CN102843221B - Method and device for processing in initialization of MU TXOP (memory unit-symmetric transmission opportunity) - Google Patents
Method and device for processing in initialization of MU TXOP (memory unit-symmetric transmission opportunity) Download PDFInfo
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- CN102843221B CN102843221B CN201110174202.4A CN201110174202A CN102843221B CN 102843221 B CN102843221 B CN 102843221B CN 201110174202 A CN201110174202 A CN 201110174202A CN 102843221 B CN102843221 B CN 102843221B
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Abstract
The invention provides a method and a device for processing in initialization of an MU TXOP (memory unit-symmetric transmission opportunity). The method comprises the steps of: transmitting data frames for initialization of the MU TXOP to at least two receiving ends, so that response frames corresponding to the data frames are returned by the receiving ends, wherein the receiving ends at least comprise a receiving end with an AC (automatic controller) of main access category; transmitting a response request frame to a receiving end with no needs for immediate return of a response frame, so that a response frame corresponding to the data frame is returned by the receiving end with no needs for immediate return of the response frame after the response request frame is received; and if a response frame transmitted by any receiving end with the main AC is detected successfully, the initialization of the MU TXOP can be determined to be successful. By adopting the method and the device provided by the embodiment of the invention, waste of the MU TXOP can be avoided, and the efficiency of transmission can be improved.
Description
Technical field
The present invention relates to wireless communication technology, processing method when particularly relating to a kind of initialization multi-user transmission chance (Multi-User TXOP, MU TXOP) and equipment.
Background technology
In enhancing distributed channel access (Enhanced Distributed ChannelAccess, EDCA) mechanism of WLAN (wireless local area network), can the service quality of tenaculum priority.EDCA comprises 4 kinds of access categories (Access Category, AC).Every class AC has different access priorities, and the AC that priority is high frequently can obtain channel access power.Website just obtains a transmission opportunity (Transmission Opportunity in competition after channel access power, TXOP), can multiple Frame, control frame and management frames be transmitted and receive response frame within a certain period of time a user or multiple user.In single user transmission opportunity (Single-User TXOP, SU TXOP), transmitting terminal website can only transmit the data of the AC belonging to access channel.
In MU TXOP, allow multiple AC to share same TXOP, wherein, the AC obtaining channel access power is called main AC (Primary AC), and the AC sharing TXOP with main AC is called time AC (secondary AC).In a MU TXOP, the main AC of a class can only be had, multiclass time AC can be had.In existing EDCA fallback mechanism, after transmitting terminal website competes channel access power, can send a short frame initialization TXOP, this short frame can be control frame or Frame.If correctly do not receive the response frame of this frame within a certain period of time, then transmitting terminal website is by double for the competition window of its main AC, and the competition window of secondary AC remains unchanged, and starts random back off procedure simultaneously, again competitive channel access right.
As access point (Access Point, AP) use MU MIMO Frame initialization MU TXOP time and have two or more targeted customer's website (Station, STA) when data have similar AC and are main AC, the STA response frame that first has main AC if correctly do not receive, conventionally, AP determines initialization failure, and AP is by double for the competition window of its main AC and start random back off procedure afterwards.But, because AP obtains channel access power based on main AC, this for be equally main AC other STA be inequitable, also may cause the waste of TXOP simultaneously, reduce efficiency of transmission.
Summary of the invention
The processing method when embodiment of the present invention is to provide a kind of initialization MU TXOP and equipment, avoid the waste of TXOP and improve efficiency of transmission.
Embodiments provide processing method during a kind of initialization MU TXOP, comprising:
Send the Frame being used for initialization MU TXOP to the receiving terminals of at least two, make described receiving terminal reply corresponding response frame to described Frame, in the receiving terminal of described at least two, at least comprise the receiving terminal with main access category AC;
To not requiring that the receiving terminal of replying response frame immediately sends response request frame, described in making, do not require that the receiving terminal of replying response frame immediately replys corresponding response frame to described Frame after receiving described response request frame;
If successfully detect the response frame that arbitrary receiving terminal with described main AC sends, then determine MUTXOP initialization success.
The embodiment of the present invention provides treatment facility during a kind of initialization MU TXOP, comprising:
Dataframe device, the Frame being used for initialization MU TXOP is sent for the receiving terminal at least two, make described receiving terminal reply corresponding response frame to described Frame, in the receiving terminal of described at least two, at least comprise the receiving terminal with main access category AC;
Control frame transmitter, for not requiring that the receiving terminal of replying response frame immediately sends response request frame, does not require described in making that the receiving terminal of replying response frame immediately replys corresponding response frame to described Frame after receiving described response request frame;
Processor, if for successfully detecting the response frame that arbitrary receiving terminal with described main AC sends, then determine MU TXOP initialization success.
As shown from the above technical solution, the embodiment of the present invention at arbitrary response frame with the receiving terminal of main AC after being successfully detected, then determine MU TXOP initialization success, and be not limited to only have first receiving terminal success response just to show initialization success, each receiving terminal with main AC is made to obtain the chance of identical reply response frame, and then TXOP can be obtained when arbitrary response frame with the receiving terminal of main AC is successfully detected to transmit data, the fairness had between the receiving terminal of main AC can be ensured, and increase the success rate of TXOP, and raising efficiency of transmission.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the method flow schematic diagram of first embodiment of the invention;
Fig. 2 is the method flow schematic diagram of second embodiment of the invention;
Fig. 3 is signal schematic representation corresponding to second embodiment of the invention;
Fig. 4 is the method flow schematic diagram of third embodiment of the invention;
Fig. 5 is signal schematic representation corresponding to second embodiment of the invention;
Fig. 6 is the method flow schematic diagram of fourth embodiment of the invention;
Fig. 7 is signal schematic representation corresponding to fifth embodiment of the invention;
Fig. 8 is the method flow schematic diagram of fifth embodiment of the invention;
Fig. 9 is signal schematic representation corresponding to fifth embodiment of the invention;
Figure 10 is the method flow schematic diagram of sixth embodiment of the invention;
Figure 11 is signal schematic representation corresponding to sixth embodiment of the invention;
Figure 12 is the device structure schematic diagram of seventh embodiment of the invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.
Fig. 1 is the method flow schematic diagram of first embodiment of the invention, comprising:
Step 11: transmitting terminal sends to the receiving terminal of at least two Frame being used for initialization MU TXOP, and make described receiving terminal reply corresponding response frame to described Frame, the receiving terminal of described at least two comprises: the receiving terminal with main AC of at least one.
Wherein, transmitting terminal is the website of competition to channel.Be AP with transmitting terminal in the embodiment of the present invention, receiving terminal is STA is example.
System corresponding to the embodiment of the present invention comprises a transmitting terminal and multiple receiving terminal.Further, in order to realize transmitting terminal simultaneously to multiple receiving terminal transmission data, the form of MU can be used, now, being transmitting terminal and using the form of MU to send the Frame for initialization MU TXOP to the receiving terminal of at least two.The form of MU for the form for realizing space division multiplexing, namely can make the data of multiple receiving terminal send in time domain simultaneously, but being separated on spatial domain, so that each receiving terminal can detect the data of oneself.
At least comprise the receiving terminal with main AC in the receiving terminal of above-mentioned at least two, such as, receiving terminal can be all the receiving terminal with main AC, also can comprise the receiving terminal with main AC and the receiving terminal with secondary AC.
Receiving terminal can be replied Frame after receiving Frame, sends corresponding response frame to transmitting terminal, so that transmitting terminal determines that whether MU TXOP initialization is successful.
Wherein, according to protocol requirement, transmitting terminal can determine which receiving terminal is that requirement replys response frame immediately, which receiving terminal does not require to reply response frame immediately.Above-mentionedly can simply be described as requiring replying immediately, or do not require to reply immediately.Afterwards, whether transmitting terminal can require being used to indicate that the mark of replying response frame is immediately carried and send to receiving terminal in a data frame, and receiving terminal can be replied immediately after this mark being detected, or does not reply immediately.Such as, the first receiving terminal is the receiving terminal that response frame is replied in requirement immediately, then the first receiving terminal then replys response frame after receiving Frame; Again such as, the second receiving terminal is the receiving terminal not requiring to reply immediately response frame, then, after the second receiving terminal receives Frame, reply response frame again after also needing to receive response request frame again.Usually, in order to avoid the conflict of response frame, in receiving terminal, there is at most a receiving terminal to be the receiving terminal that response frame is replied in requirement immediately.
Step 12: transmitting terminal is to not requiring that the receiving terminal of replying response frame immediately sends response request frame;
Particularly, transmitting terminal can to not requiring to reply the whole receiving terminal in the receiving terminal of response frame or part receiving terminal transmission response request frame immediately.
Wherein, above-mentioned whole receiving terminals can comprise: have the receiving terminal of main AC and have the receiving terminal of secondary AC.Above-mentioned part receiving terminal can comprise: the receiving terminal with main AC.
Above-mentioned response request frame can be specially block and confirm request (Block AcknowledgmentRequest, BAR).
Step 13: if transmitting terminal successfully detects the response frame that arbitrary receiving terminal with described main AC sends, then determine MU TXOP initialization success.
Such as, if the receiving terminal arbitrary with main AC has correctly been replied response frame and has been sent out end unsuccessful demodulation, can determine MU TXOP initialization success.
Above-mentioned response frame can be specially block and confirm (Block Acknowledgement, BA).
Above-mentioned flow process of carrying out detecting can specifically comprise: transmitting terminal, after the BA first receiving terminal with main AC successfully not detected, can send BAR until successfully detect the BA of one of them receiving terminal to other the receiving terminal with main AC successively.Such as, transmitting terminal detects channel idle point (coordination function) frame pitch (Point (coordination function) InterframeSpace after data frame transfer completes, PIFS) receiving terminal having main AC to one of them after the time sends BAR, if successfully detect the BA that this receiving terminal is replied, then determine MU TXOP initialization success.If successfully do not detect this receiving terminal correctly reply BA, then transmitting terminal detects that after completing to this receiving terminal transmission BAR the channel idle PIFS time has the receiving terminal transmission BAR of main AC again to another, the like, until successfully detect the BA that has the receiving terminal reply of main AC.If the BA all with the receiving terminal of main AC is not all successfully detected, then determine MU TXOP initialization failure.
The present embodiment is arbitrary has the response frame of the receiving terminal of main AC after being successfully detected, then determine MUTXOP initialization success, and be not limited to only have first receiving terminal success response just to show initialization success, each receiving terminal with main AC is made to obtain the chance of identical reply response frame, and then TXOP can be obtained when arbitrary response frame with the receiving terminal of main AC is successfully detected to transmit data, the fairness had between the receiving terminal of main AC can be ensured, and increase the success rate of TXOP, and improve efficiency of transmission.
Fig. 2 is the method flow schematic diagram of second embodiment of the invention, and Fig. 3 is signal schematic representation corresponding to second embodiment of the invention.See Fig. 2, the present embodiment comprises:
Step 21:AP sends Frame to the STA of at least two, and this Frame is used for initialization MUTXOP.
Such as, be 4 see Fig. 3, STA, be respectively STA ~ 1, STA ~ 2, STA ~ 3 and STA ~ 4, wherein, STA ~ 1 and STA ~ 2 have identical AC classification and are AC-VI, and the AC classification that STA ~ 3 have is the AC classification that AC_VO, STA ~ 4 have is AC_BE.Suppose that main AC is AC_VI, requiring that the STA confirmed immediately can confirm according to protocol requirement, is such as STA ~ 1 in the present embodiment.
Step 22: if BA is not correctly replied in STA ~ 1, then AP sends BAR to STA ~ 2 after the channel idle PIFS time being detected.
Wherein, AP is when usage data frame initialization MU TXOP, and the STA that this requirement confirms immediately correctly can not receive data for some reason and correctly can not reply BA.The bandwidth of such as this Frame may be greater than the available bandwidth of the STA that requirement confirms immediately, or STA place signal to noise ratio is too low.
Such as, see Fig. 3, within the BATimeOut time, BA is not correctly replied in STA ~ 1, then AP sends BAR to STA ~ 2 after the PIFS time after data frame transfer completes.Wherein, by Channel Detection, AP can judge whether STA ~ 1 correctly replys BA, if detect that within the BATimeOut time signal strength signal intensity is lower than clear channel assessment (CCA) (Clear Channel Assessment, CCA) threshold value, shows that BA is not correctly replied in STA ~ 1 within the BATimeOut time.
Step 23: if BA is correctly replied in STA ~ 2 within the SIFS time, and this BA of AP unsuccessful demodulation, then AP determines TXOP initialization success.
Such as, if AP detects signal and to this signal cycle verification succeeds within the SIFS time, then show STA ~ 2 within the SIFS time correct reply BA and success by AP demodulation.
After determining MU TXOP initialization success, then can adopt the operation after existing initialization success, such as, continue to send BAR to STA ~ 3 and STA ~ 4.The present embodiment is not by when the STA confirmed immediately correctly replys response frame, the STA continued to having main AC equally sends BAR, and after receiving corresponding BA, determine MU TXOP initialization success, and then this TXOP can be utilized to transmit data, the fairness had between the STA of main AC can be ensured, and improve MU TXOP success rate and improve data transmission efficiency.
Fig. 4 is the method flow schematic diagram of third embodiment of the invention, and Fig. 5 is signal schematic representation corresponding to second embodiment of the invention.With the second embodiment unlike, the STA in the present embodiment with main AC does not all correctly reply, and now will perform back off procedure.See Fig. 4, the present embodiment comprises:
Step 41:AP sends Frame to the STA of at least two, and this Frame is used for initialization MUTXOP.
Step 42: if BA is not correctly replied in STA ~ 1, then AP sends BAR to STA ~ 2 after the channel idle PIFS time being detected.
The particular content of above-mentioned steps 41 ~ 42 can see step 21 ~ 22.
Step 43: if BA is not correctly replied in STA ~ 2, then AP carries out rollback to main AC.
Such as, see Fig. 5, in the BATimeOut time after completing to STA ~ 2 transmission BAR, BA is not correctly replied in STA ~ 2, then can determine MU TXOP initialization failure, now, will carry out rollback (Backoff) to main AC.Wherein, by Channel Detection, AP can judge whether STA ~ 2 are correctly replied BA and whether received signal, if detect that signal strength signal intensity is lower than CCA threshold value in the BATimeOut time after completing to STA ~ 2 transmission BAR, show that BA is not correctly replied in STA ~ 2 within the BATimeOut time.
Such as, AP, by constant for competition window that is double for the competition window of main AC and maintenance time AC, starts random back off procedure, again competitive channel access right simultaneously.Concrete rollback flow process can comprise:
If described Frame is short frame, then often sending once described Frame then increases by 1 to service quality short retry counter (QoS Short Retry Conter, QSRC) [AC]; If described QSRC [AC] reaches short frame retry threshold (dot11ShortRetryLimit), then the competition window (CW [AC]) to main AC is set to window minimum (CWmin [AC]); If described QSRC [AC] does not reach short frame retry threshold, if then the current competitive window (CW [AC]) of described main AC is less than window maximum (CWmax [AC]), following value is updated to: (CW [AC]+1) * 2-1 by the competition window of main AC, wherein, CW [AC] is the current competitive window of main AC; If CW [AC] equals window maximum, remain unchanged to the competition window of main AC; Backoff timer is set to an integer of a Stochastic choice in a uniformly distributed manner within the scope of [0, CW [AC]] closed interval; Or,
If described Frame is long frame, then often sending once described Frame then increases by 1 to the long retryCounter of service quality (QoS Long Retry Conter, QLRC) [AC]; If described QLRC [AC] reaches long frame retry threshold (dot11LongRetryLimit), then the competition window of main AC will be set to window minimum (CWmin [AC]); If described QLRC [AC] does not reach long frame retry threshold, if then the current competitive window (CW [AC]) of described main AC is less than window maximum (CWmax [AC]), following value is updated to: (CW [AC]+1) * 2-1 by the competition window of main AC, wherein, CW [AC] is the current competitive window of main AC; If CW [AC] equals window maximum, remain unchanged to the competition window of main AC; Backoff timer is set to an integer of a Stochastic choice in a uniformly distributed manner within the scope of [0, CW [AC]] closed interval; .
Above-mentioned Frame belongs to long frame or short frame can be determined according to protocol requirement.
The present embodiment, by just determining MUTXOP initialization failure when all STA with main AC all correctly do not reply, can avoid the waste of TXOP.
Fig. 6 is the method flow schematic diagram of fourth embodiment of the invention, and Fig. 7 is signal schematic representation corresponding to fifth embodiment of the invention.Not successfully detecting BA with second, third embodiment unlike, the present embodiment is because AP does not have unsuccessful demodulation BA, but STA correctly replys BA.See Fig. 6, the present embodiment comprises:
Step 61:AP sends Frame to the STA of at least two, and this Frame is used for initialization MUTXOP.
Particular content can see step 21.
Step 62: if do not have the BA that unsuccessful demodulation STA ~ 1 is replied, then AP sends BAR to STA ~ 2 after the detection channel idle PIFS time.
In second and third embodiment, BA is not correctly replied in STA ~ 1, and namely BA is not replied in STA side.Such as, but in the present embodiment, correctly replied BA see Fig. 7, STA side, but AP does not have unsuccessful demodulation BA, cyclic check failure, then determine do not have unsuccessful demodulation BA.
Step 63: if BA is correctly replied in STA ~ 2 within the SIFS time, and the BA that AP unsuccessful demodulation STA ~ 2 are replied, then determine TXOP initialization success.
After determining MU TXOP initialization success, then can adopt the operation after existing initialization success, such as, continue to send BAR to STA ~ 3 and STA ~ 4.The present embodiment is not by when the STA confirmed immediately correctly replys response frame, the STA continued to having main AC equally sends BAR, and after receiving corresponding BA, determine MU TXOP initialization success, and then this TXOP can be utilized to transmit data, the fairness had between the STA of main AC can be ensured, and improve MU TXOP success rate and improve data transmission efficiency.
Fig. 8 is the method flow schematic diagram of fifth embodiment of the invention, and Fig. 9 is signal schematic representation corresponding to fifth embodiment of the invention.With the 4th embodiment unlike, do not have in the present embodiment unsuccessful demodulation have main AC STA reply BA, now will perform back off procedure.See Fig. 8, the present embodiment comprises:
Step 81:AP sends Frame to the STA of at least two, and this Frame is used for initialization MUTXOP.
Step 82: if do not have the BA that unsuccessful demodulation STA ~ 1 is replied, then AP sends BAR to STA ~ 2 after the detection channel idle PIFS time.
The content of step 81 ~ 82 can specifically see step 61 ~ 62.
Step 83: if do not have the BA that unsuccessful demodulation STA ~ 2 are replied, then AP carries out rollback to main AC.
Such as, correctly reply BA see Fig. 9, STA ~ 2, but the BA that AP does not have these STA ~ 2 of unsuccessful demodulation to reply, such as, cyclic check failure, then can determine MU TXOP initialization failure, now, will carry out rollback (Backoff) to main AC.Concrete rollback flow process can comprise:
If described Frame is short frame, then often sending once described Frame then increases by 1 to QSRC [AC]; If described QSRC [AC] reaches short frame retry threshold (dot11ShortRetryLimit), then the competition window (Contention Window, CW [AC]) to main AC is set to window minimum (CWmin [AC]); If described QSRC [AC] does not reach short frame retry threshold, if then the current competitive window (CW [AC]) of described main AC is less than window maximum (CWmax [AC]), following value is updated to: (CW [AC]+1) * 2-1 by the competition window of main AC, wherein, CW [AC] is the current competitive window of main AC; If CW [AC] equals window maximum, remain unchanged to the competition window of main AC; Backoff timer is set to an integer of a Stochastic choice in a uniformly distributed manner within the scope of [0, CW [AC]] closed interval; Or,
If described Frame is long frame, then often sending once described Frame then increases by 1 to QLRC [AC]; If described QLRC [AC] reaches long frame retry threshold (dot11LongRetryLimit), then the competition window of main AC will be set to window minimum (CWmin [AC]); If described QLRC [AC] does not reach long frame retry threshold, if then the current competitive window (CW [AC]) of described main AC is less than window maximum (CWmax [AC]), following value is updated to: (CW [AC]+1) * 2-1 by the competition window of main AC, wherein, CW [AC] is the current competitive window of main AC; If CW [AC] equals window maximum, remain unchanged to the competition window of main AC; Backoff timer is set to an integer of a Stochastic choice in a uniformly distributed manner within the scope of [0, CW [AC]] closed interval.
Above-mentioned Frame belongs to long frame or short frame can be determined according to protocol requirement.
Just determine MU TXOP initialization failure when the present embodiment is not all successfully detected by the BA replied at all STA with main AC, the waste of TXOP can be avoided.
Figure 10 is the method flow schematic diagram of sixth embodiment of the invention, and Figure 11 is signal schematic representation corresponding to sixth embodiment of the invention.Comprise:
Step 101: when successfully detection has the BA of the STA of main AC to AP, AP sends BAR to all STA with secondary AP successively.
Wherein, AP does not successfully detect has the BA of the STA of main AC, can be that STA does not correctly reply BA, also can be that STA correctly replys BA but AP does not have unsuccessful demodulation.And, when comprising multiple STA, can be that all STA all correctly do not reply BA, also can be that the BA that all STA correctly reply all is not successfully demodulated, also can be that part STA does not correctly reply BA, part STA correctly replys BA but AP does not have unsuccessful demodulation in addition.
Such as, when all correctly not replying BA see Figure 11, STA ~ 1 and STA ~ 2, AP sends BAR to STA ~ 3 after the interval PIFS time after the BAR sent to STA ~ 2 is transmitted.After STA ~ 3 reply BA completes, then send BAR to STA ~ 4 after the SIFS time.
In addition, the present embodiment sends BAR to the transmitting terminal with secondary AC again after the receiving terminal failure with main AC, also can be first to the receiving terminal transmission BAR with secondary AC, then to having the receiving terminal transmission BAR of main AC.
Step 102:AP performs rollback after sending BAR to all STA with secondary AC.
Wherein, no matter whether the STA with secondary AC correctly replys BA, AP after sending BAR to all STA with secondary AC, then performs fallback mechanism.Concrete rollback flow process can participate in the above-mentioned process main AC being carried out to rollback.
Step 103: for the STA with secondary AC being successfully detected BA, AP no longer sends identical data to it when next time competes after channel.
Such as, all correctly reply BA see Figure 11, STA ~ 3 and STA ~ 4, and by AP unsuccessful demodulation.Then AP is when competing channel next time, no longer sends these data sent to STA ~ 3 and STA ~ 4, and these data sent are this Frame for initialization MU TXOP.
The present embodiment STA continued to having secondary AC when MU TXOP initialization failure sends BAR, can be no longer that STA repeats to send identical data to correct reply after next AP competes channel, avoid the waste of the data of transmission.
Figure 12 is the device structure schematic diagram of seventh embodiment of the invention, and this equipment can for performing the equipment of said method in WLAN (wireless local area network), this equipment can be AP.This equipment 120 comprises dataframe device 121, control frame transmitter 122 and processor 123; Dataframe device 121 sends for the receiving terminal at least two Frame being used for initialization MU TXOP, described receiving terminal is made to reply corresponding response frame to described Frame, the receiving terminal with main AC is at least comprised in the receiving terminal of described at least two, such as, the form of MU is used to send above-mentioned Frame; Control frame transmitter 122 is for sending response request frame to the receiving terminal not requiring to reply immediately response frame, do not require described in making that the receiving terminal of replying response frame immediately replys corresponding response frame to described Frame after receiving described response request frame, such as, can be specifically to not requiring to reply the whole receiving terminal in the receiving terminal of response frame or part receiving terminal transmission response request frame immediately; If the response frame that processor 123 sends for successfully detecting arbitrary receiving terminal with described main AC, then determine MU TXOP initialization success.
In an embodiment, control frame transmitter 122 specifically for: do not require to reply immediately the receiving terminal in the receiving terminal of response frame with main AC send response request frame to described.
In an embodiment, described processor 123 also for: if described in there is the receiving terminal of main AC response frame be not all successfully detected, then rollback is carried out to main AC.
Particularly, described processor 123 specifically for:
If described Frame is short frame, then often sending once described Frame then increases by 1 to QSRC [AC]; If described QSRC [AC] reaches short frame retry threshold, be then set to window minimum by the competition window of main AC; If described QSRC [AC] does not reach short frame retry threshold, if then the current competitive window of described main AC is less than window maximum, following value is updated to: (CW [AC]+1) * 2-1 by the competition window of main AC, wherein, CW [AC] is the current competitive window of main AC; If CW [AC] equals window maximum, remain unchanged to the competition window of main AC; Backoff timer is set to an integer of a Stochastic choice in a uniformly distributed manner within the scope of [0, CW [AC]] closed interval.
Or, described processor 123 specifically for:
If described Frame is long frame, then often sending once described Frame then increases by 1 to QLRC [AC]; If described QLRC [AC] reaches long frame retry threshold, be then set to window minimum by the competition window of main AC; If described QLRC [AC] does not reach long frame retry threshold, if then the current competitive window of described main AC is less than window maximum, following value is updated to: (CW [AC]+1) * 2-1 by the competition window of main AC, wherein, CW [AC] is the current competitive window of main AC; If CW [AC] equals window maximum, remain unchanged to the competition window of main AC; Backoff timer is set to an integer of a Stochastic choice in a uniformly distributed manner within the scope of [0, CW [AC]] closed interval.
In an embodiment, described control frame transmitter 122 is specifically for sending response request frames to the whole receiving terminals not requiring to reply immediately in the receiving terminal of response frame; Described processor 123 also no longer sends identical data to the receiving terminal with secondary AC being successfully detected response frame after competing channel in next time.
The above-mentioned response frame with the receiving terminal of main AC is not successfully detected and can comprises: the receiving terminal with main AC does not correctly reply response frame; Or, the response frame that the receiving terminal not having unsuccessful demodulation to have main AC is correctly replied.
The mark being used to indicate and whether requiring to reply response frame immediately can be carried in above-mentioned Frame so that after described receiving terminal receives described Frame, according to described be identified at and do not need or need to receive response request frame time reply response frame.
The present embodiment at arbitrary response frame with the receiving terminal of main AC after being successfully detected, then determine MU TXOP initialization success, and be not limited to only have first receiving terminal success response just to show initialization success, each receiving terminal with main AC is made to obtain the chance of identical reply response frame, and then TXOP can be obtained when arbitrary response frame with the receiving terminal of main AC is successfully detected to transmit data, the fairness had between the receiving terminal of main AC can be ensured, and increase the success rate of TXOP, and improve efficiency of transmission.
Be understandable that, the correlated characteristic in said method and equipment can reference mutually.In addition, " first ", " second " in above-described embodiment etc. are for distinguishing each embodiment, and do not represent the quality of each embodiment.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in computer read/write memory medium, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (14)
1. processing method during initialization multi-user transmission chance MU TXOP, is characterized in that, comprising:
Send the Frame being used for initialization MU TXOP to the receiving terminals of at least two, make described receiving terminal reply corresponding response frame to described Frame, in the receiving terminal of described at least two, at least comprise the receiving terminal with main access category AC;
To not requiring that the receiving terminal of replying response frame immediately sends response request frame, described in making, do not require that the receiving terminal of replying response frame immediately replys corresponding response frame to described Frame after receiving described response request frame;
If successfully detect the response frame that arbitrary receiving terminal with described main AC sends, then determine MU TXOP initialization success.
2. method according to claim 1, is characterized in that, to not requiring that the receiving terminal of replying response frame immediately sends response request frame, comprising:
Do not require to reply immediately the receiving terminal in the receiving terminal of response frame with main AC send response request frame to described.
3. method according to claim 1, is characterized in that, also comprises:
If described in there is the receiving terminal of main AC response frame be not all successfully detected, then rollback is carried out to main AC.
4. method according to claim 3, is characterized in that, describedly carries out rollback to main AC, comprising:
If described Frame is short frame, then often sending once described Frame then increases by 1 to service quality short retry counter QSRC [AC]; If described QSRC [AC] reaches short frame retry threshold, be then set to window minimum by the competition window of main AC; If described QSRC [AC] does not reach short frame retry threshold, if then the current competitive window of described main AC is less than window maximum, following value is updated to: (CW [AC]+1) * 2-1 by the competition window of main AC, wherein, CW [AC] is the current competitive window of main AC; If CW [AC] equals window maximum, remain unchanged to the competition window of main AC; Backoff timer is set to an integer of a Stochastic choice in a uniformly distributed manner within the scope of [0, CW [AC]] closed interval.
5. method according to claim 3, is characterized in that, describedly carries out rollback to main AC, comprising:
If described Frame is long frame, then often sending once described Frame then increases by 1 to the long retryCounter QLRC [AC] of service quality; If described QLRC [AC] reaches long frame retry threshold, be then set to window minimum by the competition window of main AC; If described QLRC [AC] does not reach long frame retry threshold, if then the current competitive window of described main AC is less than window maximum, following value is updated to: (CW [AC]+1) * 2-1 by the competition window of main AC, wherein, CW [AC] is the current competitive window of main AC; If CW [AC] equals window maximum, remain unchanged to the competition window of main AC; Backoff timer is set to an integer of a Stochastic choice in a uniformly distributed manner within the scope of [0, CW [AC]] closed interval.
6. method according to claim 3, is characterized in that, the response frame with the receiving terminal of main AC is not successfully detected, and comprising:
The receiving terminal with main AC does not correctly reply response frame; Or,
The response frame that the receiving terminal not having unsuccessful demodulation to have main AC is correctly replied.
7. method according to claim 1, it is characterized in that, described to not requiring that the receiving terminal of replying response frame immediately sends response request frame, comprising: to not requiring that whole receiving terminals of replying immediately in the receiving terminal of response frame send response request frame, described method also comprises:
No longer identical data are sent to the receiving terminal with secondary AC being successfully detected response frame after next time competes channel.
8. the method according to any one of claim 1-7, it is characterized in that, the mark being used to indicate and whether requiring to reply response frame is immediately carried in described Frame, so that after described receiving terminal receives described Frame, according to described be identified at do not need or need to receive response request frame time reply response frame.
9. treatment facility during initialization multi-user transmission chance MU TXOP, is characterized in that, comprising:
Dataframe device, the Frame being used for initialization MU TXOP is sent for the receiving terminal at least two, make described receiving terminal reply corresponding response frame to described Frame, in the receiving terminal of described at least two, at least comprise the receiving terminal with main access category AC;
Control frame transmitter, for not requiring that the receiving terminal of replying response frame immediately sends response request frame, does not require described in making that the receiving terminal of replying response frame immediately replys corresponding response frame to described Frame after receiving described response request frame;
Processor, if for successfully detecting the response frame that arbitrary receiving terminal with described main AC sends, then determine MU TXOP initialization success.
10. equipment according to claim 9, is characterized in that, described control frame transmitter specifically for: do not require to reply immediately the receiving terminal in the receiving terminal of response frame with main AC send response request frame to described.
11. equipment according to claim 9, is characterized in that, described processor also for: if described in there is the receiving terminal of main AC response frame be not all successfully detected, then rollback is carried out to main AC.
12. equipment according to claim 11, is characterized in that, described processor specifically for:
If described Frame is short frame, then often sending once described Frame then increases by 1 to service quality short retry counter QSRC [AC]; If described QSRC [AC] reaches short frame retry threshold, be then set to window minimum by the competition window of main AC; If described QSRC [AC] does not reach short frame retry threshold, if then the current competitive window of described main AC is less than window maximum, following value is updated to: (CW [AC]+1) * 2-1 by the competition window of main AC, wherein, CW [AC] is the current competitive window of main AC; If CW [AC] equals window maximum, remain unchanged to the competition window of main AC; Backoff timer is set to an integer of a Stochastic choice in a uniformly distributed manner within the scope of [0, CW [AC]] closed interval.
13. equipment according to claim 11, is characterized in that, described processor specifically for:
If described Frame is long frame, then often sending once described Frame then increases by 1 to the long retryCounter QLRC [AC] of service quality; If described QLRC [AC] reaches long frame retry threshold, be then set to window minimum by the competition window of main AC; If described QLRC [AC] does not reach long frame retry threshold, if then the current competitive window of described main AC is less than window maximum, following value is updated to: (CW [AC]+1) * 2-1 by the competition window of main AC, wherein, CW [AC] is the current competitive window of main AC; If CW [AC] equals window maximum, remain unchanged to the competition window of main AC; Backoff timer is set to an integer of a Stochastic choice in a uniformly distributed manner within the scope of [0, CW [AC]] closed interval.
14. equipment according to any one of claim 9-13, is characterized in that,
Described control frame transmitter is specifically for sending response request frames to the whole receiving terminals not requiring to reply immediately in the receiving terminal of response frame;
Described processor also no longer sends identical data to the receiving terminal with secondary AC being successfully detected response frame after competing channel in next time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110174202.4A CN102843221B (en) | 2011-06-24 | 2011-06-24 | Method and device for processing in initialization of MU TXOP (memory unit-symmetric transmission opportunity) |
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| CN201110174202.4A CN102843221B (en) | 2011-06-24 | 2011-06-24 | Method and device for processing in initialization of MU TXOP (memory unit-symmetric transmission opportunity) |
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| WO2015013985A1 (en) | 2013-08-02 | 2015-02-05 | 华为技术有限公司 | Communication method, device and system for multiple access points |
| AU2015244516B2 (en) * | 2014-04-10 | 2017-09-28 | Lg Electronics Inc. | Retransmission method at time of sharing transmission opportunity in wireless lan system, and device therefor |
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| CN101159644A (en) * | 2001-11-13 | 2008-04-09 | 皇家飞利浦电子股份有限公司 | Apparatus and method for providing ieee 802.11e hybrid coordinator recovery and backoff rules |
| CN101548573A (en) * | 2006-11-15 | 2009-09-30 | 高通股份有限公司 | Transmissions to multiple stations in wireless communication systems |
| WO2010093919A2 (en) * | 2009-02-13 | 2010-08-19 | Qualcomm Incorporated | Distributed mimo |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101159644A (en) * | 2001-11-13 | 2008-04-09 | 皇家飞利浦电子股份有限公司 | Apparatus and method for providing ieee 802.11e hybrid coordinator recovery and backoff rules |
| CN101548573A (en) * | 2006-11-15 | 2009-09-30 | 高通股份有限公司 | Transmissions to multiple stations in wireless communication systems |
| WO2010093919A2 (en) * | 2009-02-13 | 2010-08-19 | Qualcomm Incorporated | Distributed mimo |
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