CN101772109A - Method for supporting WLAN roaming switching between different subnets, device and system - Google Patents
Method for supporting WLAN roaming switching between different subnets, device and system Download PDFInfo
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- CN101772109A CN101772109A CN200810208184A CN200810208184A CN101772109A CN 101772109 A CN101772109 A CN 101772109A CN 200810208184 A CN200810208184 A CN 200810208184A CN 200810208184 A CN200810208184 A CN 200810208184A CN 101772109 A CN101772109 A CN 101772109A
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Abstract
The invention provides a method for supporting WLAN roaming switching between different subnets, a device and a system; a communication network system comprises: a mobile site, an access control device which corresponds to a plurality of subnets and a wireless access point which is connected with the access control device, wherein, the mobile site sends a switching request to the local subnet through the roaming switching, the access control device can obtain addressable information of the access control device which corresponds to a target wireless access point in a non-local subnet according to the switching request; then, routing forwarding of the switching request is conducted between the local subnet and the access control device of the non-local subnet; meanwhile, the invention also provides a server which registers, manages, and inquires the access control device that corresponds to the plurality of subnets and the information of the wireless access point which is connected with the access control device.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of wireless lan (wlan) roaming handoff technique.
Background technology
WLAN is one of wireless broad band technology, obtained development fast in recent years, along with popularizing of WLAN, WiFi equipment becomes extremely important in the roaming switching of minizone, the low price of WLAN and higher transmission rate make it obtain developing fast and using simultaneously.
Standard formulation tissue as WLAN, institute of electrical and electronic engineers IEEE 802.11 standards do not consider that initial many WAP (wireless access point) (look actual conditions when determining, industry waits with AP or WTP usually to be represented) the roaming switching problem, a STA (mobile site) roams into another target WTP from a WTP needs 100ms correlation time again, after this also need several seconds and set up the authentication connection, it is fatal that the time of line again in these several seconds is used for real time business such as Wireless VOIP (voice-over-net) conversations.
Afterwards, in order to support the mobility of STA, IEEE has at first proposed IEEE 802.11f standard--IAPP (access point interoperability agreement), this standard code the system that forms by STA, a plurality of AP/WTP, DS (distribution service), AC (access controller) and RADIUS (remote customer dialing authentication system) server realize that STA at the roaming handoff functionality between many WAP (wireless access point) on the same network segment, communicates and exchange the agreement of handover relevant information between the AP/WTP.Because AP/WTP needed to carry out message with radius server when each STA switched, therefore the time delay that switches is long.
Given this, the required time of authentication was used to support real time business when 802.11r standard newly developed--" Fast BSS Transition " (basic service is provided with conversion fast) was conceived to reduce the roaming switching, and it has improved the handoff procedure when mobile site moves between WTP.1), the Over-Air mode IEEE802.11r has defined dual mode and has realized authentication request and the resource reservation request of STA to target AP/WTP:: directly initiate authentication request and resource reservation request by STA to target AP/WTP, this needs the AP/WTP disconnection to be connected with the wireless channel of current AP/WTP, and direct and target AP/WTP asks alternately; 2), Over-DS mode: STA is transmitted by current AP/WTP with resource reservation request (and response is mutual) the authentication request of target AP/WTP: promptly STA keeps being connected with the wireless channel of current AP/WTP, and initiates authentication request and resource reservation request by current AP/WTP to target AP/WTP; Same, target AP/WTP makes response to aforementioned STA request, and target AP/WTP at first will ask response message to issue current AP/WTP, be transmitted to STA by it again.Come therefrom, agreement allows a mobile site before realizing that roaming is switched, just set up with target AP/WTP between safety and possess the state of QoS, this connections can be lost and dropped calls be reduced to minimum.
But the WLAN roaming under the aforementioned Over-DS mode switches roaming switching between two WAP (wireless access point) that are based in the same subnet, and but there are the following problems for the WLAN roaming switching between two WAP (wireless access point) between different sub-network:
Is that example describes foregoing problems in conjunction with legend 1 in the Over-DS mode, mobile site STA2 switches to another target WTP3 from a WTP2 roaming, access control equipment AC1 and AC2 that described WTP2, WTP3 are respectively in the different sub-network control, STA2 sends handoff request by its local subnet to target WTP3 before roaming is switched, and access control equipment AC1 is sightless to the L2 address of target WTP3, and it can't be transmitted to handoff request target WTP3.
In addition, how access control equipment in the different sub-network and WAP (wireless access point) thereof are effectively managed, guaranteed that the switching of mobile site between different sub-network also is a problem that faces.
Summary of the invention
The present invention aims to provide a kind of technical scheme of supporting that the WLAN roaming of mobile site between different sub-network switches, it can give other targeted subnets with the handoff request routing forwarding of roaming the mobile site of switching between different sub-network by setting up the access control equipment of other subnets and the addressable information inquiry of WAP (wireless access point) thereof in the access control equipment of different sub-network.
According to an aspect of the present invention, provide here and support the method that WLAN roaming switches between different sub-network in a kind of access control equipment, comprising: step a 1), receive handoff request from the mobile site in its local subnet; Step b) is according to the addressable information of the pairing access control equipment of Target Wireless access point in foreign subnet of described handoff request acquisition; Step c) is with the access control equipment of described handoff request routing forwarding to foreign subnet.
According to another aspect of the present invention, here provide and support the control device that WLAN roaming switches between different sub-network in a kind of access control equipment, it comprises: first control device receives from the handoff request of mobile site in its local subnet and determines whether local subnet addressable of its Target Wireless access point; Inquiry unit is according to the addressable information of the pairing access control equipment of Target Wireless access point in foreign subnet of first control device instruction inquiry acquisition; Second control device, according to the addressable information that obtains with the access control equipment of described handoff request routing forwarding to foreign subnet.
According to another aspect of the present invention, a kind of server that WLAN roaming switches between the configuration management different sub-network that is used for is provided here, it comprises: storage device is used for storing the addressable information of some subnet access control equipments and the mapping relations of wireless access dot information thereof; Inquiry unit receives the query requests from access control equipment in first subnet, returns the addressable information of access control equipment in pairing second subnet of Target Wireless access point.
According to another aspect of the present invention, a kind of communications network system of supporting that WLAN roaming switches between different sub-network is provided here, described communications network system comprises: access control equipment in mobile site, the corresponding some subnets and the WAP (wireless access point) that is connected thereof, wherein: mobile site sends handoff request by local subnet before switching; Access control equipment according to the addressable information of the pairing access control equipment of Target Wireless access point in foreign subnet of described handoff request acquisition, carries out routing forwarding to handoff request in local subnet and between the access control equipment of foreign subnet.
Technical solution of the present invention has following advantage:
On the compatible basis that keeps the prior art standard, existing 802.11r technical standard range of application has been carried out expansion effectively; The implementation simple and flexible by methods such as simple I P encapsulation route or VLAN transmission, makes that the switching message intercommunication between the different sub-network can reach, and is easy to realize on the basis of existing network and prior art.
Description of drawings
By the detailed description with the accompanying drawing that proposes below, it is more obvious that feature of the present invention, character and advantage will become, and components identical has identical sign in the accompanying drawing, wherein:
Fig. 1 is the access network system structure legend that a kind of typical support WLAN switches;
Fig. 2 is the access network system structure embodiment that WLAN roaming switches between support different sub-network provided by the present invention;
Fig. 3 supports the method flow example that WLAN roaming switches between different sub-network in the access control equipment provided by the present invention;
Fig. 4 is the access control equipment structure embodiment that WLAN roaming switches between support different sub-network provided by the present invention;
Fig. 5 is the remote server structure embodiment that WLAN roaming switches between support different sub-network provided by the present invention.
Embodiment
Below in conjunction with accompanying drawing, preferred implementation of the present invention is described in detail.
Fig. 2 is the access network system structure embodiment that WLAN roaming switches between support different sub-network provided by the present invention, and this access network system comprises at least: mobile site STA 20; Access control equipment 11 and the WAP (wireless access point) WTP21a that is connected, WTP 21b in corresponding first subnet, access control equipment 12 and the WTP 22a that is connected, WTP 22b in second subnet, wherein:
Access network system may further include a remote server 13 in the legend, it carries out maintenance management to the access control equipment in first subnet, second subnet 11,12 and the WAP (wireless access point) WTP 21a that is controlled, WTP 21b, information such as WTP 22a, WTP 22b, in realization, it can receive the mapping relations of setting up wireless access dot information in access control equipment addressable information and the subnet thereof from the register requirement of access control equipment in the access network system 11,12.Introduce as the front, remote server 13 further receives the real-time query requests from an access control equipment 11 in the access network system, returns one by the IP address of access control equipment 12 or the VLAN that is connected in the pairing subnet of inquiry WAP (wireless access point) WTP 22a.
Fig. 3 supports the method flow that WLAN roaming switches between different sub-network in the access control equipment provided by the present invention, for example describes, it comprises the steps: in conjunction with the access control equipment among Fig. 2 11
Step S31, the handoff request that access control equipment 11 receives from the mobile site in its local subnet 20, its Target Wireless access point is WTP 22a;
Typical handoff request comprises types such as quick switching authentication frame, quick switch frame as based on the handover request frame 802.11r standard definition, that be used for quick switching.With quick switching authentication frame class is example, and such time comprises quick switching authentication request frames, 802.11 authenticate-acknowledge frames by the frame that mobile site 20 mails to target WTP 22a; With quick switch frame class is example, and such time comprises FT Request (handover request frame fast), FT Confirm (switching acknowledgement frame fast) by the frame that mobile site 20 mails to target WTP 22a, in detail can be with reference to the 802.11r related specifications.
Step S32, obtain the addressable information of the pairing access control equipment of Target Wireless access point in the foreign subnet according to described handoff request;
Be without loss of generality, shown in step S321, access control equipment 11 is according to the MAC Address of the Target Wireless access point in the handover request frame that is received, can judge at first whether it belongs to the addressable Target Wireless access point of local subnet, if "Yes" then directly is transmitted to the Target Wireless access point in the local subnet.
Here, according to the embodiment of the invention, shown in step S 322, the non-local subnet addressable of Target Wireless access point WTP 22a, it need obtain the addressable information of the access control equipment 12 in the pairing foreign subnet of this Target Wireless access point WTP 22a.Thereby managing configuration in advance, modes such as registration of this locality such as the addressable information of the access control equipment in the foreign subnet 12 and wireless access dot information thereof can self be added by access control equipment 11, modification or remote login make it support the addressable information of the access control equipment 12 of local search acquisition fast; Or access control equipment 11 can be inquired about acquisition in real time to a remote server.
For example the telemanagement configuration down, access network system has in the management maintenance range of definition (for example in Network Access Provider NAP scope, or in the mobile domains of a definition) remote server 13 of all access control equipments and the WAP (wireless access point) that connected thereof, access control equipment 11 termly or irregularly sends request or accepts control command from remote server 13 to remote server 13, sends to the mapping relations of wireless access dot information in the access control equipment addressable information of remote server 13 all foreign subnets and the subnet thereof own to support its local search fast.
For example the telemanagement configuration down, access control equipment 11 can receive the register requirement from the access control equipment 12 of a foreign subnet trusty in the same range of definition, this register requirement comprises WAP (wireless access point) WTP 22a, WTP 22b information in its place subnet, thereby access control equipment 11 can be based upon the mapping relations of wireless access dot information in interior any access control equipment addressable information of a range of definition and the subnet thereof, to support its local search fast.
Perhaps under the remote live inquiry mode, one of access control equipment 11 structure comprises by query aim WAP (wireless access point) WTP 22a MAC Address all access control equipments in interior data message sends to a remote server or range of definition, obtains the response of Target Wireless access point WTP 22a addressable information of access control equipment in foreign subnet.
Step S33, with the access control equipment of described handoff request routing forwarding to foreign subnet.
If the addressable information of access control equipment is the IP address in the foreign subnet that inquiry is obtained, access control equipment carries out IP encapsulation process and routing forwarding to the handoff request from the current wireless access point.
If the addressable information of access control equipment is can be dedicated vlan in the foreign subnet that inquiry is obtained, the equity access control equipment can pass through switch configuration dedicated vlan UNICOM, and access control equipment only needs the handoff request from the current wireless access point is forwarded to the VLAN of appointment.
Fig. 4 is the access control equipment structure embodiment that WLAN roaming switches between support different sub-network provided by the present invention, and it comprises: first control device 41, and inquiry unit 42, second control device 43, wherein:
The handoff request that first control device 41 receives from the mobile site in its local subnet, described handoff request comprises quick switching authentication frame or quick switch frame etc., for example: by the quick switching authentication request frames, 802.11 authenticate-acknowledge frames, FT Request (handover request frame fast), the FT Confirm (switching acknowledgement frame fast) etc. that send of the Target Wireless access point in the subnet outwards of current wireless access point in the local subnet; Predictably, by the local subnet internal object WAP (wireless access point) quick switching authentication request response frame, 802.11 authentication ACK frames, FT Response (handoff response frame fast), the FT ACK (handoff response frame fast) etc. that send of the source WAP (wireless access point) in the subnet outwards.
Thereby registration of this locality such as the addressable information of the access control equipment in the foreign subnet and wireless access dot information thereof can self be added by access control equipment 11 in advance, modification or remote login mode administration configuration are supported the addressable information of the access control equipment of local search acquisition fast; Maybe can be by inquiring about acquisition in real time to a remote server.
For example the telemanagement configuration down, in conjunction with Fig. 2 example, access control equipment 11 is configured to point to a remote server 13 (in the access network system in management maintenance range of definition the server of all access control equipments and the WAP (wireless access point) that connected thereof), inquiry unit 42 termly or irregularly sends request or accepts control command from remote server 13 to remote server 13, with WAP (wireless access point) WTP 22a in the access control equipment 12 addressable information of all foreign subnets of remote server and the subnet thereof, the mapping relations of WTP 22b information send to oneself, set up the mapping table 421 an of this locality, to support its local search fast.
For example the telemanagement configuration down, in conjunction with Fig. 2 example, inquiry unit 42 can receive the register requirement from the access control equipment 12 of a foreign subnet trusty in the range of definition, this register requirement comprises WAP (wireless access point) WTP 22a, WTP 22b information in its place subnet, thereby access control equipment 11 can be based upon the mapping relations of wireless access dot information in interior any access control equipment addressable information of a range of definition and the subnet thereof, set up the mapping table 421 an of this locality, to support its local search fast.
Perhaps under the remote live inquiry mode, in conjunction with Fig. 2 example, inquiry unit 42 in the access control equipment 11 can be constructed one and be comprised by query aim WAP (wireless access point) WTP 22a MAC Address all access control equipments in interior data message sends to remote server 13 or range of definition, thereby obtains the response of Target Wireless access point WTP 22a addressable information of access control equipment 12 in foreign subnet.
If searching the addressable information that device obtains is the IP address of access control equipment in the foreign subnet, 43 pairs of handoff request from the current wireless access point of second control device are carried out the IP encapsulation process;
If searching the addressable information that device obtains is the VLAN of access control equipment correspondence in the foreign subnet, second control device is forwarded to the VLAN of appointment to the handoff request from the current wireless access point.
Here, in conjunction with Fig. 2 example, first control device 41 in the access control equipment 12 can be realized the WAP (wireless access point) WTP 22a in its subnet, WTP 22b are configured and monitor based on CAPWAP (control of WAP (wireless access point) and configuration), LWAPP agreements such as (Lightweight Access Point Protocol), comprises obtaining its mac address information etc.Therefore, first control device 41 can be registered the MAC Address of WAP (wireless access point) WTP 22a, WTP 22b in the addressable information (IP address or the VLAN that is connected) of access control equipment self and the subnet scoping thereof by the access control equipment 11 that inquiry unit 42 reports a foreign subnet trusty in remote server 13 or the range of definition together.
Fig. 5 is the remote server structure embodiment that WLAN roaming switches between support different sub-network provided by the present invention, and it comprises a storage device 51, inquiry unit 52, wherein:
The real-time query requests that inquiry unit 52 receives from an access control equipment is returned one by the addressable information of access control equipment in the pairing foreign subnet of inquiry WAP (wireless access point).
Preferably, upgraded in time for ease of access control equipment in the all-ones subnet in the range of definition and wireless access dot information thereof, remote server can also comprise a register device 53, it receives the register requirement from access control equipment, described register requirement comprises all wireless access dot informations in its subnet scoping, or the wireless access dot information that will upgrade.
Although above-mentioned being illustrated as the invention provides some embodiment; be not to be used for limiting protection scope of the present invention; the professional in present technique field can carry out various modifications to embodiment under the prerequisite that does not depart from the scope of the present invention with spirit, this modification all belongs in the scope of the present invention.
Claims (24)
1. support the method that WLAN roaming switches between different sub-network in the access control equipment (AC), it is characterized in that comprising:
Step a1), reception is from the handoff request of the mobile site in its local subnet;
Step b), obtain the addressable information of the pairing access control equipment of Target Wireless access point in the foreign subnet according to described handoff request;
Step c), with the access control equipment of described handoff request routing forwarding to foreign subnet.
2. the method for claim 1 is characterized in that the described handoff request of step a) is quick switching authentication frame or quick switch frame based on 802.11r.
3. the method for claim 1 is characterized in that the described addressable information of step b) can be the IP address, and the step c) access control equipment carries out the IP encapsulation process way of escape by forwarding to described handoff request.
4. the method for claim 1 is characterized in that step b) addressable information can be Virtual Local Area Network information, and the step c) access control equipment is forwarded to described handoff request the VLAN of appointment.
5. as the described method of claim 1 to 4, it is characterized in that further comprising step a0), the reception control command is carried out this locality configuration to the addressable information and the wireless access dot information thereof of access control equipment in the foreign subnet, step b) is based on described local configuration, and inquiry obtains the addressable information of access control equipment in the foreign subnet.
6. as the described method of claim 1 to 4, it is characterized in that in the step b) that the data message that one of access control equipment structure comprises the Target Wireless access-in point information carries out the strange land inquiry, obtains the addressable information of access control equipment in its foreign subnet.
7. support the control device that WLAN roaming switches between different sub-network in an access control equipment, it is characterized in that comprising:
First control device: receive from the handoff request of mobile site in its local subnet and determine whether local subnet addressable of its Target Wireless access point;
Inquiry unit: the addressable information that obtains the pairing access control equipment of Target Wireless access point in the foreign subnet according to first control device instruction inquiry;
Second control device: according to the addressable information that obtains with the access control equipment of described handoff request routing forwarding to foreign subnet.
8. control device as claimed in claim 7 is characterized in that described handoff request is quick switching authentication frame or quick switch frame based on 802.11r.
9. control device as claimed in claim 7 is characterized in that described to search the addressable information that device obtains be the IP address, and second control device carries out the IP encapsulation process way of escape by forwarding to described handoff request.
10. control device as claimed in claim 7 is characterized in that described to search the addressable information that device obtains be that information can be Virtual Local Area Network information, and second control device is forwarded to described handoff request the VLAN of appointment.
11. control device as claimed in claim 7 is characterized in that described first control device registers the access control equipment of wireless access dot information in its local subnet in a remote server or foreign subnet.
12. as the described control device of claim 7 to 11, it is characterized in that described inquiry unit further receives the control command from the access control equipment in remote server or the foreign subnet, the addressable information of access control equipment in the foreign subnet and wireless access dot information thereof are carried out this locality dispose.
13. as the described control device of claim 7 to 11, it is characterized in that describedly searching the data message that one of device construction comprises the Target Wireless access-in point information and carrying out the strange land inquiry, obtain the addressable information of access control equipment in the foreign subnet.
14. one kind is used for the server that WLAN roaming switches between different sub-network, it is characterized in that comprising:
Storage device: be used for storing the addressable information of some subnet access control equipments and the mapping relations of wireless access dot information thereof;
Inquiry unit: receive query requests, return one by the addressable information of access control equipment in the pairing subnet of inquiry WAP (wireless access point) from access control equipment.
15. server as claimed in claim 14 is characterized in that described server further comprises:
Register device: receive the register requirement from access control equipment, described register requirement comprises wireless access dot information in its subnet scoping.
16. server as claimed in claim 14 is characterized in that the IP address that described addressable information is access control equipment or the Virtual Local Area Network information at its place.
17. server as claimed in claim 14 is characterized in that the MAC Address of described wireless access dot information for this WAP (wireless access point).
18., it is characterized in that described inquiry unit can be: receive query requests, return wireless access dot information in other subnet access control equipment addressable information and the subnet thereof from access control equipment as the described server of claim 14 to 17.
19. a communications network system of supporting that WLAN roaming switches between different sub-network, described communications network system comprises: access control equipment in mobile site, the corresponding some subnets and the WAP (wireless access point) that is connected thereof is characterized in that:
Mobile site: send handoff request by local subnet before switching;
Access control equipment:, handoff request is carried out routing forwarding in local subnet and between the access control equipment of foreign subnet according to the addressable information of the pairing access control equipment of Target Wireless access point in foreign subnet of described handoff request acquisition.
20. communications network system as claimed in claim 19 is characterized in that the handoff request of mobile site is quick switching authentication frame or quick switch frame based on 802.11r.
21. communications network system as claimed in claim 19, the addressable information that it is characterized in that described access control equipment can be the VLAN at IP address or place, and the wireless access dot information is its MAC Address in its corresponding subnet.
22. as the described communications network system of claim 19 to 21, it is characterized in that further comprising remote server, be used for addressable information, the wireless access dot information of the access control equipment in described some subnets are carried out maintenance management.
23. communications network system as claimed in claim 22 is characterized in that described remote server receives from the register requirement of described access control equipment to wireless access dot information in its subnet.
24. communications network system as claimed in claim 22, it is characterized in that the access control equipment query requests of described remote server, the addressable information of the pairing access control equipment of Target Wireless access point in the foreign subnet is responded based on one of them subnet.
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| CN200810208184A CN101772109A (en) | 2008-12-30 | 2008-12-30 | Method for supporting WLAN roaming switching between different subnets, device and system |
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| CN200810208184A CN101772109A (en) | 2008-12-30 | 2008-12-30 | Method for supporting WLAN roaming switching between different subnets, device and system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102611712A (en) * | 2012-04-10 | 2012-07-25 | 中山爱科数字家庭产业孵化基地有限公司 | Digital home network access and authentication method |
| CN102685812A (en) * | 2012-05-11 | 2012-09-19 | 中国联合网络通信集团有限公司 | Access point (AP) associated terminal control method, device and system |
| CN102833721A (en) * | 2012-08-06 | 2012-12-19 | 福建星网锐捷网络有限公司 | Wireless roaming data forwarding method and wireless access point |
| CN102884762A (en) * | 2012-06-28 | 2013-01-16 | 华为技术有限公司 | Method, devices and system for controlling network paths |
| CN103686890A (en) * | 2012-09-07 | 2014-03-26 | 中兴通讯股份有限公司 | Method and system for realizing wireless terminal roaming switch in wireless local area network |
| CN103997447A (en) * | 2014-05-30 | 2014-08-20 | 宇龙计算机通信科技(深圳)有限公司 | Access point switching method, access point equipment and terminal |
| CN110290567A (en) * | 2019-07-03 | 2019-09-27 | 深信服科技股份有限公司 | Virtual LAN switching method, device, terminal, system and storage medium |
| WO2020019925A1 (en) * | 2018-07-26 | 2020-01-30 | 华为技术有限公司 | Switching method and apparatus, and communications system |
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- 2008-12-30 CN CN200810208184A patent/CN101772109A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102611712A (en) * | 2012-04-10 | 2012-07-25 | 中山爱科数字家庭产业孵化基地有限公司 | Digital home network access and authentication method |
| CN102685812B (en) * | 2012-05-11 | 2015-03-18 | 中国联合网络通信集团有限公司 | Access point (AP) associated terminal control method, device and system |
| CN102685812A (en) * | 2012-05-11 | 2012-09-19 | 中国联合网络通信集团有限公司 | Access point (AP) associated terminal control method, device and system |
| US9755909B2 (en) | 2012-06-28 | 2017-09-05 | Huawei Technologies Co., Ltd. | Method, device and system for controlling network path |
| CN102884762A (en) * | 2012-06-28 | 2013-01-16 | 华为技术有限公司 | Method, devices and system for controlling network paths |
| WO2014000226A1 (en) * | 2012-06-28 | 2014-01-03 | 华为技术有限公司 | Network path control method, device, and system |
| CN102884762B (en) * | 2012-06-28 | 2016-11-16 | 华为技术有限公司 | Network path control method, equipment and system |
| CN102833721B (en) * | 2012-08-06 | 2015-06-17 | 福建星网锐捷网络有限公司 | Wireless roaming data forwarding method and wireless access point |
| CN102833721A (en) * | 2012-08-06 | 2012-12-19 | 福建星网锐捷网络有限公司 | Wireless roaming data forwarding method and wireless access point |
| CN103686890A (en) * | 2012-09-07 | 2014-03-26 | 中兴通讯股份有限公司 | Method and system for realizing wireless terminal roaming switch in wireless local area network |
| CN103686890B (en) * | 2012-09-07 | 2016-12-28 | 中兴通讯股份有限公司 | The method and system of wireless local network wireless terminal roaming switching |
| CN103997447A (en) * | 2014-05-30 | 2014-08-20 | 宇龙计算机通信科技(深圳)有限公司 | Access point switching method, access point equipment and terminal |
| WO2020019925A1 (en) * | 2018-07-26 | 2020-01-30 | 华为技术有限公司 | Switching method and apparatus, and communications system |
| CN110769472A (en) * | 2018-07-26 | 2020-02-07 | 华为技术有限公司 | Switching method, device and communication system |
| CN110290567A (en) * | 2019-07-03 | 2019-09-27 | 深信服科技股份有限公司 | Virtual LAN switching method, device, terminal, system and storage medium |
| CN110290567B (en) * | 2019-07-03 | 2021-04-09 | 深信服科技股份有限公司 | Virtual local area network switching method, device, terminal, system and storage medium |
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Application publication date: 20100707 |