CN103095364A - Method and device for data transmission - Google Patents
Method and device for data transmission Download PDFInfo
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- CN103095364A CN103095364A CN2011103393278A CN201110339327A CN103095364A CN 103095364 A CN103095364 A CN 103095364A CN 2011103393278 A CN2011103393278 A CN 2011103393278A CN 201110339327 A CN201110339327 A CN 201110339327A CN 103095364 A CN103095364 A CN 103095364A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- 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
Abstract
The invention discloses a method and a device for data transmission. The method comprises that a first data transmission device sends a first transmission frame to a second data transmission device, the first transmission frame comprises caching data information in the first data transmission device, wherein, the caching data information is ready to sent to the second data transmission device, the first data transmission device obtains authorization started by the second data transmission device with a transmission chance according the caching data information, and the first data transmission device uses the authorization to send the caching data information to the second data transmission device.
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 (Basic Service Set, BSS) is the element of WLAN (wireless local area network) (Wireless Local Area Network, WLAN).Within being in a certain particular coverage and have certain related website (Station, STA) and form a BSS.Related citation form is website direct communication mutually in ad-hoc network, and this is called as independent BSS.The central location that more common situation is STA and full-time administrative BSS, be called as access point (Access Point, AP) is associated.The BSS that is based upon the AP periphery is called as the BSS with infrastructure.BSS with infrastructure can be interconnected by distributed system by their AP, figure 1 illustrates in WLAN independent basic service set BSS1 and with Basic Service Set BSS2, the BSS3 of infrastructure.
802.11e introduced this concept of transmission opportunity (Transmission opportunity, TXOP) in revision, a TXOP refers to the bounded period that website can transmit the specific communications classification.Website obtains TXOP by competition, in case obtained TXOP, website can transmitting data frame, control frame and management frames and receive response frame.
In 802.11n, when certain STA obtained a TXOP by channel competition, this STA was called as TXOP owner (TXOP holder).In this TXOP, for example possiblely be, it is longer that the TXOP that TXOP holder obtains is used for sending the required period of data than it, therefore TXOP holder can temporarily give other STA with the TXOP control, allow other STA send data to TXOP holder, this technology is called as reverse authorizing (Reverse direction grant, RDG).TXOP holder is called as reverse promoter (Reverse Direction Initiator, RD Initiator), authorized the STA of the temporary transient TXOP of the acquisition control person (Reverse Direction Responder, RD Responder) that is called as the inverse response by RD Initiator.
In most cases, TXOP holder does not also know whether remain to be transferred to the data of oneself in the buffer memory of its communication object, do not know when usually RD Initiator starts RDG in the buffer memory of RD Responder whether the data that are transferred to RD Initiator are arranged yet, thereby affected efficient and the service quality QoS of transfer of data.Authorize for reverse especially, due to RD Initiator and do not know whether to remain to be transferred in RD responder buffer memory the data of RD Initiator, it (is that RD Initiator starts RDG that invalid RDG might occur, and this moment, RD Responder did not have to be transferred to the data of RD Initiator), thus the RDG efficiency of transmission affected.
Summary of the invention
A kind of data transferring method and device are provided in the embodiment of the present invention.
According to an aspect, a kind of data transferring method has been proposed, comprise: the first data link sends the first transmission frame to the second data link, comprise the data cached information to the second data link to be transmitted in the first data link in described the first transmission frame, it is the mandate that the first data link is initiated according to described data cached information that the first data link obtains the second data link that has transmission opportunity, and the first data link utilizes described mandate with described data cached second data link that is transferred to.
According to another aspect, a kind of data transferring method has been proposed, comprise: the second data link receives the first transmission frame that the first data link sends, comprise the data cached information to the second data link to be transmitted in the first data link in described the first transmission frame, the second data link that has transmission opportunity is the first data link mandate according to described data cached information, and described the first data link of the second data link reception utilizes the described data cached of described mandate transmission.
According to another aspect, a kind of the first data link has been proposed, comprise: the first dispensing device, be used for sending the first transmission frame to the second data link, comprise the data cached information to the second data link to be transmitted in the first data link in described the first transmission frame, and be used for utilizing mandate with described data cached second data link that is transferred to; Deriving means, being used for obtaining the second data link that has transmission opportunity is the mandate that the first data link is initiated according to described data cached information.
According to another aspect, a kind of the second data link has been proposed, comprise: receiving system, be used for receiving the first transmission frame that the first data link sends, comprise the data cached information to the second data link to be transmitted in the first data link in described the first transmission frame; And for receiving described data cached that described the first data link utilization mandate transmits; And authorization device, being used for is the first data link mandate according to described data cached information.
Due in the scheme of the embodiment of the present invention, by the data cached information to the second data link to be transmitted in comprising the first data link in the first transmission frame that sends to the second data link at the first data link, therefore the second data link can utilize TXOP better according to this information, improves efficient and the QoS of transfer of data.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 show in WLAN independent basic service set and 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 the bottom.
Fig. 4 top shows the general format according to the frame of the embodiment of the present invention, and shows the concrete form of frame control field wherein in the 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 according to the frame format of the data query frame type of the embodiment of the present invention and the frame format of 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 according to the first data link of the embodiment of the present invention.
Fig. 9 shows the schematic diagram according to the second data link of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete description, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Need to prove, access point can be used 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, use the transfer of data between the first data link and the second data link to describe in the following examples.
Fig. 2 shows the flow chart of data transferring method according to an embodiment of the invention.As seen, the method comprises the steps.
In the scheme of the embodiment of the present invention, the type of the first transmission frame do not limited, it can be control frame, Frame or the management frames etc.This first transmission frame can be in the situation that the different transmission frame that sends to the second data link.For example, according to a form of implementation, described the first transmission frame is the transmission frame that the first data link sends to the second data link when having transmission opportunity TXOP.That is to say, may be that at first the first data link has transmission opportunity TXOP, yet the first data link is not also completed to the data of the second data link and transmitted in the period of this TXOP.At this moment, the first data link can utilize the TXOP of oneself to send the first transmission frame (for example Frame) to the second data link, inform that there is information (" more data " field in Frame for example of the data to the second data link to be transmitted in the second data link in the buffer memory of the first data link, when it is set to " 1 ", expression remains to be transferred to the data of the second data link, when it was set to " 0 ", expression was without data of giving the second data link to be transmitted).
Also possible that, according to another form of implementation, described the first transmission frame is that the first data link sends to the transmission frame of the second data link for responding described the second transmission frame after receiving the second data link that has transmission opportunity TXOP and being transferred to the second transmission frame of the first data link.That is to say, the second data link has TXOP and transmits the second transmission frame (for example control frame) to the first data link, and the first data link sends the first transmission frame to second data link when this second transmission frame is responded.At this moment, the first transmission frame can be satisfactory any response frame, such as for the response frame CTS of control frame RTS, for the response frame ACK of individual data frame, for response frame BA of data block etc., it can be also the response frame for newly-designed transmission frame type, a kind of form of this response frame can with reference to Fig. 6, also will be specifically described it hereinafter.
In the scheme of the embodiment of the present invention, the type of above-mentioned the second transmission frame is not limited yet, it can be control frame, Frame or management frames etc., can be also the newly-designed transmission frame that is different from existing type or subtype.For example, frame type is definite by " type " and " subtype " field, and in prior art, type mainly is divided into control frame, Frame and management frames, comprises again some subtypes under corresponding types.According to a form of implementation of the present invention, can utilize a kind of new frame type of reserved state definition of " subtype " field in frame control field, the data cached information to the second data link to be transmitted during this new frame type indication the first data link needs to comprise the first data link in the first transmission frame that sends in response to described the second transmission frame.For example, in the prior art, " type " field represents control frame when being " 01 ", and at this moment, " subtype " field is reserved state when being " 0000 ".In embodiments of the present invention, be defined as the frame type of data query in the time of " subtype " field can being " 0000 ".A kind of frame format of this frame type can with reference to Fig. 6, also will be specifically described it hereinafter.This type indication the first data link is for needing to comprise described data cached information in the first transmission frame that responds described the second transmission frame and send thus.Also possible that, increase new field in the second transmission frame, need to comprise described data cached information by this new field indication first in the first transmission frame that sends in response to described the second transmission frame.
In the scheme of the embodiment of the present invention, comprise the data cached information to the second data link to be transmitted in the first data link in the first transmission frame.For this reason, can whether there be the data to the second data link to be transmitted in first transmission frame indicating the first data link, perhaps can directly indicate the type of giving the data of the second data link to be transmitted in the first data link in the first transmission frame, if perhaps also can indicate simultaneously the type of these data when whether having the data to the second data link to be transmitted in the first data link and having data in the first transmission frame.Also possible that, the first transmission frame comprises other information for example whether data volume, data is urgent etc.Those skilled in the art will know that, by in the first transmission frame indicating type of giving the data of the second data link to be transmitted, data volume, data urgent these information whether, in fact also indirectly show to have the data to the second data link to be transmitted in the first 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 that has transmission opportunity TXOP.At this, the second data link is to obtain the website of transmission opportunity TXOP, i.e. TXOP holder by channel competition.need to prove, the second data link is that the first data link initiates to authorize the two kinds of situations that comprise according to described data cached information, particularly, when described data cached information show exist in the first data link to be transmitted during to the second data link data cached, the second data link that has transmission opportunity is that the first data link initiates to authorize, and described the first data link correspondingly obtains mandate, when described data cached information show do not exist in the first data link to be transmitted during to the second data link data cached, the the second data link refusal that has transmission opportunity is that the first data link initiates to authorize.Especially, according to a kind of form of implementation, in the situation that authorize, the second data link is that the first data link is initiated reverse authorizing according to described data cached information, makes the first data link can utilize this reverse authorizing described data cached second data link that is transferred to the second data link to be transmitted.
By the first transmission frame indicating data cached information of giving the second data link to be transmitted, whether the second data link need can determine is that the first data link initiates to authorize.For example to be transmitted during to the second data link data cached when not existing in the first data link, perhaps when not having the second data link current data type data cached in the first data link, the second data link is not the first data link mandate, the second data link as TXOP holder can utilize TXOP better thus, improves the service quality QoS of transfer of data.Authorize for reverse especially, if RD Initiator knows the data that whether remain to be transferred to RD Initiator in RD responder buffer memory, can avoid the generation of invalid RDG (is that RD Initiator starts RDG, and this moment, RD Responder did not have to be transferred to the data of RD Initiator), thus the RDG efficiency of transmission promoted.
In an embodiment of the present invention, can utilize the specific bit in frame to realize the data cached information to the second data link to be transmitted in first transmission frame indicating the first data link.These bits can be not comprise significant information field in certain frame, can be the reserved field in frame or can be also the field that newly increases.The below is specifically described.
Fig. 3 top shows the general format of the frame of agreement 802.11n, wherein also specifically illustrated the byte number (for example " frame control " field is 2 bytes) according to each field of this agreement, and Fig. 3 bottom shows the concrete form of frame control field wherein.
In the prior art, for " more data " field, under battery saving mode, in the Frame or management frames of clean culture, " more data " field is set to 1 and is used for being illustrated in the data that the buffer memory of AP after present frame also has this STA.In other situations, this field is set to 0.Yet response frame CTS, ACK, BA etc. belong to control frame, in the situation that above-mentioned situation can not appear in control frame, that is to say, in the situation that this field of control frame is not indicated any significant information.In addition, for the Frame under other patterns and management frames, also can utilize in " more data " field indication the first data link whether remain to be transferred to the data cached of the second data link fully.Therefore, in an embodiment of the present invention, can utilize this " more data " field to indicate the data cached information to the second data link to be transmitted in the first 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 it, when consisting of a partial data together with current burst, this field is set to 1, other the time be set to 0.Yet response frame CTS, ACK, BA etc. belong to control frame, in the situation that above-mentioned situation can not appear in control frame, that is to say, in the situation that this field of control frame is not indicated any significant information.Therefore, when described the first transmission frame is the first data link when sending to the transmission frame of the second data link for responding described the second transmission frame, can utilize this " more bursts " field to indicate the data cached information to the second data link to be transmitted in the first data link.
In addition, in the prior art, for " retry " field, when being set to 1 in Frame or management frames, represent that whether this frame is re-transmission, is set to 0 in other frames.Yet response frame CTS, ACK, BA etc. belong to control frame, in the situation that above-mentioned situation can not appear in control frame, that is to say, in the situation that this field of control frame is not indicated any significant information.Therefore, when described the first transmission frame is the first data link when sending to the transmission frame of the second data link for responding described the second transmission frame, can utilize this " retry " field to indicate the data cached information to the second data link to be transmitted in the first data link.
In addition, in the prior art, for " protected frame " field, only have in Frame or " authentication " management frames and could be set to 1 by this bit, frame (Frame body) field that is used to indicate in this frame is encrypted.Yet response frame CTS, ACK, BA etc. belong to control frame, in the situation that above-mentioned situation can not appear in control frame, that is to say, in the situation that this field of control frame is not indicated any significant information.Therefore; when described the first transmission frame is the first data link when sending to the transmission frame of the second data link for responding described the second transmission frame, can utilize this " protected frame " field to indicate the data cached information to the second data link to be transmitted in the first data link.
In addition, as can be seen from Fig. 3, comprise HT (High Throughput) control field in frame.One skilled in the art will appreciate that in the HT control field and comprise the reserved field that is not used.Therefore, according to a form of implementation of the present invention, can utilize the reserved field in the HT control field to indicate the data cached information to the second data link to be transmitted in the first data link.
And in agreement 802.11ac, the HT control field in frame shown in Figure 3 is changed into VHT (Very High Throughput) control field.Similarly, comprise in the VHT control field reserved field that is not used.Therefore, according to a form of implementation of the present invention, can utilize the reserved field in the VHT control field to indicate the data cached information to the second data link to be transmitted in the first data link.
therefore, according to one embodiment of present invention, when described the first transmission frame is that the first data link is when sending to the transmission frame of the second data link for responding described the second transmission frame, can utilize " more data " field of the frame control field of described the first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit indication in these fields of reserved field of " protected frame " field and HT control field, perhaps utilize " more data " field of described the first transmission frame control field, " more bursts " field, " retry " field, the described data cached information of one or more bit indication in these fields of reserved field of " protected frame " field and VHT control field.
For example; according to a form of implementation; can select a bit from the reserved field (the perhaps 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 and remain to be transferred to the data cached of the second data link in the first data link; perhaps when this bit is set to 0, remain to be transferred to the data cached of the first data link in indication the second data link.The concrete numerical value of bit represents which kind of information can come to specify arbitrarily as required, does not affect essence of the present invention, and this point all is suitable in the following embodiments, with 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), do one's best (Best Effort) and background flows (Background).Generally speaking, the second data link wishes to receive the data with self same data type.Therefore, utilizing a bit in indicating the first data link during the data cached information to the second data link to be transmitted, also can be designed as when this bit is set to 1, in indication the first data link, the data cached of the second data link current data type arranged; Perhaps this bit is set at 0 o'clock, there is no the data cached of the second data link current data type in indication the first data link.Also possible that, this bit is set at 0 o'clock, in indication the first data link, the data cached of the second data link current data type is arranged; This bit is set at 1 o'clock, there is no the data cached of the second data link current data type in indication the first data link.It will be understood by those skilled in the art that when the second data link current data type data cached arranged in having indicated the first data link, shown that these data are data cached to the second data link to be transmitted.
According to another form of implementation, can select two bits to indicate the data cached information to the second data link to be transmitted in the first data link from the reserved field (the perhaps reserved field of VHT control field) of " more data " field, " more bursts " field, " retry " field, " protected frame " field and HT control field.
At this, can indicate with in two bits whether remain to be transferred to the data cached of the second data link in the first data link, whether another bit indicates this data cached is the first data link current data type.For example, " more data " field is set to indicate and whether remains to be transferred to the data cached of the second data link in the first data link.When remaining to be transferred to the data of the second data link in the first 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, such as already mentioned above, when the second data link current data type data cached arranged, shown that these data are data to the second data link to be transmitted in having indicated the first 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 roughly Four types: audio frequency (Voice), video (Video), do one's best (Best Effort) and background stream (Background), therefore can utilize two bits to represent respectively data cached type in the first data link.For example, can utilize these two bits to be set to " 00 ", " 01 ", " 10 ", " 11 " represent respectively priority type of service from low to high.
According to another form of implementation, can select three bits to indicate the data cached information to the second data link to be transmitted in the first data link from the reserved field (the perhaps reserved field of VHT control field) of " more data " field, " more bursts " field, " retry " field, " protected frame " field and HT control field.
At this, can indicate with in three bits whether remain to be transferred to the data cached of the second data link in the first data link, another two bits are indicated this data cached data type.For example, " more data " field is set to indicate and whether remains to be transferred to the data cached of the second data link in the first data link.When remaining to be transferred to the second data link data cached in the first data link, " more bursts " field and " retry " field are set to indicate this data cached data type.Similarly, two bits can be indicated 4 kinds of data types.
In addition, during data cached type in having indicated the first data link, shown this data cached be the data to the second data link to be transmitted.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 roughly Four types: audio frequency (Voice), video (Video), do one's best (Best Effort) and background stream (Background), and every type can also further be subdivided into two types, therefore the type of service that 8 kinds of segmentations are arranged altogether can utilize three bits to represent respectively data cached type in the first data link.For example, can utilize these three bits to be set to " 000 ", " 001 ", " 010 ", " 011 ", " 100 ", " 101 ", " 110 ", " 111 " represent respectively priority type of service from low to high.
According to another form of implementation, can select four bits to indicate the data cached information to the second data link to be transmitted in the first data link from the reserved field (the perhaps reserved field of VHT control field) of " more data " field, " more bursts " field, " retry " field, " protected frame " field and HT control field.
At this, can indicate with in four bits whether remain to be transferred to the data cached of the second data link in the first data link, other three bits are indicated this data cached data type.For example, " more data " field is set to indicate and whether remains to be transferred to the data cached of the second data link in the first data link.When remaining to be transferred to the second data link data cached in the first data link, " more bursts " field, " retry " field and " protected frame " field are set to indicate this data cached data type.Three bits can be indicated the data type of 8 kinds of segmentations.
In addition, such as already mentioned above, when the second data link current data type data cached arranged in having indicated the first data link, shown this data cached be the data to the second data link to be transmitted.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, yet also may there be the situation of multiple business type hybrid, namely for example existing audio service has again video traffic etc., therefore utilizes four bits can more specifically represent the situation that the various types of traffic mixing exists.
Although only having provided, the above utilize 1 bit to 4 bit to indicate the situation of data cached information, yet be to be understood that this is not limitation of the present invention, for example for the type of service of 8 kinds of segmentations, can indicate respectively all types of service to mix situation about existing with 8 bits, perhaps can come other information of designation data such as whether data are urgent, data volume etc. with a plurality of bits.
Similarly, when described the first transmission frame be the first data link send to the second data link when having transmission opportunity transmission frame the time, can utilize the described data cached information of one or more bits indication in these fields of reserved field of " more data " field of frame control field of described the first transmission frame and HT control field, perhaps utilize the described data cached information of one or more bits indication in these fields of reserved field of " more data " field of frame control field of described the first transmission frame and VHT control field.About specifically how utilizing these bits to indicate described data cached info class to be similar to above-described situation, no longer repeat here.
According to another form of implementation of the present invention, can increase field in the first transmission frame, and utilize the field that increases to indicate the data cached information to the second data link to be transmitted in the first data link.Fig. 4 shows the frame format according to the embodiment of the present invention.As seen, than frame format of the prior art shown in Figure 3, frame format shown in Figure 4 comprises " data cached information " field, is used to indicate the data cached information to the second data link to be transmitted in the first data link.Although be noted that exemplarily showing this field in Fig. 4 is i.e. 8 bits of 1 byte, and place it in the MAC head, those skilled in the art can adjust according to actual needs, 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.As seen, when the first transmission frame is response frame ACK, CTS and BA, can adds field " data cached information " and be used to indicate the data cached information to the second data link to be transmitted in the first data link.Also possible that, utilize simultaneously the field of interpolation and the existing field in previous embodiment.For example, can utilize " more data " field to indicate and whether be cached with the data to the second data link to be transmitted in the first data link, and in the type of the field indicating data of adding, when " more data " when bit is set to 1 (exist to be transmitted to the first data link data cached), just have the field (field " 11111111 " of for example adding represents that the data of each type exist) of adding, otherwise the field of adding does not exist.Certainly those skilled in the art also can come to arrange arbitrarily these available fields as required.
By utilizing the method for the embodiment of the present invention, the information that is cached in data of giving the second data link to be transmitted in first transmission frame indicating the first data link, make the second data link as TXOP holder can utilize better TXOP, improve the service quality QoS of transfer of data.Authorize for reverse especially, if RD Initiator knows the data that whether remain to be transferred to RD Initiator in RD responder buffer memory, can avoid the generation of invalid RDG (is that RD Initiator starts RDG, and this moment, RD Responder did not have to be transferred to the data of RD Initiator), thus the RDG efficiency of transmission promoted.
Fig. 6 shows the frame format according to the response frame of the frame format of the data query frame type of the embodiment of the present invention and correspondence.As above mentioned, in the prior art, " type " field represents control frame when being " 01 ", and at this moment, " subtype " field is reserved state when being " 0000 ".In embodiments of the present invention, be defined as the frame type of data query in the time of " subtype " field can being " 0000 ".In addition, comprise " data cached information " field at the data query response frame of correspondence, be used to indicate the data cached information to the second data link to be transmitted in the first data link.Utilize this data query frame and corresponding data query response frame, can effectively 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.As seen, the method comprises the steps.
Step 710, the second data link receive the first transmission frame that the first data link sends, and comprise the data cached information to the second data link to be transmitted in the first data link in described the first transmission frame.
Step 720, the second data link that has a transmission opportunity are the first data link mandate according to described data cached information.
Step 730, the second data link receive the described data that described the first data link utilizes described mandate to transmit.
Detail about this embodiment can referring to top in conjunction with Fig. 2 to Fig. 6 corresponding contents described in detail, no longer repeat here.
By utilizing the method for the embodiment of the present invention, data cached information of giving the second data link to be transmitted in first transmission frame indicating the first data link, make the second data link as TXOP holder can utilize better TXOP, improve the service quality QoS of transfer of data.Authorize for reverse especially, if RD Initiator knows the data that whether remain to be transferred to RD Initiator in RD responder buffer memory, can avoid the generation of invalid RDG (is that RD Initiator starts RDG, and this moment, RD Responder did not have to be transferred to the data of RD Initiator), thus the RDG efficiency of transmission promoted.
Correspondingly, according to embodiments of the invention, a kind of data link has been proposed.Fig. 8 shows the schematic diagram according to the first data link 800 of the embodiment of the present invention.As seen, this data link 800 comprises: the first dispensing device 810, be used for sending the first transmission frame to the second data link, comprise the data cached information to the second data link to be transmitted in the first data link in described the first transmission frame, and authorize described transfer of data to the second data link for utilizing; Deriving means 820, being used for obtaining the second data link that has transmission opportunity is the mandate that the first data link is initiated according to described data cached information.
According to a form of implementation, described the first transmission frame is the transmission frame that the first data link sends to the second data link when having transmission opportunity, perhaps described the first transmission frame is that the first data link sends to the transmission frame of the second data link for responding described the second transmission frame after receiving the second data link that has transmission opportunity and being transferred to the second transmission frame of the first data link.
According to a form of implementation, described data cached information comprise whether exist the type, data volume and the data that are cached in the data to the second data link to be transmitted, data in the first data link in whether urgent one of at least.
according to a form of implementation, when described the first transmission frame be the first data link send to the second data link when having transmission opportunity transmission frame the time, utilize the described data cached information of one or more bits indication in these fields of reserved field of " more data " field of frame control field of described the first transmission frame and HT control field, perhaps utilize " more data " field of the frame control field of described the first transmission frame, and the described data cached information of one or more bit indication in these fields of the reserved field of VHT control field, perhaps utilize the described data cached information of field indication that increases in described the first transmission frame, when described the first transmission frame be receiving the second transmission frame that the second data link that has transmission opportunity is transferred to the first data link after, when the first data link sends to the transmission frame of the second data link for responding described the second transmission frame, utilize " more data " field of the frame control field of described the first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit indication in the reserved field of " protected frame " field and HT control field, perhaps utilize " more data " field of the frame control field of described the first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit indication in the reserved field of " protected frame " field and VHT control field, perhaps utilize the described data cached information of field indication that increases in described the first transmission frame.
According to a form of implementation, whether described second transmission frame indication the first data link need to comprise described data cached information in the first transmission frame.
According to a form of implementation, it is reverse the authorizing that described the first data link is initiated according to described data cached information that described deriving means specifically is used for obtaining the second data link.
Correspondingly, according to embodiments of the invention, another kind of data link has been proposed.Fig. 9 shows the schematic diagram according to the second data link 900 of the embodiment of the present invention.As seen, this data link 900 comprises: receiving system 910, be used for receiving the first transmission frame that the first data link sends, comprise the data cached information to the second data link to be transmitted in the first data link in described the first transmission frame, and be used for receiving described data cached that described the first data link utilization mandate transmits; And authorization device 920, being used for is the first data link mandate according to described data cached information.
according to a form of implementation, described the first transmission frame is the transmission frame that the first data link sends to the second data link when having transmission opportunity, perhaps described the second data link also comprises the second dispensing device 930, be used for when the second data link has transmission opportunity, the second transmission frame being transferred to the first data link, described the first transmission frame is after receiving the second data link that has transmission opportunity and being transferred to the second transmission frame of the first data link, the first data link sends to the transmission frame of the second data link for responding described the second transmission frame.
According to a form of implementation, described data cached information comprise whether exist the type, data volume and the data that are cached in the data to the second data link to be transmitted, data in the first data link in whether urgent one of at least.
according to a form of implementation, when described the first transmission frame be the first data link send to the second data link when having transmission opportunity transmission frame the time, utilize the described data cached information of one or more bits indication in the reserved field of " more data " field of frame control field of described the first transmission frame and HT control field, perhaps utilize " more data " field of the frame control field of described the first transmission frame, and the described data cached information of one or more bit indication in the reserved field of VHT control field, perhaps utilize the described data cached information of field indication that increases in described the first transmission frame, when described the first transmission frame be receiving the second transmission frame that the second data link that has transmission opportunity is transferred to the first data link after, when the first data link sends to the transmission frame of the second data link for responding described the second transmission frame, utilize " more data " field of the frame control field of described the first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit indication in the reserved field of " protected frame " field and HT control field, perhaps utilize " more data " field of the frame control field of described the first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit indication in these fields of reserved field of " protected frame " field and VHT control field, perhaps utilize the described data cached information of field indication that increases in described the first transmission frame.
According to a form of implementation, whether described second transmission frame indication the first data link need to comprise described data cached information in the first transmission frame.
According to a form of implementation, described authorization device specifically is used for starting reverse the authorizing of initiating for described the first data link according to described data cached information.
By utilizing the data link of the embodiment of the present invention, data cached information of giving the second data link to be transmitted in first transmission frame indicating the first data link, make the second data link as TXOP holder can utilize better TXOP, improve the service quality QoS of transfer of data.Authorize for reverse especially, if RD Initiator knows the data that whether remain to be transferred to RD Initiator in RD responder buffer memory, can avoid the generation of invalid RDG (is that RD Initiator starts RDG, and this moment, RD Responder did not have to be transferred to the data of RD Initiator), thus the RDG efficiency of transmission promoted.
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 is divided, actual concrete structure can be fractionation or the merging of above-mentioned functions module.
The invention described above embodiment sequence number does not represent the quality of embodiment just to description.
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 processing in above-described embodiment method is to come the relevant hardware of instruction to complete by program, described program can be stored in a kind of computer-readable recording medium.
The above is only preferred embodiment of the present invention, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (18)
1. data transferring method comprises:
The first data link sends the first transmission frame to the second data link, comprises the data cached information to the second data link to be transmitted in the first data link in described the first transmission frame,
It is the mandate that the first data link is initiated according to described data cached information that the first data link obtains the second data link that has transmission opportunity, and
The first data link utilizes described mandate with described data cached second data link that is transferred to.
2. method according to claim 1, wherein
Described the first transmission frame is the transmission frame that the first data link sends to the second data link when having transmission opportunity, perhaps
Described the first transmission frame is that the first data link sends to the transmission frame of the second data link for responding described the second transmission frame after receiving the second data link that has transmission opportunity and being transferred to the second transmission frame of the first data link.
3. method according to claim 1, wherein said data cached information comprise whether exist the type, data volume and the data that are cached in the data to the second data link to be transmitted, data in the first data link in whether urgent one of at least.
4. method according to claim 2, wherein
when described the first transmission frame be the first data link send to the second data link when having transmission opportunity transmission frame the time, utilize " more data " field of the frame control field of described the first transmission frame, and the described data cached information of one or more bit indication in these fields of the reserved field of HT control field, perhaps utilize " more data " of the frame control field of described the first transmission frame, and the described data cached information of one or more bit indication in these fields of the reserved field of VHT control field, perhaps utilize the described data cached information of field indication that increases in described the first transmission frame,
when described the first transmission frame be receiving the second transmission frame that the second data link that has transmission opportunity is transferred to the first data link after, when the first data link sends to the transmission frame of the second data link for responding described the second transmission frame, utilize " more data " field of the frame control field of described the first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit indication in these fields of reserved field of " protected frame " field and HT control field, perhaps utilize " more data " field of the frame control field of described the first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit indication in these fields of reserved field of " protected frame " field and VHT control field, perhaps utilize the described data cached information of field indication that increases in described the first transmission frame.
5. method according to claim 2, whether wherein said second transmission frame indication the first data link need to comprise described data cached information in the first transmission frame.
6. the described method of any one according to claim 1 to 5, the second data link that wherein has 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 reverse the authorizing that described the first data link is initiated according to described data cached information.
7. it is that the mandate that the first data link is initiated specifically comprises according to described data cached information that the described method of any one according to claim 1 to 5, wherein said the first data link are obtained the second data link that has transmission opportunity:
When described data cached information show exist in the first data link to be transmitted during to the second data link data cached, the second data link that has transmission opportunity is that the first data link initiates to authorize, and described the first data link correspondingly obtains mandate
Do not exist to be transmittedly during to the second data link data cached in the first data link when described data cached information shows, the second data link refusal that has transmission opportunity is that the first data link initiates to authorize.
8. data transferring method comprises:
The second data link receives the first transmission frame that the first data link sends, and comprises the data cached information to the second data link to be transmitted in the first data link in described the first transmission frame,
The second data link that has transmission opportunity is the first data link mandate according to described data cached information, and
The second data link receives described the first data link and utilizes the described data cached of described mandate transmission.
9. method according to claim 8, wherein
Described the first transmission frame is the transmission frame that the first data link sends to the second data link when having transmission opportunity, perhaps
Described the first transmission frame is that the first data link sends to the transmission frame of the second data link for responding described the second transmission frame after receiving the second data link that has transmission opportunity and being transferred to the second transmission frame of the first data link.
10. method according to claim 8, wherein said data cached information comprise whether exist the type, data volume and the data that are cached in the data to the second data link to be transmitted, data in the first data link in whether urgent one of at least.
11. method according to claim 9, wherein
when described the first transmission frame be the first data link send to the second data link when having transmission opportunity transmission frame the time, utilize " more data " field of the frame control field of described the first transmission frame, and the described data cached information of one or more bit indication in these fields of the reserved field of HT control field, perhaps utilize " more data " field of the frame control field of described the first transmission frame, and the described data cached information of one or more bit indication in these fields of the reserved field of VHT control field, perhaps utilize the described data cached information of field indication that increases in described the first transmission frame,
when described the first transmission frame be receiving the second transmission frame that the second data link that has transmission opportunity is transferred to the first data link after, when the first data link sends to the transmission frame of the second data link for responding described the second transmission frame, utilize " more data " field of the frame control field of described the first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit indication in these fields of reserved field of " protected frame " field and HT control field, perhaps utilize " more data " field of the frame control field of described the first transmission frame, " more bursts " field, " retry " field, the described data cached information of one or more bit indication in these fields of reserved field of " protected frame " field and VHT control field, perhaps utilize the described data cached information of field indication that increases in described the first transmission frame.
12. method according to claim 9, whether wherein said second transmission frame indication the first data link need to comprise described data cached information in the first transmission frame.
13. the described method of any one according to claim 8 to 12, the second data link that wherein has 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 reverse the authorizing of initiating for described the first data link according to described data cached information.
14. the described method of any one according to claim 8 to 12, the second data link that wherein has transmission opportunity is that the first data link mandate specifically comprises according to described data cached information:
Exist to be transmittedly during to the second data link data cached in the first data link when described data cached information shows, the second data link that has transmission opportunity is that the first data link initiates to authorize,
Do not exist to be transmittedly during to the second data link data cached in the first data link when described data cached information shows, the second data link refusal that has transmission opportunity is that the first data link initiates to authorize.
15. a data link comprises:
The first dispensing device, be used for sending the first transmission frame to the second data link, comprise the data cached information to the second data link to be transmitted in the first data link in described the first transmission frame, and be used for utilizing mandate with described data cached second data link that is transferred to;
Deriving means, being used for obtaining the second data link that has transmission opportunity is the mandate that the first data link is initiated according to described data cached information.
16. the first data link according to claim 15, wherein
Described the first transmission frame is the transmission frame that the first data link sends to the second data link when having transmission opportunity, perhaps
Described the first transmission frame is that the first data link sends to the transmission frame of the second data link for responding described the second transmission frame after receiving the second data link that has transmission opportunity and being transferred to the second transmission frame of the first data link.
17. a data link comprises:
Receiving system is used for receiving the first transmission frame that the first data link sends, and comprises the data cached information to the second data link to be transmitted in the first data link in described the first transmission frame; And for receiving described data cached that described the first data link utilization mandate transmits; And
Authorization device, being used for is the first data link mandate according to described data cached information.
18. the second data link according to claim 17, wherein
Described the first transmission frame is the transmission frame that the first data link sends to the second data link when having transmission opportunity, perhaps
Described the second data link also comprises the second dispensing device, be used for when the second data link has transmission opportunity, the second transmission frame being transferred to the first data link, described the first transmission frame is that the first data link sends to the transmission frame of the second data link for responding described the second transmission frame after receiving the second data link that has transmission opportunity and being transferred to the second transmission frame of the first 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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| CN103095364B CN103095364B (en) | 2016-01-27 |
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| WO2023279359A1 (en) * | 2021-07-09 | 2023-01-12 | 华为技术有限公司 | Communication method and apparatus |
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| 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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| CN102571801B (en) * | 2003-10-15 | 2015-09-09 | 高通股份有限公司 | For the method for Peer Data Communication |
| 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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| US20060221879A1 (en) * | 2005-03-31 | 2006-10-05 | Tetsu Nakajima | Radio communication system |
| 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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| WO2023279359A1 (en) * | 2021-07-09 | 2023-01-12 | 华为技术有限公司 | Communication method and apparatus |
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