CN102595449B - A kind of method and system realizing large-bandwidth carrier idle state detection - Google Patents
A kind of method and system realizing large-bandwidth carrier idle state detection Download PDFInfo
- Publication number
- CN102595449B CN102595449B CN201110003038.0A CN201110003038A CN102595449B CN 102595449 B CN102595449 B CN 102595449B CN 201110003038 A CN201110003038 A CN 201110003038A CN 102595449 B CN102595449 B CN 102595449B
- Authority
- CN
- China
- Prior art keywords
- radio frames
- idle
- carrier
- carrier channel
- channel
- 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
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of method and system realizing large-bandwidth carrier idle state detection, all the detection of carrier channel idle condition can be utilized to determine that transmitting station and each receiving station carry out the channel width shared by one or more data-bag interacting and time respectively by transmitting station and multiple receiving station, utilize a transmission opportunity in large bandwidth system fully, ensure that different receiving station carries out the precondition of channel booking in a transmission opportunity respectively with transmitting station, thus the spectrum utilization efficiency under improve large bandwidth system.
Description
Technical field
The present invention relates to the communications field, be specifically related to a kind of method realizing large-bandwidth carrier idle state detection
And system.
Background technology
At present, in field of wireless, WLAN (WLAN) is fast-developing, covers WLAN
Demand growing, the requirement to handling capacity is more and more higher.Institute of Electrical and Electric Engineers industry is advised
In model IEEE802.11 group, successively defining 802.11a, the series of standards such as 802.11b, 802.11g is the most general
Logical WLAN technology, occurs in that other task groups the most successively, is devoted to development and relates to existing 802.11
The specification of technological improvement, such as, 802.11n task groups proposes high-throughput (High throughput, HT)
Requirement, support the data rate of up to 600Mbps, 802.11ac task groups is it is further proposed that VHT (Very
High throughput) concept, by introduce bigger channel width data rate is risen to 1Gbps.
In 802.11, an access point (access point, AP) and website associated plurality of with AP
(Station, STA) constitutes a Basic Service Set (basic service set, BSS).802.11 definition
Two kinds of operator schemes: distributed coordination function (distributed coordination function, DCF) and
Point coordination function (point coordination function, PCF), and changing for both operations pattern
Enter: enhancement mode distributed coordination access function (enhanced distributed channel access, EDCA)
Channel access function (hybrid coordination function controlled is controlled with Hybrid Coordination Function
Channel access, HCCA).Wherein, DCF is most basic operator scheme, utilizes with conflict avoidance
Carrier Sense Multiple Access mechanism CSMA/CA (CSMA with Collision Avoidance) make multiple
Website sharing wireless channel.EDCA is enhanced kind of operation pattern, utilizes CSMA/CA mechanism, makes multiple
Different priorities queue sharing wireless channel, and preengage a transmission opportunity (Transmission Opportunity,
TXOP)。
The radio frames sent in order to avoid different websites produces collision, and website uses physics before sending radio frames
Carrier channel idle condition detection (CCA) technology, detects the signal of physics carrier channel within a period of time
Interference level.When this signal disturbing level is higher than a certain threshold value, i.e. think that carrier channel idle condition is
Busy；Then think that when this signal disturbing level is less than above-mentioned threshold value the carrier channel free time can use.It addition,
Before carrying out the judgement of carrier wave free time, website reduces radio frames further also by the operation of a random back window
The probability of collision.
Prior art allows a transmitting station to continuously transmit radio frames respectively to one or more receiving stations
Time, use a least fixing interFrameGap.But this interFrameGap is normal less than one
The time of CCA testing requirement, it is not enough to carry out before another receiving station sends radio frames in transmitting station
Physical channel detects.Additionally, under the big bandwidth applications environment supporting dynamic bandwidth, different receiving stations by
In the difference of interference environment around, spendable channel width also differs, and therefore transmitting station is to multiple
When receiving station continuously transmits radio frames, how receiving-transmitting sides carries out Channel Detection based on dynamic bandwidth and letter
Road reservation also becomes problem demanding prompt solution.
Summary of the invention
In view of this, offer one is provided and realizes large-bandwidth carrier idle state detection
Method and system, it is ensured that different receiving stations carry out channel in a transmission opportunity respectively with transmitting station
The precondition of reservation, thus the spectrum utilization efficiency under improve large bandwidth system.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
A kind of method realizing large-bandwidth carrier idle state detection, the method includes:
After transmitting station last radio frame transmission between the first receiving station terminates, waiting first
Time interval or the rear of the second time interval send first radio frames to the second receiving station；
In the second time interval before sending radio frames to the second receiving station, described transmitting station carries out sending out
See off a side carrier channel idle condition detection；
Second receiving station is receiving between the second time before first radio frames of described transmitting station
Every interior, it is received the carrier channel idle condition detection of website side, and according to testing result on receiving
In idle carrier channel, the is sent to described transmitting station after stating the interval of the very first time after first radio frames
Two radio frames；
It is wireless that transmitting station calculates data after receiving described second radio frames that the second receiving station sends
The transmission bandwidth of frame, and send data by the bandwidth calculating gained to secondary destination after the first time interval
Radio frames.
When described transmitting station carries out the detection of described carrier channel idle condition, the method farther includes:
The carrier channel that fixed transmitting station and the second receiving station are all supported carries out physical carrier empty
Not busy state-detection, and transmitting station do not uses above-mentioned carrier wave when carrying out Frame switch with the first receiving station
Channel；
It is channel busy, then carrier channel if carried out testing result on the channel of physical carrier channel idle detection
Idle-detection result is busy, is otherwise idle；Meanwhile, transmitting station and the first receiving station carry out Frame switch
Time the carrier wave idle-detection result of carrier channel that uses be considered idle.
The carrier channel carrying out described carrier channel idle-detection comprises transmitting station and the first receiving station transmitting-receiving
The carrier channel used during radio frames, or comprise fixed transmitting station and the second receiving station further
Some or all carrier channels that point is all supported；
Transmitting station carries instruction information in described first radio frames that the second receiving station sends, and uses
In the carrier channel information showing that this radio frames is used, or transmitting station side carries out carrier channel idle-detection
Result is idle carrier channel information.
When described second receiving station carries out the detection of carrier channel idle condition, the method farther includes:
The carrier channel corresponding to carrier channel information indicated in described first radio frames received
On carry out physical carrier idle condition detection and/or receive radio frames；
If carrying out thing in the second time interval that the second receiving station is before receiving above-mentioned first radio frames
The result of reason carrier channel idle condition detection is busy, and not before receiving above-mentioned first radio frames
The second time interval in be successfully received radio frames, then corresponding carrier channel idle condition testing result is busy；
It is otherwise idle.
The described radio frames being successfully received is certain types of radio frames, or any is successfully decoded
Radio frames；
Described second radio frames carries instruction information, for showing the carrier wave letter that this radio frames is used
Road information, or to carry out carrier channel idle-detection result be idle carrier channel information in the second receiving station side.
A kind of system realizing large-bandwidth carrier idle state detection, this system includes transmitting station, first connects
Receive website, the second receiving station；Wherein,
Described transmitting station, after last radio frame transmission between the first receiving station terminates,
Wait the very first time interval or the second time interval rear to second receiving station send first wireless
Frame；And in the second time interval before sending radio frames to the second receiving station, it is transmitted website side
Carrier channel idle condition detection；And receive second receiving station send described second wireless
The transmission bandwidth of data radio frames is calculated after frame, and after the first time interval by calculating the bandwidth of gained to the
Two receive point sends data radio frames；
Described second receiving station, for receiving before first radio frames of described transmitting station
In second time interval, it is received the carrier channel idle condition detection of website side, and according to testing result
To described transmission in idle carrier channel behind very first time interval after receiving above-mentioned first radio frames
Website sends second radio frames.
When described transmitting station carries out the detection of described carrier channel idle condition, it is further used for:
The carrier channel that fixed transmitting station and the second receiving station are all supported carries out physical carrier empty
Not busy state-detection, and transmitting station do not uses above-mentioned carrier wave when carrying out Frame switch with the first receiving station
Channel；
It is channel busy, then carrier channel if carried out testing result on the channel of physical carrier channel idle detection
Idle-detection result is busy, is otherwise idle；Meanwhile, transmitting station and the first receiving station carry out Frame switch
Time the carrier wave idle-detection result of carrier channel that uses be considered idle.
The carrier channel carrying out described carrier channel idle-detection comprises transmitting station and the first receiving station transmitting-receiving
The carrier channel used during radio frames, or comprise fixed transmitting station and the second receiving station further
Some or all carrier channels that point is all supported；
Transmitting station carries instruction information in described first radio frames that the second receiving station sends, and uses
In the carrier channel information showing that this radio frames is used, or transmitting station side carries out carrier channel idle-detection
Result is idle carrier channel information.
When described second receiving station carries out the detection of carrier channel idle condition, it is further used for:
The carrier channel corresponding to carrier channel information indicated in described first radio frames received
On carry out physical carrier idle condition detection and/or receive radio frames；
If carrying out thing in the second time interval that the second receiving station is before receiving above-mentioned first radio frames
The result of reason carrier channel idle condition detection is busy, and not before receiving above-mentioned first radio frames
The second time interval in be successfully received radio frames, then corresponding carrier channel idle condition testing result is busy；
It is otherwise idle.
The described radio frames being successfully received is certain types of radio frames, or any is successfully decoded
Radio frames；
Described second radio frames carries instruction information, for showing the carrier wave letter that this radio frames is used
Road information, or to carry out carrier channel idle-detection result be idle carrier channel information in the second receiving station side.
Visible, the inventive method and system, all can be utilized carrier channel by transmitting station and multiple receiving station
Idle condition detection determines that transmitting station and each receiving station carry out one or more data-bag interacting institute respectively
The channel width taken and time, utilize a transmission opportunity in large bandwidth system fully, it is ensured that no
In a transmission opportunity, carry out the precondition of channel booking respectively with transmitting station with receiving station, thus
Improve the spectrum utilization efficiency under large bandwidth system.
Accompanying drawing explanation
Fig. 1 is the network topology schematic diagram that the present invention realizes under the big bandwidth of multichannel；
Fig. 2 is the data transmission procedure schematic diagram of dynamic bandwidth of the present invention；
Fig. 3 is the big bandwidth for transmission schematic diagram of the embodiment of the present invention one；
Fig. 4 is the big bandwidth for transmission schematic diagram of the embodiment of the present invention two；
Fig. 5 is the big bandwidth for transmission schematic diagram of the embodiment of the present invention four；
Fig. 6 is the big bandwidth for transmission schematic diagram of the embodiment of the present invention five；
Fig. 7 is the general flow chart that the present invention realizes large-bandwidth carrier idle state detection.
Detailed description of the invention
In general, after transmitting station last radio frame transmission between the first receiving station terminates,
Time interval A can be waited, rear to second receiving station send first radio frames.
Described transmitting station can carry out sending out in time interval B before sending described first radio frames
See off a side carrier channel idle condition detection.Described transmitting station carries out carrier channel idle condition detection
Time, physical carrier idle condition detection can be carried out in carrier channel and/or receive radio frames.
Further, when described transmitting station carries out the detection of carrier channel idle condition, can be fixed
Physical carrier idle condition detection is carried out in the carrier channel that transmitting station and the second receiving station are all supported, and
And transmitting station does not use above-mentioned carrier channel when carrying out Frame switch with the first receiving station.If carried out
On the channel of physical carrier channel idle detection, testing result is channel busy, then carrier channel idle-detection result
It is busy, is otherwise idle.Meanwhile, transmitting station and the first receiving station carry out the carrier wave of use during Frame switch
The carrier wave idle-detection result of channel is considered idle.
Further, the carrier channel carrying out carrier channel idle-detection can only comprise transmitting station and first
The carrier channel used during receiving station transmitting/receiving wireless frame, or comprise fixed transmitting station further
The some or all carrier channels all supported with the second receiving station.
Further, transmitting station can be carried in described first radio frames that the second receiving station sends
Instruction information, for showing the carrier channel information that this radio frames is used, or transmitting station side carries out carrier wave
Channel idle testing result is idle carrier channel information.
Between second receiving station time before receiving described first radio frames that transmitting station sends
In B, the carrier channel idle condition detection of website side can be received, and connecing according to testing result
Send out to transmitting station in idle carrier channel after receiving time interval A after above-mentioned first radio frames
Send second radio frames.
Further, when described second receiving station carries out the detection of carrier channel idle condition, can receive
To described first radio frames in carry out physics in carrier channel corresponding to indicated carrier channel information
Carrier idle state detection and/or reception radio frames.
Further, if between second receiving station time before receiving above-mentioned first radio frames
The result carrying out physical carrier channel clear detection in B is busy, and is not receiving above-mentioned the
Be successfully received a radio frames in time interval B before one radio frames, then corresponding carrier channel is empty
Not busy state-detection result is busy；It is otherwise idle.
Further, the above-mentioned radio frames being successfully received can be a certain types of radio frames,
It can also be any radio frames being successfully decoded.
Further, above-mentioned second radio frames can carry instruction information, be used for showing this radio frames institute
The carrier channel information used, or to carry out carrier channel idle-detection result be idle in the second receiving station side
Carrier channel information.
It is wireless that transmitting station calculates data after receiving described second radio frames that the second receiving station sends
The transmission bandwidth of frame, and send data by the bandwidth after calculating to secondary destination after time interval A
Radio frames.
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are illustrated.In embodiments of the present invention, involved
And channel width include 20MHz, 40MHz, 80MHz, 120MHz, 160MHz, and other with
20MHz is the bigger channel width of unit.
Seeing Fig. 1, transmitting station 100 (hereinafter referred to as 100) is that multiple different receiving station carries out many frame numbers
According to transmission, and carry out the detection of carrier channel bandwidth idle condition and idle load respectively based on each receiving station
The determination of ripple channel, mainly includes following operation:
100 and first receiving station 101 (hereinafter referred to as 101) interactive channel reserve requests/response frame, and with
101 carry out one or more Frame and/or the transmission of response frame and reception process, the most one or more
Frame Frame switch sequence.
After completing one or more data frames exchange sequence when 100 and 101, a short interframe can waited
After interval (SIFS) or a point coordinate interFrameGap (PIFS), continue and next receiving station second
Receiving station 102 (hereinafter referred to as 102) interactive channel reserve requests and/or response frame, redefining is 102
Send the carrier channel bandwidth that data are used, and carry out one or more Frame Frame switch sequence with 102
Process.
100 are sending before channel reservation request frames to 102, can a short interFrameGap (SIFS) or
One point carries out carrier channel idle condition detection in coordinating interval (PIFS).100 is empty according to carrier channel
The result of not busy state-detection determines spendable idle carrier channel, and in the channel booking frame mailing to 102
Carry idle carrier channel instruction information.
102 are sending before channel booking response frames to 100, can be before receiving channel reservation request signal
A short interFrameGap (SIFS) or point coordinate interval (PIFS) in carry out the carrier wave letter of 102 sides
Road idle condition detection.102 determine spendable idle load according to the result of carrier channel idle condition detection
Ripple channel, and in the channel booking response frame mailing to 100, carry idle carrier channel instruction information.
100 are receiving after the channel booking response frame of 102, indicated by channel booking response frame
The idle carrier channel of 102 sides, determine the carrier channel bandwidth that subsequent data frame is used, and carry at this
Carry out follow-up Frame and/or the transmission of response frame and reception with 102 on ripple channel.
The rest may be inferred, and 100 can carry out carrier channel idle condition detection with multiple receiving stations, and carry out
Frame frame sequence exchange.
Illustrate the specific implementation method of such scheme further below.
Embodiment one
In Fig. 3, the carrier channel ability of 100 is 160MHz.The carrier channel ability of 101 is 80MHz.
The carrier channel ability of 102 is 80MHz.
The maximum carrier channel ability that the receiving-transmitting sides of 100 and 101 agreements is all supported is 80MHz.100 Hes
The maximum carrier channel ability that the receiving-transmitting sides of 102 agreements is all supported is 80MHz.
100 to the 101 channel reservation request frames sending 80MHz carrier channel, to carry out channel booking.When
After 101 receive and decode channel reservation request frame, reply the channel booking response frame of 40MHz carrier channel.
After 100 receive and decode channel booking response frame, determine when forward direction 101 sends the one of 40MHz carrier channel
Individual or multiple Frames.101 indicate according to the control territory of the Frame received, and can receive data
ACK frame is replied after frame.
100 send last Frame to 101, and require that 101 reply ACK frames confirm.Connecing
Receive 101 to the ACK acknowledgement frame of last Frame after, 100 after SIFS time interval to 102
Send channel reservation request frame.Further, 100 in the PIFS time before 102 transmission channel reservation request frames
In interval, the 40MHz carrier channel not used when sending Frame with 101 carries out CCA.When
When CCA testing result is idle, then 100 side carrier channel idle-detection results are 80MHz carrier channel
Free time, 100 to the 102 channel reservation request frames sending 80MHz carrier channel；When CCA testing result
For busy, then 100 side carrier channel idle-detection results are that 40MHz carrier channel is idle, and 100 to 102
Send the channel reservation request frame of 40MHz carrier channel.
After receiving the channel reservation request frame of 100 when 102, before receiving channel reservation request frame
In PIFS time interval, all carrier channels indicated by channel reservation request frame carry out CCA detection,
In the carrier channel of 80MHz, such as carry out CCA detection.
When the CCA testing result in 80MHz carrier channel is all idle, then 102 side carrier channels are empty
Not busy testing result is that 80MHz carrier channel is idle, 102 SIFS after receiving channel reservation request frame
To the 100 channel booking response frames sending 80MHz carrier channel after time interval.
When CCA testing result is busy, then 102 detect before receiving channel reservation request frame further
In PIFS time interval, whether receive in the carrier channel that CCA is detected as hurrying comprising and be correctly decoded
Radio frames；Without receiving and being correctly decoded radio frames, then corresponding carrier channel idle condition detection knot
Fruit is busy；Otherwise corresponding carrier channel idle condition testing result is idle.102 is idle according to carrier channel
State-detection result sends channel booking response frame.Such as in 40MHz carrier channel idle condition testing result
For free time, then transmission 40MHz channel booking response frame.When all carrier waves indicated by channel reservation request frame
The idle condition testing result of channel is all busy, then 102 do not send channel booking response frame.
100 receive after the channel booking response frame of 102, according to the carrier wave indicated by channel response frame
Channel, determines the carrier channel that the follow-up Frame being sent to 102 uses, and according to the carrier channel determined,
One or more Frames are sent to 102 after receiving the SIFS time interval of channel response frame.102
Indicate according to the control territory of the Frame received, after receiving Frame, reply ACK frame.
Embodiment two
With embodiment one, its difference is:
In Fig. 4,100 send last Frame to 101, and require that 101 reply ACK frames are carried out really
Recognize.But the PIFS time interval that 100 after having sent last Frame is not received by 101
ACK acknowledgement frame to last Frame, then 100 PIFS after having sent last Frame
Channel reservation request frame is sent to 102 after time interval.Further, 100 asking to 102 transmission channel bookings
Believe at the 80MHz carrier wave with the maximum carrier channel ability of 102 agreements in seeking the PIFS time interval before frame
CCA is carried out on road.When CCA testing result is idle, the idle condition of 100 side correspondence carrier channels
Testing result is idle；When CCA testing result is busy, the idle shape health check-up of 100 side correspondence carrier channels
It is busy for surveying result.100, according to carrier channel idle-detection result, send the idle carrier channel of instruction to 102
Channel reservation request frame；The idle shape body testing result of such as 100 side correspondence carrier channels is 80MHz
Carrier channel is idle, and 100 to the 102 channel reservation request frames sending 80MHz carrier channel；100 sides pair
The idle shape body testing result answering carrier channel is that 40MHz carrier channel is idle, and 100 send to 102
The channel reservation request frame of 40MHz carrier channel.If 100 side all carrier channels idle-detection results are all
It is busy, then 100 does not send channel reservation request frame.
Embodiment three
With embodiment one, its difference is:
After receiving the channel reservation request frame of 100 when 102, before receiving channel reservation request frame
In PIFS time interval, all carrier channels indicated by channel reservation request frame carry out CCA detection,
In the carrier channel of 80MHz, such as carry out CCA detection.
When the CCA testing result in 80MHz carrier channel is all idle, then 102 side carrier channels are empty
Not busy testing result is that 80MHz carrier channel is idle, 102 SIFS after receiving channel reservation request frame
To the 100 channel booking response frames sending 80MHz carrier channel after time interval.
When CCA testing result is busy, then 102 detect before receiving channel reservation request frame further
In PIFS time interval, whether receive in the carrier channel that CCA is detected as hurrying comprising and be correctly decoded
ACK frame；Without receiving and be correctly decoded ACK frame, then corresponding carrier channel idle condition detection
Result is busy；Otherwise corresponding carrier channel idle condition testing result is idle.102 is empty according to carrier channel
Not busy state-detection result sends channel booking response frame.Such as at 40MHz carrier channel idle condition detection knot
When fruit is idle, send 40MHz channel booking response frame.When all loads indicated by channel reservation request frame
The idle condition testing result of ripple channel is all busy, and 102 do not send channel booking response frame.
Embodiment four
With embodiment one, its difference is:
In Fig. 5,100 send last Frame to 101, and require that 101 reply ACK frames are carried out really
Recognize.After receiving the 101 ACK acknowledgement frames to last Frame, 100 in PIFS time interval
Channel reservation request frame is sent afterwards to the second receiving station 102.Further, 100 pre-to 102 transmission channels
About in the PIFS time interval before claim frame, the 40MHz not used when sending Frame with 101 carries
CCA is carried out on ripple channel.When CCA testing result is idle, then 100 side carrier channel idle-detection
Result is that 80MHz carrier channel is idle, and 100 please to 102 channel bookings sending 80MHz carrier channel
Seek frame；When CCA testing result is busy, then 100 side carrier channel idle-detection results are that 40MHz carries
Ripple channel idle, 100 to the 102 channel reservation request frames sending 40MHz carrier channel.
Embodiment five
With embodiment one, its difference is:
In Fig. 6, after receiving the channel reservation request frame of 100 when 102, receiving channel reservation request
In SIFS time interval before frame, all carrier channels indicated by channel reservation request frame carry out CCA
Detection, such as, carry out CCA detection in the carrier channel of 80MHz.
Understanding in conjunction with various embodiments above, the present invention realizes the operation thinking of large-bandwidth carrier idle state detection
Can represent flow process as shown in Figure 7, this flow process comprises the following steps:
Step 710: after transmitting station last radio frame transmission between the first receiving station terminates,
Wait the very first time interval or the second time interval rear to second receiving station send first wireless
Frame.
Step 720: in the second time interval before sending radio frames to the second receiving station, described transmission
Website is transmitted the carrier channel idle condition detection of website side.
Step 730: the second receiving station is receiving before first radio frames of described transmitting station
In second time interval, it is received the carrier channel idle condition detection of website side, and according to testing result
To described transmission in idle carrier channel behind very first time interval after receiving above-mentioned first radio frames
Website sends second radio frames.
Step 740: transmitting station is counted after receiving described second radio frames that the second receiving station sends
Count the transmission bandwidth according to radio frames, and receives to second by the bandwidth calculating gained after the first time interval
Point sends data radio frames.
The most visible, either method or system, the present invention realizes large-bandwidth carrier idle state inspection
The technology surveyed, all can be utilized the detection of carrier channel idle condition the most really by transmitting station and multiple receiving station
Determine transmitting station and each receiving station carry out the channel width shared by one or more data-bag interacting and time
Between, utilize a transmission opportunity in large bandwidth system fully, it is ensured that different receiving stations are a biography
Carry out the precondition of channel booking in defeated chance with transmitting station respectively, thus improve under large bandwidth system
Spectrum utilization efficiency.
The above, only presently preferred embodiments of the present invention, it is not intended to limit the protection model of the present invention
Enclose, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, all should
Within being included in protection scope of the present invention.
Claims (10)
1. the method realizing large-bandwidth carrier idle state detection, it is characterised in that the method includes:
After transmitting station last radio frame transmission between the first receiving station terminates, waiting first
Time interval or the rear of the second time interval send first radio frames to the second receiving station；
In the second time interval before sending radio frames to the second receiving station, described transmitting station carries out sending out
See off a side carrier channel idle condition detection；
Second receiving station is receiving between the second time before first radio frames of described transmitting station
Every interior, it is received the carrier channel idle condition detection of website side, and according to testing result on receiving
In idle carrier channel, the is sent to described transmitting station after stating the interval of the very first time after first radio frames
Two radio frames；
It is wireless that transmitting station calculates data after receiving described second radio frames that the second receiving station sends
The transmission bandwidth of frame, and send data by the bandwidth calculating gained to secondary destination after the first time interval
Radio frames.
Method the most according to claim 1, it is characterised in that described transmitting station carries out described carrier wave
During channel clear detection, the method farther includes:
The carrier channel that fixed transmitting station and the second receiving station are all supported carries out physical carrier empty
Not busy state-detection, and transmitting station do not uses above-mentioned carrier wave when carrying out Frame switch with the first receiving station
Channel；
It is channel busy, then carrier channel if carried out testing result on the channel of physical carrier channel idle detection
Idle-detection result is busy, is otherwise idle；Meanwhile, transmitting station and the first receiving station carry out Frame switch
Time the carrier wave idle-detection result of carrier channel that uses be considered idle.
Method the most according to claim 1, it is characterised in that:
The carrier channel carrying out described carrier channel idle-detection comprises transmitting station and the first receiving station transmitting-receiving
The carrier channel used during radio frames, or comprise fixed transmitting station and the second receiving station further
Some or all carrier channels that point is all supported；
Transmitting station carries instruction information in described first radio frames that the second receiving station sends, and uses
In the carrier channel information showing that this radio frames is used, or transmitting station side carries out carrier channel idle-detection
Result is idle carrier channel information.
4. according to the method described in any one of claims 1 to 3, it is characterised in that described second receiving station
When point carries out the detection of carrier channel idle condition, the method farther includes:
The carrier channel corresponding to carrier channel information indicated in described first radio frames received
On carry out physical carrier idle condition detection and/or receive radio frames；
If carrying out thing in the second time interval that the second receiving station is before receiving above-mentioned first radio frames
The result of reason carrier channel idle condition detection is busy, and not before receiving above-mentioned first radio frames
The second time interval in be successfully received radio frames, then corresponding carrier channel idle condition testing result is busy；
It is otherwise idle.
Method the most according to claim 4, it is characterised in that:
The described radio frames being successfully received is certain types of radio frames, or any is successfully decoded
Radio frames；
Described second radio frames carries instruction information, for showing the carrier wave letter that this radio frames is used
Road information, or to carry out carrier channel idle-detection result be idle carrier channel information in the second receiving station side.
6. the system realizing large-bandwidth carrier idle state detection, it is characterised in that this system includes sending out
See off point, the first receiving station, the second receiving station；Wherein,
Described transmitting station, after last radio frame transmission between the first receiving station terminates,
Wait the very first time interval or the second time interval rear to second receiving station send first wireless
Frame；And in the second time interval before sending radio frames to the second receiving station, it is transmitted website side
Carrier channel idle condition detection；And after receiving second radio frames that the second receiving station sends
Calculate the transmission bandwidth of data radio frames, and connect to second by the bandwidth calculating gained after the first time interval
Sink sends data radio frames；
Described second receiving station, for receiving before first radio frames of described transmitting station
In second time interval, it is received the carrier channel idle condition detection of website side, and according to testing result
To described transmission in idle carrier channel behind very first time interval after receiving above-mentioned first radio frames
Website sends second radio frames.
System the most according to claim 6, it is characterised in that described transmitting station carries out described carrier wave
During channel clear detection, it is further used for:
The carrier channel that fixed transmitting station and the second receiving station are all supported carries out physical carrier empty
Not busy state-detection, and transmitting station do not uses above-mentioned carrier wave when carrying out Frame switch with the first receiving station
Channel；
It is channel busy, then carrier channel if carried out testing result on the channel of physical carrier channel idle detection
Idle-detection result is busy, is otherwise idle；Meanwhile, transmitting station and the first receiving station carry out Frame switch
Time the carrier wave idle-detection result of carrier channel that uses be considered idle.
System the most according to claim 6, it is characterised in that:
The carrier channel carrying out described carrier channel idle-detection comprises transmitting station and the first receiving station transmitting-receiving
The carrier channel used during radio frames, or comprise fixed transmitting station and the second receiving station further
Some or all carrier channels that point is all supported；
Transmitting station carries instruction information in described first radio frames that the second receiving station sends, and uses
In the carrier channel information showing that this radio frames is used, or transmitting station side carries out carrier channel idle-detection
Result is idle carrier channel information.
9. according to the system described in any one of claim 6 to 8, it is characterised in that described second receiving station
When point carries out the detection of carrier channel idle condition, it is further used for:
The carrier channel corresponding to carrier channel information indicated in described first radio frames received
On carry out physical carrier idle condition detection and/or receive radio frames；
If carrying out thing in the second time interval that the second receiving station is before receiving above-mentioned first radio frames
The result of reason carrier channel idle condition detection is busy, and not before receiving above-mentioned first radio frames
The second time interval in be successfully received radio frames, then corresponding carrier channel idle condition testing result is busy；
It is otherwise idle.
System the most according to claim 9, it is characterised in that:
The described radio frames being successfully received is certain types of radio frames, or any is successfully decoded
Radio frames；
Described second radio frames carries instruction information, for showing the carrier wave letter that this radio frames is used
Road information, or to carry out carrier channel idle-detection result be idle carrier channel information in the second receiving station side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110003038.0A CN102595449B (en) | 2011-01-07 | 2011-01-07 | A kind of method and system realizing large-bandwidth carrier idle state detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110003038.0A CN102595449B (en) | 2011-01-07 | 2011-01-07 | A kind of method and system realizing large-bandwidth carrier idle state detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102595449A CN102595449A (en) | 2012-07-18 |
| CN102595449B true CN102595449B (en) | 2016-09-28 |
Family
ID=46483552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110003038.0A Active CN102595449B (en) | 2011-01-07 | 2011-01-07 | A kind of method and system realizing large-bandwidth carrier idle state detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102595449B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938936A (en) * | 2012-11-14 | 2013-02-20 | 北京奇天揽胜科技有限公司 | Scheduling device and scheduling method of inter-multiple-radio-frequency-module for wireless local area network (WLAN) system |
| CN103840908B (en) * | 2012-11-22 | 2017-11-21 | 华为终端（东莞）有限公司 | Configured information sending method, data transmission method for uplink and equipment |
| JP6289650B2 (en) * | 2014-02-11 | 2018-03-07 | ホアウェイ・テクノロジーズ・カンパニー・リミテッド | Data transmission method and device |
| CN105337705B (en) * | 2014-08-06 | 2020-06-23 | 中兴通讯股份有限公司 | Data transmission feedback, data transmission method and device |
| CN105636231B (en) | 2014-11-05 | 2019-01-25 | 电信科学技术研究院 | A kind of channel-monitoring method and apparatus |
| CN107005302B (en) * | 2014-12-31 | 2019-05-03 | 华为技术有限公司 | A kind of method of channel access, site apparatus and access point apparatus |
| CN106304199A (en) * | 2015-05-27 | 2017-01-04 | 中兴通讯股份有限公司 | Channel negotiation method, website and system |
| CN111431663B (en) * | 2015-07-16 | 2024-04-26 | 华为技术有限公司 | Data transmission method, device and system carrying indication information |
| WO2017075774A1 (en) * | 2015-11-04 | 2017-05-11 | 华为技术有限公司 | Clear channel assessment method and network node |
| CN107872846B (en) * | 2016-09-28 | 2024-03-19 | 华为技术有限公司 | Data transmission method and device |
| CN111132202B (en) * | 2020-02-28 | 2022-11-04 | 展讯通信（上海）有限公司 | Wireless data transmission method and device, storage medium and STA (station) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1946087A (en) * | 2006-09-30 | 2007-04-11 | 华为技术有限公司 | Data transmission method and system between movable terminal and server end |
| CN101729370A (en) * | 2008-10-31 | 2010-06-09 | 华为技术有限公司 | Method, device and system for adjusting bandwidth occupied by service |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005295499A (en) * | 2004-03-08 | 2005-10-20 | Matsushita Electric Ind Co Ltd | Method of reducing media access overhead in radio network |
-
2011
- 2011-01-07 CN CN201110003038.0A patent/CN102595449B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1946087A (en) * | 2006-09-30 | 2007-04-11 | 华为技术有限公司 | Data transmission method and system between movable terminal and server end |
| CN101729370A (en) * | 2008-10-31 | 2010-06-09 | 华为技术有限公司 | Method, device and system for adjusting bandwidth occupied by service |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102595449A (en) | 2012-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102595449B (en) | A kind of method and system realizing large-bandwidth carrier idle state detection | |
| CN102111201B (en) | Efficient uplink sdma operation | |
| CN102067652B (en) | Apparatus for collision mitigation of multicast transmissions in wireless networks | |
| CN102694633B (en) | Method and system for transmission of dynamic bandwidth data frame | |
| EP3158795B1 (en) | Apparatus and methods for bandwidth efficient operations in wireless local area networks | |
| US9419752B2 (en) | Transmission opportunity operation of uplink multi-user multiple-input-multiple-output communication in wireless networks | |
| US9295074B2 (en) | Acknowledgement, error recovery and backoff operation of uplink multi-user multiple-input-multiple-output communication in wireless networks | |
| KR101422985B1 (en) | Method and apparatus for response scheduling in a downlink multiple-user multiple input multiple output network | |
| US8982819B2 (en) | Method and system for channel data transmission in wireless network | |
| US20170265130A1 (en) | Dynamic broadcast time to wake service period allocation | |
| CN104039013B (en) | Resource allocation information processing method and processing device | |
| EP3975439A1 (en) | Method and system for multi-user transmit opportunity for multi-user multiple-input-multiple-output wireless networks | |
| US20120207074A1 (en) | Transmitting multiple group-addressed frames in a wireless network | |
| US8619786B2 (en) | Facilitating distributed channel access for transmissions in a wireless communication environment | |
| US20160323881A1 (en) | Techniques for using alternate channels for acknowledgement messages | |
| CN103378929B (en) | The method of reseptance and device of radio frames | |
| CN102801506A (en) | Method and system for transmitting channel feedback information | |
| CN105532065A (en) | System and method for OFDMA PS-Poll transmission | |
| EP2945309B1 (en) | Data transmission method, device and system | |
| US20220104243A1 (en) | Multiuser communication method and device in distributed wireless lan | |
| CN102695286A (en) | Method and apparatus for network allocation vector resetting | |
| CN105900513A (en) | Method and apparatus for channel competition | |
| CN102387549B (en) | Channel booking method and system | |
| WO2016127348A1 (en) | Access point (ap), station (sta), communication system and data transmission method | |
| CN102739371B (en) | Channel information collection method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |