state and continue to wait for the first CAPWAP tunnel. A CAPWAP tunnel can also be redirected to the IDLE state, waiting for the first CAPWAP In the embodiment of the present invention, the tunnel state notification message is a tunnel change message as an example, but is not limited thereto.

S304. If the STA receives the tunnel change message sent by the WTP, the STA determines that the first CAPWAP tunnel is abnormal.

S305. The STA is no longer sent through the first CAPWAP tunnel and the second CAPWAP tunnel.

The CAPWAP message interacts with the AC.

It should be noted that the tunnel change message includes the cause of the first CAPWAP tunnel exception. Further, if it is determined that the first CAPWAP tunnel is abnormal, the STA switches the state of the tunnel state machine from the RUN state to the UNRUN state.

For example, both the STA and the WTP may pre-store the coding or sequence number corresponding to the cause of the first CAPWAP tunnel abnormality. When the WTP sends the tunnel change message, the tunnel change message may include the cause of the first CAPWAP tunnel abnormality. The encoding or sequence number, the STA receives the tunnel change message, and can resolve the reason of the corresponding abnormality by parsing the code or serial number, so as to avoid excessive occupation of the wireless network because the message is too large.

S306. The STA sets a preset time period according to the first CAPWAP tunnel abnormality. For example, the STA sets a preset time period according to the reason of the first CAPWAP tunnel abnormality, and pre-stores the time period in the list, and different abnormal causes correspond to different time segments. If the first CAPWAP tunnel needs to restart the DTLS session, set the preset time period to lOmin.

5307. After a preset period of time, the STA sends an inquiry message to the WTP, where the inquiry message is used to query whether the first CAPWAP tunnel is restored.

For example, if the first CAPWAP tunnel needs to restart the DTLS session, the preset time period is set to 10 min. After receiving the tunnel change message, lOmin arrives at the time, and sends an inquiry message to the WTP, and the inquiry message is used to query the first CAPWAP. Whether the tunnel is back to normal.

Further, if the STA determines that the duration of the first CAPWAP tunnel abnormality exceeds the preset time period, the state of the tunnel state machine is switched from the UNRUN state to the idle IDLE state.

5308. The WTP receives an inquiry message sent by the STA, where the inquiry message is used to query whether the first CAPWAP tunnel is restored.

5309. The WTP determines whether the first CAPWAP tunnel is normal. If yes, step S310 is performed. If the fault is abnormal, step S311 is performed.

S310. The WTP returns an inquiry message response to the STA. S311. The WTP does not return an inquiry message response to the STA.

It should be noted that the WTP can be solved in the first CAPWAP tunnel abnormality problem. For example, after the WTP reestablishes the first CAPWAP tunnel, the notification message is sent to notify the STA, so that the STA will jump from the UNRUN state to the RUN state. When the tunnel state machine is in the running state, the STA sends or receives the CAPWAP message forwarded by the WTP. When the tunnel state machine is in the non-operation state, the STA determines that the first CAPWAP tunnel is abnormal or the second CAPWAP tunnel is abnormal, and does not send the CAPWAP message to the AC. Interaction: When the tunnel state machine is in the idle state, the STA determines that the first CAPWAP tunnel or the second CAPWAP tunnel needs to be established, and does not send a CAPWAP message to interact with the AC.

S312. The STA receives the inquiry message response sent by the WTP, and determines that the first CAPWAP tunnel is normal according to the query response message.

After the step S309, the embodiment may further perform step S313 for example, or may not perform the subsequent step S313, and is not limited by the implementation:

5313. If the WTP determines that the first CAPWAP tunnel is normal, the WTP sends a site tunnel ready message to the STA.

5314. The STA receives the site tunnel ready message sent by the WTP, and determines that the first CAPWAP tunnel is normal according to the site tunnel ready message.

Further, after S301 or S302, the method further includes: deleting the second CAPWAP tunnel, and the step is performed after the step S314 in this embodiment, but is not limited thereto.

It should be noted that, before the step S315 is performed, if the WTP receives the version update information sent by the AC, and the WTP has the version update, the STA data request (Image data for STA request) message may be used to send the STA the updated part. Send to the STA, the message can carry the change command or the content of the new protocol. If the WTP receives the configuration (config) update message from the AC, the STA sends the STA-related part to the STA, including radio management (radio adminstrative), so that the STA updates the parameter information according to the message.

5315. If the STA determines to delete the second CAPWAP tunnel, the STA sends a tunnel deletion request to the WTP.

5316. The WTP receives the tunnel deletion request sent by the STA, deletes the second CAPWAP tunnel, and notifies the AC to the second CAPWAP tunnel to delete.

It should be noted that deleting the second CAPWAP tunnel may also be initiated by the AC, such as AC. After the second CAPWAP tunnel is deleted, the tunnel deletion request is sent to the WTP. After receiving the tunnel deletion request sent by the AC, the WTP deletes the second CAPWAP tunnel and notifies the STA of the second CAPWAP tunnel deletion. The tunnel deletion request may include the MAC address information of the STA, so that the WTP determines, according to the MAC address information, which of the established second CAPWAP tunnels needs to be deleted. Finally, the STA receives the notification of the second CAPWAP tunnel deletion sent by the WTP, and determines that the second CAPWAP tunnel has been deleted.

Further, if the second CAPWAP tunnel is deleted, the STA switches the state of the tunnel state machine from the UNRUN state or the RUN state to the IDLE state.

In the tunnel state processing method provided by the embodiment of the present invention, the STA establishes a second CAPWAP tunnel with the WTP, so that the AC interacts with the STA through the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC; The tunnel change message is used to determine that the first CAPWAP tunnel is abnormal. The STA does not use the first CAPWAP tunnel and the second CAPWAP tunnel to send a CAPWAP message to interact with the AC. The first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC. . In this way, by establishing a second CAPWAP tunnel between the WTP and the STA, the STA can learn the tunnel abnormality, and no longer interact with the AC when the tunnel is abnormal, thereby reducing unnecessary information interaction and reducing resource waste. FIG. 6 is a schematic structural diagram of an embodiment of a station STA according to the present invention. As shown in FIG. 6, the STA 10 of this embodiment may include: a STA tunnel establishing unit 101, a STA processing unit 102, and a STA receiving unit 103.

The STA tunnel establishing unit 101 is configured to establish a second CAPWAP tunnel with the point WTP, so that the AC interacts with the STA through the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC.

The STA processing unit 102 is configured to determine, if the STA receiving unit 103 receives the tunnel change message sent by the WTP, the first CAPWAP tunnel abnormality, so that the STA sending unit does not send the CAPWAP message and the AC through the first CAPWAP tunnel and the second CAPWAP tunnel. The first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC.

Further, the STA receiving unit 103 is further configured to receive an inquiry message response sent by the WTP, and determine, according to the query response message, that the first CAPWAP tunnel is restored to normal.

Further, the STA receiving unit 103 is further configured to receive a site tunnel ready for WTP transmission. The STA processing unit 102 is further configured to determine that the first CAPWAP tunnel is normal according to the site tunnel ready message. FIG. 7 is a schematic structural diagram of another embodiment of a station STA according to the present invention. As shown in FIG. 7, the WTP of the present embodiment may further include:

The STA sending unit 104 is configured to send an inquiry message to the WTP after the first preset time period, where the inquiry message is used to query whether the first CAPWAP tunnel is restored.

The time setting unit 105 is configured to set a first preset time period according to the reason that the STA receiving unit 102 receives the first CAPWAP tunnel abnormality included in the tunnel change message. FIG. 8 is a schematic structural diagram of still another embodiment of a station STA according to the present invention. As shown in FIG. 8, the WTP of the present embodiment may further include:

The STA heartbeat packet transmission unit 106 is configured to maintain a heartbeat packet transmission with the WTP. If the heartbeat packet sent by the WTP is not received within a preset time period, the STA processing unit 102 determines that the second CAPWAP tunnel is abnormal. FIG. 9 is a schematic structural diagram of another embodiment of a station STA according to the present invention. As shown in FIG. 9, the WTP of the present embodiment may further include:

The tunnel state machine 107 is configured to switch to the running state if the second CAPWAP tunnel is established with the WTP, and to switch from the running state to the non-running state if the first CAPWAP tunnel or the second CAPWAP tunnel is determined to be abnormal; When it is determined that the duration of the first CAPWAP tunnel abnormality exceeds the first preset time period, the non-operating state state is switched to the idle state.

When the tunnel state machine is in the running state, the STA sends or receives the CAPWAP message forwarded by the WTP. When the tunnel state machine is in the non-operation state, the STA determines that the first CAPWAP tunnel is abnormal or the second CAPWAP tunnel is abnormal, and does not send the CAPWAP message to the AC. Interaction: When the tunnel state machine is in the idle state, the STA determines that the first CAPWAP tunnel or the second CAPWAP tunnel needs to be established, and does not send a CAPWAP message to interact with the AC.

Further, the tunnel state machine 107 is further configured to switch from the non-operation state to the running state after the first CAPWAP tunnel returns to normal. Further, the tunnel state machine 107 is further configured to switch from the non-operation state or the running state to the idle state if the second CAPWAP tunnel is deleted.

The STA, the STA and the WTP provided by the embodiment of the present invention establish a second CAPWAP tunnel, so that the AC interacts with the STA through the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC; if the STA receives the tunnel change message sent by the WTP Then, the first CAPWAP tunnel is determined to be abnormal. The STA does not send a CAPWAP message to the AC through the first CAPWAP tunnel and the second CAPWAP tunnel. The first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC. In this way, by establishing a second CAPWAP tunnel between the WTP and the STA, the STA can learn the tunnel abnormality and no longer interact with the AC when the tunnel is abnormal, thereby reducing unnecessary information interaction and reducing resource waste. FIG. 10 is a schematic structural diagram of a WTP embodiment of a wireless terminal station according to the present invention. As shown in FIG. 10, the WTP 20 of this embodiment may include: a WTP tunnel establishing unit 201, a WTP processing unit 202, and a WTP sending unit 203.

The WTP tunnel establishing unit 201 is configured to establish a second CAPWAP tunnel with the STA, so that the AC interacts with the STA through the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC.

The WTP sending unit 202 is configured to: if the first CAPWAP tunnel is abnormal, the WTP sending unit 203 sends a tunnel change message to the STA, so that the STA does not use the first CAPWAP tunnel and the second CAPWAP tunnel to send a CAPWAP message to interact with the AC. The first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC. FIG. 11 is a schematic structural diagram of another embodiment of the WTP of the present invention. As shown in FIG. 11, the WTP of the present embodiment may further include:

The WTP receiving unit 204 is configured to: when receiving the reset request message generated by the AC, cause the WTP sending unit 203 to send a tunnel change message to the STA, where the tunnel change message includes the first CAPWAP tunnel abnormality; or

The WTP processing unit 202 is further configured to: if the data packet transport layer security protocol DTLS protocol stack is abnormal, the WTP sending unit 203 sends a tunnel change message to the STA, where the tunnel change message includes the first CAPWAP tunnel abnormality. Further, the WTP receiving unit 203 is further configured to receive an inquiry message sent by the STA, where the inquiry message is used to query whether the first CAPWAP tunnel is restored.

Further, the WTP processing unit 202 is further configured to: if it is determined that the first CAPWAP tunnel is normal, the WTP sending unit 203 returns an inquiry message response to the STA; the WTP processing unit 202 is further configured to: if it is determined that the first CAPWAP tunnel is abnormal, The WTP transmitting unit 203 is caused not to return an inquiry message response to the STA.

Further, the WTP processing unit 202 is further configured to: if it is determined that the first CAPWAP tunnel is restored, the WTP sending unit 203 sends a site tunnel ready message to the STA. FIG. 12 is a schematic structural diagram of still another embodiment of the WTP of the present invention. As shown in FIG. 12, the WTP of the present embodiment may further include:

The WTP heartbeat packet transmission unit 205 is configured to maintain heartbeat packet transmission with the STA. If the second CAPWAP tunnel is abnormal, the heartbeat packet transmission fails. FIG. 13 is a schematic structural diagram of another embodiment of the WTP of the present invention. As shown in FIG. 13, the WTP of the present embodiment may further include:

The tunnel state machine 206 is configured to enable the WTP sending unit 202 to send a tunnel change message to the STA if the switch from the running RUN state to the reset RESET state or the data packet transport layer security protocol link disconnects the DTLS TD state. When the tunnel state machine is in the RUN state, the WTP forwards or receives the CAPWAP message sent by the AC or the STA. When the tunnel state machine is in the RESET state and the DTLS TD state, the WTP determines that the first CAPWAP tunnel is abnormal, and is not forwarded by the AC or the STA. CAPWAP message.

The WTP, the STA and the WTP provided by the embodiment of the present invention establish a second CAPWAP tunnel, so that the AC interacts with the STA through the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC; if the STA receives the tunnel change message sent by the WTP The first CAPWAP tunnel is determined to be abnormal. The STA does not send a CAPWAP message to the AC through the first CAPWAP tunnel and the second CAPWAP tunnel. The first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC. In this way, by establishing a second CAPWAP tunnel between the WTP and the STA, the STA can learn the tunnel abnormality and no longer interact with the AC when the tunnel is abnormal, reducing unnecessary information interaction and reducing resource waste. FIG. 14 is a schematic structural diagram of an embodiment of a station STA according to the present invention. As shown in FIG. 14, the STA 30 of this embodiment may include: a STA processor 301, a STA receiver 302, and a transmitter 303.

The STA processor 301 is configured to establish a second CAPWAP tunnel with the WTP, so that the AC interacts with the STA through the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC.

The STA processor 301 is further configured to: if the STA receiver 302 receives the tunnel change message sent by the WTP, determine the first CAPWAP tunnel abnormality; so that the STA transmitter 303 does not send the CAPWAP message through the first CAPWAP tunnel and the second CAPWAP tunnel. The AC interacts. The first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC.

Further, the STA transmitter 303 is configured to send a query message to the WTP after the first preset time period, where the query message is used to query whether the first CAPWAP tunnel is back to normal. FIG. 15 is a schematic structural diagram of another embodiment of a station STA according to the present invention. As shown in FIG. 15, the WTP of this embodiment may further include: a timer 304, based on the apparatus structure shown in FIG. The preset time period is set according to the reason of the first CAPWAP tunnel abnormality included in the tunnel change message received by the STA receiver 302.

Further, the STA receiver 302 is further configured to receive an inquiry message response sent by the WTP, and determine, according to the query response message, that the first CAPWAP tunnel is restored to normal.

Further, the STA receiver 302 is further configured to receive a site tunnel ready message sent by the WTP.

The STA processor 301 is further configured to determine that the first CAPWAP tunnel is restored according to the site tunnel ready message.

Further, the STA processor 301 is further configured to maintain a heartbeat packet transmission with the WTP, and if the heartbeat packet sent by the WTP is not received within the second preset time period, determine that the second CAPWAP tunnel is abnormal.

Further, the STA processor 301 is further configured to establish a second with the WTP.

The status of the CAPWAP tunnel is switched to the running state.

If it is determined that the first CAPWAP tunnel or the second CAPWAP tunnel is abnormal, the operation state is switched to the non-operation state;

If it is determined that the duration of the first CAPWAP tunnel abnormality exceeds the first preset time period, the state is switched from the non-operation state state to the idle state, where, when the operation state is performed, the STA sends or receives the WTP. When the CAPWAP message is forwarded, the STA determines that the first CAPWAP tunnel is abnormal or the second CAPWAP tunnel is abnormal, and does not send a CAPWAP message to interact with the AC; when idle, the STA determines that the first CAPWAP tunnel or the second needs to be established. A CAPWAP tunnel does not send a CAPWAP message to interact with the AC.

Alternatively, the STA processor 301 is further configured to switch from the non-operational state to the running state after the first CAPWAP tunnel is restored to normal.

Or, the STA processor 301 is further configured to switch from the non-running state or the running state to the idle state if the second CAPWAP tunnel is deleted.

The STA, the STA and the WTP provided by the embodiment of the present invention establish a second CAPWAP tunnel, so that the AC interacts with the STA through the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC; if the STA receives the tunnel change message sent by the WTP Then, the first CAPWAP tunnel is determined to be abnormal. The STA does not send a CAPWAP message to the AC through the first CAPWAP tunnel and the second CAPWAP tunnel. The first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC. In this way, by establishing a second CAPWAP tunnel between the WTP and the STA, the STA can learn the tunnel abnormality and no longer interact with the AC when the tunnel is abnormal, thereby reducing unnecessary information interaction and reducing resource waste. FIG. 16 is a schematic structural diagram of a WTP embodiment of a wireless terminal station according to the present invention. As shown in FIG. 17, the WTP 40 of this embodiment may include: a WTP processor 401 and a WTP transmitter 402.

The WTP processor 401 is configured to establish a second CAPWAP tunnel with the STA, so that the AC interacts with the STA by using the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC.

The WTP processor 401 is further configured to: if the first CAPWAP tunnel is abnormal, send the WTP sender 402 to send a tunnel change message to the STA, so that the STA does not pass the first CAPWAP tunnel and the second CAPWAP The tunnel sends a CAPWAP message to interact with the AC, where the first CAPWAP tunnel is the original between the first WTP and the AC.

CAPWAP tunnel. FIG. 17 is a schematic structural diagram of another embodiment of the WTP according to the present invention. As shown in FIG. 17, the WTP of the present embodiment may further include: The WTP receiver 403 is configured to: when receiving the AC reset request message, the WTP transmitter 402 sends a tunnel change message to the STA, where the tunnel change message includes the first CAPWAP tunnel abnormality; or

The WTP processor 401 is further configured to: if the data packet transport layer security protocol DTLS protocol stack is abnormal, the WTP transmitter 402 sends a tunnel change message to the STA, where the tunnel change message includes the first CAPWAP tunnel abnormality.

Further, the WTP receiver 403 is further configured to receive an inquiry message sent by the STA, and the inquiry message is used to query whether the first CAPWAP tunnel is restored.

The WTP processor 401 is further configured to: if the first CAPWAP tunnel is determined to be normal, cause the WTP transmitter 402 to return an inquiry message response to the STA;

The WTP processor 401 is further configured to: if the first CAPWAP tunnel is abnormal, cause the WTP sender 402 not to return an inquiry message response to the STA.

Further, the WTP processor 401 is further configured to: if it is determined that the first CAPWAP tunnel is restored, the WTP transmitter 402 is configured to send a site tunnel ready message to the STA.

Further, the WTP processor 401 is further configured to maintain heartbeat packet transmission with the STA, if the second

If the CAPWAP tunnel is abnormal, the heartbeat packet fails to be sent.

Further, the WTP processor 401 is further configured to: if the state of the tunnel state machine is switched from the running RUN state to the reset RESET state or the data packet transport layer security protocol link cuts off the DTLS TD state, the WTP transmitter is caused to The STA sends a tunnel change message, where the WTP forwards or receives the CAPWAP message sent by the AC or the STA when the tunnel state machine is in a RUN state; the tunnel state machine is the RESET state. And the DTP TD state, the WTP determines that the first CAPWAP tunnel is abnormal, and does not forward the AC or the CAPWAP message sent by the STA. The WTP, the STA and the WTP provided by the embodiment of the present invention establish a second CAPWAP tunnel, so that the AC interacts with the STA through the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC; if the STA receives the tunnel change message sent by the WTP The first CAPWAP tunnel is determined to be abnormal. The STA does not send a CAPWAP message to the AC through the first CAPWAP tunnel and the second CAPWAP tunnel. The first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC. In this way, by establishing a second CAPWAP tunnel between the WTP and the STA, the STA can learn the tunnel abnormality, and no longer interacts with the AC when the tunnel is abnormal. Less unnecessary information interaction and less waste of resources. FIG. 18 is a schematic structural diagram of an embodiment of a tunnel establishment system according to the present invention. The system 1 includes: at least one STA 10 and a WTP 20.

In the system, the STA 10 can adopt the structure shown in any of the STAs 10 of FIG. 6 to FIG. 9, and the WTP 20 can adopt the structure shown by the WTP 20 of any of FIGS. 10 to 13. Alternatively, the system includes:

At least one STA 30 and WTP 40.

The STA 30 can adopt the structure shown in STA 30 of FIG. 14 or FIG. 15, and the WTP 40 can adopt the figure.

16 or the structure shown by WTP 40 of FIG.

The system of the present embodiment can be used to implement the technical solution of the method embodiment shown in FIG. 1 to FIG. 5, and the implementation principle and technical effects are similar, and details are not described herein again.

The system provided by the embodiment of the present invention, after the first CAPWAP tunnel between the WTP and the AC is established, the station STA establishes a second CAPWAP tunnel with the WTP; the STA receives the tunnel status notification message sent by the WTP; if the tunnel status notification message is a tunnel change The STA determines that the first CAPWAP tunnel is abnormal, so that the STA does not interact with the AC through the first CAPWAP tunnel and the second CAPWAP tunnel. In this way, by establishing a second CAPWAP tunnel between the WTP and the STA, the AC can control the STA through the first CAPWAP tunnel and the second CAPWAP tunnel, so that the STA performs operation processing according to different scenarios according to different scenarios. The processing power of the STA improves the network processing capability of the WLAN.

One of ordinary skill in the art will appreciate that all or a portion of the steps to implement the various method embodiments described above can be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and these modifications or replacements, and The essence of the corresponding technical solution is not deviated from the scope of the technical solutions of the embodiments of the present invention.

Claims

claims

1. A tunnel status processing method, characterized by including:

The station STA establishes a second control wireless access point protocol CAPWAP tunnel with the wireless terminal station WTP, so that the access control point AC communicates with the access control point AC through the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC. interact with the STA;

If the STA receives the tunnel change message sent by the WTP, it determines that the first CAPWAP tunnel is abnormal;

The STA no longer sends CAPWAP messages to interact with the AC through the first CAPWAP tunnel and the second CAPWAP tunnel. The first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC. .

2. The method according to claim 1, characterized in that after determining that the first CAPWAP tunnel is abnormal, further comprising:

The STA sends a query message to the WTP after the first preset time period, and the query message is used to query whether the first CAPWAP tunnel returns to normal.

3. The method according to claim 2, wherein the tunnel change message contains the cause of the abnormality of the first CAPWAP tunnel;

After the first preset time period and before sending a query message to the WTP, the STA further includes:

The STA sets the first preset time period based on the cause of the first CAPWAP tunnel exception.

4. The method according to claim 2 or 3, characterized in that, after sending the query message to the WTP, it further includes:

The STA receives the query message response sent by the WTP, and determines that the first CAPWAP tunnel returns to normal according to the query response message.

5. The method according to claim 1, characterized in that after determining that the first CAPWAP tunnel is abnormal, further comprising:

The STA receives the site tunnel ready message sent by the WTP, and determines that the first CAPWAP tunnel returns to normal according to the site tunnel ready message.

6. The method according to any one of claims 1 to 5, characterized in that, after the station STA establishes a second control wireless access point protocol CAPWAP tunnel with the wireless terminal station WTP, include:

The STA maintains heartbeat packet transmission with the WTP. If the heartbeat packet sent by the WTP is not received within the second preset time period, it is determined that the second CAPWAP tunnel is abnormal.

7. The method according to any one of claims 1 to 6, characterized in that, after the station STA establishes a second control wireless access point protocol CAPWAP tunnel with the wireless terminal station WTP, it further includes:

The STA switches the state of the tunnel state machine to the running state;

The STA determines that the first CAPWAP tunnel is abnormal, or, after the STA determines that the second CAPWAP tunnel is abnormal, the method further includes:

The STA switches the state of the tunnel state machine from the running state to the non-running state; if the STA determines that the first CAPWAP tunnel is abnormal for longer than the first preset time period, then the STA The state of the tunnel state machine switches from the non-running state to the idle state; wherein, when the tunnel state machine is in the running state, the STA sends or receives the CAPWAP message forwarded by the WTP; the tunnel state When the machine is in the non-running state, the STA determines that the first CAPWAP tunnel is abnormal or the second CAPWAP tunnel is abnormal, and does not send the CAPWAP message to interact with the AC; the tunnel state machine is the When in the idle state, the STA determines that the first CAPWAP tunnel or the second CAPWAP tunnel needs to be established, and does not send the CAPWAP message to interact with the AC.

8. The method according to claim 7, characterized in that, after the STA determines that the first CAPWAP tunnel has returned to normal, it further includes:

The STA switches the state of the tunnel state machine from the non-running state to the running state.

9. The method according to claim 7 or 8, further comprising:

If the second CAPWAP tunnel is deleted, the STA switches the state of the tunnel state machine from the non-running state or the running state to the idle state.

10. A tunnel status maintenance method, characterized by including:

The wireless terminal site WTP establishes a second control wireless access point protocol CAPWAP tunnel with the site STA, so that the access control point AC communicates with the access control point AC through the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC. interact with the STA;

If the WTP determines that the first CAPWAP tunnel is abnormal, it sends a tunnel message to the STA. Change the message so that the STA no longer sends CAPWAP messages to interact with the AC through the first CAPWAP tunnel and the second CAPWAP tunnel. The first CAPWAP tunnel is the original link between the first WTP and the AC. There are CAPWAP tunnels.

11. The method according to claim 10, wherein if the WTP determines that the first CAPWAP tunnel is abnormal, sending a tunnel change message to the STA includes:

If the WTP receives the reset request message sent by the AC, it sends the tunnel change message to the STA, and the tunnel change message contains the reason for the abnormality of the first CAPWAP tunnel; or,

If the WTP learns that the data packet transport layer security protocol DTLS protocol stack is abnormal, it sends the tunnel change message to the STA, and the tunnel change message contains the reason for the abnormality of the first CAPWAP tunnel.

12. The method according to claim 10 or 11, wherein if the WTP determines that the first CAPWAP tunnel is abnormal, after sending a tunnel change message to the STA, the method further includes:

The WTP receives the inquiry message sent by the STA, and the inquiry message is used to inquire whether the first CAPWAP tunnel is restored to normal.

If the WTP determines that the first CAPWAP tunnel is normal, it returns a query message response to the STA;

If the WTP determines that the first CAPWAP tunnel is abnormal, it does not return a query message response to the STA.

13. The method according to claim 10 or 11, wherein if the WTP determines that the first CAPWAP tunnel is abnormal, after sending a tunnel change message to the STA, the method further includes:

If the WTP determines that the first CAPWAP tunnel has returned to normal, it sends a site tunnel ready message to the STA.

14. The method according to any one of claims 10 to 13, characterized in that, after the wireless terminal station WTP and the station STA establish a second control wireless access point protocol CAPWAP tunnel, it also includes:

The WTP and the STA maintain heartbeat packet transmission. If the second CAPWAP tunnel is abnormal, the heartbeat packet transmission fails.

15. The method according to any one of claims 10 to 14, characterized in that, after the wireless terminal station WTP and the station STA establish a second control wireless access point protocol CAPWAP tunnel, it further includes:

If the status of the tunnel state machine of the WTP is switched from the running RUN state to the RESET state or the data packet transport layer security protocol link is cut off from the DTLS TD state, a tunnel change message is sent to the STA, where, the tunnel status When the machine is in the RUN state, the WTP forwards or receives the CAPWAP message sent by the AC or the STA; when the tunnel state machine is in the RESET state and the DTLS TD state, the WTP determines the The first CAPWAP tunnel is abnormal and the CAPWAP message sent by the AC or the STA is no longer forwarded.

16. A site STA, which is characterized by including:

The STA tunnel establishment unit is configured to establish a second control wireless access point protocol CAPWAP tunnel with the wireless terminal station WTP, so that the access control point AC passes the first CAPWAP tunnel between the WTP and the AC and the third Two CAPWAP tunnels interact with the STA;

The STA processing unit is configured to determine that the first CAPWAP tunnel is abnormal if the STA receiving unit receives the tunnel change message sent by the WTP; so that the STA sending unit no longer sends CAPWAP through the first CAPWAP tunnel and the second CAPWAP tunnel. Messages are interacted with the AC, and the first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC.

17. The STA according to claim 16, characterized in that,

The STA sending unit is configured to send a query message to the WTP after a first preset time period. The query message is used to query whether the first CAPWAP tunnel returns to normal.

18. The STA according to claim 17, further comprising:

A time setting unit, configured to set the first preset time period according to the reason why the first CAPWAP tunnel is abnormal contained in the tunnel change message received by the STA receiving unit.

19. The STA according to claim 17 or 18, characterized in that,

The STA receiving unit is also configured to receive a query message response sent by the WTP, and determine that the first CAPWAP tunnel returns to normal according to the query response message.

20. The STA according to claim 16, characterized in that,

The STA receiving unit is also configured to receive the site tunnel ready message sent by the WTP; the STA processing unit is also configured to determine the first site tunnel ready message according to the site tunnel ready message. The CAPWAP tunnel returns to normal.

21. The STA according to any one of claims 16 to 20, further comprising: an STA heartbeat packet transmission unit, used for maintaining heartbeat packet transmission with the WTP, if within the second preset time period If the heartbeat packet sent by the WTP is not received, the STA processing unit determines that the second CAPWAP tunnel is abnormal.

22. The STA according to any one of claims 16 to 21, further comprising: a tunnel state machine, configured to switch to a running state if it is in a state of establishing a second CAPWAP tunnel with the WTP;

If it is determined that the first CAPWAP tunnel or the second CAPWAP tunnel is abnormal, then switch from the running state to the non-running state;

If it is determined that the abnormal duration of the first CAPWAP tunnel exceeds the first preset time period, switch from the non-running state to an idle state;

Wherein, when the tunnel state machine is in the running state, the STA sends or receives the CAPWAP message forwarded by the WTP; when the tunnel state machine is in the non-running state, the STA determines the first If a CAPWAP tunnel is abnormal or the second CAPWAP tunnel is abnormal, the CAPWAP message is not sent to interact with the AC; when the tunnel state machine is in the idle state, the STA determines that the first CAPWAP tunnel needs to be established Or the second CAPWAP tunnel does not send the CAPWAP message to interact with the AC.

23. The STA according to claim 22, characterized in that,

The tunnel state machine is also used to switch from the non-operational state to the operating state after determining that the first CAPWAP tunnel returns to normal.

24. The STA according to claim 22 or 23, characterized in that,

The tunnel state machine is also used to switch from the non-running state or the running state to an idle state if the second CAPWAP tunnel is deleted.

25. A wireless terminal site WTP, characterized by including:

WTP tunnel establishment unit, used to establish a second control wireless access point protocol CAPWAP tunnel with the site STA, so that the access control point AC passes the first CAPWAP tunnel and the second CAPWAP between the WTP and the AC The tunnel interacts with the STA;

The WTP processing unit is configured to, if it is determined that the first CAPWAP tunnel is abnormal, cause the WTP sending unit to send a tunnel change message to the STA, so that the STA no longer passes the first CAPWAP tunnel. The CAPWAP tunnel and the second CAPWAP tunnel send CAPWAP messages to interact with the AC. The first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC.

26. The WTP according to claim 25, further comprising:

The WTP receiving unit is configured to, if receiving the reset request message generated by the AC, cause the

The WTP sending unit sends a tunnel change message to the STA, and the tunnel change message contains the reason why the first CAPWAP tunnel is abnormal; or,

The WTP processing unit is also configured to cause the WTP sending unit to send the tunnel change message to the STA if it is informed that the data packet transport layer security protocol DTLS protocol stack is abnormal, and the tunnel change message contains the The reason for the abnormality of the first CAPWAP tunnel.

27. The WTP according to claim 25 or 26, characterized in that,

The WTP receiving unit is also used to receive an inquiry message sent by the STA. The inquiry message is used to inquire whether the first CAPWAP tunnel has returned to normal;

The WTP processing unit is also configured to cause the WTP sending unit to return a query message response to the STA if it is determined that the first CAPWAP tunnel is normal;

The WTP processing unit is also configured to cause the WTP sending unit not to return a query message response to the STA if it is determined that the first CAPWAP tunnel is abnormal.

28. The WTP according to claim 25 or 26, characterized in that,

The WTP processing unit is also configured to cause the WTP sending unit to send a site tunnel ready message to the STA if it is determined that the first CAPWAP tunnel returns to normal.

29. The WTP according to any one of claims 25 to 28, further comprising: a WTP heartbeat packet transmission unit for maintaining heartbeat packet transmission with the STA. If the second

If the CAPWAP tunnel is abnormal, the heartbeat packet fails to be sent.

30. The WTP according to any one of claims 25 to 29, further comprising: a tunnel state machine, used to switch from the running RUN state to the reset RESET state or the data message transport layer security protocol link Cutting off the DTLS TD state causes the WTP sending unit to send a tunnel change message to the STA. When the tunnel state machine is in the RUN state, the WTP forwards or receives the AC or the STA. CAPWAP message; When the tunnel state machine is in the RESET state and the DTLS TD state, the WTP determines that the first CAPWAP tunnel is abnormal and no longer forwards the CAPWAP message sent by the AC or the STA.

31. A site STA, which is characterized by including:

The STA processor is configured to establish a second control wireless access point protocol CAPWAP tunnel with the wireless terminal station WTP, so that the access control point AC passes the first CAPWAP tunnel between the WTP and the AC and the second The CAPWAP tunnel interacts with the STA;

The STA processor is also configured to determine that the first CAPWAP tunnel is abnormal if the STA receiver receives the tunnel change message sent by the WTP; so that the STA sender no longer passes the first CAPWAP tunnel and the second CAPWAP The tunnel sends CAPWAP messages to interact with the AC, and the first CAPWAP tunnel is the original CAPWAP tunnel between the first WTP and the AC.

32. The STA according to claim 31, characterized in that,

The STA transmitter is configured to send an inquiry message to the WTP after a first preset time period, and the inquiry message is used to inquire whether the first CAPWAP tunnel returns to normal.

33. The STA according to claim 32, further comprising:

A timer, configured to set the first preset time period according to the reason why the first CAPWAP tunnel is abnormal when the STA receiver receives the tunnel change message.

34. The STA according to claim 32 or 33, characterized in that,

The STA receiver is also configured to receive a query message response sent by the WTP, and determine according to the query response message that the first CAPWAP tunnel returns to normal.

35. The STA according to claim 31, characterized in that,

The STA receiver is also configured to receive the site tunnel ready message sent by the WTP; the STA processor is also configured to determine the first site tunnel ready message according to the site tunnel ready message.

The CAPWAP tunnel returns to normal.

36. The STA according to any one of claims 31 to 35, characterized in that the STA processor is also used to maintain heartbeat packet transmission with the WTP. If it is not received within the second preset time period, Upon receiving the heartbeat packet sent by the WTP, it is determined that the second CAPWAP tunnel is abnormal.

37. The STA according to any one of claims 31 to 36, wherein the STA processor is further configured to switch to a running state if it is in a state of establishing a second CAPWAP tunnel with the WTP; If it is determined that the first CAPWAP tunnel or the second CAPWAP tunnel is abnormal, switch from the running state to the non-running state;

If it is determined that the abnormal duration of the first CAPWAP tunnel exceeds the first preset time period, the state is switched from the non-running state to the idle state, wherein in the running state, the STA sends or receives all The CAPWAP message forwarded by the WTP; When in the non-running state, the STA determines that the first CAPWAP tunnel is abnormal or the second CAPWAP tunnel is abnormal, and does not send the CAPWAP message to interact with the AC; When in the idle state, the STA determines that the first CAPWAP tunnel or the second CAPWAP tunnel needs to be established, and does not send the CAPWAP message to interact with the AC.

38. The STA according to claim 37, characterized in that,

The STA processor is also configured to switch from the non-running state to the running state after determining that the first CAPWAP tunnel returns to normal.

39. The STA according to claim 37 or 38, characterized in that,

The STA processor is also configured to switch from the non-running state or the running state to an idle state if the second CAPWAP tunnel is deleted.

40. A wireless terminal site WTP, characterized by including:

WTP processor, configured to establish a second control wireless access point protocol CAPWAP tunnel with the site STA, so that the access control point AC passes the first CAPWAP tunnel and the second CAPWAP tunnel between the WTP and the AC Interact with the STA;

The WTP processor is also configured to: if it is determined that the first CAPWAP tunnel is abnormal,

The WTP sender sends a tunnel change message to the STA, so that the STA no longer sends CAPWAP messages to interact with the AC through the first CAPWAP tunnel and the second CAPWAP tunnel, and the first CAPWAP tunnel is the third CAPWAP tunnel. An existing CAPWAP tunnel between the WTP and the AC.

41. The WTP according to claim 40, further comprising:

The WTP receiver is configured to, upon receiving the reset request message generated by the AC, cause the WTP sender to send a tunnel change message to the STA, where the tunnel change message contains the reason for the abnormality of the first CAPWAP tunnel. ; or,

The WTP processor is also configured to cause the WTP sender to send the tunnel change message to the STA if it is informed that the data packet transport layer security protocol DTLS protocol stack is abnormal. The channel change message contains the reason why the first CAPWAP tunnel is abnormal.

42. The WTP according to claim 40 or 41, characterized in that,

The WTP receiver is also used to receive an inquiry message sent by the STA. The inquiry message is used to inquire whether the first CAPWAP tunnel has returned to normal;

The WTP processor is also configured to cause the WTP sender to return a query message response to the STA if it is determined that the first CAPWAP tunnel is normal;

The WTP processor is also configured to cause the WTP sender not to return a query message response to the STA if it is determined that the first CAPWAP tunnel is abnormal.

43. The WTP according to claim 40 or 41, characterized in that,

The WTP processor is also configured to cause the WTP sender to send a site tunnel ready message to the STA if it is determined that the first CAPWAP tunnel returns to normal.

44. The WTP according to any one of claims 40 to 43, characterized in that,

The WTP processor is also used to maintain heartbeat packet transmission with the STA. If the second CAPWAP tunnel is abnormal, the heartbeat packet transmission fails.

45. The WTP according to any one of claims 40 to 44, characterized in that,

The WTP processor is also used to cause the WTP sender to send a message to the STA if the status of the tunnel state machine is switched from the RUN state to the RESET state or the data packet transport layer security protocol link is cut off from the DTLS TD state. Send a tunnel change message, wherein when the tunnel state machine is in the RUN state, the WTP forwards or receives the CAPWAP message sent by the AC or the STA; the tunnel state machine is in the RESET state and the When the DTLS TD state is reached, the WTP determines that the first CAPWAP tunnel is abnormal and no longer forwards the CAPWAP message sent by the AC or the STA.

46. A system characterized by including:

The site STA described in any one of claims 16 to 24;

The wireless terminal station WTP according to any one of claims 25 to 30.

47. A system characterized by including:

The site STA described in any one of claims 31 to 39;

The wireless terminal station WTP according to any one of claims 40 to 45.