CN102694633B - Method and system for transmission of dynamic bandwidth data frame - Google Patents
Method and system for transmission of dynamic bandwidth data frame Download PDFInfo
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- CN102694633B CN102694633B CN201110067997.9A CN201110067997A CN102694633B CN 102694633 B CN102694633 B CN 102694633B CN 201110067997 A CN201110067997 A CN 201110067997A CN 102694633 B CN102694633 B CN 102694633B
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Abstract
The invention discloses a method and system for transmission of dynamic bandwidth data frame. The method comprises that a transmitting site sends a channel reservation request supporting dynamic bandwidth to a receiving site; the transmitting site receives a dynamic bandwidth channel reservation confirmation from the receiving site; within transmission duration indicated by the dynamic bandwidth channel reservation conformation, the transmitting site adopts transmitting bandwidth information which is not more than that indicated by the dynamic bandwidth channel reservation confirmation, to transmit data wireless frames with the receiving site, and continues to transmit the data wireless frames when exceeding the transmitting duration indicated by the dynamic bandwidth channel reservation confirmation. The method and the system of the invention can reduce cost and enhance data transmitting efficiency in dynamic bandwidth.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of transmission of dynamic bandwidth data frame and system.
Background technology
At present, in field of wireless, WLAN (WLAN) is fast-developing, and the demand that WLAN is covered is required increasingly
Increase, the also more and more higher of the requirement to handling capacity.In Institute of Electrical and Electric Engineers industrial specification IEEE802.11 groups, successively
The most common WLAN technologies of the series of standards such as 802.11a, 802.11b, 802.11g are defined, subsequently which is occurred in that successively again
His task groups, are devoted to developing the specification for being related to existing 802.11 technological improvement, and for example, 802.11n task groups propose that height is handled up
The requirement of amount (High throughput, abbreviation HT), supports to be up to the data rate of 600Mbps, and 802.11ac task groups enter one
Step proposes the concept of VHT (Very High throughput), arrives data rate lifting by introducing bigger channel width
1Gbps.Also, with the evolution of 802.11 agreements, the channel width of traditional 20MHz have been expanded to 40MHz, 80MHz,
120MHz, or even 160MHz, these big bandwidth are bound by several 20MHz and are formed.Wherein 40MHz is by continuous 20MHz
Constitute with 20MHz, 80MHz is made up of continuous 40MHz and 40MHz, 160MHz by continuous or discontinuous 80MHz and
80MHz is constituted.Under 40MHz bandwidth, one of 20MHz is referred to as main channel, and other 20MHz channels are referred to as auxiliary channel.80MHz bands
Under width, one of 20MHz is referred to as main channel, and the 40MHz containing main channel is referred to as main 40M channels, and other 40MHz channels are referred to as
Auxiliary channel, by that analogy.
In 802.11, an access point (Access Point, abbreviation AP) and with the associated plurality of websites of AP
(STAtion, abbreviation STA) constitutes a Basic Service Set (Basic Service Set, abbreviation BSS).802.11 define
Two kinds of operator schemes：Distributed coordination function (Distributed Coordination Function, abbreviation DCF) and point association
Conditioning function (Point Coordination Function, abbreviation PCF), and for the improvement of both operations pattern：Strengthen
Type distributed coordination access function (Enhanced Distributed Channel Access, abbreviation EDCA) and mixing are coordinated
Function control channel access function (Hybrid Coordination function Controlled channel Access,
Abbreviation HCCA).Wherein, DCF is most basic operator scheme, using the Carrier Sense Multiple Access mechanism with conflict avoidance
CSMA/CA (CSMA with Collision Avoidance) makes multiple website sharing wireless channels.EDCA is enhanced kind of operation
Pattern, using CSMA/CA mechanism, makes multiple different priorities queue sharing wireless channels, and preengages a transmission opportunity
(Transmission Opportunity, abbreviation TXOP).One transmission opportunity of reservation is subscribed to one section of transmission duration (TXOP
Duration).Each priority query with qos requirement has a transmission time threshold value TXOP limit parameter respectively,
Duration for limiting the maximum of the TXOP obtained by the priority query is limited.
During multiple wireless site shared channels, the collision detection of wireless environment becomes extremely difficult, wherein once big problem
It is to hide website.
Fig. 1 is the schematic diagram of the hiding website according to correlation technique, as shown in figure 1, website A sends data to B, while station
Point C also sends data to B, and outside A and C coverage each other all in other side, A and C sends simultaneously and will lead to a conflict.
From from the perspective of A, C is a hiding website.For solving to hide station problem, 802.11 propose pseudo channel testing machine
System, i.e., by including reserve channel time information in radio frames frame head, other are received containing the wireless of time reservation information
Frame audit website arrange a locally stored network allocation vector (Network Allocation Vector, referred to as
NAV), the value of NAV is set to the maximum of above-mentioned time reservation information, within the time, audits website and will not send data,
So as to avoid concealed nodes competitive channel, collision is caused, after NAV is kept to zero, other websites could send data.Tie below
Close Fig. 2 to be described in detail.
Fig. 2 is the schematic diagram of the RTS/CTS according to correlation technique, as shown in Fig. 2 transmitting station sends RTS (Request
To send) frame carries out channel booking, wherein comprising the first channel booking temporal information, receiving station response CTS (Clear to
Send) frame carries out channel booking confirmation, wherein comprising second channel reservation time information, to ensure that transmitting station can complete frame
Exchange.Wherein, the channel booking deadline indicated by the first channel booking temporal information and second channel reservation time information
Indicated channel booking is deadline identical.
Meanwhile, under big bandwidth channel, due to the BSS that the overlap around transmitting station and receiving station is covered
The situation of (Overlapping BSS, abbreviation OBSS) is different, and its respective bandwidth of operation is therefore also different, it is possible to use
RTS/CTS mechanism supports the negotiation of the dynamic bandwidth of receiving-transmitting sides.For example, transmitting station sends RTS frames and carries out channel booking, its
In include the transmission bandwidth information of the first channel booking temporal information and request, one section frame of the receiving station before RTS transmissions
Between interval (PCF interFrameGaps, PCF InterFrame Space, abbreviation PIFS) in, RTS indicate transmission bandwidth in carry out
Channel idle is detected, and sends CTS response frames on corresponding idle channel according to testing result, carries out channel booking confirmation,
The transmission bandwidth information of second channel reservation time information and response is included wherein in CTS frames, and transmitting station is receiving CTS
Afterwards, the bandwidth for being indicated according to CTS determines the transmission bandwidth of data radio frames, and is subsequently counted in the transmission duration preengage
According to the transmission of radio frames, so as to ensure that transmitting station and receiving station can complete Frame switch in suitable bandwidth, it is to avoid
With the interference between other OBSS.
For the Frame switch process under above-mentioned dynamic bandwidth, after RTS/CTS agreed bandwidths, transmitting station subsequently sends
The bandwidth that used of Frame it is consistent with the bandwidth that receiving station is indicated.But, the bandwidth that receiving station is indicated relatively may be sent out
See off and to send the bandwidth asked during RTS and reduce, this results in data transmission time increases (if packet is not segmented again).
For example, a width of 40MHz of band that a width of 80MHz of band that RTS is indicated, CTS are indicated, the then band that subsequent data frame clearing house uses are a width of
40MHz, this is resulted under same MCS, and data transmission rate halves, and data transmission time extends one times.
Furthermore, it is contemplated that the transmission of Frame has transmission time threshold in correlation technique, therefore during above-mentioned data is activation
Between increase may cause beyond the time threshold, and then affect bandwidth resources reasonable efficient utilization.
The content of the invention
The channel that second channel reservation time information is indicated can be exceeded for increasing for data transmission time in correlation technique
Subscription time proposes the present invention so as to affect the problem of the reasonable efficient utilization of bandwidth resources, for this purpose, the main mesh of the present invention
Be that a kind of transmission of dynamic bandwidth data frame and system are provided, to solve the above problems.
To achieve these goals, according to an aspect of the invention, there is provided a kind of dynamic bandwidth data frame transfer side
Method.
Transmission of dynamic bandwidth data frame of the invention includes：Transmitting station sends to receiving station and supports dynamic
The channel reservation request of bandwidth；Transmitting station receives the dynamic bandwidth channel booking confirmation from receiving station；Transmitting station
In dynamic bandwidth channel booking confirms the transmission duration for indicating, confirm that what is indicated sends out using no more than dynamic bandwidth channel booking
Bandwidth information is sent, the transmission with the data radio frames of receiving station is initiated, and is being confirmed to indicate more than dynamic bandwidth channel booking
Transmission duration after, continue data radio frames transmission.
Further, transmitting station continues number after the transmission duration for indicating is confirmed more than dynamic bandwidth channel booking
Include one below according to the transmission of radio frames：Transmitting station is confirming the transmission duration for indicating simultaneously more than dynamic bandwidth channel booking
And in the case of the transmission time threshold value not less than transmission opportunity, the transmission of continuation data radio frames, wherein, the biography of transmission opportunity
Defeated time threshold is the maximum transmission time related to the quality of service of data radio frames；Transmitting station is more than transmission opportunity
In the case of transmission time threshold value, continue the transmission of data radio frames, wherein, the transmission time threshold value of transmission opportunity is and data
The related maximum transmission time of the quality of service of radio frames, the transmission time threshold value of transmission opportunity are more than or equal to dynamic bandwidth channel
Reservation confirms the transmission duration for indicating.
Further, before and after transmitting station carries out dynamic bandwidth channel booking to receiving station, data radio frames
Load length keeps constant.
Further, before the transmission that transmitting station initiates with the data radio frames of receiving station, method also includes：Make
Transmission bandwidth information is used, and channel booking is re-started to receiving station.
Further, transmitting station re-starts channel booking to receiving station includes one below：Transmitting station sends
Channel booking notifies radio frames；Transmitting station carries out channel booking wireless frame exchange with receiving station.
Further, the transmission of data radio frames includes at least one of：Transmitting station send data radio frames, send out
See off a radio frames being associated with data radio frames for sending, the response frame of the data radio frames of receiving station transmission, reception
The response frame of the radio frames being associated with data radio frames that website sends.
Further, data radio frames are the data radio frames for retransmitting.
To achieve these goals, according to another aspect of the present invention, there is provided a kind of dynamic bandwidth data frame transfer
System.
Dynamic bandwidth data frame transfer system of the invention includes transmitting station and receiving station, wherein transmitting station
Including：Sending module, for sending the channel reservation request for supporting dynamic bandwidth to receiving station；Receiver module, for receiving
Dynamic bandwidth channel booking from receiving station confirms；Transport module, for confirming what is indicated in dynamic bandwidth channel booking
In transmission duration, the transmission bandwidth information for confirming to indicate using no more than dynamic bandwidth channel booking is initiated and receiving station
The transmission of data radio frames, and after the transmission duration for indicating being confirmed more than dynamic bandwidth channel booking, continue data wireless
The transmission of frame.
Further, transport module includes：First transmission submodule, for confirming to refer to more than dynamic bandwidth channel booking
In the case of the transmission duration for showing and the transmission time threshold value not less than transmission opportunity, continue the transmission of data radio frames, its
In, the transmission time threshold value of transmission opportunity is the maximum transmission time related to the quality of service of data radio frames；Second transmission
Submodule, for, in the case of the transmission time threshold value more than transmission opportunity, continuing the transmission of data radio frames, wherein, passes
The transmission time threshold value of defeated chance is the maximum transmission time related to the quality of service of data radio frames, the transmission of transmission opportunity
The transmission duration that time threshold confirms to indicate more than dynamic bandwidth channel booking.
Further, before and after transmitting station carries out dynamic bandwidth channel booking to receiving station, data radio frames
Load length keeps constant.
By the present invention, after the transmission duration for indicating being confirmed more than dynamic bandwidth channel booking, proceed dynamic
The transmission of band data frame, such that it is able to reduce expense, improves the data transmission efficiency under dynamic bandwidth.
Description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of the hiding website according to correlation technique；
Fig. 2 is the schematic diagram of the RTS/CTS according to correlation technique；
Fig. 3 is the flow chart of transmission of dynamic bandwidth data frame according to embodiments of the present invention；
Fig. 4 is the schematic diagram of the transmission of dynamic bandwidth data frame according to the preferred embodiment of the present invention one；
Fig. 5 is the schematic diagram of the transmission of dynamic bandwidth data frame according to the preferred embodiment of the present invention two；
Fig. 6 is the schematic diagram of the transmission of dynamic bandwidth data frame according to the preferred embodiment of the present invention three；
Fig. 7 is the schematic diagram of the transmission of dynamic bandwidth data frame according to the preferred embodiment of the present invention five；
Fig. 8 is the schematic diagram of the transmission of dynamic bandwidth data frame according to the preferred embodiment of the present invention six；
Fig. 9 is the structured flowchart of dynamic bandwidth data frame transfer system according to embodiments of the present invention.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combine.Below with reference to the accompanying drawings and in conjunction with the embodiments describing the present invention in detail.
The invention provides a kind of transmission of dynamic bandwidth data frame.Fig. 3 is dynamic band according to embodiments of the present invention
The flow chart of wide data frame transmission method, as shown in figure 3, including steps S302 to step S306.
Step S302, transmitting station send the channel reservation request for supporting dynamic bandwidth to receiving station.
Step S304, transmitting station receive the dynamic bandwidth channel booking confirmation from receiving station.
Step S306, during transmitting station confirms the transmission duration for indicating in dynamic bandwidth channel booking, using no more than dynamic
The reservation of state bandwidth channel confirms the transmission bandwidth information for indicating, initiates the transmission with the data radio frames of receiving station, and super
After crossing the transmission duration that dynamic bandwidth channel booking confirms instruction, continue the transmission of data radio frames.
In correlation technique, increasing for data transmission time can exceed the transmission duration that dynamic bandwidth channel booking confirms instruction,
If thus abandon transmit or again data are carried out be segmented restructuring process if affect bandwidth resources reasonable efficient utilization.This
In bright embodiment, after the transmission duration for indicating being confirmed more than the dynamic bandwidth channel booking, proceed dynamic bandwidth number
According to the transmission of frame, such that it is able to reduce expense, the data transmission efficiency under dynamic bandwidth is improved.
Preferably, transmitting station continues data after the transmission duration for indicating is confirmed more than dynamic bandwidth channel booking
The transmission of radio frames includes one below：Transmitting station more than dynamic bandwidth channel booking confirm indicate transmission duration and
In the case of transmission time threshold value not less than transmission opportunity, continue the transmission of data radio frames, wherein, the transmission of transmission opportunity
Time threshold is the maximum transmission time related to the quality of service of data radio frames；Transmitting station is in the biography more than transmission opportunity
In the case of defeated time threshold, continue the transmission of data radio frames, wherein, the transmission time threshold value of transmission opportunity be with data without
The related maximum transmission time of the quality of service of line frame, the transmission time threshold value of transmission opportunity are pre- more than or equal to dynamic bandwidth channel
About confirm the transmission duration for indicating.
Preferably, before and after transmitting station carries out dynamic bandwidth channel booking to receiving station, data radio frames it is negative
Lotus length keeps constant.
Preferably, before the transmission that transmitting station initiates with the data radio frames of receiving station, method also includes：Use
Transmission bandwidth information, re-starts channel booking to receiving station.
Preferably, transmitting station re-starts channel booking to receiving station includes one below：Transmitting station sends letter
Road request notice radio frames；Transmitting station carries out channel booking wireless frame exchange with receiving station.
Preferably, the transmission of data radio frames includes at least one of：The data radio frames of transmitting station transmission, transmission
The response frame of the data radio frames that the radio frames being associated with data radio frames of website transmission, receiving station are sent, receiving station
The response frame of the radio frames being associated with data radio frames that point sends.
Preferably, data radio frames are the data radio frames for retransmitting.
Process is described in detail to be realized to the embodiment of the present invention below in conjunction with example.
Preferred embodiment one
Fig. 4 is the schematic diagram of the transmission of dynamic bandwidth data frame according to the preferred embodiment of the present invention one.
Under big bandwidth channel, due to transmitting station it is different with the OBSS situations around receiving station, its respective operation
Bandwidth is therefore also different, and when transmission opportunity TXOP is obtained, transmitting station and receiving station can utilize RTS/CTS
Mechanism carries out the negotiation of dynamic bandwidth.PIFS interval of the transmitting station before transmission RTS carries out channel idle detection, judges to work as
Front available bandwidth is 80MHz, i.e., sending RTS in 80MHz bandwidth carries out channel booking.Transmitting station is according to data pending
And possible response time span and appropriate interFrameGap calculate channel booking temporal information Duration, and carry and exist
On RTS frames, while also carrying transmission bandwidth information CH_BANDWIDTH of request, i.e. 80MHz.Receiving station is indicated in RTS
In transmission bandwidth 80MHz, whether detection channel is the free time in the PIFS before RTS transmissions is spaced.In this example, receiving station is at which
In the 40MHz comprising main channel on be detected as the free time, then on the 40MHz send CTS response frames, carry out channel booking true
Recognize, wherein in CTS frames, also include transmission bandwidth information CH_BANDWIDTH of channel booking temporal information and response, dispatching station
Point carries out follow-up data transfer according to bandwidth 40MHz that CTS is indicated after CTS is received.
Data of the outgoing data of transmitting station for Video Stream type, the corresponding maximum transmitted of business of the type in this example
Time limit TXOP Limit be 3.008ms, therefore currently obtained send opportunity it is maximum when be limited to 3.008ms.Transmitting station
The time preengage when RTS is sent is 2.5ms, sends duration, first after bandwidth negotiation Frame data comprising CTS
The transmission duration of frame1, data validation frame Ack1, the transmission duration of second Frame data frame2, data validation frame
ACK2, and necessary interFrameGap.Recipient reply CTS, its channel booking time for 2.5ms deduct CTS send duration with
And a short interFrameGap (SIFS).After transmission bandwidth is reduced to 40MHz by 80MHz, if keeping the frame length of data pending
Degree, then data frame1 and 2 corresponding transmission durations of data frame double.The transmission of data frame1 in this example
Cause the biography of the first data transfer (the necessary interFrameGaps of data frame1+ACK+) after bandwidth negotiation after duration increase
Defeated duration will exceed predetermined maximum transmitted time limit TXOP limit, as the beginning delivery time of data frame1 is in letter
In road reservation duration, therefore transmitting station sends data frame1 after the completion of dynamic bandwidth channel booking RTS/CTS, and complete
Into the first data transfer, that is, complete the transmission of data frame1 and the reception of ACK1.Due to first time DTD
Time beyond channel booking duration and has exceeded TXOP limit, and the send opportunity is in first time DTD
After terminate.
Preferred embodiment two
Fig. 5 is the schematic diagram of the transmission of dynamic bandwidth data frame according to the preferred embodiment of the present invention two.
With preferred embodiment one, when transmitting station continues to send data, i.e. data after the completion of bandwidth negotiation RTS/CTS
The transmission of frame1, does not receive ACK1 after specified time interval is waited and confirms response, then sending data frame1's
PIFS retransmits data frame1 behind interval, as the beginning delivery time of the data frame1 for retransmitting is in channel booking duration
It is interior, therefore transmitting station retransmits data frame1, and complete this Frame and transmit again, that is, complete the weight of data frame1
New transmission and the reception of new ACK acknowledgement frames.As this Frame again transmission end time is beyond letter
Road is preengage duration and has exceeded TXOP limit, and the send opportunity terminates after this again end of transmission.If retransmitting data
Frame1, does not receive new ACK acknowledgement frames yet, then this transmission opportunity terminates.
Preferred embodiment three
Fig. 6 is the schematic diagram of the transmission of dynamic bandwidth data frame according to the preferred embodiment of the present invention three.
With preferred embodiment one, as the beginning delivery time of data frame1 is, in channel booking duration, therefore to work as
Transmitting station continues to send data, the i.e. transmission of data frame1 after the completion of bandwidth negotiation RTS/CTS, when waiting specific
Between be spaced after do not receive ACK1 and confirm response, this time bust thiss.Due to this transmission beyond channel booking duration and
Exceed TXOP limit, then terminated this transmission, and re-start normal backoff procedure, and obtain next send opportunity
After retransmitted.
Preferred embodiment four
With preferred embodiment one, when transmitting station continues to send after the completion of bandwidth negotiation RTS/CTS data, dispatching station
Point determines radio frames transmission bandwidth, and judges data frame1 under this transmission bandwidth, and ACK1 and corresponding interFrameGap are sent out
Send whether duration can exceed RTS/CTS channel booking times or maximum transmission duration restricted T XOP limit, channel is pre- in this example
The duration of first radio frame transmission (data frame1, ACK1 and corresponding interFrameGap) after about is more than TXOP
Limit, then transmitting station according to following principle calculate data frame1 frame heads in duration parameters Duration, i.e.,
The Duration times are equal under the radio frames transmission bandwidth for determining between the ACK1 acknowledgement frames of data frame1 and corresponding interframe
Every transmission duration.I.e.：
D=TSINGLE-MSDU-TPPDU
Wherein TSINGLE-MSDU is to send data frame1, the biography required for ACK1 under the current available bandwidth estimated
Defeated duration and corresponding necessary interFrameGap；Transmission durations of the TPPDU for needed for sending current data frame1.
Preferred embodiment five
Fig. 7 is the schematic diagram of the transmission of dynamic bandwidth data frame according to the preferred embodiment of the present invention five.
With preferred embodiment one, in this example, after the transmission duration increase of data frame1, cause first after bandwidth negotiation
The transmission duration of data transfer (the necessary interFrameGaps of data frame1+ACK+) will exceed preengage channel duration
But send in time limit TXOP limit maximum.Due to the beginning delivery time of data frame1 be in channel booking duration,
Therefore transmitting station sends data frame1 after the completion of dynamic bandwidth channel booking RTS/CTS, and completes the first secondary data biography
It is defeated, that is, complete the transmission of data frame1 and the reception of ACK1.Due to DTD time first time beyond
Channel booking duration, the send opportunity terminate after first time DTD.
Preferred embodiment six
Fig. 8 is the schematic diagram of the transmission of dynamic bandwidth data frame according to the preferred embodiment of the present invention six.
The dynamic bandwidth of this preferred embodiment obtains the process of chance with preferred embodiment one after consulting.
Data of the outgoing data of transmitting station for Video Stream type in this preferred embodiment, the business of the type are corresponding
Maximum transmitted time limit TXOP Limit be 3.008ms, therefore currently obtained send opportunity it is maximum when be limited to 3.008ms.
The time preengage when RTS is sent by transmitting station is 1.5ms, sends duration, first after bandwidth negotiation data comprising CTS
The transmission duration of frame data frame1, data validation frame Ack1, and necessary interFrameGap.When transmission bandwidth is dropped by 80MHz
It is low for 40MHz after, if not changing the frame length of data pending, data frame1 transmit duration accordingly and double.This
The first data transfer after the transmission duration of data frame1 increases in example is (between the necessary interframe of data frame1+ACK+
Every) transmission duration still in predetermined maximum transmitted time limit TXOP limit, transmitting station is completed in bandwidth negotiation RTS/CTS
Afterwards, transmitting station determines radio frames transmission bandwidth, and the transmission bandwidth weight according to determined by according to the bandwidth information after negotiation
It (can be short interFrameGap SIFS or PCF interFrameGaps that channel booking, i.e. transmitting station are newly carried out after an interFrameGap
PIFS), this example is being preengage successfully for being fixed the RTS/CTS channel bookings of (static state) bandwidth 40MHz after SIFS interFrameGaps
Afterwards, transmitting station continues to send data, completes this data frame transfer, that is, complete transmission and the ACK1 of data frame1
Receive.
It should be noted that can be in such as one group of computer executable instructions the step of the flow process of accompanying drawing is illustrated
Perform in computer system, and, although show logical order in flow charts, but in some cases, can be with not
The order being same as herein performs shown or described step.
A kind of dynamic bandwidth data frame transfer system is embodiments provided, the dynamic bandwidth data frame transfer system
Can be used for realizing above-mentioned transmission of dynamic bandwidth data frame.Fig. 9 is dynamic bandwidth Frame according to embodiments of the present invention
The structured flowchart of Transmission system, as shown in figure 9, including transmitting station 91 and receiving station 92, wherein transmitting station 91 includes sending out
Module 911, receiver module 912, transport module 913 is sent, below its structure is described in detail.
Sending module 911, for sending the channel reservation request for supporting dynamic bandwidth to receiving station；Receiver module 912,
Sending module 911 is connected to, the dynamic bandwidth channel booking for receiving from receiving station confirms；Transport module 913, connection
To receiver module 912, for confirming, in the transmission duration for indicating, to make in the dynamic bandwidth channel booking that receiver module 912 is received
The transmission bandwidth information for confirming to indicate with the dynamic bandwidth channel booking that no more than receiver module 912 is received, initiates and receiving station
The transmission of the data radio frames of point 92, and the biography for confirming to indicate in the dynamic bandwidth channel booking received more than receiver module 912
After defeated duration, continue the transmission of data radio frames.
Preferably, transport module 913 includes the first transmission submodule 9131 and the second transmission submodule 9132.Below to which
Structure is described in detail.
First transmission submodule 9131, for confirming the transmission duration and not for indicating more than dynamic bandwidth channel booking
In the case of transmission time threshold value more than transmission opportunity, continue the transmission of data radio frames, wherein, during the transmission of transmission opportunity
Between threshold value be the maximum transmission time related to the quality of service of data radio frames；Second transmission submodule 9132, for super
In the case of crossing the transmission time threshold value of transmission opportunity, continue the transmission of data radio frames, wherein, the transmission time of transmission opportunity
Threshold value is the maximum transmission time related to the quality of service of data radio frames, and the transmission time threshold value of transmission opportunity is more than dynamic
Bandwidth channel reservation confirms the transmission duration for indicating.
Preferably, before and after transmitting station 91 carries out dynamic bandwidth channel booking to receiving station 92, data radio frames
Load length keep it is constant.
It should be noted that the dynamic bandwidth data frame transfer system described in device embodiment corresponds to above-mentioned method
Embodiment, its concrete implementation process had carried out detailed description in embodiment of the method, will not be described here.
In sum, according to the abovementioned embodiments of the present invention, there is provided a kind of transmission of dynamic bandwidth data frame and be
System.By the present invention, after the transmission duration for indicating being confirmed more than dynamic bandwidth channel booking, proceed dynamic bandwidth number
According to the transmission of frame, such that it is able to reduce expense, the data transmission efficiency under dynamic bandwidth is improved.
Obviously, those skilled in the art should be understood that each module or each step of the above-mentioned present invention can be with general
Computing device realizing, they can be concentrated on single computing device, or are distributed in multiple computing devices and are constituted
Network on, alternatively, they can be realized with the executable program code of computing device, it is thus possible to they are stored
In the storage device by computing device performing, or they are fabricated to each integrated circuit modules respectively, or by they
In multiple modules or step be fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific
Hardware and software is combined.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (8)
1. a kind of transmission of dynamic bandwidth data frame, it is characterised in that include：
Transmitting station sends the channel reservation request for supporting dynamic bandwidth to receiving station；
The transmitting station receives the dynamic bandwidth channel booking confirmation from the receiving station；
During the transmitting station confirms the transmission duration for indicating in the dynamic bandwidth channel booking, using no more than described dynamic
Bandwidth channel reservation confirms the transmission bandwidth information for indicating, initiates and the transmission of the data radio frames of the receiving station, and
After the transmission duration for indicating being confirmed more than the dynamic bandwidth channel booking, continue the transmission of the data radio frames；
Wherein, the transmitting station continues institute after the transmission duration for indicating is confirmed more than the dynamic bandwidth channel booking
The transmission for stating data radio frames includes one below：
The transmitting station is confirming the transmission duration for indicating and not less than the biography more than the dynamic bandwidth channel booking
In the case of the transmission time threshold value of defeated chance, continue the transmission of the data radio frames, wherein, the transmission of the transmission opportunity
Time threshold is the maximum transmission time related to the quality of service of the data radio frames；
The transmitting station continues the data radio frames in the case of the transmission time threshold value more than the transmission opportunity
Transmission, wherein, the transmission time threshold value of the transmission opportunity is the maximum biography related to the quality of service of the data radio frames
The defeated time, when the transmission time threshold value of the transmission opportunity confirms the transmission for indicating more than or equal to the dynamic bandwidth channel booking
It is long.
2. method according to claim 1, it is characterised in that enter Mobile state to the receiving station in the transmitting station
Before and after bandwidth channel reservation, the load length of the data radio frames keeps constant.
3. method according to any one of claim 1 to 2, it is characterised in that the transmitting station initiate with it is described
Before the transmission of the data radio frames of receiving station, methods described also includes：Using the transmission bandwidth information, to the reception
Website re-starts channel booking.
4. method according to claim 3, it is characterised in that the transmitting station re-starts letter to the receiving station
Road reservation includes one below：
The transmitting station sends channel booking and notifies radio frames；
The transmitting station carries out channel booking wireless frame exchange with the receiving station.
5. method according to any one of claim 1 to 2, it is characterised in that the transmission of the data radio frames includes
At least one of：Data radio frames that the transmitting station sends, the transmitting station are sending with the data radio frames
The response frame of the data radio frames that associated radio frames, the receiving station send, the receiving station send with
The response frame of the associated radio frames of the data radio frames.
6. method according to any one of claim 1 to 2, it is characterised in that the data radio frames are the numbers for retransmitting
According to radio frames.
7. a kind of dynamic bandwidth data frame transfer system, it is characterised in that including transmitting station and receiving station, wherein described
See off：
Sending module, for sending the channel reservation request for supporting dynamic bandwidth to receiving station；
Receiver module, the dynamic bandwidth channel booking for receiving from the receiving station confirm；
Transport module, for confirming in the transmission duration for indicating in the dynamic bandwidth channel booking, using no more than described dynamic
The reservation of state bandwidth channel confirms the transmission bandwidth information for indicating, initiates the transmission with the data radio frames of the receiving station, and
After the transmission duration for indicating being confirmed more than the dynamic bandwidth channel booking, continue the transmission of the data radio frames；
Wherein, the transport module includes：
First transmission submodule, for more than the dynamic bandwidth channel booking confirm indicate transmission duration and not less than
In the case of the transmission time threshold value of the transmission opportunity, continue the transmission of the data radio frames, wherein, the transmission opportunity
Transmission time threshold value be the maximum transmission time related to the quality of service of the data radio frames；
Second transmission submodule, for, in the case of the transmission time threshold value more than the transmission opportunity, continuing the data
The transmission of radio frames, wherein, the transmission time threshold value of the transmission opportunity is related to the quality of service of the data radio frames
Maximum transmission time, the transmission time threshold value of the transmission opportunity is more than the biography that the dynamic bandwidth channel booking confirms to indicate
Defeated duration.
8. system according to claim 7, it is characterised in that enter Mobile state to the receiving station in the transmitting station
Before and after bandwidth channel reservation, the load length of the data radio frames keeps constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| US9775171B2 (en) | 2013-12-18 | 2017-09-26 | Futurewei Technologies, Inc. | System and method for speed frame exchange |
| WO2015131358A1 (en) * | 2014-03-05 | 2015-09-11 | 华为终端有限公司 | Channel resource indication method and device |
| CN104158645B (en) * | 2014-08-28 | 2017-08-25 | 上海交通大学 | A kind of media access control method based on full duplex access point in WLAN |
| CN106304199A (en) * | 2015-05-27 | 2017-01-04 | 中兴通讯股份有限公司 | Channel negotiation method, website and system |
| CN106535353B (en) * | 2015-09-10 | 2020-02-14 | 华为技术有限公司 | Random back-off method and device |
| US10375731B2 (en) * | 2015-10-28 | 2019-08-06 | Qualcomm Incorporated | Dynamic forbiddance of wireless transmissions by overlapping basic service sets |
| CN107645788A (en) * | 2016-07-22 | 2018-01-30 | 中兴通讯股份有限公司 | A kind of method and device of spatial multiplexing transmission |
| CN109743769B (en) * | 2018-12-29 | 2021-08-24 | 深圳Tcl新技术有限公司 | Self-adaptive control method for RTS/CTS mechanism of communication terminal and related equipment |
| CN111132368B (en) * | 2019-12-23 | 2022-08-09 | 展讯通信（上海）有限公司 | Wireless data transmission method and device, storage medium and terminal |
| CN113840335A (en) * | 2020-06-08 | 2021-12-24 | 展讯通信（上海）有限公司 | Data transmission method and device |
| CN114466226B (en) * | 2022-01-28 | 2023-12-08 | 杭州灵伴科技有限公司 | Bandwidth duration duty cycle determination method, device, equipment and computer readable medium |
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| CN101366241A (en) * | 2006-01-04 | 2009-02-11 | 美商内数位科技公司 | Methods and systems for providing efficient operation of multiple modes in a wlan system |
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