CN102468946A - Multi-user transmission method and access point - Google Patents
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Abstract
The invention provides a multi-user transmission method, which comprises the following steps: an Access Point (AP) reserves a channel occupation time in a coverage area of the AP, and/or the AP reserves a channel with a Station (STA) which is to perform multi-user transmission; and after the channel reservation is finished, the AP sends multi-user data. The invention also provides an access point. The invention realizes multi-user transmission.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of multiuser transmission method and access point among the IEEE802.11ac.
Background technology
WLAN (Wireless Local Area Networks; WLAN) be that the employing wireless communication technology is interconnected with computer equipment, formation can the mutual communication and the network system that realizes resource-sharing.The characteristics of WLAN essence are not re-use telecommunication cable computer and network is coupled together, but connect through wireless mode, thereby make structure and terminal mobile more flexible of network.IEEE802.11 is one of mainstream technology of present WLAN, and this agreement is mainly stipulated physical layer (PHY) and media interviews controls (MAC) layer standard.
Along with the development of mobile communication technology and people raising to the demand of wireless network; Physical layer specification constantly develops towards the increasingly high direction of speed; Experienced 802.11 and arrived 802.11a/g again to 802.11b, 802.11n then arrives the development course of 802.11ac at last.The actual physical technology also develops into the OFDM technology from direct sequence spread spectrum skill, and in IEEE802.11n, has introduced multi-antenna technology, in IEEE802.11ac, introduces big bandwidth and MU-MIMO.Do not confirm concrete MU-MIMO transmission plan at present as yet, the present invention has provided a kind of more detailed MU-MIMO transmission plan.
Summary of the invention
The technical problem that the present invention will solve provides a kind of multiuser transmission method and access point, realizes multi-user's transmission.
In order to address the above problem, the invention provides a kind of multiuser transmission method, comprising:
Access point (AP) is preengage the channel occupancy time in its coverage, and/or, said AP and website (STA) the reservation channel that will carry out multi-user's transmission;
After channel booking was accomplished, said AP sent multi-user data.
Further, said method also can have following characteristics, and said method comprises that also said AP receives the analysis result to said multi-user data of said STA feedback.
Further, said method also can have following characteristics, and said AP sends (CTS-To-Self) frame in its coverage reservation channel occupancy time through the request that sends to oneself.
Further, said method also can have following characteristics, and the Channel Transmission time of said channel occupancy time and/or said AP and said STA reservation guarantees to accomplish the multi-user data transmission and the feedback of this multi-user's transmission at least.
Further, said method also can have following characteristics, and said AP sends (RTS) frame and clear to send (CTS) frame and the said STA reservation channel that will carry out multi-user's transmission through request.
Further; Said method also can have following characteristics; Said AP preengages channel occupancy time through multi-user's clear to send (MU-CTS) frame in its coverage; Said MU-CTS frame comprises frame control domain, duration field, receiver address territory and Frame Check Sequence territory at least, and wherein: this frame of indication is the MU-CTS frame in the said frame control domain; Said duration field carries the channel occupancy time of reservation; The site identifier of this multi-user's transmission is carried in said receiver address territory; Frame Check Sequence is carried in said Frame Check Sequence territory.
Further, said method also can have following characteristics, and said frame control domain is based on the frame control domain definition of CTS frame, and indicating present frame through following mode in the said frame control domain is the MU-CTS frame:
Use the frame type of CTS frame type indication territory and unused bits position joint instructions MU-CTS frame, said unused bits position refers to that when frame type is the CTS frame value does not have the bit of influence in the frame control domain to the CTS frame.
Further, said method also can have following characteristics, and said AP comprises with the STA reservation channel that will carry out multi-user's transmission:
The STA that indicates in the said receiver address territory sends the CTS frame successively to said AP.
Further, said method also can have following characteristics, and the order that said STA sends the CTS frame and the site identifier of said STA putting in order in said receiver address territory is identical.
Further, said method also can have following characteristics, and in the said receiver address territory, in the corresponding site identifier of secondary service, said primary business was meant the business that obtains channel occupancy power through competition before primary professional corresponding site identifier was arranged.
Further, said method also can have following characteristics, and the numerical value of the whole representative in said receiver address territory and the medium access address of the STA in its coverage are inequality.
Further, said method also can have following characteristics, includes only the data of preengaging the successful STA of channel with said AP in the said multi-user data that said AP sends.
Further, said method also can have following characteristics, before said AP sends said multi-user data, judges also whether AP is successful with at least one primary professional corresponding STA reservation channel, if just send said multi-user data; Said primary business is meant the business that obtains channel occupancy power through competition.
Further; Said method also can have following characteristics; The feedback designation data that said AP receives at least one primary professional STA receives mistake, perhaps, and when said AP does not receive the feedback of all primary professional STA; Said AP retransmits, and said primary business is meant the business that obtains channel occupancy power through competition.
Further, said method also can have following characteristics, when said AP retransmits, sends the data retransmission of the STA of a preceding error of transmission; Perhaps, send data retransmission and the preceding new data that once transmits correct STA of the STA of a preceding error of transmission.
Further; Said method also can have following characteristics; Said AP stops channel occupancy when satisfying one of following condition: do not have primary service needed transmission, the perhaps said channel occupancy time finishes, and perhaps can not accomplish the multi-user data transmission course of one whole remaining time; Said primary business is meant the business that obtains channel occupancy power through competition.
The present invention also provides a kind of access point, and said access point (AP) comprising: reservation unit and data transmission unit, wherein,
Said reservation unit is used for the reservation channel occupancy time in said AP coverage; And/or, with website (STA) the reservation channel that will carry out multi-user's transmission;
Said data transmission unit is used for after channel booking is accomplished in the reservation unit, sending multi-user data.
Further, above-mentioned access point also can have following characteristics, and said data transmission unit also is used to receive the analysis result to said multi-user data of said STA feedback.
Further, above-mentioned access point also can have following characteristics, and said reservation unit is to be used for through the CTS-To-Self frame in its coverage reservation channel occupancy time; And, send (RTS) frame and clear to send (CTS) frame and the said STA reservation channel that will carry out multi-user's transmission through request.
Further; Above-mentioned access point also can have following characteristics; Said reservation unit is to be used for preengaging the said channel occupancy time through the MU-CTS frame in its coverage; Said MU-CTS frame comprises frame control domain, duration field, receiver address territory and Frame Check Sequence territory at least, and wherein: this frame of indication is the MU-CTS frame in the said frame control domain; Said duration field carries the channel occupancy time of reservation; The site identifier of this multi-user's transmission is carried in said receiver address territory; Frame Check Sequence is carried in said Frame Check Sequence territory.
Further, above-mentioned access point also can have following characteristics, and said frame control domain is based on the frame control domain definition of CTS frame, and indicating present frame through following mode in the said frame control domain is the MU-CTS frame:
Said frame control domain is based on the frame control domain definition of CTS frame, and indicating present frame through following mode in the said frame control domain is the MU-CTS frame:
Use the frame type of CTS frame type indication territory and unused bits position joint instructions MU-CTS frame, said unused bits position refers to that when frame type is the CTS frame value does not have the bit of influence in the frame control domain to the CTS frame.
Further, above-mentioned access point also can have following characteristics, and said reservation unit is to be used for sending completion of CTS frame and the said STA reservation channel that will carry out multi-user's transmission through receiving the STA that indicates in said receiver address territory.
Further, above-mentioned access point also can have following characteristics, and in the said receiver address territory, in the corresponding site identifier of secondary service, said primary business was meant the business that obtains channel occupancy power through competition before primary professional corresponding site identifier was arranged.
Further, above-mentioned access point also can have following characteristics, includes only the data of preengaging the successful STA of channel with said reservation unit in the said multi-user data that said data transmission unit sends.
Further; Above-mentioned access point also can have following characteristics, before said data transmission unit also is used to send said multi-user data, judges whether said reservation unit is successful with at least one primary professional corresponding STA reservation channel; If just send said multi-user data; Said primary business is meant the business that obtains channel occupancy power through competition.
Further; Above-mentioned access point also can have following characteristics; Said data transmission unit also is used for: the feedback designation data that receives at least one primary professional STA receives mistake, perhaps, and when not receiving the feedback of all primary professional STA; Retransmit, said primary business is meant the business that obtains channel occupancy power through competition.
Further; Above-mentioned access point also can have following characteristics; Said reservation unit also is used for when satisfying one of following condition, stopping channel occupancy: do not have primary service needed transmission; The perhaps said channel occupancy time finishes, and perhaps can not accomplish the multi-user data transmission course of one whole remaining time; Said primary business is meant the business that obtains channel occupancy power through competition.
A kind of multiuser transmission method provided by the invention and access point have been realized multi-user's transmission.
Embodiment
Multiuser transmission method provided by the invention comprises:
Access point (AP) is preengage one channel occupancy period in its coverage; And/or AP carries out channel booking with the website (STA) that each is about to carry out multi-user's transmission respectively;
After channel booking was accomplished, AP sent multi-user data;
STA receives and resolves the multi-user data that AP sends, and analysis result is fed back to AP.
Preferably, reserving method one: AP carries out the channel booking in its coverage through CTS-To-Self (request of issuing oneself is sent) frame; The channel occupancy time that AP preengages in its coverage guarantees to accomplish this multi-user's data packets for transmission at least and sends and feedback; AP accomplishes the channel booking that is about to carry out the STA that the multi-user transmits with each through RTS (Request to Send, request send)/CTS (Clear to Send, clear to send) frame exchange; The Channel Transmission time that AP and each are about to carry out the STA reservation of multi-user's transmission guarantees to accomplish this multi-user's data packets for transmission at least and sends and feedback;
The present invention also provides a kind of new frame type; Be called multi-user's clear to send (MU-CTS) frame; This frame comprises four territories, is referred to as frame control (Frame Control) territory, duration (Duration) territory, receiver address (RA:receiver address) territory and Frame Check Sequence (FCS:frame check sequence) territory respectively.Wherein, the frame control domain takies 2 bytes, and duration field takies 2 bytes, and the receiver address territory takies 6 bytes, and the Frame Check Sequence territory takies 4 bytes.Each territory takies byte number and is merely example here, can revise as required, and the present invention does not limit this.Wherein:
The definition of existing standard is still adopted in the division of frame control domain; Can be based on the frame control domain definition of CTS frame; And frame type and subtype bit-identify are the CTS frame, from the frame control domain, choose one or more bits, and the principle of choosing is when frame type is the CTS frame; The value of these bits has no effect to this frame; In the bit of choosing, select one and be defined as new frame type indicating bit, can be referred to as MU-CTS frame type position, other bits in the frame control domain comprise choose but not with its as bit of new frame type indicating bit all by the implication use of existing standard definition; Indicate a current whether MU-CTS frame through CTS frame indication territory (frame type position and subtype position) and new frame type indicating bit; When the indication of frame type position and subtype position is current is the CTS frame; And new frame type indicating bit indication is current when being the MU-CTS frame (such as; New frame type indicating bit value is 1), then present frame is the MU-CTS frame.
Duration field is still represented channel occupancy time of preengaging;
The receiver address territory is used to indicate the site identifier of this multi-user's transmission;
The Frame Check Sequence territory is calculated according to existing standard and is obtained.
Preferably, reserving method two: AP carries out the channel booking in its coverage through the MU-CTS frame; STA indicated in the RA territory of AP and said MU-CTS frame accomplishes channel booking through following mode: indicated STA sends the CTS frame successively to said AP in the said RA territory; Accomplish channel booking, the MAC Address of AP is filled in the RA territory in the CTS frame that said STA sends;
Preferably, the identifier of the STA of primary professional correspondence is arranged preceding in the corresponding site identifier of secondary service; Said primary business is meant the business that obtains channel occupancy power through competition;
Preferably, STA transmission CTS frame is AID the putting in order in the RA territory of MU-CTS frame of STA to the order of AP;
Preferably, the numerical value of the whole representative in the RA territory of MU-CTS frame can not be identical with the MAC Address of site STA in its coverage;
Preferably, only comprise the data of carrying out the successful STA of channel booking with AP in the multi-user data bag that AP sends;
Preferably, AP and each are about to carry out in the STA channel booking process of multi-user's transmission, as long as successful with one of them primary professional corresponding STA channel booking, can proceed this multi-user's transmission; Said primary business is meant the business that obtains channel occupancy power through competition;
Preferably, AP does not confirm feedback information as long as receive any primary professional STA, perhaps receives and confirms that any primary professional website confirms that the feedback information indication receives error in data, can trigger the AP retransmission operation immediately in the feedback information;
Preferably, comprise the data retransmission of the STA that makes mistakes in the AP retransmission data packet may, perhaps comprise the new data of STA of data retransmission and the correct transmission data of the STA that makes mistakes.
If there is not primary service needed transmission; Perhaps the channel occupancy time through the reservation of CTS-To-Self frame finishes; Perhaps can not accomplish the multi-user data transmission course of one whole remaining time, as long as satisfy in top three conditions any one, AP stops channel occupancy.
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.Under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Embodiment one
Suppose that the current data that have 3 STA need AP to send, 3 STA are referred to as STA1, STA2 and STA3 respectively, and wherein the data of STA1 and STA2 are primary business datums, and the data of STA3 are secondary service data, and 3 STA can carry out multi-user's transmission.According to method of the present invention, concrete multiuser transmission method is following:
At first AP sends the STA in CTS-To-Self frame to its coverage; In the present embodiment; Suppose that the channel booking time that is comprised in the CTS-To-Self frame can only guarantee to accomplish multi-user's transmission of one whole, comprise that channel booking holding time, multi-user data bag transmission holding time, 3 STA that AP and 3 STA carry out through RTS/CTS reply the holding time of confirmations and the interFrameGap times of each radio frames transmission;
STA in the AP coverage receives the channel booking time that comprises in this frame of can obtaining after the CTS-To-Self frame, at this moment between in the section STA can not seize channel;
AP waits for a SIFS (Short Interframe Space after sending the CTS-To-Self frame; Short interFrameGap) time, send a RTS frame, wherein the MAC Address of STA1 is filled in the receiver address territory in the RTS frame; STA1 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA1 sends between AP and the STA1 at the fixed time;
AP receives the CTS frame of STA1 answer and waits for a SIFS time more afterwards, sends second RTS frame, and the MAC Address of STA2 is filled in the receiver address territory in this RTS frame, and STA2 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA2 sends between AP and the STA2 at the fixed time;
AP receives the CTS frame of STA2 answer and waits for a SIFS time more afterwards, sends the 3rd RTS frame, and the MAC Address of STA3 is filled in the receiver address territory in this RTS frame, and STA3 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA3 sends between AP and the STA3 at the fixed time;
AP receives the CTS frame of STA3 answer and waits for a SIFS time more afterwards, sends the multi-user data frame, comprises the data of 3 site STA 1, STA2, STA3 in this multi-user data frame.
After STA1 received this multi-user data frame, dissection process was waited for a SIFS after the time, replied confirmation (ACK), and designation data receives correct;
After STA2 received this multi-user data frame, dissection process was waited for two SIFS times and an ACK after the processing time, replied confirmation (ACK), and designation data receives correct;
After STA3 received Frame, dissection process was waited for three SIFS times and two ACK after the processing time, replied confirmation (ACK), and designation data receives correct;
AP receives the ACK information of 3 STA, and all designation data transmission is correct, can judge that so this multi-user transmits correct completion.
If there is not primary service needed transmission; Perhaps the channel occupancy time through the reservation of CTS-To-Self frame finishes; Perhaps can not accomplish the multi-user data transmission course of one whole remaining time, as long as satisfy in top three conditions any one, AP can stop channel occupancy power.
In the present embodiment,,, weighs AP so stopping channel occupancy owing to the multi-user data transmission course that perhaps can not accomplish one whole through the channel occupancy time end of CTS-To-Self frame reservation remaining time.
Embodiment two
Suppose that the current data that have 3 STA need AP to send, 3 STA are referred to as STA1, STA2 and STA3 respectively, and wherein the data of STA1 and STA2 are primary business datums, and the data of STA3 are secondary service data, and 3 STA can carry out multi-user's transmission.Wherein the data of STA1 and STA3 need twice multi-user to transmit and could accomplish, and the data of STA2 need once transmission to accomplish.According to method of the present invention, concrete multiuser transmission method is following:
At first AP sends a CTS-To-Self frame; The subscription time that is comprised in the CTS-To-Self frame can guarantee to accomplish above multi-user's transmission course twice, comprises AP and 3 channel booking holding time, multi-user data bag transmission holding time, the holding time of 3 STA answer confirmations and interFrameGap times that each radio frames is sent that STA carries out through RTS/CTS;
STA in the AP coverage receives the channel booking time that comprises in this frame of can obtaining after the CTS-To-Self frame, at this moment between in the section STA can not seize channel;
AP waits for a SIFS time after sending the CTS-To-Self frame, sends a RTS frame, and wherein the MAC Address of STA1 is filled in the receiver address territory in the RTS frame, and STA1 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA1 sends between AP and the STA1 at the fixed time;
AP receives the CTS frame of STA1 answer and waits for a SIFS time more afterwards, sends second RTS frame, and the MAC Address of STA2 is filled in the receiver address territory in this RTS frame, and STA2 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA2 sends between AP and the STA2 at the fixed time;
AP receives the CTS frame of STA2 answer and waits for a SIFS time more afterwards, sends the 3rd RTS frame, and the MAC Address of STA3 is filled in the receiver address territory in this RTS frame, and STA3 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA3 sends between AP and the STA3 at the fixed time;
AP receives the CTS frame of STA3 answer and waits for a SIFS time more afterwards, sends the multi-user data frame, comprises the data of 3 websites in this multi-user data frame.
After STA1 received this multi-user data frame, dissection process was waited for a SIFS after the time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA2 received this multi-user data frame, dissection process was waited for two SIFS times and an ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA3 received this multi-user data frame, dissection process was waited for three SIFS times and two ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
AP receives the affirmation information A CK of 3 STA, and all designation data transmission is correct, can judge that so this multi-user transmits correct completion.
This moment, primary business still had data to need transmission; And the channel occupancy time through the CTS-To-Self reservation can also guarantee to accomplish a multi-user data transmission; So AP receives the ACK of STA3 transmission and waits for a SIFS time more afterwards; Transmit a new multi-user data frame immediately, only comprise the data of STA1 and STA3 in this multi-user data frame;
After STA1 received the multi-user data frame, dissection process was waited for a SIFS after the time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA3 received the multi-user data frame, dissection process was waited for two SIFS times and an ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
AP receives the affirmation information A CK of 2 STA (STA1 and STA3), and all designation data transmission is correct, can judge that so this multi-user transmits correct completion.
There is not primary service needed transmission this moment.
There is not primary service needed transmission; Perhaps the channel occupancy time through the reservation of CTS-To-Self frame finishes; Perhaps can not accomplish the multi-user data transmission course of one whole remaining time, as long as satisfy in top three conditions any one, AP can stop channel occupancy power.
In the present embodiment, owing to there is not primary service needed transmission, AP stops channel occupancy power.
Embodiment three
Suppose that the current data that have 3 STA need AP to send, 3 STA are referred to as STA1, STA2 and STA3 respectively, and wherein the data of STA1 and STA2 are primary business datums, and the data of STA3 are secondary service data, and 3 STA can carry out multi-user's transmission.Wherein the data of STA1 and STA2 need once transmission to accomplish, and the data of STA3 need twice multi-user to transmit and could accomplish.According to method of the present invention, concrete multiuser transmission method is following:
At first AP sends a CTS-To-Self frame; The subscription time that is comprised in the CTS-To-Self frame can guarantee to accomplish repeatedly multi-user's transmission course, comprises AP and 3 channel booking holding time, multi-user data bag transmission holding time, the holding time of 3 STA answer confirmations and interFrameGap times that each radio frames is sent that STA carries out through RTS/CTS;
STA in the AP coverage receives the channel booking time that comprises in this frame of can obtaining after the CTS-To-Self frame, at this moment between in the section STA can not seize channel;
AP waits for a SIFS time after sending the CTS-To-Self frame, sends a RTS frame, and wherein the MAC Address of STA1 is filled in the receiver address territory in the RTS frame, and STA1 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA1 sends between AP and the STA1 at the fixed time;
AP receives the CTS frame of STA1 answer and waits for a SIFS time more afterwards, sends second RTS frame, and the MAC Address of STA2 is filled in the receiver address territory in this RTS frame, and STA2 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA2 sends between AP and the STA2 at the fixed time;
AP receives the CTS frame of STA2 answer and waits for a SIFS time more afterwards, sends the 3rd RTS frame, and the MAC Address of STA3 is filled in the receiver address territory in this RTS frame, and STA3 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA3 sends between AP and the STA3 at the fixed time;
AP receives the CTS frame of STA3 answer and waits for a SIFS time more afterwards, sends the multi-user data frame, comprises the data of 3 websites in this multi-user data frame.
After STA1 received this multi-user data frame, dissection process was waited for a SIFS after the time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA2 received this multi-user data frame, dissection process was waited for two SIFS times and an ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA3 received this multi-user data frame, dissection process was waited for three SIFS times and two ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
AP receives the affirmation information A CK of 3 STA (STA1, STA2 and STA3), and all designation data transmission is correct, can judge that so this multi-user transmits correct completion.
This moment, primary business had new data to need transmission; These data belong to new site STA 4; And do not finish and be enough to remaining time guarantee the multi-user data transmission course of one whole through the channel occupancy time that the CTS-To-Self frame is preengage; Also have simultaneously secondary service to need transmission, wherein a part of secondary service belongs to as yet the site STA 3 that not transmission is accomplished, and another part belongs to new site STA5; But STA3 and STA4 can not carry out multi-user's transmission; STA4 and STA5 can carry out multi-user's transmission; So AP receives the ACK of STA3 transmission and waits for a SIFS time more afterwards, sends a RTS frame immediately, wherein the MAC Address of STA4 is filled in the receiver address territory in the RTS frame; STA4 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA4 sends between AP and the STA4 at the fixed time;
AP receives the CTS frame of STA4 answer and waits for a SIFS time more afterwards, sends second RTS frame, and the MAC Address of STA5 is filled in the receiver address territory in this RTS frame, and STA5 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA5 sends between AP and the STA5 at the fixed time;
AP receives the CTS frame of STA5 answer and waits for a SIFS time more afterwards, sends the multi-user data frame, comprises the data of 2 websites in this multi-user data frame, i.e. the data of STA4 and STA5.
After STA4 received this multi-user data frame, dissection process was waited for a SIFS after the time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA5 received this multi-user data frame, dissection process was waited for two SIFS times and an ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
AP receives the affirmation information A CK of STA4 and STA5, and all designation data transmission is correct, can judge that so this multi-user transmits correct completion.
Though still have the secondary service data that belong to STA3 to transmit this moment; And the channel occupancy time of CTS-To-Self frame reservation does not finish and also is enough to remaining time guarantee the multi-user data transmission course of one whole; But do not have primary professional data to need transmission, so AP stops channel occupancy power.
Embodiment four
Suppose in this MU-MIMO transmission that comprise the data of 3 STA altogether, 3 STA are referred to as STA1, STA2 and STA3 respectively, wherein the data of STA1 and STA2 are primary business datums, and the data of STA3 are secondary service data.According to method of the present invention, concrete multiuser transmission method is following:
At first AP sends a CTS-To-Self frame; The subscription time that is comprised in the CTS-To-Self frame can guarantee to accomplish multi-user's transmission of one whole, comprises AP and 3 channel booking holding time, multi-user data bag transmission holding time, the holding time of 3 STA answer confirmations and interFrameGap times that each radio frames is sent that STA carries out through RTS/CTS;
STA in the AP coverage receives the channel booking time that comprises in this frame of can obtaining after the CTS-To-Self frame, at this moment between in the section STA can not seize channel;
AP waits for a SIFS time after sending the CTS-To-Self frame, sends a RTS frame, and what wherein filled in the receiver address territory in the RTS frame is the MAC Address of STA1, and STA1 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA1 sends between AP and the STA1 at the fixed time;
AP receives the CTS frame of STA1 answer and waits for a SIFS time more afterwards, sends second RTS frame, and the MAC Address of STA2 is filled in the receiver address territory in this RTS frame;
AP does not receive the CTS frame that STA2 sends at the fixed time; After a very short delta time-delay, send the 3rd RTS frame, the MAC Address of STA3 is filled in the receiver address territory in this RTS frame; STA3 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA3 sends between AP and the STA3 at the fixed time;
AP waits for a SIFS after the time again, sends the multi-user data frame, because AP and STA2 reservation channel are unsuccessful, the data that only comprise 2 websites in this multi-user data frame are the data of STA1 and STA3.
After STA1 received this multi-user data frame, dissection process was waited for a SIFS after the time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA3 received this multi-user data frame, dissection process was waited for two SIFS times and an ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
AP receives the affirmation information A CK of 2 STA (STA1 and STA2), and all designation data transmission is correct, can judge that so this multi-user transmits correct completion.
This moment, primary business still had the data that need transmission; Be the data of STA2; And the multi-user data transmission course that can guarantee to accomplish one whole remaining time of the channel occupancy time through CTS-To-Self frame reservation, so after AP receives the ACK of STA3, wait for that a SIFS is after the time; Send the RTS frame, the MAC Address of STA2 is filled in the receiver address territory in this RTS frame;
AP receives the channel booking success of promptly thinking behind the CTS frame that STA2 sends between AP and the STA2 at the fixed time;
Because have only the primary business to STA2 this moment, and do not have the secondary service transfer of data, so AP waits for a SIFS time after receiving the CTS frame of STA2 transmission again, send a multi-user data frame, only comprise the data of STA2 in this multi-user data frame;
After STA2 received this multi-user data frame, dissection process was waited for a SIFS after the time, replied confirmation ACK, and the confirmation designation data receives correct;
After AP receives the affirmation information A CK that STA2 sends in the given time, and the transmission of ACK designation data is correct, can judge that so this multi-user transmits correct completion.
Still can guarantee to accomplish the multi-user data transmission course of one whole the remaining time of this moment through the channel occupancy time of CTS-To-Self frame reservation, but do not have primary service needed transmission, so AP stops channel occupancy power.
Embodiment five
Suppose in this MU-MIMO transmission that comprise the data of 3 STA altogether, 3 STA are referred to as STA1, STA2 and STA3 respectively, wherein the data of STA1 and STA2 are primary business datums, and the data of STA3 are secondary service data.According to method of the present invention, concrete multiuser transmission method is following:
At first AP sends a CTS-To-Self frame; The subscription time that is comprised in the CTS-To-Self frame can only guarantee to accomplish multi-user's transmission of one whole, comprises AP and 3 channel booking holding time, multi-user data bag transmission holding time, the holding time of 3 STA answer confirmations and interFrameGap times that each radio frames is sent that STA carries out through RTS/CTS;
STA in the AP coverage receives the channel booking time that comprises in this frame of can obtaining after the CTS-To-Self frame, at this moment between in the section STA can not seize channel;
AP waits for a SIFS time after sending the CTS-To-Self frame; Send a RTS frame; Wherein the MAC Address of STA1 is filled in the receiver address territory in the RTS frame, and AP does not receive the CTS frame of STA1 at the fixed time, thinks that promptly the channel booking between AP and the STA1 is unsuccessful;
The SIFS time that AP has sent behind first RTS frame is not received CTS; Send second RTS frame after waiting for a delta again; The MAC Address of STA2 is filled in receiver address territory in this RTS frame; AP does not receive the CTS frame of STA2 at the fixed time, thinks that promptly the channel booking between AP and the STA2 is unsuccessful;
Because the channel booking of corresponding all STA of primary business all gets nowhere in AP and this multi-user transmission; The channel occupancy time of CTS-To-Self frame reservation this moment does not finish but is not enough to guarantee the multi-user data transmission course of one whole remaining time, weighs so AP abandons channel occupancy.
Embodiment six
Suppose that the current data that have 3 STA need AP to send; 3 STA are referred to as STA1, STA2 and STA3 respectively; Wherein the data of STA1 and STA2 are primary business datums; The data of STA3 are secondary service data, and 3 STA can carry out multi-user's transmission, and all need twice multi-user to transmit could to accomplish data to send.According to method of the present invention, concrete multiuser transmission method is following:
At first AP sends a CTS-To-Self frame; The subscription time that is comprised in the CTS-To-Self frame can guarantee to accomplish repeatedly multi-user's transmission course, comprises AP and 3 channel booking holding time, multi-user data bag transmission holding time, the holding time of 3 STA answer confirmations and interFrameGap times that each radio frames is sent that STA carries out through RTS/CTS;
STA in the AP coverage receives the channel booking time that comprises in this frame of can obtaining after the CTS-To-Self frame, at this moment between in the section STA can not seize channel;
AP waits for a SIFS time after sending the CTS-To-Self frame, sends a RTS frame, and wherein the MAC Address of STA1 is filled in the receiver address territory in the RTS frame, and STA1 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA1 sends between AP and the STA1 at the fixed time;
AP receives the CTS frame of STA1 answer and waits for a SIFS time more afterwards, sends second RTS frame, and the MAC Address of STA2 is filled in the receiver address territory in this RTS frame, and STA2 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA2 sends between AP and the STA2 at the fixed time;
AP receives the CTS frame of STA2 answer and waits for a SIFS time more afterwards, sends the 3rd RTS frame, and the MAC Address of STA3 is filled in the receiver address territory in this RTS frame, and STA3 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA3 sends between AP and the STA3 at the fixed time;
AP receives the CTS frame of STA3 answer and waits for a SIFS time more afterwards, sends the multi-user data frame, comprises the data of 3 websites in this multi-user data frame.
After STA1 received this multi-user data frame, dissection process was waited for a SIFS after the time, replied confirmation ACK, and the confirmation designation data receives mistake;
After STA2 received this multi-user data frame, dissection process was waited for two SIFS times and an ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA3 received this multi-user data frame, dissection process was waited for three SIFS times and two ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
AP receives the affirmation information A CK of 3 STA, and one of them primary business data transmission mistake is that STA1 receives mistake, because be primary business, so need re-transmission immediately.
The channel occupancy time of preengaging through the CTS-To-Self frame this moment does not finish and is enough to remaining time guarantee the multi-user data transmission course of one whole;
AP waits for a SIFS time after receiving the ACK frame that STA3 replys again, only sends feedback and wrong data occur, be i.e. the STA1 data of launching first.
After STA1 received Frame, dissection process was waited for a SIFS after the time, replied confirmation ACK, and the confirmation designation data receives correct;
AP receives the affirmation information A CK of STA1, and indication retransmits correct;
The channel occupancy time of preengaging through the CTS-To-Self frame this moment does not finish and still is enough to remaining time guarantee the multi-user data transmission course of one whole;
So AP waits for that after receiving the affirmation information A CK of STA1 a SIFS after the time, sends a new multi-user data frame, comprises 3 remaining data of STA in this multi-user data frame.
After STA1 received this multi-user data frame, dissection process was waited for a SIFS after the time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA2 received this multi-user data frame, dissection process was waited for two SIFS times and an ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA3 received this multi-user data frame, dissection process was waited for three SIFS times and two ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives mistake;
The channel occupancy time of preengaging through the CTS-To-Self frame this moment does not finish and still is enough to remaining time guarantee the multi-user data transmission course of one whole; But the transfer of data of top priority is accomplished and is not had new primary service needed and transmits at this moment; Though the data transmission fault of STA3, these data do not belong to primary business; According to method of the present invention, AP stops channel occupancy power.
Embodiment seven
Suppose that the current data that have 3 STA need AP to send; 3 STA are referred to as STA1, STA2 and STA3 respectively; Wherein the data of STA1 and STA2 are primary business datums; The data of STA3 are secondary service data, and 3 STA can carry out multi-user's transmission, and all need twice multi-user to transmit could to accomplish data to send.According to method of the present invention, concrete multiuser transmission method is following:
At first AP sends a CTS-To-Self frame; The subscription time that is comprised in the CTS-To-Self frame can guarantee to accomplish repeatedly multi-user's transmission course, comprises AP and 3 channel booking holding time, multi-user data bag transmission holding time, the holding time of 3 STA answer confirmations and interFrameGap times that each radio frames is sent that STA carries out through RTS/CTS;
STA in the AP coverage receives the channel booking time that comprises in this frame of can obtaining after the CTS-To-Self frame, at this moment between in the section STA can not seize channel;
AP waits for a SIFS time after sending the CTS-To-Self frame, sends a RTS frame, and wherein the MAC Address of STA1 is filled in the receiver address territory in the RTS frame, and STA1 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA1 sends between AP and the STA1 at the fixed time;
AP receives the CTS frame of STA1 answer and waits for a SIFS time more afterwards, sends second RTS frame, and the MAC Address of STA2 is filled in the receiver address territory in this RTS frame, and STA2 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA2 sends between AP and the STA2 at the fixed time;
AP receives the CTS frame of STA2 answer and waits for a SIFS time more afterwards, sends the 3rd RTS frame, and the MAC Address of STA3 is filled in the receiver address territory in this RTS frame, and STA3 receives that SIFS of this RTS frame wait after the time, replys the CTS frame to AP; AP receives the channel booking success of promptly thinking behind the CTS frame that STA3 sends between AP and the STA3 at the fixed time;
AP receives the CTS frame of STA3 answer and waits for a SIFS time more afterwards, sends the multi-user data frame, comprises the data of 3 websites in this multi-user data frame.
After STA1 received this multi-user data frame, dissection process was waited for a SIFS after the time, replied confirmation ACK, and the confirmation designation data receives mistake;
After STA2 received this multi-user data frame, dissection process was waited for two SIFS times and an ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA3 received this multi-user data frame, dissection process was waited for three SIFS times and two ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
AP receives the affirmation information A CK of 3 STA, and one of them primary business data transmission mistake is that STA1 receives mistake, because be primary business, so need re-transmission immediately.
The channel occupancy time of preengaging through the CTS-To-Self frame this moment does not finish and is enough to remaining time guarantee the multi-user data transmission course of one whole;
AP waits for a SIFS time after receiving the ACK frame that STA3 replys again, sends the multi-user data frame, comprises that the loading error occurring data are the data that data, STA2 and STA3 that STA1 launches first do not send as yet this moment in the multi-user data frame.
After STA1 received this multi-user data frame, dissection process was waited for a SIFS after the time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA2 received this multi-user data frame, dissection process was waited for two SIFS times and an ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA3 received Frame, dissection process was waited for three SIFS times and two ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
AP receives the affirmation information A CK of 3 STA, and indication is all transmitted correct;
The channel occupancy time of preengaging through the CTS-To-Self frame this moment does not finish and still is enough to remaining time guarantee the multi-user data transmission course of one whole; This moment, primary business and secondary service all had new data to need to send, and they belong to STA4 and STA3 respectively.
So AP waits for that after receiving the affirmation information A CK of STA3 a SIFS after the time, sends a new multi-user data frame, comprises 2 remaining data of STA in this multi-user data frame, promptly STA1 does not launch the data of data and the new STA3 that produces as yet.Though the data of STA4 are primary business datums and can carry out multi-user's transmission with STA1, STA3 that STA4 does not belong to front multi-user's transmission group and do not carry out channel booking, thereby transmission does not this time comprise the data of STA4.
After STA1 received the multi-user data frame, dissection process was waited for a SIFS after the time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA3 received the multi-user data frame, dissection process was waited for two SIFS times and an ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
AP receives the answer confirmation of 2 STA (being STA1 and STA3), and all indicates transmission correct.
The channel occupancy time of this moment through CTS-To-Self frame reservation do not finish but remaining time can not one whole the multi-user data transmission course; Though still there are the data of primary business to be transmitted, AP stops channel occupancy power.
Embodiment eight
Suppose that the current data that have 3 STA need AP to send, 3 STA are referred to as STA1, STA2 and STA3 respectively, and wherein the data of STA1 and STA3 are primary business datums, and the data of STA2 are secondary service data, and 3 STA can carry out multi-user's transmission.Have the equipment sta-n of original system in addition, original system can be systems such as 802.11n/a, and according to method of the present invention, concrete multiuser transmission method is following:
At first AP sends a MU-CTS frame; Frame type territory (Type) and subtype (Subtype) territory this frame of indication is the CTS frame in the frame control domain of MU-CTS frame; Selecting the frame control domain Central Plains MoreFrag bit of MU-CTS frame is MU-CTS frame type position; This bit is 1 to represent that promptly this frame type is the MU-CTS frame, is changed to 1 with it in this embodiment; The selected channel booking time that is comprised can only guarantee to accomplish multi-user's transmission of one whole, comprises that AP and 3 STA carry out the holding time of channel booking holding time, multi-user data bag transmission holding time, 3 STA answer confirmations and the interFrameGap time that each radio frames is sent respectively; The identifier of three STA is filled in the RA territory of MU-CTS frame successively; Order is STA1, STA3, STA2;
All receive the equipment of this MU-CTS frame in the AP coverage, all resolve this frame, and the equipment of original system is used as common CTS frame processing after receiving this frame, and the website of IEEE802.11ac can be handled according to the MU-CTS frame.
After STA1 receives this frame, judge that this frame is the MU-CTS frame, through resolving the RA territory, find that the identifier of oneself is present in the RA territory, and make number one then,, reply the CTS frame to AP so wait for a SIFS after the time according to the MU-CTS frame format; The address of filling in AP in the receiver address territory of CTS frame; AP receives the channel booking success of promptly thinking behind the CTS frame that STA1 sends between AP and the STA1 at the fixed time;
After STA2 receives this frame; Judge that this frame is the MU-CTS frame, through resolving the RA territory, find that the identifier of oneself is present in the RA territory then according to the MU-CTS frame format; And come the 3rd; So after waiting for three SIFS times and two CTS frame times, reply the CTS frame to AP, the address of filling in AP in the receiver address territory of this CTS frame; AP receives the channel booking success of promptly thinking behind the CTS frame that STA2 sends between AP and the STA2 at the fixed time;
After STA3 receives this frame; Judge that this frame is the MU-CTS frame, through resolving the RA territory, find that the identifier of oneself is present in the RA territory then according to the MU-CTS frame format; And come second; So after waiting for two SIFS times and CTS frame time, reply the CTS frame to AP, the address of filling in AP in the receiver address territory of CTS frame; AP receives the channel booking success of promptly thinking behind the CTS frame that STA3 sends between AP and the STA3 at the fixed time;
After sta-n receives this frame, judge that this frame is the CTS frame, handle, guarantee can not seize channel in indicated time period in the Duration territory by normal running.
AP receives the CTS frame of STA2 answer and waits for a SIFS time more afterwards, sends the multi-user data frame, comprises the data of 3 websites in this Frame.
After STA1 received Frame, dissection process was waited for a SIFS after the time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA3 received Frame, dissection process was waited for two SIFS times and an ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
After STA2 received Frame, dissection process was waited for three SIFS times and two ACK after the processing time, replied confirmation ACK, and the confirmation designation data receives correct;
AP receives the affirmation information A CK of 3 STA, and all designation data transmission is correct, can judge that so this multi-user transmits correct completion.
There is not primary service needed transmission; Perhaps the channel occupancy time through the reservation of MU-CTS frame finishes; Perhaps can not accomplish the multi-user data transmission course of one whole remaining time, as long as satisfy in top three conditions any one, AP can stop channel occupancy power.
In the present embodiment, the channel occupancy time through MU-CTS frame reservation finishes or can not accomplish remaining time the multi-user data transmission course of one whole, weighs so AP stops channel occupancy.
For the expense of saving time, in the channel booking process, interFrameGap can be the time less than SIFS.
The present invention also provides a kind of access point, and said access point (AP) comprising: reservation unit and data transmission unit, wherein,
Said reservation unit is used for the reservation channel occupancy time in said AP coverage; And/or, with website (STA) the reservation channel that will carry out multi-user's transmission;
Said data transmission unit is used for after channel booking is accomplished in the reservation unit, sending multi-user data.
Wherein, said data transmission unit also is used to receive the analysis result to said multi-user data of said STA feedback.
Wherein, said reservation unit is to be used for through the CTS-To-Self frame in its coverage reservation channel occupancy time; And, send (RTS) frame and clear to send (CTS) frame and the said STA reservation channel that will carry out multi-user's transmission through request.
Wherein, Said reservation unit is to be used for preengaging the said channel occupancy time through the MU-CTS frame in its coverage; Said MU-CTS frame comprises frame control domain, duration field, receiver address territory and Frame Check Sequence territory at least, and wherein: this frame of indication is the MU-CTS frame in the said frame control domain; Said duration field carries the channel occupancy time of reservation; The site identifier of this multi-user's transmission is carried in said receiver address territory; Frame Check Sequence is carried in said Frame Check Sequence territory.
Wherein, said frame control domain is based on the frame control domain definition of CTS frame, and indicating present frame through following mode in the said frame control domain is the MU-CTS frame:
Said frame control domain is based on the frame control domain definition of CTS frame, and indicating present frame through following mode in the said frame control domain is the MU-CTS frame:
Use the frame type of CTS frame type indication territory and unused bits position joint instructions MU-CTS frame, said unused bits position refers to that when frame type is the CTS frame value does not have the bit of influence in the frame control domain to the CTS frame.
Wherein, said reservation unit is to be used for sending completion of CTS frame and the said STA reservation channel that will carry out multi-user's transmission through receiving the STA that indicates in said receiver address territory.
Wherein, in the said receiver address territory, in the corresponding site identifier of secondary service, said primary business was meant the business that obtains channel occupancy power through competition before primary professional corresponding site identifier was arranged.
Wherein, include only the data of preengaging the successful STA of channel with said reservation unit in the said multi-user data that said data transmission unit sends.
Wherein, before said data transmission unit also is used to send said multi-user data, judge whether said reservation unit is successful with at least one primary professional corresponding STA reservation channel, if just send said multi-user data; Said primary business is meant the business that obtains channel occupancy power through competition.
Wherein, Said data transmission unit also is used for: the feedback designation data that receives at least one primary professional STA receives mistake, perhaps, and when not receiving the feedback of all primary professional STA; Retransmit, said primary business is meant the business that obtains channel occupancy power through competition.
Wherein, said reservation unit also is used for when satisfying one of following condition, stopping channel occupancy: do not have primary service needed transmission, the perhaps said channel occupancy time finishes, and perhaps can not accomplish the multi-user data transmission course of one whole remaining time; Said primary business is meant the business that obtains channel occupancy power through competition.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (27)
1. a multiuser transmission method is characterized in that, comprising:
Access point (AP) is preengage the channel occupancy time in its coverage, and/or, said AP and website (STA) the reservation channel that will carry out multi-user's transmission;
After channel booking was accomplished, said AP sent multi-user data.
2. the method for claim 1 is characterized in that, said method comprises that also said AP receives the analysis result to said multi-user data of said STA feedback.
3. the method for claim 1 is characterized in that,
Said AP sends (CTS-To-Self) frame in its coverage reservation channel occupancy time through the request that sends to oneself.
4. the method for claim 1 is characterized in that,
The Channel Transmission time of said channel occupancy time and/or said AP and said STA reservation guarantees to accomplish the multi-user data transmission and the feedback of this multi-user's transmission at least.
5. method as claimed in claim 3 is characterized in that,
Said AP sends (RTS) frame and clear to send (CTS) frame and the said STA reservation channel that will carry out multi-user's transmission through request.
6. the method for claim 1 is characterized in that,
Said AP preengages channel occupancy time through multi-user's clear to send (MU-CTS) frame in its coverage; Said MU-CTS frame comprises frame control domain, duration field, receiver address territory and Frame Check Sequence territory at least, and wherein: this frame of indication is the MU-CTS frame in the said frame control domain; Said duration field carries the channel occupancy time of reservation; The site identifier of this multi-user's transmission is carried in said receiver address territory; Frame Check Sequence is carried in said Frame Check Sequence territory.
7. method as claimed in claim 6 is characterized in that, said frame control domain is based on the frame control domain definition of CTS frame, and indicating present frame through following mode in the said frame control domain is the MU-CTS frame:
Use the frame type of CTS frame type indication territory and unused bits position joint instructions MU-CTS frame, said unused bits position refers to that when frame type is the CTS frame value does not have the bit of influence in the frame control domain to the CTS frame.
8. method as claimed in claim 6 is characterized in that,
Said AP comprises with the STA reservation channel that will carry out multi-user's transmission:
The STA that indicates in the said receiver address territory sends the CTS frame successively to said AP.
9. method as claimed in claim 8 is characterized in that,
The order that said STA sends the CTS frame and the site identifier of said STA putting in order in said receiver address territory is identical.
10. like the arbitrary described method of claim 6 to 9, it is characterized in that,
In the said receiver address territory, in the corresponding site identifier of secondary service, said primary business was meant the business that obtains channel occupancy power through competition before primary professional corresponding site identifier was arranged.
11., it is characterized in that the numerical value of the whole representative in said receiver address territory and the medium access address of the STA in its coverage are inequality like the arbitrary described method of claim 6 to 9.
12. like the arbitrary described method of claim 1 to 9, it is characterized in that,
Include only the data of preengaging the successful STA of channel with said AP in the said multi-user data that said AP sends.
13. like the arbitrary described method of claim 1 to 9, it is characterized in that,
Before said AP sends said multi-user data, judge also whether AP is successful with at least one primary professional corresponding STA reservation channel, if just send said multi-user data; Said primary business is meant the business that obtains channel occupancy power through competition.
14. like the arbitrary described method of claim 1 to 9; It is characterized in that; The feedback designation data that said AP receives at least one primary professional STA receives mistake, perhaps, and when said AP does not receive the feedback of all primary professional STA; Said AP retransmits, and said primary business is meant the business that obtains channel occupancy power through competition.
15. method as claimed in claim 14 is characterized in that, when said AP retransmits, sends the data retransmission of the STA of a preceding error of transmission; Perhaps, send data retransmission and the preceding new data that once transmits correct STA of the STA of a preceding error of transmission.
16. like the arbitrary described method of claim 1 to 9, it is characterized in that,
Said AP stops channel occupancy when satisfying one of following condition: do not have primary service needed transmission, the perhaps said channel occupancy time finishes, and perhaps can not accomplish the multi-user data transmission course of one whole remaining time; Said primary business is meant the business that obtains channel occupancy power through competition.
17. an access point is characterized in that, said access point (AP) comprising: reservation unit and data transmission unit, wherein,
Said reservation unit is used for the reservation channel occupancy time in said AP coverage; And/or, with website (STA) the reservation channel that will carry out multi-user's transmission;
Said data transmission unit is used for after channel booking is accomplished in the reservation unit, sending multi-user data.
18. access point as claimed in claim 17 is characterized in that, said data transmission unit also is used to receive the analysis result to said multi-user data of said STA feedback.
19. access point as claimed in claim 17 is characterized in that, said reservation unit is to be used for through the CTS-To-Self frame in its coverage reservation channel occupancy time; And, send (RTS) frame and clear to send (CTS) frame and the said STA reservation channel that will carry out multi-user's transmission through request.
20. access point as claimed in claim 17 is characterized in that,
Said reservation unit is to be used for preengaging the said channel occupancy time through the MU-CTS frame in its coverage; Said MU-CTS frame comprises frame control domain, duration field, receiver address territory and Frame Check Sequence territory at least, and wherein: this frame of indication is the MU-CTS frame in the said frame control domain; Said duration field carries the channel occupancy time of reservation; The site identifier of this multi-user's transmission is carried in said receiver address territory; Frame Check Sequence is carried in said Frame Check Sequence territory.
21. access point as claimed in claim 20 is characterized in that, said frame control domain is based on the frame control domain definition of CTS frame, and indicating present frame through following mode in the said frame control domain is the MU-CTS frame:
Said frame control domain is based on the frame control domain definition of CTS frame, and indicating present frame through following mode in the said frame control domain is the MU-CTS frame:
Use the frame type of CTS frame type indication territory and unused bits position joint instructions MU-CTS frame, said unused bits position refers to that when frame type is the CTS frame value does not have the bit of influence in the frame control domain to the CTS frame.
22. access point as claimed in claim 20 is characterized in that,
Said reservation unit is to be used for accomplishing and the said STA reservation channel that will carry out multi-user's transmission through the CTS frame that receives the STA transmission of indicating in said receiver address territory.
23. like claim 20,21 or 22 described access points, it is characterized in that,
In the said receiver address territory, in the corresponding site identifier of secondary service, said primary business was meant the business that obtains channel occupancy power through competition before primary professional corresponding site identifier was arranged.
24. like the arbitrary described access point of claim 17 to 22, it is characterized in that,
Include only the data of preengaging the successful STA of channel with said reservation unit in the said multi-user data that said data transmission unit sends.
25. like the arbitrary described access point of claim 17 to 22, it is characterized in that,
Before said data transmission unit also is used to send said multi-user data, judge whether said reservation unit is successful with at least one primary professional corresponding STA reservation channel, if just send said multi-user data; Said primary business is meant the business that obtains channel occupancy power through competition.
26. like the arbitrary described access point of claim 17 to 22; It is characterized in that; Said data transmission unit also is used for: the feedback designation data that receives at least one primary professional STA receives mistake, perhaps, and when not receiving the feedback of all primary professional STA; Retransmit, said primary business is meant the business that obtains channel occupancy power through competition.
27. like the arbitrary described access point of claim 17 to 22, it is characterized in that,
Said reservation unit also is used for when satisfying one of following condition, stopping channel occupancy: do not have primary service needed transmission, the perhaps said channel occupancy time finishes, and perhaps can not accomplish the multi-user data transmission course of one whole remaining time; Said primary business is meant the business that obtains channel occupancy power through competition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN113473615A (en) * | 2020-03-30 | 2021-10-01 | 华为技术有限公司 | Scheduling method and device of air interface resources |
| WO2023123598A1 (en) * | 2021-12-31 | 2023-07-06 | 上海物骐微电子有限公司 | Wireless communication method, apparatus, and system, and device and storage medium |
| WO2024055852A1 (en) * | 2022-09-16 | 2024-03-21 | 华为技术有限公司 | Data transmission method and apparatus |
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