CN104066083B

CN104066083B - Method and device for accessing wireless local area network

Info

Publication number: CN104066083B
Application number: CN201310085304.8A
Authority: CN
Inventors: 相超
Original assignee: Huawei Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2013-03-18
Filing date: 2013-03-18
Publication date: 2020-02-21
Anticipated expiration: 2033-03-18
Also published as: CN104066083A

Abstract

The invention provides a method and a device for accessing a wireless local area network, which can accelerate the speed of accessing the wireless local area network by a user, improve the network access efficiency and improve the user experience. The method comprises the following steps: a wireless Access Point (AP) receives a detection request message sent by a wireless work Station (STA), determines whether to store the association information of the STA according to a Medium Access Control (MAC) address carried by the detection request message, and sends an association response message to the STA if the association information of the STA is determined to be stored; performing key negotiation between the STA and the session association ID carried in the association response message; and allocating the IP address of the access of the wireless local area network to the STA so that the STA accesses network resources according to the IP address. The invention is applicable to the field of communication.

Description

Method and device for accessing wireless local area network

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for accessing a wireless local area network.

Background

With the popularity of mobile wireless products, the demand for users to access wireless networks is increasing. The access procedure of the conventional Wlan (wireless local area network) network includes: after the administrator configures the password, the administrator informs the user who is allowed to Access the Wlan network, the user uses the same password and manually inputs the password, and the STA (Wireless Station) and the AP (Access Point) Access the Wlan network after passing authentication, association and key negotiation.

However, when the STA is disconnected due to some reason, for example, the user equipment is powered off, or the user moves to disconnect the network, or the STA moves and roams among Wlan terminals, and needs to switch to the network quickly, if the STA still follows the access process of the conventional Wlan network, the STA must re-initiate the authentication, association, and key negotiation process to re-acquire the IP address, which results in low efficiency of accessing the wireless lan by the user and greatly reduced user experience.

Disclosure of Invention

Embodiments of the present invention provide a method and an apparatus for accessing a wireless local area network, which can accelerate a speed of accessing a wireless local area network by a user, improve network access efficiency, and improve user experience.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, a method for accessing a wireless local area network is provided, where the method includes:

a wireless Access Point (AP) receives a detection request message sent by a wireless work Station (STA), wherein the detection request message carries a Medium Access Control (MAC) address of the STA;

determining whether to store association information of the STA according to the MAC address, wherein the association information comprises the MAC address of the STA and a session association ID;

if the association information of the STA is determined to be stored, sending an association response message to the STA, wherein the association response message carries the session association ID contained in the association information;

performing key negotiation with the STA according to the session association ID;

and allocating the IP address of the access of the wireless local area network to the STA so that the STA accesses network resources according to the IP address.

In a first possible implementation manner, according to the first aspect, after determining whether to store the association information of the STA according to the MAC address, the method further includes:

and if the association information of the STA is determined not to be stored, storing the association information of the STA after the STA and the AP carry out association negotiation and the session association ID is obtained.

In a second possible implementation manner, according to the first aspect or the first possible implementation manner, the allocating, to the STA, an IP address of the access to the wireless local area network specifically includes:

receiving a Dynamic Host Configuration Protocol (DHCP) discovery message sent by the STA;

sending a DHCP acknowledgement message to the STA;

receiving a DHCP selection message sent by the STA;

and allocating the IP address of the access wireless local area network to the STA according to the DHCP selection message.

In a third possible implementation manner, according to the first aspect, the first possible implementation manner, or the second possible implementation manner, the method further includes:

determining whether to store the IP address of the STA or not according to the MAC address;

if the IP address of the STA is determined not to be stored, storing the IP address of the STA after the AP allocates the IP address of the wireless local area network access to the STA;

if the stored IP address of the STA is determined, the allocating, by the AP, the IP address of the current access to the wireless local area network to the STA specifically includes:

and allocating the stored IP address of the STA to the STA.

In a fourth possible implementation manner, according to the third possible implementation manner, after the allocating, to the STA, the IP address of the current access wireless local area network if it is determined that the IP address of the STA is not stored, the method further includes:

setting an effective access period of the IP address;

storing the effective access period of the IP address;

after the AP receives a probe request message sent by a wireless station STA, the method further includes:

checking whether a valid access period of the stored IP address is over;

and if the stored effective access period of the IP address is ended, deleting the association information of the STA, the IP address and the effective access period of the IP address.

In a fifth possible implementation manner, according to the third possible implementation manner, after the allocating, to the STA, the IP address of the current access wireless local area network if it is determined that the IP address of the STA is not stored, the method further includes:

setting an effective access period of the IP address;

storing the effective access period of the IP address;

after performing key agreement with the STA according to the session association ID, the method further includes:

checking whether a valid access period of the stored IP address is over;

if the stored effective access period of the IP address is finished, the IP address is allocated to the STA again, the effective access period of the IP address is set, and meanwhile, the IP address item and the effective access period item of the IP address of the wireless local area network accessed this time are updated.

In a second aspect, an apparatus for accessing a wireless local area network is provided, where the apparatus includes a receiving unit, a determining unit, a sending unit, a processing unit, and an allocating unit;

the receiving unit is used for receiving a detection request message sent by a wireless Station (STA), wherein the detection request message carries a Medium Access Control (MAC) address of the STA;

the determining unit is configured to determine whether to store association information of the STA according to the MAC address, where the association information includes the MAC address of the STA and a session association ID;

the sending unit is configured to send an association response packet to the STA if the determining unit determines that the association information of the STA has been stored, where the association response packet carries the session association ID included in the association information;

the processing unit is used for carrying out key negotiation with the STA according to the session association ID;

the allocation unit is configured to allocate the IP address of the access to the wireless local area network to the STA, so that the STA accesses a network resource according to the IP address.

In a first possible implementation manner, according to the second aspect, the apparatus further includes a storage unit;

the storage unit is configured to, if the determining unit determines that the association information of the STA is not stored, perform association negotiation between the STA and the AP to obtain the session association ID, and store the association information of the STA.

In a second possible implementation manner, according to the second aspect or the first possible implementation manner, the allocating, by the allocating unit, an IP address of the access to the wireless local area network to the STA specifically includes:

sending a DHCP acknowledgement message to the STA;

receiving a DHCP selection message sent by the STA;

In a third possible implementation form, according to the second aspect or the first possible implementation form or the second possible implementation form,

the determining unit is further configured to determine whether to store the IP address of the STA according to the MAC address;

the storage unit is further configured to, if the determining unit determines that the IP address of the STA is not stored, store the IP address of the STA after the AP allocates the IP address of the wireless local area network to the STA;

if the determining unit determines that the IP address of the STA has been stored, the allocating, to the STA, an IP address of the current access to the wireless lan by the allocating unit specifically includes:

and allocating the stored IP address of the STA to the STA.

In a fourth possible implementation manner, according to the third possible implementation manner, the apparatus further includes a setting unit, a checking unit, and a deleting unit;

the setting unit is used for setting the effective access period of the IP address after the allocation unit allocates the IP address of the wireless local area network access to the STA if the determining unit determines that the IP address of the STA is not stored;

the storage unit is further used for storing the effective access cycle of the IP address;

the checking unit is configured to check whether the stored effective access period of the IP address is finished after the receiving unit receives a probe request packet sent by a wireless station STA;

and the deleting unit is used for deleting the association information of the STA, the IP address and the effective access period of the IP address if the stored effective access period of the IP address is ended.

In a fifth possible implementation manner, according to the third possible implementation manner, the apparatus further includes a setting unit and a checking unit. An update unit;

the checking unit is configured to check whether the valid access period of the stored IP address is finished after the processing unit performs key negotiation with the STA according to the session association ID;

the allocation unit is configured to reallocate an IP address to the STA if the valid access period of the stored IP address is ended;

the setting unit is used for setting the effective access period of the IP address;

and the updating unit is used for updating the IP address item and the effective access cycle item of the IP address accessed to the wireless local area network.

In a third aspect, an apparatus for accessing a wireless local area network is provided, the apparatus including a receiver, a processor, and a transmitter;

the receiver is configured to receive a probe request packet sent by a wireless station STA, and send the probe request packet to the processor, where the probe request packet carries a medium access control MAC address of the STA;

the processor is configured to receive a probe request packet sent by the receiver, and determine whether to store association information of the STA according to the MAC address, where the association information includes the MAC address of the STA and a session association ID;

the transmitter is configured to transmit an association response packet to the STA if it is determined that the association information of the STA is stored, where the association response packet carries the session association ID included in the association information;

the processor is further configured to perform key agreement with the STA according to the session association ID;

the processor is further configured to allocate an IP address of the access to the wireless local area network to the STA, so that the STA accesses a network resource according to the IP address.

In a first possible implementation manner, according to a third aspect, the apparatus further includes a memory;

the memory is configured to, after the processor determines whether to store the association information of the STA according to the MAC address, perform association negotiation between the STA and the AP to obtain the session association ID if it is determined that the association information of the STA is not stored, and store the association information of the STA.

In a second possible implementation manner, according to the third aspect or the first possible implementation manner, the allocating, by the processor, an IP address of the access to the wireless local area network to the STA specifically includes:

sending a DHCP acknowledgement message to the STA;

receiving a DHCP selection message sent by the STA;

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

the processor is further configured to determine whether to store an IP address of the STA according to the MAC address;

the memory is further configured to store the IP address of the STA after the AP allocates the IP address of the current access wireless local area network to the STA if the processor determines that the IP address of the STA is not stored;

if the processor determines that the IP address of the STA has been stored, the allocating, by the processor, the IP address of the current access to the wireless local area network to the STA specifically includes:

and allocating the stored IP address of the STA to the STA.

In a fourth possible implementation manner, according to the third possible implementation manner, if it is determined that the IP address of the STA is not stored, after the IP address of the wireless local area network is allocated to the STA, setting an effective access period of the IP address;

the memory is also used for storing the effective access cycle of the IP address;

the processor is further configured to check whether the stored effective access period of the IP address is finished after the receiver receives a probe request message sent by a wireless station STA;

the processor is further configured to delete the association information of the STA, the IP address, and the effective access period of the IP address if the stored effective access period of the IP address is ended.

In a fifth possible implementation, according to a third possible implementation,

the processor is further configured to set an effective access period of the IP address after the IP address of the current access wireless local area network is allocated to the STA if it is determined that the IP address of the STA is not stored;

the processor is further configured to check whether an effective access period of the stored IP address is finished after performing key negotiation with the STA according to the session association ID;

and the processor is further configured to, if the stored effective access period of the IP address is finished, re-allocate the IP address to the STA, set the effective access period of the IP address, and update the IP address entry and the effective access period entry of the IP address accessed to the wireless local area network this time.

The embodiment of the invention provides a method and a device for accessing a wireless local area network, wherein the method comprises the following steps: a wireless access point receives a detection request message sent by a wireless work Station (STA), wherein the detection request message carries an MAC (media access control) address of the STA; determining whether to store the association information of the STA according to the MAC address; if the association information of the STA is determined to be stored, sending an association response message to the STA, wherein the association response message carries the session association ID contained in the association information; performing key negotiation with the STA according to the session association ID; and allocating the IP address of the access of the current wireless local area network to the STA, so that the STA allocates network resources according to the IP address.

Based on the method and the device for accessing the wireless local area network provided by the embodiment of the invention, when the STA needs to be switched into the network quickly after the network is disconnected due to some reason, such as the shutdown of user equipment, the network is disconnected due to the movement of a user, or the STA moves and roams among Wlan terminals, the key negotiation process between the STA and the AP can be directly performed according to the session association ID contained in the association information of the STA stored in the AP of the wireless access point, and the authentication and association handshake processes are skipped, so that the network access process is simplified, the efficiency of accessing the wireless local area network by the user is improved, and the user experience is improved.

Drawings

Fig. 1 is a method for accessing a wireless local area network according to an embodiment of the present invention;

fig. 2 is a diagram illustrating another method for accessing a wireless local area network according to an embodiment of the present invention;

fig. 3 is a diagram illustrating another method for accessing a wireless local area network according to an embodiment of the present invention;

fig. 4 is a diagram of interaction information between an STA and an AP according to an embodiment of the present invention;

fig. 5 is a diagram of another information interaction between an STA and an AP according to an embodiment of the present invention;

fig. 6 is a diagram illustrating an apparatus for accessing a wireless local area network according to an embodiment of the present invention;

fig. 7 is a diagram illustrating another apparatus for accessing a wireless local area network according to an embodiment of the present invention;

fig. 8 is a diagram illustrating another apparatus for accessing a wireless local area network according to an embodiment of the present invention;

fig. 9 is a diagram illustrating another apparatus for accessing a wireless local area network according to an embodiment of the present invention;

fig. 10 is a diagram illustrating another apparatus for accessing a wireless local area network according to an embodiment of the present invention;

fig. 11 is a diagram illustrating another apparatus for accessing a wireless local area network according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment,

An embodiment of the present invention provides a method for accessing a wireless local area network, and specifically, as shown in fig. 1, the method includes:

101. the method comprises the steps that a wireless Access Point (AP) receives a detection request message sent by a wireless work Station (STA), wherein the detection request message carries a Media Access Control (MAC) address of the STA.

Specifically, the AP broadcasts information of the AP, including a name, an authentication mode, an encryption mode, a working mode, and the like of the AP. And the STA selects a proper AP to access according to the information broadcast by the AP. And in the process of accessing the wireless local area network, the STA sends a detection request message to the AP, wherein the detection request message carries the MAC address of the STA.

102. And determining whether to store association information of the STA according to the MAC address, wherein the association information comprises the MAC address of the STA and a session association ID.

Specifically, after receiving a probe request message sent by an STA, the AP performs message analysis on the probe request message to obtain an MAC address of the STA, and then determines whether to store association information of the STA according to the MAC address.

103. And if the association information of the STA is determined to be stored, sending an association response message to the STA, wherein the association response message carries the session association ID contained in the association information.

Specifically, because the association information including the session association ID of the STA is stored in the AP, the process of obtaining the session association ID of the STA through authentication and association handshake can be skipped between the STA and the AP, and the session association ID of the STA is directly obtained from the association information stored in the AP, thereby simplifying the network access process and improving the network access efficiency.

104. And carrying out key negotiation with the STA according to the association session ID.

Specifically, in order to protect the security of the user network and ensure that only a user with a correct password is allowed to legally use the network resource, in the process of accessing the wireless local area network, key negotiation is performed between the AP and the STA.

105. And allocating the IP address of the access of the wireless local area network to the STA so that the STA accesses network resources according to the IP address.

Specifically, after the AP and the STA complete key negotiation, the STA and the AP further need to perform DHCP negotiation, where the DHCP negotiation is to obtain an IP address of the STA accessing the wireless lan this time, and the allocating the IP address of the STA accessing the wireless lan this time may include:

sending a DHCP acknowledgement message to the STA;

receiving a DHCP selection message sent by the STA;

Of course, if the AP stores the IP address of the STA after the AP allocates the IP address of the wireless lan to the STA, the allocating, by the AP, the IP address of the wireless lan to the STA may specifically include:

and allocating the stored IP address of the STA to the STA.

The process simplifies the process of DHCP negotiation, skips the process of discovery and selection handshake negotiation in DHCP negotiation, simplifies the network access flow and improves the network access efficiency.

The embodiment of the present invention only describes that the STA is allocated with the IP address of the wireless lan access this time, and how to allocate the IP address is not specifically limited, and may be determined according to the storage condition of the IP address of the STA.

Further, after determining whether the association information of the STA exists according to the MAC address, if it is determined that the association information of the STA is not stored, as shown in fig. 2, the method further includes:

201. the method comprises the steps that a wireless Access point receives a detection request message sent by a wireless work Station (STA), wherein the detection request message carries a Media Access Control (MAC) address of the STA.

202. And determining whether to store association information of the STA according to the MAC address, wherein the association information comprises the MAC address of the STA and a session association ID.

203. And if the association information of the STA is determined not to be stored, storing the association information of the STA after the STA and the AP carry out association negotiation and the session association ID is obtained.

Specifically, the process of performing association negotiation between the STA and the AP belongs to the prior art, and the embodiment of the present invention is not specifically limited to this, but only illustrates that association negotiation is performed between the STA and the AP, and after the session association ID is obtained, association information of the STA is also stored.

204. And carrying out key negotiation with the STA according to the association session ID.

205. And allocating the IP address of the access of the wireless local area network to the STA so that the STA accesses network resources according to the IP address.

Specifically, when the STA first accesses the AP, and after the AP allocates the IP address of the wireless local area network to the STA, the AP may store the IP address of the wireless local area network that the STA accesses, and as shown in fig. 3, the method further includes:

301. the method comprises the steps that a wireless Access Point (AP) receives a detection request message sent by a wireless work Station (STA), wherein the detection request message carries a Media Access Control (MAC) address of the STA.

302. And determining whether to store association information of the STA according to the MAC address, wherein the association information comprises the MAC address of the STA and a session association ID.

If it is determined that the association information of the STA is not stored, performing step 303;

if it is determined that association information of the STA has been stored, step 304 is performed.

303. And if the association information of the STA is determined not to be stored, storing the association information of the STA after the STA and the AP carry out association negotiation and the session association ID is obtained.

Specifically, the process of performing association negotiation between the STA and the AP belongs to the prior art, and the embodiment of the present invention is not particularly limited, but only illustrates that association negotiation is performed between the STA and the AP, and after the session association ID is obtained, association information of the STA is stored.

304. And if the association information of the STA is determined to be stored, sending an association response message to the STA, wherein the association response message carries the session association ID contained in the association information.

305. And carrying out key negotiation with the STA according to the association session ID.

306. And determining whether to store the IP address of the STA or not according to the MAC address.

Specifically, if it is determined that the IP address of the STA is not stored, step 307 is executed;

if it is determined that the IP address of the STA has been stored, step 308 is performed.

307. And if the IP address of the STA is determined not to be stored, storing the IP address of the STA after the AP allocates the IP address of the access wireless local area network to the STA.

Specifically, if it is determined that the IP address of the STA is not stored, the process of allocating, by the AP, the IP address of the current access to the wireless local area network to the STA may include:

sending a DHCP acknowledgement message to the STA;

receiving a DHCP selection message sent by the STA;

308. And if the IP address of the STA is determined to be stored, allocating the stored IP address of the STA to the STA.

Specifically, if the stored IP address of the STA is determined, the stored IP address of the STA may be directly allocated to the STA, which simplifies the DHCP negotiation process, skips the discovery and selection handshake negotiation process in the DHCP negotiation, simplifies the network access procedure, and improves the network access efficiency.

The embodiment of the invention provides a method for accessing a wireless local area network, which comprises the following steps: a wireless access point receives a detection request message sent by a wireless work Station (STA), wherein the detection request message carries an MAC (media access control) address of the STA; determining whether to store the association information of the STA according to the MAC address; if the association information of the STA is determined to be stored, sending an association response message to the STA, wherein the association response message carries the session association ID contained in the association information; performing key negotiation with the STA according to the session association ID; and allocating the IP address of the access of the current wireless local area network to the STA, so that the STA allocates network resources according to the IP address.

Based on the method for accessing the wireless local area network provided by the embodiment of the invention, when the STA needs to be switched into the network quickly due to network disconnection caused by some reason, such as shutdown of user equipment, or after the user moves and network disconnection, or the STA moves and roams among Wlan terminals, the key negotiation process between the STA and the AP can be directly performed according to the session association ID contained in the association information of the STA stored in the AP of the wireless access point, and the authentication and association handshake processes are skipped, so that the network access process is simplified, the efficiency of accessing the wireless local area network by the user is improved, and the user experience is improved.

Example II,

An embodiment of the present invention further provides a method for accessing a wireless local area network, specifically, when association information of the STA is not stored and an IP address of the STA is not stored in the embodiment shown in fig. 3, an interaction between the AP and the STA is described in detail, and as shown in fig. 4, the method includes:

401. the AP broadcasts hotspot information to enable STAs to discover the AP.

Specifically, the AP broadcasts information of the AP, including a name, an authentication mode, an encryption mode, a working mode, and the like of the AP. And the STA selects a proper AP to access according to the information broadcast by the AP.

402. And the STA sends a detection request message to the AP.

And in the process of accessing the wireless local area network, the STA sends a detection request message to the AP, wherein the detection request message carries the MAC address of the STA.

403. And the AP receives a detection request message sent by the STA.

404. And the AP determines whether to store the association information of the STA, wherein the association information comprises the MAC address of the STA and a session association ID.

405. And if the association information of the STA is not stored, the AP sends a detection response message to the STA.

406. And the STA receives the detection response message sent by the AP.

407. And the STA sends an authentication request message to the AP.

408. And the AP receives an authentication request message sent by the STA.

Specifically, in the process of accessing the wireless local area network by the user, an authentication negotiation needs to be performed, where the authentication negotiation specifically refers to whether identities of both parties are matched, for example, whether the identities are open or shared.

409. And the AP sends an authentication response message to the STA.

410. And the STA receives the authentication response message sent by the AP.

411. And the STA sends an association request message to the AP.

412. And the AP receives an association request message sent by the STA.

Specifically, in the process of accessing the wireless local area network by the user, association negotiation needs to be performed, where the association negotiation specifically refers to whether the configuration information of the two parties is matched, such as an encryption mode and a working mode.

Specifically, the encryption mode of the wireless lan may include: WPA-PSK/TKIP (Wi-Fi Protected Access-Pre-Shared Key/Temporal Key integrity protocol, WiFi Protected Access of Pre-Shared Key/Temporal Key integrity protocol) mode using Temporal Key integrity protocol algorithm, WPA2-PSK/AES (Wi-Fi Protected Access2-Pre-Shared Key/advanced encryption Standard, WiFi Protected Access added version of Pre-Shared Key/advanced encryption Standard) mode using advanced encryption Standard algorithm, etc.

The working mode of the wireless local area network may include: 11B, 11G, 11N, etc., determined by different rate sets.

413. The AP allocates a session association ID to the STA, so that the AP obtains the session association ID.

Specifically, after receiving an association request message sent by an STA, the AP allocates a session association ID to the STA.

414. And the AP sends an association response message to the STA, wherein the association response message carries the session association ID distributed to the STA by the AP, so that the STA initiates key negotiation with the AP according to the session association ID.

415. And the AP stores the association information of the STA, wherein the association information comprises the MAC address and the session association ID of the STA.

It should be noted that, the sequence of steps 415 and 414, and the subsequent step 416 and 425 is not limited, and only the association information of the STA is stored after the AP allocates the session association ID to the STA, where the association information includes the MAC address of the STA and the session association ID.

416. And the STA receives the association response message sent by the AP.

417. And the STA performs key negotiation with the AP according to the session association ID.

418. The STA sends a DHCP discovery message.

419. AP receives the DHCP discovery message

Specifically, after the AP and the STA complete key negotiation, DHCP negotiation is also required between the STA and the AP, where the DHCP negotiation is to obtain an IP address of the STA accessing the wireless lan this time.

The DHCP negotiation process is initiated by the STA, namely the STA sends a DHCP discovery message to the AP.

420. And the AP determines whether to store the IP address of the STA or not according to the MAC address.

421. And if the IP address of the STA is not stored, the AP sends a DHCP confirmation message to the STA.

422. And the STA receives the DHCP acknowledgement message sent by the STA.

423. The STA sends a DHCP selection message.

424. The AP receives the DHCP selection message.

425. And the AP allocates the IP address of the access wireless local area network to the STA according to the DHCP selection message.

426. And the AP stores the IP address of the STA accessing the wireless local area network.

It should be noted that, step 426 and steps 427 and 428 do not limit the sequence, but only describe that after the AP allocates the IP address to the STA, the IP address of the STA accessing the wireless lan this time is stored.

Step 415 and step 426 may be executed simultaneously, or step 415 may be executed first and then step 426 is executed, which is not limited in this embodiment of the present invention.

427. And sending a DHCP binding message to the STA, wherein the DHCP binding message carries the IP address of the current access wireless local area network.

428. And the STA acquires the IP address and accesses network resources according to the IP address.

Specifically, after the AP sends a DHCP binding packet to the STA, because the DHCP binding packet carries an IP address of the STA accessing the wireless local area network this time, the STA may obtain the IP address and may access network resources according to the IP address.

An embodiment of the present invention further provides a method for accessing a wireless local area network, specifically, when the embodiment shown in fig. 3 is used to store association information of the STA and store an IP address of the STA, an interaction between the AP and the STA is described, specifically as shown in fig. 5, the method includes:

501. the AP broadcasts hotspot information to enable STAs to discover the AP.

502. And the STA sends a detection request message to the AP.

503. And the AP receives a detection request message sent by the STA.

504. And the AP determines whether to store the association information of the STA, wherein the association information comprises the MAC address of the STA and a session association ID.

505. And if the association information of the STA is determined to be stored, sending an association response message to the STA, wherein the association response message carries the session association ID contained in the association information, so that the STA initiates key negotiation with the AP according to the session association ID.

Specifically, because the AP stores the association information including the session association ID of the STA, the process of obtaining the session association ID of the STA through authentication and association handshake as described in step 405 and 413 may be skipped between the STA and the AP, and the session association ID of the STA is directly obtained from the association information stored in the AP, thereby simplifying the network access process and improving the network access efficiency.

506. And the STA receives the association response message sent by the AP.

507. And the STA performs key negotiation with the AP according to the session association ID.

508. The STA sends a DHCP discovery message.

509. AP receives the DHCP discovery message

510. And the AP determines whether to store the IP address of the STA or not according to the MAC address.

511. And if the IP address of the STA is determined to be stored, allocating the stored IP address of the STA to the STA.

512. And the AP sends a DHCP binding message to the STA, wherein the DHCP binding message carries the IP address of the current access wireless local area network.

513. And the STA acquires the IP address and accesses network resources according to the IP address.

The situation described in fig. 4 that the association information is not stored and the IP address of the STA is not stored generally corresponds to a situation that the wireless working station accesses the wireless lan for the first time, and if the MAC address, the session association ID, and the IP address of the STA that is currently accessed to the wireless lan can be stored when the wireless working station accesses the wireless lan for the first time, after the STA disconnects from the network for some reason, for example, the user equipment is powered off, or the user moves to disconnect the network or the STA moves and roams among Wlan terminals, and needs to access the network quickly, as shown in fig. 5, the discovery and selection handshake negotiation process in authentication, association handshake and DHCP negotiation can be skipped directly, and the network is accessed to the network that has been connected, so that the network access process is simplified, the network access efficiency is improved, and the IP address of the STA that is accessed to the wireless lan is maintained as much as possible, thereby improving the user experience.

Of course, the embodiment shown in fig. 3 also includes a case where the association information of the STA is not stored and the IP address of the STA is stored, and this case may be described in conjunction with the interaction between the AP and the STA when the association information of the STA is not stored in fig. 4 and the interaction between the AP and the STA when the IP address of the STA is stored in fig. 5, which is not described herein again in the embodiments of the present invention.

In addition, the embodiment shown in fig. 3 further includes a case where the association information of the STA is stored and the IP address of the STA is not stored, and this case may be described in conjunction with the interaction between the AP and the STA when the association information of the STA is stored in fig. 5 and the interaction between the AP and the STA when the IP address of the STA is not stored in fig. 4, which is not described herein again in the embodiments of the present invention.

Based on the embodiment shown in fig. 3, further, if it is determined that the IP address of the STA is not stored, after the AP allocates the IP address of the current access to the wireless local area network to the STA, the method further includes:

setting an effective access period of the IP address;

storing the effective access period of the IP address;

checking whether a valid access period of the stored IP address is over;

It should be noted that the effective access period of the IP address is different from a DHCP lease, where the DHCP lease is a lifetime of the IP address carried when the AP allocates an IP address to the STA through DHCP in a session, and the effective access period of the IP address marks that the STA can repeatedly occupy an effective lifetime of the IP address.

Through the effective access period for setting the IP address, a certain wireless working station STA can be prevented from always occupying a certain associated ID or a certain IP address, other wireless working stations are guaranteed to have an opportunity to quickly access network resources, and the fairness and reasonability of the wireless access point are improved.

Specifically, after setting the effective access period of the IP address, after receiving a probe request packet sent by the wireless station each time, first checking whether the stored effective access period of the IP address is finished.

If the access is finished, the association information of the STA, the IP address of the STA, and the effective access period of the IP address may be deleted, and the processes of authentication, association, key negotiation, DHCP negotiation, and the like, which are executed when the wireless lan is initially accessed as described in step 203-205 or step 405-427, are restarted.

Optionally, if it is determined that the IP address of the STA is not stored, after the AP allocates the IP address of the current access to the wireless local area network to the STA, the method further includes:

setting an effective access period of the IP address;

storing the effective access period of the IP address;

checking whether a valid access period of the stored IP address is over;

The difference from the above embodiment is that after determining that the valid period of the STA is over, the embodiment only reallocates the IP address to the STA, and does not delete the association information together, so that after the AP reallocates the IP address to the STA, only the IP address entry of the current access wireless local area network and the valid access period entry of the IP address need to be updated, and the session association ID of the STA is not changed.

Example III,

An embodiment of the present invention provides an apparatus 600 for accessing a wireless local area network, and specifically, as shown in fig. 6, the apparatus 600 includes a receiving unit 601, a determining unit 602, a sending unit 603, a processing unit 604, and an allocating unit 605.

The receiving unit 601 is configured to receive a probe request packet sent by a wireless station STA, where the probe request packet carries a medium access control MAC address of the STA.

The determining unit 602 is configured to determine whether to store association information of the STA according to the MAC address, where the association information includes the MAC address of the STA and a session association ID.

The sending unit 603 is configured to send an association response packet to the STA if the determining unit 602 determines that the association information of the STA is already stored, where the association response packet carries the session association ID included in the association information.

The processing unit 604 is configured to perform key agreement with the STA according to the session association ID.

The allocating unit 605 is configured to allocate the IP address of the access to the wireless local area network to the STA, so that the STA accesses a network resource according to the IP address.

Further, as shown in fig. 7, the apparatus 600 further includes a storage unit 606.

The storage unit 606 is configured to, if the determining unit 602 determines that the association information of the STA is not stored, store the association information of the STA after the STA performs association negotiation with the AP and obtains the session association ID.

Further, the allocating, by the allocating unit 605, the allocating, to the STA, the IP address of the current access to the wireless lan specifically includes:

sending a DHCP acknowledgement message to the STA;

receiving a DHCP selection message sent by the STA;

Further, the determining unit 602 is further configured to determine whether to store the IP address of the STA according to the MAC address.

The storage unit 606 is further configured to, if the determining unit 602 determines that the IP address of the STA is not stored, store the IP address of the STA after the allocating unit 605 allocates the IP address of the wireless local area network to the STA this time;

if the determining unit 602 determines that the IP address of the STA is already stored, the allocating unit 605 specifically includes:

and allocating the stored IP address of the STA to the STA.

Further, as shown in fig. 8, the apparatus 600 further includes a setting unit 607, a checking unit 608, and a deleting unit 609.

The setting unit 607 is configured to set an effective access period of the IP address after the allocating unit 605 allocates the IP address of the current access wireless local area network to the STA if the determining unit 602 determines that the IP address of the STA is not stored.

The storage unit 606 is further configured to store the effective access cycle of the IP address.

The checking unit 608 is configured to check whether the valid access period of the stored IP address is finished after the receiving unit 601 receives a probe request packet sent by a wireless station STA.

The deleting unit 609 is configured to delete the association information of the STA, the IP address, and the valid access period of the IP address if the stored valid access period of the IP address is ended.

Optionally, as shown in fig. 9, the apparatus further includes a setting unit 607, a checking unit 608, and an updating unit 610.

The checking unit 608 is configured to check whether the valid access period of the stored IP address is finished after the processing unit 604 performs key negotiation with the STA according to the session association ID.

The allocating unit 605 is configured to, if the valid access period of the stored IP address is ended, reallocate an IP address to the STA.

The setting unit 607 is configured to set a valid access cycle of the IP address.

The updating unit 610 is configured to update the IP address entry and the effective access cycle entry of the IP address of the current access to the wireless lan.

Specifically, the device accessing the wireless local area network corresponds to a wireless access point.

Specifically, the method for accessing a wireless local area network through the apparatus for accessing a wireless local area network may refer to the descriptions of the first embodiment and the second embodiment, and the embodiments of the present invention are not described herein again.

The embodiment of the invention provides a device for accessing a wireless local area network, which comprises: the device comprises a receiving unit, a determining unit, a sending unit, a processing unit and an allocating unit. The receiving unit receives a detection request message sent by a wireless working Station (STA), wherein the detection request message carries an MAC address of the STA; the determining unit determines whether to store the association information of the STA according to the MAC address; if the association information of the STA is determined to be stored, the sending unit sends an association response message to the STA, wherein the association response message carries the session association ID contained in the association information; the processing unit negotiates with the STA a key according to the session association ID; the allocation unit is configured to allocate the IP address of the access to the wireless local area network to the STA, so that the STA accesses a network resource according to the IP address.

Based on the device for accessing the wireless local area network provided by the embodiment of the invention, when the STA needs to be switched into the network quickly due to network disconnection caused by some reason, such as shutdown of user equipment, or after the user moves and network disconnection, or when the STA moves and roams among Wlan terminals, the key negotiation process between the STA and the AP can be directly performed according to the session association ID contained in the association information of the STA stored in the AP of the wireless access point, and the authentication and association handshake processes are skipped, so that the network access process is simplified, the efficiency of accessing the wireless local area network by the user is improved, and the user experience is improved.

Example four,

An embodiment of the present invention provides an apparatus 1000 for accessing a wireless local area network, and specifically, as shown in fig. 10, the apparatus 1000 includes a receiver 1001, a processor 1002, and a transmitter 1003.

The receiver 1001 is configured to receive a probe request packet sent by a wireless station STA, and send the probe request packet to the processor 1002, where the probe request packet carries a MAC address of the STA.

The processor 1002 is configured to receive a probe request packet sent by the receiver 1001, and determine whether to store association information of the STA according to the MAC address, where the association information includes the MAC address of the STA and a session association ID.

The transmitter 1003 is configured to send an association response packet to the STA if it is determined that the association information of the STA is already stored, where the association response packet carries the session association ID included in the association information.

The processor 1002 is further configured to perform key agreement with the STA according to the session association ID.

The processor 1002 is further configured to allocate an IP address of accessing the wireless local area network to the STA, so that the STA accesses a network resource according to the IP address.

Further, as shown in fig. 11, the apparatus 1000 further includes a memory 1004.

The memory 1004 is configured to, after the processor 1002 determines whether to store the association information of the STA according to the MAC address, if it is determined that the association information of the STA is not stored, perform association negotiation between the STA and the AP to obtain the session association ID, and then store the association information of the STA.

Further, the allocating, by the processor 1002, the IP address of the current access to the wireless local area network to the STA specifically includes:

sending a DHCP acknowledgement message to the STA;

receiving a DHCP selection message sent by the STA;

Further, the processor 1002 is further configured to determine whether to store the IP address of the STA according to the MAC address.

The memory 1004 is further configured to, if the processor determines that the IP address of the STA is not stored, store the IP address of the STA after the AP allocates the IP address of the wireless local area network to the STA.

If the processor 1002 determines that the IP address of the STA has been stored, the allocating, by the processor 1002, the IP address of the current access to the wireless local area network to the STA specifically includes:

and allocating the stored IP address of the STA to the STA.

Further, the processor 1002 is further configured to set an effective access period of the IP address after allocating the IP address of the current access to the wireless local area network to the STA if it is determined that the IP address of the STA is not stored.

The memory 1004 is further configured to store the effective access period of the IP address.

The processor 1002 is further configured to check whether the stored effective access period of the IP address is finished after the receiver 1001 receives a probe request packet sent by a wireless station STA.

The processor 1002 is further configured to delete the association information of the STA, the IP address, and the effective access period of the IP address if the stored effective access period of the IP address is ended.

Optionally, the processor 1002 is further configured to set an effective access period of the IP address after the IP address of the current access wireless local area network is allocated to the STA if it is determined that the IP address of the STA is not stored.

The processor 1002 is further configured to check whether an effective access period of the stored IP address is finished after performing key negotiation with the STA according to the session association ID.

The processor 1002 is further configured to, if the stored effective access period of the IP address is finished, re-allocate the IP address to the STA, set the effective access period of the IP address, and update the IP address entry and the effective access period entry of the IP address accessed to the wireless local area network this time.

The embodiment of the invention provides a device for accessing a wireless local area network, which comprises: receiver, processor, sender. The receiver receives a detection request message sent by a wireless working Station (STA), wherein the detection request message carries an MAC address of the STA; the processor determines whether to store the association information of the STA according to the MAC address; if the association information of the STA is determined to be stored, the transmitter transmits an association response message to the STA, wherein the association response message carries the session association ID contained in the association information; the processor performs key agreement with the STA according to the session association ID; the processor is further configured to allocate an IP address of the access to the wireless local area network to the STA, so that the STA accesses a network resource according to the IP address.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for accessing a wireless local area network, the method comprising:

according to the MAC address, the AP determines whether to store association information of the STA on the AP side, wherein the association information comprises the MAC address of the STA and a session association ID, and the session association ID is obtained by association negotiation between the STA and the AP;

if the AP determines that the association information of the STA is stored at the AP side, sending an association response message to the STA, wherein the association response message carries the session association ID;

the AP negotiates a key with the STA according to the session association ID;

and the AP allocates the IP address of the access to the wireless local area network to the STA so that the STA accesses network resources according to the IP address.

2. The method according to claim 1, wherein after said determining whether to store the association information of the STA on the AP side according to the MAC address, further comprising:

3. The method according to claim 1 or 2, wherein the allocating the IP address of the current access to the wlan to the STA specifically comprises:

sending a DHCP acknowledgement message to the STA;

receiving a DHCP selection message sent by the STA;

4. The method according to claim 1 or 2, characterized in that the method further comprises:

and allocating the stored IP address of the STA to the STA.

5. The method according to claim 4, wherein after said assigning the IP address of the current access wlan to the STA if it is determined that the IP address of the STA is not stored, further comprising:

setting an effective access period of the IP address;

storing the effective access period of the IP address;

checking whether a valid access period of the stored IP address is over;

6. The method according to claim 4, wherein after said assigning the IP address of the current access wlan to the STA if it is determined that the IP address of the STA is not stored, further comprising:

setting an effective access period of the IP address;

storing the effective access period of the IP address;

checking whether a valid access period of the stored IP address is over;

7. An apparatus for accessing a wireless local area network, the apparatus comprising a receiving unit, a determining unit, a transmitting unit, a processing unit, an allocating unit and a storing unit;

the determining unit is configured to determine, according to the MAC address, whether a storage unit stores association information of the STA, where the association information includes the MAC address of the STA and a session association ID, and the session association ID is obtained through association negotiation between the STA and the device accessing the wireless local area network;

8. The apparatus of claim 7,

the storage unit is further configured to, if the determining unit determines that the association information of the STA is not stored, perform association negotiation between the STA and the device accessing the wireless local area network, and store the association information of the STA after obtaining the session association ID.

9. The apparatus according to claim 7 or 8, wherein the allocating unit allocates the IP address of the current wlan access to the STA specifically includes:

sending a DHCP acknowledgement message to the STA;

receiving a DHCP selection message sent by the STA;

10. The apparatus according to claim 7 or 8,

the storage unit is further configured to, if the determination unit determines that the IP address of the STA is not stored, store the IP address of the STA after the allocation unit allocates the IP address of the wireless local area network to the STA this time;

and allocating the stored IP address of the STA to the STA.

11. The apparatus according to claim 10, further comprising a setting unit, a checking unit, a deleting unit;

12. The apparatus according to claim 10, further comprising a setting unit, a checking unit, an updating unit;

13. An apparatus for accessing a wireless local area network, the apparatus comprising a receiver, a processor, a transmitter, and a memory;

the processor is configured to receive a probe request packet sent by the receiver, and determine whether the memory stores association information of the STA according to the MAC address, where the association information includes the MAC address of the STA and a session association ID, and the session association ID is obtained through association negotiation between the STA and the device accessing the wireless local area network;

14. The apparatus of claim 13, wherein the memory is further configured to, after the processor determines whether to store the association information of the STA according to the MAC address, if it is determined that the association information of the STA is not stored, perform association negotiation between the STA and the apparatus accessing the wireless local area network to obtain the session association ID, and then store the association information of the STA.

15. The apparatus according to claim 13 or 14, wherein the processor allocating the IP address of the current wlan access to the STA specifically comprises:

sending a DHCP acknowledgement message to the STA;

receiving a DHCP selection message sent by the STA;

16. The apparatus of claim 13 or 14,

the memory is further configured to store the IP address of the STA after the device accessing the wireless local area network allocates the IP address of the wireless local area network this time to the STA if the processor determines that the IP address of the STA is not stored;

and allocating the stored IP address of the STA to the STA.

17. The apparatus of claim 16,

18. The apparatus of claim 16,