CN107302774A - The transmission method and equipment of a kind of data frame - Google Patents

The transmission method and equipment of a kind of data frame Download PDF

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Publication number
CN107302774A
CN107302774A CN201610232179.2A CN201610232179A CN107302774A CN 107302774 A CN107302774 A CN 107302774A CN 201610232179 A CN201610232179 A CN 201610232179A CN 107302774 A CN107302774 A CN 107302774A
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China
Prior art keywords
channel
sta
frame
data frame
sent
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CN201610232179.2A
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Inventor
李震亚
崔剑雷
王小军
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201610232179.2A priority Critical patent/CN107302774A/en
Publication of CN107302774A publication Critical patent/CN107302774A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0027—Control or signalling for completing the hand-off for data sessions of end-to-end connection for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
    • H04W36/28—Reselection being triggered by specific parameters by agreed or negotiated communication parameters involving a plurality of connections, e.g. multi-call or multi-bearer connections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Be related to wireless communication technology field, more particularly to data frame transmission method and equipment, the loss of data frame during reducing site STA across channel roaming.A kind of STA includes sending module, for with the first access point AP working channel, that is the first channel, which is sent, indicates that STA notifies the first dormancy for entering energy-saving mode, and with the 2nd AP working channel, i.e. second channel sends the claim frame that request is associated with the 2nd AP, and the first channel is different with second channel；Receiving module, for after sending module sends the first dormancy notice, receiving the 2nd AP with second channel and agreeing to the acknowledgement frame that STA is associated with the 2nd AP, and with the STA of the first channel reception the first AP cachings data frame.Notified because STA sends the first dormancy to the first AP, the first AP, which is received, can cache STA data frame after the first dormancy is notified, STA receives the data frame of the first AP cachings, so as to reduce the loss of data frame during across channel roaming.

Description

The transmission method and equipment of a kind of data frame
Technical field
The present invention relates to the transmission method and equipment of wireless communication technology field, more particularly to a kind of data frame.
Background technology
WLAN (English：Wireless local area network, WLAN) in, website (English： Station, STA) can be (English from an access point by association process or re-association process：Access point, AP another AP) is roamed into.
Below, by taking re-association process as an example, STA is introduced from AP (referred to herein as " AP1 ") roaming To another AP (referred to herein as " AP2 ") process.
First, STA sends reassociation requests (English to AP2：Reassociation Request) frame, Including Current AP address (English：Current AP address) field, i.e. AP1 address field. Reassociation requests frame is used to indicate that AP2, STA will roam into AP2 from AP1.
AP2 is after above-mentioned reassociation requests frame is received, if agreeing to, STA is associated with AP2, is returned to STA Multiple re-association response (English：Reassociation Response) frame.Wherein, the shape of re-association response frame State code (English：Status code) it is 0, represent re-association success.Re-association response frame also includes STA Association identification (English：Association identifier, AID).
STA is after the re-association response frame of AP2 transmissions is received, according to the expression successful conditional code of re-association, It is determined that roaming into AP2 successes.
From said process, STA is roamed into during new AP2, it is necessary to communicated with AP2, is being entered , it is necessary to rest on AP2 working channel during the reception of row frame.
Generally, AP adjacent on position works in different working channels, therefore, as STA and AP2 During communication, it is impossible to rest on AP1 working channel, if now there is frame to be sent to STA by AP1, Then STA will be unable to receive the frame from AP1, cause the LOF from AP1.
When STA is in AP internetwork roamings, either using re-association process or association process, due to original AP is different with new AP working channel, therefore may be lost by the former AP frames for being sent to STA The phenomenon of mistake.
The content of the invention
The application provides the transmission method and equipment of a kind of data frame, is roamed to reduce STA in WLAN The loss of time frame.
First aspect is there is provided a kind of transmission method of data frame, in this method, and STA is with the first channel, i.e., First AP working channel, sends the first dormancy to the first AP and notifies, indicates that the STA will enter section Power mode；In addition, the STA is also with second channel, i.e., described 2nd AP working channel, to second AP sends the claim frame for indicating that the STA requests are associated with the 2nd AP, wherein, first letter Road is different with the second channel, i.e. STA across channel will roam into the 2nd AP by the first AP.
After the first dormancy notice is sent, the STA also receives described second with the second channel AP agrees to the acknowledgement frame that the STA is associated with the 2nd AP, and receives described with first channel The STA of first AP cachings data frame.
Wherein, STA is across channel when roaming, and first notifies the first AP STA to enter energy-saving mode, so When STA is with second channel transmitting/receiving wireless signal, the first AP can cache STA data frame.STA can The first channel is returned to receive the data frame of the first AP cachings.When therefore reducing across channel roaming, due to STA can not receive the data frame that the first AP and the 2nd AP is sent, the loss of the data frame caused simultaneously.
In a kind of optional implementation, the STA with first channel receive the data frame it Before, the STA receives the beacon frame from the first AP according to listening interval with first channel； The beacon frame includes the flag bit for indicating the data frame that the first AP has cached the STA, described STA receives the data frame based on the flag bit in the beacon frame with first channel.
STA can return to the first channel to receive the first AP beacon frame when reaching listening interval.If First AP beacon frame indicates that the first AP has cached the data frame of the STA, and the STA can be received in time Its data frame.If STA does not return to the first channel when reaching listening interval and attempts to receive its data frame, one Aspect, the first AP is (English by the independent address for continuing to store the STA：individually addressed) Data frame receive its data frame until the STA.On the other hand, the first AP is concurrent in arrival listening interval Send the group address (English for indicating that the first AP has cached the STA：Group addressed) data frame After beacon frame, the data frame of group address can be sent immediately.Therefore, the is returned to when the STA reaches listening interval One channel receives its data frame in time, can receive the data frame of its group address, and mitigate the first AP cachings The storage pressure of the data frame of the STA..
In a kind of optional implementation, after the first dormancy notice is sent, the STA is with described First channel sends the active notice for indicating the STA by active mode is entered to the first AP；It is described STA receives the data frame after the active notice is sent.
First AP is received after active notice, determines that STA enters active mode.Generally, an AP is being received , can be immediately to the STA if having cached the data frame of the STA after the active notice sent to a STA Send the STA of its caching data frame.Therefore, STA sends active notice to the first AP, may be such that First AP sends data frame to STA as early as possible, reduces the time delay that STA receives data frame, and mitigate the One AP storage pressure.STA is sent with the first channel to the first AP actively to be notified and receives the first AP After the STA of caching data frame, this roaming is completed, and forever can leave the first letter before roaming in next time Road, you can only to be communicated with the 2nd AP with second channel.
In a kind of optional implementation, the STA with first channel receive the data frame it Afterwards, the STA sends to the first AP and removes disassociation frame.
STA is sent to the first AP goes disassociation frame that the first AP can be made to cease attempt to send number to STA According to frame.STA can be avoided to continue with the first AP after the data frame of the first channel order caching to STA The loss of the data frame for the STA for sending data frame and causing.
In a kind of optional implementation, the STA with the second channel receive the acknowledgement frame it Afterwards, before the STA is with first channel reception data frame, the STA is with the described second letter Road is sent to the 2nd AP indicates that the STA notifies the second dormancy for entering energy-saving mode.
2nd AP can send the hair that the 2nd AP is received after STA is associated with the 2nd AP to STA Toward the data frame of the STA, that is, the new data frame received after roaming.After STA is associated with the 2nd AP, If STA returns to the first channel and attempts to receive the STA of the first AP cachings data frame, and now the Two AP send the new data frame with second channel to the STA, and STA will be unable to receive the new data frame.For The loss of new data frame is avoided, STA before the first channel is returned to indicates that the STA will enter to the second AP Energy-saving mode, according to the instruction, the 2nd AP caches the new data frame.It can thus be avoided STA is returned to During the first channel the 2nd AP with loss from second channel to the STA data frames sent.
In a kind of optional implementation, STA after it is determined that the first AP cached STA data frame, The STA of the first AP cachings data frame is just received with the first channel.
If the first AP does not cache STA data frame, STA without returning on the first AP, With the first channel received data frame, but directly communicated with second channel with the 2nd AP.Simplify STA's Processing, it is ensured that the continuity that STA communicates with the 2nd AP.
Wherein, alternatively, the STA is after the acknowledgement frame is received, if receiving finger from the 2nd AP Show that the first AP has cached the configured information of the data frame of the STA, it is determined that the first AP delays The data frame of the STA is deposited.
Second aspect includes sending module and receiving module there is provided a kind of STA, the STA, wherein, hair The transmission operation for sending module to can be used for performing in the method that above-mentioned first aspect is provided；Receiving module can be used for holding Reception operation in the method that the above-mentioned first aspect of row is provided.The STA may also include processing module, can by with It is set to the above-mentioned sending module of control and performs above-mentioned transmission operation, and is configured as controlling above-mentioned receiving module to hold The above-mentioned reception operation of row.
The third aspect includes process circuit and antenna there is provided a kind of STA, the STA, and process circuit is used for The control operation that STA sends and receives in the method that first aspect is provided is realized, carrying dormancy is produced and receive Notify, the information such as acknowledgement frame, and information and/or data frame are sent and received by antenna.
Fourth aspect may include that above-mentioned first aspect is related to there is provided a kind of WLAN in the WLAN And the first AP, the 2nd AP and STA.
5th aspect is there is provided a kind of computer-readable storage medium, and the computer-readable storage medium is used for available for storage The STA of above-mentioned first aspect offer above-mentioned transmission operation is provided and the program of operation is received.
6th aspect is there is provided the transmission method of another data frame, and the process of this method is as follows：
STA is sent to the first AP with the working channel of the first channel, i.e. the first AP and is indicated the STA The dormancy for entering energy-saving mode is notified, and with the working channel of second channel, i.e. the 2nd AP, to second AP sends the claim frame for indicating that the STA requests are associated with the 2nd AP, wherein, first letter Road is different with the second channel, and the claim frame includes the identification information of the first AP and is used for Indicate first channel configured information different from the second channel；
First AP is notified according to the above-mentioned dormancy received, determines that the first STA will enter energy-saving mode, Cache the STA received data frame；
2nd AP is received after above-mentioned claim frame, determines that the STA will be with institute according to the claim frame The 2nd AP associations are stated, the first AP is determined according to the identification information of the first AP, and according to institute State configured information and determine that first channel is different from the second channel；2nd AP is it is determined that can be with After being associated with the STA, sent to the first AP for described in obtaining and being cached on the first AP The data frame of STA data frame obtains request；
First AP is obtained in response to the data frame and asked after the data frame acquisition request is received, The data frame of the STA is sent to the 2nd AP；
2nd AP receives the data frame of the STA from the first AP, and it is determined that can be closed with the STA After connection, acknowledgement frame is sent to the STA in response to the claim frame, and after the acknowledgement frame is sent, The STA will be sent to from the first AP STA received data frame with the second channel；
The STA is sent after the dormancy notice, is received with the second channel from the 2nd AP's The acknowledgement frame, and the first AP is received receiving at the 2nd AP with the second channel State the STA cached after dormancy is notified data frame.
Wherein, by the 2nd AP forward the first AP caching STA data frame, also as far as possible reduce STA across The loss of data frame in channel roam procedure.
7th aspect includes sending module and receiving module there is provided a kind of STA, the STA, wherein, hair Module is sent to can be used for the transmission operation for performing the STA in the method that above-mentioned 6th aspect is provided；Receiving module can Reception operation for performing the STA in the method that above-mentioned 6th aspect is provided.The STA may also include place Module is managed, can be configured as controlling above-mentioned sending module to perform above-mentioned transmission operation, and be configured as control Above-mentioned receiving module performs above-mentioned reception operation.
Eighth aspect includes process circuit and antenna there is provided a kind of STA, the STA.Process circuit is used for Realize the control operation that STA sends and receives in the method that the 6th aspect is provided, generation information and/or data Frame, and the information and/or data frame of generation are sent by antenna, and by antenna receive information and / or data frame.
9th aspect is there is provided a kind of AP, and the AP is the first AP at least two AP, it may include the One receiving module, number is received for performing the first AP in the method that above-mentioned 6th aspect is provided at STA According to the operation of frame and/or information；Second receiving module, for performing in the method that above-mentioned 6th aspect is provided First AP is from other network equipments, such as：Received at router or other AP STA data frame and/ Or the operation of information；Sending module can be used for performing the first AP's in the method that above-mentioned 6th aspect is provided Send operation；Processing module can be configured as controlling the above-mentioned transmission of above-mentioned sending module execution to operate, and by It is configured to above-mentioned first receiving module of control and the second receiving module performs and receives operation, and other processing Operation.
Tenth aspect is there is provided a kind of AP, and the AP is the first AP at least two AP, it may include place Circuit, antenna and network transceivers are managed, wherein, process circuit can be used for performing the method that the 6th aspect is provided In the first AP transmitting-receiving control operation, communicated by antenna with STA, by network transceivers with The network equipment, such as：Router or other AP are communicated.
Tenth one side is there is provided a kind of AP, and the AP is the 2nd AP at least two AP, it may include First receiving module, is received for performing the 2nd AP in the method that above-mentioned 6th aspect is provided at STA The operation of data frame and/or information；Second receiving module, for performing in the method that above-mentioned 6th aspect is provided The 2nd AP from other network equipments, such as：Received at router or other AP STA data frame and / or information operation；First sending module, available for second in the method for performing above-mentioned 6th aspect offer AP is operated to the STA transmissions for sending information and/or data frame；Second sending module, it is above-mentioned available for performing 6th aspect provide method in the 2nd AP to the network equipment such as router or other AP send information and/ Or the transmission operation of data frame；Processing module can be configured as the first sending module of control and the second sending module Above-mentioned transmission operation is performed, and is configured as controlling the first receiving module and the second receiving module to perform reception Operation, and other processing operations.
12nd aspect is there is provided a kind of AP, and the AP can be the 2nd AP at least two AP, can Including process circuit, antenna and network transceivers, wherein, process circuit can be used for performing the 6th aspect offer Method in the 2nd AP transmitting-receiving control operation, communicated, received by network with STA by antenna Device and the network equipment are sent out, such as：Router or other AP are communicated.
There is provided a kind of WLAN in terms of 13rd, above-mentioned 6th aspect is may include in the WLAN The first AP, the 2nd AP and STA being related to.
Fourteenth aspect can be used for storage to use there is provided a kind of computer-readable storage medium, the computer-readable storage medium In the program of the STA for controlling above-mentioned 7th aspect offer above-mentioned transmission operation and reception operation.
15th aspect can be used for storage to use there is provided a kind of computer-readable storage medium, the computer-readable storage medium The AP provided in terms of above-mentioned 9th aspect or the tenth is controlled above-mentioned transmission operation, processing operation and reception The program of operation.
16th aspect can be used for storage to use there is provided a kind of computer-readable storage medium, the computer-readable storage medium In control it is above-mentioned tenth on the one hand or the 12nd aspect provide AP above-mentioned transmission operation, processing operation and Receive the program of operation.
Brief description of the drawings
A kind of structural representation for WLAN that Fig. 1 provides for embodiments herein；
In the WLAN that Fig. 2~Fig. 7 provides for embodiments herein, the flow of STA and AP communications Figure；
The structural representation for the first STA that Fig. 8 provides for embodiments herein；
The structural representation for second of STA that Fig. 9 provides for embodiments herein；
The structural representation for the first AP that Figure 10 provides for embodiments herein；
The structural representation for second of AP that Figure 11 provides for embodiments herein.
Embodiment
In order to more fully understand the above-mentioned purpose, scheme and advantage of embodiments herein, provided hereinafter detailed Thin description.The detailed description by using the accompanying drawings such as block diagram, flow chart and/or example, illustrate device and/ Or the various embodiments of method.In these block diagrams, flow chart and/or example, one or more work(are included Can and/or it operate.It will be understood by the skilled person that：Each work(in these block diagrams, flow chart or example It and/or can operate, can separately or cooperatively be implemented by various hardware, software, firmware, Huo Zhetong Any combination for crossing hardware, software and firmware is implemented.
A kind of structural representation for WLAN that Fig. 1 provides for embodiments herein.As shown in figure 1, The WLAN 10 is to include：At least two AP：Wherein, at least two AP include AP101 and AP102；The WLAN 10 also includes at least one STA, and at least one STA includes STA103。
Wherein, AP101 is the AP of association before STA103 roamings, and AP102 is association after STA103 roamings AP.
The first channel is used when STA103 communicates with AP101, the is used when STA103 communicates with AP102 Two channels.First channel is AP101 working channel, and second channel is AP102 working channel.The One channel is different with second channel.
When a STA from an AP roams into another AP, and roam former and later two AP work letter When road is different, the roaming that the STA is carried out is across channel roaming.
STA103, when roaming into AP102 from AP101, is to roam into AP102 across channel.
STA103 can have WLAN for notebook computer, mobile phone, tablet personal computer or wearable device etc. The equipment of function.
Fig. 2 shows in embodiments herein that STA roams into the 2nd AP's from the first AP across channel During, the flow that STA communicates with each AP.
Wherein, during STA, the first AP and the 2nd AP can be respectively the WLAN shown in Fig. 1 STA103, AP101 and AP102.
Below, by taking the process communicated between STA103 and AP101 and AP102 as an example, the application is illustrated Embodiment provide, STA from the first AP during channel roams into the 2nd AP, STA with it is each The flow of AP communications.
As shown in Fig. 2 the flow comprises the following steps：
S201：The STA103 associated with AP101 determines to roam into AP102, and determines that what is carried out overflows Trip is across channel roaming.
As it was previously stated, STA103 can be better than AP101 signal quality in the signal quality for finding AP102 When, it is determined that to roam into AP102.
STA103 can also be less than under default message transmission rate in the message transmission rate for finding AP101 Limit, and AP102 signal quality is higher than default signal quality threshold (such as：Signal to noise ratio is higher than default Snr threshold) when, it is determined that to roam into AP102.
STA103 determines that the situation that roam into AP102 can have a variety of, these are only example.
Alternatively, the first channel that STA103 is used when it is determined that being communicated with AP101, and it is logical with AP102 When the second channel used during letter is different, it is determined that the roaming to be carried out is across channel roaming.
S202：STA103 after channel roams into AP102 it is determined that will send first to AP101 and stop Sleep and notify, first dormancy notifies to be used to indicate that STA103 will enter energy-saving mode.
In WLAN, a STA can be by sending a frame to an AP, and the frame includes power (Power Management) field is managed, and the value of the field is set to " 1 ", to indicate the STA Economize on electricity (English will be entered：Power save, PS) pattern.In the power management fields of AP in the frame Value be " 1 " and in the case of, determine that STA103 enters energy-saving mode, after the data frame of the STA is received, Will data cached frame, rather than data frame issued into the STA immediately.The data cached frames of AP refer to the AP The data frame is stored, and waits suitable opportunity to send the data frame.After the data frame of storage is sent, AP It can not continue to store the data frame.
In step S202, the value of power management field can be set to " 1 " by STA103, to indicate AP101： STA103 will enter energy-saving mode.So, the value of power management fields of the AP101 in the frame received In the case of for " 1 ", determine that STA103 will enter energy-saving mode, and cache the STA103 received number According to frame.
Although STA103 have sent the first dormancy to AP101 and notify, STA103 does not enter economize on electricity mould Formula, but can be communicated with second channel and AP102.That is, STA103 has cheated AP101, AP101 is set to think that STA103 enters energy-saving mode.
In embodiments herein, AP different with least two working channels STA103, i.e. AP101 Communicated with AP102, in order that STA103 does not omit working channel for the channel when without using a channel The data frames that are sent to STA of AP, STA sends dormancy with the channel before a channel is left and notifies, To cheat the working channel AP as the channel, i.e. AP101.STA makes the AP101 that working channel is the channel Take for the STA103 and be in energy-saving mode, and cache the data frame for being sent to the STA103, to avoid losing Lose the data frame that working channel sends for the AP101 of the channel to STA103.
S203：After STA103 can be notified sending the first dormancy to AP101, with second channel to AP102 Claim frame is sent, request is associated with AP102, and the claim frame can be reassociation requests frame or association request frame.
STA103 can send the first dormancy in the forward direction AP101 that above-mentioned claim frame is sent to AP102 and lead to Know, during avoiding with second channel to AP102 transmission claim frames, omit AP101 and sent to STA103 Data frame.
STA103 can also be notified sending the rear of claim frame to AP102 to AP101 the first dormancy of transmission. Because the time for sending claim frame is shorter, sent sending above-mentioned the rear of claim frame to AP102 to AP101 First dormancy notifies not having big influence.
S204：AP102 is after above-mentioned claim frame is received, however, it is determined that itself can provide clothes for STA103 Business, i.e. STA103 can be associated with AP102, then send response frame to STA103 with second channel.
Wherein, if in step S203, STA103 have sent reassociation requests frame to AP102, then step In S204, the response frame that AP102 is sent can attach most importance to association response frame；If in step S203, STA103 Association request frame is have sent to AP102, then in step S204, the response frame that AP102 is sent can be association Response frame.
S205：STA103 with the first channel after the first dormancy notice is sent to AP101, with the first channel Receive the data frame of AP101 cachings.
STA103 can after the response frame in receiving step S204, and/or before response frame is received, Receive the data frame of AP101 cachings.
In a wireless local area network, generally (STA can pass through during a STA is associated with an AP Re-association process or association process are associated with AP), listening interval (English can be consulted with the AP：listen interval).The listening interval is (such as：300ms) it is generally transmission beacon (English：Beacon) frame Cycle is (such as：Integral multiple 100ms).If STA be in energy-saving mode, can using listening interval as Cycle temporarily wakes up, to receive the beacon frame of AP transmissions.Accordingly, AP is it is determined that STA enters economize on electricity After pattern, flag bit can be added in corresponding beacon frame by the cycle of listening interval.The flag bit is used to refer to Show whether AP has cached STA data frame.If AP has cached STA data frame, beacon is being sent It can indicate that AP has cached STA data frame during frame.Beacon frames of the STA based on reception determines whether AP delays STA data frame is deposited.
In embodiments herein, STA103 with AP101 with that in AP101 association process, can consult to detect Listen interval.Alternatively, because STA103 have sent after the first dormancy notice to AP101, STA103 is simultaneously Energy-saving mode is not actually entered, can be using listening interval as the cycle in order to receive the data frame of AP101 cachings Intercept the frame in the first channel.If STA103 have received the beacon frame of AP101 transmissions with the first channel, And the beacon frame indicates that AP101 has cached STA103 data frame, then STA103 can attempt to receive Data frame.
S206：STA103 can go to associate after the data frame of AP101 cachings has been received with AP101.
Such as：STA103 can send to AP101 and remove association (English：Disassociation) frame, with AP101 Go association；Or
STA103 can send to AP101 and remove disassociation frame and remove certification (Deauthentication) frame, with AP101 Go association.
S207：STA103 is communicated after going to associate with AP101 with second channel with AP102.Such as： Data from internet are received by AP102.
In flow shown in Fig. 2, when STA103 determines to carry out across channel roaming, sent to AP101 First dormancy notifies that such AP101 can cache STA103 data frame；STA103 with AP102 During association (during waiting above-mentioned response frame), or (received after being associated with AP102 After above-mentioned response frame), receive the STA103 of AP101 cachings data frame.It can so avoid as far as possible The loss of STA103 data frame.
During shown in Fig. 2, STA103 to AP101 after the first dormancy notice is sent, with the first letter , can be using a variety of sides including following manner when road receives the STA103 of AP101 cachings data frame Formula：
Mode one, the data frame for receiving by intercepting beacon frame AP101 cachings
In mode one, STA103 with the first channel receive AP1 caching STA103 data frame it Before, STA103 receives the beacon frame from AP101 according to listening interval with the first channel；If beacon Frame indicates that AP101 has cached STA103 data frame, then STA103 receives AP101 with the first channel and delayed The STA103 deposited data frame.
Mode two, the data frame by sending active notice reception AP101 cachings
In mode two, after STA103 sends the first dormancy notice to AP101 with the first channel, STA103 With the first channel receive AP101 caching STA103 data frame before, STA103 with the first channel to AP101 sends active notify.It is active to notify to indicate that STA103 enter active mode.AP101, which is received, to live After jump is notified, determine that STA103 enters active mode.Now, AP101 typically can be immediately to STA103 Send STA103 data frame.STA103 is connect after active notify is sent to AP101 with the first channel Receive the STA103 of AP101 cachings data frame.
Wherein, STA103 can send a frame to AP101, and the frame includes power management field, and will The value of the field is set to " 0 ".The value of power management fields of the AP101 in the frame received is " 0 " In the case of, determine that STA103 will enter active mode.
STA103 is general after AP102 response frame is received, and is sent and lived to AP101 with the first channel Jump is notified.Because now STA103 is associated with AP102, AP101 is in STA103 and AP102 Will not be received as association is latter needs the frame for being sent to STA103.STA103 can be notified immediately with active Receive the frame of AP101 cachings.Although STA103 does not simultaneously operate in the first channel, and AP101 thinks this STA103 is in active state afterwards, can send frame to STA103, but hereafter AP101 will not receive To needing to be sent to STA103 frame, therefore do not result in and need the loss for the frame for being sent to STA103.It is optional Ground, STA103 can go to associate, to avoid AP101 from tasting with AP101 immediately after data frame has been received Try to send data frame to STA103.
, can be by aforesaid way during the data frame for the STA103 that AP101 cachings are received in STA103 One and mode two be combined with each other, such as：The first receiving portion data frame of employing mode one, then employing mode Two receive remaining data frame.Combination can have a variety of, be not limited to the example above, as long as can receive The STA103 of AP101 cachings data frame can be with.
Alternatively, in the flow shown in Fig. 2, before the frame during STA103 intercepts the first channel, STA103 The second dormancy can be sent with second channel to AP102 to notify.Correspondingly, the first letter is intercepted in STA103 After frame in road (if data frame need not be received), or in STA103 with the first channel received data After frame, STA103 can send active notify with second channel to AP102.
Alternatively, in the flow shown in Fig. 2, the sound from AP102 is received with second channel in STA103 Answer after frame, STA103 sends the second dormancy to AP102 with second channel and notified.
AP102 is after STA103 is associated with AP102, and STA103 receives AP101 with the first channel and cached STA103 data frame when, if AP102 receives STA103 data frame, STA103 can be cached Data frame, it is to avoid STA103 admission control.
Alternatively, in the flow shown in Fig. 2, STA103 can receive AP102 transmission response frame it Afterwards, the STA103 of AP101 cachings data frame is received with the first channel.
STA103 can also receive AP101 before the response frame of AP102 transmissions is received with the first channel The STA103 of caching data frame.
Or, STA103 also can receive AP102 hairs both after the response frame of AP102 transmissions is received Before the response frame sent, the STA103 of AP101 cachings data frame is received with the first channel.
Alternatively, in the flow shown in Fig. 2, AP101 cachings are received with the first channel in STA103 Before STA103 data frame, STA103 determines that AP101 has cached STA103 data frame.I.e. STA103 can just be received after it is determined that AP101 cached STA103 data frame with the first channel The data frame of AP101 cachings.If AP101 does not cache STA103 data frame, STA103 It need not return on AP101, with the first channel received data frame, but directly with second channel and AP102 Communication.
In flow shown in Fig. 2, STA103, which receives the mode of the data frame of AP101 cachings and opportunity, to be had The implementation of plurality of optional, it is as shown in the table.Can be in any combination between this several ways.It is several below In the description of mode, it is illustrated by taking re-association process as an example.Certainly, in this several ways, STA103 Also it can be associated by association process with AP102.
Below, made introductions all round above-mentioned four kinds of modes with reference to accompanying drawing.
【Mode one】
In mode one, STA103 sends the second dormancy to AP102 after re-association response frame is received, first and led to Know, then with the STA103 of the first channel reception AP101 cachings data frame.
The flow of mode one specifically refers to Fig. 3 and associated description.
S301~S304：Same S201~S204 respectively；
S305：STA103 is sent out to AP102 first after the re-association response frame of AP102 transmissions is received The second dormancy is sent to notify；
So, when STA103 subsequently receives the STA103 data frame of AP101 cachings with the first channel, If AP102 receives STA103 data frame, in the case where STA103 enters energy-saving mode, it is possible to Cache STA103 data frame, it is to avoid the loss of data frame.
S306：STA103 receives AP101 after the second dormancy notice is sent to AP102 with the first channel The data frame of caching.
S307：STA103 goes to associate after the data frame of AP101 cachings is received with AP101.
Go after association, AP101 will no longer cache STA103 data frame.
S308：Performing after step S307 goes to associate with AP101, STA103 is with second channel to AP102 Active notice is sent, indicates that STA103 will access active mode, after active notify is sent, with AP102 Carry out frame transmission.
Or, can not also send active notice, keep energy-saving mode, according to in AP102 association process The data frame of AP102 cachings is received with the AP101 listening intervals consulted.
In flow shown in Fig. 3, STA103 is first sent after re-association response frame is received to AP102 Second dormancy notifies that so, AP102, will be slow for STA103 after STA103 data frame is received Deposit data frame；Afterwards, STA103 receives the data frame of AP101 cachings, and AP101 is received in STA103 During the data frame of caching, because AP102 thinks that STA103 enters energy-saving mode, if there is STA103 Data frame will be the data cached frames of STA103, the loss of data frame can be thus avoided as far as possible. STA103 goes to associate, so, AP101 would not be again after data frame is received from AP101 with AP101 For the data cached frames of STA103；STA103 after going to associate with AP101, with second channel with AP102 Carry out frame transmission.
Alternatively, during the re-association response frame to be received such as STA103, STA103 can according to The listening interval that AP101 consults in advance receives the STA103 of AP101 cachings data frame, i.e., shown in Fig. 4 Flow.So, the data frame that AP101 can be avoided to cache is excessive, causes admission control.
Alternatively, if STA103 is within the default period sent to AP101 before the first dormancy is notified, STA103 is more than default message transmission rate threshold from the AP101 average data transfer rates for receiving data frame Value, STA103 just can be according to listening interval with the first channel sense beacon frame and the data frame of order caching； Otherwise, STA103 will not receive AP101 during re-association response frame to be received is waited with the first channel The data frame of caching.
Or, STA103 only can receive re-association response frame, and send the second dormancy notice to AP102 Afterwards, the data frame of AP101 order cachings is just returned to, during re-association response frame is waited, not with the One channel received data frame.
In addition, in step S306, if AP101 does not cache STA103 data frame, AP101 The beacon frame of transmission would not instruct that AP101 has cached STA103 data frame, between STA103 is according to intercepting Every received beacon frame, however, it is determined that beacon frame does not indicate that AP101 has cached STA103 data frame, then may be used Step S307~S310 is directly performed, frame transmission is carried out with second channel and AP102.
【Mode two】
In mode two, STA103 is during re-association response frame is waited, according to listening interval with the first letter Road receives the STA103 of AP101 cachings data frame；And STA103 receive re-association response frame it Afterwards, first send the second dormancy to AP102 to notify, AP101 cachings are then received with the first channel again STA103 data frame.
The flow of mode two specifically refers to Fig. 4 and associated description.
Flow shown in Fig. 4 is compared with the flow shown in Fig. 3, many step S403 '：STA103 After step S403 sends reassociation requests frame to AP102, step S404 receives re-association response frame Before, according to listening interval, the data frame of AP101 cachings is received with the first channel.
I.e.：STA103 is not only after re-association response frame is received, with the data of the first channel order caching Frame, also receives the data frame of AP101 cachings during re-association response frame is waited, and number can be avoided as far as possible Excessive according to frame, AP101 does not cache the admission control caused.
In remaining step, step S401~step S403 is respectively with step S301~step S303；Step S404~ Step S408 is respectively with step S304~step S308.
In addition, in step S406, if AP101 does not cache STA103 data frame, AP101 The beacon frame of transmission would not instruct that AP101 has cached STA103 data frame, between STA103 is according to intercepting Every the beacon frame for receiving AP101 transmissions, however, it is determined that beacon frame does not indicate that AP101 has cached STA103 Data frame, then can directly perform step S407~S408, frame transmission is carried out with second channel and AP102.
【Mode three】
In mode three, STA103 is after re-association response frame is received, however, it is determined that AP101 has cached STA103 Data frame, first to AP102 send the second dormancy notify, then with the first channel receive AP101 caching STA103 data frame.
The flow of mode three specifically refers to Fig. 5 and associated description.
The difference of mode three and mode one is, in mode three, STA103 receive re-association response frame it Afterwards, it is not directly to send the second dormancy to AP102 to notify, but it is determined that AP101 has cached STA103 Data frame in the case of, just to AP102 send the second dormancy notify, then again with the first channel receive The STA103 of AP101 cachings data frame.
STA103 can in the following way including various ways, determine that AP101 has cached STA103's Data frame.
Mode A
STA103 sends the first dormancy to AP101 when it is determined that to roam into AP102, not only and notified, also Notify AP101：STA103 will be roamed, and roam into AP102.
Wherein, STA103 by the frame where power management field or can pass through list in step S5021 Only frame indicates that STA103 will roam into AP102, such as：Indicate that STA103 will using 1 bit information Roaming, AP102 mark is indicated using multiple bit informations.
AP101 can know that STA103 will roam into AP102 according to above-mentioned notice, then receiving STA103 Dormancy notify after, on the one hand cache the STA103 received data frame, on the other hand pass through step S5022 Notify AP102：AP101 has cached STA103 data frame.
AP102, can be by step S5023 to STA103 after the above-mentioned configured information of AP101 transmissions is received Send (can also be taken for indicating that AP101 has cached the configured information of STA103 data frame by a frame With the configured information).
STA103 from AP102 after the configured information is received, it is determined that AP101 has cached STA103's Data frame.
Wherein, step S5022 can occur before or after step S503, be not limited to shown in Fig. 5 Occur after step S503, because, once AP101 have received first stopping for STA103 transmissions Sleep and notify, then when there is STA103 data frame, STA103 data frame will be cached, therefore, can When can also be had not enough time in STA103 to AP102 transmission reassociation requests frames, AP101 is just buffered STA103 data frame, is asked in this way it is possible to which AP101 sends re-association in STA103 to AP102 Ask and AP102 is indicated before frame：AP101 has cached STA103 data frame, and AP102 believes according to the instruction Breath determines that AP101 has cached STA103 data frame.
AP102 is after the reassociation requests frame that step S503 receives STA103 transmissions, however, it is determined that AP101 STA103 data frame has been cached, then has been sent by step S5023 to STA103 for indicating AP101 The configured information of STA103 data frame is cached, step needs receive re-association in step S503 please Asking could perform after frame, because only that have received reassociation requests frame, AP102 just can determine that STA103 It can be communicated with second channel with AP102, the configured information STA103 so sent can just be received.AP102 To STA103 the configured information can be sent before or after step S504 sends re-association response frame.
Mode B
AP101 is after step S502 the first dormancy for receiving STA103 is notified, if receiving STA103 number According to frame, then STA103 data frame is cached.
As it was previously stated, AP101 is after it is determined that STA103 enters energy-saving mode, can using listening interval as the cycle Flag bit is added in corresponding beacon frame.The flag bit is used to indicate whether AP101 has cached STA103 Data frame.If AP101 has cached STA103 data frame, AP101 can be indicated when sending beacon frame STA103 data frame is cached.Beacon frames of the STA103 based on reception determines whether AP101 caches STA103 data frame.
STA103 is have sent in step S503 after reassociation requests frame, and step S504 receives re-association sound Answer before frame, during waiting re-association response frame, STA103 performs step S5024：According to above-mentioned Listening interval, with the above-mentioned beacon frame of the first channel sense, if the beacon frame listened to indicates that AP101 is cached STA103 data frame, it is determined that AP101 has cached STA103 data frame.
As it was previously stated, STA103 with AP101 when associating, listening interval, STA103 can be consulted with AP101 At the time of AP101 transmission beacon frames can be calculated, STA103 can send letter in the AP101 calculated Mark frame at the time of before a certain moment when intercept AP101 transmission beacon frame, in the AP101 calculated The series of fortified passes that a certain moment after at the time of sending beacon frame is sent with the AP102 to be received such as second channel again Join response frame.
Such as：It is moment a that STA103, which is calculated at the time of AP101 sends beacon frame, and STA103 can be Beacon frame is intercepted at the time of a-0.01 seconds, frame biography is carried out with second channel and AP102 at the time of a+0.01 seconds It is defeated.
In remaining step, step S501~step S504 is respectively with step S301~step S304；Step S506~ Step S508 is respectively with step S304~step S308.
In mode three, STA103 is after re-association response frame is received, it is determined that AP1 has cached STA103 Data frame in the case of, just to AP102 send the second dormancy notify and perform subsequently connect with the first channel The step of data frame for the STA103 for receiving AP101 cachings.
Alternatively, if AP101 does not cache STA103 data frame, STA103 can be sent out to AP102 Frame is sent, frame includes configured information, for indicating that STA103 will go to associate with AP101, AP102 is received After the configured information, AP101 is notified：STA103 goes to associate with AP101.
It is similar with mode two, for mode B, STA103 during re-association response frame is waited, if With the first channel sense to beacon frame indicate that AP101 has cached STA103 data frame, also can directly with First channel receives the data frame of these cachings.So data frame can be avoided excessive as far as possible, AP101 cachings hold Amount deficiency causes the loss of data frame.Which is mode four.
Alternatively, if STA103 is within the default period sent to AP101 before the first dormancy is notified, STA103 is more than default message transmission rate threshold from the AP101 average data transfer rates for receiving data frame Value, STA103 just can be according to listening interval with the first channel sense beacon frame and the data frame of order caching； Otherwise, STA103 will not be during re-association response frame to be received be waited, to be received on the first channel The data frame of AP101 cachings.
【Mode four】
In mode four, STA103 is during re-association response frame is waited, according to listening interval with the first letter Road receives the STA103 of AP101 cachings data frame；And after re-association response frame is received, however, it is determined that AP101 has cached STA103 data frame, and first sending the second dormancy to AP102 notifies, then with the first letter Road receives the STA103 of AP101 cachings data frame.
The flow of mode four specifically refers to Fig. 6 and associated description.
In mode four, STA103 not only in step S606 order caching data frames, is also waiting re-association to ring During answering frame, step S6024 is performed：If being indicated in the beacon frame listened to, AP101 is cached STA103 data frame, also order caching data frame.
Opportunity etc. that STA103 intercepts the opportunity of beacon frame, return to AP102 refers to correlation in mode three Description, is repeated no more here.
In remaining step, step S601~step S603 is respectively with step S501~step S504；Step S604~ Step S608 is respectively with step S504~step S508；Step S6024 is with step S5024.
Similarly, if AP101 does not cache STA103 data frame, STA103 can be sent out to AP102 Frame is sent, frame includes configured information, for indicating that STA103 will go to associate with AP101, AP102 is received After the configured information, AP101 is notified：STA103 goes to associate with AP101.
In one~mode of aforesaid way four, STA103 is according to listening interval, with the first channel sense beacon frame, Refer to that STA103 is returned on AP101 according to listening interval from AP102, with AP101 the first channel Beacon frame or (in part way) are intercepted after beacon frame and order caching data frame is intercepted, with the Two channels carry out frame transmission with AP102, the re-association response frame for waiting AP102 to be received to send.Under One listening interval is come then again by that analogy.
In addition, except shown in Fig. 2~Fig. 6 STA103 receive AP101 caching data frame method it Outside, embodiments herein additionally provides another method, can refer to Fig. 7.
In flow shown in Fig. 7, the STA103 of AP101 cachings number is forwarded from AP102 to STA103 According to frame.The flow is also to be illustrated by taking re-association process as an example, certainly, and STA103 can also pass through association Process is associated with AP102.
As shown in fig. 7, the flow comprises the following steps：
S701~S702：Same S201~S202 respectively.
S703：STA103 sends the identification information that AP101 is carried in reassociation requests frame, frame to AP102, The identification information can be AP101 medium education (Medium Access Control, MAC) Location；Also carried in message for indicating that STA103 communicates used second channel and STA103 with AP102 The configured information different from second channel used in AP101 communications, the configured information can take 1 bit, Such as：When the configured information takes " 1 ", two channel differences are represented, i.e. what STA103 was carried out is across letter Road is roamed；When the configured information takes " 0 ", represent that two channels are identical.
S704：AP102 is after reassociation requests frame is received, the mark letter of the AP101 in message Breath determines AP101, and determines that STA103 is to roam into AP102 across channel according to configured information.
S705：AP102 determines that service can be provided for STA103.
S706：AP102 is after step S705 is determined to provide for STA103 and serviced, to AP101 Send and obtain request, the STA103 cached for obtaining on AP101 data frame.
Such as：AP102 can carry STA103 identification information in request is obtained, and AP101 can be according to receipts To AP101 acquisition request in STA103 identification information, determine that AP102 will obtain STA103 Data frame.
S707：If AP101 receives STA103 data frame after step S702, data frame can be delayed Deposit, when receiving the acquisition request of AP102 transmissions, the STA103 of caching data frame is sent to AP102。
S708：AP102 is after step S705 is determined to provide for STA103 and serviced, you can to STA103 sends re-association response frame.
Although illustrating S708 in Fig. 7 after step S706 and step S707, in fact, step S708 It can be located at before step S706 or step S707.
S709：AP102 will be transmitted to STA103 from the AP101 STA103 received data frame.
This method is overflow STA103 across channel by the transmission of the data frame between AP101 and AP102 Data frame during trip is sent to STA103, and the loss of data frame in roam procedure can be avoided as far as possible.
In flow shown in Fig. 2~Fig. 7, the step of STA103 notifies to go to associate with AP101 is optional. Because：In current WLAN, after an AP can not receive STA frame within a period of time, It will be considered that STA goes association.
Wherein, AP102 can draw the flow for being sent to STA103 after STA103 is associated with AP102 Lead AP102.On, so, after STA103 is associated with AP102, AP101 would not be received STA103 data frame.So, even if STA103 does not go with AP101 actively to associate, as long as in TA103 When being associated with AP102, the data frame for the STA103 that AP101 is cached all has been received by STA103, due to AP101 will not receive STA103 data frame after STA103 is associated with AP102, then do not result in The loss of STA103 data frame.
For in the flow shown in Fig. 2, STA103 pass-through modes two send the mode actively notified and connect Receive the mode of the STA103 of AP101 cachings data frame, it is understood that there may be a kind of situation, i.e.,：
If STA103 sends the active STA103 for notifying and having received AP101 cachings data to AP101 During frame, AP102 does not also send re-association response frame to STA103, and AP102 will not also will be sent to STA103 Flow be directed to AP102；And AP101 is received after the active notice of STA103 transmissions, if receiving The data frame received is then directly issued STA103 by STA103 data frame；If now STA103 with The re-association response frame that the AP102 to be received such as second channel is sent, then can cause STA103 data frame Lose.
Therefore, for aforesaid way two, alternatively, STA103 can delay receiving AP101 with the first channel After the STA103 deposited data frame, to AP101 send remove disassociation frame, with avoid AP101 directly to STA103 sends data frame, causes the loss of STA103 data frame.
The structural representation for the first STA that Fig. 8 provides for embodiments herein.As illustrated, should STA includes：
Sending module 801, is notified for sending the first dormancy to the first access point AP with the first channel, the One dormancy notifies instruction STA to enter energy-saving mode, and the first channel is the first AP working channel；
Sending module 801, is additionally operable to send claim frame to the 2nd AP with second channel, claim frame indicates STA Request is associated with the 2nd AP, and second channel is the 2nd AP working channel, the first channel and second channel It is different；
Receiving module 802, for after sending module 801 sends the first dormancy notice, being connect with second channel The acknowledgement frame from the 2nd AP is received, acknowledgement frame indicates that the 2nd AP agrees to that STA is associated with the 2nd AP；
Receiving module 802, is additionally operable to after sending module 801 sends the first dormancy notice, with the first letter Road receives the STA of the first AP cachings data frame.
Alternatively, receiving module 802, are additionally operable to before with the first channel received data frame, according to intercepting Interval, the beacon frame from the first AP is received with the first channel；Beacon frame includes indicating the first AP cachings The flag bit of STA data frame, receiving module 802, specifically for：Based on the flag bit in beacon frame, With the first channel received data frame.
Alternatively, sending module 801, are additionally operable to sending after the first dormancy notifies, with the first channel to the One AP sends active notify；It is active to notify to indicate that STA enter active mode；Receiving module 802 is specific For：After sending module 801 sends active notify, with the first channel received data frame.
Alternatively, sending module 801, are additionally operable to：In receiving module 802 with the first channel received data frame Afterwards, sent with first channel to the first AP and remove disassociation frame.
Alternatively, sending module 801, are additionally operable to：Acknowledgement frame is received with second channel in receiving module 802 Afterwards, before with the first channel received data frame, the second dormancy is sent to the 2nd AP with second channel and notified, Second dormancy notifies to indicate that STA will enter energy-saving mode.
Wherein, other optional implementations of the STA refer to the realization of STA in Fig. 2~Fig. 6.Wherein, Sending module 801 is used for the transmission operation for performing STA, and receiving module 802 is used for the reception for performing STA Operation.Alternatively, the STA may also include processing module, and behaviour is sent for controlling sending module 801 to perform Make, and control receiver module 802 performs and receives operation.
The structural representation for second of STA that Fig. 9 provides for embodiments herein.The STA can be pen Remember this computer, mobile phone, tablet personal computer or wearable device or any other have the equipment of wireless lan function. As illustrated, the STA includes：The pair of process circuit 901 and one or multiple antenna 902.
Wherein, transmitting-receiving can share common antenna 902, or antenna 902 may include transmission antenna and receive day Line, transmission antenna is used for the information for producing process circuit 901 and/or data frame is sent, reception antenna Process circuit 901 is given to for receive information and/or data frame, and by the information received and/or data frame.
Wherein, process circuit 901 may include the circuit being located on one or more chip, alternatively, may be used also It is located at printed circuit board (PCB) (English including other：Printed circuit board, PCB) on circuit.
Such as：Process circuit 901 may include：
The general processor of general processing function for realizing；
Application specific processor for realizing wireless LAN communication protocol processes function, such as：At data signal Digital signal processor (the English of reason：Digital signal processor, DSP)；And
Intermediate-frequency circuit for realizing IF process；
Radio circuit for realizing radio frequency processing etc..
Alternatively, if transmit-receive sharing common antenna, it may also include duplexer etc..
In some possible implementations, above-mentioned application specific processor is integrated with general processor；Another In a little possible implementations, above-mentioned intermediate-frequency circuit and radio circuit are integrated with above-mentioned application specific processor.
Wherein, process circuit 901, for performing following processing：
The first dormancy notice is produced, and the first dormancy notice is placed on the first channel, is sent out by antenna 902 See off；Wherein, the first dormancy notifies to indicate that STA will enter energy-saving mode, and the first channel is the first AP Working channel；
Claim frame is produced, and the claim frame of generation is placed on second channel, is sent by antenna 902； Wherein, claim frame indicates that STA requests are associated with the 2nd AP, and second channel is the 2nd AP working channel, First channel is different with second channel；
After the first dormancy notice is sent, by antenna 902, received with second channel from the 2nd AP's Acknowledgement frame, acknowledgement frame indicates that the 2nd AP agrees to that STA is associated with the 2nd AP；
After the first dormancy notice is sent, by antenna 902, the first AP cachings are received with the first channel STA data frame.
Alternatively, process circuit 901, are additionally operable to before with the first channel received data frame, according to intercepting Interval, the beacon frame from the first AP is received by antenna 902 with the first channel；Wherein, beacon frame bag Include indicate the first AP cached STA data frame flag bit, process circuit 901, specifically for：Base Flag bit in beacon frame, by antenna 902 with the first channel received data frame.
Alternatively, process circuit 901, are additionally operable to after the first dormancy notice is sent, by antenna 902, Active notify is sent to the first AP with the first channel；It is active to notify to indicate that STA enter active mode；Place Circuit 901 is managed, specifically for：After active notify is sent, data frame is received.
Alternatively, process circuit 901, are additionally operable to：After with the first channel received data frame, pass through day Line 902, sends to the first AP and removes disassociation frame.
Alternatively, process circuit 901, are additionally operable to：After acknowledgement frame is received with second channel, with first Before channel received data frame, in addition to：By antenna 902, the is sent to the 2nd AP with second channel Two dormancy notify that the second dormancy notifies to indicate that STA will enter energy-saving mode.
Other optional implementations of the STA refer to the realization of STA in Fig. 2~Fig. 6.
The structural representation for the first AP that Figure 10 provides for embodiments herein.As illustrated, should AP includes：
First receiving module 1002a, for receiving data frame, information (such as at STA：Claim frame etc.) Deng；
Second receiving module 1002b, for from receive information at the network equipments such as router, other AP, Data frame etc.；
First sending module 1001a, for sending data frame, information (such as to STA：Response frame etc.) Deng；
Second sending module 1001b, for sending information, number to network equipments such as router, other AP According to frame etc.；
Processing module 1003, control and/or processing operation for performing AP etc..
In the first optional scheme, the AP is the first AP at least one AP, wherein：
First receiving module 1002a, is notified for receiving the dormancy from site STA with the first channel, the One channel is the first AP working channel；
Processing module 1003, for being notified to determine that STA will enter energy-saving mode according to dormancy；
Second receiving module 1002b, the data frame for receiving STA；
Processing module 1003, for it is determined that STA will enter energy-saving mode after, cache the second receiving module The data frame for the STA that 1002b is received；
Second receiving module 1002b, is additionally operable to receive the use of the 2nd AP in above-mentioned at least two AP Request is obtained in the data frame for the data frame for obtaining STA；
Second sending module 1001b, is asked for being obtained in response to data frame, and STA data frame is sent To the 2nd AP.
In the first optional scheme, the first AP other optional implementations are referred in Fig. 7 AP101 realization.Wherein, the second sending module 1001b is used to perform AP101 to AP102 transmission numbers Operated according to the transmission of frame, the first receiving module 1002a is used for AP101 from STA103 and/or other STA Receive information, data frame etc., the second receiving module 1002b are used for AP101 from router, other AP etc. Network equipment receive information, data frame etc., processing module 1003 are used for the processing operation for performing AP101.
In second of optional scheme, the AP is the 2nd AP at least two AP, wherein：
First receiving module 1002a, for receiving the claim frame that STA is sent, second channel with second channel Different from the first channel, the first channel is the first AP associated before STA is roamed working channel；Request Frame includes the first AP identification information and the instruction letter different from second channel for indicating the first channel Breath；
Processing module 1003, for determining that STA will be associated with the 2nd AP according to claim frame, according to first AP identification information determines the first AP, and determines that the first channel is different from second channel according to configured information；
Second sending module 1001b, for determining that the 2nd AP can be closed with STA in processing module 1003 After connection, the first AP into above-mentioned at least two AP is sent for obtaining the STA cached on the first AP Data frame data frame obtain request；
Second receiving module 1002b, the STA of request transmission is obtained for receiving the first AP in response to data frame Data frame；
First sending module 1001a, for after processing module 1003 determines to associate with STA, ringing Should be in claim frame to STA transmission acknowledgement frames, and after acknowledgement frame is sent, received with second channel by second Module 1002b from the first AP STA received data frame are sent to STA.
In second of optional scheme, the 2nd AP other optional implementations are referred in Fig. 7 AP102 realization.Wherein, the first sending module 1001a is used to perform AP102 to STA103 transmission numbers According to the operation of frame and/or information, the first receiving module 1002a be used for AP102 from STA103 and/or other STA receive informations, data frame etc., the second sending module 1001b are sent out for performing AP102 to AP101 Data frame is sent to obtain the transmission operation of the information such as request or data frame, the second receiving module 1002b is used for AP102 is from network equipment receive information, the data frames such as router, other AP etc., processing module 1003 Processing for performing AP102 is operated.
The structural representation for second of AP that Figure 11 provides for embodiments herein.As illustrated, should AP includes：
The pair of process circuit 1101, one or multiple antenna 1102, and network transceivers 1103.
Wherein, transmitting-receiving can share common antenna 1102, or antenna 1102 may include transmission antenna and reception Antenna, transmission antenna is used for the information for producing process circuit 1101 and/or data frame is sent, and receives Antenna is used for receive information and/or data frame, and the information received and/or data frame are given into process circuit 1101。
Wherein, process circuit 1101 may include the circuit being located on one or more chip, alternatively, also It may include other circuits being located on PCB.
Such as：Process circuit 1101 may include：
The general processor of general processing function for realizing；
Application specific processor for realizing wireless LAN communication protocol processes function, such as：DSP；And
Intermediate-frequency circuit for realizing IF process；
Radio circuit for realizing radio frequency processing etc..
Alternatively, if transmit-receive sharing common antenna, it may also include duplexer etc..
In some possible implementations, above-mentioned application specific processor is integrated with general processor；Another In a little possible implementations, above-mentioned intermediate-frequency circuit and radio circuit are integrated with above-mentioned application specific processor.
Network transceivers 1103, for being communicated with the network equipment such as other AP, router, such as connect Receive and dispatch to STA data frame, information etc., for another example：Enter transmitting-receiving of row information etc. with other AP.
In some possible implementations, network transceivers 1103 can be by process circuit 1101 and antenna 1102 realize.That is the first AP uses identical when with the network device communications such as STA and other AP Transceiver channel and antenna.
In the first optional scheme, the AP is the first AP at least two AP；Process circuit 1101, for performing following processing：
By antenna 1102, the dormancy from STA is received with the first channel and notified, the first channel is first AP working channel；
Notified to determine that STA will access energy-saving mode according to dormancy；
By network transceivers 1103, STA data frame is received；
Cache the STA received data frame；
By network transceivers 1103, receive the 2nd AP in above-mentioned at least two AP be used for obtain Take the data frame of STA data frame to obtain request, and request is obtained in response to data frame, by STA evidence Frame is sent to the 2nd AP.
In the first optional scheme, the first AP other optional implementations are referred in Fig. 7 AP101 realization.
In second of optional scheme, the AP is the 2nd AP at least two AP；Process circuit 1101, for performing following processing：
By antenna 1102, the claim frame that STA is sent, second channel and the first letter are received with second channel Road is different, and the first channel is the work that STA roams the first AP in preceding associated above-mentioned at least two AP Make channel；Claim frame includes the first AP identification information and for indicating the first channel and second channel Different configured informations；
Determine that STA will be associated with the 2nd AP according to claim frame, is determined according to the first AP identification information One AP, and determine that the first channel is different from second channel according to configured information；
After it is determined that the 2nd AP can associate with STA, by network transceivers 1503, sent out to the first AP The data frame of the data frame for obtaining the STA cached on the first AP is sent to obtain request, and receive first AP obtains the data frame for the STA for asking to send in response to data frame；
After it is determined that can be associated with STA, in response to claim frame, send true to STA by antenna 1502 Recognize frame, and after acknowledgement frame is sent, STA will be sent to from the first AP STA received data frame.
In second of optional scheme, the 2nd AP other optional implementations are referred in Fig. 7 AP102 realization.

Claims (22)

1. a kind of site STA, it is characterised in that including：
Sending module, is notified, described for sending the first dormancy to the first access point AP with the first channel One dormancy notifies the instruction STA to enter energy-saving mode, and first channel is the work of the first AP Make channel；
The sending module, is additionally operable to send claim frame to the 2nd AP with second channel, the claim frame refers to Show that the STA requests are associated with the 2nd AP, the second channel is believed for the work of the 2nd AP Road, first channel is different with the second channel；
Receiving module, for after the sending module sends the first dormancy notice, with the described second letter Road receives the acknowledgement frame from the 2nd AP, and the acknowledgement frame indicates that the 2nd AP agrees to the STA Associated with the 2nd AP；
The receiving module, is additionally operable to after the sending module sends the first dormancy notice, with institute State the data frame that the first channel receives the STA of the first AP cachings.
2. STA as claimed in claim 1, it is characterised in that
The receiving module, is additionally operable to before the data frame is received with first channel, according to intercepting Interval, the beacon frame from the first AP is received with first channel；
The beacon frame includes the flag bit for indicating the data frame that the first AP has cached the STA, institute Receiving module is stated, specifically for：Based on the flag bit in the beacon frame, institute is received with first channel State data frame.
3. STA as claimed in claim 1 or 2, it is characterised in that
The sending module, is additionally operable to sending after first dormancy notifies, with first channel to institute State the first AP and send active notify；The active notice indicates that the STA will enter active mode；
The receiving module specifically for：After the sending module sends the active notice, with described First channel receives the data frame.
4. the STA as described in any one of claims 1 to 3, it is characterised in that the sending module, also For：After the receiving module receives the data frame with first channel, with first channel Sent to the first AP and remove disassociation frame.
5. the STA as described in any one of Claims 1 to 4, it is characterised in that the sending module, also For：
After the receiving module receives the acknowledgement frame with the second channel, connect with first channel Receive before the data frame, the second dormancy is sent to the 2nd AP with the second channel and notified, it is described Second dormancy notifies to indicate that the STA will enter energy-saving mode.
6. a kind of site STA, it is characterised in that including：Process circuit and antenna, wherein, the place Reason circuit is used to perform following operation：
The first dormancy notice is generated, and the is sent to the first access point AP with the first channel by the antenna One dormancy notifies that first dormancy notifies to indicate that the STA will enter energy-saving mode, first channel For the working channel of the first AP；
Claim frame is generated, and the claim frame, institute are sent to the 2nd AP with second channel by the antenna State claim frame and indicate that the STA requests are associated with the 2nd AP, the second channel is described second AP working channel, first channel is different with the second channel；
After the first dormancy notice is sent, received by the antenna with the second channel from described 2nd AP acknowledgement frame, the acknowledgement frame indicates that the 2nd AP agrees to the STA and described second AP is associated；
Sending after first dormancy notifies, described the is received with first channel by the antenna The STA of one AP cachings data frame.
7. STA as claimed in claim 6, it is characterised in that
The process circuit, is additionally operable to before the data frame is received with first channel, according to intercepting Interval, the beacon frame from the first AP is received by the antenna with first channel；
The process circuit by with first channel receive the data frame when, specifically for：
The beacon frame includes the flag bit for indicating the data frame that the first AP has cached the STA, base Flag bit in the beacon frame, receives the data frame.
8. STA as claimed in claims 6 or 7, it is characterised in that
The process circuit, is additionally operable to after the first dormancy notice is sent, by the antenna with described First channel sends active notify to the first AP；The active notice indicates that the STA will enter and lived Jump pattern；
The process circuit with first channel receive the data frame when, specifically for：
After the active notice is sent, the data frame is received.
9. the STA as described in any one of claim 6~8, it is characterised in that the process circuit, also For after the data frame is received with first channel, in addition to：
Sent by the antenna with first channel to the first AP and remove disassociation frame.
10. the STA as described in any one of claim 6~9, it is characterised in that the process circuit, also For after the acknowledgement frame is received with the second channel, the data frame to be received with first channel Before, the second dormancy is sent to the 2nd AP by the antenna with the second channel to notify, it is described Second dormancy notifies to indicate that the STA will enter energy-saving mode.
11. a kind of access point AP, the AP are the first AP at least one AP, it is characterised in that First AP includes：
First receiving module, is notified for receiving the dormancy from the first site STA with the first channel, described First channel is the working channel of the first AP；
Processing module, for being notified to determine that the first STA will enter energy-saving mode according to the dormancy；
Second receiving module, the data frame of the first STA is sent to for receiving；
The processing module, for after it is determined that the first STA will enter energy-saving mode, caching described the What two receiving modules were received is sent to the data frame of the first STA；
Second receiving module, is additionally operable to receive the use of the 2nd AP at least one described AP Request is obtained in the first data frame of the data frame for obtaining the first STA；
Second sending module, is asked for being obtained in response to first data frame, by the first STA Data frame be sent to the 2nd AP.
12. the first AP as claimed in claim 11, it is characterised in that
First receiving module, is additionally operable to receive the claim frame that the 2nd STA is sent with the 3rd channel, 3rd channel is different from the 4th channel, and the 4th channel is associated before the 2nd STA is roamed The working channel of the 3rd AP at least one described AP；The claim frame includes the 3rd AP Identification information and the configured information different from the 4th channel for indicating the 3rd channel；
The processing module, is additionally operable to：Determine that the 2nd STA will be with described first according to the claim frame AP is associated, and determines the 3rd AP according to the identification information of the 3rd AP, and indicate according to described Information determines that the 3rd channel is different from the 4th channel；
Second sending module, be additionally operable to the processing module determine the first AP can with it is described After 2nd STA associations, sent to the 3rd AP for obtaining cached on the 3rd AP described the Second data frame of two STA data frame obtains request；
Second receiving module, is additionally operable to reception the 3rd AP and is obtained in response to second data frame Ask the data frame of the 2nd STA sent；
First AP also includes the first sending module, and being additionally operable to can be with institute in processing module determination State after the 2nd STA associations, in response to the claim frame, sent out with the 3rd channel to the 2nd STA Send acknowledgement frame；
First sending module, is additionally operable to after the acknowledgement frame is sent, with the 3rd channel by institute The data frame for stating the second receiving module from the 3rd AP the 2nd STA received is sent to described second STA。
13. a kind of access point AP, the AP are the first AP at least one AP, it is characterised in that First AP includes：Process circuit, antenna and network transceivers, the process circuit are used to perform such as Lower operation：
The dormancy from the first site STA is received by the antenna with the first channel to notify, first letter Road is the working channel of the first AP；
Notified to determine that the first STA will enter energy-saving mode according to the dormancy；
The data frame for being sent to the first STA is received by the network transceivers；
It is determined that the first STA will enter energy-saving mode after, cache receive be sent to the first STA Data frame；
By twoth AP of the network transceivers reception at least one described AP for obtaining First data frame of the data frame of the first STA obtains request；
Obtain and ask in response to first data frame, by the network transceivers by the first STA Data frame be sent to the 2nd AP.
14. the first AP as claimed in claim 13, it is characterised in that the process circuit, is additionally operable to Perform following operation：
The claim frame that 2nd STA is sent, the 3rd channel are received with the 3rd channel by the antenna It is different from the 4th channel, the 4th channel be before the 2nd STA is roamed it is associated it is described at least one The working channel of the 3rd AP in AP；The claim frame include the 3rd AP identification information and The configured information different from the 4th channel for indicating the 3rd channel；
Determine that the 2nd STA will be associated with the first AP according to the claim frame, according to the described 3rd AP identification information determines the 3rd AP, and according to the configured information determine the 3rd channel with 4th channel is different；
After it is determined that the first AP can associate with the 2nd STA, by the network transceivers to 3rd AP sends of the data frame for obtaining the 2nd STA cached on the 3rd AP Two data frames obtain request；
The 3rd AP is received in response to second data frame acquisition request hair by the network transceivers The 2nd STA sent data frame；
After it is determined that can be associated with the 2nd STA, in response to the claim frame, by the antenna with 3rd channel sends acknowledgement frame to the 2nd STA；
, will be from the 3rd AP with the 3rd channel by the antenna after the acknowledgement frame is sent The 2nd STA received data frame is sent to the 2nd STA.
15. a kind of transmission method of data frame, it is characterised in that including：
Site STA sends the first dormancy to the first access point AP with the first channel and notified, first dormancy Notify to indicate that the STA will enter energy-saving mode, first channel is the working channel of the first AP；
The STA sends claim frame with second channel to the 2nd AP, and the claim frame indicates the STA Request is associated with the 2nd AP, the second channel for the 2nd AP working channel, described the One channel is different with the second channel；
After the first dormancy notice is sent, the STA is received with the second channel and is come from described second AP acknowledgement frame, the acknowledgement frame indicates that the 2nd AP agrees to that the STA and the 2nd AP is closed Connection；
After the first dormancy notice is sent, the STA receives described first with first channel The STA of AP cachings data frame.
16. method as claimed in claim 15, it is characterised in that
Before the STA receives the data frame with first channel, in addition to：The STA roots According to listening interval, the beacon frame from the first AP is received with first channel；
The STA receives the data frame with first channel, including：
The beacon frame includes the flag bit for indicating the data frame that the first AP has cached the STA, institute STA is stated based on the flag bit in the beacon frame, the data frame is received with first channel.
17. the method as described in claim 15 or 16, it is characterised in that
After the first dormancy notice is sent, in addition to：The STA is with first channel to described One AP sends active notify；The active notice indicates that the STA will enter active mode；
The STA receives the data frame with first channel, including：
The STA receives the data frame after the active notice is sent.
18. the method as described in any one of claim 15~17, it is characterised in that the STA with First channel is received after the data frame, in addition to：
The STA is sent to the first AP with first channel and removes disassociation frame.
19. the method as described in any one of claim 15~18, it is characterised in that the STA with The second channel is received after the acknowledgement frame, and the STA receives the data frame with first channel Before, in addition to：
The STA sends the second dormancy to the 2nd AP with the second channel and notifies that described second stops Sleep and notify to indicate that the STA will enter energy-saving mode.
20. a kind of transmission method of data frame, it is characterised in that including：
Site STA sends dormancy to the first access point AP with the first channel and notified, the dormancy notifies to indicate The STA will enter energy-saving mode, and first channel is the working channel of the first AP；
The STA sends claim frame with second channel to the 2nd AP, and the claim frame indicates the STA Request is associated with the 2nd AP, the second channel for the 2nd AP working channel, described the One channel is different with the second channel；The claim frame include the first AP identification information and The configured information different from the second channel for indicating first channel；
After the dormancy notice is sent, the STA is received with the second channel and is come from the 2nd AP Acknowledgement frame, the acknowledgement frame indicates that the 2nd AP agrees to that the STA is associated with the 2nd AP；
The STA received with the second channel at the 2nd AP the first AP receive it is described The data frame for the STA that dormancy is cached after notifying.
21. a kind of data transmission method, it is characterised in that including：
First access point AP receives the dormancy from the first site STA with the first channel and notified, and described first Channel is the working channel of the first AP；
First AP notifies to determine that the first STA will enter energy-saving mode according to the dormancy；
The data frame for the first STA that the first AP cachings are received；
First AP receives first of the data frame for obtaining the first STA from the 2nd AP Data frame obtains request；
First AP is obtained in response to first data frame and asked, by the data frame of the first STA It is sent to the 2nd AP.
22. method as claimed in claim 21, it is characterised in that also include：
First AP receives the claim frame that the 2nd STA is sent, the 3rd channel with the 3rd channel Different from the 4th channel, the 4th channel is the 3rd AP associated before the 2nd STA is roamed work Make channel；The claim frame includes the identification information of the 3rd AP and for indicating the 3rd letter The road configured information different from the 4th channel；
First AP determines that the 2nd STA will be associated with the first AP according to the claim frame, 3rd AP is determined according to the identification information of the 3rd AP, and institute is determined according to the configured information State the 3rd channel different from the 4th channel；
First AP sends to the 3rd AP and used after it is determined that can be associated with the 2nd STA Request is obtained in the second data frame of the data frame for obtaining the 2nd STA cached on the 3rd AP, And receive the number that the 3rd AP obtains the 2nd STA for asking to send in response to second data frame According to frame；
First AP with the 2nd STA after it is determined that can associate, in response to the claim frame, with 3rd channel sends acknowledgement frame to the 2nd STA；
First AP, will be from the 3rd AP with the 3rd channel after the acknowledgement frame is sent The 2nd STA received data frame is sent to the 2nd STA.
CN201610232179.2A 2016-04-14 2016-04-14 The transmission method and equipment of a kind of data frame Pending CN107302774A (en)

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