CN105429737B - A kind of method and apparatus for frame acknowledgment - Google Patents

A kind of method and apparatus for frame acknowledgment Download PDF

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Publication number
CN105429737B
CN105429737B CN201510864249.1A CN201510864249A CN105429737B CN 105429737 B CN105429737 B CN 105429737B CN 201510864249 A CN201510864249 A CN 201510864249A CN 105429737 B CN105429737 B CN 105429737B
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China
Prior art keywords
frame
response
confirmation
immediately
access point
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CN105429737A (en
Inventor
鲍东山
刘慎发
于晓燕
解晓强
阎德升
杨之佐
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Beijing Nufront Mobile Multimedia Technology Co Ltd
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Beijing Nufront Mobile Multimedia Technology Co Ltd
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Priority to CN201510864249.1A priority Critical patent/CN105429737B/en
Priority claimed from CN201280013095.XA external-priority patent/CN103548316B/en
Publication of CN105429737A publication Critical patent/CN105429737A/en
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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026Transmission of channel quality indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607Details of the supervisory signal
    • H04L1/1621Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027Scheduling of signalling, e.g. occurrence thereof
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607Details of the supervisory signal
    • H04L1/1685Details of the supervisory signal the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1825Adaptation of specific ARQ protocol parameters according to transmission conditions
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1854Scheduling and prioritising arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/06Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0417Feedback systems

Abstract

The present invention provides a kind of method and apparatus for frame acknowledgment, this method comprises: the confirmation response of one or more frame is encapsulated as group acknowledge response;Send the group acknowledge response.This method can reduce the transfer resource of frame acknowledgment occupancy, effectively ensure data Successful transmissions.

Description

A kind of method and apparatus for frame acknowledgment
It is on March 23rd, 2012 that the application, which is the applying date, application No. is 201280013095.X, entitled one kind The division of the parent application of method and apparatus for frame acknowledgment.
Technical field
The invention belongs to wireless communication field more particularly to a kind of method and apparatus for frame acknowledgment.
Background technique
In recent years, radio network technique has WLAN WiFi technology based on 802.11 standards, based on 802.15 Bluetooth Bluetooth system and the Femto technology towards indoor application etc. being derived by mobile communication system.
WiFi technology based on IEEE 802.11 is to use a kind of most wide wireless network transmission technology now.Mainly answer For radio local network environment, application scenarios are in the majority with interior, can also be applied to outdoor environment.802.11 system is by initial 802.11b based on CDMA transmission mechanism is evolved to 802.11a and 802.11g based on OFDM technology.Although newest In IEEE 802.11n-2009 standard, make 802.11n physical layer peak rate can by introducing multiple antennas (MIMO) technology Up to 600Mbps, but the only maximum of handling up of usually media access control (MAC, Media Access Control) layer can reach To 300Mbps.So the single user based on CSMA/CA (carrier sense/conflict avoidance) accesses for traditional wlan system MAC layer design be always network performance bottleneck.So although existing Wi-Fi technology mentions to a certain extent for user Cheap user mode access has been supplied, but has been difficult to adapt to the multimedia of the high-speed of current and following rapid development again Business demand.
Femto technology based on 3GPP standard be from mobile communication system evolution come it is a kind of towards in-door covering New technology, the Femto technology based on 3G system use CDMA transmission mechanism, and the Femto technology towards LTE or WiMAX system is then Using OFDM transmission mechanism.Its multiple access access mechanism is distributed by time, frequency, code word for different users mutually orthogonal Access-in resource, this has essence different from the CSMA/CA random multi-access channel towards competition.But Femto technology by towards The 3G/LTE/WiMAX system of mobile communication system is derived.Since 3G/LTE/WiMAX system is mainly directed towards wide area covering Mobile communication scene, system features for short-distance and medium-distance wireless communication scene do not optimize.It is based on 3G/LTE/ simultaneously WiMAX more complicated upper-layer protocol design, to the synchronous strict demand waited, causes equipment cost that can not accomplish with PHY layer As 802.11 it is cheap, this is also the one of the major reasons that Femto technology is not widely used always at present.
Multimedia service application demand in face of increasingly developing rapidly needs to preferably meet wireless communication needs It is proposed more applicable implementation.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of method and apparatus for frame acknowledgment, to effectively ensure Data Successful transmissions.
The embodiment of the present invention provides a kind of method for frame acknowledgment, comprising:
The confirmation response of one or more frame is encapsulated as group acknowledge response, is specifically included:
The confirmation response of one or more frame on same Business Stream is encapsulated as Business Stream confirmation response;By one Or multiple Business Stream confirmation responses are encapsulated as group acknowledge response;
Encapsulate frame head, frame and the frame check information FCS of group acknowledge response;
One or more FID (Flow ID) Business Stream block of information, the FID Business Stream block of information are set in frame In include traffic stream identifier, serial number and bitmap bitmap, wherein the confirmation that the bitmap is used to carry continuous multiple frames is answered It answers, each in bitmap corresponds to the confirmation response of a frame, and the serial number is used to indicate first bit in the bitmap The serial number of the corresponding frame in position;
Send the group acknowledge response;
After receiving confirmation request immediately or confirmation instruction immediately, the group acknowledge response is returned immediately, it is specific to wrap It includes:
Each physical frame period successively includes downstream cycle and upward cycle, is received in the downlink physical period of this frame Immediately confirmation request or immediately confirmation instruction when, this frame the ascending physical signal period return group acknowledge response;In the upper of this frame When the row physics period receives confirmation request immediately or confirmation instruction immediately, in the downlink physical period return group of next frame Confirm response;
Central access point and website transmitting terminal and receiving end each other are sent and received one of in the following manner:
(1) if, central access point send and need the management control frame that confirms to website, central access point is being dispatched Resource is reserved when uplink transmission resource for corresponding acknowledgement frame;
(2) if, central access point transmission group Medium Access Control (MAC) Protocol Data Unit (G-MPDU) give website, and by being used to indicate The field instruction website of frame acknowledgment mode is confirmed that then central access point is corresponding in scheduling of upstream transmissions resource immediately Acknowledgement frame reserve resource;
(3) if, central access point send aggregate data frame to website, and the word by being used to indicate frame acknowledgment mode Section instruction allows website to postpone response, then website actively can return group acknowledge frame when uplink transmission resource has residue, Or group acknowledge frame is returned again after waiting the acknowledgement notification immediately for receiving central access point transmission;
(4) if, website send and need the management control frame that confirms to central access point, central access point should be The downlink physical period of next frame is confirmed;
(5) if, website transmission group Medium Access Control (MAC) Protocol Data Unit (G-MPDU) give central access point, and by being used to indicate The field Deictic Center access point of frame acknowledgment mode confirms that then central access point is sent out in the downlink physical period of next frame immediately Send acknowledgement frame;
(6) if, website send aggregate data frame to central access point, and the word by being used to indicate frame acknowledgment mode Section instruction allows central access point to postpone response, then central access point is when downlink transfer resource has residue actively by group acknowledge Frame passback, or group acknowledge frame is returned again after waiting the acknowledgement notification immediately for receiving website transmission.
Return to the confirmation response of the designated frame in specified data flow immediately according to the confirmation request immediately.
Wherein, the frame head of the frame is parsed, confirmation instruction immediately is therefrom obtained.
The embodiment of the invention also includes a kind of devices for frame acknowledgment, comprising:
Package module, for the confirmation response of one or more frame to be encapsulated as group acknowledge response;
Sending module, for sending the group acknowledge response;
Wherein, the package module, for the confirmation response of one or more frame on same Business Stream to be encapsulated as Business Stream confirms response;One or more described Business Stream confirmation response is encapsulated as group acknowledge response;
Wherein, the package module, for encapsulating the frame head, frame and FCS of group acknowledge response: one being arranged in frame A or multiple FID Business Stream block of informations, the Business Stream confirm to include traffic stream identifier, serial number and bitmap in response Bitmap, wherein the bitmap is used to carry the confirmation response of continuous multiple frames, each in bitmap corresponds to one The confirmation response of frame, the serial number are used to indicate the serial number of the corresponding frame of first bit in the bitmap;
Control module for receiving confirmation request immediately or immediately confirmation instruction, and controls the package module accordingly Group acknowledge response is encapsulated, and the control sending module sends packaged group acknowledge response immediately;
Each physical frame period successively includes downstream cycle and upward cycle, is received from the downlink physical period of this frame When to the confirmation request immediately, the control module controls the sending module and sends envelope in the ascending physical signal period of this frame The group acknowledge response installed;When from the confirmation request immediately is received in the ascending physical signal period of this frame, the transmission is controlled Module sends packaged group acknowledge response in the downlink physical period of next frame;
Preferably, the confirmation request immediately carries in the mark and each Business Stream of one or more Business Stream The mark of one or more frame;
The control module controls the package module for the finger in specified data flow according to the confirmation request immediately The confirmation response of framing is encapsulated as group acknowledge response.
Preferably, the control module obtains the confirmation instruction immediately by parsing the frame head of data frame.
A kind of method and apparatus for frame acknowledgment provided by the invention, can be to ensure that data Successful transmissions provide one Kind response mode, and being capable of effectively save transfer resource.
Detailed description of the invention
Fig. 1 is a kind of method flow diagram of frame acknowledgment of first embodiment of the invention;
Fig. 2 is a kind of group acknowledge frame format schematic diagram of first embodiment of the invention;
Fig. 3 is a kind of ACK frame format schematic diagram of second embodiment of the invention;
Fig. 4 is a kind of method flow diagram of re-transmission of third embodiment of the invention;
Fig. 5 is a kind of G-MPDU form schematic diagram of third embodiment of the invention;
Fig. 6 is a kind of G-MPDU sub-frame formats schematic diagram of third embodiment of the invention;
Fig. 7 is a kind of method flow diagram for re-transmission of fourth embodiment of the invention;
Fig. 8 is a kind of group acknowledge claim frame form schematic diagram of fourth embodiment of the invention;
Fig. 9 is a kind of device block diagram for frame acknowledgment of fifth embodiment of the invention;
Figure 10 is a kind of device block diagram for frame acknowledgment of sixth embodiment of the invention.
Specific embodiment
The following description and drawings fully show specific embodiments of the present invention, so that those skilled in the art's energy Enough practice them.Other embodiments may include structure, logic, it is electrical, process and other change.It is real It applies example and only represents possible variation.Unless explicitly requested, otherwise individual component and function are optional, and are operated suitable Sequence can change.The part of some embodiments and feature can be included in or replace part and the spy of other embodiments Sign.The range of embodiment of the present invention includes that the entire scope of claims and all of claims can get Equivalent.Herein, these embodiments of the invention individually or can be indicated generally with term " invention ", This is not meant to automatically limit the application just for the sake of convenient, and if in fact disclosing the invention more than one Range is any single invention or inventive concept.
First embodiment
The embodiment of the invention provides a kind of methods of frame acknowledgment, are not only suitable for management frame and are also applied for data frame.It sends After end sends frame, receiving end returns to confirmation response, to inform whether data described in transmitting terminal are successfully received, so as to right Data send success or not and carry out effective monitoring.
Referring to Fig. 1, the figure shows a kind of frame acknowledgment methods of the embodiment of the present invention, comprising steps of
Step S101: the confirmation response of one or more frame is encapsulated as group acknowledge response (GroupAck);
Wherein, the confirmation response of the frame is indicating the reception state of frame, including receives and do not receive.
Step S102: the group acknowledge response is sent.
The embodiment of the invention provides a kind of response modes of group acknowledge, and the confirmation response of multiple frames is encapsulated to same It is sent in frame, using this response mode, same frame head parameter only needs to pass once, is effectively saved transmission Resource;When in addition transmitting on the physical channel, answering for multiple frames can be got by executing synchronizing for frame (group acknowledge response) It answers, to effectively save physical transfer resource.
Wireless communication system supports multiple business, the transmission of data to transmit according to Business Stream.According to type, Business Stream can To be divided into management business stream and data Business Stream.Wherein, management business stream is made of one or more management frame, data industry Business stream is made of one or more data frame.It can also be more by data service flow point according to specific type of service Stream, such as Business Stream 1 (being indicated with FID1), Business Stream 2 (are indicated) with FID2 ..., and Business Stream n (is indicated) with FIDn.
Therefore, step S101 can further comprise (not shown):
Step S1011: the confirmation response of one or more frame on same Business Stream is encapsulated as Business Stream confirmation and is answered It answers;
Step S1012: the confirmation response of one or more Business Stream is encapsulated as group acknowledge response.
When encapsulating group acknowledge response, the mark and each business of one or more of Business Streams are also encapsulated The mark of one or more of frames on stream, so that receiving end identifies which industry the group acknowledge response received is to accordingly The confirmation which frame on business stream is made.
Preferably, the embodiment of the present invention proposes on each bit in a bitmap (bitmap) successively traffic streams The confirmation response of each frame.The confirmation response of corresponding frame is identified with the serial number of the corresponding frame of bit in the bitmap. Learn that carry in the bit is answering for which frame according to the serial number of the corresponding frame of bit in the bitmap in receiving end It answers, according to the confirmation response content of the worth frame for knowing the bit serial number mark of the bit.
It, can specific position in the continuous frame preferably, when to continuous multiple frame responses on Business Stream Frame, such as come on identification service stream with the length of the serial number of the corresponding frame of bit first in bitmap and bitmap continuous more The confirmation response of a frame, each in bitmap correspond to the confirmation response of a frame.
Preferably, the length of the bitmap is not fixed, the response quantity of the frame of return is very flexible, further increases Resource utilization.
Preferably, fragment instruction information can also be arranged, to indicate that is carried in corresponding bitmap is the frame of fragment Confirm response, still the confirmation response of the frame of non-fragment.That is, the embodiment of the present invention supports the confirmation response to the frame of non-fragment, Also the confirmation response to the frame of fragment is supported, while can be with the frame of the confirmation response of the frame of hybrid feedback fragment and non-fragment Confirm response.For example, carrying the confirmation response of FID0 and FID1 in group acknowledge response, the frame on FID0 is the frame of non-fragment, Frame on FID1 is the frame of fragment, then with the confirmation response of the frame of the non-fragment on bitmap0 instruction FID0, with bitmap1 Indicate the confirmation response of the frame of the fragment on FID1.For another example the confirmation for carrying FID0 and FID1 in group acknowledge response is answered It answers, the frame on FID0 includes the frame of non-fragment and the frame of fragment, and the frame on FID1 is the frame of non-fragment, then is indicated with bitmap0 The confirmation response of the frame of non-fragment on FID0 indicates the confirmation response of the frame of the fragment on FID0 with bitmap1, with Bitmap2 indicates the confirmation response of the frame of the non-fragment on FID1.
In order to more intuitively illustrate, the embodiment of the invention also provides a kind of format of specific group acknowledge frame, such as Fig. 2 It is shown.Group acknowledge frame shown in Fig. 2 includes frame head, frame and frame check information (FCS).It include frame control information, example in frame head Such as frame type (management frame perhaps data frame), subtype (specific management frame or specific data frame type), version This information etc.;Include one or more FID block of information in frame, includes traffic stream identifier, serial number in the FID block of information And bitmap, wherein the bitmap is used to carry the confirmation response of continuous multiple frames, each correspondence in bitmap The confirmation response of one frame, the serial number are used to indicate the serial number of the corresponding frame of first bit in the bitmap.
Preferably, each FID block of information is arranged according to the length of bitmap;The length of the bitmap is not fixed.
Preferably, also setting up the length field of bitmap in the FID block of information, it is used to indicate the length of bitmap.
Preferably, also setting up fragment instruction information, in the FID block of information with indicate to carry in the bitmap The confirmation response of the frame of fragment, or non-fragment frame confirmation response.
Preferably, management control frame acknowledgement bit is also set up in frame, for receiving one without sequence number management control Frame processed is confirmed.
Preferably, length field can be arranged in frame, it is used to indicate institute between the length field and FCS field There is the total byte length of field, that is, indicate the sum of the length of all FID block of informations.
Each parameter definition in frame can refer to table 1.
Table 1
The confirmation response of the frame is indicating the reception state of frame, including receives and do not receive.
The trigger timing for returning to frame acknowledgment response to the embodiment of the present invention is illustrated below:
1, confirm immediately:
Mode 1: after receiving confirmation request immediately, acknowledgement frame is returned immediately.
Wherein, the confirmation request immediately can be the request frame format that both sides appoint.Preferably, described vertical I.e. confirmation request can be group acknowledge request, carry one in the mark and each Business Stream of one or more Business Stream Or the mark of multiple frames, to indicate to return to the confirmation response of the designated frame on specified services stream immediately.Receiving described group After confirmation request, the confirmation response of the designated frame in specified data flow is returned immediately.
The confirmation request immediately is also possible to the indicating bit that both sides appoint.For example, certain in agreement data frame One field is to confirm indicating bit immediately.When parsing data frame, if parsing confirmation instruction immediately from data frame, stand Return to acknowledgement frame.
Preferably, the setting instruction of confirmation immediately is carried in the frame head of data frame.
Acknowledgement frame is returned described in the embodiment of the present invention immediately, is returned in next time cycle.
In the embodiment of the present invention, central access point (CAP) and website (STA) can transmitting terminal and receiving ends each other.Its In, CAP is to provide the entity of access service for the STA of access;STA is with media access control (MAC) and physical layer (PHY) functional interface, the terminal device that can be communicated with CAP.Transmitting-receiving both-end is communicated by physical frame, each physical frame week Phase successively includes downstream cycle and upward cycle: CAP sends data to STA in downstream cycle;STA is sent out in upward cycle to CAP Send data.In the embodiment of the present invention, when instruction opposite end returns to acknowledgement frame immediately, indicated return duration immediately is that is, next Time cycle refers to that the ascending physical signal frame period corresponds to the downstream physical frame period or the downstream physical frame period corresponds to upper one The upward cycle of physical frame.Specifically, being to send the carrying in the downlink physical period of this frame when transmitting terminal is CAP When confirming the data frame of instruction immediately, the instruction of confirmation immediately is used to indicate STA and returns to frame in the ascending physical signal period of this frame Confirm response;It is to send to carry the data for confirming instruction immediately in the ascending physical signal period of this frame when transmitting terminal is STA Frame, the instruction of confirmation immediately are used to indicate CAP and return to frame acknowledgment response in the downlink physical period of next frame.
2, delayed acknowledgement:
When not receiving confirmation request immediately, it is believed that opposite end is allowed to postpone to return to the confirmation response of frame.
In the embodiment of the present invention, the indicating bit that both sides appoint, dominant indication lag confirmation.For example, agreement data A certain field in frame is delayed acknowledgement indicating bit.Interval is waited to be determined by transmitting terminal using the frame acknowledgment of delayed acknowledgement, it can be with It is sent in available free resource.When parsing data frame, if delayed acknowledgement instruction is parsed from data frame, free Acknowledgement frame is returned when not busy resource.
Second embodiment
For managing control frame, the unicast management control frame for not corresponding to response frame is needed using ACK or group acknowledge frame (GroupAck) confirm, otherwise directly with corresponding response frame acknowledgment.
The embodiment of the invention also provides some management frame claim frames and its corresponding response frames, as shown in table 2.Certainly, In another embodiment, other management claim frames can also be set as needed and its corresponding response, the present invention are not done herein Limitation.
Table 2
The management control frame (except random access request response frame and independent resource claim frame) of all non-broadcasting requires to send out Send acknowledgement frame or implicit confirmation.Implicit confirmation refers to for there is the unicast management control frame of corresponding response frame that can will respond Acknowledgement frame of the frame as this frame.The management control frame of non-broadcasting do not need to confirm immediately, and response frame can allow later It is responded in greatest physical frame number.The response frame that CAP is sent can not receive the acknowledgement frame of STA, can be not up to preset The response frame is retransmitted before maximum retransmission, more than after the preset maximum retransmission, transmitting terminal will abandon number of retransmissions The frame.
Data frame is determined using confirmation and delayed acknowledgement immediately by transmitting terminal.Receiving end can be according to being arranged in MAC The field of frame acknowledgment mode is indicated to indicate whether to need to confirm immediately.Waiting interval using the frame acknowledgment confirmed immediately is one A time cycle.Interval is waited to be determined by transmitting terminal using the frame acknowledgment of delayed acknowledgement.
If it is confirmed that mode is when confirming immediately, not receive acknowledgement frame in next time cycle, then can not reach The data frame is retransmitted before to preset maximum retransmission, number of retransmissions is more than transmission after the preset maximum retransmission End will abandon the frame.Next time cycle said herein can correspond to the downstream physical frame period with the ascending physical signal frame period, It can be upward cycle of the downstream physical frame period corresponding to a upper physical frame.That is, the downlink physical period in this frame sends institute Carrying is stated when confirming the data frame of instruction immediately, the instruction of confirmation immediately is used to indicate to be returned in the ascending physical signal period of this frame Return frame acknowledgment response;It is described to confirm immediately when the ascending physical signal period transmission of this frame carries and confirms the data frame of instruction immediately It indicates to be used to indicate and returns to frame acknowledgment response in the downlink physical period of next frame.When MPDU is retransmitted, serial number and fragment number are protected It holds constant.
If it is confirmed that not receiving acknowledgement frame when mode is delayed acknowledgement in the waiting interval of transmitting terminal setting, then may be used To retransmit the data frame before not up to preset maximum retransmission, number of retransmissions is more than the preset maximum re-transmission time After number, transmitting terminal will abandon the frame.
ACK frame and GroupAck frame, it is no longer necessary to which other frames are confirmed.
For the data frame of fragment and non-fragment, ACK or GroupAck any one mode can be used and confirm.
The embodiment of the invention also provides another frame acknowledgment mode (ACK frames), suitable for being confirmed for single frames. In order to more intuitively illustrate, the embodiment of the invention also provides a kind of formats of specific acknowledgement frame, as shown in Figure 3.Fig. 3 institute The acknowledgement frame shown includes frame head, frame and frame check information (FCS).It include frame control information, such as frame type (pipe in frame head Manage frame perhaps data frame), subtype (specific management frame or specific data frame type), version information etc.;Frame It include FID, fragment number (FSN), number of frames (SN) in body.Each parameter definition in frame can refer to table 3.
Table 3
3rd embodiment
The embodiment of the invention provides a kind of methods of re-transmission, as shown in figure 4, comprising steps of
Step S401: the frame that caching has been sent;
Step S402: frame acknowledgment response is received and parsed through;
Step S403: it retransmits and received frame is confirmed in the frame of caching.
The data that repeating method provided in an embodiment of the present invention is retransmitted by transmitting terminal maintenance only retransmit not really when retransmitting Recognize received frame, the frame having been received no longer is retransmitted.Especially when retransmitting data according to preset window, allow in window Have been acknowledged that without retransmitting, transfer resource is greatly saved in the frame received.
Received frame is had confirmed that preferably, can delete in the frame of caching.To effectively save local cache resource.
Preferably, one or more continuous frame can be encapsulated as to framing (G-MPDU) transmission.As shown in figure 5, G- MPDU is made of a series of G-MPDU subframes.As shown in fig. 6, G-MPDU subframe includes G-MPDU delimiter, MPDU and possible Byte of padding.In addition to the last one G-MPDU subframe, each G-MPDU subframe needs to increase by 0~1 byte of padding, makes each The length of G-MPDU subframe is the integral multiple of 2 bytes.Shown G-MPDU delimiter is used to position the MPDU unit of G-MPDU.It will Multiple frames, which are packaged together, to be sent, and when transmitting on the physical channel, executing synchronizing for frame (framing) can be got Multiple frames, to effectively save physical transfer resource.
The frame acknowledgment response received in step S402 can be the group acknowledge response provided using embodiment one, can also To be the confirmation response for the single frames that embodiment two provides.
Fourth embodiment
The considerations of for caching capabilities, causes to malfunction beyond caching capabilities in order to prevent, and the embodiment of the present invention also provides A kind of method for re-transmission, increase are monitored the caching capabilities of local terminal, and detecting caching capabilities, there may be super Out when risk, opposite end is notified to return to response immediately in time, specifically as shown in fig. 7, comprises step:
Step S701: caching does not receive the frame of confirmation response;
Step S701: judge whether to reach buffer memory capacity threshold value;
Step S701: when reaching buffer memory capacity threshold value, sending confirmation request immediately, returns to frame acknowledgment immediately with instruction Response.
Preferably, the confirmation request immediately carries in the mark and each Business Stream of one or more Business Stream The mark of one or more frame, to indicate to return to the confirmation response of the designated frame in specified data flow immediately.
Preferably, the confirmation request immediately can carry the serial number for needing to return the first frame of response on each Business Stream, To indicate that opposite end returns to the confirmation response of the frame on the Business Stream since the first frame.
In order to more intuitively illustrate, the embodiment of the invention also provides a kind of specific frame format of confirmation request immediately, As shown in Figure 8.The frame of confirmation request immediately shown in Fig. 8 includes frame head, frame and frame check information (FCS).It include frame in frame head Control information, such as frame type (management frame perhaps data frame), subtype (specific management frame or specific data Frame type), version information etc.;Include one or more FID block of information in frame, includes Business Stream in each FID block of information FID and serial number are identified, needs to return the serial number of the first frame of confirmation response in the serial number business, to indicate opposite end from institute First frame is stated to start to return to confirmation response, it is corresponding with the first bit of bitmap in the group acknowledge provided in embodiment one The serial number of frame is corresponding.Each parameter definition can refer to table 4 in frame.
Table 4
Preferably, the embodiment of the invention also provides another modes for realizing confirmation request immediately: by will immediately really Recognize instruction to be carried in data frame, be sent with data frame, to send confirmation request immediately;The confirmation instruction immediately, is used Frame acknowledgment response is returned immediately in instruction.
Preferably, confirmation instruction immediately can be carried in the frame head of data frame.
Wherein, described to return to frame acknowledgment response immediately, it is to return to the group acknowledge response in next time cycle.Institute State next time cycle refer to the ascending physical signal frame period correspond to downstream physical frame period or downstream physical frame period pair The upward cycle of the upper physical frame of Ying Yu.That is, sending the number that the carrying confirms instruction immediately in the downlink physical period of this frame When according to frame, the instruction of confirmation immediately is used to indicate opposite end and returns to frame acknowledgment response in the ascending physical signal period of this frame;In this frame The ascending physical signal period send and carry when confirming the data frame of instruction immediately, the instruction of confirmation immediately is used to indicate opposite end and exists The downlink physical period of next frame returns to frame acknowledgment response.
Preferably, delayed acknowledgement instruction can also be carried on by the embodiment of the present invention in not up to buffer memory capacity threshold value In data frame, sent with data frame.The delayed acknowledgement instruction, being used to indicate allows to postpone to return to institute on each Business Stream There is the confirmation response of unacknowledged data frame.Opposite end refers to when parsing data frame if parsing delayed acknowledgement from data frame Show, then returns to all unacknowledged frame acknowledgment responses on each Business Stream in available free resource.
The embodiment of the invention also provides the selection that a kind of frame acknowledgment sends opportunity, central access point (CAP) and website (STA) can transmitting terminal and receiving end each other, specifically include:
If 1, CAP sends management control frame (needing to confirm) and needs to STA, CAP in scheduling of upstream transmissions resource Resource is reserved for acknowledgement frame, guarantees that STA has an opportunity to will confirm that frame is successfully transmitted.
If 2, CAP sends G-MPDU to STA, and the instruction of the field by being used to indicate frame acknowledgment mode STA is stood Confirm, then CAP needs to reserve resource for GroupAck frame or ACK frame in scheduling of upstream transmissions resource.
If 3, CAP sends aggregate data frame to STA, and the instruction of the field by being used to indicate frame acknowledgment mode allows STA delay response, then STA actively can return GroupAck frame when uplink transmission resource has residue, can also wait GroupAck frame is returned again after receiving the acknowledgement notification immediately of CAP transmission.
If 4, STA sends management control frame (needing to confirm) to CAP, CAP should be in the downlink physical week of next frame Phase is confirmed.
If 5, STA sends G-MPDU to CAP, and the instruction of the field by being used to indicate frame acknowledgment mode CAP is true immediately Recognize, then CAP sends GroupAck frame or ACK frame in the downlink physical period of next frame.
If 6, STA sends aggregate data frame to CAP, and the instruction of the field by being used to indicate frame acknowledgment mode allows CAP delay response, then CAP actively can return GroupAck frame when downlink transfer resource has residue, can also wait GroupAck frame is returned again after receiving the acknowledgement notification immediately of STA transmission.
5th embodiment
In order to realize that frame acknowledgment method of the embodiment of the present invention, the present invention also propose a kind of device for frame acknowledgment, such as scheme Shown in 9, comprising:
Package module 901, for the confirmation response of one or more frame to be encapsulated as group acknowledge response;
Sending module 902, for sending the group acknowledge response.
Preferably, the package module 901, for by the confirmation response of one or more frame on same Business Stream It is encapsulated as Business Stream confirmation response;One or more described Business Stream confirmation response is encapsulated as group acknowledge response.
Preferably, the package module 901, for encapsulating the frame head, frame and FCS of group acknowledge response: being set in frame It sets one or more FID block of information, includes traffic stream identifier, serial number and bitmap bitmap in the Business Stream confirmation response, Wherein the bitmap is used to carry the confirmation response of continuous multiple frames, each in bitmap corresponds to a frame really Recognize response, the serial number is used to indicate the serial number of the corresponding frame of first bit in the bitmap.
Preferably, the package module 901, for each FID block of information to be arranged according to the length of bitmap;It is described The length of bitmap is not fixed.
Preferably, the package module 901, the length field of bitmap is arranged also in the FID block of information, is used for Indicate the length of bitmap.
Preferably, the package module 901, is arranged fragment also in the FID block of information and indicates information, to indicate State carried in bitmap be fragment frame confirmation response, or non-fragment frame confirmation response.
Preferably, the package module 901, the setting management control frame acknowledgement bit also in group acknowledge response, for docking One is received to be confirmed without sequence number management control frame.
Preferably, the package module 901, is also arranged length field in frame, it is used to indicate all FID block of informations The sum of length.
Preferably, the confirmation response of the frame is indicating the reception state of frame, including receives and do not receive.
Preferably, further include:
First control module 904 for receiving confirmation request immediately, and controls the 901 encapsulation group of package module accordingly Confirm that response, and the control sending module 902 send packaged group acknowledge response immediately.
Preferably, the confirmation request immediately carries in the mark and each Business Stream of one or more Business Stream The mark of one or more frame;First control module 904 controls the Encapsulation Moulds according to the confirmation request immediately The confirmation response of designated frame in specified data flow is encapsulated as group acknowledge response by block 901.
Preferably, described send immediately, it is to return to the group acknowledge response in next time cycle.It is described next Time cycle refers to that the ascending physical signal frame period corresponds to the downstream physical frame period or the downstream physical frame period corresponds to upper one The upward cycle of physical frame.That is, first control module 904, from the downlink physical period of this frame receive it is described immediately When confirmation request, controls the sending module 902 and send packaged group acknowledge response in the ascending physical signal period of this frame;? When receiving the confirmation request immediately from the ascending physical signal period of this frame, the sending module 902 is controlled under next frame The row physics period sends packaged group acknowledge response.
Preferably, further include:
Second control module 904 carries the data frame for confirming instruction immediately for receiving, according to the control of confirmation instruction immediately It makes the package module 901 and encapsulates group acknowledge response, and to send packaged group immediately true for the control sending module 902 Recognize response.
Preferably, second control module 904, for control the package module 901 by each Business Stream it is all not The confirmation response of the frame of confirmation is encapsulated as group acknowledge response, and the control sending module 902 sends packaged group immediately Confirm response.
Preferably, second control module 904 obtains the confirmation immediately and refers to by parsing the frame head of data frame Show.
Preferably, described send immediately, it is to return to the group acknowledge response in next time cycle;It is described next Time cycle refers to that the ascending physical signal frame period corresponds to the downstream physical frame period or the downstream physical frame period corresponds to upper one The upward cycle of physical frame.That is, second control module 904, is receiving carrying immediately from the downlink physical period of this frame When confirming the data frame of instruction, the ascending physical signal period for controlling the sending module 902 in this frame sends packaged group acknowledge Response;From the ascending physical signal period of this frame receive carrying confirm the data frame of instruction immediately when, control the sending module 902 send packaged group acknowledge response in the downlink physical period of next frame.
Preferably, further include:
Third control module 905 exists for receiving the data frame for carrying delayed acknowledgement instruction according to delayed acknowledgement instruction When available free resource, controls the package module 901 and encapsulate group acknowledge response, and the control sending module 902 sends envelope The group acknowledge response installed.
Sixth embodiment
In order to realize that frame acknowledgment method of the embodiment of the present invention, the present invention also propose another device for being used for frame acknowledgment, such as Shown in Figure 10, comprising:
Package module 1001 carries one or more business in the group acknowledge request for generating group acknowledge request The mark for the frame for needing to confirm in the mark of stream and each Business Stream;
Sending module 1002, for sending the group acknowledge request.
Preferably, package module 1001, for encapsulating group acknowledge claim frame, to generate the group acknowledge request;
The group acknowledge request includes frame head, frame and FCS, includes one or more FID information in the frame Block includes traffic stream identifier FID and serial number in each FID block of information, to need the sequence of the first frame of response on the Business Stream Mark number as the frame for needing to confirm on the Business Stream, instruction return to frame acknowledgment since the first frame.
Preferably, the package module 1001, is also arranged FID digital section in group acknowledge request, is used to indicate frame In include FID block of information number.
Preferably, the group acknowledge request is used to indicate the confirmation response for returning to the designated frame in specified data flow immediately.
Preferably, described return to group acknowledge response immediately, it is to return to the group acknowledge response in next time cycle;
Next time cycle refers to that the ascending physical signal frame period corresponds to downstream physical frame period or downlink object Manage upward cycle of the frame period corresponding to a upper physical frame.That is, if the sending module 1002 is all in the downlink physical of this frame Phase transmission group acknowledge request, then the confirmation immediately is indicated to be used to indicate and be answered in the ascending physical signal period return frame acknowledgment of this frame It answers;If the sending module 1002 sends group acknowledge request, the confirmation instruction immediately in the ascending physical signal period of this frame It is used to indicate and returns to frame acknowledgment response in the downlink physical period of next frame.
According to the disclosed embodiment, those skilled in the art can be made to can be realized or using the present invention.It is right For those skilled in the art, the various modifications of these embodiments are it will be apparent that and the general principles that define here It can also be applied to other embodiments on the basis of not departing from the scope and spirit of the present invention.Embodiment described above is only It for presently preferred embodiments of the present invention, is not intended to limit the invention, all within the spirits and principles of the present invention, is made Any modification, equivalent substitution, improvement and etc., should all be included in the protection scope of the present invention.

Claims (8)

1. a kind of method for frame acknowledgment characterized by comprising
The confirmation response of one or more frame is encapsulated as group acknowledge response, is specifically included:
The confirmation response of one or more frame on same Business Stream is encapsulated as Business Stream confirmation response;It is by one or more A Business Stream confirmation response is encapsulated as group acknowledge response;
Encapsulate frame head, frame and the frame check information FCS of group acknowledge response;
One or more FID Business Stream block of information is set in frame, is failed to be sold at auction in the FID Business Stream block of information including business Knowledge, serial number and bitmap bitmap, wherein the bitmap is used to carry the confirmation response of continuous multiple frames, it is every in bitmap The confirmation response of one correspondence, one frame, the serial number are used to indicate the sequence of the corresponding frame of first bit in the bitmap Number;
Send the group acknowledge response;After receiving confirmation request immediately or confirmation instruction immediately, described group is returned immediately Confirm response, specifically include:
Each physical frame period successively includes downstream cycle and upward cycle, is received immediately really in the downlink physical period of this frame When recognizing request or confirmation instruction immediately, group acknowledge response is returned in the ascending physical signal period of this frame;In the ascending physical signal of this frame When period receives confirmation request immediately or confirmation instruction immediately, group acknowledge is returned in the downlink physical period of next frame and is answered It answers;
Central access point and website transmitting terminal and receiving end each other are sent and received one of in the following manner:
(1) if, central access point send and need the management control frame that confirms to website, central access point is passed in dispatching uplink Resource is reserved when defeated resource for corresponding acknowledgement frame;
(2) if, central access point transmission group Medium Access Control (MAC) Protocol Data Unit (G-MPDU) give website, and it is true by being used to indicate frame The field instruction website for recognizing mode is confirmed that then central access point is corresponding confirmation in scheduling of upstream transmissions resource immediately Frame reserves resource;
(3) if, central access point send aggregate data frame to website, and the field by being used to indicate frame acknowledgment mode indicate Website is allowed to postpone response, then website actively can return group acknowledge frame when uplink transmission resource has residue, or wait Group acknowledge frame is returned again after receiving the acknowledgement notification immediately of central access point transmission;
(4) if, website send and need the management control frame that confirms to central access point, central access point should be in next frame The downlink physical period confirmed;
(5) if, website transmission group Medium Access Control (MAC) Protocol Data Unit (G-MPDU) give central access point, and it is true by being used to indicate frame The field Deictic Center access point for recognizing mode confirms that then central access point sends confirmation in the downlink physical period of next frame immediately Frame;
(6) if, website send aggregate data frame to central access point, and the field by being used to indicate frame acknowledgment mode indicate Allow central access point to postpone response, then central access point actively returns group acknowledge frame when downlink transfer resource has residue, Or group acknowledge frame is returned again after waiting the acknowledgement notification immediately for receiving website transmission.
2. the method as described in claim 1, it is characterised in that:
According to the length of bitmap, each FID Business Stream block of information is set;The length of the bitmap is not fixed;And/or
The length field of bitmap is set in the FID Business Stream block of information, is used to indicate the length of bitmap;And/or
Length field is set in frame, is used to indicate the sum of the length of all FID Business Stream block of informations;And/or
Fragment is set in the FID Business Stream block of information and indicates information, is fragment with indicate to carry in the bitmap The confirmation response of frame, or non-fragment frame confirmation response;And/or
In frame setting management control frame acknowledgement bit, for receive one without sequence number management control frame confirm.
3. method according to claim 1 or 2, it is characterised in that:
The confirmation request immediately carries one or more in the mark and each Business Stream of one or more Business Stream The mark of frame;
Return to the confirmation response of the designated frame in specified data flow immediately according to the confirmation request immediately.
4. method according to claim 1 or 2, it is characterised in that:
The frame head of the frame is parsed, confirmation instruction immediately is therefrom obtained.
5. a kind of device for frame acknowledgment characterized by comprising
Package module, for the confirmation response of one or more frame to be encapsulated as group acknowledge response;
Sending module, for sending the group acknowledge response;
Wherein, the package module, for the confirmation response of one or more frame on same Business Stream to be encapsulated as business Stream confirmation response;One or more described Business Stream confirmation response is encapsulated as group acknowledge response;
Wherein, the package module, for encapsulating the frame head, frame and FCS of group acknowledge response, in frame be arranged one or Multiple FID Business Stream block of informations, include traffic stream identifier, serial number and bitmap bitmap in Business Stream confirmation response, wherein The bitmap is used to carry the confirmation response of continuous multiple frames, each confirmation for corresponding to a frame in bitmap is answered It answers, the serial number is used to indicate the serial number of the corresponding frame of first bit in the bitmap;
Control module for receiving confirmation request immediately or immediately confirmation instruction, and controls the package module encapsulation accordingly Group acknowledge response, and the control sending module send packaged group acknowledge response immediately;
Each physical frame period successively includes downstream cycle and upward cycle, described in receiving from the downlink physical period of this frame Immediately when confirmation request, the control module controls the sending module and sends packaged group in the ascending physical signal period of this frame Confirm response;When from the confirmation request immediately is received in the ascending physical signal period of this frame, the sending module is controlled under The downlink physical period of one frame sends packaged group acknowledge response;
The control module, is specifically used for:
(1) if, central access point send and need the management control frame that confirms to website, central access point is passed in dispatching uplink Resource is reserved when defeated resource for corresponding acknowledgement frame;
(2) if, central access point transmission group Medium Access Control (MAC) Protocol Data Unit (G-MPDU) give website, and it is true by being used to indicate frame The field instruction website for recognizing mode is confirmed that then central access point is corresponding confirmation in scheduling of upstream transmissions resource immediately Frame reserves resource;
(3) if, central access point send aggregate data frame to website, and the field by being used to indicate frame acknowledgment mode indicate Website is allowed to postpone response, then website actively can return group acknowledge frame when uplink transmission resource has residue, or wait Group acknowledge frame is returned again after receiving the acknowledgement notification immediately of central access point transmission;
(4) if, website send and need the management control frame that confirms to central access point, central access point should be in next frame The downlink physical period confirmed;
(5) if, website transmission group Medium Access Control (MAC) Protocol Data Unit (G-MPDU) give central access point, and it is true by being used to indicate frame The field Deictic Center access point for recognizing mode confirms that then central access point sends confirmation in the downlink physical period of next frame immediately Frame;
(6) if, website send aggregate data frame to central access point, and the field by being used to indicate frame acknowledgment mode indicate Allow central access point to postpone response, then central access point actively returns group acknowledge frame when downlink transfer resource has residue, Or group acknowledge frame is returned again after waiting the acknowledgement notification immediately for receiving website transmission.
6. device as claimed in claim 5, it is characterised in that:
The package module, for each FID Business Stream block of information to be arranged according to the length of bitmap;The length of the bitmap is not It is fixed;And/or
The length field of bitmap is arranged also in the FID Business Stream block of information, is used to indicate bitmap for the package module Length;And/or
The package module, is also arranged length field in frame, be used to indicate all FID Business Stream block of informations length it With;And/or
The package module is arranged fragment also in the FID Business Stream block of information and indicates information, to indicate in the bitmap Carrying be fragment frame confirmation response, or non-fragment frame confirmation response;And/or
The package module, the setting management control frame acknowledgement bit also in group acknowledge response, for receiving one without sequence Number management control frame confirmed.
7. such as device described in claim 5 or 6, it is characterised in that:
The confirmation request immediately carries one or more in the mark and each Business Stream of one or more Business Stream The mark of frame;
The control module controls the package module for the designated frame in specified data flow according to the confirmation request immediately Confirmation response is encapsulated as group acknowledge response.
8. such as device described in claim 5 or 6, it is characterised in that:
The control module obtains the confirmation instruction immediately by parsing the frame head of frame.
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