CN102761400B - The feedback method and system of a kind of radio channel information in wireless network - Google Patents
The feedback method and system of a kind of radio channel information in wireless network Download PDFInfo
- Publication number
- CN102761400B CN102761400B CN201110111390.6A CN201110111390A CN102761400B CN 102761400 B CN102761400 B CN 102761400B CN 201110111390 A CN201110111390 A CN 201110111390A CN 102761400 B CN102761400 B CN 102761400B
- Authority
- CN
- China
- Prior art keywords
- receiving station
- radio frames
- channel information
- station
- radio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of two schemes of the feedback method of the radio channel information in wireless network, a kind of method includes：Transmitting station sends radio frames to one or more receiving stations, and request receiving station feeds back radio channel information to transmitting station and initiates a transmission opportunity；First receiving station in identification information is successfully received after radio frames, if judging that the channel free time then feeds back radio channel information according to network allocation vector.The invention also discloses a kind of two schemes of the reponse system of the radio channel information in wireless network, first receiving station that a kind of feedback of channel information unit in system is used in identification information is successfully received after radio frames, if judging that the channel free time then feeds back radio channel information according to network allocation vector.Using the method and system of the present invention, efficiently solve above-mentioned the problem of whether have to be solved in feedback procedure for radio channel information.
Description
Technical field
The present invention relates to a kind of feedback method of the radio channel information in wireless communication field, more particularly to wireless network
And system.
Background technology
At present in field of wireless, with WLAN (WLAN) fast development, the demand covered to WLAN
Also it is growing therewith, requirement to handling capacity also more and more higher.Institute of Electrical and Electric Engineers industrial specification
In IEEE802.11 groups, 802.11a is successively defined, 802.11b, the most common WLAN technologies of series of standards such as 802.11g,
Other task groups are then occurred in that successively again, are directed to developing the specification for being related to existing 802.11 technological improvement, for example,
802.11n task groups propose the requirement of high-throughput (HT, High throughput), support to be up to 600Mbps data speed
Rate, 802.11ac task groups are it is further proposed that the concept of higher throughput (VHT, Very High throughput), by drawing
Enter bigger channel width and 1Gbps is arrived into data rate lifting.New agreement needs the agreement before backward compatibility.
In 802.11 technologies, an access point (AP, Access Point) and multiple websites associated with AP (STA,
Station a Basic Service Set (BSS, Basic Service Set)) is constituted.Two kinds of behaviour defined in 802.11 technologies
Operation mode：Distributed coordination function (DCF, Distributed Coordination Function) and point coordination function (PCF,
Point Coordination Function), and for the improvement of both operator schemes：Enhanced distributed coordination is visited
Ask that function (EDCA, enhanced distributed channel access) and Hybrid Coordination Function control channel access work(
Energy (HCCA, hybrid coordination function controlled channel access).
Wherein, DCF is most basic operator scheme, utilizes the Carrier Sense Multiple Access mechanism with conflict avoidance
(CSMA or for CA, CSMA with Collision Avoidance) makes multiple website sharing wireless channels.EDCA is enhancing
Type operator scheme, using CSMA/CA mechanism, makes multiple different priorities queue sharing wireless channels, and preengage a conveyer
Meeting (TXOP, Transmission Opportunity).
During multiple wireless site shared channels, the collision detection of wireless environment becomes extremely difficult, wherein once big problem
It is to hide website.Hide website example as shown in figure 1, website A to B send data, while website C also to B send data, due to
Website C and website A each other all in the coverage of other side outside, website A and website C send data to B simultaneously will cause punching
It is prominent.From the perspective of slave site A, website C is a hiding website.To solve to hide station problem, 802.11 technologies are proposed
Pseudo channel testing mechanism, be：Domain (the Duration of reserve channel time information is included in radio frames frame head
Field), other websites of auditing for receiving the radio frames containing the reserve channel time information, set one be locally stored
Network allocation vector (NAV, Network Allocation Vector), if being believed according to the reservation for the radio frames being currently received
The NAV being locally stored of road time information renovation will be greater than the NAV ' before updating, then update NAV.Within the time, website is audited
Active data will not be sent, so that concealed nodes competitive channel is avoided, the conflict caused.Website is audited until local NAV subtracts
It is that could send data after zero.The example of NAV setting or renewal is as shown in Fig. 2 the RTS in Fig. 2 is Request to Send
Abbreviation, represent request send；CTS is Clear to Send abbreviation, and expression allows to send.
Current 802.11ac technologies define new Frame switch sequence to carry out channel information collection, are specially：Send
Website or send empty packet statement frame (NDPA, Null a Data for wireless channel measurement requesting party (beamformer)
Packet Announcement) ask receiving station or feed back wireless channel for information measurement report side (beamformee)
Metrical information, and short interFrameGap (SIFS) after NDPA terminates sends empty packet (NDP, Null Data afterwards
Packet).The identification information (STA Info) of one or more receiving stations is included in NDPA, indicating needs to feed back wireless communication
The identification information of the receiving station of road metrical information.The first receiving station indicated in the identification information finish receiving NDPA and
NDP short interFrameGap (SIFS) gives tacit consent to reply radio channel information (VHT Compressed Beamforming afterwards
Frame), if multiple receiving stations, in addition to first receiving station acquiescence feedback, other receiving stations wait transmitting station
Poll (Sounding Poll) feed back radio channel information.Frame switch sequence such as Fig. 3 institutes that radio channel information is collected
Show, STA1, STA2 in Fig. 3 represent multiple receiving stations.
If only including the identification information of a receiving station, the reception address of the NDPA in the identification information in NDPA
(RA) it is the MAC Address of the website.If including the identification information of multiple websites in identification information, the reception address of the NDPA
(RA) it is the MAC Address of broadcast type.In the prior art, it is all to hear NDPA's when it is broadcast type address to receive address
Receiving station and audit website and updated in the case where meeting certain condition or current NAV is set, be：If utilizing current reception
To NDPA in reserve channel time information (Duration) update the NAV that is locally stored and will be greater than current NAV when, then it is full
Sufficient NAV is set or update condition.
At present, the problem of having to be solved in the prior art be：When competing a transmission opportunity, if transmitting station sends one
Whether first receiving station that individual broadcast type is received in the NDPA of address, identification information needs the Duration according to NDPA
To set or update its NAV, whether the receiving station needs to judge channel clear according to its NAV to decide whether to feed back nothing
Line channel information.It is above-mentioned to be directed to nothing in view of there is a situation where that OBSS scenes disturb (disturbed condition between the overlapping BSS in region)
If the problem of whether line channel information has to be solved in feedback procedure can not effectively be solved, it will OBSS scenes are produced
Raw interference and the defect for bringing being unfair property of transmission opportunity competition.
The content of the invention
In view of this, it is a primary object of the present invention to provide a kind of feedback side of the radio channel information in wireless network
Method and system, efficiently solve it is above-mentioned the problem of whether have to be solved in feedback procedure for radio channel information, so as to
Avoid the defect that interference is produced to OBSS scenes and brings transmission opportunity to compete being unfair property.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of feedback method of radio channel information in wireless network, this method includes：
Transmitting station sends radio frames to one or more receiving stations, and request receiving station feeds back to the transmitting station
Radio channel information simultaneously initiates a transmission opportunity；The identification information of one or more receiving stations is included in the radio frames；
First receiving station in the identification information is successfully received after the radio frames, according to network allocation vector
Judge whether channel is idle, radio channel information is fed back if idle.
Wherein, the reception address of the radio frames is specially：The address of unicast type or the address of broadcast type.
Wherein, when receiving the address that address is broadcast type of the radio frames, this method also includes：Current receiving station
The identification information in the radio frames is checked, if identification information indicates that current receiving station is first receiving station, currently
Receiving station keeps oneself current network allocation vector constant.
Wherein, this method also includes：First receiving station that identification information in the radio frames is indicated is properly received
To after the radio frames, if judging that channel is the free time according to current network allocation vector, first receiving station exists
Radio channel information is fed back behind awaiting a specified time interval to the transmitting station.
Wherein, in the case where the transmitting station is by sending one transmission opportunity of the radio frames initiation, this method
Also include：If the transmitting station is successfully received the nothing of first receiving station feedback in the radio frames identification information
After line channel information, then a transmission opportunity is obtained.
A kind of feedback method of radio channel information in wireless network, this method includes：
Obtain transmission opportunity and transmission have built up in the case of, transmitting station is sent out to one or more receiving stations
Radio frames are sent, request receiving station feeds back radio channel information to the transmitting station；One or many is included in the radio frames
The identification information of individual receiving station；
If the current network allocation vector of first receiving station in the identification information is by the transmitting station
Set, then first receiving station is successfully received after the radio frames that the transmitting station is sent, no matter channel
It is whether idle, radio channel information is fed back behind awaiting a specified time interval to the transmitting station.
A kind of reponse system of radio channel information in wireless network, the system includes：Radio frames transmitting element and letter
Road information feedback unit；Wherein,
The radio frames transmitting element, sends radio frames, request connects for transmitting station to one or more receiving stations
Website is received to feed back radio channel information to the transmitting station and initiate a transmission opportunity；In the radio frames comprising one or
The identification information of multiple receiving stations；
The feedback of channel information unit, is successfully received described for first receiving station in the identification information
After radio frames, judge whether channel is idle according to network allocation vector, radio channel information is fed back if idle.
Wherein, the system also includes：Network allocation vector unit, the ground that address is broadcast type is received for radio frames
In the case of location, current receiving station checks the identification information in the radio frames, if identification information indicates current receiving station
For first receiving station, then current receiving station keeps oneself current network allocation vector constant.
Wherein, the feedback of channel information unit, the first of the identification information instruction being further used in the radio frames
Individual receiving station is successfully received after the radio frames, if judging that channel is the free time according to current network allocation vector,
Then first receiving station feeds back radio channel information to the transmitting station behind awaiting a specified time interval.
A kind of reponse system of radio channel information in wireless network, the system includes：Radio frames transmitting element and letter
Road information feedback unit；Wherein,
The radio frames transmitting element, for obtain transmission opportunity and transmission have built up in the case of, dispatching station
Point sends radio frames to one or more receiving stations, and request receiving station feeds back radio channel information to the transmitting station；
The identification information of one or more receiving stations is included in the radio frames；
The feedback of channel information unit, the current network point for first receiving station in the identification information
It is by the case that the transmitting station is set, first receiving station is successfully received transmitting station hair with vector
After the radio frames sent, no matter whether channel is idle, and radio channel information is fed back behind awaiting a specified time interval to institute
State transmitting station.
The method of an aspect of the invention is：Transmitting station sends radio frames to one or more receiving stations, and request connects
Website is received to feed back radio channel information to transmitting station and initiate a transmission opportunity；Received in radio frames comprising one or more
The identification information of website.First receiving station in identification information is successfully received after radio frames, according to network allocation vector
Judge whether channel is idle, radio channel information is fed back if idle.The method of another scheme of the present invention is：Passed
Defeated chance and transmission have built up in the case of, transmitting station to one or more receiving stations send radio frames, request receive
Website feeds back radio channel information to transmitting station；The identification information of one or more receiving stations is included in radio frames.If
The current network allocation vector of first receiving station in identification information is set by transmitting station, then first receiving station
Point is successfully received after the radio frames of transmitting station transmission, and no matter whether channel is idle, anti-behind awaiting a specified time interval
Radio channel information is presented to transmitting station.Using the present invention, the problem of having to be solved in the prior art is realized, is efficiently solved
It is above-mentioned the problem of whether have to be solved in feedback procedure for radio channel information.
Brief description of the drawings
Fig. 1 is hiding website schematic diagram in the prior art；
Fig. 2 updates schematic diagram for network allocation vector in the prior art；
Fig. 3 is radio channel information feedback frame turnaround sequence schematic diagram in the prior art；
Fig. 4 is the feedback of the information schematic diagram of the embodiment of the present invention one；
Fig. 5 is the feedback of the information schematic diagram of the embodiment of the present invention two；
The feedback of the information schematic diagram of Fig. 6 embodiment of the present invention three；
Fig. 7 is the feedback of the information schematic diagram of the embodiment of the present invention four；
Fig. 8 is the feedback of the information schematic diagram of the embodiment of the present invention five.
Embodiment
The present invention basic thought be：For the method for one of which scheme, transmitting station connects to one or more
Receive website and send radio frames, request receiving station feeds back radio channel information to transmitting station and initiates a transmission opportunity；Nothing
The identification information of one or more receiving stations is included in line frame.First receiving station in identification information is successfully received nothing
After line frame, judge whether channel is idle according to network allocation vector, radio channel information is fed back if idle.It need to be noted that
Be：The program be judged according to network allocation vector channel whether the free time come decide whether feed back radio channel information.
For the method for another scheme, obtain transmission opportunity and transmission have built up in the case of, send
Website sends radio frames to one or more receiving stations, and request receiving station feeds back radio channel information to transmitting station；Nothing
The identification information of one or more receiving stations is included in line frame.If the current net of first receiving station in identification information
Network allocation vector is set by transmitting station, then first receiving station is successfully received the radio frames of transmitting station transmission
Afterwards, no matter whether channel is idle, and radio channel information is fed back behind awaiting a specified time interval to transmitting station.Need exist for
It is pointed out that：The program is need not to judge the whether idle just feedback radio channel information of channel.
A kind of feedback method of radio channel information in wireless network, includes two schemes, one of which scheme master
To include herein below：
Transmitting station sends a radio frames to one or more receiving stations and initiates a transmission opportunity.It is wherein described
Radio frames indicate that the receiving station feeds back radio channel information to the transmitting station.The radio frames are comprising one or more
The identification information of receiving station.First receiving station in the identification information is successfully received after the radio frames, according to
Network allocation vector judges whether channel is idle, and radio channel information is fed back if idle.
Further, the reception address of the radio frames can be the address of unicast or broadcast type.
Further, when receiving the address that address is broadcast type of the radio frames, the receiving station checks described
The identification information of radio frames, if identification information is first receiving station, keeps the network allocation vector that oneself is current.
Further, first receiving station that the radio frames are indicated is successfully received after the radio frames, is checked and is worked as
Preceding network allocation vector, if it indicates that channel is the free time, the receiving station is waiting specific time interval (such as
SIFS radio channel information) is fed back afterwards.
Further, in the case of the transmitting station initiates a transmission opportunity, the transmitting station is successfully received
After the radio channel information of first receiving station, that is, obtain a transmission opportunity.
Highlighted above is all transmission and the feedback of the information of the radio frames (such as NDPA) when how to obtain a transmission opportunity,
Described below transmitted it has been established that the situation that radio frames (such as NDPA) send and fed back in a transmission opportunity.
A kind of feedback method of radio channel information in wireless network, another scheme mainly includes herein below：
Obtain transmission opportunity and transmission have built up in the case of, transmitting station is sent out to one or more receiving stations
Send a radio frames.Wherein, radio frames indicate that receiving station feeds back radio channel information to transmitting station.One is included in radio frames
The identification information of individual or multiple receiving stations.The current network allocation vector of first receiving station in the identification information is
When set by the transmitting station, first receiving station is successfully received the radio frames that the transmitting station is sent
Afterwards, no matter whether channel is idle, and radio channel information is fed back afterwards waiting specific time interval (such as SIFS).
In summary, the solution of the present invention is to realize the problem of having to be solved in the prior art, specify that NDPA conducts
When the first frame of one transmission opportunity of acquisition is transmitted or NDPA is transmitted in a transmission opportunity, how to carry out wireless
How the feedback of channel information, more reasonably set or update the network allocation vector of receiving station, and is sweared by network allocation
Amount judges channel clear to decide whether to carry out radio channel information feedback, to ensure that valid wireless channel information is anti-
Present and avoid the interference to OBSS scenes as far as possible.
Citing elaboration is carried out to the present invention below.
Realize that radio channel information feedback mainly includes in the present invention：
Transmitting station sends radio frames NDPA to one or more receiving stations and initiates a transmission opportunity, indicates described
Receiving station feeds back radio channel information to the transmitting station, and after the specific interframe space (such as SIFS) that NDPA terminates
Send NDP.
The identification information of receiving station can be included in above-mentioned NDPA, the mark letter of one or more receiving stations is indicated
Breath.First receiving station indicated in NDPA is successfully received after NDPA and NDP, keeps oneself current network allocation to swear
Measure NAV constant, and judge whether channel is idle according to NAV currency, if NAV is equal to zero, represent channel idle, then in NDP
Specific interframe space (such as SIFS) after end feeds back radio channel information afterwards, does not otherwise feed back.
Transmitting station initiates a transmission opportunity using above-mentioned radio frames, and is successfully received first receiving station
Feedback after, that is, obtain a transmission opportunity.
Realize that radio channel information feedback also includes in the present invention：
Transmitting station has been obtained for a transmission opportunity, and is sent out in the transmission opportunity to one or more receiving stations
Send radio frames NDPA.First receiving station indicated in NDPA is successfully received after NDPA and NDP, judges its current net
Whether network allocation vector NAV is as set by the transmitting station, if it is, no matter current NAV indicates whether channel is idle,
Specific interframe space (such as SIFS) after NDP terminates feeds back radio channel information afterwards.
The implementation to technical scheme is described in further detail below in conjunction with the accompanying drawings.
Embodiment one：
Transmitting station AP1 to multiple receiving station transmission control frame NDPA by initiating a transmission opportunity, and request is received
Website feeds back radio channel information.Receiving station address in the mac frame head (MAC Header) for the NDPA control frames that AP1 is sent
RA is that station recognition information (STA info) indicates STA1, STA2, STA3 in broadcast address, mac frame load (payload),
STA4 mark.Wherein STA1 is first receiving station.AP1 is sent after NDPA, and STA1 is successfully received after NDPA, is judged certainly
Oneself is first receiving station in STA info identification informations, then without NAV setting.AP1 is sent after NDPA at one
The follow-up superventions of short frame frame period SIFS send NDP control frames.STA1 judges that its current NAV is not as set by AP1 and according to certainly
Oneself current NAV value judges whether channel is idle, if NAV values are the zero one short frame interframe space i.e. after NDP is received
Radio channel information is fed back after SIFS.Otherwise, without feedback.AP1 initiates a transmission opportunity using above-mentioned radio frames NDPA,
And have successfully received after the radio channel information of STA1 feedbacks, that is, obtain a transmission opportunity.
Other feedback of channel information side STA2 in STA info lists, STA3, STA4 receive broadcast address RA's
After NDPA, judge whether to meet NAV setting or update condition, that is, the NAV after updating is big by the value than current NAV.If full
This condition of foot, then update its NAV, and wait follow-up souding poll control frames to be received.STA2, STA3, STA4 are received
After broadcast address RA NDPA can also without NAV renewal.When STA2 receive issue the sounding poll of oneself it
Afterwards, STA2 is after frame interframe space SIFS one short is waited, and no matter whether channel is idle, carries out feedback of channel information.Follow-up
STA3, STA4 operation are by that analogy.The feedback of the information of the present embodiment is as shown in Figure 4.
Embodiment two：
Transmitting station AP1 to a receiving station transmission control frame NDPA by initiating a transmission opportunity, and request is received
Website feeds back radio channel information.Receiving station address in the mac frame head (MACHeader) for the NDPA control frames that AP1 is sent
RA is unicast address, and identical with STA1 MAC Address.Station recognition information (STA info) in mac frame load (payload)
Indicate STA1 mark.It is also unique feedback of channel information side that wherein STA1, which is first,.AP1 is sent after NDPA, STA1
Be successfully received NDPA, judge that the MAC Address of oneself is identical with NDPA RA, and its current NAV be not as set by AP1,
Its NAV is not updated then.AP1 send NDP control frames after sending NDPA in the follow-up superventions of frame frame period SIFS one short, and STA1 judges it
Current NAV is not to judge whether channel is idle as set by AP1, and according to oneself current NAV value, if NAV values are zero i.e.
Fed back after the frame interframe space SIFS one short after receiving NDP.Otherwise, without feedback.AP1 uses above-mentioned wireless
Frame NDPA initiates a transmission opportunity, and has successfully received after the channel information of STA1 feedbacks, that is, obtains a transmission opportunity.This
The feedback of the information of embodiment is as shown in Figure 5.
Embodiment three：
Transmitting station AP1 is asked in a transmission opportunity acquired to multiple receiving station transmission control frame NDPA
Receiving station feeds back radio channel information.Receiving station in the mac frame head (MAC Header) for the NDPA control frames that AP1 is sent
Address RA is broadcast address, and station recognition information (STA info) indicates STA1, STA2 in mac frame load (payload),
STA3, STA4 mark.Wherein STA1 is first receiving station.AP1 is sent after NDPA, and STA1 is successfully received NDPA, sentences
Its disconnected current NAV is set by AP1, that is, thinks the owner that AP1 is current transmission chance.STA1 judges oneself for STA
First receiving station in info identification informations, then without NAV setting or renewal.AP1 sends short at one after NDPA
The follow-up superventions of frame frame period SIFS send NDP control frames.STA1 is successfully received after NDP, and no matter whether its NAV indicates present channel
Free time, radio channel information is fed back after frame interframe space SIFS one short.The feedback of the information of the present embodiment is as shown in Figure 6.
Example IV：
Transmitting station AP1 is asked in a transmission opportunity acquired to multiple receiving station transmission control frame NDPA
Receiving station feeds back radio channel information.Receiving station in the mac frame head (MAC Header) for the NDPA control frames that AP1 is sent
Address RA is broadcast address, and station recognition information (STA info) indicates STA1, STA2 in mac frame load (payload),
STA3, STA4 mark.Wherein STA1 is first receiving station.AP1 is sent after NDPA, and STA1 is successfully received after NDPA,
Judging its current NAV is set by the transmitting station, that is, thinks the owner that AP1 is current transmission chance.STA1 judges
Oneself is first receiving station in STA info identification informations, then according to NAV setting or update condition, after even updating
NAV the value than current NAV is then updated into greatly its NAV.AP1 is sent after NDPA, is continued after frame frame period SIFS one short
Send NDP control frames.STA1 is had successfully received after NDP, and no matter its NAV indicates whether present channel is idle, in one short frame interframe
Radio channel information is fed back after the SIFS of interval.
Other receiving station STA2 in STA info identification informations, STA3, STA4 receive broadcast address RA NDPA
Afterwards, judge whether to meet NAV setting or update condition, that is, the NAV after updating is big by the value than current NAV.If meeting this
Condition, then update its NAV, and wait follow-up souding poll control frames to be received.STA2, STA3, STA4 receive broadcast
After address RA NDPA can also without NAV renewal.After STA2 receives the sounding poll for issuing oneself,
STA2 feeds back radio channel information after frame interframe space SIFS one short is waited.Follow-up STA3, STA4 operation are with such
Push away.The feedback of the information of the present embodiment is as shown in Figure 7.
Embodiment five：
Transmitting station AP1 is asked in a transmission opportunity acquired to a receiving station transmission control frame NDPA
Receiving station feeds back radio channel information.Receiving station in the mac frame head (MAC Header) for the NDPA control frames that AP1 is sent
Address RA is unicast address, and station recognition information (STA info) indicates STA1 mark in mac frame load (payload).
Wherein STA1 is first and is unique receiving station.AP1 is sent after NDPA, and STA1 is successfully received NDPA, judges that it is worked as
Preceding NAV is set by the transmitting station, that is, thinks the owner that AP1 is current transmission chance.Due to NDPA RA addresses
It is identical with STA1 MAC Address, therefore STA1 is without NAV setting or renewal.AP1 is sent after NDPA, in one short frame frame
The interval follow-up superventions of SIFS send NDP control frames.STA1 is successfully received after NDP, and no matter its NAV indicates whether present channel is empty
In the spare time, radio channel information is fed back after frame interframe space SIFS one short.The feedback of the information of the present embodiment is as shown in Figure 8.
Embodiment six：
Transmitting station AP1 by initiating a transmission opportunity to receiving station transmission control frame Sounding Poll,
Ask receiving station STA1 feedback radio channel informations.It is to be herein pointed out the present embodiment is a spy of identification information
Example, Sounding Poll reception address is STA1 identification information.STA1 is successfully received after Sounding Poll not
NAV setting is carried out, and judges that oneself current NAV is not as set by AP1, then to judge to believe according to oneself current NAV value
Whether road is idle, if NAV values are zero, i.e., feed back radio channel information after frame interframe space SIFS one short.Otherwise, without
Feedback.AP1 initiates a transmission opportunity using above-mentioned radio frames Sounding Poll, and has successfully received the wireless of STA1 feedbacks
After channel information, that is, obtain a transmission opportunity.
A kind of reponse system of radio channel information in wireless network, includes two schemes, one of which scheme master
To include herein below：
The system includes：Radio frames transmitting element and feedback of channel information unit.Wherein, radio frames transmitting element is used to send out
See off and a little send radio frames to one or more receiving stations, request receiving station is believed to transmitting station feedback wireless channel
Cease and initiate a transmission opportunity；The identification information of one or more receiving stations is included in the radio frames.Channel information is anti-
First receiving station that feedback unit is used in the identification information is successfully received after the radio frames, is sweared according to network allocation
Amount judges whether channel is idle, and radio channel information is fed back if idle.
Here, the system also includes：Network allocation vector unit, network allocation vector unit is with being used for the reception of radio frames
In the case of address of the location for broadcast type, current receiving station checks the identification information in the radio frames, if identification information
It is first receiving station to indicate current receiving station, then current receiving station keeps oneself current network allocation vector not
Become.
Here, first reception that the identification information that feedback of channel information unit is further used in the radio frames is indicated
Website is successfully received after the radio frames, if judging that channel is free time, first according to current network allocation vector
Individual receiving station feeds back radio channel information to the transmitting station behind awaiting a specified time interval.
A kind of reponse system of radio channel information in wireless network, another scheme mainly includes herein below：
The system includes：Radio frames transmitting element and feedback of channel information unit.Wherein, radio frames transmitting element, is used for
In the case where obtaining transmission opportunity and transmission having built up, transmitting station sends wireless to one or more receiving stations
Frame, request receiving station feeds back radio channel information to the transmitting station；Received in the radio frames comprising one or more
The identification information of website.Feedback of channel information unit is worked as first receiving station in the radio frames identification information
Preceding network allocation vector be by the transmitting station set in the case of, first receiving station is successfully received the hair
See off after a radio frames sent, no matter whether channel is idle, and wireless channel is fed back behind awaiting a specified time interval
Information gives the transmitting station.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (7)
1. the feedback method of the radio channel information in a kind of wireless network, it is characterised in that this method includes：
Transmitting station sends radio frames to one or more receiving stations, and request receiving station feeds back wireless to the transmitting station
Channel information simultaneously initiates a transmission opportunity；The identification information of one or more receiving stations is included in the radio frames；
First receiving station in the identification information is successfully received after the radio frames, is judged according to network allocation vector
Whether channel is idle, and radio channel information is fed back if idle；Wherein, the reception address of the radio frames is specially unicast type
Address or broadcast type address；
When the radio frames are when receiving the address that address is broadcast type, current receiving station checks the knowledge in the radio frames
Other information, if identification information indicates that current receiving station is first receiving station, current receiving station keeps oneself current
Network allocation vector it is constant.
2. according to the method described in claim 1, it is characterised in that this method also includes：
Current receiving station checks the identification information in the radio frames, if current receiving station is one indicated in identification information
Individual receiving station, then current receiving station keep oneself current network allocation vector constant.
3. according to the method described in claim 1, it is characterised in that this method also includes：Identification information in the radio frames
First receiving station indicated is successfully received after the radio frames, if judging letter according to current network allocation vector
Road is the free time, then first receiving station feeds back radio channel information to the dispatching station behind awaiting a specified time interval
Point.
4. according to the method described in claim 1, it is characterised in that initiated in the transmitting station by sending the radio frames
In the case of one transmission opportunity, this method also includes：If the transmitting station is successfully received the radio frames identification letter
After the radio channel information of first receiving station feedback in breath, then a transmission opportunity is obtained.
5. the reponse system of the radio channel information in a kind of wireless network, it is characterised in that the system includes：Radio frames are sent
Unit, feedback of channel information unit and network allocation vector unit；Wherein,
The radio frames transmitting element, sends radio frames to one or more receiving stations for transmitting station, asks receiving station
Point feeds back radio channel information to the transmitting station and initiates a transmission opportunity；Comprising one or more in the radio frames
The identification information of receiving station；
The feedback of channel information unit, is successfully received described wireless for first receiving station in the identification information
After frame, judge whether channel is idle according to network allocation vector, radio channel information is fed back if idle；Wherein, it is described wireless
The reception address of frame is specially the address or the address of broadcast type of unicast type；
In the case of network allocation vector unit, address of the reception address for broadcast type for radio frames, current receiving station
Point checks the identification information in the radio frames, if identification information indicates that current receiving station is first receiving station, when
Preceding receiving station keeps oneself current network allocation vector constant.
6. system according to claim 5, it is characterised in that network point allocation vector unit, is additionally operable to：
Current receiving station checks the identification information in the radio frames, if current receiving station is one indicated in identification information
Individual receiving station, then current receiving station keep oneself current network allocation vector constant.
7. system according to claim 5, it is characterised in that the feedback of channel information unit, is further used for described
First receiving station that identification information in radio frames is indicated is successfully received after the radio frames, if according to current net
Network allocation vector judges that channel is the free time, then first receiving station feeds back wireless channel behind awaiting a specified time interval
Information gives the transmitting station.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710418723.7A CN107181571B (en) | 2011-04-29 | 2011-04-29 | Feedback method and system of wireless channel information in wireless network |
| CN201110111390.6A CN102761400B (en) | 2011-04-29 | 2011-04-29 | The feedback method and system of a kind of radio channel information in wireless network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110111390.6A CN102761400B (en) | 2011-04-29 | 2011-04-29 | The feedback method and system of a kind of radio channel information in wireless network |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710418723.7A Division CN107181571B (en) | 2011-04-29 | 2011-04-29 | Feedback method and system of wireless channel information in wireless network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102761400A CN102761400A (en) | 2012-10-31 |
| CN102761400B true CN102761400B (en) | 2017-10-31 |
Family
ID=47055728
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710418723.7A Active CN107181571B (en) | 2011-04-29 | 2011-04-29 | Feedback method and system of wireless channel information in wireless network |
| CN201110111390.6A Active CN102761400B (en) | 2011-04-29 | 2011-04-29 | The feedback method and system of a kind of radio channel information in wireless network |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710418723.7A Active CN107181571B (en) | 2011-04-29 | 2011-04-29 | Feedback method and system of wireless channel information in wireless network |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN107181571B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3107345B1 (en) * | 2014-03-05 | 2019-10-30 | Huawei Device Co., Ltd. | Channel resource indication method and device |
| WO2016032276A2 (en) * | 2014-08-29 | 2016-03-03 | 주식회사 윌러스표준기술연구소 | Wireless communication method and wireless communication terminal |
| WO2016082118A1 (en) | 2014-11-26 | 2016-06-02 | 华为技术有限公司 | Wireless communication method, equipment and system |
| CN106550478B (en) * | 2015-09-22 | 2020-08-04 | 中兴通讯股份有限公司 | Method and device for setting multi-user transmission network distribution vector |
| CN107172714B (en) * | 2016-03-08 | 2022-07-15 | 中兴通讯股份有限公司 | Network allocation vector NAV processing method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453260A (en) * | 2007-11-29 | 2009-06-10 | 上海寰创通信科技有限公司 | Radio channel management method for wireless Locale Area Network equipment |
| CN101873294A (en) * | 2010-06-08 | 2010-10-27 | 北京新岸线无线技术有限公司 | Method for obtaining sub-information channel modulation code and data transmission method for wireless local area network |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006050519A (en) * | 2003-10-24 | 2006-02-16 | Sony Corp | Wireless communications system, wireless communications apparatus, wireless communication method, and computer program |
| US9048895B2 (en) * | 2009-06-05 | 2015-06-02 | Broadcom Corporation | Multi-user null data packet (MU-NDP) sounding within multiple user, multiple access, and/or MIMO wireless |
| US8665767B2 (en) * | 2009-08-25 | 2014-03-04 | Qualcomm Incorporated | Method and apparatus for multiple-user communication in a client initiated communication transmission scheme |
| US20110222473A1 (en) * | 2009-09-18 | 2011-09-15 | Qualcomm Incorporated | Protocol to support adaptive station-dependent channel state information feedback rate in multi-user communication systems |
| CN102006630B (en) * | 2010-11-10 | 2013-08-07 | 北京航空航天大学 | Multichannel cooperative data transmission method and system |
-
2011
- 2011-04-29 CN CN201710418723.7A patent/CN107181571B/en active Active
- 2011-04-29 CN CN201110111390.6A patent/CN102761400B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453260A (en) * | 2007-11-29 | 2009-06-10 | 上海寰创通信科技有限公司 | Radio channel management method for wireless Locale Area Network equipment |
| CN101873294A (en) * | 2010-06-08 | 2010-10-27 | 北京新岸线无线技术有限公司 | Method for obtaining sub-information channel modulation code and data transmission method for wireless local area network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102761400A (en) | 2012-10-31 |
| CN107181571B (en) | 2020-05-19 |
| CN107181571A (en) | 2017-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11451269B2 (en) | Method and system for multi-user transmit opportunity for multi-user multiple-input-multiple-output wireless networks | |
| US11245501B2 (en) | Multi-access point scheduling in wireless local area networks | |
| CN102067652B (en) | Apparatus for collision mitigation of multicast transmissions in wireless networks | |
| KR102134457B1 (en) | The method and system for uplink multi-user multiple-input-multiple-output communication in wireless networks | |
| CN103718600B (en) | For the signaling and process design of the honeycomb cluster competed on licensed band is exempted from | |
| US20140269544A1 (en) | Transmission opportunity operation of uplink multi-user multiple-input-multiple-output communication in wireless networks | |
| CN103037531B (en) | A kind of method and system of wireless site access channel | |
| CN102882660B (en) | Transmission method and system of channel feedback information | |
| CN102695286B (en) | Network allocation vector repositioning method and device | |
| CN103428885B (en) | A kind of contention access method and website | |
| CN104904292A (en) | A method and apparatus for medium access control for uniform multiple access points coverage in wireless local area networks | |
| CN103378929B (en) | The method of reseptance and device of radio frames | |
| CN102761400B (en) | The feedback method and system of a kind of radio channel information in wireless network | |
| CN103202082A (en) | Facilitating distributed channel access for transmissions in a wireless communication environment | |
| CN108141769A (en) | Base station apparatus, wireless terminal device and wireless communications method | |
| US9231747B2 (en) | Method and apparatus for transmitting wireless frame, and communication network element | |
| JP2011217234A (en) | Radio communication system | |
| WO2020225473A1 (en) | Shared transmission opportunity | |
| WO2020144392A1 (en) | Cooperative beamforming in wireless network | |
| WO2024091742A1 (en) | Coordinated spatial reuse (c-sr) framework for ultra-high reliability (uhr) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |