CN103095364B - Data transferring method and device - Google Patents
Data transferring method and device Download PDFInfo
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- CN103095364B CN103095364B CN201110339327.8A CN201110339327A CN103095364B CN 103095364 B CN103095364 B CN 103095364B CN 201110339327 A CN201110339327 A CN 201110339327A CN 103095364 B CN103095364 B CN 103095364B
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1221—Wireless traffic scheduling based on age of data to be sent
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Abstract
The embodiment of the invention discloses a kind of data transferring method and data link.Described method comprises: the first data link sends the first transmission frame to the second data link, comprise in the first data link to be transmitted to the data cached information of the second data link in described first transmission frame, it is the mandate that the first data link is initiated according to described data cached information that first data link obtains the second data link having a transmission opportunity, and the first data link utilizes described mandate to be data cachedly transferred to the second data link by described.
Description
Technical field
The present invention relates to communication technical field.In particular to a kind of data transferring method and device.
Background technology
Basic Service Set (BasicServiceSet, BSS) is the element of WLAN (wireless local area network) (WirelessLocalAreaNetwork, WLAN).To be within a certain particular coverage and the website (Station, STA) with certain association forms a BSS.The most citation form of association is website mutual direct communication in ad-hoc network, and this is called as independent BSS.More common situation is STA and full-time administrative BSS, be called as the central location of access point (AccessPoint, AP) is associated.The BSS being based upon AP periphery is called as the BSS of band infrastructure.BSS with infrastructure can be interconnected by distributed system by their AP, figure 1 illustrates the independent basic service set BSS1 in WLAN and Basic Service Set BSS2, BSS3 of being with infrastructure.
Introduce this concept of transmission opportunity (Transmissionopportunity, TXOP) in 802.11e revision, a TXOP refers to the bounded period that website can transmit specific communications classification.Website obtains TXOP by competition, once obtain TXOP, website can transmitting data frame, control frame and management frames and receive response frame.
In 802.11n, when certain STA obtains a TXOP by channel competition, then this STA is called as TXOP owner (TXOPholder).In this TXOP, such as likely, the TXOP that TXOPholder obtains is longer for the period sent needed for data than it, therefore TXOP control temporarily can be given other STA by TXOPholder, other STA is allowed to send data to TXOPholder, this technology is called as reverse authorizing (Reversedirectiongrant, RDG).TXOPholder is called as reverse promoter (ReverseDirectionInitiator, RDInitiator), the STA temporarily the obtaining TXOP control person (ReverseDirectionResponder, RDResponder) that is called as inverse response is authorized by RDInitiator.
In most cases, TXOPholder does not also know in the buffer memory of its communication object, whether available for transmission is to the data of oneself, usual RDInitiator does not know the data whether having in the buffer memory of RDResponder and be transferred to RDInitiator when starting RDG yet, thus have impact on efficiency and the service quality QoS of transfer of data.Authorize for reverse especially, do not know that in RDresponder buffer memory, whether available for transmission is to the data of RDInitiator due to RDInitiator, invalid RDG likely occurs, and (namely RDInitiator starts RDG, and now RDResponder will not be transferred to the data of RDInitiator), thus have impact on RDG efficiency of transmission.
Summary of the invention
A kind of data transferring method and device is provided in the embodiment of the present invention.
According to an aspect, propose a kind of data transferring method, comprise: the first data link sends the first transmission frame to the second data link, comprise in the first data link to be transmitted to the data cached information of the second data link in described first transmission frame, it is the mandate that the first data link is initiated according to described data cached information that first data link obtains the second data link having a transmission opportunity, and the first data link utilizes described mandate to be data cachedly transferred to the second data link by described.
According to another aspect, propose a kind of data transferring method, comprise: the second data link receives the first transmission frame that the first data link sends, comprise in the first data link to be transmitted to the data cached information of the second data link in described first transmission frame, the second data link having transmission opportunity is the first data link mandate according to described data cached information, and described first data link of the second data link reception utilizes the described data cached of described mandate transmission.
According to another aspect, propose a kind of first data link, comprise: the first dispensing device, for sending the first transmission frame to the second data link, comprise in the first data link to be transmitted to the data cached information of the second data link in described first transmission frame, and data cached be transferred to the second data link for utilizing to authorize by described; Acquisition device is the mandate that the first data link is initiated for obtaining the second data link of having transmission opportunity according to described data cached information.
According to another aspect, propose a kind of second data link, comprising: receiving system, for receiving the first transmission frame that the first data link sends, comprising in the first data link to be transmitted to the data cached information of the second data link in described first transmission frame; And utilize the described data cached of mandate transmission for receiving described first data link; And authorization device, for being the first data link mandate according to described data cached information.
Due in the scheme of the embodiment of the present invention, to be transmitted to the data cached information of the second data link by comprising in the first data link in the first transmission frame of sending to the second data link at the first data link, therefore the second data link can utilize TXOP better according to this information, improves efficiency and the QoS of transfer of data.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 shows the independent basic service set in WLAN and is with the Basic Service Set of infrastructure.
Fig. 2 shows the flow chart of data transferring method according to an embodiment of the invention.
Fig. 3 top shows the general format of the frame of agreement 802.11n, and shows the concrete form of frame control field wherein in bottom.
Fig. 4 top shows the general format of the frame according to the embodiment of the present invention, and shows the concrete form of frame control field wherein in bottom.
Fig. 5 shows the form of ACK frame, CTS frame and BA frame according to the embodiment of the present invention.
Fig. 6 shows the frame format of frame format according to the data query frame type of the embodiment of the present invention and corresponding response frame.
Fig. 7 shows the flow chart of data transferring method according to another embodiment of the invention.
Fig. 8 shows the schematic diagram of the first data link according to the embodiment of the present invention.
Fig. 9 shows the schematic diagram of the second data link according to the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, carry out clear, complete description to the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, access point can as a special website, and the scheme of the embodiment of the present invention can be applied between common website, also can be applied between access point AP and common website.Therefore, the transfer of data between the first data link and the second data link is used to be described in the following examples.
Fig. 2 shows the flow chart of data transferring method according to an embodiment of the invention.Visible, the method comprises the steps.
Step 210, the first data link send the first transmission frame to the second data link, comprise in the first data link to be transmitted to the data cached information of the second data link in described first transmission frame.
In the scheme of the embodiment of the present invention, do not limit the type of the first transmission frame, it can be control frame, Frame or management frames etc.This first transmission frame can be the transmission frame sending to the second data link in different situations.Such as, according to a form of implementation, described first transmission frame is the first data link transmission frame to the second data link transmission when having transmission opportunity TXOP.That is, may be that first the first data link has transmission opportunity TXOP, but the first data link also complete the data transmission to the second data link in the period of this TXOP.Now, first data link can utilize the TXOP of oneself to send the first transmission frame (such as Frame) to the second data link, inform that the second data link exists in the buffer memory of the first data link to be transmitted to the information of the data of the second data link (" more data " field in such as Frame, when it is set to " 1 ", represent that available for transmission is to the data of the second data link, when it is set to " 0 ", indicate without to be transmitted to the data of the second data link).
Also possible that, according to another form of implementation, described first transmission frame is after receiving the second data link having transmission opportunity TXOP and being transferred to the second transmission frame of the first data link, and the first data link is the transmission frame that described second transmission frame of response sends to the second data link.That is, second data link has TXOP and transmits the second transmission frame (such as control frame) to the first data link, and the first data link sends the first transmission frame to second data link when responding this second transmission frame.Now, first transmission frame can be satisfactory any response frame, such as response frame CTS, the response frame ACK for individual data frame, the response frame BA etc. for data block of control frame RTS, also can be the response frame for newly-designed transmission frame type, a kind of form of this response frame can refer to Fig. 6, also will be specifically described hereinafter it.
In the scheme of the embodiment of the present invention, also do not limit the type of above-mentioned second transmission frame, it can be control frame, Frame or management frames etc., also can be the newly-designed transmission frame being different from existing type or subtype.Such as, frame type is determined by " type " and " subtype " field, and in prior art, type is mainly divided into control frame, Frame and management frames, comprises again some subtype under corresponding types.According to a form of implementation of the present invention, the reserved state of " subtype " field in frame control field can be utilized to define a kind of new frame type, and this new frame type indicates the first data link to need to comprise in the first data link to be transmitted to the data cached information of the second data link in the first transmission frame sent in response to described second transmission frame.Such as, in the prior art, " type " field represents control frame for time " 01 ", now, is reserved state when " subtype " field is " 0000 ".In embodiments of the present invention, " subtype " field can be defined as the frame type of data query when being " 0000 ".A kind of frame format of this frame type can refer to Fig. 6, also will be specifically described hereinafter it.This type indicates the first data link to be need to comprise described data cached information in the first transmission frame of sending of described second transmission frame of response thus.Also possible that, in the second transmission frame, increase new field, need to comprise described data cached information by this new field instruction first in the first transmission frame sent in response to described second transmission frame.
In the scheme of the embodiment of the present invention, comprise in the first data link to be transmitted to the data cached information of the second data link in the first transmission frame.For this reason, can indicate in the first transmission frame in the first data link whether exist to be transmitted to the data of the second data link, or in the first transmission frame, directly can indicate the type of giving the data of the second data link to be transmitted in the first data link, if or also can indicate in the first transmission frame in the first data link simultaneously whether exist to be transmitted to the data of the second data link and there are data time these data type.Also possible that, whether the first transmission frame to comprise other information such as data volume, data urgent etc.Those skilled in the art will know that, to be transmitted to the type of the data of the second data link, data volume, data whether these information urgent by indicating in the first transmission frame, in fact also indirectly show to exist in the first data link to be transmitted to the data of the second data link.
It is the mandate that the first data link is initiated according to described data cached information that step 220, the first data link obtain the second data link having transmission opportunity TXOP.At this, the second data link is the website being obtained transmission opportunity TXOP by channel competition, i.e. TXOPholder.It should be noted that, second data link is that the first data link initiation mandate comprises two kinds of situations according to described data cached information, specifically, when described data cached information show to exist in the first data link to be transmitted to the second data link data cached time, the second data link having transmission opportunity is that the first data link initiates to authorize, and described first data link correspondingly obtains mandate, when described data cached information show not exist in the first data link to be transmitted to the second data link data cached time, the the second data link refusal having transmission opportunity is that the first data link initiates to authorize.Especially, according to a kind of form of implementation, when authorizing, second data link is that the first data link initiates reversely to authorize according to described data cached information, makes the first data link that this reverse authorizing can be utilized to be transmittedly to be transferred to the second data link to the data cached of the second data link by described.
Step 230, the first data link utilize described mandate to be data cachedly transferred to the second data link by described.
To be transmitted to the data cached information of the second data link by indicating in the first transmission frame, the second data link can determine to initiate to authorize the need of for the first data link.Such as when do not exist in the first data link to be transmitted to the second data link data cached time, or when there is not the second data link current data type data cached in the first data link, second data link is not the first data link mandate, the second data link thus as TXOPholder can utilize TXOP better, improves the service quality QoS of transfer of data.Authorize for reverse especially, if RDInitiator knows in RDresponder buffer memory, whether available for transmission is to the data of RDInitiator, then can avoid generation (the i.e. RDInitiator startup RDG of invalid RDG, and now RDResponder will not be transferred to the data of RDInitiator), thus promote RDG efficiency of transmission.
In an embodiment of the present invention, the specific bit in frame can be utilized realize indicate in the first data link in the first transmission frame to be transmitted to the data cached information of the second data link.These bits can be in certain frame, do not comprise significant information field, can be reserved field in frame or also can be the field newly increased.Specifically described below.
Fig. 3 top shows the general format of the frame of agreement 802.11n, wherein also particularly illustrate the byte number (such as " frame control " field is 2 bytes) of each field according to this agreement, and Fig. 3 bottom shows the concrete form of frame control field wherein.
In the prior art, for " more data " field, in a power-save mode, in the Frame of clean culture or management frames, " more data " field be set to 1 for represent AP after the current frame buffer memory in also have the data of this STA.In other situations, this field is set to 0.But response frame CTS, ACK, BA etc. belong to control frame, and there will not be above-mentioned situation when control frame, that is, when control frame, this field does not indicate any significant information.In addition, for the Frame under other patterns and management frames, what " more data " field also can be utilized completely to indicate in the first data link whether available for transmission to the second data link is data cached.Therefore, in an embodiment of the present invention, this " more data " field can be utilized to indicate in the first data link to be transmitted to the data cached information of the second data link.
In addition, in the prior art, for " more bursts " field, if current data frame or management frames are fragment datas, namely also has other burst after which, when forming a partial data together with current slice, this field is set to 1, other time be set to 0.But response frame CTS, ACK, BA etc. belong to control frame, and there will not be above-mentioned situation when control frame, that is, when control frame, this field does not indicate any significant information.Therefore, when described first transmission frame to be the first data link be described second transmission frame of response the sends to transmission frame of the second data link, this " more bursts " field can be utilized to indicate in the first data link to be transmitted to the data cached information of the second data link.
In addition, in the prior art, for " retry " field, when being set to 1 in Frame or management frames, represent whether this frame is re-transmission, is set to 0 in other frames.But response frame CTS, ACK, BA etc. belong to control frame, there will not be above-mentioned situation when control frame, that is, when control frame, this field does not indicate any significant information.Therefore, when described first transmission frame to be the first data link be described second transmission frame of response the sends to transmission frame of the second data link, this " retry " field can be utilized to indicate in the first data link to be transmitted to the data cached information of the second data link.
In addition, in the prior art, for " protected frame " field, only have in Frame or " certification " management frames and this bit could be set to 1, frame (Framebody) field be used to indicate in this frame is encrypted.But response frame CTS, ACK, BA etc. belong to control frame, there will not be above-mentioned situation when control frame, that is, when control frame, this field does not indicate any significant information.Therefore; when described first transmission frame to be the first data link be described second transmission frame of response the sends to transmission frame of the second data link, this " protected frame " field can be utilized to indicate in the first data link to be transmitted to the data cached information of the second data link.
In addition, as can be seen from Fig. 3, in frame, comprise HT (HighThroughput) control field.One skilled in the art will appreciate that and to comprise not by the reserved field used in HT control field.Therefore, according to a form of implementation of the present invention, the reserved field in HT control field can be utilized indicate in the first data link to be transmitted to the data cached information of the second data link.
And in agreement 802.11ac, the HT control field in the frame shown in Fig. 3 changes into VHT (VeryHighThroughput) control field.Similarly, comprise not by the reserved field used in VHT control field.Therefore, according to a form of implementation of the present invention, the reserved field in VHT control field can be utilized indicate in the first data link to be transmitted to the data cached information of the second data link.
Therefore, according to one embodiment of present invention, when described first transmission frame to be the first data link be described second transmission frame of response the sends to transmission frame of the second data link, " more data " field of the frame control field of described first transmission frame can be utilized, " more bursts " field, " retry " field, the described data cached information of one or more bit instruction in these fields of reserved field of " protected frame " field and HT control field, or utilize " more data " field of described first transmission frame control field, " more bursts " field, " retry " field, the described data cached information of one or more bit instruction in these fields of reserved field of " protected frame " field and VHT control field.
Such as; according to a form of implementation; a bit can be selected from the reserved field (or reserved field of VHT control field) of " more data " field, " more bursts " field, " retry " field, " protected frame " field and HT control field; when this bit is set to 1; indicate data cached to the second data link of available for transmission in the first data link; or when this bit is set to 0, indicate data cached to the first data link of available for transmission in the second data link.Which kind of information the concrete numerical value of bit represents can come to specify arbitrarily as required, and do not affect essence of the present invention, this point is all applicable in the following embodiments, by no longer repeat specification.
Due in WLAN (wireless local area network) WLAN, different according to the priority of business, from high to low business is divided into roughly: audio frequency (Voice), video (Video), to do one's best (BestEffort) and background stream (Background).Generally speaking, the second data link wishes to receive the data with self same data type.Therefore, when utilizing a bit to indicate data cached information to the second data link to be transmitted in the first data link, also can be designed as when this bit is set to 1, indicate in the first data link and have the data cached of the second data link current data type; Or when this bit is set to 0, indicates in the first data link and there is no the data cached of the second data link current data type.Also possible that, when this bit is set to 0, indicates in the first data link and have the data cached of the second data link current data type; When this bit is set to 1, indicates in the first data link and there is no the data cached of the second data link current data type.It will be understood by those skilled in the art that when indicate in the first data link have the second data link current data type data cached time, shown that these data are data cached to the second data link to be transmitted.
According to another form of implementation, can from the reserved field (or reserved field of VHT control field) of " more data " field, " more bursts " field, " retry " field, " protected frame " field and HT control field, two bits be selected to indicate in the first data link to be transmitted to the data cached information of the second data link.
At this, what one in two bits can be used to indicate in the first data link whether available for transmission to the second data link is data cached, and whether another bit indicates this data cached is the first data link current data type.Such as, " more data " field to be set in instruction first data link data cached to the second data link of whether available for transmission.When available for transmission in the first data link gives the data of the second data link, whether " more bursts " field is set to indicate this data cached is the data of the second data link current data type.
In addition, as already mentioned above, when indicate in the first data link have the second data link current data type data cached time, shown that these data are to be transmitted to the data of the second data link.Therefore two bits all can be used to refer to data type.Because the priority according to business is different, from high to low business is divided into Four types roughly: audio frequency (Voice), video (Video), to do one's best (BestEffort) and background stream (Background), two bits therefore can be utilized to represent data cached type in the first data link respectively.Such as, these two bits can be utilized to be set to " 00 ", " 01 ", " 10 ", " 11 " and to represent priority type of service from low to high respectively.
According to another form of implementation, can from the reserved field (or reserved field of VHT control field) of " more data " field, " more bursts " field, " retry " field, " protected frame " field and HT control field, three bits be selected to indicate in the first data link to be transmitted to the data cached information of the second data link.
At this, what one in three bits can be used to indicate in the first data link whether available for transmission to the second data link is data cached, the data type that another two bits indicate this data cached.Such as, " more data " field to be set in instruction first data link data cached to the second data link of whether available for transmission.When available for transmission in the first data link gives the second data link data cached, " more bursts " field and " retry " field are set to the data type indicating this data cached.Similarly, two bits can indicate 4 kinds of data types.
In addition, when indicating the data cached type in the first data link, shown this data cached be to be transmitted to the data of the second data link.Therefore three bits all can be used to refer to data cached type.Those skilled in the art will know that, different according to the priority of business, from high to low business is divided into Four types roughly: audio frequency (Voice), video (Video), to do one's best (BestEffort) and background stream (Background), and every type can also be further subdivided into two types, there are 8 kinds of types of service segmented altogether, three bits therefore can be utilized to represent data cached type in the first data link respectively.Such as, these three bits can be utilized to be set to " 000 ", " 001 ", " 010 ", " 011 ", " 100 ", " 101 ", " 110 ", " 111 " and to represent priority type of service from low to high respectively.
According to another form of implementation, can from the reserved field (or reserved field of VHT control field) of " more data " field, " more bursts " field, " retry " field, " protected frame " field and HT control field, four bits be selected to indicate in the first data link to be transmitted to the data cached information of the second data link.
At this, what one in four bits can be used to indicate in the first data link whether available for transmission to the second data link is data cached, the data type that other three bits indicate this data cached.Such as, " more data " field to be set in instruction first data link data cached to the second data link of whether available for transmission.When available for transmission in the first data link gives the second data link data cached, " more bursts " field, " retry " field and " protected frame " field are set to the data type indicating this data cached.Three bits can indicate 8 kinds of data types segmented.
In addition, as already mentioned above, when indicate in the first data link have the second data link current data type data cached time, shown this data cached be to be transmitted to the data of the second data link.Therefore four bits all can be used to refer to data type.Those skilled in the art will know that, although different according to the priority of business, from high to low business is subdivided into 8 types altogether, but also may there is the situation of multiple business type hybrid, not only such as existing audio service but also have video traffic etc., therefore utilizes four bits more specifically can represent the situation that miscellaneous service type hybrid exists.
Utilize 1 bit to 4 bit to indicate the situation of data cached information although simply show above, but be to be understood that this not limitation of the present invention, such as the type of service of 8 kinds of segmentations, 8 bits can be used to indicate all types of service to mix situation about existing respectively, or whether other information that multiple bit can be used to carry out designation data are as urgent in data, data volume etc.
Similarly, when described first transmission frame be the first data link when having transmission opportunity to second data link send transmission frame time, the described data cached information of one or more bit instruction in these fields of reserved field of " more data " field of the frame control field of described first transmission frame and HT control field can be utilized, or utilize the described data cached information of one or more bit instruction in these fields of reserved field of " more data " field of the frame control field of described first transmission frame and VHT control field.About specifically how utilizing these bits to be similar to above-described situation to indicate described data cached info class, no longer repeat here.
According to another form of implementation of the present invention, field can be increased in the first transmission frame, and utilize the field increased to indicate in the first data link to be transmitted to the data cached information of the second data link.Fig. 4 shows the frame format according to the embodiment of the present invention.Visible, compared to the frame format of the prior art shown in Fig. 3, the frame format shown in Fig. 4 comprises " data cached information " field, is used to indicate in the first data link to be transmitted to the data cached information of the second data link.Although be noted that in Fig. 4 that schematically illustrating this field is 1 byte i.e. 8 bits, and place it in MAC head, those skilled in the art can adjust according to actual needs, and this does not affect essence of the present invention.
Correspondingly, Fig. 5 shows the form of ACK frame according to an embodiment of the invention, CTS frame and BA frame.Visible, when the first transmission frame is response frame ACK, CTS and BA, field " data cached information " can be added and be used to indicate in the first data link to be transmitted to the data cached information of the second data link.Also possible that, utilize the existing field in the field of interpolation and previous embodiment simultaneously.Such as, " more data " field can be utilized to indicate in the first data link whether be cached with to be transmitted to the data of the second data link, and in the field of adding the type of designation data, when " more data " bit is set to 1 (exist to be transmitted to the first data link data cached), just there is the field (field " 11111111 " of such as adding represents that the data of each type exist) of adding, otherwise the field of adding does not exist.Certain those skilled in the art also can carry out to arrange arbitrarily these available fields as required.
By utilizing the method for the embodiment of the present invention, indicate in the first data link to be transmitted to the information being cached in data of the second data link in the first transmission frame, make the second data link as TXOPholder can utilize TXOP better, improve the service quality QoS of transfer of data.Authorize for reverse especially, if RDInitiator knows in RDresponder buffer memory, whether available for transmission is to the data of RDInitiator, then can avoid generation (the i.e. RDInitiator startup RDG of invalid RDG, and now RDResponder will not be transferred to the data of RDInitiator), thus promote RDG efficiency of transmission.
Fig. 6 shows the frame format according to the frame format of the data query frame type of the embodiment of the present invention and the response frame of correspondence.As mentioned above like that, in the prior art, " type " field represents control frame for time " 01 ", now, is reserved state when " subtype " field is " 0000 ".In embodiments of the present invention, " subtype " field can be defined as the frame type of data query when being " 0000 ".In addition, comprise " data cached information " field at the data query response frame of correspondence, be used to indicate in the first data link to be transmitted to the data cached information of the second data link.Utilize this data query frame and corresponding data query response frame, effectively can realize the method that the embodiment of the present invention proposes.
Fig. 7 shows the flow chart of data transferring method according to another embodiment of the invention.Visible, the method comprises the steps.
Step 710, the second data link receive the first transmission frame that the first data link sends, and comprise in the first data link to be transmitted to the data cached information of the second data link in described first transmission frame.
Step 720, the second data link having a transmission opportunity are the first data link mandate according to described data cached information.
Step 730, the second data link receive described first data link and utilize described described data of authorizing transmission.
Detail about this embodiment see the corresponding contents above described in detail by composition graphs 2 to Fig. 6, no longer can repeat here.
By utilizing the method for the embodiment of the present invention, indicate in the first data link to be transmitted to the data cached information of the second data link in the first transmission frame, make the second data link as TXOPholder can utilize TXOP better, improve the service quality QoS of transfer of data.Authorize for reverse especially, if RDInitiator knows in RDresponder buffer memory, whether available for transmission is to the data of RDInitiator, then can avoid generation (the i.e. RDInitiator startup RDG of invalid RDG, and now RDResponder will not be transferred to the data of RDInitiator), thus promote RDG efficiency of transmission.
Correspondingly, according to embodiments of the invention, propose a kind of data link.Fig. 8 shows the schematic diagram of the first data link 800 according to the embodiment of the present invention.Visible, this data link 800 comprises: the first dispensing device 810, for sending the first transmission frame to the second data link, comprise in the first data link to be transmitted to the data cached information of the second data link in described first transmission frame, and for utilizing to authorize, described data are transferred to the second data link; Acquisition device 820 is the mandate that the first data link is initiated for obtaining the second data link of having transmission opportunity according to described data cached information.
According to a form of implementation, described first transmission frame is the first data link transmission frame to the second data link transmission when having transmission opportunity, or described first transmission frame is after receiving the second data link having transmission opportunity and being transferred to the second transmission frame of the first data link, the first data link is the transmission frame that described second transmission frame of response sends to the second data link.
According to a form of implementation, described data cached information comprise whether exist be cached in the first data link to be transmitted whether urgent to the type of the data of the second data link, data, data volume and data in one of at least.
According to a form of implementation, when described first transmission frame be the first data link when having transmission opportunity to second data link send transmission frame time, utilize the described data cached information of one or more bit instruction in these fields of reserved field of " more data " field of the frame control field of described first transmission frame and HT control field, or utilize " more data " field of the frame control field of described first transmission frame, and the described data cached information of one or more bit instruction in these fields of the reserved field of VHT control field, or utilize the described data cached information of field instruction increased in described first transmission frame, when described first transmission frame is after receiving the second data link having transmission opportunity and being transferred to the second transmission frame of the first data link, first data link is that response described second transmission frame is when sending to the transmission frame of the second data link, utilize " more data " field of the frame control field of described first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit instruction in the reserved field of " protected frame " field and HT control field, or utilize " more data " field of the frame control field of described first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit instruction in the reserved field of " protected frame " field and VHT control field, or utilize the described data cached information of field instruction increased in described first transmission frame.
According to a form of implementation, described second transmission frame indicates the first data link the need of comprising described data cached information in the first transmission frame.
According to a form of implementation, described acquisition device is that reverse that described first data link is initiated is authorized specifically for obtaining the second data link according to described data cached information.
Correspondingly, according to embodiments of the invention, propose another kind of data link.Fig. 9 shows the schematic diagram of the second data link 900 according to the embodiment of the present invention.Visible, this data link 900 comprises: receiving system 910, for receiving the first transmission frame that the first data link sends, comprise in the first data link to be transmitted to the data cached information of the second data link in described first transmission frame, and for receive described first data link utilize authorize transmit described data cached; And authorization device 920, for being the first data link mandate according to described data cached information.
According to a form of implementation, described first transmission frame is the first data link transmission frame to the second data link transmission when having transmission opportunity, or described second data link also comprises the second dispensing device 930, for the second transmission frame being transferred to the first data link when the second data link has transmission opportunity, described first transmission frame is after receiving the second data link having transmission opportunity and being transferred to the second transmission frame of the first data link, first data link is the transmission frame that described second transmission frame of response sends to the second data link.
According to a form of implementation, described data cached information comprise whether exist be cached in the first data link to be transmitted whether urgent to the type of the data of the second data link, data, data volume and data in one of at least.
According to a form of implementation, when described first transmission frame be the first data link when having transmission opportunity to second data link send transmission frame time, utilize the described data cached information of one or more bit instruction in " more data " field of the frame control field of described first transmission frame and the reserved field of HT control field, or utilize " more data " field of the frame control field of described first transmission frame, and the described data cached information of one or more bit instruction in the reserved field of VHT control field, or utilize the described data cached information of field instruction increased in described first transmission frame, when described first transmission frame is after receiving the second data link having transmission opportunity and being transferred to the second transmission frame of the first data link, first data link is that response described second transmission frame is when sending to the transmission frame of the second data link, utilize " more data " field of the frame control field of described first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit instruction in the reserved field of " protected frame " field and HT control field, or utilize " more data " field of the frame control field of described first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit instruction in these fields of reserved field of " protected frame " field and VHT control field, or utilize the described data cached information of field instruction increased in described first transmission frame.
According to a form of implementation, described second transmission frame indicates the first data link the need of comprising described data cached information in the first transmission frame.
According to a form of implementation, described authorization device is specifically for starting reverse the authorizing for described first data link initiation according to described data cached information.
By utilizing the data link of the embodiment of the present invention, indicate in the first data link to be transmitted to the data cached information of the second data link in the first transmission frame, make the second data link as TXOPholder can utilize TXOP better, improve the service quality QoS of transfer of data.Authorize for reverse especially, if RDInitiator knows in RDresponder buffer memory, whether available for transmission is to the data of RDInitiator, then can avoid generation (the i.e. RDInitiator startup RDG of invalid RDG, and now RDResponder will not be transferred to the data of RDInitiator), thus promote RDG efficiency of transmission.
It should be appreciated by those skilled in the art that in the embodiment of the present invention, the function that is divided into of apparatus module divides, actual concrete structure can be fractionation or the merging of above-mentioned functions module.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The scheme of the content record of claim is also the protection range of the embodiment of the present invention.
One of ordinary skill in the art will appreciate that all or part of process in above-described embodiment method is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a data transferring method, comprising:
First data link sends the first transmission frame to the second data link, comprises in the first data link to be transmitted to the data cached information of the second data link in described first transmission frame,
It is the mandate that the first data link is initiated according to described data cached information that first data link obtains the second data link having transmission opportunity, and
First data link utilizes described mandate to be data cachedly transferred to the second data link by described;
It is that the mandate that the first data link is initiated specifically comprises according to described data cached information that wherein said first data link obtains the second data link having transmission opportunity:
When described data cached information show to exist in the first data link to be transmitted to the second data link data cached time, the second data link having transmission opportunity is that the first data link initiates to authorize, and described first data link correspondingly obtains mandate
When described data cached information show not exist in the first data link to be transmitted to the second data link data cached time, the second data link refusal having transmission opportunity is that the first data link initiates to authorize.
2. method according to claim 1, wherein
Described first transmission frame is the first data link transmission frame to the second data link transmission when having transmission opportunity, or
Described first transmission frame is after receiving the second data link having transmission opportunity and being transferred to the second transmission frame of the first data link, and the first data link is the transmission frame that described second transmission frame of response sends to the second data link.
3. method according to claim 1, wherein said data cached information comprise whether exist be cached in the first data link to be transmitted whether urgent to the type of the data of the second data link, data, data volume and data in one of at least.
4. method according to claim 2, wherein
When described first transmission frame be the first data link when having transmission opportunity to second data link send transmission frame time, utilize " more data " field of the frame control field of described first transmission frame, and the described data cached information of one or more bit instruction in these fields of the reserved field of HT control field, or utilize " more data " of the frame control field of described first transmission frame, and the described data cached information of one or more bit instruction in these fields of the reserved field of VHT control field, or utilize the described data cached information of field instruction increased in described first transmission frame,
When described first transmission frame is after receiving the second data link having transmission opportunity and being transferred to the second transmission frame of the first data link, first data link is that response described second transmission frame is when sending to the transmission frame of the second data link, utilize " more data " field of the frame control field of described first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit instruction in these fields of reserved field of " protected frame " field and HT control field, or utilize " more data " field of the frame control field of described first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit instruction in these fields of reserved field of " protected frame " field and VHT control field, or utilize the described data cached information of field instruction increased in described first transmission frame.
5. method according to claim 2, wherein said second transmission frame indicates the first data link the need of comprising described data cached information in the first transmission frame.
6. the method according to any one in claim 1 to 5, the second data link wherein having transmission opportunity is that the mandate that the first data link is initiated comprises according to described data cached information: the second data link is that reverse that described first data link is initiated is authorized according to described data cached information.
7. a data transferring method, comprising:
Second data link receives the first transmission frame that the first data link sends, and comprises in the first data link to be transmitted to the data cached information of the second data link in described first transmission frame,
The second data link having transmission opportunity is the first data link mandate according to described data cached information, and
Second data link receives described first data link and utilizes the described data cached of described mandate transmission;
The second data link wherein having transmission opportunity is that the first data link mandate specifically comprises according to described data cached information:
When described data cached information show to exist in the first data link to be transmitted to the second data link data cached time, the second data link having transmission opportunity is that the first data link initiates to authorize,
When described data cached information show not exist in the first data link to be transmitted to the second data link data cached time, the second data link refusal having transmission opportunity is that the first data link initiates to authorize.
8. method according to claim 7, wherein
Described first transmission frame is the first data link transmission frame to the second data link transmission when having transmission opportunity, or
Described first transmission frame is after receiving the second data link having transmission opportunity and being transferred to the second transmission frame of the first data link, and the first data link is the transmission frame that described second transmission frame of response sends to the second data link.
9. method according to claim 7, wherein said data cached information comprise whether exist be cached in the first data link to be transmitted whether urgent to the type of the data of the second data link, data, data volume and data in one of at least.
10. method according to claim 8, wherein
When described first transmission frame be the first data link when having transmission opportunity to second data link send transmission frame time, utilize " more data " field of the frame control field of described first transmission frame, and the described data cached information of one or more bit instruction in these fields of the reserved field of HT control field, or utilize " more data " field of the frame control field of described first transmission frame, and the described data cached information of one or more bit instruction in these fields of the reserved field of VHT control field, or utilize the described data cached information of field instruction increased in described first transmission frame,
When described first transmission frame is after receiving the second data link having transmission opportunity and being transferred to the second transmission frame of the first data link, first data link is that response described second transmission frame is when sending to the transmission frame of the second data link, utilize " more data " field of the frame control field of described first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit instruction in these fields of reserved field of " protected frame " field and HT control field, or utilize " more data " field of the frame control field of described first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit instruction in these fields of reserved field of " protected frame " field and VHT control field, or utilize the described data cached information of field instruction increased in described first transmission frame.
11. methods according to claim 8, wherein said second transmission frame indicates the first data link the need of comprising described data cached information in the first transmission frame.
12. methods according to any one in claim 7 to 11, the second data link wherein having transmission opportunity is that the mandate that the first data link is initiated comprises according to described data cached information: the second data link starts according to described data cached information reversely authorizing of initiating for described first data link.
13. a kind of first data link, comprising:
First dispensing device, for sending the first transmission frame to the second data link, comprise in the first data link to be transmitted to the data cached information of the second data link in described first transmission frame, and data cached be transferred to the second data link for utilizing to authorize by described;
Acquisition device is the mandate that the first data link is initiated for obtaining the second data link of having transmission opportunity according to described data cached information;
Wherein obtaining the second data link having transmission opportunity is that the mandate that the first data link is initiated specifically comprises according to described data cached information:
When described data cached information show to exist in the first data link to be transmitted to the second data link data cached time, the second data link having transmission opportunity is that the first data link initiates to authorize, and described first data link correspondingly obtains mandate
When described data cached information show not exist in the first data link to be transmitted to the second data link data cached time, the second data link refusal having transmission opportunity is that the first data link initiates to authorize.
14. first data links according to claim 13, wherein
Described first transmission frame is the first data link transmission frame to the second data link transmission when having transmission opportunity, or
Described first transmission frame is after receiving the second data link having transmission opportunity and being transferred to the second transmission frame of the first data link, and the first data link is the transmission frame that described second transmission frame of response sends to the second data link.
15. a kind of second data link, comprising:
Receiving system, for receiving the first transmission frame that the first data link sends, comprises in the first data link to be transmitted to the data cached information of the second data link in described first transmission frame; And utilize the described data cached of mandate transmission for receiving described first data link; And
Authorization device, for being the first data link mandate according to described data cached information;
Be wherein that the first data link mandate specifically comprises according to described data cached information:
When described data cached information show to exist in the first data link to be transmitted to the second data link data cached time, the second data link having transmission opportunity is that the first data link initiates to authorize,
When described data cached information show not exist in the first data link to be transmitted to the second data link data cached time, the second data link refusal having transmission opportunity is that the first data link initiates to authorize.
16. second data links according to claim 15, wherein
Described first transmission frame is the first data link transmission frame to the second data link transmission when having transmission opportunity, or
Described second data link also comprises the second dispensing device, for the second transmission frame being transferred to the first data link when the second data link has transmission opportunity, described first transmission frame is after receiving the second data link having transmission opportunity and being transferred to the second transmission frame of the first data link, and the first data link is the transmission frame that described second transmission frame of response sends to the second data link.
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| CN201110339327.8A CN103095364B (en) | 2011-11-01 | 2011-11-01 | Data transferring method and device |
| PCT/CN2012/083939 WO2013064090A1 (en) | 2011-11-01 | 2012-11-01 | Data transfer method and device |
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| CN201110339327.8A CN103095364B (en) | 2011-11-01 | 2011-11-01 | Data transferring method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101529824A (en) * | 2006-10-19 | 2009-09-09 | 高通股份有限公司 | Power save enhancements for wireless communication |
| WO2010128623A1 (en) * | 2009-05-08 | 2010-11-11 | ソニー株式会社 | Communication system, communication device, communication method, and computer program |
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| TWI380633B (en) * | 2003-10-15 | 2012-12-21 | Qualcomm Inc | Method, apparatus, and system for multiplexing protocol data units |
| JP4322836B2 (en) * | 2005-03-31 | 2009-09-02 | 株式会社東芝 | Wireless communication system |
| US20090109916A1 (en) * | 2007-10-31 | 2009-04-30 | Nokia Corporation | Method and apparatus for providing a shared reservation acknowledgement channel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101529824A (en) * | 2006-10-19 | 2009-09-09 | 高通股份有限公司 | Power save enhancements for wireless communication |
| WO2010128623A1 (en) * | 2009-05-08 | 2010-11-11 | ソニー株式会社 | Communication system, communication device, communication method, and computer program |
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