CN103703829A - Method and device for data transmission - Google Patents

Method and device for data transmission Download PDF

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Publication number
CN103703829A
CN103703829A CN201280013108.3A CN201280013108A CN103703829A CN 103703829 A CN103703829 A CN 103703829A CN 201280013108 A CN201280013108 A CN 201280013108A CN 103703829 A CN103703829 A CN 103703829A
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frame
length
mpdu
information
delimiter
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CN103703829B (en
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鲍东山
阎德升
刘慎发
周玉宝
解晓强
姚惠娟
王竞
秦君华
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Beijing Nufront Wireless Tech Co ltd
Beijing Nufront Mobile Multimedia Technology Co Ltd
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Beijing Nufront Wireless Tech Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Communication Control (AREA)

Abstract

Provided in the present invention are a method and device for data transmission, comprising a method and device for transmitting/receiving data. The method for data transmission comprises: packaging a media access control protocol data unit (MPDU) as a subframe of a group media access control protocol data unit (G-MPDU); comprising: setting a delimiter before the MPDU, where the delimiter consists of a delimiter identifier and length parity information of the MPDU; packaging one or multiple subframes as the G-MPDU; and transmitting the G-MPDU.

Description

Method and device for data transmission
A kind of data transmission method and device
It it is on 2 7th, 2012 this application claims the applying date, a kind of Application No. 201210026596.3, entitled priority of the earlier application of data transmission method and device, the full content of the earlier application has embodied in this application.It it is on March 2nd, 2012 this application claims the applying date, a kind of Application No. 201210054095.6, entitled priority of the earlier application of data transmission method and device, the full content of the earlier application has embodied in this application.
Technical field
The invention belongs to wireless communication field, more particularly to a kind of data transmission method and device.
Background technology
In recent years, radio network technique have the WLAN WiFi technology based on 802.11 standards, based on 802.15 bluetooth Bluetooth systems and by GSM give birth to towards Femto technologies of indoor application etc..
WiFi technology based on IEEE 802.11 is current using a kind of most wide wireless network transmission technology.Wireless office i or net environment are mainly used in, application scenarios are in the majority with interior, can also be applied to outdoor environment.802.11 systems are evolved to 802.11a and 802.11g based on OFDM technologies by the initial 802.11b based on CDMA transmission mechanisms.Although in newest IEEE 802.11n-2009 standards, by introducing multiple antennas（MIMO) technology causes 802.11 η physical layer peak rates up to 600Mbps, but generally medium education（MAC, Media ACess Control) Annexation of layer tells only maximum and can reach 300Mbps.So for traditional wlan system, the MAC layer design of the single user access based on CSMA/CA (carrier sense/conflict avoidance) is always the bottleneck of network performance.So, it is difficult the multimedia service demand for adapting to the current and following high-speed developed rapidly again although existing Wi-Fi technology has provided the user cheap user mode access to a certain extent.Femto technologies based on 3GPP standards be from GSM evolution come a kind of new technology towards in-door covering, Femto technologies based on 3G systems use CDMA transmission mechanisms, and the Femto technologies towards LTE or WiMAX system then use OFDM transmission mechanism.Its multiple access access mechanism passage time, frequency, code word distribute mutually orthogonal access-in resource for different users, and this is different from there is essence towards the CSMA/CA random multi-access channels striven unexpectedly.But Femto technologies are raw by the 3G/LTE/WiMAX systems ^ " towards GSM.Due to 3G/LTE/WiMAX systems be mainly directed towards wide area covering mobile communication scene, its system features for short-distance and medium-distance radio communication scene not Optimization.Simultaneously based on more complicated 3G/LTE/WiMAX upper-layer protocol design and PHY layer to synchronous etc. strict demand, equipment cost is caused to accomplish the cheap of picture 802.11, this is also one of major reason that Femto technologies are not widely used always at present.In face of the multimedia service application demand increasingly developed rapidly, in order to preferably meet wireless communication needs, it is necessary to propose the implementation being more applicable.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of data transmission method and device, can efficiently and reliably realize data transfer.In order to solve the above-mentioned technical problem, the present invention proposes a kind of data transmission method for uplink, including：Media access control protocol data unit MPDU is encapsulated as a group media access control protocol data unit G-MPDU subframe, including：Delimiter is set before the MPDU, and the delimiter is identified by delimiter and the length check information of the MPDU is constituted；
One or more described subframe is encapsulated as G-MPDU;
Send the G-MPDU.In order to solve the above-mentioned technical problem, the present invention also proposes a kind of data receiver method, including：Receive and parse through a group media access control protocol data unit G-MPDU;The G-MPDU includes one or more subframe, and each subframe includes delimiter and MPDU;The delimiter is identified by delimiter and the length check information of the MPDU is constituted；
By bits match delimiter mark；When matching correct with delimiter mark, the MPDU gone out according to delimiter mark location in present sub-frame;Length check information in delimiter does length check to the MPDU, if verified successfully, then it is assumed that delimiter identification is correct, starts parsing；If school Thrift fails, then it is assumed that delimiter recognizes mistake, continue to match the following bit for currently identifying the bit matched with delimiter with delimiter mark.In order to solve the above-mentioned technical problem, the present invention also proposes a kind of data sending device, including：Package module, for media access control protocol data unit MPDU to be encapsulated as into a group media access control protocol data unit G-MPDU subframe, including：Delimiter is set before the MPDU, and the delimiter is identified by delimiter and the length check information of the MPDU is constituted；And one or more described subframe is encapsulated as G-MPDU;Sending module, for sending the G-MPDU. In order to solve the above-mentioned technical problem, the present invention also proposes a kind of data sink, including：Parsing module is received, for receiving and parsing through a group media access control protocol data unit G-MPDU;The G-MPDU includes one or more subframe, and each subframe includes delimiter and MPDU;The delimiter is identified by delimiter and the length check information of the MPDU is constituted；Judge module, is connected with the reception parsing module, for being identified by bits match delimiter, when matching correct with delimiter mark, stops matching, sends location control instruction；After match control instruction is received, continue to match following bit with delimiter mark；
First processing module, is connected with the judge module and the reception parsing module, for receiving after location control instruction, according to current matching to the MPDU that goes out in present sub-frame of delimiter mark location;
Second processing module, it is connected with the reception parsing module, the judge module and first processing module, length check is done to the MPDU for the length check information in delimiter, if verified successfully, then think that delimiter identification is correct, start parsing；If verification failure, then it is assumed that delimiter recognizes mistake, the match control instruction is sent.A kind of data transmission method and device that the present invention is provided, can efficiently and reliably realize data transfer.
It is a kind of data transmission method for uplink flow chart of the embodiment of the present invention to illustrate Fig. 1；
Fig. 2 is a kind of G-MPDU structural representations of the embodiment of the present invention；
Fig. 3 is G-MPDU of embodiment of the present invention subframe structure schematic diagram；Fig. 4 is G-MPDU of embodiment of the present invention delimiter structural representation；
Fig. 5 is that the embodiment of the present invention calculates the method flow schematic diagram that MPDU removes FCS residue length；
Fig. 6 is the first frame head structural representation of the embodiment of the present invention；Fig. 7 is the frame control field structural representation in the first frame head of the embodiment of the present invention；Fig. 8 is that the embodiment of the present invention calculates the method flow schematic diagram that GroupAck removes FCS residue length；
Fig. 9 is GroupAck structural representations of the embodiment of the present invention；Figure 10 is that the embodiment of the present invention calculates the method flow that GroupAck removes FCS residue length Schematic diagram；Figure 11 is the structural representation of independent resource claim frame of the embodiment of the present invention；
Figure 12 is a kind of data receiver method schematic flow sheet of the embodiment of the present invention；Figure 13 is a kind of data sending device block diagram of the embodiment of the present invention；
Figure 14 is a kind of data sink block diagram of the embodiment of the present invention.
Embodiment the following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to put into practice them.Other embodiments can include structure, logic, electric, process and other changes.Embodiment only represents possible change.Unless explicitly requested, otherwise single component and function are optional, and the order operated can change.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.The scope of embodiment of the present invention includes the gamut of claims, and claims all obtainable equivalents.Herein, these embodiments of the present invention individually or can be represented generally with term " invention ", it is convenient that this is used for the purpose of, and if in fact disclosing the invention more than one, the scope for being not meant to automatically limit the application is any single invention or inventive concept.The embodiments of the invention provide a kind of data transmission method for uplink, as shown in figure 1, including：
Step S 101：Media access control protocol data unit (MPDU) is encapsulated as to a group media access control protocol data unit (G-MPDU) subframe, including：Delimiter is set before the MPDU, and the delimiter is identified by delimiter and the length check information of the MPDU is constituted；
Step S102:One or more described subframe is encapsulated as G-MPDU;Step S103:Send the G-MPDU.
Wherein, the length check information in the delimiter is drawn by the MPDU residue lengths removed after Frame Check Sequence FCS.MPDU includes frame head, frame and FCS parts, and therefore, the residue length is also the frame head length and frame length sum of the MPDU.It is preferred that when MPDU to be encapsulated as to G-MPDU subframe, if not last subframe, also filler is set after the MPDU, to cause the length of the subframe to be the integral multiple of 2 bytes so that dissection process more cylinder list.
It is preferred that design of the embodiment of the present invention carries delimiter with 2 bytes, wherein：Delimiter mark is carried with 1 byte, with another byte loaded length check information, so as to need to only design the filler of 0 or 1 byte, expense has been saved, has improved treatment effeciency.
Referring to Fig. 2, the figure shows the G-MPDU structures encapsulated using the above method of the present invention, G-MPDU is made up of a series of G-MPDU subframes.Referring to Fig. 3, the figure shows the G-MPDU encapsulated using the above method of the present invention subframe structure, wherein：G-MPDU subframes include G-MPDU delimiters（Cylinder claims delimiter in subsequent descriptions；), MPDU and possible byte of padding.Except last G-MPDU subframe, each G-MPDU subframes need to increase by 0 or 1 byte of padding, and the length for making each G-MPDU subframes is the integral multiple of 2 bytes.Referring to Fig. 4, the figure shows the form of the G-MPDU encapsulated using the above method of the present invention delimiter, it is made up of delimiter mark and length check information (CRC).Wherein：Delimiter is designated a fixed value, such as 0x46.CRC is drawn by the MPDU residue lengths for removing FCS.It will be described below and how to calculate CRC:
Firstly, it is necessary to obtain the residue length that MPDU removes FCS, i.e. the length sum of frame head and frame, as shown in figure 5, including step：Step S501:The frame head of the MPDU is parsed, frame type information is obtained；Frame type information described in the embodiment of the present invention includes frame type and subtype.Wherein, frame type includes management control and data.The subtype is used to do further refinement to frame type.It for details, reference can be made to table 1.
The combination of the effective types of 1, and subtype
By the management control frame of above-mentioned various subtypes, it has been divided into sequence number management control frame and has managed control frame without sequence number, wherein：Having sequence number to manage control frame includes：BCF frames, CSI-MIMO frames, BFM-MIMO frames, CQI-FB frames.Include without sequence number management control frame：Random access request frame, accidental access response frame, terminal basic capability negotiating claim frame, terminal basic capability negotiating response frame, dynamic service sets up claim frame, dynamic service sets up response frame, dynamic service repaiies _ change claim frame, dynamic service repaiies _ change response frame, dynamic service removal request frame, dynamic service deletes response frame, independent resource claim frame, ACK frames, GroupAckReq frames, GroupAck frames, exit network frame, channel-switch-announcement frame, sleep request frame, dormancy response frame and downlink business indicate frame.Frame type and subtype and above-mentioned default type list according to being parsed from frame head match, you can know MPDU type.In other embodiments, frame type information can also use other dividing modes, the present invention not zhang limitation herein.
Step S502:Corresponding frame head length is determined according to the frame type information；According to the frame type information, you can orient the frame head form of the frame of corresponding types.2 kinds of frame heads are designed in the embodiment of the present invention：
The first is as shown in fig. 6, length is 6 bytes, including 16bit frame control field, 4bit burst field, 12bit sequence number field, 3bit reserved place, lbit burst indication field, 12bit length field.Wherein：
Frame control field is as shown in fig. 7, include fields：2bit protocol version, lbit frame type field, 5bit sub-type field, 4bit traffic identifier（FID) field, lbit retransmit field and 3bit reserved field.Another length is 2 bytes, only includes 16bit as shown in Figure 7 frame control field.It is data for frame type, uses the frame head form of 6 bytes.It is management control for frame type, if being ordered into row number management control frame, uses the frame head form of 6 bytes；If managing control frame without sequence number, then using the frame head form of 2 bytes.
In other embodiments, the frame head of other structures can be also designed, all applicable above method determines corresponding frame head length by frame type information.
Step S503:It is blunt to judge to determine corresponding frame length acquisition strategy, getting frame body length according to the frame type information； The present invention designs corresponding frame structure acquisition strategy according to different types of frame structure feature, specific as follows：
When the MPDU is that frame type is the frame of data, or when being ordered into row number management control frame, length field is provided with frame head, for load carrying frame body length configured information, therefore, by parsing frame head, therefrom getting frame body length configured information, obtains frame length；When the MPDU is no sequence number management control frame, if length is fixed, corresponding frame length can directly be determined according to frame type and subtype；When the MPDU is no sequence number management control frame, if length is not fixed, frame is parsed, then needs to calculate frame length, wherein：Computational methods 1:When carrying the configured information of elongated block of information total length in frame, parse the configured information of the elongated block of information total length, obtain the total length of elongated block of information in frame, the total length with fixed length block of information in the frame of the MPDU is summed again, calculates the frame length of the MPDU.
Computational methods 2:When carrying the quantity information of elongated block of information in frame, parse the quantity information of described information block, according to the unit length of the quantity information of described information block and described information block, calculate the total length of the elongated block of information, the total length with fixed length block of information in the frame of the MPDU is summed again, calculates the frame length of the MPDU.Step S504:Just residue length described in blunt frame head length and frame length computation according to the MPDU.
Illustrate that length is unfixed so that MPDU to be packaged is GroupAck frames as an example below and remove the residue length after FCS without how sequence number management control frame obtains MPDU.Step S801:Frame type and the subtype in MPDU frame head are parsed, it is GroupAck frames that the MPDU is determined according to this；Step S802:It is 2bit to determine the corresponding frame head length of GroupAck;
GroupAck is to manage control frame without sequence number, uses 2bit frame head.Step S803:Determining has length field, the total length for carrying all FID block of informations in the corresponding frames of GroupAck；
GroupAck frame format is as shown in Figure 9；
Step S804:The length field in GroupAck frame is parsed, the total length of all FID block of informations in GroupAck is obtained；Step S805:Calculate the reserved field in frame, manage the total length sum of control frame acknowledgement bit, length field and FID block of informations, obtain GroupAck frame length； Step S806:GroupAck frame head length and frame length sum is calculated, the residue length that GroupAck removes FCS is obtained.
Illustrate that length is unfixed so that MPDU to be packaged is independent resource claim frame as an example again below and remove the residue length after Frame Check Sequence FCS without how sequence number management control frame obtains MPDU.Step S1001:Frame type and the subtype in MPDU frame head are parsed, it is independent resource claim frame that the MPDU is determined according to this；Step S1002:It is 2bit to determine the corresponding frame head length of independent resource claim frame;
Independent resource claim frame is to manage control frame without sequence number, uses 2bit frame head.Step S1003:The field for not having in the corresponding frame of independent resource claim frame and being used for carrying frame length is determined, but there is FID digital section；
The frame format of independent resource claim frame is as shown in figure 11；Step S1004:Parse FID digital section in the frame of independent resource claim frame；
Independent resource claim frame why length it is variable be due to FID block of informations number it is variable, therefore, the total length of the FID block of informations of dynamically changeable can be calculated according to the unit length of FID numbers and FID block of informations, then is summed with the total length of fixed length block of information；
Step S1005:The total length of FID block of informations is calculated according to the unit length of the number of FID block of informations and FID block of informations；
Step S1006:Calculate the site identity in frame（STAID) field, Business Stream（FID) the total length sum of individual digital section and FID block of information, obtains the frame length of independent resource claim frame；
Step S1007:The frame head length and frame length sum of independent resource claim frame are calculated, the residue length that independent resource claim frame removes FCS is obtained.
MPDU is got to remove after the residue length after FCS, can be using 8 CRC checks.CRC can be produced using following standard polynomial：
G(x)= x8+ x2+x+l
Dwell vessel original state is 0xFF, and computing, which negates buffer status after terminating, is used as the output of CRC check sequence.CRC check bit is transmitted according to the byte order from high-order to low order.
Clean from the delimiter logo design cylinder in the above, the embodiment of the present invention, length information is obtained from MPDU, is set length field is dominant to represent not in delimiter, has been saved expense. Referring to Figure 12, the figure shows a kind of data receiver method of the embodiment of the present invention, for receiving the G-MPDU sent using the above method, including：Step S 1201:Receive and parse through G-MPDU;
Wherein, the G-MPDU includes being packaged with delimiter and MPDU in one or more subframe, each subframe;The delimiter is identified by delimiter and the length check information of the MPDU is constituted；Step S 1202:Bit initial position n=l to be matched is set；That is, since the 1st bit, identified by bits match delimiter；
Step S1203:N-th of bits match delimiter is identified, if matching is correct, step S1204 is performed;Otherwise, step S1205 is performed;
Step S1205:N=n+l, return to step S1203 are set;Step S1204:The MPDU gone out according to delimiter mark location in present sub-frame, performs step S1206;Step S 1206:Length check information in delimiter does length check to the MPDU, if school Thrift successes, perform step S1207;If school Thrift fails, return to step S 1205;Step S1207:Think that delimiter identification is correct, start parsing.After delimiter identification is correct, using the delimiter as first delimiter, the blunt MPDU according in present sub-frame in G-MPDU of ability total length (frame head length, frame length and FCS length sums；), you can the position of next subframe is determined, by that analogy, the position of follow-up each subframe can be oriented.Therefore, for a G-MPDU, after determining that delimiter identification is correct first, you can according to the corresponding relation of length, the position of each subframe is oriented successively, without being positioned to each subframe by delimiter matching.
When performing step S1205, it is to be verified by removing the residue length after FCS to the MPDU, check results is compared with the length check information in delimiter, if identical, then it is assumed that verify successfully；If it is not the same, then thinking verification failure.The process of the residue length is obtained with the method for obtaining residue length when length check information CRC is calculated in G-MPDU encapsulation process.Preferably, when MPDU to be encapsulated as to G-MPDU subframe, if not last subframe, filler also is set after the MPDU, to cause the length of the subframe to be the integral multiple of 2 bytes, for receiving terminal, parsing difficulty will be reduced well, improve resolution speed.It is preferred that design carries delimiter with 2 bytes, wherein：Delimiter mark is carried with 1 byte, with another byte loaded length check information, so as to need to only design the filler of 0 or 1 byte, expense has been saved, has improved the efficiency of overall data transmission and processing.Using data transmission method of the present invention, receiving terminal is after delimiter mark is matched, also further to MPDU length checks, to verify that delimiter identifies whether that identification is correct, so that erroneous judgement rate is effectively reduced, Improve the accuracy of data receiver.All MPDU transmitted in service transmission channel are transmitted using G-MPDU modes, and data transfer will be caused more efficiently and reliable.
To realize above-mentioned data transmission method for uplink, the embodiment of the present invention additionally provides a kind of data sending device, as shown in figure 13, including：Package module 1301, for media access control protocol data unit MPDU to be encapsulated as into a group media access control protocol data unit G-MPDU subframe, including：Delimiter is set before the MPDU, and the delimiter is identified by delimiter and the length school ^ Thrift information of the MPDU is constituted；And one or more described subframe is encapsulated as G-MPDU;Sending module 1302, for sending the G-MPDU.
It is preferred that also including：First processing module 1303, is connected with the package module 1301, and the calculating of the residue length after the Frame Check Sequence FCS length check information is removed according to the MPDU for just blunt.It is preferred that also including：
Parsing module 1304, the frame head for parsing the MPDU, obtains frame type information；Second processing module 1305, is connected with the parsing module 1304, for determining corresponding frame head length according to the frame type information；3rd processing module 1306, is connected with the parsing module 1304, for determining corresponding frame length acquisition strategy, getting frame body length according to the frame type information；Fourth processing module 1307, is connected with the first processing module 1303, the processing module 1306 of Second processing module 1305 and the 3rd, calculates the frame head length and frame length sum of the MPDU, obtains the residue length.Its towel,
The frame type information includes frame type and subtype；
Frame type includes data and management is controlled；Subtype is used to further divide frame type；The management control frame of the various subtypes, has been divided into sequence number management control frame and has managed control frame without sequence number again.It is preferred that the Second processing module 1305, determines that the MPDU is that frame type is the frame of data according to the frame type information, or when being ordered into row number management control frame, it is the first length to determine corresponding frame head length；And just it is blunt according to the frame type information to determine the MPDU be that no sequence number manages control frame when, it is the second length to determine corresponding frame head length. It is preferred that first length is 6bit;Second length is 2bit.It is preferred that the 3rd processing module 1306, just blunt to determine that the MPDU is the frame that frame type is data according to the frame type information, or when being ordered into row number management control frame, frame head is parsed, therefrom getting frame body length configured information, obtains frame length；3rd processing module 1306, when to determine the MPDU be that no sequence number manages control frame according to the frame type information, if length is fixed, corresponding frame length is determined according to frame type and subtype；If length is not fixed, frame is parsed, frame length is calculated.
Preferably, 3rd processing module 1306, it is just blunt to determine that the MPDU is that length is unfixed without sequence number management control frame according to the frame type information, and when the configured information of elongated block of information total length is carried in frame, parse the configured information of the elongated block of information total length, the total length of elongated block of information in frame is obtained, then is summed with the total length of fixed length block of information in the frame of the MPDU, the frame length of the MPDU is calculated.
Preferably, 3rd processing module 1306, it is just blunt to determine that the MPDU is that length is unfixed without sequence number management control frame according to the frame type information, and when carrying the quantity information of elongated block of information in frame, parse the quantity information of described information block, according to the unit length of the quantity information of described information block and described information block, calculate the total length of the elongated block of information, the total length with fixed length block of information in the frame of the MPDU is summed again, calculates the frame length of the MPDU.
It is preferred that the package module 1301, when MPDU to be encapsulated as to G-MPDU subframe, if not last subframe, also sets filler after the MPDU, to cause the length of the subframe to be the integral multiple of 2 bytes.
It is preferred that the package module 1301, delimiter is carried with 2 bytes, wherein：Delimiter mark is carried with 1 byte, with another byte loaded length check information；The filler is carried with 0 or 1 byte.
In order to realize above-mentioned data receiver method, the embodiment of the present invention also provides a kind of data sink, shown in mouth Figure 14, including：Parsing module 1401 is received, for receiving and parsing through a group media access control protocol data unit G-MPDU;The G-MPDU includes one or more subframe, and each subframe includes delimiter and MPDU;The delimiter is identified by delimiter and the length check information of the MPDU is constituted；Judge module 1402, is connected with the reception parsing module 1401, for being identified by bits match delimiter, when matching correct with delimiter mark, stops matching, sends location control instruction；After match control instruction is received, continue to match following bit with delimiter mark；First processing module 1403, is connected with the judge module 1402 and the reception parsing module 1401, for receiving after the location control instructs, according to current matching to the MPDU that goes out in present sub-frame of delimiter mark location; Second processing module 1404, it is connected with the reception parsing module 1401, the judge module 1402 and first processing module 1403, for the length check information in delimiter to the MPDU zhangs of length school Thrift, if school Thrift successes, then think that delimiter identification is correct, start parsing；If school Thrift fails, then it is assumed that delimiter recognizes mistake, the match control instruction is sent.
It is preferred that the Second processing module 1404, is verified to the MPDU residue lengths removed after Frame Check Sequence FCS, check results are compared with the length check information in delimiter, if identical, then it is assumed that verify successfully；If it is not the same, then thinking verification failure.It is preferred that also including：
Parsing module 1405, the frame head for parsing the MPDU, obtains frame type information；3rd processing module 1406, is connected with the parsing module 1405, and corresponding frame head length is determined according to the frame type information for just blunt；Fourth processing module 1407, is connected with the parsing module 1405, and corresponding frame length acquisition strategy, getting frame body length are determined according to the frame type information for just blunt；
5th processing module 1408, is connected with the Second processing module 1404, the 3rd processing module 1406 and fourth processing module 1407, calculates the frame head length and frame length sum of the MPDU, obtains the residue length.Wherein, the parsing module 1405, is connected with the reception parsing module 1401 and the first processing module 1403, according to the matching result of the first processing module 1403, the data processing parsed to the reception parsing module 1401（This annexation not shown in figure；).It is preferred that the frame type information includes frame type and subtype；
Frame type includes data and management is controlled；Subtype is used to further divide frame type；The management control frame of the various subtypes, has been divided into sequence number management control frame and has managed control frame without sequence number again.It is preferred that the 3rd processing module 1406, just blunt to determine that the MPDU is that frame type is the frame of data according to the frame type information, or when being ordered into row number management control frame, it is the first length to determine corresponding frame head length；And just it is blunt according to the frame type information to determine the MPDU be that no sequence number manages control frame when, it is the second length to determine corresponding frame head length.
It is preferred that first length is 6bit;Second length is 2bit.
It is preferred that the fourth processing module 1407, just blunt to determine that the MPDU is the frame that frame type is data according to the frame type information, or when being ordered into row number management control frame, frame head is parsed, therefrom getting frame body length configured information, obtains frame length；The fourth processing module 1407, when to determine the MPDU be that no sequence number manages control frame according to the frame type information, if length is fixed, corresponding frame length is determined according to frame type and subtype；If length is not fixed, frame is parsed, frame length is calculated. Preferably, the fourth processing module 1407, it is just blunt to determine that the MPDU is that length is unfixed without sequence number management control frame according to the frame type information, and when the configured information of elongated block of information total length is carried in frame, parse the configured information of the elongated block of information total length, the total length of elongated block of information in frame is obtained, then is summed with the total length of fixed length block of information in the frame of the MPDU, the frame length of the MPDU is calculated.Preferably, the fourth processing module 1407, it is just blunt to determine that the MPDU is that length is unfixed without sequence number management control frame according to the frame type information, and when carrying the quantity information of elongated block of information in frame, parse the quantity information of described information block, according to the unit length of the quantity information of described information block and described information block, calculate the total length of the elongated block of information, the total length with fixed length block of information in the frame of the MPDU is summed again, calculates the frame length of the MPDU.
It is preferred that except last subframe in G-MPDU, filler is also included in remaining subframe, to cause the length of the subframe to be the integral multiple of 2 bytes.
It is preferred that the delimiter is carried with 2 bytes, wherein：Delimiter mark is carried with 1 byte, with another byte loaded length check information；The filler is carried with 0 or 1 byte.
It is just blunt according to the disclosed embodiment, those skilled in the art can be enabled to realize or using the present invention.To those skilled in the art, the various modifications of these embodiments are it will be apparent that and the general principles that define here can also be applied to other embodiment on the basis of the scope and spirit of the present invention are not departed from.Embodiment described above is only presently preferred embodiments of the present invention; it is not intended to limit the invention; within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection.

Claims (44)

  1. Claims
    1. a kind of data transmission method for uplink, it is characterised in that including：
    Media access control protocol data unit MPDU is encapsulated as a group media access control protocol data unit G-MPDU subframe, including：Delimiter is set before the MPDU, and the delimiter is identified by delimiter and the length check information of the MPDU is constituted；
    One or more described subframe is encapsulated as G-MPDU;
    Send the G-MPDU.
    2. the method as described in claim 1, it is characterised in that：The length check information is drawn by the MPDU residue lengths removed after Frame Check Sequence FCS.
    3. method as claimed in claim 2, it is characterised in that：The frame head of the MPDU is parsed, frame type information is obtained；Corresponding frame head length is determined according to the frame type information；Corresponding frame length acquisition strategy, getting frame body length are determined according to the frame type information；The frame head length and frame length sum of the MPDU is calculated, the residue length is obtained.
    4. method as claimed in claim 3, it is characterised in that：The frame type information includes frame type and subtype；
    Frame type includes data and management is controlled；Subtype is used to further divide frame type；By the management control frame of various subtypes, sequence number management control frame has been divided into it and has managed control frame without sequence number.
    5. method as claimed in claim 4, it is characterised in that：When the MPDU be frame type be data frame, or be ordered into row number management control frame when, corresponding frame head length be the first length；
    When the MPDU is no sequence number management control frame, corresponding frame head length is the second length.
    6. method as claimed in claim 5, it is characterised in that：First length is 6bit;
    Second length is 2bit.
    7. method as claimed in claim 4, it is characterised in that：When the MPDU be frame type be data frame, or be ordered into row number management control frame when, solution Frame head is analysed, therefrom getting frame body length configured information, obtains frame length;
    When the MPDU is no sequence number management control frame, if length is fixed, corresponding frame length is determined according to frame type and subtype；If length is not fixed, frame is parsed, frame length is calculated.
    8. method as claimed in claim 7, it is characterised in that when the MPDU, which is that length is unfixed, manages control frame without sequence number：When carrying the configured information of elongated block of information total length in frame, parse the configured information of the elongated block of information total length, obtain the total length of elongated block of information in frame, the total length with fixed length block of information in the frame of the MPDU is summed again, calculates the frame length of the MPDU.
    9. method as claimed in claim 7, it is characterised in that when the MPDU, which is that length is unfixed, manages control frame without sequence number：When carrying the quantity information of elongated block of information in frame, parse the quantity information of described information block, according to the unit length of the quantity information of described information block and described information block, calculate the total length of the elongated block of information, the total length with fixed length block of information in the frame of the MPDU is summed again, calculates the frame length of the MPDU.
    10. the method as described in claim 1, it is characterised in that：When MPDU to be encapsulated as to G-MPDU subframe, if not last subframe, filler also is set after the MPDU, to cause the length of the subframe to be the integral multiple of 2 bytes.
    11. method as claimed in claim 10, it is characterised in that：Delimiter is carried with 2 bytes, wherein：Delimiter mark is carried with 1 byte, with another byte loaded length check information；The filler is carried with 0 or 1 byte.
    12. a kind of data receiver method, it is characterised in that including：Receive and parse through a group media access control protocol data unit G-MPDU;The G-MPDU includes one or more subframe, and each subframe includes delimiter and MPDU;The delimiter is identified by delimiter and the length check information of the MPDU is constituted；
    By bits match delimiter mark；When matching correct with delimiter mark, the MPDU gone out according to delimiter mark location in present sub-frame;Length check information in delimiter does length check to the MPDU, if verified successfully, then it is assumed that delimiter identification is correct, starts parsing；If school Thrift fails, then it is assumed that delimiter recognizes mistake, continue to match the following bit for currently identifying the bit matched with delimiter with delimiter mark.
    13. method as claimed in claim 12, it is characterised in that：The MPDU residue lengths removed after Frame Check Sequence FCS are verified, check results compared with the length check information in delimiter, if identical, then it is assumed that verify successfully；If not phase Together, then it is assumed that school Thrift fails.
    14. method as claimed in claim 13, it is characterised in that:The frame head of the MPDU is parsed, frame type information is obtained；Corresponding frame head length is determined according to the frame type information；
    Corresponding frame structure is determined according to the frame type information, frame length is obtained or calculate according to this；The frame head length and frame length sum of the MPDU is calculated, the residue length is obtained.
    15. method as claimed in claim 14, it is characterised in that：The frame type information includes frame type and subtype；
    Frame type includes data and management is controlled；Subtype is used to further divide frame type；By the management control frame of various subtypes, sequence number management control frame has been divided into it and has managed control frame without sequence number.
    16. method as claimed in claim 15, it is characterised in that：When the MPDU be frame type be data frame, or be ordered into row number management control frame when, corresponding frame head length be the first length；
    When the MPDU is no sequence number management control frame, corresponding frame head length is the second length.
    17. method as claimed in claim 16, it is characterised in that：First length is 6bit;
    Second length is 2bit.
    18. method as claimed in claim 15, it is characterised in that：When the MPDU be frame type be data frame, or be ordered into row number management control frame when, parse frame head, therefrom getting frame body length configured information, obtains frame length；
    When the MPDU is no sequence number management control frame, if length is fixed, corresponding frame length is determined according to frame type and subtype；If length is not fixed, frame is parsed, frame length is calculated.
    19. method as claimed in claim 18, it is characterised in that when the MPDU, which is that length is unfixed, manages control frame without sequence number：When carrying the configured information of elongated block of information total length in frame, parse the configured information of the elongated block of information total length, obtain the total length of elongated block of information in frame, the total length with fixed length block of information in the frame of the MPDU is summed again, calculates the frame length of the MPDU.
    20. method as claimed in claim 18, it is characterised in that when the MPDU, which is that length is unfixed, manages control frame without sequence number：When carrying the quantity information of elongated block of information in frame, the quantity information of described information block is parsed, According to the unit length of the quantity information of described information block and described information block, the total length of the elongated block of information is calculated, then is summed with the total length of fixed length block of information in the frame of the MPDU, the frame length of the MPDU is calculated.
    21. method as claimed in claim 12, it is characterised in that：
    Except last subframe in G-MPDU, filler is also included in remaining subframe, to cause the length of the subframe to be the integral multiple of 2 bytes.
    22. method as claimed in claim 21, it is characterised in that：The delimiter takes 2 bytes, wherein：The delimiter mark takes 1 byte, and the length check information takes another byte；Described filling 0 or 1 byte of bit occupancy.
    23. a kind of data sending device, it is characterised in that including：Package module, for media access control protocol data unit MPDU to be encapsulated as into a group media access control protocol data unit G-MPDU subframe, including：Delimiter is set before the MPDU, and the delimiter is identified by delimiter and the length check information of the MPDU is constituted；And one or more described subframe is encapsulated as G-MPDU;Sending module, for sending the G-MPDU.
    24. device as claimed in claim 23, it is characterised in that also include：First processing module, is connected with the package module, and the length check information is calculated for removing the residue length after Frame Check Sequence FCS according to the MPDU.
    25. device as claimed in claim 24, it is characterised in that also include：Parsing module, the frame head for parsing the MPDU, obtains frame type information；
    Second processing module, is connected with the parsing module, for determining corresponding frame head length according to the frame type information；
    3rd processing module, is connected with the parsing module, for determining corresponding frame length acquisition strategy, getting frame body length according to the frame type information；
    Fourth processing module, is connected with the first processing module, Second processing module and the 3rd processing module, calculates the frame head length and frame length sum of the MPDU, obtains the residue length.
    26. device as claimed in claim 25, it is characterised in that：The frame type information includes frame type and subtype；
    Frame type includes data and management is controlled；Subtype is used to further divide frame type；The management control frame of the various subtypes, has been divided into sequence number management control frame and has managed control frame without sequence number again.
    27. device as claimed in claim 26, it is characterised in that： The Second processing module, determines that the MPDU is that frame type is the frame of data according to the frame type information, or when being ordered into row number management control frame, it is the first length to determine corresponding frame head length；And just it is blunt according to the frame type information to determine the MPDU be that no sequence number manages control frame when, it is the second length to determine corresponding frame head length.
    28. device as claimed in claim 27, it is characterised in that：First length is 6bit;
    Second length is 2bit.
    29. device as claimed in claim 26, it is characterised in that：3rd processing module, determines that the MPDU is that frame type is the frame of data, or when being ordered into row number management control frame, parse frame head, therefrom getting frame body length configured information, obtains frame length according to the frame type information；
    3rd processing module, when to determine the MPDU be that no sequence number manages control frame according to the frame type information, if length is fixed, corresponding frame length is determined according to frame type and subtype；If length is not fixed, frame is parsed, frame length is calculated.
    30. device as claimed in claim 29, it is characterised in that：3rd processing module, it is just blunt to determine that the MPDU is that length is unfixed without sequence number management control frame according to the frame type information, and when the configured information of elongated block of information total length is carried in frame, parse the configured information of the elongated block of information total length, obtain the total length of elongated block of information in frame, the total length with fixed length block of information in the frame of the MPDU is summed again, calculates the frame length of the MPDU.
    31. device as claimed in claim 29, it is characterised in that：3rd processing module, it is just blunt to determine that the MPDU is that length is unfixed without sequence number management control frame according to the frame type information, and when carrying the quantity information of elongated block of information in frame, parse the quantity information of described information block, according to the unit length of the quantity information of described information block and described information block, calculate the total length of the elongated block of information, the total length with fixed length block of information in the frame of the MPDU is summed again, calculates the frame length of the MPDU.
    32. device as claimed in claim 23, it is characterised in that：The package module, when MPDU to be encapsulated as to G-MPDU subframe, if not last subframe, also sets filler after the MPDU, to cause the length of the subframe to be the integral multiple of 2 bytes.
    33. device as claimed in claim 32, it is characterised in that：The package module, delimiter is carried with 2 bytes, wherein：Delimiter mark is carried with 1 byte, with another byte loaded length check information；The filler is carried with 0 or 1 byte.
    34. a kind of data sink, it is characterised in that including：Parsing module is received, for receiving and parsing through a group media access control protocol data unit G-MPDU;The G-MPDU include one or more subframe, each subframe include delimiter with MPDU;The delimiter is identified by delimiter and the length check information of the MPDU is constituted；Judge module, is connected with the reception parsing module, for being identified by bits match delimiter, when matching correct with delimiter mark, stops matching, sends location control instruction；After match control instruction is received, continue to match following bit with delimiter mark；
    First processing module, is connected with the judge module and the reception parsing module, for receiving after location control instruction, according to current matching to the MPDU that goes out in present sub-frame of delimiter mark location;
    Second processing module, it is connected with the reception parsing module, the judge module and first processing module, length check is done to the MPDU for the length check information in delimiter, if verified successfully, then think that delimiter identification is correct, start parsing；If verification failure, then it is assumed that delimiter recognizes mistake, the match control instruction is sent.
    35. device as claimed in claim 34, it is characterised in that：
    The Second processing module, is verified to the MPDU residue lengths removed after Frame Check Sequence FCS, check results is compared with the length check information in delimiter, if identical, then it is assumed that verify successfully；If it is not the same, then thinking verification failure.
    36. device as claimed in claim 35, it is characterised in that also include：Parsing module, the frame head for parsing the MPDU, obtains frame type information；3rd processing module, is connected with the parsing module, for determining corresponding frame head length according to the frame type information；
    Fourth processing module, is connected with the parsing module, for determining corresponding frame length acquisition strategy, getting frame body length according to the frame type information；
    5th processing module, is connected with the Second processing module, the 3rd processing module and fourth processing module, calculates the frame head length and frame length sum of the MPDU, obtains the residue length.
    37. device as claimed in claim 36, it is characterised in that：The frame type information includes frame type and subtype；
    Frame type includes data and management is controlled；Subtype is used to further divide frame type；The management control frame of the various subtypes, has been divided into sequence number management control frame and has managed control frame without sequence number again.
    38. device as claimed in claim 37, it is characterised in that：3rd processing module, determines that the MPDU is that frame type is the frame of data according to the frame type information, or when being ordered into row number management control frame, it is the first length to determine corresponding frame head length；And just it is blunt according to the frame type information to determine the MPDU be that no sequence number manages control frame when, it is the second length to determine corresponding frame head length.
    39. device as claimed in claim 38, it is characterised in that： First length is 6bit;
    Second length is 2bit.
    40. device as claimed in claim 37, it is characterised in that:The fourth processing module, determines that the MPDU is that frame type is the frame of data, or when being ordered into row number management control frame, parse frame head, therefrom getting frame body length configured information, obtains frame length according to the frame type information；
    The fourth processing module, just it is blunt according to the frame type information to determine the MPDU be that no sequence number manages control frame when, if length is fixed, corresponding frame length is determined according to frame type and subtype；If length is not fixed, frame is parsed, frame length is calculated.
    41. device as claimed in claim 40, it is characterised in that：The fourth processing module, it is just blunt to determine that the MPDU is that length is unfixed without sequence number management control frame according to the frame type information, and when the configured information of elongated block of information total length is carried in frame, parse the configured information of the elongated block of information total length, obtain the total length of elongated block of information in frame, the total length with fixed length block of information in the frame of the MPDU is summed again, calculates the frame length of the MPDU.
    42. device as claimed in claim 40, it is characterised in that：The fourth processing module, it is just blunt to determine that the MPDU is that length is unfixed without sequence number management control frame according to the frame type information, and when carrying the quantity information of elongated block of information in frame, parse the quantity information of described information block, according to the unit length of the quantity information of described information block and described information block, calculate the total length of the elongated block of information, the total length with fixed length block of information in the frame of the MPDU is summed again, calculates the frame length of the MPDU.
    43. device as claimed in claim 34, it is characterised in that：
    Except last subframe in G-MPDU, filler is also included in remaining subframe, to cause the length of the subframe to be the integral multiple of 2 bytes.
    44. device as claimed in claim 43, it is characterised in that：The delimiter is carried with 2 bytes, wherein：Delimiter mark is carried with 1 byte, with another byte loaded length check information；The filler is carried with 0 or 1 byte.
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