CN102769925A - Sending method and device of control frame - Google Patents
Sending method and device of control frame Download PDFInfo
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Abstract
The invention discloses a sending method of a control frame, which comprises the following steps: using a specific queue category and/or competition to a queue category of a channel to send the control frame when the measurement of the channel information is conducted. The invention further provides a sending device of the control device. According to the technical solution disclosed by the invention, the control frame can be sent when the measurement of the channel information is conducted.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of sending method and device of control frame.
Background technology
At present, WLAN in field of wireless (WLAN, Wireless Local Area Networks) fast development, also growing to the demand that WLAN covers, also increasingly high to the requirement of throughput.In the IEEE802.11 group of IEEE-USA's industrial specification, successively defined the initial WLAN technology of series of standards such as 802.11a, 802.11b and 802.11g; Other task groups have appearred again subsequently successively; Be devoted to develop the standard that relates to existing 802.11 technological improvements, for example the 802.11n task groups proposes the requirement of high-throughput (HT, High Throughput); Can support data rate up to 600Mbps; 802.11ac task groups further proposes the notion of gigabit throughput (VHT, Very High Throughput), through introducing bigger channel width data rate is risen to 1Gbps.
802.11 in the task groups, (STA Station) has formed a Basic Service Set (BSS, Basic Service Set) for an access point (AP, Access Point) and a plurality of websites of being associated with AP.802.11 task groups has defined two kinds of operator schemes: distributed coordination function (DCF; Distributed Coordination Function) and point coordination function (PCF; Point Coordination Function); And the improvement that is directed against these two kinds of operator schemes; Be enhancement mode distributed coordination access function (EDCA, Enhanced Distributed Channel Access) and Hybrid Coordination Function control channel access function (HCCA, Hybrid Coor Dination Function Controlled Channel Access).Wherein, DCF is the most basic operator scheme, utilizes to have Carrier Sense Multiple Access (CSMA/CA, the CSMA with Collision Avoidance) mechanism that conflict is avoided, and makes a plurality of website sharing wireless channel; EDCA is the operator scheme of enhancement mode, upper layer data is mapped to four different formation classifications (AC, Access Categories): AC_VO (AC_Voice), AC_VI (AC_Video), AC_BE (AC_BestEffort), AC_BK (AC_Background); Each formation classification uses the parameter of different competitive channels to distinguish priority.EDCA utilizes CSMA/CA mechanism, makes a plurality of different priorities queue sharing wireless channels, and preengages a transmission opportunity (TXOP, Transmission Opportunity).The basic process that the different priorities formation obtains transmission opportunity is: each formation uses different backoff interval to add that competing backoff window arbitrarily comes access channel when channel idle, to reduce collision.
In the prior art, introduce Multiple Input Multiple Output (MIMO, Multiple Input Multiple Output) and improve systematic function.In order to guarantee that data can reliable and effectively send, the initiator need measure one or more recipients' channel situation, and according to the channel information configuration transmission parameter that measures.
Fig. 1 is the schematic flow sheet of feedback of channel information in the prior art, and is as shown in Figure 1, in order to carry out the measurement of channel information; Defined new frame turnaround sequence, be specially, the measurement side of channel information sends the empty data announcement frame (NDPA that is used to notify the website that need carry out feedback of channel information; Null Data Packet Announcement) frame; And send short interFrameGap (SIFS, the Short Interframe Space) back of finishing at NDPA and send null packet (NDP, Null Data Packet); Channel feedback information (Sounding Feedback) is replied by first the feedback of channel information side that indicates in the acquiescence NDPA behind the SIFS that harvests NDPA and NDP.If a plurality of channel feedback sides are arranged, except that first feedback side acquiescence feedback, other feedback of channel information sides need come feedback channel information according to the poll (Sounding Poll) of the measurement side of channel information.
In the prior art; The regulation management frames uses AC_VO formation classification to send; Send (RTS when using request; Request To Send) or clear to send (CTS, Clear To Send) during, RTS or CTS should inherit the employed formation of follow-up data in the same frame turnaround sequence as first frame of frame turnaround sequence.But, after introducing channel information measurement, be not given for the employed formation of notification frame (for example being NDPA) of channel information measurement in the prior art.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of sending method and device of control frame, can transmission control frame when carrying out channel information measurement.
For achieving the above object, technical scheme of the present invention is achieved in that
The present invention provides a kind of sending method of control frame, comprising:
When carrying out channel information measurement, use the particular queue classification and/or compete the formation classification transmission control frame of channel.
In the said method, said control frame is the first frame that is used for carrying out the multiframe turnaround sequence of channel information measurement and channel information reporting, as the notification frame of notification channel feedback information side.
In the said method,
Said particular queue classification is: predefined formation classification, or the identical formation classification of radio frames of use and follow-up channel information measurement to be received report;
Said use particular queue classification transmission control frame is: the independent particular queue classification of using is carried out channel competition, transmission control frame on the channel of competing, or use the particular queue classification transmission control frame of having competed channel.
In the said method,
The formation classification transmission control frame that channel is competed in said use is: the follow-up data to be sent or the formation classification competitive channel at management frames place; Transmission control frame on the channel of competing; Or the formation classification competitive channel at irrelevant data or management frames place, transmission control frame on the channel of competing.
In the said method,
Said when carrying out channel information measurement and channel information reporting, belong to other radio frames of same transmit leg with said control frame, use the formation classification identical with said control frame;
Said carry out channel information measurement and channel information reporting before, when carrying out the exchange of other frame, use the formation classification identical with said control frame.
In the said method, said use particular queue classification transmission control frame is:
Define the formation classification of AC_VO in advance for the empty data announcement frames of transmission (NDPA);
When the channel information of the channel information of certain site or the website that measures had lost efficacy in access point (AP) does not have Basic Service Set (BSS), formation classification AC_VO competitive channel;
AP sends NDPA on the channel that uses formation classification AC_VO to compete, carry out the channel information measurement of said website.
In the said method, said use particular queue classification transmission control frame is:
Define the formation classification of AC_VI in advance for transmission NDPA;
When among the formation classification AC_VI of AP the data of targeted sites STA1 being arranged, formation classification AC_VI competitive channel;
After formation classification AC_VI competes channel, when AP does not have the channel information of targeted sites STA1, on the channel that uses formation classification AC_VI to compete, send NDPA, carry out the channel information measurement of targeted sites STA1.
In the said method,
This method also comprises: the data of on the channel that uses formation classification AC_VI to compete, sending targeted sites STA1;
Said on the channel that uses formation classification AC_VI to compete, send the data of targeted sites STA1 after, this method also comprises: AP uses formation classification AC_VI to send NDPA, carries out the channel information measurement of other websites.
In the said method, said use particular queue classification transmission control frame is:
Defining AC_VO in advance is the formation classification of feedback of channel information frame, and the formation classification of predefine NDPA not;
When among the formation classification AC_VO of AP the data of targeted sites STA1 being arranged, formation classification AC_VO competitive channel;
After formation classification AC_VO competes channel, when AP does not have the channel information of targeted sites STA1, on the channel that uses formation classification AC_VO to compete, send NDPA, carry out the channel information measurement of targeted sites STA1.
In the said method,
This method also comprises: the data of on the channel that uses formation classification AC_VO to compete, sending targeted sites STA1;
In the said method, the formation classification transmission control frame that channel is competed in said use is:
The formation classification AC_BE of AP competes channel; And when AP does not have the channel information of targeted sites STA1 or the channel information of the targeted sites STA1 that measures had lost efficacy; AP uses the formation classification AC_BE that competes channel to send NDPA, carries out the channel information measurement of targeted sites STA1.
In the said method,
This method also comprises: the data of using the formation classification AC_VI transmission targeted sites STA1 that competes channel;
The formation classification AC_VI that channel is competed in said use sends after the data of targeted sites STA1, and this method also comprises: AP uses the formation classification AC_VI that competes channel to send NDPA, carries out the channel information measurement of other websites.
In the said method, the formation classification transmission control frame that channel is competed in said use is:
The management frames that targeted sites STA1 is arranged in the formation classification AC_VO of AP; The formation classification AC_VO of AP competes channel; When AP does not have the channel information STA1 of targeted sites or the channel information of the targeted sites STA1 that measures when having lost efficacy; AP used the formation classification AC_VO that competes channel to send NDPA before management frame transmission, carried out the channel information measurement of targeted sites STA1.
In the said method, the formation classification transmission control frame that channel is competed in said use is:
The data that targeted sites STA1 is arranged in the formation classification AC_VI of AP; And the data that targeted sites STA2 is arranged among the formation classification AC_VO; And the data that targeted sites STA3 is arranged among the formation classification AC_BK; Need be with the packing data of STA1, STA2 and STA3, but when not having the channel information of channel information or STA1 and the STA2 of STA1 and STA2 to lose efficacy, after said formation classification AC_VI competes channel; AP uses the formation classification AC_VI that competes channel to send NDPA, carries out the channel information measurement of STA1 and STA2.
In the said method, the formation classification transmission control frame that channel is competed in said use is:
When among the formation classification AC_VO of STA1 the data of targeted sites AP being arranged, after the formation classification AC_VO of STA1 competed channel, STA1 used the formation classification AC_VO that competes channel to send NDPA before transfer of data, carried out the channel information measurement of AP.
In the said method, the formation classification transmission control frame that channel is competed in said use is:
In BSS (IBSS) independently; When having targeted sites to be the data of STA2 among the formation classification AC_VO of STA1; After the formation classification AC_VO of STA1 competed channel, STA1 used the formation classification AC_VO that competes channel to send NDPA before transfer of data, carried out the channel information measurement of STA2.
In the said method, said use particular queue classification with the formation classification transmission control frame of competing channel is:
Define the formation classification of AC_VO for transmission NDPA in advance, AP uses the channel information of AC_VO formation categorical measure STAs;
It is the data of STA1 that targeted sites is arranged in formation classification AC_VI; And when formation classification AC_VI competes channel; If AP does not have the channel information of STA1 or the channel information of the STA1 that measures lost efficacy; AP used the formation classification AC_VI that competes channel to send NDPA before transfer of data, carried out the channel information measurement of STA1.
The present invention also provides a kind of dispensing device of control frame, and the dispensing device of this control frame is used for, and when carrying out channel information measurement, uses the particular queue classification and/or competes the formation classification transmission control frame of channel.
In the dispensing device of above-mentioned control frame, said control frame is the first frame that is used for carrying out the multiframe turnaround sequence of channel information measurement and channel information reporting, as the notification frame of notification channel feedback information side.
In the dispensing device of above-mentioned control frame,
Said particular queue classification is predefined formation classification, or the identical formation classification of radio frames of use and follow-up channel information measurement to be received report;
Said use particular queue classification transmission control frame is: the independent particular queue classification of using is carried out channel competition, transmission control frame on the channel of competing, or use the particular queue classification transmission control frame of having competed channel.
In the dispensing device of above-mentioned control frame,
The formation classification transmission control frame that channel is competed in said use is: the follow-up data to be sent or the formation classification competitive channel at management frames place; Transmission control frame on the channel of competing; Or the formation classification competitive channel at irrelevant data or management frames place, transmission control frame on the channel of competing.
The sending method of control frame provided by the invention and device; When carrying out channel information measurement; Use the particular queue classification and/or compete the formation classification transmission control frame of channel; Can in carrying out the channel information measurement process, realize transmission, remedy the blank of the employed formation of notification frame that is not given for channel information measurement in the prior art as the control frame of notification frame.
Description of drawings
Fig. 1 is the schematic flow sheet of feedback of channel information in the prior art;
Fig. 2 is the schematic flow sheet of the embodiment one of the present invention's sending method of realizing control frame;
Fig. 3 is the schematic flow sheet of the embodiment two of the present invention's sending method of realizing control frame;
Fig. 4 is the schematic flow sheet of the embodiment three of the present invention's sending method of realizing control frame;
Fig. 5 is the schematic flow sheet of the embodiment four of the present invention's sending method of realizing control frame.
Embodiment
Basic thought of the present invention is: when carrying out channel information measurement, use the particular queue classification and/or compete the formation classification transmission control frame of channel.
Through accompanying drawing and specific embodiment the present invention is done further detailed description more below.
The present invention provides a kind of sending method of control frame, and this method comprises: when carrying out channel information measurement, use the particular queue classification and/or compete the formation classification transmission control frame of channel.
Wherein, use particular queue classification transmission control frame to be meant and to use predefined formation classification transmission control frame, promptly use fixing formation classification transmission control frame; And use the formation classification transmission control frame of competing channel to refer in channel competition, utilize the formation classification transmission control frame of competing channel, so the formation classification of transmission control frame is unfixing.
Wherein, control frame is meant the first frame of the multiframe turnaround sequence that is used for carrying out channel information measurement and channel information reporting, and control frame is the notification frame that is used for notification channel feedback information side; When carrying out channel information measurement and channel information reporting, belong to other radio frames of same transmit leg with said control frame, use the formation classification identical with said control frame, other radio frames can be Sounding Poll frame here.
Wherein, said particular queue classification is the predefined formation classification of wireless local area network (WLAN) system, or the particular queue classification is used the identical formation classification of reporting with follow-up channel information measurement to be received of radio frames;
Use particular queue classification transmission control frame to be: the independent particular queue classification of using is carried out channel competition, transmission control frame on the channel of competing, or use the particular queue classification transmission control frame of having competed channel; Here, when not having other data etc. to be transmitted in the formation classification, can independently use said particular queue classification to carry out channel competition, transmission control frame on the channel of competing; When other transfer of data was arranged in the channel, said use particular queue classification was carried out channel competition, transmission control frame on the channel of competing.
The formation classification transmission control frame that channel is competed in said use is: the follow-up data to be sent or the formation classification competitive channel at management frames place; Transmission control frame on the channel of competing; Or the formation classification competitive channel at irrelevant data or management frames place, transmission control frame on the channel of competing; Wherein, follow-up data to be sent or management frames are meant that the targeted sites of data that these are to be sent or management frames is identical with the targeted sites of channel information measurement; Irrelevant data or management frames are meant that the targeted sites of these data or management frames is different with the targeted sites of channel information measurement.For example, after the data of having sent the A website, still carry out the channel information measurement of B website if having time, can carry out the channel information measurement of B website this moment.
Here, before carrying out channel information measurement and channel information reporting, when carrying out other frame exchange, use the formation classification identical with said control frame, wherein other frames can be RTS, CTS etc.
Embodiment one
Fig. 2 is the schematic flow sheet of the embodiment one of the present invention's sending method of realizing control frame, in the present embodiment, in a BSS, three website: AP, STA1 and STA2 is arranged, and this method may further comprise the steps:
Step 201, AP defines the formation classification of formation classification AC_VO for transmission NDPA in advance.
Step 202, when between three websites when a certain period does not have business, AP does not have the channel information of the channel information of STA1 and STA2 or STA1 that measures and STA2 to lose efficacy, then formation classification AC_VO competitive channel.
Step 203, AP sends NDPA on the channel that uses formation classification AC_VO to compete, carry out the channel information measurement of STA1 and STA2;
Concrete, behind the competitive channel, on the channel that uses formation classification AC_VO to compete, send NDPA, be used to carry out the channel information measurement of STA1 and STA2; Here, follow-up Sounding Poll frame uses the formation classification identical with said NDPA; In order to make in the TXOP transfer of data more reliable, can before channel information measurement, send RTS or CTS, this RTS or CTS use the formation classification AC_VO identical with NDPA.
Embodiment two
Fig. 3 is the schematic flow sheet of the embodiment two of the present invention's sending method of realizing control frame, in the present embodiment, in a BSS, six website: AP and five STAs is arranged, and this method may further comprise the steps:
Step 301, AP defines the formation classification of formation classification AC_VI for transmission NDPA in advance.
Step 302, when a certain period did not have business, AP did not have the channel information of each STAs or channel information to lose efficacy between AP and each website, then formation classification AC_VI competitive channel.
Step 303, AP sends NDPA on the channel that uses formation classification AC_VI to compete, carry out the channel information measurement of five websites;
Concrete, behind the competitive channel, on the channel that uses formation classification AC_VI to compete, send NDPA, be used to carry out the channel information measurement of five websites; Here; Follow-up Sounding Poll frame uses the formation classification identical with said NDPA; But in a TXOP, can only carry out the measurement of three channel informations; In next TXOP, begin to carry out the measurement of subsequent communication channel information from Sounding Poll, the Sounding Poll in two TXOP use identical formation classification with the interior NDPA of first TXOP; In order to make in the TXOP transfer of data more reliable, can before channel information measurement, send RTS or CTS, this RTS or CTS use the formation classification AC_VI identical with NDPA.
Embodiment three
Fig. 4 is the schematic flow sheet of the embodiment three of the present invention's sending method of realizing control frame, in the present embodiment, in a BSS, three website: AP, STA1 and STA2 is arranged, and this method may further comprise the steps:
Step 401, AP defines the formation classification of formation classification AC_VI for transmission NDPA in advance.
Step 402; The data that targeted sites STA1 is arranged among the formation classification AC_VI of AP, formation classification AC_VI competitive channel is not when AP has the channel information of targeted sites STA1; On the channel that uses formation classification AC_VI to compete, send NDPA, carry out the channel information measurement of targeted sites STA1;
Concrete, the data of targeted sites STA1, formation this moment classification AC_VI competitive channel are arranged among the formation classification AC_VI of AP; After formation classification AC_VI competes channel, if AP has the channel information of targeted sites STA1, the data that just can directly on the channel that uses formation classification AC_VI to compete, send targeted sites STA1;
If AP does not have the channel information of targeted sites STA1; Can on the channel that uses formation classification AC_VI to compete, send NDPA earlier; Carry out the channel information measurement of targeted sites STA1, the data of on the channel that uses formation classification AC_VI to compete, sending targeted sites STA1 again.
Step 403 uses formation classification AC_VI to send NDPA, carries out the channel information measurement of STA2;
Concrete, after the transfer of data of STA1 finished, if also have time enough to carry out the channel information measurement of STA2, then AP can use formation classification AC_VI to send NDPA, is used to carry out the channel information measurement of STA2.
Embodiment four
Fig. 5 is the schematic flow sheet of the embodiment four of the present invention's sending method of realizing control frame, in the present embodiment, in a BSS, three website: AP, STA1 and STA2 is arranged, and this method may further comprise the steps:
Step 501, AP defines the formation classification that formation classification AC_VO is the feedback of channel information frame in advance, and the formation classification of predefine NDPA not.
Step 502, formation classification AC_VO competitive channel when AP does not have the channel information of targeted sites STA1, sends NDPA on the channel that uses formation classification AC_VI to compete, carry out the channel information measurement of targeted sites STA1;
Concrete, the data of targeted sites STA1, formation this moment classification AC_VO competitive channel are arranged among the formation classification AC_VO of AP; After using formation classification AC_VO to compete channel, if AP has the channel information of targeted sites STA1, the data that just can directly on the channel that uses formation classification AC_VO to compete, send targeted sites STA1;
If AP does not have the channel information of targeted sites STA1; Can on the channel that uses formation classification AC_VO to compete, send NDPA earlier; Carry out the channel information measurement of targeted sites STA1, and then the data of on the channel that uses formation classification AC_VO to compete, sending targeted sites STA1.
Step 503 uses the formation classification AC_VO identical with the feedback of channel information frame to send NDPA, carries out the channel information measurement of STA2;
Concrete; After the transfer of data of STA1 finished; If also have time enough to carry out the channel information measurement of STA2; Because the formation classification of NDPA is not transmitted in definition in advance, then AP can use the formation classification AC_VO identical with the feedback of channel information frame to send NDPA, is used to carry out the channel information measurement of STA2.
The above embodiments one to embodiment four are to the situation of using particular queue classification transmission control frame.
Embodiment five
For example, in a BSS, any a plurality of site STA s is arranged, the data of targeted sites STA1 are arranged in the formation classification AC_BE of AP;
The formation classification AC_BE of AP competes channel; But AP does not have the channel information of STA1 or the channel information of the STA1 that measures lost efficacy; Therefore AP optionally can be before transfer of data in order to make data with a suitable modulating and encoding scheme (MCS, Modulation and Coding Scheme) transmission; AP uses the formation classification AC_BE that competes channel to send NDPA, is used to carry out the channel information measurement of STA1;
According to the channel information of the STA1 that measures, select suitable MCS transmission data again; In order to make that transfer of data is more reliable in the TXOP, can before channel information measurement, send RTS or CTS, when sending this RTS or CTS, use the formation classification AC_BE identical with NDPA.
Embodiment six
For example, in a BSS, three website: AP, STA1 and STA2 are arranged, the data of targeted sites STA1 are arranged in the formation classification AC_VI of AP, AP does not have the data of STA2;
When formation classification AC_VI competes channel,, just can use the data of the formation classification AC_VI transmission STA1 that competes channel if AP has the channel information of STA1; If AP does not have the channel information of STA1, AP can use the formation classification AC_VI that competes channel to send NDPA earlier, is used to carry out the channel information measurement of STA1, transmits the data of STA1 again;
After the transfer of data of STA1 finished, if also have time enough to carry out the channel information measurement of STA2, AP can use the formation classification AC_VI that competes channel to send NDPA, is used to carry out the channel information measurement of STA2.
Embodiment seven
For example, in a BSS, any a plurality of site STA s is arranged; The management frames that targeted sites STA1 is arranged in the formation classification AC_VO of AP; The formation classification AC_VO of AP competes channel, but AP does not have the channel information of STA1 or the channel information of the STA1 that measures lost efficacy, so AP is in order to make data with a suitable MCS transmission; Optionally can before management frame transmission, use the formation classification AC_VO that competes channel to send NDPA, be used to carry out the channel information measurement of STA1; According to the channel information of the STA1 that measures, select suitable MCS transfer management frame again; In order to make that management frame transmission is more reliable in the TXOP, can before channel information measurement, send RTS or CTS, when sending this RTS or CTS, use the formation classification AC_VO identical with NDPA.
Embodiment eight
For example, in a BSS, any a plurality of site STA s is arranged, the data of targeted sites STA1 are arranged among the formation classification AC_VI of AP, and the data of targeted sites STA2 are arranged among the formation classification AC_VO, and the data of targeted sites STA3 are arranged among the formation classification AC_BK;
When the formation classification AC_VI of AP competes channel; Need be with the packing data of STA1, STA2 and STA3; And use multi-user's multiple-input and multiple-output (MU-MIMO, Multi-user Multiple Input, Multiple Output) to send; But there are not the channel information of STA1 and STA2 or the channel information of STA1 and STA2 to lose efficacy; There are the channel information of STA3 or the channel information of STA3 not to lose efficacy, therefore, can before transfer of data, only carry out the channel information measurement of STA1 and STA2 in order to guarantee reliable data transmission;
AP uses the NDPA of the formation classification AC_VI transmission of competing channel, is used to carry out the channel information measurement of STA1 and STA2; Follow-up Sounding Poll frame also is to use the formation classification AC_VI that competes channel; In order to make that transfer of data is more reliable in the TXOP, can before channel information measurement, send RTS or CTS, when sending this RTS or CTS, use the formation classification AC_VI identical with NDPA.
Embodiment nine
For example; In BSS, it is the data of AP that targeted sites is arranged among the formation classification AC_VO of STA1, and the formation classification AC_VO of STA1 competes channel; But STA1 does not have the channel information of AP or the channel information of the AP that measures lost efficacy; Therefore STA1 can use the formation classification AC_VO that competes channel to send NDPA before transfer of data in order to make data with a suitable MCS transmission, was used to carry out the channel information measurement of AP;
According to the channel information of the AP that measures, select suitable MCS transmission data again; In order to make that transfer of data is more reliable in the TXOP, can before channel information measurement, send RTS or CTS, when sending this RTS or CTS, use the formation classification AC_VO identical with NDPA.
Embodiment ten
For example; At BSS (IBSS independently; Independent BSS) in, it is the data of STA2 that targeted sites is arranged among the formation classification AC_VO of STA1, and the formation classification AC_VO of STA1 competes channel; But STA1 does not have the channel information of STA2 or the channel information of the STA2 that measures lost efficacy; Therefore STA1 can use the formation classification AC_VO that competes channel to send NDPA before transfer of data in order to make data with a suitable MCS transmission, was used to carry out the channel information measurement of STA2;
According to the channel information of the STA2 that measures, select suitable MCS transmission data again; In order to make that transfer of data is more reliable in the TXOP, can before channel information measurement, send RTS or CTS, when sending this RTS or CTS, use the formation classification AC_VO identical with NDPA.
The above embodiments five to embodiment ten are to the situation of using the formation classification transmission control frame of competing.
Embodiment 11
For example, in a BSS, there are an AP and 20 STAs, and define the formation classification of AC_VO in advance for transmission NDPA; The channel information of the use AC_VO formation categorical measure STAs in AP cycle, at a time, it is the data of STA1 that targeted sites is arranged among the formation classification AC_VI, formation classification AC_VI competes channel; AP does not have the channel information of STA1 or the channel information of the STA1 that measures lost efficacy; AP is in order to make data with a suitable MCS transmission; Optionally can before transfer of data, use the formation classification AC_VI that competes channel to send NDPA, be used to carry out the channel information measurement of STA1;
According to the channel information of the STA1 that measures, select suitable MCS transmission data again; In order to make that transfer of data is more reliable in the TXOP, can before channel information measurement, send RTS or CTS, when sending this RTS or CTS, use the formation classification AC_VI identical with NDPA.
Embodiment 11 is to the situation of using the particular queue classification with the formation classification transmission control frame of competing simultaneously.
Be to realize said method, the present invention also provides a kind of dispensing device of control frame, and the dispensing device of this control frame is used for, and when carrying out channel information measurement, uses the particular queue classification and/or competes the formation classification transmission control frame of channel.
Said control frame is the first frame that is used for carrying out the multiframe turnaround sequence of channel information measurement and channel information reporting, as the notification frame of notification channel feedback information side.
Said particular queue classification is predefined formation classification, or said particular queue classification is used the identical formation classification of reporting with follow-up channel information measurement to be received of radio frames;
Said use particular queue classification transmission control frame is: the independent particular queue classification of using is carried out channel competition, transmission control frame on the channel of competing, or use the particular queue classification transmission control frame of having competed channel.
The formation classification transmission control frame that channel is competed in said use is: the follow-up data to be sent or the formation classification competitive channel at management frames place; Transmission control frame on the channel of competing; Or the formation classification competitive channel at irrelevant data or management frames place, transmission control frame on the channel of competing.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (21)
1. the sending method of a control frame is characterized in that, this method comprises:
When carrying out channel information measurement, use the particular queue classification and/or compete the formation classification transmission control frame of channel.
2. method according to claim 1 is characterized in that, said control frame is the first frame that is used for carrying out the multiframe turnaround sequence of channel information measurement and channel information reporting, as the notification frame of notification channel feedback information side.
3. method according to claim 1 is characterized in that,
Said particular queue classification is: predefined formation classification, or the identical formation classification of radio frames of use and follow-up channel information measurement to be received report;
Said use particular queue classification transmission control frame is: the independent particular queue classification of using is carried out channel competition, transmission control frame on the channel of competing, or use the particular queue classification transmission control frame of having competed channel.
4. method according to claim 1 is characterized in that,
The formation classification transmission control frame that channel is competed in said use is: the follow-up data to be sent or the formation classification competitive channel at management frames place; Transmission control frame on the channel of competing; Or the formation classification competitive channel at irrelevant data or management frames place, transmission control frame on the channel of competing.
5. method according to claim 2 is characterized in that,
Said when carrying out channel information measurement and channel information reporting, belong to other radio frames of same transmit leg with said control frame, use the formation classification identical with said control frame;
Said carry out channel information measurement and channel information reporting before, when carrying out the exchange of other frame, use the formation classification identical with said control frame.
6. according to arbitrary described method in the claim 1 to 3, it is characterized in that said use particular queue classification transmission control frame is:
Define the formation classification of AC_VO in advance for the empty data announcement frames of transmission (NDPA);
When the channel information of the channel information of certain site or the website that measures had lost efficacy in access point (AP) does not have Basic Service Set (BSS), formation classification AC_VO competitive channel;
AP sends NDPA on the channel that uses formation classification AC_VO to compete, carry out the channel information measurement of said website.
7. according to arbitrary described method in the claim 1 to 3, it is characterized in that said use particular queue classification transmission control frame is:
Define the formation classification of AC_VI in advance for transmission NDPA;
When among the formation classification AC_VI of AP the data of targeted sites STA1 being arranged, formation classification AC_VI competitive channel;
After formation classification AC_VI competes channel, when AP does not have the channel information of targeted sites STA1, on the channel that uses formation classification AC_VI to compete, send NDPA, carry out the channel information measurement of targeted sites STA1.
8. method according to claim 7 is characterized in that,
This method also comprises: the data of on the channel that uses formation classification AC_VI to compete, sending targeted sites STA1;
Said on the channel that uses formation classification AC_VI to compete, send the data of targeted sites STA1 after, this method also comprises: AP uses formation classification AC_VI to send NDPA, carries out the channel information measurement of other websites.
9. according to arbitrary described method in the claim 1 to 3, it is characterized in that said use particular queue classification transmission control frame is:
Defining AC_VO in advance is the formation classification of feedback of channel information frame, and the formation classification of predefine NDPA not;
When among the formation classification AC_VO of AP the data of targeted sites STA1 being arranged, formation classification AC_VO competitive channel;
After formation classification AC_VO competes channel, when AP does not have the channel information of targeted sites STA1, on the channel that uses formation classification AC_VO to compete, send NDPA, carry out the channel information measurement of targeted sites STA1.
10. method according to claim 9 is characterized in that,
This method also comprises: the data of on the channel that uses formation classification AC_VO to compete, sending targeted sites STA1;
11., it is characterized in that the formation classification transmission control frame that channel is competed in said use is according to arbitrary described method in claim 1 or 2 or 4:
The formation classification AC_BE of AP competes channel; And when AP does not have the channel information of targeted sites STA1 or the channel information of the targeted sites STA1 that measures had lost efficacy; AP uses the formation classification AC_BE that competes channel to send NDPA, carries out the channel information measurement of targeted sites STA1.
12. method according to claim 11 is characterized in that,
This method also comprises: the data of using the formation classification AC_VI transmission targeted sites STA1 that competes channel;
The formation classification AC_VI that channel is competed in said use sends after the data of targeted sites STA1, and this method also comprises: AP uses the formation classification AC_VI that competes channel to send NDPA, carries out the channel information measurement of other websites.
13., it is characterized in that the formation classification transmission control frame that channel is competed in said use is according to arbitrary described method in claim 1 or 2 or 4:
The management frames that targeted sites STA1 is arranged in the formation classification AC_VO of AP; The formation classification AC_VO of AP competes channel; When AP does not have the channel information STA1 of targeted sites or the channel information of the targeted sites STA1 that measures when having lost efficacy; AP used the formation classification AC_VO that competes channel to send NDPA before management frame transmission, carried out the channel information measurement of targeted sites STA1.
14., it is characterized in that the formation classification transmission control frame that channel is competed in said use is according to arbitrary described method in claim 1 or 2 or 4:
The data that targeted sites STA1 is arranged in the formation classification AC_VI of AP; And the data that targeted sites STA2 is arranged among the formation classification AC_VO; And the data that targeted sites STA3 is arranged among the formation classification AC_BK; Need be with the packing data of STA1, STA2 and STA3, but when not having the channel information of channel information or STA1 and the STA2 of STA1 and STA2 to lose efficacy, after said formation classification AC_VI competes channel; AP uses the formation classification AC_VI that competes channel to send NDPA, carries out the channel information measurement of STA1 and STA2.
15., it is characterized in that the formation classification transmission control frame that channel is competed in said use is according to arbitrary described method in claim 1 or 2 or 4:
When among the formation classification AC_VO of STA1 the data of targeted sites AP being arranged, after the formation classification AC_VO of STA1 competed channel, STA1 used the formation classification AC_VO that competes channel to send NDPA before transfer of data, carried out the channel information measurement of AP.
16., it is characterized in that the formation classification transmission control frame that channel is competed in said use is according to arbitrary described method in claim 1 or 2 or 4:
In BSS (IBSS) independently; When having targeted sites to be the data of STA2 among the formation classification AC_VO of STA1; After the formation classification AC_VO of STA1 competed channel, STA1 used the formation classification AC_VO that competes channel to send NDPA before transfer of data, carried out the channel information measurement of STA2.
17., it is characterized in that said use particular queue classification with the formation classification transmission control frame of competing channel is according to arbitrary described method in the claim 1 to 4:
Define the formation classification of AC_VO for transmission NDPA in advance, AP uses the channel information of AC_VO formation categorical measure STAs;
It is the data of STA1 that targeted sites is arranged in formation classification AC_VI; And when formation classification AC_VI competes channel; If AP does not have the channel information of STA1 or the channel information of the STA1 that measures lost efficacy; AP used the formation classification AC_VI that competes channel to send NDPA before transfer of data, carried out the channel information measurement of STA1.
18. the dispensing device of a control frame is characterized in that, the dispensing device of this control frame is used for, and when carrying out channel information measurement, uses the particular queue classification and/or competes the formation classification transmission control frame of channel.
19. dispensing device according to claim 18 is characterized in that, said control frame is the first frame that is used for carrying out the multiframe turnaround sequence of channel information measurement and channel information reporting, as the notification frame of notification channel feedback information side.
20. dispensing device according to claim 18 is characterized in that,
Said particular queue classification is predefined formation classification, or the identical formation classification of radio frames of use and follow-up channel information measurement to be received report;
Said use particular queue classification transmission control frame is: the independent particular queue classification of using is carried out channel competition, transmission control frame on the channel of competing, or use the particular queue classification transmission control frame of having competed channel.
21. dispensing device according to claim 18 is characterized in that,
The formation classification transmission control frame that channel is competed in said use is: the follow-up data to be sent or the formation classification competitive channel at management frames place; Transmission control frame on the channel of competing; Or the formation classification competitive channel at irrelevant data or management frames place, transmission control frame on the channel of competing.
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| CN201110114169.6A CN102769925B (en) | 2011-05-04 | 2011-05-04 | The sending method and device of a kind of control frame |
| PCT/CN2012/074560 WO2012149874A1 (en) | 2011-05-04 | 2012-04-23 | Method and device for sending control frame |
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| CN201110114169.6A CN102769925B (en) | 2011-05-04 | 2011-05-04 | The sending method and device of a kind of control frame |
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| CN102769925B (en) | 2017-09-01 |
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