CN101124762A - System and method for variable length acknowledgements in a shared resource network - Google Patents
System and method for variable length acknowledgements in a shared resource network Download PDFInfo
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Abstract
A system and method for producing a variable length aggregate acknowledgment frame in a shared resource network is provided. A plurality of frames is received, and receipt status information regarding the plurality of frames is generated. An aggregate acknowledgment frame comprising an acknowledgment information field containing the receipt status information is produced. A length of the receipt status information is dependent on a number of the plurality of frames.
Description
Technical field
The present invention relates to the shared resource network technology, and be particularly related to the mechanism of the channel usage that is used to strengthen shared resource network.More specifically, the invention provides the system and method that is used for providing variable length acknowledgements (acknowledgement) in shared resource network.
Background technology
The wireless terminal in a lot of present age is suitable for providing the communication service of quite a lot of kind.For example, a terminal may can provide circuit switched voice and data transfer services, and packet-switched data transfer services and messenger service.Can provide these services by global network or by networks of different type.For example, can provide packet-switched data transfer services by the connection between terminal and the wireless lan (wlan) access point.On the other hand, can provide circuit switched service by the connection between terminal and the public land mobile network (PLMN).
For enterprise with use at home, the WLAN increased popularity that all just becoming.For example, a lot of companies are disposing that WLAN replaces corporate lan (corporate local areanetwork) or as the enhancing to it.In addition, a lot of enterprise of service industry, for example restaurant and hotel have disposed WLAN and come to provide visit to the Internet or other data networks to the client.Along with WLAN has become day by day more general, be designed to also increase in the quantity of deferring to the last application of carrying out of the station of WLAN (station).For example, the station of typically deferring to WLAN may be a characteristic with text message applications, e-mail applications, Internet-browser and stream content player, also has other application.The user can defer to the application that moves any amount on the station of WLAN simultaneously.
In WLAN, often require responder station that the reception of the data that receive from initiator's station is confirmed.Affirmation (ACK) signal that sends to initiator's station from responder station provides this responder station correctly to receive the affirmation of the data that are sent out to initiator's station.In deferring to the equipment of WLAN, produce ACK at media interviews controls (MAC) layer.This acknowledgment mechanism consumes valuable system bandwidth.People are desirably in the utilization that in the shared resource wireless network signaling is minimized and control Radio Resource especially, because wireless system resources is limited, and are subjected to system bandwidth limitations.
Various improvement have been developed to the affirmation mechanism in IEEE 802.11 networks.For example, piece (block) affirmation mechanism allows generation that response side will confirm and transmission delay to receiving a plurality of frames.By this way, single acknowledgement frame can be delivered to the initiator from the recipient, confirm to receive several frames.But each frame that this embodiment requires to be confirmed in piece is confirmed all belongs to common data flow.That is, piece confirms that each frame of being confirmed must be a target with same application or processing entities.And conventional piece is confirmed fixed size, therefore regardless of the quantity of the frame that is being identified, always consumes the acknowledgement frame of fixed amount.
Summary of the invention
The system and method for the affirmation mechanism that is provided for improving in the shared resource network will be useful.(high-throughput, HT) to ask the affirmation (ACK) of the data of a plurality of data flow also will be useful to piece ACK request signal to utilize single high-throughput.In shared resource network, be provided for confirming that by HT piece ACK the affirmation mechanism of the reception of a plurality of frames also will be useful.Provide that to utilize single confirmation signal to assist the affirmation mechanism of confirmation of receipt of the frame of a plurality of data flow also will be useful.It also will be useful that the affirmation mechanism of confirmation of receipt of frame of variable number of the data flow of auxiliary variable number is provided.
Embodiments of the invention provide the system and method that is used for producing at shared resource system variable length acknowledgements, and described variable length acknowledgements for example is variable-length HT piece ACK.A plurality of frames are received, and produce the receiving status information of described a plurality of frames.Generation comprises the acknowledgement frame of described receiving status information.The length of described receiving status information depends on the quantity of described a plurality of frames.
Description of drawings
According to following detailed, the solution of the present invention is understood best when read in conjunction with the accompanying drawings.
Fig. 1 is the simplified block diagram of exemplary network environment;
Fig. 2 is the diagrammatic representation of the embodiment of service quality piece acknowledgement frame;
Fig. 3 is the figure of the embodiment of piece acknowledgement frame;
Fig. 4 A is the figure that comprises the acknowledgement frame embodiment that confirms the bitmap lengths data;
Fig. 4 B is the figure of embodiment of task identifier (traffic identifier) control field of acknowledgement frame shown in Fig. 5 A;
Fig. 4 C is the figure that the piece of acknowledgement frame shown in Fig. 5 A is confirmed the embodiment of homing sequence control field and piece affirmation bitmap field;
Fig. 5 A is the figure that comprises the embodiment of the variable length acknowledgement frames of confirming the bitmap lengths data;
Fig. 5 B is the figure that confirms another embodiment of control field with reference to the piece of the variable length acknowledgement frames of figure 5A description;
Fig. 6 confirms that with implicit expression the bitmap lengths signaling is the figure of embodiment of the variable length acknowledgement frames of feature;
Fig. 7 is the figure that piece is confirmed the exemplary format of claim frame;
Fig. 8 is the diagrammatic representation that piece is confirmed another exemplary format of claim frame;
Fig. 9 is the figure of embodiment of variable length acknowledgement frames of the affirmation of auxiliary MSDU and/or MPDU;
Figure 10 is the figure of embodiment of variable length acknowledgement frames that is used to provide the accepting state of MSDU, and described accepting state can be applied to the affirmation frame format described with reference to figure 9.
Figure 11 is the figure of embodiment of variable length acknowledgement frames that is used for the affirmation of the MSDU of variable number and MPDU;
Figure 12 is the figure of embodiment that confirms to be controlled to be the acknowledgement frame of feature with hybrid block; With
Figure 13 is frame sequence that exchanges between initiator and responder station and the figure that confirms the embodiment of sequence.
Embodiment
Should be appreciated that following disclosing provides a lot of different embodiment or example, be used to implement the different feature of each embodiment.For the disclosure is simplified, the object lesson of parts or arrangement is described below.Certainly, these only are examples, are not to be intended to restriction.In addition, the disclosure may repeat reference numerals and/or letter in each example.This repetition is for simple and purpose clearly, itself do not stipulate each embodiment that discussed and/or the relation between the configuration.
Fig. 1 is the simplified block diagram of demonstration network 100 environment.Network 100 is examples of shared resource network.For example, network 100 may be implemented as the wireless lan (wlan) that meets IEEE 802.11 standards.Especially, can implement network 100 according to IEEE 802.11n wlan standard.
In this illustrative example, network 100 comprises two basic service sets (BSS) 1 and 2, although can comprise the BSS of any amount in the network 100. BSS 1 and 2 provides corresponding overlay area 10 and 11, in described overlay area, the WLAN station (STA) 20-23 can communicate with one another by wireless medium, perhaps with other external networks in communicate by letter or computing device communication, described external network and network 100 join.BSS 1 and 2 is distributed system (DS) 30 and can interconnects communicatedly.DS 30 realizes the mobile device support by the integrated necessary logical services that is provided for handling the address and shines upon to the destination with a plurality of BSS.The access point (AP) that provides the visit of DS 30 is provided each BSS.In illustrative example, BSS 1 and 2 has corresponding AP 40 and 41.The wireless network of any size of DS 30 that AP 40 and 41 provides and BSS 1 and 2 auxiliary establishings and complexity, and the set of DS 30 and BSS 1-2 is called as the expansion service group network jointly.Logic between the non-IEEE802.11LAN of network 100 and for example LAN 50 is integrated to be provided by inlet (portal) 60.Various other configurations of network 100 are possible.For example, overlay area 10 and 11 can be partly overlapping, perhaps can be in juxtaposition.And embodiments of the invention can be deployed among the WLAN that comprises single Independent B SS.
Among the STA 20-23 each all may be implemented as the data handling system that is suitable for communication in wireless networks accordingly, for example wireless laptop computers, personal digital assistant, cell phone, and perhaps other can carry out the equipment of data communication.STA can comprise: processing unit, for example general purpose microprocessor and/or application-specific integrated circuit (ASIC); For example random access memory, read-only memory or other are used to preserve the memory devices of the memory device of machine-readable data; The communication interface of wireless communication card for example; And various miscellaneous parts and ancillary equipment.
Can implement the solution of the present invention with software, hardware, firmware or its combination.The various elements of system can be embodied as computer program either alone or in combination, and described computer program visibly is included in the machine readable storage device, carry out for processing unit.Each step of embodiments of the invention can be carried out by carrying out the computer processor that visibly is included in the program on the computer-readable medium, so that carry out function by input being operated and produced output.For example, computer-readable medium can be the memory in the WLAN station, perhaps portable medium, and for example tight system dish, floppy disk or disk can be loaded on the computer so that specifically implemented the computer program of the solution of the present invention.Computer program is not limited to accordance with any particular embodiment, for example can be incorporated in operating system, application program, foreground or background process, driver or its combination in any, carries out on single computer processor or a plurality of computer processor.In addition, each step of embodiments of the invention can provide the data structure on the computer-readable medium that is produced, generates, receives or otherwise be implemented in memory for example.
Though provide description according to IEEE 802.11 agreements, function and term here to shared resource network, the equipment of working therein and the wireless medium transmissions of in shared resource network, carrying out, but these examples are illustrative, and embodiment of the present invention are not limited to any particular network, defer to equipment or the network communication format or the agreement of network.And the description of this invention that relates to the embodiment in the network that meets IEEE 802 that provides here is illustrative, and just is provided for auxiliary the understanding of the present invention.Can realize implementing embodiments of the invention on the network architecture of data communication and the equipment at other the shared resource that utilizes.
Fig. 2 is the diagrammatic representation that the service quality piece is confirmed the embodiment of (ACK) frame 200.200 representatives of piece ACK frame meet the piece acknowledgement frame of IEEE 802.11e standard.Piece ACK frame 200 utilizes a signaling message frame acknowledgment to be provided for the frame of a task identifier (TID).Piece ACK frame 200 comprises frame control field 202, duration field 204, recipient's address field 206, sender address field 208, piece ACK control field 210, piece ACK homing sequence control field 212, piece ACK bitmap field 214 and Frame Check Sequence (FCS) field 216.Frame control field 202 can comprise several son fields, and these subfield definitions are protocol version for example, and such as the frame type of data, management or control, whether frame is the destination with the compartment system, and other frame control datas.Duration field 204 can comprise the definition block acknowledgement frame or send the duration of associated identifiers of the station of described acknowledgement frame or the data of length.RA field 206 and TA field 208 comprise recipient address and sender address respectively, and the recipient address for example is the IEEE MAC Address of piece acknowledgement frame 200 station pointed, and sender address for example is the IEEE MAC Address that sends the station of piece acknowledgement frame 200.Piece ACK control field 210 can comprise the control data of the piece affirmation data that comprised in the frame 200.Piece ACK homing sequence control field 212 can comprise the sequence number that the piece that confirmation is included in frame 200 is confirmed first frame in the data.Piece ACK bitmap field 214 comprises bitmap, and described bitmap comprises the receiving status information of one or more frames of the TID that is associated with frame 200.The accepting state of frame is preferably by corresponding binary value representative in the bitmap, the value zero (0) of for example indicating value one (1) that frame successfully received and indication frame successfully not to be received.Bitmap in the B-ACK bitmap field comprises one or more sequence, and each all is associated with particular frame in the frame sequence.First of bitmap in the piece ACK bitmap field 214 provides the accepting state by the frame of the number of frames sign of appointment in piece ACK homing sequence control field 212.Each follow-up position all provides the accepting state of corresponding subsequent frame in this bitmap.FCS field 216 can comprise for example 32 cyclic redundancy codes.
Acknowledgement frame 200 is suitable for confirming a plurality of frames.But 200 of piece ACK frames can be applicable to a communication traffic streams by the TID sign.Business Stream is data (for example speech data and best endeavors data (best effort the data)) stream that is associated with certain specific business norms.And the piece of frame 200 confirms that bitmap is the length of fixing, for example 128 bytes.
Therefore, have such demand: the mechanism of the frame by being provided for confirming different TID to communication station strengthens piece ACK function, so that it can be applicable to a plurality of Business Streams.By this way, the communication station with a plurality of application can only use a piece ACK message but not require piece ACK at each TID.In addition, there is such demand: strengthen piece ACK frame so that the length of affirmation data can change according to the quantity of the frame of confirming thus.
The figure of the embodiment of exemplary block acknowledgement frame has been shown among Fig. 3.Piece acknowledgement frame 300 is used to confirm to receive a plurality of Business Streams, the i.e. frame of a plurality of TID.Piece acknowledgement frame 300 comprises a plurality of fields.In illustrative example, piece acknowledgement frame 300 comprises frame control field 302, duration field 304, RA field 306 and sender address (TA) field 308.Frame control field 302 can comprise several son fields, and these subfield definitions are protocol version for example, and such as the frame type of data, management or control, whether frame is the destination with the compartment system, and other frame control datas.Duration field 304 can comprise the definition block acknowledgement frame or send the duration of associated identifiers of the station of described acknowledgement frame or the data of length.RA field 306 and TA field 308 comprise recipient address and sender address respectively, and the recipient address for example is the IEEE MAC Address of piece acknowledgement frame 300 station pointed, and sender address for example is the IEEE MAC Address that sends the station of piece acknowledgement frame 300.Can obtain more detailed description referring to ieee standard 802.11,1999 to exemplary frame control field content and structure.
Can comprise optional TID count area 310, this field is specified the quantity of the TID of the frame with the 300 affirmation receptions of piece acknowledgement frame.In this illustrative example, piece acknowledgement frame 300 is confirmed the frame of n Business Stream.
In addition, piece acknowledgement frame 300 comprises one or more affirmation field groups 320a-320n, each described affirmation field groups respectively with n TID in one be associated.As mentioned here, field groups comprises for example frame identification information of one or more number of frames, and the receiving status information of one or more frames.The frame of a field groups and a TID be associated uniquely (perhaps and the frame that is not associated be associated) with TID.Each field groups 320a-320n all comprises the affirmation data that are associated uniquely with one of TID, and has the frame accepting state of being confirmed by ACK frame 300.In illustrative example, each field groups 320a-320n comprises 3 fields respectively.Specifically, each TID all has piece affirmation control field, piece affirmation homing sequence control field and the piece affirmation bitmap field that is associated.In this example, each among n TID is associated with one that comprises among the field groups 320a-320n of the affirmation data of the frame of the TID that is associated respectively.Preferably give piece acknowledgement frame 300 additional frame verification sequence 324.
In this example, the piece of certain specific fields group affirmation control field is carried the affirmation data TID associated therewith of this field groups.Piece confirms that the homing sequence control field can comprise two parts or son field---first frame that be identified or the sequence number of data cell, and optionally by the frame of described sequence number appointment or the fragment number of data cell.The piece ACK bitmap field of field groups comprises bitmap, and described bitmap comprises the receiving status information of one or more frames of the TID that is associated with this field groups.The accepting state of frame is preferably by corresponding binary value representative in the bitmap, the value zero (0) of for example indicating value one (1) that frame successfully received and indication frame successfully not to be received.Bitmap in the B-ACK bitmap field comprises one or more sequence, and each all is associated with certain particular frame in the sequence of one or more frames.First of the bitmap of specific fields group provides the accepting state by the frame of the number of frames sign of the B-ACK homing sequence control field of this field groups.Each follow-up position provides accepting state for the corresponding sequence frames that begins from first frame by the described sequence number sign the B-ACK homing sequence control field in this bitmap.
For example, consideration has defined the field groups 320a of the affirmation data of the frame with TID value " 1 " Business Stream (TID-1).In this example, piece confirms that control field 321a comprises TID value " 1 ", and piece affirmation homing sequence control field 322a comprises the sequence number of first frame in have task identifier one or more frames of Business Stream of " 1 ".Piece confirms that bitmap field 323a safeguards a bitmap, and this bitmap has one place value in the one or more frames that indicate whether to receive the Business Stream with TID value 1 respectively.For example, suppose that piece affirmation homing sequence control field 322a comprises sequence number " 4000 ", and the hypothesis piece confirms that bitmap field 323a comprises the bitmap of ten place values.Therefore, first of these 10 place values indicates whether to receive the have sequence number frame of TID-1 of " 4000 ".During this bitmap remains 9 each indicates whether to have received in the frame with corresponding sequence number " 4001 "-" 4009 " respectively.The residue field groups 320b-320n provide TID-2 accepting state to the frame of TID-n.Referring to the sequence number of submitting on July 21st, 2004 is that 10/895,657 common unsettled U.S. Patent application can obtain this affirmation mechanism more detailed description, by reference this application is contained in this.
Illustrate in the above and describe in the piece affirmation scheme also shown in Figure 3, piece confirms that bitmap is a fixed size.For example, in certain embodiments, each piece confirms that bitmap field 323a-323n comprises the field of 128 bytes.Therefore, each bitmap can be used to confirm an as many as 128*8 mac frame (MAC service data unit (MSDU), a plurality of MSDU or Medium Access Control (MAC) Protocol Data Unit (MPDU)).Therefore, the fixed size of piece acknowledgement frame 300 that each piece has been confirmed bitmap field consumes, and have nothing to do for it provides the frame of accepting state or the quantity of data cell with this bitmap.This embodiment has caused inefficient shared resource utilization, does not confirm that the capacity of field has still consumed valuable wireless medium capacity between the transmission period of piece acknowledgement frame 300 because be used to the piece of frame accepting state.
Therefore, people's expectation is provided for confirming the technology of the frame that a plurality of different business flow in having single variable-sized acknowledgement frame.Specifically, send acknowledgement frame in response to the different Medium Access Control (MAC) Protocol Data Units (MPDU) that in frame, exist.New piece affirmation scheme allows to confirm a plurality of frames, and holds the task identifier (TID) of each independent piece acknowledgement frame and any segmentation (fragmentation) of sequence control definition and definition in forward sequence control.In addition, also, for example never support traditional station of a plurality of Business Streams or the MPDU that equipment sends, the piece acknowledgement frame is provided for not having the traffic frame of any TID associated therewith.
Among the embodiment of Miao Shuing various field sizes has been described here.But it only is illustrative that these field size or length are described, and is that selected assisting understood the present invention.Do not depart from instruction of the present invention, can use other field size values yet.For example, the field with particular exemplary size described herein can be implemented with different field size, so that realize this field and for example boundary alignment on 4 bit boundarys, byte boundary, word boundary or long word border.Can realize this alignment by filling suitable field.In addition, the field structure that provides here only is illustrative, and does not depart from instruction of the present invention, can carry out various rearranging to the order of data field.One of skill in the art will recognize that and to implement many other variations.
Fig. 4 A is the figure that comprises the embodiment of the variable-length ACK frame 400 of confirming the bitmap lengths data.In illustrative example, ACK frame 400 can comprise frame control field 402, duration field 404, TA field 406, RA field 408, piece affirmation control field 410 and optional TID control field 412.In illustrative example, piece confirms that control field 410 can comprise 16 (B0-B15 position) fields, and this 16 bit field comprises one 11n function (capable) field 410a and invalid/effective TID field 410b of one.The various data of carrying in the auxiliary proper interpretation ACK frame 400 of 11n function field, and provide whether frame 400 is the indication of deferring to the frame of 802.11n.In addition, agreement or standard version that 11n function field 410a can indicate ACK frame 400 to defer to, for example IEEE 802.11n.In this illustrative example, 11n function field 410a storage has indication and for example whether have the optionally position of the value of the specific fields of TID control field 412 and bitmap lengths field in ACK frame 400.For example, 11n function field place value " 1 " can be indicated and be supported frame TID, and the field and the physical block that therefore identify the TID control data confirm that the field of the respective length of bitmap is included in the ACK frame 400.In this example, invalid/effectively TID field 410b is set to invalid TID value, and perhaps, the STA that receives ACK frame 400 can ignore invalid/effective TID field 410b.The TID information of carrying in the TID control field 412 reads by receiving STA.On the other hand, that " 0 " among the 11n function field 410a can be indicated is invalid/effectively TID field 410b is set to effective TID value, then from eliminating TID control field 412 the ACK frame 400 (as the with dashed lines illustrative indicate).
Be asserted at field 410a under the situation of (assert), TID control field 412 is included in the ACK frame 400, and can comprise TID count area 412a and one or more field groups, each described field groups all comprises the example of the piece affirmation bitmap lengths field 412c of TID identifier field 412b and correspondence.In addition, can comprise optional MSDU/MPDU bit field 412d, this field indication ACK bitmap is being confirmed MSDU, MPDU or mac frame.TID count area 412a comprises having accepting state by the value identifiers of the quantity n of the TID of the frame of ACK frame 400 affirmations, and TID identifier field 412b transmits the TID value.For each TID that in ACK frame 400, has the frame accepting state, in TID control field 412, comprise the corresponding field group of TID identifier field 412b and piece affirmation bitmap lengths field 412c.For example, Fig. 4 B is the figure of embodiment of the TID control field 412 of ACK frame 400.As mentioned above, TID control field 412 comprises TID count area 412a, and field 412a provides having accepting state by the numbers illustrated of the TID quantity of the frame of ACK frame 400 signs.In illustrative example, TID count area 412a has value " n ", therefore specifies the frame of n TID to be confirmed by ACK frame 400.Therefore, in TID control field 412, comprise n group TID identifier field and corresponding piece affirmation bitmap lengths field.In illustrative example, TID identifier field and piece confirm that bitmap lengths field groups 420a-420n is included in the TID control field 412.Among the field groups 420a-420n each all with n TID in one be associated.For example, TID field 412b
1The value (" 1 ") that comprises sign specific T ID (TID-1).Piece is confirmed bitmap lengths field 412c
1Specified with at TID field 412b
1The piece that the TID-1 of middle sign is associated is confirmed the length of bitmap.In illustrative example, piece is confirmed bitmap lengths field 412c
1Specified the length value " L1 " of the bitmap that is associated with TID-1.This length value can for example be the length L 1 of unit specified bitmap with the byte.Similarly, the TID field of field groups 420b-420n and piece ACK bitmap lengths field identified respectively have the frame of being confirmed by ACK frame 400 n TID one of them TID and corresponding piece affirmation bitmap field length.
Return Fig. 4 A again, ACK frame 400 can comprise n field groups of piece ACK homing sequence control field 414 and piece ACK bitmap field 415.In n the field groups of described ACK homing sequence control field 414 and piece ACK bitmap field 415 each all uniquely with n TID with frame that accepting state confirmed by ACK frame 400 in one be associated.Piece ACK homing sequence control field has been specified the sequence number of first frame in the frame sequence, and the accepting state of described frame sequence is defined in the corresponding piece ACK bitmap field.The length of each piece ACK bitmap is preferably variable, and is provided with according to piece ACK bitmap lengths field corresponding in the TID control field 412.
With reference now to Fig. 4 C,, shows the figure of the embodiment of the piece ACK homing sequence control field of ACK frame 400 and piece ACK bitmap field.As shown in the figure, ACK frame 400 comprises field groups 430a-430n, the piece ACK bitmap field 415a-415n that each field groups all has corresponding piece ACK homing sequence control field 414a-414n and is associated.Each field groups 430a-430n is associated uniquely with one of n TID.In illustrative example, piece ACK homing sequence control data is marked as piece ACK homing sequence control-X, and piece ACK data bitmap is marked as piece ACK bitmap-X, and wherein X has indicated homing sequence control data and piece ACK data bitmap TID associated therewith.For example, the piece ACK data bitmap among homing sequence control data among the piece ACK homing sequence control field 414a and the piece ACK bitmap field 415a is associated with the TID that is " 1 ".Therefore, piece ACK homing sequence control field 414a has identified the sequence number of first frame of the TID-1 that has the accepting state data in the piece ACK bitmap of piece ACK bitmap field 415a.The other sequence frames (if any) of TID-1 has corresponding accepting state in order in piece ACK bitmap field 415a.The length of the bitmap among the piece ACK bitmap field 415a is specified by the piece ACK bitmap lengths field that is associated in the TID control field 412.In illustrative example, the length of the piece ACK bitmap among the piece ACK bitmap field 415a is by the piece ACK bitmap lengths field 412c in the TID control field 412
1(shown in Fig. 4 B) specifies.In a similar fashion, the bitmap block length field 412c that is associated with these bitmaps in TID value respectively of the length of the piece ACK bitmap among the piece ACK bitmap field 415b-415n by correspondence
2-412c
nThe middle appointment.Therefore, ACK frame 400 provides the frame format that is used to confirm a plurality of Business Streams.ACK frame 400 is the frame acknowledgment that the basis provides variable number with each TID.
With reference now to Fig. 5 A,, shows the figure of the embodiment that comprises the variable-length ACK frame 500 of confirming the bitmap lengths data.In illustrative example, ACK frame 500 can comprise frame control field 502, duration field 504, TA field 506, RA field 508 and piece affirmation control field 510.
In illustrative example, piece confirms that control field 510 comprises 16 (B0-B15 position) fields, and this 16 bit field can comprise 4 TID count area 510a, one 11n function field 510b and invalid/effective TID field 510c.Especially, ACK frame 500 does not comprise the TID control field.On the contrary, confirm that at piece appointment has accepting state by the quantity of the TID of the frame of ACK frame 500 signs in the control field 510, and the piece in the ACK frame 500 confirms that the length of bitmap is designated in optional second affirmation control field.In one embodiment, when 11n function word section is set up (for example value of being set to " 1 ") and has the accepting state data when being equaled 1 by the quantity of the TID of the frame of ACK frame 500 appointments, piece confirm control field 510 invalid/effectively TID field 510c is set to have accepting state by the effective value of the TID of the frame of ACK frame 500 signs.In this example, confirm that control field 512 is not included in (as with dashed lines is schematically indicated) in the ACK frame 500 for second.In this case, the length of piece ACK bitmap is variable, and ACK frame 500 does not need home block ACK bitmap lengths clearly.But the length that can deduct frame field (not comprising piece ACK bitmap field 515) by the total length from ACK frame 500 implicitly determines the length of piece ACK bitmap field 515.
In another embodiment, the quantity of the TID that is set up and identifies in TID count area 510a as 11n function field 510b is during greater than " 1 ", invalid/effectively TID field 510c is set to invalid TID value, perhaps, ignores invalid/effective TID field 510c.In this example, comprise that in ACK frame 500 second is confirmed control field 512, as shown in Fig. 5 A.In illustrative example, confirm that control field 512 comprises 4 reserved field 512a for second, and can comprise MSDU/MPDU bit field 512b that field 512b indication ACK bitmap is being confirmed MSDU, MPDU or mac frame as selecting.In addition, confirm that control field 512 can comprise piece and confirm bitmap lengths field 512c and TID identifier field 512d for second.This illustrative example shows second single instance of confirming control field 512, piece ACK homing sequence control field 514 and piece ACK bitmap field 515 with simplified illustration.But, a plurality of examples of these fields are included in respectively in the ACK frame 500, each all is associated with one of n TID, and second each example of confirming control field 512, piece ACK homing sequence control field 514 and piece ACK bitmap field 515 is corresponding to having by one of n TID of the frame accepting state of ACK frame 500 signs.Therefore, the example of second affirmation field 512 has been specified the respective length of the piece ACK bitmap of the TID that is associated.
510b is set to another value when the 11n function field, for example when " 0 ", then invalid/effectively TID field 510c is set to effective TID value, do not comprising in the ACK frame 500 that second is confirmed control field 512 (as with dashed lines is schematically indicated), and the length of piece ACK bitmap can be length variable.In this example, the frame of single TID is confirmed by variable-length block ACK bitmap field 515.
With reference now to Fig. 5 B,, shows the figure of another embodiment that certainly confirms control field 510 of variable-length ACK frame 500.Piece confirms that control field 510 can comprise 16 (B0-B15 position) fields, and this 16 bit field can comprise confirms position (B0) field 510d, control bit (B1) field 510e, reserved field 510f and TID count area 510g.Confirm that bit field 510d can be set to particular value (for example " 0 ") has been asked normal or non-delay with indication request frame 500 affirmation.That is, confirm that it is affirmations of non-delay that bit field 510d value " 0 " can be indicated frame 500.The affirmation bit field 510d of another value (for example " 1 ") can indicate frame 500 not make an immediate response to receive the confirmation request and produce.Control field 510e can be set to particular value (for example " 1 ") to be provided for explaining the mechanism of the acknowledgement frame 500 with the invalid/effective TID field 510c shown in Fig. 5 A.In this structure, for the control bit field 510d value of " 1 " can confirm that control field 510 comprises the sign of the quantity of TID in TID count area 510g by indicator collet.
Also can use and/or overlapping to 4C and Fig. 5 A to the ACK frame format shown in the 5B at Fig. 4 A with other frame formats with other frame formats.In addition, as following more fully illustrate and as described in, Fig. 4 A also can be applied to the frame format of the affirmation that is used for MSDU to the ACK frame format shown in the 5B to 4C and Fig. 5 A.
With reference now to Fig. 6,, shows with implicit expression and confirm that the bitmap lengths signaling is the figure of embodiment of the variable-length ACK frame 600 of feature.In this embodiment, ACK frame 600 comprises frame control field 602, duration field 604, TA field 606, RA field 608 and piece affirmation control field 610.In illustrative example, piece confirms that control field 610 comprises 16 (B0-B15 position) fields, and this 16 bit field comprises compressed bit field (MSDU/MPDU affirmation) 610a and TID identifier field 610b.In this embodiment, 600 supports of ACK frame are to the affirmation of the frame of the variable number of single TID.Piece confirms that homing sequence control field 612 has identified the sequence number of first frame of the single TID that is confirmed by ACK frame 600.By the total length of determining ACK frame 600 and the overhead byte that deducts ACK frame 600, can implicitly determine to be comprised in the length (perhaps in other embodiment, can being indicated clearly) that piece is confirmed the bitmap in the bitmap field 614.That is, determine to confirm the length of bitmap field 614 by the piece that control 612 of piece ACK homing sequence and FCS 616 define by the length that from the total length of ACK frame 600, deducts field 602 to 612 and FCS 616.In addition, the ACK frame format of describing in 5C and Fig. 6 at Fig. 5 A above also can be applied to the ACK frame format of Fig. 6.In another embodiment, as selection, compressed bit field 610a can be that unit comprises piece ACK bitmap lengths (for example, by being used for this purpose with 7 among the B0-B11) with the byte.
The embodiment of above-mentioned variable length acknowledgement frames has introduced and has confirmed 1 flexibility to 128*8 frame (MSDU or MPDU).As top pointing out, existing affirmation scheme has for example mechanism of the regular length ACK bitmap of 128 bytes affirmation bitmap for each TID provides.But, need to confirm that the probability of 128*8 MPDU is unlikely undoubtedly, and such situation is with rare.The length that comprises the ACK bitmap clear and definite or implicit expression has reduced the figure place that will send in ACK, therefore compare with other schemes described herein need be lower expense.Therefore, these frame formats have been brought the data throughout and the Internet resources more efficient use that increase.Previous embodiment has strengthened the ACK frame by the station transmission of the reception of confirming grouping.
With reference now to Fig. 7,, shows the figure of the exemplary format of piece ACK claim frame 700.Piece ACK claim frame 700 can be sent by the send station (originating station) of request from the affirmation that receives the station (receiving station), and the described reception station receives information block from the described station of sending.Piece ACK claim frame 700 comprises frame control field 702, duration field 704, TA field 706, RA field 708 and piece affirmation request (BAR) control field 710.In illustrative example, piece confirms that request control field 710 comprises 16 (B0-B15 position) fields, and this 16 bit field can comprise optional TID count area 710a (as with dashed lines is schematically indicated).Confirm to comprise in the request control field 710 11n function digit field 710b and invalid/effective TID field 710c at piece.
Produce under the situation of frame that ACK claim frame 700 is used to confirm single TID the person of sending, 11n function field 710b can be set up (for example being set to place value " 1 "), and invalid/the effective value of the TID that is associated with it of the TID field 710c frame that is set to be identified.In addition, optionally TID count area 710a can be set to " 1 ", so that indication ACK claim frame 700 is the requests that are used to confirm the frame of single Business Stream.When ACK claim frame 700 is used to ask to confirm the frame of single TID, preferably from getting rid of optional TID identifier field 712 (as with dashed lines is schematically indicated) the ACK claim frame 700.Can get rid of TID identifier field 712 under by invalid/situation that effectively TID field 710c provides in the sign of for example TID.Therefore, piece ACK homing sequence control 713 comprises the sequence number of start frame of one or more frames that will be identified of single TID.And, can confirm to use in request control field 710 and/or the field 712 extra position to indicate whether requested ACK bitmap is compress bitmap (being used to confirm MSDU or MPDU) at piece.Give the ACK claim frame 700 additional FCS 714.
Perhaps, the person of sending or the request station can be set to different values by 11n function field 710b, for example " 0 ".In this example, invalid/effectively TID field 710c is set to effective TID and irrelevant with the quantity of TID.
11n function digit field 710b be set to indicate the person of sending be defer under the situation of the station of IEEE802.11n and the quantity of TID greater than 1 situation under, optionally TID count area 710a can be configured to indicate the quantity n of the TID that is requested acknowledgement frame.Invalid/effectively TID field 710c is set to invalid TID value, perhaps, invalid/effectively TID field 710c can be left in the basket.The field groups that comprises TID identifier field 712 and piece ACK homing sequence control 713 at each TID.Illustrative example shows TID identifier field 712 and piece confirms that the single instance of homing sequence control field 713 is with simplified illustration.When ACK claim frame 700 is request for the affirmation of a plurality of TID frames, the a plurality of field groups that in ACK claim frame 700, comprise TID identifier field 712 and piece affirmation homing sequence control field 713, and each example of field groups is associated uniquely with one of n TID.And, can in TID identifier field 712, comprise a position, whether be compress bitmap (being used to confirm MSDU/MPDU) to indicate requested ACK bitmap.
With reference now to Fig. 8,, shows the figure of another exemplary format of piece ACK claim frame 800.Piece ACK claim frame 800 can be sent by the send station of request from the affirmation that receives the station, and the described reception station receives information block from the described station of sending.Piece ACK claim frame 800 comprises the MPDU head, and described MPDU head comprises frame control field 802, duration field 804, RA field 806 and TA field 808.In addition, claim frame 800 can comprise piece affirmation request (BAR) control field 810, one or more groups each TID information field 812 and relevant block associated therewith affirmation homing sequence control field 814, and FCS816.
Can realize BAR control field 810 with one of various configurations.For example, BAR control field 810 may be implemented as the configuration 850 of deferring to 802.11n or is implemented as the configuration 851 of not deferring to 802.11n.For example, if be configured to defer to the configuration of 802.11n, then BAR control field 810 can comprise 16 (B0-B15 position) fields, and this 16 bit field can comprise confirms position (B0) field 850a, 11n function digit (B1) field 850b, reserved field 850c and TID count area 850d.Confirm that bit field 850a can be set to particular value (for example " 0 ") has been asked normal or non-delay with indication request frame 800 affirmation.Promptly, can indicate frame 800 for the affirmation bit field 850a value of " 0 " is to send from the transmit leg that needs are confirmed immediately, and the recipient of claim frame 800 will be as quickly as possible, for example during suitable SIFS after, confirmation is turned back to the transmit leg of claim frame 800.The affirmation bit field 850a of another value (for example " 1 ") can indicate the recipient who does not require claim frame 800 receiving any immediate operation of claim frame 800 back execution.When the transmit leg of claim frame 800 does not require affirmation information immediately, clear and definite, confirm that bit field 850a can be set to " 1 ".In the configuration 850 of deferring to 802.11n, 11n function field 850b can be set to particular value (for example value of being set to " 1 "), is the requests of deferring to 802.11n with indication frame 800.The position B13-B15 of TID count area 850d is set to identify the value of the quantity n of the TID that is requested confirmation.In this configuration, claim frame 800 will comprise that n organizes each TID information field 812 and BA homing sequence control field 814, and each is organized corresponding to one of n TID.
Can in the configuration 851 of not deferring to 802.11n, realize BAR control field 810.For example, if be configured in the configuration of not deferring to 802.11n, then BAR control field 810 can comprise 16 (B0-B15 position) fields, and this 16 bit field can comprise confirms position (B0) field 851a, 11n function digit (B1) field 851b, reserved field 851c and TID identifier field 851d.Confirm that bit field 851a can be set to particular value (for example " 0 ") and ask the affirmation of normal or non-delay with indication request frame 800, and another value (for example " 1 ") can indicate the recipient who does not require claim frame 800 to carry out any operation immediately after receiving claim frame 800.In the configuration 851 of not deferring to 802.11n, it is not the request of deferring to 802.11n with indication frame 800 that 11n function field 851b can be set to particular value (for example value of being set to " 0 "), and for example, claim frame 800 can be interpreted as the 802.11e claim frame.The position B12-B15 of TID identifier field 851d is set to be requested the TID value of confirmation.In this configuration, claim frame 800 will comprise each the TID information field 812 and the BA homing sequence control field 814 of single group, and each is all corresponding to the TID identifier among the TID identifier field 851d.
Each pid information field (per TID information field) 812 can comprise reserved field 812a (B0-B10 position), MPDU/MSDU position (B11) field 812b and TID identifier field 812c (B12-B15 position).MPDU/MSDU bit field 812b can be set to particular value (for example " 0 ") and comprise request to the affirmation information of MPDU with indication frame 800, and can be set to another value (for example " 1 ") are requests to the affirmation information of MSDU with indication frame 800.TID identifier field 812c can specify to it value of confirming the TID of request is provided.In the example of the BA homing sequence control field 814 that the example with each TID information field 812 is associated, be appointed as homing sequence number of its request confirmation.Therefore, if asked confirmation for n TID, then n organizes each TID information field 812 and corresponding BA homing sequence control field 814 associated therewith is included in the claim frame 800.
With reference now to Fig. 9,, shows the figure of embodiment of ACK frame 900 of the affirmation of auxiliary MSDU and/or MPDU.ACK frame 900 comprises control field 902, duration 904, RA field 906, TA field 908 and hybrid block affirmation control field 910.In addition, ACK frame 900 comprises that piece confirms that homing sequence control field 912, piece confirm that MSDU bitmap field 914, piece confirm wrong MSDU bitmap field 916 and FCS 918.
In this embodiment, hybrid block confirms that control field 910 comprises various son fields.Specifically, hybrid block confirms that control field 910 comprises affirmation field 910a, number of significant digit field 910b, reserved field 910c and TID identifier field 910d.Confirm that field 910a is the field of single position, whether its sign has successfully received whole M SDU sequence.For example, confirm that place value " 1 " among the field 910a can confirm the reception of MSUD sequence, be worth " 0 " and then can indicate and also successfully do not receive complete MSDU sequence.The MSDU sequence is confirmed homing sequence control field 912 and number of significant digit field 910b definition by piece.Specifically, piece is confirmed the sequence number that homing sequence control field 912 has been specified first MSDU of MSDU sequence.Number of significant digit field 910b can be a fixed length bit field, 6 field for example, and have indicator collet and confirm that the piece that keeps in the MSDU bitmap field 914 confirms the value of the length of bitmap.For example, when the scope from 56 to 63 of the value of effective bit digital section 910b, piece confirms that the length (is unit with the eight bit byte) of MSDU bitmap field 914 is " 8 ".
In addition, piece is confirmed that MSDu bitmap field 914 provides and is used to indicate whether successfully received in the MSDU sequence all by the mechanism of the MPDU of segmentation.For example, Bm position (being that piece is confirmed the m position in the MSDU bitmap field 914) indicates whether successfully to receive in the MSDU all and comprised the MPDU that piece is confirmed the sequence number of the sequence number of appointment in the homing sequence control field 912 and m sum by having of segmentation.
In addition, piece is confirmed the interior wrong MPDU of MSDU of wrong MSDU field 916 misdirections.The length that piece is confirmed wrong MSDU field 916 by ACK frame 900 confirm the multiple of wrong MSDU.For example, if a MSDU comprises 16 MPDU, then piece confirms that the length of wrong MSDU field 916 is 16 (2 eight bit bytes).
With reference now to Figure 10,, shows the figure of embodiment of ACK frame 1000 of the accepting state of the MSDU that is used to provide ACK frame 900 forms of describing with reference to figure 9 above being applied to.ACK frame 1000 comprises control field 1002, duration field 1004, RA field 1006, TA field 1008 and hybrid block affirmation control field 1010.Hybrid block confirms that control field 1010 comprises various son fields.In illustrative example, hybrid block confirms that control field 1010 can comprise affirmation field 1010a, number of significant digit field 1010b, compression and reservation bit field 1010c and TID identifier field 1010d.In addition, ACK frame 1000 can comprise that piece confirms that homing sequence control field 1012, piece confirm that MSDU bitmap field 1014, piece confirm wrong MSDU bitmap field 1016 and FCS 1018.Compression and the compressed-bit that keeps among the bit field 1010c are optional.If in compression with keep among the bit field 1010c and comprise compressed-bit, then ACK frame 1000 provides the affirmation of MSDU but not to the affirmation of MSDU fragment.Therefore, if compressed-bit is comprised and is set up (for example the value of being set to ' 1 '), then piece confirms that the length of wrong MSDU field 1016 is 0 bytes, promptly confirms wrong MSDU bitmap field (as with dashed lines is schematically indicated) from getting rid of piece the ACK frame 1000.If compressed-bit is set to another value, for example place value ' 0 ', and then ACK frame 1000 comprises that piece confirms wrong MSDU field 1016.In this example, ACK frame 1000 provides as shown in Fig. 9 and the affirmation function of the ACK frame of describing 900.
With reference now to Figure 11,, shows the figure of embodiment of the variable-length ACK frame 1100 of the MSDU that is used to confirm variable number and MPDU.ACK frame 1100 can comprise frame control field 1102, duration field 1104, TA field 1106, RA field 1108 and piece affirmation control field 1110.Piece confirms that control field 1110 can comprise various son fields.Specifically, piece confirms that control field 1110 can comprise 16 (B0-B15 position) fields, and this 16 bit field can comprise 11n function field 1110a and invalid/effective TID field 1110b.In addition, ACK frame 1100 can comprise TID control field 1112, and TID control field 1112 comprises son field TID count area 1112a and hybrid block affirmation control field 1112b.Hybrid block confirms that control field 1112b can comprise son field affirmation bit field 1112b
1, number of significant digit field 1112b
2, reserved field 1112b
3With TID identifier field 1112b
4In addition, ACK frame 1100 can comprise n TID field groups, and each comprises the example that piece affirmation homing sequence field 1114, piece affirmation MSDU bitmap field 1116 and piece are confirmed wrong MSDU bitmap field 1118 respectively.Give the ACK frame 1100 additional FCS 1120.
When 11n function field 1110a is set up (for example value of being set to " 1 "), invalid/effectively TID field 1110b is set to invalid TID value (perhaps can ignore invalid/effective TID field 1110b).In this example, comprise hybrid block and confirm that the TID control field 1112 of control field is included in the ACK frame 1100.But when 11n function word segment value was set to another value (for example place value " 0 "), piece confirmed that these positions in the control field 1110 are interpreted as hybrid block and confirm the control field data.In this example, the 11n function digit comprises hybrid block and confirms in the reservation position in the control data one.
With reference now to Figure 12,, shows the figure of the embodiment of variable-length ACK frame 1200 with hybrid block affirmation control.ACK frame 1200 can comprise frame control field 1202, duration field 1204, TA field 1206, RA field 1208 and piece affirmation control field 1210.Piece confirms that control field 1210 can comprise various son fields.Specifically, piece confirms that control field 1210 can comprise 16 (B0-B15 position) fields, and this 16 bit field comprises TID count area 1210a, 11n function digit field 1210b and invalid/effective TID field 1210c.In addition, ACK frame 1200 comprises n TID field groups, and each all comprises the respective instance that hybrid block affirmation control field 1212, piece affirmation homing sequence control field 1214, piece affirmation MSDU bitmap field 1216 and piece are confirmed wrong MSDU bitmap field 1218.Hybrid block confirms that each example of control field 1212 comprises various son fields, comprises and confirms bit field 1212a, number of significant digit field 1212b, reservation bit field 1212c and TID identifier field 1212d.Give the ACK frame 1200 additional FCS 1220.
Each example of hybrid block affirmation control field 1212 indicates the piece of corresponding TID to confirm the length of MSDU bitmap field 1216.When 11n function field 1210b be set to a value (for example place value " 1 ") and by the quantity of the TID of TID count area 1210a indication more than or equal to 1 the time, then invalid/effectively TID field 1210c is set to invalid TID value (perhaps can ignore invalid/effective TID field 1210c).In this example, hybrid block confirms that control field 1212 is included in the frame structure shown in Figure 12.When 11n function field 1210b was set to another value (for example place value " 0 "), then piece confirmed that the position of control field 1210 is interpreted as hybrid block and confirms control data.In this case, the 11n function digit is that hybrid block is confirmed in the reservation position in the control field.
With reference now to Figure 13,, shows the figure of the embodiment of the frame sequence that between initiator and responder station, exchanges and affirmation.In illustrative example, for example the initiator of the WLAN station 20 shown in Fig. 1 frame sequence 1300 that will comprise a plurality of frame 1310a-1312c sends to for example responder station of the WLAN station 23 shown in Fig. 1.Frame 1310a-1312c representative comprises the frame of the Medium Access Control (MAC) Protocol Data Unit of various traffic streams, and being illustrated property ground is marked as MPDUx-Y, and wherein X indicates that Business Stream and Y indicate frame number.As mentioned here, the frame subclass comprises the subclass of frame sequence, and has one or more frames that belong to given traffic streams.Therefore, the frame subclass that three frame 1310a-1310c that comprise Business Stream " 1 " are shown is sent to responder station by initiator's station.Similarly, three frame 1311a-1311c of Business Stream " 2 " and " 3 " and the respective frame subclass of 1312a-1312c are shown and are sent to responder station by initiator's station.As selection, at the end at the data of each Business Stream, the initiator can send HT-piece-ACK and ask clear and definite HT-piece-ACK.
According to a preferred embodiment of the invention, in response to receiving frame sequence 1300, responder station sends variable-length ACK frame 1320, and as selection, ACK frame 1320 can comprise HT piece-ACK request.HT-ACK frame 1300 is suitable for confirming the frame (the perhaps frame that is not associated with TID) of one or more TID.As mentioned above, comprise that field length about the ACK frame 1320 of the affirmation information of the accepting state of frame sequence 1300 depends on the quantity of the frame of the frame sequence 1300 that is identified.Therefore, the length of ACK frame 1320 (by bit, byte isometry) is variable, and depends on the quantity of the frame that is identified.Therefore, the length L that consumes the duration of wireless medium resource as ACK frame 1320 depends on that wireless medium resource for example is one or more channels by the quantity of the frame of ACK frame 1320 affirmations.
Though illustrating, Figure 13 sends single ACK, be used to confirm a plurality of TID of being received by the station and a plurality of MPDU of each TID, but should be appreciated that, do not depart from spirit of the present invention, for the group of one or more MPDU of each TID, can send the ACK frame of variable-length; Perhaps, the group for one or more MPDU of different TID can send the ACK frame.As mentioned above, by the embodiments described herein, provide the mechanism that is used to produce variable length acknowledgement frames.Responder station receives a plurality of frames, and produces the receiving status information about described a plurality of frames thus.The acknowledgement frame that comprises receiving status information is produced.The length of receiving status information, thereby the total length of acknowledgement frame depend on the quantity of described a plurality of frames that responder station receives.
Though described embodiments of the invention in detail, it will be understood by those skilled in the art that and not depart from spirit and scope of the present disclosure that they can make various variations, replacement and change.Therefore, intention is included in all these variations, replacement and change in the scope of the present disclosure that limits as following claim.In the claims, the statement that device adds function is intended to cover the described structure of carrying out described function here, and not only structural equivalent, also has equivalent configurations.
Claims (38)
1. method that produces frame acknowledgement information comprises:
Receive a plurality of frames;
Generation is about the receiving status information of described a plurality of frames; With
Generation comprises the acknowledgement frame of described receiving status information, and wherein, the length of described receiving status information depends on the quantity of described a plurality of frames.
2. the step of a plurality of frames of the method for claim 1, wherein described reception comprises and receives a plurality of frame subclass, and one in each frame subclass and a plurality of task identifiers is associated.
3. method as claimed in claim 2, also comprise a plurality of field groups that produce described acknowledgement frame, each field groups respectively with described a plurality of task identifiers in one be associated, wherein, each field groups comprises the receiving status information of at least one sequence number and the frame of the task identifier that is associated, and wherein, the length of the receiving status information of field groups depend on the task identifier that is associated, have the quantity of the frame of the accepting state of in described acknowledgement frame, indicating.
4. method as claimed in claim 3, wherein, the described receiving status information in each field groups comprises piece respectively and confirms bitmap.
5. method as claimed in claim 3, wherein, described at least one sequence number that comprises in each field groups comprises the sequence number of first frame of the accepting state in described receiving status information task identifier, that have described field groups that is associated respectively.
6. method as claimed in claim 3 also is included in the described acknowledgement frame to each field groups produces corresponding length field, and described field is specified the length that is included in the described receiving status information in the described field groups.
7. the method for claim 1, wherein described a plurality of frames comprise a plurality of MAC service data units or Medium Access Control (MAC) Protocol Data Unit.
8. the method for claim 1 also is included in the length field that produces the described length of specifying described receiving status information in the described acknowledgement frame.
9. computer-readable medium with computer executable instructions of carrying out for computer system, described computer executable instructions is used to carry out a kind of method that produces frame acknowledgement information, and described computer executable instructions comprises:
Receive first instruction of a plurality of frames;
Generation is about second instruction of the receiving status information of described a plurality of frames; With
Generation comprises the 3rd instruction of the acknowledgement frame of described receiving status information, and wherein, the length of described receiving status information depends on the quantity of described a plurality of frames.
10. computer-readable medium as claimed in claim 9 wherein, comprises a plurality of frame subclass by described a plurality of frames of described first command reception, each frame subclass respectively with a plurality of task identifiers in one be associated.
11. computer-readable medium as claimed in claim 10, also be included in the 4th instruction that produces a plurality of field groups in the described acknowledgement frame, each field groups respectively with described a plurality of task identifiers in one be associated, wherein, each field groups comprises the receiving status information of at least one sequence number and the frame of the task identifier that is associated, and wherein, the length of the described receiving status information of field groups depends on the quantity of the frame of the task identifier that is associated.
12. computer-readable medium as claimed in claim 11, wherein, the described receiving status information in each field groups comprises piece respectively and confirms bitmap data structure.
13. computer-readable medium as claimed in claim 11, wherein, described at least one sequence number that comprises in each field groups comprises the sequence number of first frame of the accepting state in described receiving status information task identifier, that have described field groups that is associated respectively.
14. computer-readable medium as claimed in claim 11 also is included in the five fingers order that produces corresponding length field in the described acknowledgement frame for each field groups, described length field is specified the length that is included in the described receiving status information in the described field groups.
15. computer-readable medium as claimed in claim 9 also is included in the 4th instruction that produces the length field of the length of specifying described receiving status information in the described acknowledgement frame.
16. computer-readable medium as claimed in claim 9, wherein, described a plurality of frames comprise a plurality of MAC service data units or Medium Access Control (MAC) Protocol Data Unit.
17. an equipment that is suitable for executive communication in shared resource network comprises:
Be suitable for storing the memory of a plurality of frames; With
Processing unit is suitable for producing about the receiving status information of described a plurality of frames and produces the acknowledgement frame that comprises described receiving status information, and wherein, the length of described receiving status information depends on the quantity of described a plurality of frames.
18. equipment as claimed in claim 17, wherein, described a plurality of frames comprise a plurality of frame subclass, and one in each frame subclass and a plurality of task identifiers is associated.
19. equipment as claimed in claim 18, wherein, described processing unit produces a plurality of field groups in described acknowledgement frame, each field groups respectively with described a plurality of task identifiers in one be associated, wherein, each field groups comprises the receiving status information of at least one sequence number and the frame of the task identifier that is associated, and wherein, the length of the receiving status information of field groups depends on the quantity of the frame of the task identifier that is associated.
20. equipment as claimed in claim 19, wherein, the described receiving status information in each field groups comprises piece respectively and confirms bitmap.
21. equipment as claimed in claim 19, wherein, described at least one sequence number that comprises in each field groups comprises the sequence number of first frame of the accepting state in described receiving status information task identifier, that have described field groups that is associated respectively.
22. equipment as claimed in claim 17, wherein, described equipment comprises WLAN devices, and wherein, described acknowledgement frame comprises the media interviews control frame.
23. equipment as claimed in claim 17 also comprises the shared resource interface, wherein, described a plurality of frames are received by the described equipment on the described shared resource interface.
24. a method of asking confirmation comprises:
Generation is used to ask the affirmation claim frame of the receiving status information of a plurality of frames;
Specify a plurality of task identifiers in described affirmation claim frame, wherein, each in described a plurality of task identifiers is associated with in described a plurality of frames at least one; With
Described acknowledgement frame is addressed to recipient's station.
25. method as claimed in claim 24, wherein, described generation step also comprises the insertion control field, and it is at least one the request of accepting state in MAC service data unit or the Medium Access Control (MAC) Protocol Data Unit that described control field indicates described affirmation claim frame.
26. method as claimed in claim 24, wherein, described generation step also is included as each the appointment homing sequence control number in described a plurality of task identifier.
27. a memory of data that is used to store for the routine access of carrying out on the data handling system comprises:
Be stored in described data structure in memory, comprise the information of the reception that is used to verify a plurality of frames, described data structure comprises:
Field with sequence number of first frame in described a plurality of frame; With
About the affirmation information of described a plurality of frames, wherein, the length of described confirmation depends on the quantity of described a plurality of frames.
28. memory as claimed in claim 27, wherein, described confirmation comprises piece and confirms bitmap.
29. memory as claimed in claim 27, wherein, described data structure also comprises:
Second field with sequence number of second frame; With
About the affirmation information of second group of a plurality of frame comprising described second frame, wherein, depend on the quantity of described second group of a plurality of frame about the length of the described confirmation of described second group of a plurality of frame.
30. memory as claimed in claim 29, wherein, described first frame and described second frame are associated with first task identifier and second task identifier respectively.
31. the computer-readable medium with computer executable instructions of carrying out for computer system, described computer executable instructions are used to carry out a kind of method of confirming claim frame that produces, described computer executable instructions comprises:
Produce first instruction of first group of a plurality of field, each field has in a plurality of sequence numbers;
Produce second group of a plurality of field second the instruction, each field have with described a plurality of sequence numbers in a corresponding service identifier that is associated; With
Generate the 3rd instruction of described affirmation claim frame, described affirmation claim frame comprises described first group of a plurality of field and described second group of a plurality of field.
32. an equipment that is suitable for producing frame acknowledgement information comprises:
Be used to produce the device of the field of sequence number with first frame;
Be used to produce the device about the affirmation information of first group of a plurality of frame comprising described first frame, wherein, the length of described confirmation depends on the quantity of described first group of a plurality of frame; With
Be used to generate the device of the acknowledgement frame that comprises described field and described confirmation.
33. equipment as claimed in claim 32, wherein, be used to produce second confirmation of the described device generation of confirmation about second group of a plurality of frame, the length of described second confirmation depends on the quantity of described second group of a plurality of frame, and wherein, described first group of a plurality of frame and described second group of a plurality of frame are associated with first task identifier and second task identifier respectively, and wherein, described generating apparatus also is included in described second confirmation in the described acknowledgement frame.
34. an equipment that is suitable for producing frame acknowledgement information comprises:
Be used to receive the device of first group of a plurality of frame;
Be used to produce device about the receiving status information of described first group of a plurality of frame; With
Be used to generate the device of the acknowledgement frame that comprises described receiving status information, wherein, the length of described receiving status information depends on the quantity of described first group of a plurality of frame.
35. equipment as claimed in claim 34, wherein, described first group of a plurality of frame are associated with first task identifier, and wherein, the described device that is used to receive described a plurality of frames receives second group of a plurality of frame, and wherein, described generation device also produces the receiving status information about described second group of a plurality of frame, the length of described receiving status information depends on the quantity of described second group of a plurality of frame, and wherein, the described device that is used to generate described acknowledgement frame about the described receiving status information of described second group of a plurality of frame is included in the described acknowledgement frame.
36. a system that is used for transfer of data comprises:
The shared resource medium;
The transmit leg station that comprises the shared resource interface, wherein, the described transmit leg station produces a plurality of frames, and sends described a plurality of frames by described shared resource interface on described shared resource medium; With
The recipient's station that comprises the shared resource interface, described recipient's station receives described a plurality of frame, generation is about the receiving status information of described a plurality of frames, generation is addressed to the described transmit leg station and comprises the acknowledgement frame of described receiving status information, and on described shared resource medium, send described acknowledgement frame, wherein, the length of described receiving status information depends on the quantity of described a plurality of frames.
37. system as claimed in claim 36, wherein, described a plurality of frame comprises first framing that is associated with first task identifier and second framing that is associated with second task identifier, wherein, described receiving status information comprises first receiving status information of described first framing and second receiving status information of described second framing.
38. system as claimed in claim 37, wherein, described acknowledgement frame comprises described first task identifier that is associated with described first receiving status information and described second task identifier that is associated with described second receiving status information.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
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