CN110278586A

CN110278586A - Frame response method and relevant apparatus

Info

Publication number: CN110278586A
Application number: CN201810211784.0A
Authority: CN
Inventors: 张琦; 李卿卿
Original assignee: Huawei Technologies Co Ltd
Current assignee: XFusion Digital Technologies Co Ltd
Priority date: 2018-03-14
Filing date: 2018-03-14
Publication date: 2019-09-24
Anticipated expiration: 2038-03-14
Also published as: CN110278586B

Abstract

Disclose frame response method and relevant apparatus.Method includes: the independent address frame that the WLAN processing chip receiving terminal apparatus of AP is sent, the TA of independent address frame is the MAC Address of terminal device, the RA of independent address frame is target BSSID, target BSSID provides the BSSID used when service for AP for terminal device, AP for terminal device provides the neighbor AP of the BSSID used when service and AP, and for terminal device to provide the BSSID used when service identical, the overlay area of neighbor AP exists with the overlay area of AP to be overlapped, and AP and neighbor AP are by an AP controller management；If response corresponding with the MAC Address is designated as the first value in response indicator register in WLAN processing chip, WLAN handles chip and replys response frame to terminal device, and response is designated as the first value and is used to indicate terminal device connecting with AP.The scheme of the design of more BSSID can be met.

Description

Frame response method and relevant apparatus

Technical field

The present invention relates to field of communication technology more particularly to frame response methods and relevant apparatus.

Background technique

WLAN (English: wireless local area network, WLAN) is a kind of short-distance wireless communication Network.The covering radius of WLAN is small, indoors usually 20 meters (m)~30m, is usually 100m or so in outdoor.Terminal device When mobile, terminal device switches between access point (English: access point, AP).Terminal device switches between AP refers to end End equipment disconnects with previous AP and connect the latter AP.During terminal device switching, terminal device can be of short duration Disconnection and the connection of WLAN, so as to service disconnection occur.

Under some scenes (such as medical scene), terminal device is needed to keep business not interrupt in the process of switching.

Summary of the invention

The application provides frame response method and relevant apparatus, the probability of service disconnection when reducing terminal device switching.

In a first aspect, providing a kind of frame response method, this method can be applied to the AP for having wireless access function, the party Method includes:

The independent address frame that the WLAN processing chip receiving terminal apparatus of AP is sent, the sender address of the independent address frame (English: transmitter address, TA) is the medium access control (English: medium access of the terminal device Control, MAC) address, the recipient address (English: receiver address, RA) of the independent address frame is that target is basic Service set (English: basic service set identifier, BSSID), target BSSID is that the AP is the terminal Equipment provides the BSSID used when service, which provides the neighbours of the BSSID used when service He the AP for the terminal device AP provides that the BSSID used when service is identical for the terminal device, and the overlay area of the neighbor AP is deposited with the overlay area of the AP In overlapping region, the AP and the neighbor AP are by an AP controller management；If the response instruction in WLAN processing chip is posted Response corresponding with the MAC Address of the terminal device is designated as the first value in storage, which handles chip to the terminal device Reply response frame, which is designated as the first value and is used to indicate the terminal device connecting with the AP.

In the technical scheme, used BSSID when providing service due to AP and its neighbor AP for a terminal device Identical, when terminal device moves between the AP and its neighbor AP, which is perceived less than switching.Although the AP and its Neighbor AP all receive the terminal device transmission independent address frame with reduce terminal device transmission independent address frame loss can Can, the AP only connecting with terminal device replys response frame to avoid the conflict of response frame.Due to being used in WLAN processing chip Increase the method for response indicator register rather than is directly chosen whether using the method for the mask of tradition WLAN processing chip Response frame is replied, the applicability of the technical solution is wider.

With reference to first aspect, in the first realization of first aspect, the above method further include:

If the response indicate that lacking response instruction corresponding with the MAC Address in register, WLAN processing chip is neglected Slightly response frame is replied to the terminal device；Alternatively, if the response indicate that response instruction corresponding with the MAC Address in register For second value, WLAN processing chip, which is ignored to the terminal device, replys response frame.

With reference to first aspect or the first realization of first aspect, in being realized at second of first aspect, at the WLAN Reason chip is replied to terminal device before response frame further include:

The processor of the AP receives the first notification message of AP controller transmission, which includes the terminal The MAC Address of equipment；The processor sends the first instruction to WLAN processing chip according to first notification message；At the WLAN Reason chip, will be corresponding with the MAC Address in the response indicator register of WLAN processing chip in response to first instruction Response instruction is set to the first value.

Here, the first notification message is to determine to be connect by AP with terminal device to provide for terminal device in the AP controller It is sent to the AP's in the case where service.The meaning of first notification message can have following several situations: 1) the first notification message For informing that the corresponding terminal device of the AP MAC Address is connect with the AP；2) the first notification message is for informing that the AP should The corresponding response instruction of MAC Address is set to the first value；3) the first notification message is for informing the corresponding terminal of the AP MAC Address Equipment is connect with the AP, and, inform that the corresponding response instruction of the MAC Address is set to the first value by the AP.

With reference to first aspect or any one into second of first aspect realizing of the first realization of first aspect, In the third realization of first aspect, after WLAN processing chip replys response frame to the terminal device further include:

The processor of the AP receives the second notification message of AP controller transmission, which includes the terminal The MAC Address of equipment；The processor sends the second instruction to WLAN processing chip according to second notification message；WLAN processing Chip removes response instruction corresponding with the MAC Address in response to second instruction in the response indicator register, alternatively, Response instruction corresponding with the MAC Address is set to second value in the response indicator register.

Here, second notification message is to determine to send in the case where connection by the AP with terminal device in the AP controller To the AP's.The meaning of second notification message can have following several situations: 1) second notification message is for informing the AP MAC The corresponding terminal device in address is disconnected with the AP；2) second notification message is for informing that the AP is removed and the MAC Address pair The response answered indicates or response instruction corresponding with the MAC Address is set to second value；3) second notification message is for informing this AP terminal device is disconnected with the AP, and informs that the AP removes corresponding with MAC Address response and indicates or will with the MAC The corresponding response instruction in location is set to second value.

The connection of AP and terminal device is managed and is controlled by AP controller, and AP controller can determine currently by which One AP is connect with terminal device, so that service is provided for terminal device, by making AP setting response instruction in time or removing Response instruction, the terminal device that may make AP to connect to each with the AP replys response frame, and does not connect with AP receiving Ignore in the case where the independent address frame that the terminal device connect is sent to the terminal device not connect with AP and replys response frame.

With reference to first aspect or any one into the third realization of first aspect of the first realization of first aspect, In the 4th kind of realization of first aspect, bitmap is preserved in the response indicator register, which includes multiple positions, multiple The corresponding multiple association identifications in position, each of multiple position position indicate response corresponding to the MAC Address of corresponding association identification The value of instruction, the WLAN are handled after the independent address frame that chip receiving terminal apparatus is sent further include:

The WLAN handle chip according to and the MAC Address corresponding association identification reading position corresponding with the association identification Value.

In the technical scheme, the value with each of bitmap to indicate response instruction corresponding with MAC Address, response The resource consumption of indicator register is small.

With reference to first aspect or the first realization of first aspect to the 4th kind of first aspect realize in any one, In the 5th kind of realization of first aspect, make when providing service by all AP of the AP controller management for any terminal device BSSID is target BSSID.

Second aspect provides a kind of AP, including processor and WLAN handle chip, and processor passes through with WLAN processing chip Bus connection, WLAN processing chip is for executing the process interacted with processor or terminal device that above-mentioned first aspect is related to In some or all of process；Processor handles chip or AP control for executing with WLAN involved in above-mentioned first aspect Process some or all of in the process of device interaction.

The third aspect provides another AP, which includes processing module, sending module and receiving module.AP passes through upper It states module and realizes some or all of first aspect method.

Detailed description of the invention

Fig. 1 is a kind of schematic diagram of the structure of central distribution formula framework provided in an embodiment of the present invention；

Fig. 2 is a kind of structural schematic diagram of implementation of AP provided in an embodiment of the present invention；

Fig. 3-Fig. 5 is scene signal of the terminal device provided in an embodiment of the present invention in the WLAN mobile several stages being related to Figure；

Fig. 6-Fig. 8 is that terminal device provided in an embodiment of the present invention shows in the process of the mobile frame response method being related to of WLAN It is intended to；

Fig. 9 is the structural schematic diagram of another kind AP provided in an embodiment of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention is described.

In current AP deployment scheme, WLAN is usually made of the AP that AP controller and AP controller are managed, such as Fig. 1 Shown, WLAN includes AP controller and at least two AP, which is used for as the terminal device in different zones Radio communication service is provided.

AP and AP controller can be respectively general AP and AP controller, or respectively distributed AP and center AP.

AP controller is for managing AP.For example, AP controller be wireless access point control with configuration protocol (English: Control And Provisioning of Wireless Access Points, CAPWAP) access controller in agreement (English: Access Controller, AC).

Center AP has the function of traditional AP (in addition to radio frequency part), and increases the function of part AP controller, such as Wireless terminal association control, the functions such as interior switching of AP controller.Also has the function of the centralized management to AP simultaneously.Center AP in addition to Outside with above-mentioned function, can also have the service quality (English: quality of service, QoS) of general AP, access Control the functions relevant to forwarding such as list (English: access control list, ACL).Center AP is in addition to above-mentioned function Can be outer, can also further have the function of gateway, as Network access control (English: network access control, NAC), dynamic host configuration protocol (English: Dynamic Host Configuration Protocol, DHCP) etc..

Distributed AP is one and is stripped out the radio-frequency module zoomed out from general AP.It is responsible for the blank-interface text of WLAN Processing, and communicated by cable network (such as Ethernet) with center AP.Between center AP and distributed AP can with direct communication, CAPWAP protocol communication can be passed through.The complete WLAN function of conventional wireless AP may be implemented in the combination of center AP and distributed AP Energy.When overlay area of the terminal device from the overlay area of an AP to another AP is mobile, terminal device can be at the two Switch between AP, during terminal device switches between two AP, packet loss can when in order to reduce terminal device switching Can, the frame that send the equal receiving terminal apparatus of two AP involved in the handoff procedure of terminal device, in addition, in order to Avoid two AP to terminal device reply response frame and cause response frame conflict, to make in two AP only have an AP to Terminal device replys response frame.

In AP, the decision process that AP replys response frame is completed by the WLAN processing chip of AP.In general WLAN processing In the reply mechanism of the response frame of chip, WLAN processing chip determines whether to reply response frame specifically: when WLAN handles chip When receiving independent address frame, WLAN processing chip reads the RA field in the independent address frame.The value of the RA field is BSSID.WLAN handles chip and the BSSID and WLAN is handled to the chip mask progress step-by-step saved in chip and operation to obtain First operation values.WLAN handles chip and the MAC Address of AP and the chip mask is carried out step-by-step and operation to obtain second and fortune Calculation value.First operation values are compared by WLAN processing chip with second operation values, if two values are identical, reply sound Answer frame.If two values are different, response frame is not replied.Wherein, before not being set, WLAN handles the chip mask of chip Default value (initial value can also be referred to as) be all positions be all 1.Since BSSID is considered as the MAC Address of AP, Yi Jixin Piece mask will carry out step-by-step and operation with BSSID and MAC Address, so the position of the MAC Address of BSSID, chip mask and AP Quantity is identical, for example, current MAC Address is 48, then BSSID, chip mask are 48.

Using the reply mechanism of the response frame of above-mentioned WLAN processing chip, have a kind of " BSSID follows me " (English: Follow Me BSSID) scheme can be used for the handoff procedure of terminal device.The program may be implemented in center AP and distribution In the distributed network architecture that formula AP is formed, it is situated between for forming as the distributed network structure of center AP and distributed AP below Continue the program.In this scenario, center AP is that each terminal device distributes an independent BSSID.Center AP is managed The independent BSSID is used when distributed AP provides service for terminal device.Switch in terminal device from a distributed AP During another distributed AP, when the distributed AP after switching provides service for terminal, previous point of switching can be simulated Cloth AP provides the BSSID used when service for terminal.The process is considered as BSSID and follows the movement of terminal device and move It is dynamic.

The distributed AP connected before the handover using AP1 by terminal device below, using AP2 as terminal device institute after handover The distributed AP of connection specifically introduces the handoff procedure of terminal device involved in the program.

In this scenario, the process that terminal device switches between AP1 and AP2 includes two stages:

First stage, terminal device do not switch to AP2 also.At this stage, center AP sends the first instruction to AP2. First instruction includes that mark and the center AP of terminal device are the BSSID of terminal device distribution, is used to indicate AP2 reception The data frame of the terminal device, and forbid AP2 to the terminal replies response frame.Therefore AP2 receives the terminal with listening mode sets The data frame that preparation is sent.One AP is referred to the data frame that listening mode receiving terminal apparatus is sent receives the terminal device When data frame, response frame is not replied.The AP1 data frame that receiving terminal apparatus is sent in a receiving mode.One AP is in a receiving mode When the data frame that receiving terminal apparatus is sent refers to the data frame for receiving terminal device transmission, response frame is replied.

Second stage, terminal device are switched to AP2.At this stage, center AP is switched to AP1, AP2 transmission respectively Function message.The handover success notification message includes the mark of terminal device, is used to indicate the data that AP1 stops receiving terminal apparatus Frame, and be used to indicate AP2 and reply response frame to terminal device.After AP1 receives the handover success message of center AP transmission, by Reception pattern is switched to listening mode or the not data frame of receiving terminal apparatus.AP2 is in the switching for receiving center AP transmission After success message, reception pattern is switched to by listening mode.

Since the reply mechanism of the response frame based on mask has been provided in WLAN processing chip, AP can configure chip and cover Code is into WLAN processing chip or removes the chip mask in WLAN processing chip to realize reception pattern and listening mode Switching.Therefore, the AP in the scheme of " BSSID follows me " can be realized using general WLAN processing chip, concrete principle It is as follows:

In the first phase, when terminal device is connect with AP1, center AP sends the BSSID distributed for terminal device To AP1 and indicate that chip mask is arranged in AP1, AP1 is arranged in the WLAN processing chip of AP1 according to the following steps according to the BSSID BSSID and chip mask.Step 10, which is sent to the WLAN processing chip of AP1 to indicate by the processor of AP1 WLAN handles chip and receives the WLAN frame that RA is the BSSID.Step 11, the processor of AP1 is by the MAC Address of the BSSID and AP1 Step-by-step XOR operation is carried out, third operation values are obtained.Step 12, the processor of AP1 determines the target in the third operation values for 1 Position, adds 1 for the reference number of the target position.Step 13, the processor of AP1 determines the chip mask of the WLAN processing chip of AP1, And the value of the target position according to the reference number setting chip mask of target position, to form new chip mask.Here, according to mesh The value of the target position of the reference number setting chip mask of mark specifically: if the reference number of target position is greater than 0, be arranged The value of target position is 0；If the reference number of target position is equal to 0, the value that target position is arranged is 1.Wherein, it be not set Before, all reference numbers that WLAN handles the chip mask of chip are 0.Step 14, the processor of AP1 is by the new core Piece mask is sent to the WLAN processing chip of AP1.Step 15, it is new to be updated to this by the WLAN processing chip of AP1 for chip mask Chip mask.

Specifically, the processor for being directed to AP1 determines the chip mask of the WLAN processing chip of AP1, specific implementation Can have: the processor of AP1 obtains the current chip mask of WLAN processing chip from the WLAN of AP1 processing chip, thus Determine the chip mask of WLAN processing chip；Alternatively, the processor of AP1 is true according to the chip mask currently saved in processor Determine the current chip mask of the WLAN processing chip of AP1.

In the first phase, after the processor of AP2 receives the first instruction, it is not provided with the corresponding chip mask of the BSSID, The BSSID is directly sent to the WLAN processing chip of AP2 to indicate that WLAN processing chip receives the WLAN that RA is the BSSID Frame.

In the first phase, center AP is preserved in the WLAN processing chip of the WLAN processing chip of AP1 and AP2 as eventually The BSSID of end equipment distribution.At the WLAN that the WLAN with the BSSID for data frame transfer to the AP1 of RA handles chip and AP2 When managing chip, the WLAN processing chip of AP1 and the WLAN processing chip of AP2 read the BSSID from the RA field of the data frame. Due to preserving the BSSID in the WLAN processing chip of AP1 and the WLAN processing chip of AP2, therefore the WLAN of AP1 handles chip The data frame is received with the WLAN processing chip of AP2.Since the WLAN processing chip of AP1 has updated chip according to the BSSID The WLAN processing chip of mask, the reply mechanism of the response frame based on aforementioned described WLAN processing chip, AP1 can be to terminal Device replied response frame.Since the chip mask in the WLAN processing chip of AP2 is covered not according to the BSSID chip updated Code, so not replying response frame to the terminal device when AP2 receives the data frame of terminal device transmission.

In second stage, AP2 is after receiving handover success message, according to the terminal device switched successfully in message Device identification determines its corresponding BSSID, is then covered by handling setting chip in chip in the WLAN of AP2 according to the BSSID Code is switched to reception pattern by listening mode to realize, the concrete mode of AP2 setting chip mask can refer to above-mentioned AP1 setting The mode of chip mask, details are not described herein again.

In second stage, after AP1 receives handover success message, according to the terminal device in the handover success message Device identification determines its corresponding BSSID, is then realized by removing the corresponding chip mask setting of the BSSID by reception mould Formula is switched to listening mode.Wherein, AP1 removes the corresponding chip mask setting of the BSSID specifically: step 21, the processing of AP1 The MAC Address of the BSSID and AP1 is carried out step-by-step XOR operation by device, obtains third operation values.Step 22, the processor of AP1 is true The target position for being 1 in the fixed third and operation values, subtracts 1 for the reference number of target position.Step 23, the processor of AP1 determines AP1 WLAN processing chip chip mask, and according to target position reference number setting chip mask target position value, with shape The chip mask of Cheng Xin, wherein foregoing description can refer to according to the value of the target position of reference number setting chip mask.Step The WLAN that the new chip mask is sent to AP1 is handled chip by 24, AP1 processor.Step 25, the WLAN of AP1 handles core Chip mask is set the new chip mask by piece.Further, it is set removing the corresponding chip mask of the BSSID Afterwards, the processor of AP1 sends an instruction or message to the WLAN of AP1 processing chip, and the WLAN processing chip of AP1 is in response to this Instruction or message, remove the BSSID.

In second stage, in the case where AP1 does not also remove the BSSID, the WLAN of AP1 processing chip and AP2's The BSSID is preserved in WLAN processing chip, when the WLAN with the BSSID for data frame transfer to the AP1 of RA handles chip When handling chip with the WLAN of AP2, the WLAN processing chip of AP1 and the WLAN processing chip of AP2 read from RA field and are somebody's turn to do BSSID, due to preserving the BSSID in the WLAN processing chip of AP1 and the WLAN processing chip of AP2, therefore at the WLAN of AP1 The WLAN of reason chip and AP2 processing chip receive the data frame.Since the WLAN processing chip of AP2 is updated according to the BSSID Chip mask, the reply mechanism of the response frame based on aforementioned described WLAN processing chip, the WLAN of AP2 handle chip meeting Response frame is replied to terminal device.Since AP1 is according to the center AP handover success message erasing sent the corresponding core of the BSSID Piece mask setting, so the WLAN processing chip of AP1 will not reply response frame to terminal device.AP1 remove the BSSID it Afterwards, with the BSSID for RA data frame transfer to AP1 WLAN handle chip when, due to AP1 WLAN processing chip there is no The BSSID, therefore the WLAN of AP1 processing chip does not receive the data frame.

Citing is below to be illustrated, it is assumed that the bit quantity of MAC Address, chip mask and BSSID is 8 (practical On should be 48, being reduced to 8 is in order to facilitate understanding).The MAC Address of AP1 is 11111111.The MAC Address of AP2 is 01111111.The chip mask of the WLAN processing chip of AP1 is 10111111 (as when terminal device is not connect with AP1 also There is a terminal device to connect with AP1, also, center AP is BSSID the case where being 10111111 of terminal device distribution). The chip mask of the WLAN processing chip of AP2 is 11111101 (as having there is a terminal when terminal device is not connect with AP2 also Equipment is connect with AP2, also, center AP is BSSID the case where being 01111101 of terminal device distribution).Assuming that center AP BSSID for terminal device distribution is 11111110.

In the first phase:

When terminal device is connect with AP1, center AP is sent to AP1 for 11111110, and the processor of AP1 receives 11111110 and be arranged chip mask instruction after, by 11111110 and 11111111 progress step-by-step XOR operation, obtain Operation values are 00000001；It is the 8th that the processor of AP1, which determines in 00000001 as 1 target position, and the processor of AP1 is by the 8th The reference number of position adds 1.The processor of AP1 determines the chip mask of the WLAN processing chip of AP1, is 1011111；Due to 8th value of the chip mask of the WLAN processing chip of AP1 is 1, then before the 8th reference number is added 1, the 8th Reference number be 0, then after the 8th reference number is added 1, the 8th reference number be 1,1 be greater than 0, so 8th value of the processor setting chip mask of AP1 is 0, and the new chip mask of formation is 10111110.The processing of AP1 The WLAN that 10111110 and 11111110 are sent to AP1 is handled chip by device.The WLAN processing chip of AP1 updates chip mask It is 10111110, and saves 11111110.

After the processor of AP2 receives the first instruction of center AP transmission, which includes BSSID, is The WLAN that 11111110 are sent to AP2 is handled chip by 11111110, AP2 processor, and the WLAN processing chip of AP2 saves 11111110。

When the WLAN of WLAN processing chip and AP2 that the data frame that terminal device is sent is transferred to AP1 handles chip, The RA field of the data frame is the BSSID that center AP is terminal device distribution, is 11111110.AP1 WLAN processing chip and The WLAN processing chip processing process of AP2 is as follows:

The result for the RA field that the WLAN processing chip of AP1 reads the data frame is 11111110, is handled with the WLAN of AP1 11111110 saved in chip are identical, and the WLAN processing chip of AP1 carries out step-by-step and operation for 11111110 and 10111110, Obtained operation values are 10111110.The WLAN processing chip of AP1 carries out step-by-step and operation for 11111111 and 10111110, obtains The operation values arrived are 10111110.Two values are identical, and the WLAN of AP1 handles chip and replys response frame to terminal device.

The result for the RA field that the WLAN processing chip of AP2 reads the data frame is 11111110, is handled with the WLAN of AP2 11111110 saved in chip are identical, and the WLAN processing chip of AP2 carries out step-by-step and operation for 11111110 and 11111101, Obtained operation values are 11111100.The WLAN processing chip of AP2 carries out step-by-step and operation for 01111111 and 11111101, obtains The operation values arrived are 01111101.Two values are different, and the WLAN processing chip of AP2 does not reply response frame to terminal device.

In second stage:

After the processor of AP2 receives the handover success message of center AP transmission, 11111110 and 01111111 is carried out Step-by-step XOR operation, obtained operation values are 10000001.It is the 1st that the processor of AP2, which determines in 10000001 as 1 target position, Position and the 8th, the reference number of the 1st and the 8th are added 1.The processor of AP2 determines the chip of the WLAN processing chip of AP2 Mask is 1111101；Since the 1st of chip mask of the WLAN processing chip of AP2 and the 8th value are 0, inciting somebody to action Before 1st and the 8th reference number adds 1, the 1st and the 8th reference number is 0, then by the 1st and the 8th After the reference number of position adds 1, the 1st and the 8th reference number is 1,1 greater than 0, so core is arranged in the processor of AP2 The 1st of piece mask and the 8th value is 0, and the new chip mask of formation is 01111100.The processor of AP2 will 01111100 is sent to the WLAN processing chip of AP2.Chip mask is updated to 01111100 by the WLAN processing chip of AP2.

After the handover success message for receiving center AP transmission, the processor of AP1 by 11111110 and 11111111 into Row step-by-step XOR operation, obtained operation values are 00000001.It is the 8th that the processor of AP1, which determines in 00000001 as 1 position, Position, subtracts 1 for the 8th reference number, since in the first phase, the 8th reference number is 1, then after subtracting 1, the 8th The reference number of position is 0.The processor of AP1 determines the chip mask of the WLAN processing chip of AP1, is 10111110, due to the 8th 8th value of the processor setting chip mask that the reference number of position is 0, AP1 is 0, and the chip mask of formation is 10111111.The WLAN that 10111111 are sent to AP1 is handled chip by the processor of AP1.The WLAN of AP1 handles chip for chip Mask is set as 10111111.

When the WLAN of WLAN processing chip and AP2 that the data frame that terminal device is sent is transferred to AP1 handles chip, The RA field of the data frame is the BSSID that center AP is terminal device distribution, and the WLAN which is 11111110, AP1 is handled It is as follows that the WLAN of chip and AP2 handle chip processing process:

The result for the RA field that the WLAN processing chip of AP1 reads the data frame is 11111110, is handled with the WLAN of AP1 11111110 saved in chip are identical, and the WLAN processing chip 11111110 and 10111111 of AP1 carries out step-by-step and operation, obtain The operation values arrived are 10111110；The WLAN processing chip of AP1 carries out step-by-step and fortune for the 11111111 of AP1 and 10111111 It calculates, obtained operation values are 10111111；Two values are different, and the WLAN processing chip of AP1 does not reply response frame to terminal device.

After the WLAN processing chip of AP1 removes 11111110, the WLAN processing chip of AP1 reads the data frame Being not present in the WLAN processing chip that the result of RA field is 11111110, AP 1 is 11111110 BSSID, AP's 1 WLAN processing chip does not receive the data frame.

The WLAN processing chip of AP2 carries out step-by-step for 11111110 and 01111100 and operation, obtained operation values are 01111100；The WLAN processing chip of AP2 carries out step-by-step for 01111111 and 01111100 and operation, obtained operation values are 01111100.Two values are identical, and the WLAN of AP2 handles chip and replys response frame to terminal device.

In the above scheme, based on WLAN processing chip response frame reply mechanism, AP WLAN processing chip according to The value of RA field in data frame determines whether the data frame that receiving terminal apparatus is sent, and according to the RA field in data frame Value decide whether reply response frame, the value of the RA field be AP controller be terminal device distribution BSSID, i.e. WLAN processing Chip according to BSSID complete to whether receiving terminal apparatus send frame and reply response frame judgement.If BSSID's sets Meter scheme is following scheme, the reply mechanism of the response frame based on above-mentioned WLAN processing chip and WLAN processing chip, meeting Cause response frame conflict.

Scheme one, AP controller are that multiple terminal devices distribute identical BSSID, this multiple terminal devices shares BSSID, Each AP of AP controller management provides for this multiple terminal devices to be shared using this by multiple terminal devices when service BSSID。

Scheme two, AP controller are that the terminal device of the WLAN where all access AP controllers distributes identical BSSID, All AP of AP controller management use the identical BSSID when providing service for any terminal device.

Since multiple terminal devices share BSSID, the RA for the data frame that multiple terminal devices are sent is the BSSID, and one A BSSID corresponds to multiple terminal devices, and multiple data frames with the BSSID for RA may not be what single terminal equipment was sent. Transmission may connect with AP with the BSSID for the terminal device of the data frame of RA, so AP WLAN handle chip according to BSSID decides whether that replying response frame not can guarantee AP only to the terminal device reply response frame connecting with AP.For example, AP is controlled The BSSID that device is terminal device 1, terminal device 2 distributes is BSSID1, and terminal device 1 is connect with aforementioned AP1, terminal device 2 It is connect with aforementioned AP2, by foregoing teachings it is found that chip mask can be arranged according to BSSID1 in AP1；AP2 can also be set according to BSSID1 Set chip mask.The RA for the data frame that terminal device 1 and terminal device 2 are sent is the BSSID1.It is sent when terminal device 1 When the WLAN of data frame transfer to AP2 handle chip, the BSSID set in chip is handled according to the WLAN of AP2, AP2's WLAN processing chip receives the data frame, and the chip mask being arranged in chip, the WLAN processing of AP2 are handled according to the WLAN of AP2 Chip replys response frame, i.e. AP2 has replied response frame to the terminal device 1 not connecting with AP2.Multiple AP are replied to terminal device Response frame causes response frame conflict.

Therefore, the embodiment of the present invention provides the reply mechanism of a kind of new WLAN processing chip and corresponding response frame, To meet the design scheme in BSSID as under the design scheme of aforementioned schemes one, scheme two or a kind of any other BSSID, When receiving the frame of terminal device transmission, AP only replys response frame to the terminal device connecting with the AP.

In the embodiment of the present invention, terminal device is connect with AP refers to that terminal device is in the overlay area of the AP, also, by AP provides service for terminal device.AP provides service by terminal device and refers to that by the AP be business that the terminal device currently carries out It provides and supports, specifically can include: the uplink message and the processing forward uplink message that AP receiving terminal apparatus is sent are controlled to AP Device, and, the downlink message that AP controller is sent to terminal device and the processing forward downlink message are received to terminal device etc..

The embodiment of the present invention is suitable for the above-mentioned network architecture as shown in Figure 1, is applicable to enable to appointing in WLAN Two adjacent AP that anticipate for terminal device provide service using the design scheme of identical BSSID, which can be with For two AP involved in the handoff procedure in terminal device.Wherein, the design scheme of BSSID can be aforementioned Follow Design scheme in Me BSSID, or the design scheme in aforementioned schemes one, or setting in aforementioned schemes two Meter scheme, the AP that can also enable to any two in WLAN adjacent for other are provided for terminal device and are serviced using identical BSSID design scheme, the embodiment of the present invention is with no restrictions.Wherein, terminal device is that arbitrarily have WLAN website (STA) function Equipment, such as mobile phone, smart phone, computer, tablet computer, personal digital assistant, mobile internet device (, can Wearable device and E-book reader etc..

A kind of implementation of AP provided in an embodiment of the present invention is introduced first, which includes a kind of with new construction WLAN handles chip.Chip is handled compared to general WLAN, WLAN processing chip includes at least one response instruction deposit Device.The response indicator register is for storing one or more response instructions, with the connection of instruction terminal equipment and the AP, Wherein, in the case where the response is designated as the first value, indicate that the corresponding terminal device of response instruction is connect with the AP.It should WLAN processing chip can also be referred to as WIFI chip；If WLAN handles chip and radio frequency (English: radio Frequency, RF) circuit integration on one chip, the WLAN processing chip can also be referred to as radio frequency chip.Some In possible embodiment, if the WLAN handles integrated chip in the processor of AP, WLAN handles chip and the processor It is connected by chip interior bus and is based on chip interior bus protocol and communicated, for example, processor is advanced reduced instruction Collect the chip of machine (English: Advanced RISC Machine, ARM) framework, then processor and WLAN processing chip pass through elder generation It connects into high performance bus (English: Advanced High-Performance Bus, AHB) and is carried out based on ahb bus agreement Communication.In other possible embodiments, if the processor of WLAN processing chip and AP are two mutually independent devices Part, then the WLAN handles chip and is connect with the processor by chip exterior bus and be based on chip exterior bus protocol and led to Letter.Such as the chip exterior bus be peripheral component interconnection (English: Peripheral Component Interconnect, PCI) bus.

Fig. 2 is a kind of structural schematic diagram of implementation of AP10 provided in an embodiment of the present invention, wherein Fig. 2 shows It is that WLAN handles the case where chip and processor are two mutually independent devices, as shown in Fig. 2, AP10 can include: processor 110, communication component 120, memory 130 (one or more computer readable storage mediums) and any other similar or suitable Component, these components can communicate on one or more communication bus 140.

Processor 110 can be received by bus 140 from above-mentioned other component (such as communication component 120, memory 130) Order carries out calculating or data processing according to the order received.Communication component 120 can control AP and another communication equipment Between communication connection, which can be AP controller, or terminal device.Communication component 120 can be with Including the interface (such as Ethernet interface) for AP10 to be connected to AP controller.Communication component 120 can be by using radio frequency Come and terminal equipment in communication.Communication component 120 may include radio circuit 121, WLAN processing chip 122, wherein WLAN processing Chip 122 includes response indicator register；Radio circuit 121 can be used for data transmission and reception, and radio circuit 121 can wrap Include transceiver, power amplifier, frequency filter, low noise amplifier etc..Radio circuit 121 can also include in channel radio The component of electromagnetic wave is sent and received when letter in free space, for example, conductor, conducting wire etc..In some possible embodiments, WLAN processing chip 122 and radio circuit 121 can be integrated in chip piece.Memory 130 can store from processing Device 110 or other component (such as communication component 120) received order or data.Memory 130 is coupled with processor 110, is used for Store various software programs and/or multiple groups instruction.Memory 130 can store an operating system.In the specific implementation, memory 130 It may include the memory of high random access, and may also comprise nonvolatile memory, such as one or more disk storages Equipment, flash memory device or other non-volatile solid-state memory devices.

Based on the AP10 of 2 embodiment of earlier figures description, the frame response method of the embodiment of the present invention may be implemented.Below by way of The scene moved in a wlan in conjunction with terminal device introduces the frame response method of the embodiment of the present invention.

The process that terminal device moves in a wlan can be considered as the sequential combination of multiple target moving process.Wherein, mesh Mark moving process refers to the process that terminal device moves in the overlay area of two adjacent AP, i.e. terminal device is from previous AP Overlay area be moved to the latter AP overlay area process.Wherein, the overlay area of the previous AP and the latter The overlay area of AP is there are overlapping region, the neighbor AP of the previous AP and the latter AP other side each other.Due to terminal device The process involved in each target moving process is identical, and therefore, the embodiment of the present invention is with one of target moving process Example introduces frame response method when terminal device moves in a wlan.

In the embodiment of the present invention, using identical when the previous AP and the latter AP provides service for terminal device BSSID, the BSSID are target BSSID.Wherein, target BSSID enables to WLAN based on mentioned above for AP controller In the adjacent AP of any two provide service for terminal device and use any one side in the design scheme of identical BSSID Case is the BSSID of terminal device distribution.For example, target BSSID can be side of the AP controller based on Follow Me BSSID Case is the independent BSSID of terminal device distribution, and target BSSID follows the movement of terminal device and moves；Target BSSID Or AP controller based on above scheme one be including the terminal device multiple terminal devices distribution BSSID, All AP of AP controller management provide service using target BSSID for multiple terminal device；Target BSSID may be used also Think AP controller based on above scheme two be access the AP controller where WLAN terminal device distribution BSSID, AP All AP of controller management provide service using target BSSID for any one terminal device.

Here, if target BSSID is AP controller, the scheme based on Follow Me BSSID is what terminal device distributed Independent BSSID, alternatively, target BSSID is AP controller based on the BSSID that above scheme one is that terminal device distributes, AP control Target BSSID can be assigned to terminal device after the terminal device is connect with the first AP by device processed, and the first AP refers to terminal device Access first AP of the WLAN connection where AP controller.If target BSSID be AP controller be based on above scheme two be Terminal device distributes BSSID, and AP controller can be before any terminal device accesses the WLAN where the AP controller, by this The BSSID of all AP in WLAN is configured to target BSSID.

Target moving process specifically can be related to following several stages:

Stage one, terminal device are in the overlay area of previous AP, not in the overlay area of the latter AP, specifically such as Shown in Fig. 3, AP3 is previous AP, and AP4 is the latter AP, and terminal device is only in the overlay area of AP3.

Stage two, terminal device in the overlapping region of the overlay area of previous AP and the overlay area of the latter AP, Specific AP4 is the latter AP as shown in figure 4, AP3 is previous AP, and terminal device is not only in the overlay area of AP3, but also in AP4 Overlay area in.

Stage three, terminal device are in the overlay area of the latter AP, not in the overlay area of previous AP, specifically such as Shown in Fig. 5, AP3 is previous AP, and AP4 is the latter AP, and terminal device is only in the overlay area of AP4.

The frame response method in above-mentioned stage one to the stage three is introduced separately below.Indicate that this is previous with AP3 below AP indicates the latter AP with AP4.Referring to Fig. 6-Fig. 8.

In the embodiment of the present invention, the RA for the independent address frame that terminal device is sent is target BSSID, i.e., sends out in terminal device In the independent address frame sent, the value of RA field is target BSSID；The TA for the independent address frame that terminal device is sent is terminal device MAC Address, i.e., in the independent address frame that terminal device is sent, the value of TA field is the MAC Address of terminal device.

In the embodiment of the present invention, independent address frame include data frame or request send (English: request to send, RTS) the non-managements frame such as frame.

It is the flow diagram of the frame response method provided in an embodiment of the present invention in the stage one referring to Fig. 6, Fig. 6.? In stage one, due to terminal device in the overlay area of AP3 without in the overlay area of AP4, list that terminal device is sent Only address frame can be received by AP3, can't be received by the AP4.Stage one can specifically be divided into two small stages, small rank Duan Yi: terminal device is not connect with AP3；The small stage two: terminal device is connect with AP3, provides service by AP3 for terminal device, Wherein, if connect to provide service for terminal device and determined by AP controller with terminal device by AP3.

S201, before terminal device is connect with AP3, terminal device sends independent address frame, and the TA of independent address frame is The MAC Address of terminal device.

S203, when determining that AP controller sends the first notification message to AP3 when being connect by AP3 with terminal device, first is logical Know that message includes the MAC Address of terminal device.

In the embodiment of the present invention, the first notification message is for making the 2nd AP will be in the response indicator register of the 2nd AP The corresponding response instruction of the MAC Address of the terminal device is set to the first value, to indicate that terminal device is currently connect with the 2nd AP. The concrete meaning of first notification message can be these types of situation: 1, the first notification message be used to indicate terminal device currently with this 2nd AP connection；2, the first notification message is used to indicate the 2nd AP and will set with the terminal in the response indicator register of the 2nd AP The corresponding response instruction of standby MAC Address is set to the first value；3, the first notification message is used to indicate terminal device currently with second AP connection, and indicate the 2nd AP in the response indicator register of the 2nd AP by sound corresponding with the MAC Address of the terminal device It should indicate to be set to the first value.Wherein, the 2nd AP refers to the recipient of the first notification message, that is, receives the AP of first notification message.

In step S203, AP3 is the 2nd AP.Specifically, AP controller can be incited somebody to action by the network interface connecting with AP3 First notification message is sent to AP3.

Here, if target BSSID is AP controller, the scheme based on Follow Me BSSID is what terminal device distributed Independent BSSID, alternatively, target BSSID is AP controller based on above scheme one be terminal device distribution BSSID, this One notification message may also include target BSSID.

Optionally, target BSSID can also be sent to the AP3, example before sending the first notification message by AP controller Such as, AP3 is not the first AP, and target BSSID can be sent to this when terminal device is connect with the first AP by AP controller AP3；For another example, target BSSID is AP controller based on the BSSID that above scheme two is that terminal device distributes, and AP controller is in office One terminal device accesses before the WLAN where the AP controller, which is sent to AP3.Specifically, AP controller passes through Target BSSID is sent to AP3 by the broadcast message in WLAN.Target BSSID is sent to before sending the first notification message AP3 can make AP3 before terminal device is connect with AP3, and the WLAN frame that energy receiving terminal apparatus is sent, which can Think the independent address frame.

Here, target BSSID is stored in the WLAN processing chip of AP3 by AP3 after receiving target BSSID.

The processor of S204, AP3 receive first notification message.

After receiving first notification message, AP3 executes following steps:

The processor of S205, AP3 send the first instruction to the WLAN of AP3 processing chip according to the first notification message.

The WLAN processing chip of S206, AP3 are in response to the first instruction, in the response instruction of the WLAN processor chips of AP3 Response corresponding with the MAC Address of terminal device instruction is set to the first value in register.

In a kind of concrete implementation mode, the response indicator register of AP can save response by way of bitmap and refer to Show, which includes multiple positions, and each of bitmap position indicates the value of its corresponding response instruction, i.e. each position of bitmap can It is used as response instruction to be assigned, the value of this is the value of its response instruction being used as.

For example, such as the bitmap in the response indicator register of AP shares 8 positions, is specially 10111011, In, preceding 3 positions in 8 positions, which are assigned, is used as 3 response instructions, then know that the value of the corresponding response instruction in the 1st position is 1, The value of the corresponding response instruction in 2nd position is that the value of the corresponding response instruction in the 0, the 3rd position is 0.

It, can be by establishing the intermediate corresponding relationship identified with the MAC Address of terminal device, to build in the embodiment of the present invention The MAC Address of vertical terminal device and the corresponding relationship of response instruction.In the case where saving response instruction by way of bitmap, For AP in independent address frame of the MAC Address with terminal device for receiving terminal device transmission for TA, the WLAN of AP handles core Piece according to and the corresponding intermediate mark of MAC Address of terminal device read the value of position corresponding with centre mark, determined For the value of response instruction corresponding with the MAC Address of terminal device.For example, sharing 8 positions in bitmap, then intermediate mark can be 1~8, it is respectively used to the 1st position~8th position in instruction bitmap, centre mark 1 is corresponding with the MAC Address of terminal device Can be corresponding with the MAC Address of terminal device by the 1st position, it is receiving with the MAC Address of the terminal device as the independent of TA When address frame, AP reads the value of 1 corresponding position (the 1st position) of intermediate mark as sound corresponding with the MAC Address of terminal device The value that should be indicated.

Specifically, in the case where saving response instruction by way of bitmap, it will be corresponding with the MAC Address of terminal device Response instruction be set to the first value are as follows: the value of the corresponding position of intermediate mark corresponding with the MAC Address of terminal device is set to First value.For example, centre corresponding with the MAC Address of terminal device is identified as 2, then it is corresponding the centre in bitmap to be identified as 2 The value of position (the 2nd position) be set to the first value.

In the embodiment of the present invention, intermediate mark corresponding with the MAC Address of terminal device can have following situations:

1, AP is specified by AP controller and informed to intermediate mark corresponding with the MAC Address of terminal device, for example, intermediate mark Knowing is association identification.

AP controller can specify a certain intermediate mark as the MAC with terminal device when terminal device accesses WLAN The corresponding intermediate mark in location, then informs AP.Wherein, AP controller can specify a certain intermediate mark as with terminal device The corresponding intermediate mark of MAC Address after, inform that all AP of AP controller management should be set with terminal by way of broadcast The corresponding intermediate mark of standby MAC Address, so that all AP can determine centre corresponding with the MAC Address of terminal device Mark, and then all AP can pass through intermediate mark determining MAC with terminal device corresponding with the MAC Address of terminal device The corresponding response instruction in address；AP controller can also identify among a certain as the MAC Address pair with terminal device specifying After the intermediate mark answered, when determining that terminal device is connected to a certain AP, inform that the AP is somebody's turn to do the MAC Address pair with terminal device The intermediate mark answered, so the AP can according to the MAC Address with terminal device it is corresponding it is intermediate identify, determination is set with terminal The corresponding response instruction of standby MAC Address.

In such situation, as long as terminal device currently also accesses in a wlan, no matter terminal device currently whether with AP It connects, preserves response instruction corresponding with the MAC Address of terminal device in the response indicator register of AP always.It is set in terminal Response corresponding with the MAC Address of terminal device instruction in the case where not connect with AP, in the response indicator register of AP For second value.

2, intermediate mark corresponding with the MAC Address of terminal device is voluntarily distributed by AP.

The corresponding intermediate mark of the MAC Address with terminal device can be AP after determining that terminal device is connect with AP, Select one of them as intermediate mark corresponding with the MAC Address of terminal device according in current assignable intermediate mark by AP I.e. determining respond corresponding with the MAC Address of terminal device of mark refers among the MAC Address of knowledge, determination and terminal device is corresponding Show.

In such situation, after the case where terminal device switches to other AP, AP can be by deleting terminal device MAC Address and the corresponding relationship for being somebody's turn to do intermediate mark corresponding with the MAC Address of terminal device, to release this and terminal device Corresponding relationship between the corresponding response instruction of MAC Address and the MAC Address of terminal device.

For example, AP is corresponding with the MAC Address of terminal device by centre mark 2, then the 2nd position of bitmap is used as and end The corresponding response instruction of the MAC Address of end equipment, after terminal device switches to other AP, AP deletes intermediate mark 2 and terminal The corresponding relationship of the MAC Address of equipment, at this point, the 2nd position of bitmap is not used as sound corresponding with the MAC Address of terminal device It should indicate.

In such situation, in the case where terminal device is not connect with AP, lack in the response indicator register of AP with The corresponding response instruction of the MAC Address of terminal device.

In the case where saving response instruction by way of bitmap, step S205~S206 is specific can include: the place of AP3 It manages device and the first instruction is sent to the WLAN of AP3 processing chip according to the first notification message, the first instruction includes and terminal device The corresponding intermediate mark of MAC Address, is somebody's turn to do to identify can be among corresponding with the MAC Address of terminal device and be specified by AP controller , it is also possible to voluntarily to be distributed by the processor of AP3；The WLAN processing chip of AP3 is according to the MAC Address pair with terminal device The intermediate value for identifying corresponding position corresponding with the MAC Address of terminal device is set to the first value by the intermediate mark answered.Wherein, One value can be 1, or 0.

S203~S206 through the above steps, so that providing service by AP3 for terminal device, i.e., so that AP3 is set with terminal Standby connection.After terminal device is connect with AP3, preserved in the response indicator register of the WLAN of AP3 processing chip and terminal The corresponding response instruction of the MAC Address of equipment, also, corresponding with the MAC Address of terminal device should respond and be designated as the first value.

The opportunity that AP3 can be sent to by AP controller due to target BSSID, there are many situations, were directed to step S201's Independent address frame, the method that AP3 is executed are different.

Target BSSID is sent to AP3 before sending the first notification message by the first situation, AP controller.

In the first scenario, before terminal device is connect with AP3, in the WLAN processing chip of terminal device AP3 It has been saved target BSSID, therefore, the independent address frame that the WLAN processing chip receiving terminal apparatus of AP3 is sent.

In addition, by foregoing teachings it is found that lacking in the response indicator register of AP3 before terminal device is connect with AP3 Response instruction corresponding with the MAC Address of terminal device, alternatively, in the response indicator register of AP3 with the MAC of terminal device The corresponding response in location is designated as second value, so, the WLAN of the independent address frame being directed in step S201, AP3 handles chip Execute following steps:

The WLAN processing chip of S202, AP3 receive independent address frame, and the WLAN processing chip of AP3 is not returned to terminal device Complex response frame.

Here, the WLAN processing chip of AP3 executes the specific logic of step S202 are as follows: the WLAN processing chip of AP3 is read The RA field of the independent address frame, the value of RA field are target BSSID, the target saved in the WLAN processing chip equal to AP3 The WLAN processing chip of BSSID, AP3 receive the independent address frame.The WLAN processing chip of AP3 reads the TA of the independent address frame Field, the value of TA field are the MAC Address of terminal device, and the WLAN processing chip of AP3 is determined according to the MAC Address of terminal device Lack in the response indicator register of the WLAN processing chip of AP3 corresponding with the MAC Address of terminal device response indicate or with The corresponding response of the MAC Address of terminal device is designated as second value, and the WLAN processing chip of AP3 is not replied to terminal device to be responded Frame.

Second situation, AP controller are carrying target BSSID into the first notification message that AP3 is sent.

In the latter case, it before terminal device is connect with AP3, is not preserved also in the WLAN processing chip of AP3 Target BSSID, therefore, the WLAN processing chip independent address frame that receiving terminal apparatus is not sent of AP3 is directed to step The WLAN processing chip of the independent address frame of S201, AP3 skips above-mentioned steps S202, not the independent address of receiving step S201 Frame.

S207, after AP3 is connect with terminal device, terminal device sends independent address frame, and the TA of independent address frame is The MAC Address of terminal device.

After terminal device is connect with AP3, the WLAN of AP3 is handled and is preserved target BSSID in chip, therefore AP3 WLAN handles the independent address frame that chip receiving terminal apparatus is sent.Response in the processing chip of the WLAN of AP3 indicates deposit Response instruction corresponding with the MAC Address of terminal device is preserved in device, also, the response is designated as the first value.

The WLAN processing chip of AP3 executes following steps:

The independent address frame that the WLAN processing chip receiving terminal apparatus of S208, AP3 are sent.

The WLAN of S209, AP3 handle chip and reply response frame to terminal device.

Here, the WLAN processing chip of AP3 executes the specific logic of step S208~209 are as follows: the WLAN of AP3 handles chip The RA field of the independent address frame is read, the value of RA field is target BSSID, is saved in the WLAN processing chip equal to AP3 The WLAN processing chip of target BSSID, AP3 receive the independent address frame.The WLAN processing chip of AP3 reads the independent address frame TA field, the value of TA field is the MAC Address of terminal device, and the WLAN processing chip of AP3 determines the WLAN processing chip of AP3 Response indicator register in response corresponding with the MAC Address of terminal device be designated as the first value, the WLAN of AP3 handles chip Response frame is replied to terminal device.

Specifically, the MAC Address of terminal device is filled in the RA field into response frame by the WLAN processing chip of AP3, will Response frame is sent to terminal device.

In the embodiment of the present invention, response frame refers to the response to independent address frame, response frame include confirmation (English: Acknowledgement, ACK) frame or allow to send frame (English: clear to send, CTS) frame.Wherein, in independent address In the case that frame is data frame, which is ACK frame, is used to indicate and is properly received the data frame；It is RTS in independent address frame In the case where frame, which is CTS frame.

The step of AP3 is executed in embodiment as shown in Figure 6 is it is found that the WLAN processing chip of AP is receiving terminal device When the independent address frame sent, TA is read from independent address frame, TA is the MAC Address of terminal device, if the response of AP refers to Show that response corresponding with the MAC Address of the terminal device is designated as the first value in register, the WLAN processing chip of AP, which is replied, to be rung Frame is answered, otherwise, the WLAN of AP processing chip does not reply response frame, i.e. AP is completed according to the MAC Address of terminal device to whether returning The judgement of complex response frame.Regardless of being the independent address frame of TA with the MAC Address of terminal device in which kind of BSSID design scheme It must be that MAC Address sends for the terminal device of the MAC Address of the terminal device, and is unlikely to be the transmission of other terminal devices , the WLAN of AP processing chip according to the MAC Address of terminal device decide whether to reply response frame can guarantee AP only to AP The terminal device of connection replys response frame, and the applicability of the technical solution of the embodiment of the present invention is wide.

It is the flow diagram of the frame response method provided in an embodiment of the present invention in the stage two referring to Fig. 7, Fig. 7.

Coincidence in the stage two, due to terminal device in the overlay area of previous AP and the overlay area of the latter AP In region, therefore terminal device can be received in the independent address frame that the stage two sends by AP3 and AP4.

S301, terminal device send independent address frame, and the TA of independent address frame is the MAC Address of terminal device.

Since terminal device is connect with AP3, by the embodiment of earlier figures 6 it is found that being saved in the response indicator register of AP3 There is response corresponding with the MAC Address of terminal device to indicate, also, the response is designated as the first value, the WLAN of AP3 handles chip Execute following steps:

The independent address frame that the WLAN processing chip receiving terminal apparatus of S302, AP3 are sent.

The WLAN of S303, AP3 handle chip and reply response frame to terminal device.

Here, the specific logic that the WLAN processing chip of AP3 executes step S302~S303 can refer to step S208~209 Specific logic, repeat no more.

Terminal device is not connect with AP4, with reference to terminal device in the corresponding embodiment of earlier figures 6 not and the case where AP3, Lack response instruction corresponding with the MAC Address of terminal device in the response indicator register of AP4, alternatively, the response of AP4 indicates Response corresponding with the MAC Address of terminal device is designated as second value in register, for the independent address frame of step S301, The WLAN processing chip of AP4 executes following steps:

The independent address frame that the WLAN processing chip receiving terminal apparatus of S304, AP4 are sent, the WLAN of AP4 handle chip Response frame is not replied to terminal device.

Here, the WLAN processing chip that the specific logic that the WLAN processing chip of AP4 executes step S304 can refer to AP3 is held The specific logic of row step S202, repeats no more.

In the case where alternatively possible, if AP controller is carrying target into the first notification message that AP4 is sent BSSID, then the WLAN processing chip of AP4 does not preserve target BSSID before terminal device is connect with AP4, therefore, The WLAN processing chip independent address frame that receiving terminal apparatus is not sent of AP4, that is, be directed to the independent address frame of step S301, The WLAN processing chip of AP4 skips above-mentioned steps S304.

For the possibility for reducing the independent address frame loss that terminal device is sent, AP controller can send the first notification message Target BSSID is sent to AP4 before, so that the independent address that the equal receiving terminal apparatus of AP3 and AP4 is sent in the stage two Frame.

S305, AP controller switch over judgement to terminal device, and when terminal device meets switching condition, determine eventually End equipment is connected to AP4 from AP3 switching.

S306, AP controller send the first notification message to AP4, and the first notification message includes the MAC Address of terminal device.

After receiving first notification message, AP4 executes following steps:

The processor of S307, AP4 send the first instruction to the WLAN of AP4 processing chip according to the first notification message.

The WLAN processing chip of S308, AP4 are in response to the first instruction, in the response instruction of the WLAN processor chips of AP4 Response instruction corresponding with MAC Address is set to the first value in register.

In step S306~S308, AP4 is the 2nd AP of foregoing description, before the concrete meaning reference of the first notification message The description of step S203 is stated, the specific implementation of step S306~S308 can refer to the specific reality of abovementioned steps S203~S206 Existing mode, repeats no more.

Further, AP4 can also execute step S309 executing the step S308.

S309, AP4 send the corresponding response message of the first notification message to AP controller, indicate to the first notification message Response.

It is corresponding with the first notification message in the embodiment of the present invention, the corresponding response message of the first notification message it is specific Meaning can have following several situations: 1, the response message be used to indicate terminal device currently succeed connect with the 2nd AP；2, should Response message is used to indicate the 2nd AP in the response indicator register of the 2nd AP successfully by the MAC Address pair with the terminal device The response instruction answered is set to the first value；3, the response message is used to indicate terminal device and currently succeeds connect with the 2nd AP, and refers to Show that the 2nd AP successfully sets response corresponding with the MAC Address of terminal device instruction in the response indicator register of the 2nd AP For the first value.

Specifically, response corresponding with the MAC Address of terminal device instruction is being set to first by the WLAN processing chip of AP4 After value, the WLAN of AP4 handles chip and sends success response to the processor of AP4, and the processor of AP4 sends first to AP controller The corresponding response message of notification message.

S310, AP controller send second notification message to AP3, and second notification message includes the MAC Address of terminal device.

In the embodiment of the present invention, second notification message is for removing the 3rd AP in the response indicator register of the 3rd AP And response corresponding with the MAC Address of terminal device is indicated to be set to the by the MAC Address of terminal device corresponding response instruction Two-value.The concrete meaning of second notification message can have these types of situation: 1, second notification message is used to indicate terminal device and works as It is preceding to be disconnected with the 3rd AP；2, second notification message is used to indicate the 3rd AP and removes in the response indicator register of the 3rd AP And response corresponding with the MAC Address of terminal device is indicated to be set to the by the MAC Address of terminal device corresponding response instruction Two-value；3, the first notification message is used to indicate terminal device and currently disconnects with the 3rd AP, and indicates the 3rd AP in the 3rd AP Response indicator register in remove corresponding with the MAC Address of terminal device response and indicate or by the MAC with terminal device The corresponding response instruction in location is set to second value.Wherein, the 3rd AP refers to the recipient of second notification message, that is, receives second notice The AP of message.

In step s310, AP3 is the 3rd AP.

After receiving the second notification message, AP3 executes following steps:

The processor of S311, AP3 send the second instruction to the WLAN of AP3 processing chip according to second notification message.

The WLAN processing chip of S312, AP3 are in response to the second instruction, in the response instruction of the WLAN processor chips of AP3 Response corresponding with the MAC Address of terminal device is removed in register to indicate or by sound corresponding with the MAC Address of terminal device It should indicate to be set to second value.

Here, by the embodiment of earlier figures 6 it is found that there are two types of feelings for mark among corresponding with the MAC Address of terminal device Condition, if it is the 1st kind of situation, in the case where terminal device is not connect with AP3, as long as terminal device also accesses in a wlan, Response instruction corresponding with the MAC Address of terminal device, therefore, AP3's are preserved in the response indicator register of AP3 always WLAN handles chip will be corresponding with the MAC Address of terminal device in the response indicator register of the WLAN processor chips of AP3 Response instruction be set to second value；If it is the 2nd kind of situation, in the case where terminal device is not connect with AP3, the response of AP3 Lack response instruction corresponding with the MAC Address of terminal device in indicator, therefore, for the response indicator register for making AP3 In lack corresponding with the MAC Address of terminal device response instruction, the WLAN processor core of the WLAN processing chip of AP3 in AP3 Response instruction corresponding with the MAC Address of terminal device is removed in the response indicator register of piece.

Specifically, step S311~S312 is specific in the case where saving response instruction by way of bitmap can include: The processor of AP3 sends the second instruction to the WLAN of AP3 processing chip according to second notification message, and the second instruction includes and terminal The corresponding intermediate mark of the MAC Address of equipment, being somebody's turn to do intermediate mark corresponding with the MAC Address of terminal device is referred to by AP controller Fixed；The WLAN processing chip of AP3 is identified according to centre corresponding with the MAC Address of terminal device by the MAC with terminal device The corresponding intermediate value for identifying corresponding position in address is set to second value.Alternatively, the processor of AP3 according to second notification message to The WLAN processing chip of AP3 sends the second instruction, and the second instruction includes intermediate mark corresponding with the MAC Address of terminal device, The corresponding intermediate mark of the MAC Address with terminal device is voluntarily distributed by the processor of AP3, and the WLAN of AP3 handles core Piece removes intermediate mark corresponding with the MAC Address of terminal device, is referred to removing response corresponding with the MAC Address of terminal device Show.

Optionally, second notification message may be used to indicate that AP3 deletes target BSSID, such as target BSSID is base In the independent BSSID that the scheme of Follow Me BSSID is terminal device distribution, then after terminal device is connect with AP4, AP Controller can indicate that AP3 deletes target BSSID by second notification message.AP controller can also be referred to by other message Show that AP3 deletes target BSSID.

By step S305~S312, terminal device disconnects the connection with AP3, is switched to and connect with AP4.

S313, terminal device send independent address frame, and the TA of independent address frame is the MAC Address of terminal device.

The corresponding response instruction of MAC Address of the terminal device is preserved in the response indicator register of AP4, also, should Response is designated as the first value, and therefore, the WLAN processing chip of AP4 executes following steps:

The independent address frame that the WLAN processing chip receiving terminal apparatus of S314, AP4 are sent.

The WLAN of S315, AP4 handle chip and reply response frame to terminal device.

Here, the specific logic that the WLAN processing chip of AP4 executes step S314~S315 can refer to the WLAN processing of AP3 Chip executes the specific logic of step S208~S209, repeats no more.

Terminal device is not connect with AP3, there are two kinds of situations here:

The first situation still preserves target BSSID in AP3, but lacks in the response indicator register of AP3 and terminal The corresponding response instruction of the MAC Address of equipment, alternatively, corresponding with the MAC Address of terminal device in the response indicator register of AP3 Response be designated as second value, for the independent address frame that terminal device is sent, the WLAN processing chip of AP3 executes following step It is rapid:

The independent address frame that the WLAN processing chip receiving terminal apparatus of S316, AP3 are sent, the WLAN of AP3 handle chip Response frame is not replied to terminal device.

In the latter case, AP3 deletes the target BSSID of itself preservation according to the second notification message, then At this moment the AP3 independent address frame that then receiving terminal apparatus is not sent.

It is found that previous AP is used when providing service with the latter AP for terminal device in embodiment as shown in Figure 7 Target BSSID when terminal device switches between the two AP, perceives the generation less than switching.In terminal device from previous AP switch to in the handoff procedure of the latter AP, the independent address frame that equal receiving terminal apparatus is sent in two AP, i.e. terminal The independent address frame that equipment is sent during switching can be received by two AP, avoid the interruption of business.Due to AP only to The terminal device connecting with AP replys response frame, in this switching process, sends although will appear two AP receiving terminal apparatus Independent address frame the case where, due to connecting terminal device only with an AP by AP controller, so ensure that two AP In only one AP reply response frame, avoid the conflict of response frame.

It is the flow diagram of the frame response method provided in an embodiment of the present invention in the stage three referring to Fig. 8, Fig. 8.

In the stage three, due to terminal device in the overlay area of AP4 without in the overlay area of AP4, terminal is set The independent address frame that preparation is sent can be received by AP4, cannot be received by the AP3.

S401, terminal device send independent address frame, and the TA of independent address frame is the MAC Address of terminal device.

AP4 is connect with terminal device, and the MAC Address that terminal device is preserved in the response indicator register of AP4 is corresponding Response instruction, also, the response is designated as the first value, and the WLAN processing chip of AP4 executes following steps:

The independent address frame that the WLAN processing chip receiving terminal apparatus of S402, AP4 are sent.

The WLAN of S403, AP4 handle chip and reply response frame to terminal device.

Here, the specific logic that the WLAN processing chip of AP4 executes step S402~S403 can refer to the WLAN processing of AP3 Chip executes the specific logic of step S208~S209, repeats no more.

It is the structural schematic diagram of another kind AP provided in an embodiment of the present invention referring to Fig. 9, Fig. 9.As shown in figure 9, the AP packet Processing module 51, sending module 52 and receiving module 53 are included, which realizes 110 He of processor shown in FIG. 1 The function of WLAN processing chip 122；The sending function of the realization radio circuit 121 of sending module 52；Receiving module 53 realizes radio frequency The receive capabilities of circuit 121.

In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in some embodiment Part, reference can be made to the related descriptions of other embodiments.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.

Claims

1. a kind of frame response method, which is characterized in that the described method includes:

The independent address frame that the WLAN processing chip receiving terminal apparatus of access point AP is sent, the independent address frame Sender address is the medium access control MAC Address of the terminal device, and the recipient address of the independent address frame is mesh Basic service set identification BSSID is marked, the target BSSID AP is used when providing service for the terminal device BSSID, the AP are the terminal device for the neighbor AP that the terminal device provides the BSSID used when service the and AP The BSSID that uses is identical when providing service, the overlay area of the overlay area of the neighbor AP and the AP there are overlapping region, The AP and the neighbor AP are by an AP controller management；

If response instruction corresponding with the MAC Address in the response indicator register in the WLAN processing chip For the first value, the WLAN handles chip and replys response frame to the terminal device, and the response is designated as the first value The terminal device is used to indicate to connect with the AP.

2. the method according to claim 1, wherein the method also includes:

If lacking response instruction corresponding with the MAC Address in the response indicator register, at the WLAN Reason chip, which is ignored to the terminal device, replys response frame；Or

If response corresponding with the MAC Address is designated as second value, the wireless local area in the response indicator register Net processing chip, which is ignored to the terminal device, replys response frame.

3. method according to claim 1 or 2, which is characterized in that the WLAN handles chip to the terminal Before device replied response frame further include:

The processor of the AP receives the first notification message that the AP controller is sent, and first notification message includes described The MAC Address of terminal device；

The processor sends the first instruction to WLAN processing chip according to first notification message；

WLAN processing chip in response to first instruction, in the response indicator register will with it is described The corresponding response instruction of MAC Address is set to the first value.

4. method according to claim 1-3, which is characterized in that the WLAN handles chip to described Terminal device is replied after response frame further include:

The processor of the AP receives the second notification message that the AP controller is sent, and the second notification message includes described The MAC Address of terminal device；

The processor sends the second instruction to WLAN processing chip according to the second notification message；

WLAN processing chip in response to second instruction, in the response indicator register removing with it is described The corresponding response instruction of MAC Address, alternatively, referring to response corresponding with the MAC Address in the response indicator register Show and is set to second value.

5. method according to claim 1-4, which is characterized in that the response indicator register preserves position Figure, the bitmap include multiple positions, and the multiple position corresponds to multiple association identifications, the instruction pair of each of the multiple position position The value of response instruction corresponding to the MAC Address of association identification is answered, the WLAN processing chip of the AP receives terminal and sets After the independent address frame that preparation is sent further include:

The WLAN processing chip is read and the association identification pair according to association identification corresponding with the MAC Address The value for the position answered.

6. method according to claim 1-5, which is characterized in that by all AP of the AP controller management There is provided the BSSID used when service for any terminal device is the target BSSID.

7. a kind of access point AP, which is characterized in that handle chip including processor and WLAN, the processor with it is described WLAN handles chip and is connected by bus,

The WLAN processing chip is used for: the independent address frame that receiving terminal apparatus is sent, and is sent out to the processor Send the independent address frame, the sender address of the independent address frame is the medium access control MAC of the terminal device Location, the recipient address of the independent address frame are target basic service set identification BSSID, and the target BSSID is the AP The BSSID used when service is provided for the terminal device, the AP provides the BSSID used when service for the terminal device There is provided for the terminal device that the BSSID used when service is identical with the neighbor AP of the AP, the overlay area of the neighbor AP There are overlapping regions with the overlay area of the AP, and the AP and the neighbor AP are by an AP controller management；

The WLAN processing chip is also used to: if the response indicator register in WLAN processing chip In response corresponding with the MAC Address be designated as the first value, Xiang Suoshu terminal device replys response frame, and the response is designated as First value is used to indicate the terminal device and connect with the AP.

8. AP according to claim 7, which is characterized in that the WLAN processing chip is also used to:

If lacking response instruction corresponding with the MAC Address in the response indicator register, ignores and set to the terminal It is standby to reply response frame；Or

If response corresponding with the MAC Address is designated as second value in the response indicator register, ignore to the end End equipment replys response frame.

9. AP according to claim 7 or 8, which is characterized in that the processor is used for:

The first notification message that the AP controller is sent is received, first notification message includes the MAC of the terminal device Address；

The first instruction is sent to WLAN processing chip according to first notification message；

The WLAN processing chip is also used to:

In response to first instruction, response instruction corresponding with the MAC Address is set in the response indicator register For the first value.

10. according to the described in any item AP of claim 7-9, which is characterized in that the processor is used for:

The second notification message that the AP controller is sent is received, the second notification message includes the MAC of the terminal device Address；

The second instruction is sent to WLAN processing chip according to the second notification message；

The WLAN processing chip is also used to:

In response to second instruction, response instruction corresponding with the MAC Address is removed in the response indicator register, Alternatively, response instruction corresponding with the MAC Address is set to second value in the response indicator register.

11. according to the described in any item AP of claim 7-10, which is characterized in that the response indicator register preserves position Figure, the bitmap include multiple positions, and the multiple position corresponds to multiple association identifications, the instruction pair of each of the multiple position position The value of response instruction corresponding to the MAC Address of association identification is answered, the WLAN processing chip is also used to:

According to and the corresponding association identification of the MAC Address read the value of position corresponding with the association identification.

12. according to the described in any item AP of claim 7-11, which is characterized in that by all AP of the AP controller management There is provided the BSSID used when service for any terminal device is the target BSSID.