CN105429737A - Method and device for frame acknowledgement - Google Patents
Method and device for frame acknowledgement Download PDFInfo
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- CN105429737A CN105429737A CN201510864249.1A CN201510864249A CN105429737A CN 105429737 A CN105429737 A CN 105429737A CN 201510864249 A CN201510864249 A CN 201510864249A CN 105429737 A CN105429737 A CN 105429737A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements 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
- H04L1/1607—Details of the supervisory signal
- H04L1/1621—Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements 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
- H04L1/1607—Details of the supervisory signal
- H04L1/1685—Details of the supervisory signal the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements 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
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1825—Adaptation of specific ARQ protocol parameters according to transmission conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements 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
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1854—Scheduling and prioritising arrangements
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
Abstract
The invention provides a method and a device for frame acknowledgement. The method comprises: packaging acknowledgement answers of one or more frames into an acknowledgement answer group; and sending the acknowledgement answer group. The method can reduce transmission resources occupied by frame acknowledgement and effectively ensure successful data transmission.
Description
The application is the applying date is on March 23rd, 2012, and application number is 201280013095.X, and denomination of invention is a kind of division of parent application of the method and apparatus for frame acknowledgment.
Technical field
The invention belongs to wireless communication field, particularly relate to a kind of method and apparatus for frame acknowledgment.
Background technology
In recent years, radio network technique has the WLAN (wireless local area network) WiFi technology based on 802.11 standards, the bluetooth Bluetooth system based on 802.15 and Femto technology towards indoor application of being derived by mobile communication system etc.
WiFi technology based on IEEE802.11 uses the widest a kind of wireless network transmission technology now.Be mainly used in radio local network environment, application scenarios is in the majority with indoor, also can be applicable to outdoor environment.802.11 systems are evolved to 802.11a and 802.11g based on OFDM technology by the initial 802.11b based on CDMA transmission mechanism.Although in up-to-date IEEE802.11n-2009 standard, 802.11n physical layer peak rate is made to reach 600Mbps by introducing multiple antennas (MIMO) technology, but usually handling up of medium education (MAC, MediaACessControl) layer only maximumly can reach 300Mbps.So for traditional wlan system, the MAC layer design that the single user based on CSMA/CA (carrier sense/conflict avoidance) accesses is the bottleneck of network performance always.So, although existing Wi-Fi technology is to a certain extent for user provides cheap user mode access, be difficult to the multimedia service demand adapting to the two-forty of the current and following develop rapidly again.
Femto technology based on 3GPP standard is a kind of new technology towards in-door covering come from mobile communication system evolution, Femto technology based on 3G system adopts CDMA transmission mechanism, and the Femto technology towards LTE or WiMAX system then adopts OFDM transmission mechanism.Its multiple access access mechanism is that different users distributes mutually orthogonal access-in resource by time, frequency, code word, and these are different from there being essence towards the CSMA/CA random multi-access channel competed.But Femto technology is derived by the 3G/LTE/WiMAX system towards mobile communication system.Because 3G/LTE/WiMAX system is mainly towards the mobile communication scene that wide area covers, its system features is not optimized for short-distance and medium-distance radio communication scene.Simultaneously based on the upper-layer protocol design of 3G/LTE/WiMAX more complicated and PHY layer to the synchronous strict demand waited, cause equipment cost can not accomplish as 802.11 cheap, this is also one of current major reason be not always widely used of Femto technology.
In the face of the multimedia service application demand of develop rapidly day by day, in order to meet wireless communication needs better, need the implementation proposing more to be suitable for.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of method and apparatus for frame acknowledgment, thus effectively guarantees data Successful transmissions.
The invention provides a kind of method for frame acknowledgment, comprising:
The confirmation of one or more frame response is encapsulated as group acknowledge response;
Send the response of described group acknowledge;
Wherein, the confirmation of one or more frame on same Business Stream response is encapsulated as Business Stream and confirms response; One or more Business Stream is confirmed response is encapsulated as group acknowledge response;
Wherein, package group confirms frame head, frame and the frame check information FCS of response;
One or more FID block of information is set in frame, described FID block of information comprises traffic stream identifier, sequence number and bitmap bitmap, wherein said bitmap is for carrying the confirmation response of the multiple frame of continuous print, the confirmation response of each the corresponding frame in bitmap, described sequence number is used to indicate the sequence number of the frame that first bit is corresponding in described bitmap;
Wherein, receiving confirmation request immediately or after confirming instruction immediately, returning the response of described group acknowledge immediately;
Wherein, when the downlink physical cycle of this frame receives confirmation request immediately or confirms instruction immediately, group acknowledge response is returned in the ascending physical signal cycle of this frame; When the ascending physical signal cycle of this frame receives confirmation request immediately or confirms instruction immediately, return group acknowledge response in the downlink physical cycle of next frame.
Preferably, each FID block of information is set according to the length of bitmap; The length of described bitmap is not fixed; And/or
The length field of bitmap is set in described FID block of information, is used to indicate the length of bitmap; And/or
Length field is set in frame, is used to indicate the length sum of all FID block of information; And/or
In described FID block of information, burst indication information is set, with indicate carry in described bitmap be the frame of burst confirmation response, or the frame of non-burst confirmation response; And/or
Management control frame acknowledgement bit is set in frame, for confirming without sequence number management control frame receiving one.
Preferably, describedly confirm that the mark of one or more Business Stream is carried in request immediately, and the mark of one or more frame on each Business Stream;
The confirmation response that request returns the designated frame on named data stream is immediately confirmed immediately according to described.
Preferably, resolve the frame head of described Frame, therefrom obtain and confirm instruction immediately.
Preferably, when resolution data frame, if parse delayed acknowledgement instruction from Frame, then return the response of described group acknowledge when available free resource.
Present invention also offers a kind of device for frame acknowledgment, comprising:
Package module, for being encapsulated as group acknowledge response by the confirmation of one or more frame response;
Sending module, for sending the response of described group acknowledge;
Wherein, described package module, confirms response for the confirmation of one or more frame on same Business Stream response is encapsulated as Business Stream; Business Stream described in one or more is confirmed response is encapsulated as group acknowledge response;
Wherein, described package module, confirm the frame head, frame and the FCS that reply: one or more FID block of information is set in frame for package group, described Business Stream confirms that response comprises traffic stream identifier, sequence number and bitmap bitmap, wherein said bitmap is for carrying the confirmation response of the multiple frame of continuous print, the confirmation response of each the corresponding frame in bitmap, described sequence number is used to indicate the sequence number of the frame that first bit is corresponding in described bitmap;
Control module, confirms request immediately for receiving or confirms instruction immediately, and controls described package module package group according to this and confirm response, and controls described sending module and send the response of packaged group acknowledge immediately;
Described control module, when confirming request described in receiving from the downlink physical cycle of this frame immediately, controlling described sending module and sending packaged group acknowledge response in the ascending physical signal cycle of this frame; When confirming request described in receiving from the ascending physical signal cycle of this frame immediately, controlling described sending module and sending packaged group acknowledge response in the downlink physical cycle of next frame.
Preferably, described package module, for arranging each FID block of information according to the length of bitmap; The length of described bitmap is not fixed; And/or
Described package module, also arranges the length field of bitmap, is used to indicate the length of bitmap in described FID block of information; And/or
Described package module, also arranges length field in frame, is used to indicate the length sum of all FID block of information; And/or
Described package module, also arranges burst indication information in described FID block of information, with indicate carry in described bitmap be the frame of burst confirmation response, or the frame of non-burst confirmation response; And/or
Described package module, also arranges management control frame acknowledgement bit in group acknowledge response, for confirming without sequence number management control frame receiving one.
Preferably, describedly confirm that the mark of one or more Business Stream is carried in request immediately, and the mark of one or more frame on each Business Stream;
According to described, described control module, confirms that the confirmation of the designated frame on named data stream response is encapsulated as group acknowledge response by package module described in Request Control immediately.
Preferably, described control module, by the frame head of resolution data frame, confirms instruction immediately described in acquisition.
Preferably, control module, also for receiving the Frame carrying delayed acknowledgement instruction, according to delayed acknowledgement instruction when available free resource, controlling described package module package group and confirming response, and controls described sending module and send packaged group acknowledge response.
A kind of method and apparatus for frame acknowledgment provided by the invention, for guaranteeing that data Successful transmissions provides a kind of response mode, and effectively can save transfer resource.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of a kind of frame acknowledgment of first embodiment of the invention;
Fig. 2 is a kind of group acknowledge frame format of first embodiment of the invention schematic diagram;
Fig. 3 is a kind of ACK frame format of second embodiment of the invention schematic diagram;
Fig. 4 is the method flow diagram of a kind of re-transmission of third embodiment of the invention;
Fig. 5 is a kind of G-MPDU form of third embodiment of the invention schematic diagram;
Fig. 6 is a kind of G-MPDU sub-frame formats of third embodiment of the invention schematic diagram;
Fig. 7 is a kind of method flow diagram for retransmitting of fourth embodiment of the invention;
Fig. 8 is a kind of group acknowledge claim frame of fourth embodiment of the invention form schematic diagram;
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.
Embodiment
The following description and drawings illustrate specific embodiment of the invention scheme fully, to enable those skilled in the art to put into practice them.Other embodiments can comprise structure, logic, electric, process and other change.Embodiment only represents possible change.Unless explicitly requested, otherwise independent assembly and function are optional, and the order of operation 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 comprises the gamut of claims, and all obtainable equivalent of claims.In this article, these embodiments of the present invention can be represented with term " invention " individually or always, this is only used to conveniently, and if in fact disclose the invention more than, be not the scope that automatically will limit this application is any single invention or inventive concept.
First embodiment
Embodiments provide a kind of method of frame acknowledgment, be both applicable to management frames and be also applicable to Frame.After transmitting terminal transmission frame, receiving terminal returns and confirms response, to inform whether data described in transmitting terminal are successfully received, thus can send success or not to data and carries out effective monitoring.
See Fig. 1, the figure shows a kind of frame acknowledgment method of the embodiment of the present invention, comprise step:
Step S101: the confirmation of one or more frame response is encapsulated as group acknowledge response (GroupAck);
Wherein, the accepting state of confirmation response in order to indicate frame of described frame, comprises and receives and do not receive.
Step S102: send the response of described group acknowledge.
Embodiments provide a kind of response mode of group acknowledge, the confirmation of multiple frame response be packaged in same frame and send, adopt this response mode, same frame head parameter only needs to pass once, has effectively saved transfer resource; When transmitting on the physical channel in addition, perform the response that synchronously can get multiple frame of a frame (group acknowledge response), thus effective saving physical transfer resource.
Wireless communication system supports multiple business, and the transmission of data is transmitted according to Business Stream.According to type, Business Stream can be divided into managed traffic flow and data traffic flow.Wherein, managed traffic flow is made up of one or more management frames, and data traffic flow is made up of one or more Frame.According to concrete type of service, data traffic flow can also be divided into more stream, such as Business Stream 1 (representing with FID1), Business Stream 2 (representing with FID2) ... Business Stream n (representing with FIDn).
Therefore, step S101 can comprise (not shown) further:
Step S1011: the confirmation of one or more frame on same Business Stream response is encapsulated as Business Stream and confirms response;
Step S1012: one or more Business Stream is confirmed response is encapsulated as group acknowledge response.
When package group confirms response, the also mark of encapsulation one or more Business Stream described, and the mark of one or more frame described on described each Business Stream, group acknowledge response receiving terminal being identified according to this receive is the confirmation made which frame on which Business Stream.
Preferably, the embodiment of the present invention proposes to reply with the confirmation of each frame on each bit in a bitmap (bitmap) successively traffic streams.The confirmation response of corresponding frame is identified with the sequence number of frame corresponding to the bit in described bitmap.According to the sequence number of frame corresponding to bit in described bitmap, receiving terminal learns that what carry in described bit is the response of which frame, according to the worth confirmation response content knowing the frame that described bit sequence number identifies of described bit.
Preferably, when frame response multiple to continuous print on Business Stream, can the frame of ad-hoc location in described continuous print frame, such as with the sequence number of frame corresponding to bit first in bitmap, the confirmation response of continuous multiple frame on identification service stream is carried out, the confirmation response of each the corresponding frame in bitmap with the length of bitmap.
Preferably, the length of described bitmap is not fixed, and the response quantity of the frame returned is very flexible, further increases resource utilization.
Preferably, burst indication information can also be set, to indicate what carry in corresponding bitmap to be the confirmation response of the frame of burst, the still confirmation response of the frame of non-burst.That is, embodiment of the present invention support is replied the confirmation of the frame of non-burst, also supports to reply the confirmation of the frame of burst, simultaneously can the confirmation response of frame of hybrid feedback burst and the confirmation response of the frame of non-burst.Such as, in group acknowledge response, carry the confirmation response of FID0 and FID1, the frame on FID0 is the frame of non-burst, and the frame on FID1 is the frame of burst, then indicate the confirmation response of the frame of the non-burst on FID0 with bitmap0, indicate the confirmation response of the frame of the burst on FID1 with bitmap1.Again such as, the confirmation response of FID0 and FID1 is carried in group acknowledge response, frame on FID0 comprises the frame of non-burst and the frame of burst, frame on FID1 is the frame of non-burst, the confirmation response of the frame of the non-burst on FID0 is then indicated with bitmap0, indicate the confirmation response of the frame of the burst on FID0 with bitmap1, indicate the confirmation response of the frame of the non-burst on FID1 with bitmap2.
In order to illustrate more intuitively, the embodiment of the present invention additionally provides a kind of form of concrete group acknowledge frame, as shown in Figure 2.Group acknowledge frame shown in Fig. 2 comprises frame head, frame and frame check information (FCS).Frame control information is comprised, such as frame type (management frames or Frame), subtype (concrete management frame, or concrete data frame type), version information etc. in frame head; One or more FID block of information is comprised in frame, described FID block of information comprises traffic stream identifier, sequence number and bitmap, wherein said bitmap is for carrying the confirmation response of the multiple frame of continuous print, the confirmation response of each the corresponding frame in bitmap, described sequence number is used to indicate the sequence number of the frame that first bit is corresponding in described bitmap.
Preferably, each FID block of information is set according to the length of bitmap; The length of described bitmap is not fixed.
Preferably, the length field of bitmap is also set in described FID block of information, is used to indicate the length of bitmap.
Preferably, burst indication information is also set in described FID block of information, with indicate carry in described bitmap be the frame of burst confirmation response, or the frame of non-burst confirmation response.
Preferably, management control frame acknowledgement bit is also set in frame, for confirming without sequence number management control frame receiving one.
Preferably, length field can be set in frame, be used to indicate the total byte length of all fields between described length field and FCS field, that is, indicate the length sum of all FID block of information.
Each parameter definition in frame can reference table 1.
Table 1
The accepting state of confirmation response in order to indicate frame of described frame, comprises and receives and do not receive.
Below the trigger timing embodiment of the present invention being returned to frame acknowledgment response is described:
1, confirm immediately:
Mode 1: after receiving confirmation request immediately, return acknowledgement frame immediately.
Wherein, the described request of confirmation immediately can be the claim frame form that both sides appoint.Preferably, describedly confirm that request can be group acknowledge request, carries the mark of one or more Business Stream immediately, and the mark of one or more frame on each Business Stream, reply to indicate the confirmation of the designated frame returned immediately on specified services stream.After receiving described group acknowledge request, return the confirmation response of the designated frame on named data stream immediately.
The described request of confirmation immediately also can be the indicating bit that both sides appoint.Such as, a certain field in appointment data frame is for confirm indicating bit immediately.When resolution data frame, confirm instruction immediately if parsed from Frame, then return acknowledgement frame immediately.
Preferably, arrange described in immediately confirm instruction be carried in the frame head of Frame.
Returning acknowledgement frame immediately described in the embodiment of the present invention, is return in the next time cycle.
In the embodiment of the present invention, central access point (CAP) and website (STA) can transmitting terminal and receiving terminals each other.Wherein, CAP is for the STA of access provides the entity of access services; STA has medium education (MAC) and physical layer (PHY) functional interface, the terminal equipment that can communicate with CAP.Transmitting-receiving both-end is communicated by physical frame, and each physical frame cycle comprises downstream cycle and upward cycle successively: CAP sends data at downstream cycle to STA; STA sends data at upward cycle to CAP.In the embodiment of the present invention, when instruction opposite end returns acknowledgement frame immediately, indicated returns duration immediately, i.e. the next time cycle, refer to that the ascending physical signal frame period corresponds to the downlink physical frame period, or the downlink physical frame period corresponds to the upward cycle of a upper physical frame.Specifically, when transmitting terminal is CAP, be when carrying the Frame confirming immediately to indicate described in the downlink physical cycle of this frame sends, the described instruction of confirmation is immediately used to indicate STA and returns frame acknowledgment response in the ascending physical signal cycle of this frame; When transmitting terminal is STA, be send in the ascending physical signal cycle of this frame the Frame carrying and confirm immediately to indicate, the described instruction of confirmation is immediately used to indicate CAP and returns frame acknowledgment response in the downlink physical cycle of next frame.
2, delayed acknowledgement:
When not receiving confirmation request immediately, can think that the confirmation allowing opposite end to postpone to return frame is replied.
In the embodiment of the present invention, the indicating bit that both sides appoint, dominant indication lag confirms.Such as, a certain field in appointment data frame is delayed acknowledgement indicating bit.Interval is determined by transmitting terminal to use the frame acknowledgment of delayed acknowledgement to wait for, can send when available free resource.When resolution data frame, if parse delayed acknowledgement instruction from Frame, then return acknowledgement frame when available free resource.
Second embodiment
For management control frame, do not have the unicast management control frame of corresponding response frame to need to use ACK or group acknowledge frame (GroupAck) to confirm, otherwise directly confirm with corresponding response frame.
The embodiment of the present invention additionally provides the response frame of some management frames claim frames and correspondence thereof, as shown in table 2.Certainly, in another embodiment, can also arrange the response of other management claim frames and correspondence thereof as required, the present invention does not limit at this.
Table 2
All Non-Broadcast Multicast Access management control frame (except random access request response frame and independent resource claim frame) all need to send acknowledgement frame or implicit confirmation.Implicit confirmation refers to the acknowledgement frame for there being the unicast management control frame of corresponding response frame response frame can be used as this frame.Non-Broadcast Multicast Access management control frame does not need to confirm immediately, and response frame can be made and responding in the greatest physical frame number allowed afterwards.The response frame that CAP sends can not receive the acknowledgement frame of STA, and can not reach default this response frame of the front re-transmission of maximum retransmission, after number of retransmissions exceedes described default maximum retransmission, transmitting terminal will abandon this frame.
Frame uses confirmation and delayed acknowledgement immediately to be determined by transmitting terminal.Receiving terminal can indicate whether to need to confirm immediately according to the field of the instruction frame acknowledgment mode arranged in MAC head.The frame acknowledgment confirmed immediately is used to wait for that interval is a time cycle.Interval is determined by transmitting terminal to use the frame acknowledgment of delayed acknowledgement to wait for.
If when validation testing is for confirming immediately, do not receive acknowledgement frame in the next time cycle, then can retransmit this Frame before not reaching default maximum retransmission, after number of retransmissions exceedes described default maximum retransmission, transmitting terminal will abandon this frame.Here the next time cycle said can correspond to the downlink physical frame period in the ascending physical signal frame period, also can be the upward cycle downlink physical frame period corresponding to a upper physical frame.That is, when carrying the Frame confirming immediately to indicate described in the downlink physical cycle of this frame sends, the described instruction of confirmation is immediately used to indicate and returns frame acknowledgment response in the ascending physical signal cycle of this frame; When the ascending physical signal cycle of this frame sends the Frame carrying and confirm immediately to indicate, the described instruction of confirmation is immediately used to indicate and returns frame acknowledgment response in the downlink physical cycle of next frame.When MPDU retransmits, sequence number and burst number remain unchanged.
If when validation testing is delayed acknowledgement, acknowledgement frame is not received in the wait interval that transmitting terminal is arranged, then can retransmit this Frame before not reaching default maximum retransmission, after number of retransmissions exceedes described default maximum retransmission, transmitting terminal will abandon this frame.
ACK frame and GroupAck frame, no longer need other frames to confirm.
For the Frame of burst and non-burst, any one mode of ACK or GroupAck can be used to confirm.
The embodiment of the present invention additionally provides another kind of frame acknowledgment mode (ACK frame), is applicable to confirm for single frames.In order to illustrate more intuitively, the embodiment of the present invention additionally provides a kind of form of concrete acknowledgement frame, as shown in Figure 3.Acknowledgement frame shown in Fig. 3 comprises frame head, frame and frame check information (FCS).Frame control information is comprised, such as frame type (management frames or Frame), subtype (concrete management frame, or concrete data frame type), version information etc. in frame head; FID, burst number (FSN) is comprised, number of frames (SN) in frame.Each parameter definition in frame can reference table 3.
Table 3
3rd embodiment
Embodiments provide a kind of method of re-transmission, as shown in Figure 4, comprise step:
Step S401: the frame that buffer memory has sent;
Step S402: receive and parse for frame confirmation response;
Step S403: the frame retransmitting reception unconfirmed in the frame of buffer memory.
The repeating method that the embodiment of the present invention provides is safeguarded the data retransmitted by transmitting terminal, when retransmitting, only retransmitting the frame of reception unconfirmed, no longer retransmitting the frame received.Especially, when according to preset window data retransmission, allow the frame acknowledged receipt of in window not retransmit, greatly saved transfer resource.
Preferably, the frame having confirmed to receive can be deleted in the frame of buffer memory.Thus effectively save local cache resource.
Preferably, one or more continuous print frame can be encapsulated as framing (G-MPDU) to send.As shown in Figure 5, G-MPDU is made up of a series of G-MPDU subframe.As shown in Figure 6, G-MPDU subframe comprises G-MPDU delimiter, MPDU and possible byte of padding.Except last G-MPDU subframe, each G-MPDU subframe needs increase by 0 ~ 1 byte of padding, makes the length of each G-MPDU subframe be the integral multiple of 2 bytes.Shown in G-MPDU delimiter be used for locating the MPDU unit of G-MPDU.Be packaged together by multiple frame and send, when transmitting on the physical channel, what perform a frame (framing) synchronously can get multiple frame, thus effective saving physical transfer resource.
The frame acknowledgment response received in step S402 can be the group acknowledge response adopting embodiment one to provide, and also can be the confirmation response of the single frames that embodiment two provides.
4th embodiment
For the consideration to caching capabilities, cause makeing mistakes to prevent exceeding caching capabilities, the embodiment of the present invention additionally provides a kind of method for retransmitting, increase and the caching capabilities of local terminal is monitored, detect caching capabilities may exist exceed risk time, timely notice opposite end returns response immediately, specifically as shown in Figure 7, comprises step:
Step S701: buffer memory does not receive the frame confirming response;
Step S701: judge whether to reach buffer memory capacity threshold value;
Step S701: when reaching buffer memory capacity threshold value, sends and confirms request immediately, returns frame acknowledgment response immediately to indicate.
Preferably, describedly confirm that the mark of one or more Business Stream is carried in request immediately, and the mark of one or more frame on each Business Stream, reply to indicate the confirmation of the designated frame returned immediately on named data stream.
Preferably, the described sequence number confirming to ask to carry the first frame each Business Stream needing to return response immediately, with the confirmation response indicating opposite end to return the frame on described Business Stream from described first frame.
In order to illustrate more intuitively, the embodiment of the present invention additionally provides a kind of frame format confirming to ask immediately specifically, as shown in Figure 8.The claim frame of confirmation immediately shown in Fig. 8 comprises frame head, frame and frame check information (FCS).Frame control information is comprised, such as frame type (management frames or Frame), subtype (concrete management frame, or concrete data frame type), version information etc. in frame head; One or more FID block of information is comprised in frame, each FID block of information comprises traffic stream identifier FID and sequence number, described sequence number is sequence number business needing return the first frame confirming response, return from described first frame to indicate opposite end and confirm response, the sequence number of the frame corresponding with the first bit of bitmap in the group acknowledge provided in embodiment one is corresponding.In frame, each parameter definition can reference table 4.
Table 4
Preferably, the embodiment of the present invention additionally provides the another kind of mode realizing confirming immediately to ask: by confirming that instruction is carried in Frame, goes out with dataframe immediately, confirms request immediately to send; Described confirm immediately instruction, be used to indicate return immediately frame acknowledgment response.
Preferably, can be carried on confirming immediately to indicate in the frame head of Frame.
Wherein, the described frame acknowledgment that returns immediately is replied, and is return the response of described group acknowledge in the next time cycle.The described next time cycle refers to that the ascending physical signal frame period corresponds to the downlink physical frame period, or the downlink physical frame period corresponds to the upward cycle of a upper physical frame.That is, when carrying the Frame confirming immediately to indicate described in the downlink physical cycle of this frame sends, the described instruction of confirmation is immediately used to indicate opposite end and returns frame acknowledgment response in the ascending physical signal cycle of this frame; When the ascending physical signal cycle of this frame sends the Frame carrying and confirm immediately to indicate, the described instruction of confirmation is immediately used to indicate opposite end and returns frame acknowledgment response in the downlink physical cycle of next frame.
Preferably, delayed acknowledgement instruction when not reaching buffer memory capacity threshold value, can also be carried in Frame, going out with dataframe by the embodiment of the present invention.Described delayed acknowledgement instruction, is used to indicate the confirmation response allowing to postpone to return all unacknowledged data frames on each Business Stream.Opposite end, when resolution data frame, if parse delayed acknowledgement instruction from Frame, then returns all unacknowledged frame acknowledgment responses on each Business Stream when available free resource.
The embodiment of the present invention additionally provides a kind of frame acknowledgment and sends the selection on opportunity, and central access point (CAP) and website (STA) can transmitting terminal and receiving terminals each other, specifically comprise:
If 1 CAP sends management control frame (needing to confirm), to STA, then CAP needs for acknowledgement frame reserves resource when scheduling of upstream transmissions resource, ensures that STA has an opportunity acknowledgement frame successfully to send.
If 2 CAP send G-MPDU to STA, and confirmed immediately by the field instruction STA being used to indicate frame acknowledgment mode, then CAP needs when scheduling of upstream transmissions resource for GroupAck frame or ACK frame reserve resource.
If 3 CAP send aggregate data frame to STA, and allow STA delayed response by the field instruction being used to indicate frame acknowledgment mode, then namely GroupAck frame initiatively can return when uplink transmission resource has residue by STA, also can return GroupAck frame again by wait-receiving mode after the confirmation immediately that CAP sends notifies.
If 4 STA send management control frame (needing to confirm), to CAP, then CAP should confirm in the downlink physical cycle of next frame.
If 5 STA send G-MPDU to CAP, and confirmed immediately by the field instruction CAP being used to indicate frame acknowledgment mode, then CAP sends GroupAck frame or ACK frame in the downlink physical cycle of next frame.
If 6 STA send aggregate data frame to CAP, and allow CAP delayed response by the field instruction being used to indicate frame acknowledgment mode, then namely GroupAck frame initiatively can return when downlink transfer resource has residue by CAP, also can return GroupAck frame again by wait-receiving mode after the confirmation immediately that STA sends notifies.
5th embodiment
In order to realize embodiment of the present invention frame acknowledgment method, the present invention also proposes a kind of device for frame acknowledgment, as shown in Figure 9, comprising:
Package module 901, for being encapsulated as group acknowledge response by the confirmation of one or more frame response;
Sending module 902, for sending the response of described group acknowledge.
Preferably, described package module 901, confirms response for the confirmation of one or more frame on same Business Stream response is encapsulated as Business Stream; Business Stream described in one or more is confirmed response is encapsulated as group acknowledge response.
Preferably, described package module 901, confirm the frame head, frame and the FCS that reply: one or more FID block of information is set in frame for package group, described Business Stream confirms that response comprises traffic stream identifier, sequence number and bitmap bitmap, wherein said bitmap is for carrying the confirmation response of the multiple frame of continuous print, the confirmation response of each the corresponding frame in bitmap, described sequence number is used to indicate the sequence number of the frame that first bit is corresponding in described bitmap.
Preferably, described package module 901, for arranging each FID block of information according to the length of bitmap; The length of described bitmap is not fixed.
Preferably, described package module 901, also arranges the length field of bitmap, is used to indicate the length of bitmap in described FID block of information.
Preferably, described package module 901, also arranges burst indication information in described FID block of information, with indicate carry in described bitmap be the frame of burst confirmation response, or the frame of non-burst confirmation response.
Preferably, described package module 901, also arranges management control frame acknowledgement bit in group acknowledge response, for confirming without sequence number management control frame receiving one.
Preferably, described package module 901, also arranges length field in frame, is used to indicate the length sum of all FID block of information.
Preferably, the accepting state of confirmation response in order to indicate frame of described frame, comprises and receives and do not receive.
Preferably, also comprise:
First control module 904, confirms request immediately for receiving, and controls described package module 901 package group according to this and confirm response, and controls described sending module 902 and send the response of packaged group acknowledge immediately.
Preferably, describedly confirm that the mark of one or more Business Stream is carried in request immediately, and the mark of one or more frame on each Business Stream; According to described, described first control module 904, confirms that the confirmation of the designated frame on named data stream response is encapsulated as group acknowledge response by package module 901 described in Request Control immediately.
Preferably, describedly sending immediately, is return the response of described group acknowledge in the next time cycle.The described next time cycle refers to that the ascending physical signal frame period corresponds to the downlink physical frame period, or the downlink physical frame period corresponds to the upward cycle of a upper physical frame.That is, described first control module 904, when confirming request described in receiving from the downlink physical cycle of this frame immediately, controlling described sending module 902 and sending packaged group acknowledge response in the ascending physical signal cycle of this frame; When confirming request described in receiving from the ascending physical signal cycle of this frame immediately, controlling described sending module 902 and sending packaged group acknowledge response in the downlink physical cycle of next frame.
Preferably, also comprise:
Second control module 904, for receiving the Frame carrying and confirm immediately to indicate, according to confirming that instruction controls described package module 901 package group and confirms response immediately, and controls described sending module 902 and sends packaged group acknowledge response immediately.
Preferably, described second control module 904, is encapsulated as group acknowledge response for controlling described package module 901 by the confirmation of unacknowledged frames all on each Business Stream response, and controls described sending module 902 and send the response of packaged group acknowledge immediately.
Preferably, described second control module 904, by the frame head of resolution data frame, confirms instruction immediately described in acquisition.
Preferably, describedly sending immediately, is return the response of described group acknowledge in the next time cycle; The described next time cycle refers to that the ascending physical signal frame period corresponds to the downlink physical frame period, or the downlink physical frame period corresponds to the upward cycle of a upper physical frame.That is, described second control module 904, when receiving the Frame carrying and confirm immediately to indicate from the downlink physical cycle of this frame, controls described sending module 902 and sends packaged group acknowledge response in the ascending physical signal cycle of this frame; When receiving the Frame carrying and confirm immediately to indicate from the ascending physical signal cycle of this frame, control described sending module 902 and send packaged group acknowledge response in the downlink physical cycle of next frame.
Preferably, also comprise:
3rd control module 905, for receiving the Frame carrying delayed acknowledgement instruction, according to delayed acknowledgement instruction when available free resource, control described package module 901 package group and confirm response, and control described sending module 902 and send packaged group acknowledge response.
6th embodiment
In order to realize embodiment of the present invention frame acknowledgment method, the present invention also proposes the another kind of device for frame acknowledgment, as shown in Figure 10, comprising:
Package module 1001, for generating group acknowledge request, carries the mark mark of one or more Business Stream and each Business Stream needing the frame confirmed in described group acknowledge request;
Sending module 1002, for sending described group acknowledge request.
Preferably, package module 1001, confirms claim frame, to generate described group acknowledge request for package group;
Described group acknowledge request comprises frame head, frame and FCS, described frame comprises one or more FID block of information, each FID block of information comprises traffic stream identifier FID and sequence number, on described Business Stream, need the sequence number of the first frame of replying on described Business Stream, need the mark of the frame confirmed, indicate and return frame acknowledgment from described first frame.
Preferably, described package module 1001, also arranges FID digital section in group acknowledge request, is used to indicate the number of the FID block of information comprised in frame.
Preferably, described group acknowledge request is used to indicate the confirmation response of the designated frame returned immediately on named data stream.
Preferably, the described group acknowledge that returns immediately is replied, and is return the response of described group acknowledge in the next time cycle;
The described next time cycle refers to that the ascending physical signal frame period corresponds to the downlink physical frame period, or the downlink physical frame period corresponds to the upward cycle of a upper physical frame.That is, if described sending module 1002 sends group acknowledge request in the downlink physical cycle of this frame, then confirm described in that instruction is used to indicate immediately and return frame acknowledgment response in the ascending physical signal cycle of this frame; If described sending module 1002 sends group acknowledge request in the ascending physical signal cycle of this frame, then confirm described in that instruction is used to indicate immediately and return frame acknowledgment response in the downlink physical cycle of next frame.
According to described disclosed embodiment, those skilled in the art can be made can to realize or use the present invention.To those skilled in the art, the various amendments of these embodiments are apparent, and the general principles defined here also can be applied to other embodiments not departing from the scope of the present invention on the basis with purport.Above-described embodiment is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, and any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. for a method for frame acknowledgment, it is characterized in that, comprising:
The confirmation of one or more frame response is encapsulated as group acknowledge response;
Send the response of described group acknowledge;
Wherein, the confirmation of one or more frame on same Business Stream response is encapsulated as Business Stream and confirms response; One or more Business Stream is confirmed response is encapsulated as group acknowledge response;
Wherein, package group confirms frame head, frame and the frame check information FCS of response;
One or more FID block of information is set in frame, described FID block of information comprises traffic stream identifier, sequence number and bitmap bitmap, wherein said bitmap is for carrying the confirmation response of the multiple frame of continuous print, the confirmation response of each the corresponding frame in bitmap, described sequence number is used to indicate the sequence number of the frame that first bit is corresponding in described bitmap;
Wherein, receiving confirmation request immediately or after confirming instruction immediately, returning the response of described group acknowledge immediately;
Wherein, when the downlink physical cycle of this frame receives confirmation request immediately or confirms instruction immediately, group acknowledge response is returned in the ascending physical signal cycle of this frame; When the ascending physical signal cycle of this frame receives confirmation request immediately or confirms instruction immediately, return group acknowledge response in the downlink physical cycle of next frame.
2. the method for claim 1, is characterized in that:
According to the length of bitmap, each FID block of information is set; The length of described bitmap is not fixed; And/or
The length field of bitmap is set in described FID block of information, is used to indicate the length of bitmap; And/or
Length field is set in frame, is used to indicate the length sum of all FID block of information; And/or
In described FID block of information, burst indication information is set, with indicate carry in described bitmap be the frame of burst confirmation response, or the frame of non-burst confirmation response; And/or
Management control frame acknowledgement bit is set in frame, for confirming without sequence number management control frame receiving one.
3. method as claimed in claim 1 or 2, is characterized in that:
Describedly confirm that the mark of one or more Business Stream is carried in request immediately, and the mark of one or more frame on each Business Stream;
The confirmation response that request returns the designated frame on named data stream is immediately confirmed immediately according to described.
4. method as claimed in claim 1 or 2, is characterized in that:
Resolve the frame head of described Frame, therefrom obtain and confirm instruction immediately.
5. method as claimed in claim 1 or 2, is characterized in that:
When resolution data frame, if parse delayed acknowledgement instruction from Frame, then return the response of described group acknowledge when available free resource.
6. for a device for frame acknowledgment, it is characterized in that, comprising:
Package module, for being encapsulated as group acknowledge response by the confirmation of one or more frame response;
Sending module, for sending the response of described group acknowledge;
Wherein, described package module, confirms response for the confirmation of one or more frame on same Business Stream response is encapsulated as Business Stream; Business Stream described in one or more is confirmed response is encapsulated as group acknowledge response;
Wherein, described package module, confirm the frame head, frame and the FCS that reply: one or more FID block of information is set in frame for package group, described Business Stream confirms that response comprises traffic stream identifier, sequence number and bitmap bitmap, wherein said bitmap is for carrying the confirmation response of the multiple frame of continuous print, the confirmation response of each the corresponding frame in bitmap, described sequence number is used to indicate the sequence number of the frame that first bit is corresponding in described bitmap;
Control module, confirms request immediately for receiving or confirms instruction immediately, and controls described package module package group according to this and confirm response, and controls described sending module and send the response of packaged group acknowledge immediately;
Described control module, when confirming request described in receiving from the downlink physical cycle of this frame immediately, controlling described sending module and sending packaged group acknowledge response in the ascending physical signal cycle of this frame; When confirming request described in receiving from the ascending physical signal cycle of this frame immediately, controlling described sending module and sending packaged group acknowledge response in the downlink physical cycle of next frame.
7. device as claimed in claim 6, is characterized in that:
Described package module, for arranging each FID block of information according to the length of bitmap; The length of described bitmap is not fixed; And/or
Described package module, also arranges the length field of bitmap, is used to indicate the length of bitmap in described FID block of information; And/or
Described package module, also arranges length field in frame, is used to indicate the length sum of all FID block of information; And/or
Described package module, also arranges burst indication information in described FID block of information, with indicate carry in described bitmap be the frame of burst confirmation response, or the frame of non-burst confirmation response; And/or
Described package module, also arranges management control frame acknowledgement bit in group acknowledge response, for confirming without sequence number management control frame receiving one.
8. device as claimed in claims 6 or 7, is characterized in that:
Describedly confirm that the mark of one or more Business Stream is carried in request immediately, and the mark of one or more frame on each Business Stream;
According to described, described control module, confirms that the confirmation of the designated frame on named data stream response is encapsulated as group acknowledge response by package module described in Request Control immediately.
9. device as claimed in claims 6 or 7, is characterized in that:
Described control module, by the frame head of resolution data frame, confirms instruction immediately described in acquisition.
10. device as claimed in claims 6 or 7, is characterized in that, also comprise:
Control module, for receiving the Frame carrying delayed acknowledgement instruction, according to delayed acknowledgement instruction when available free resource, controlling described package module package group and confirming response, and controls described sending module and send packaged group acknowledge response.
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| CN201280013095.XA CN103548316B (en) | 2011-03-31 | 2012-03-23 | A kind of method and apparatus for frame acknowledgment |
| CN201510864249.1A CN105429737B (en) | 2012-03-23 | 2012-03-23 | A kind of method and apparatus for frame acknowledgment |
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| CN201280013095.XA Division CN103548316B (en) | 2011-03-31 | 2012-03-23 | A kind of method and apparatus for frame acknowledgment |
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| CN201510860923.9A Pending CN105450362A (en) | 2012-03-23 | 2012-03-23 | Frame acknowledgment method and device |
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| CN106685604A (en) * | 2016-11-28 | 2017-05-17 | 北京新岸线移动通信技术有限公司 | Data transmission control method, system and device |
| CN107276728B (en) * | 2017-06-12 | 2019-05-31 | 北京三快在线科技有限公司 | A kind of data transmission method and device |
| CN113497639B (en) * | 2020-04-01 | 2022-09-02 | 华为技术有限公司 | Communication method, device, system and storage medium for power line communication system |
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| CN105429737B (en) | 2019-04-30 |
| CN105450362A (en) | 2016-03-30 |
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