CN102711228A - Data communication device and method - Google Patents

Data communication device and method Download PDF

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Publication number
CN102711228A
CN102711228A CN2012101992221A CN201210199222A CN102711228A CN 102711228 A CN102711228 A CN 102711228A CN 2012101992221 A CN2012101992221 A CN 2012101992221A CN 201210199222 A CN201210199222 A CN 201210199222A CN 102711228 A CN102711228 A CN 102711228A
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frame
indicating bit
data
value
communication equipment
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CN102711228B (en
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董贤东
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Priority to CN201210199222.1A priority Critical patent/CN102711228B/en
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Priority to PCT/CN2013/077053 priority patent/WO2013185588A1/en
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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
    • 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
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a data communication device and a data communication method. The device comprises a business processing module and a wireless transceiver module, wherein the business processing module is used for generating a first data frame, transmitting the first data frame through the wireless transceiver module and receiving a confirmation message frame of the first data frame; the confirmation message frame of the first data frame is a short confirmation message frame; the short confirmation message frame comprises an indicating bit of a second data frame; when the value of the indicating bit of the second data frame is equal to a first value, the receiver of the first data frame caches the second data frame for the data communication device; and the wireless transceiver module is used for interacting data with the outside of the data communication device. By the device and the method, a terminal can be ensured to acquire whether an opposite terminal caches the data for the terminal without blind transmission of a query message to the opposite terminal, so that a network busy condition can be prevented, and electricity conservation of the terminal is facilitated.

Description

Data communication equipment and method
Technical field
The present invention relates to communication technical field, in particular to data communication equipment and data communications method.
Background technology
In IEEE (IEEE-USA) 802.11, set up the new 11ah of project team, the main feature of 11ah is a low speed, wide coverage, radius is 1km, the STA quantity (station, terminal/website) that AP supports is many, is approximately 6000.It is mainly used in sensing network and intelligence instrument, for example: intelligent electric meter and intellectual water meter.For intelligence instrument STA, they and AP (Access Point, access point) communication cycle are very long, the reported data of maybe a day communicating by letter with AP and downlink data is seldom arranged.
In existing 802.11 standards; The method that STA obtains downlink data is TIM (the traffic indication map that periodically intercepts in AP broadcasting Beacon (beacon) frame; Data indication tabulation); Detect whether corresponding with it position is 1, if be the downlink data that 1 expression AP has buffer memory, transmission PS (power save)-Poll (power-save poll frame) that STA can compete in CP (competition phase) obtains downlink data to AP.The vector lists that TIM tabulates and forms by 0 and 1; In existing standard, come to 2007; For example: if AID (the association identifier that AP distributes for a STA; Association identification) be 1 and promising this STA data in buffer of AP, the TIM vector lists just can be
Figure BDA00001772715900011
so
But in 11ah, AP will support about 6000 STA; The length of TIM tabulation is exactly 6000 bits so, for the AP of low speed, if speed is 1Mbps; The time of transmitting a TIM table so is unfavorable for the AP power saving so just for 6ms, has also reduced the AP effective rate of utilization simultaneously.For intelligence instrument STA, they seldom have downlink data in addition, possibly only need to send a upstream data in and give AP, that is to say nearly all to intercept the Beacon frame in dormancy if periodically revive, and electric weight that so maybe labor is unfavorable for the STA power saving.So, in 802.11, proposing for intelligence instrument STA, they do not need the TIM signaling, and they obtain downlink data and can obtain through the mode of the competition transmission PS-poll that oneself revives.
Relatively more existing standard and 11ah can know in existing standard, all STA know through TIM whether downlink data is arranged, and then send ps-poll and obtain downlink data to AP; And in this piece manuscript; There is not the STA of TIM signaling for these; The back of reviving obtains downlink data through the mode of sending PS-Poll, that is to say that it is blindly that these STA send the PS-Poll frame, just in order to inquire the whether downlink data of promising its buffer memory of AP.If STA transmission PS-Poll frame blindly, and AP not have be the downlink data of this STA buffer memory so just means that the current PS-Poll frame of transmission wastes, be unfavorable for the STA power saving; If a plurality of STA blindly send the PS-Poll frame, cause whole network extremely busy so, reduced the network effective rate of utilization.
Therefore, need a kind of new technical scheme, can guarantee that the terminal does not need to send blindly apply for information and gives the other side, promptly know the other side's data that whether have been its buffer memory, can not cause network busy, and help the terminal power saving.
Summary of the invention
Technical problem to be solved by this invention is, a kind of new technical scheme is provided, and can guarantee that STA does not need to send blindly apply for information and gives the other side, promptly knows the other side's data that whether have been its buffer memory, can not cause network busy, and help the STA power saving.
In view of this; The present invention provides a kind of data communication equipment; Comprise: Service Processing Module; Generate first Frame and send said first Frame through radio receiving transmitting module, and the affirmation message frame that receives said first Frame, the affirmation message frame of said first Frame is short acknowledge message frame; Comprise the second Frame indicating bit in the described short acknowledge message frame, the recipient who representes said first Frame when value of the said second Frame indicating bit is first value for said data communication equipment buffer memory second Frame; Said radio receiving transmitting module is used for and the outside interaction data of said data communication equipment.In this technical scheme; Data communication equipment can be equipment such as mobile phone, panel computer, notebook computer; Service Processing Module is equivalent to handle the chip of wireless local network service, and radio receiving transmitting module is equivalent to the antenna of transmitting/receiving wireless local area network signal, can be used as STA and sends upstream data to behind the AP; Whether be its buffer memory downlink data, do not need to know through blindly sending PS-Poll according to the Short ACK that returns (short affirmation) message if can judge AP; Or send data to other terminal, according to the Short ACK that other terminal is returned, whether be its buffer memory desired data, equally also do not need to send out message authentication separately if can judge other terminal, avoid causing network busy, helps the terminal power saving.
In technique scheme, preferably, the said second Frame indicating bit comprises the one or more positions in the physics frame head of said short acknowledge message frame.In this technical scheme, can utilize the physics frame head of Short ACK to identify.
In technique scheme, preferably, the said second Frame indicating bit comprises the one or more positions in the signal domain in the said physics frame head of said short acknowledge message frame.In this technical scheme, show SIG (signal) territory that can play the sign effect, it will be appreciated by those skilled in the art that to be merely example here that other position equally maybe be as the second Frame indicating bit.
In technique scheme, preferably, when being second value, the value of the said second Frame indicating bit representes that the recipient of said first Frame is not said second Frame of said data communication equipment buffer memory, said data communication equipment can dormancy.In this technical scheme, the terminal can definite network in AP or other terminal data that whether have been its buffer memory, if judge do not have, the terminal can dormancy.
In technique scheme; Preferably, said Service Processing Module is before sending said first Frame, with said recipient's negotiation communication time; And sending said first Frame at said call duration time, said call duration time is positioned at non-competing phase or competition phase.In this technical scheme, in advance the negotiation communication time, can avoid the time that selecting network is busy or other terminate load of AP/ is too high to send upstream data, cause other terminal of AP/ in time not respond.
In technique scheme, preferably, said Service Processing Module carries out dormancy after consulting said call duration time with said recipient, and revives at said call duration time, to send said first Frame.In this technical scheme, when not needing data interaction, keep dormancy to help saving electric weight.
In technique scheme, preferably, when said Service Processing Module is said first value in the value of the said second Frame indicating bit, sends the power-save poll frame through said radio receiving transmitting module, and receive said second Frame from said recipient.In this technical scheme, when the data of having confirmed the other side's buffer memory, then normally send PS-Poll, obtain this data.
The present invention also provides a kind of data communications method, comprising: generate first Frame; Send said first Frame; Receive the affirmation message frame of said first Frame; The affirmation message frame of said first Frame is short acknowledge message frame; Comprise the second Frame indicating bit in the said short acknowledge message frame, the recipient who representes said first Frame when value of the said second Frame indicating bit is first value for the transmit leg buffer memory second Frame.In this technical scheme, upstream data is sent to behind the AP in the terminal, and whether be its buffer memory downlink data, do not need to know through blindly sending PS-Poll if can judge AP according to the Short ACK that returns (short affirmation) message; Or send data to other terminal, according to the Short ACK that other terminal is returned, whether be its buffer memory desired data, equally also do not need to send out message authentication separately if can judge other terminal, avoid causing network busy, helps the terminal power saving.
In technique scheme, preferably, the said second Frame indicating bit comprises the one or more positions in the physics frame head of said short acknowledge message frame.In this technical scheme, can utilize the physics frame head of Short ACK to identify.
In technique scheme, preferably, the said second Frame indicating bit comprises the one or more positions in the signal domain in the said physics frame head of said short acknowledge message frame.In this technical scheme, show SIG (signal) territory that can play the sign effect, it will be appreciated by those skilled in the art that to be merely example here that other position equally maybe be as the second Frame indicating bit.
In technique scheme, preferably, when being second value, the value of the said second Frame indicating bit representes that said recipient is not said second Frame of said transmit leg buffer memory, said transmit leg can dormancy.In this technical scheme, the terminal can definite network in AP or other terminal data that whether have been its buffer memory, if judge do not have, the terminal can dormancy.
In technique scheme, preferably, also comprise: before sending said first Frame, with said recipient's negotiation communication time, and send said first Frame at said call duration time, said call duration time is positioned at non-competing phase or competition phase.In this technical scheme, in advance the negotiation communication time, can avoid the time that selecting network is busy or other terminate load of AP/ is too high to send upstream data, cause other terminal of AP/ in time not respond.
In technique scheme, preferably, also comprise: after consulting said call duration time, carry out dormancy, and revive, to send said first Frame at said call duration time with said recipient.In this technical scheme, when not needing data interaction, keep dormancy to help saving electric weight.
In technique scheme, preferably, also comprise: when the value of the said second Frame indicating bit is said first value, sends the power-save poll frame, and receive said second Frame from said recipient.In this technical scheme, when the data of having confirmed the other side's buffer memory, then normally send PS-Poll, obtain this data.
The present invention also provides a kind of data communication equipment; Comprise: Service Processing Module; Receive first Frame through radio receiving transmitting module, generate and send the affirmation message frame of said first Frame, the affirmation message frame of said first Frame is short acknowledge message frame; Comprise the second Frame indicating bit in the said short acknowledge message frame, represent when the value of the said second Frame indicating bit is first value said data communication equipment be said first Frame the transmit leg buffer memory second Frame; Said radio receiving transmitting module is used for and the outside interaction data of said data communication equipment.In this technical scheme, data communication equipment can be equipment such as router, mobile phone, panel computer, notebook computer, and Service Processing Module is equivalent to handle the chip of wireless local network service; Radio receiving transmitting module is equivalent to the antenna of transmitting/receiving wireless local area network signal, can be used as the AP of wireless network, after receiving upstream data; Can be through Short ACK notice STA promising its buffer memory downlink data whether; Also can be used as the terminal and data interaction is carried out at other terminal, whether promising its prepared data to notify other terminal, avoids the other side's message of need redispatching to confirm; Avoid causing network busy, help the terminal power saving.
In technique scheme, preferably, the said second Frame indicating bit comprises the one or more positions in the physics frame head of said short acknowledge message frame.In this technical scheme, can utilize the physics frame head of Short ACK to identify.
In technique scheme, preferably, the said second Frame indicating bit comprises the one or more positions in the signal domain in the said physics frame head of said short acknowledge message frame.In this technical scheme, show SIG (signal) territory that can play the sign effect, it will be appreciated by those skilled in the art that to be merely example here that other position equally maybe be as the second Frame indicating bit.
In technique scheme, preferably, when being second value, the value of the said second Frame indicating bit representes that said data communication equipment is not said second Frame of said transmit leg buffer memory, said transmit leg can dormancy.In this technical scheme, can clearly notify whether be data interaction the opposing party's buffer memory data.
In technique scheme; Preferably, said Service Processing Module is before receiving said first Frame, with the said transmit leg negotiation communication time; And receiving said first Frame at said call duration time, said call duration time is positioned at non-competing phase or competition phase.In this technical scheme, in advance the negotiation communication time, can avoid the time that selecting network is busy or other terminate load of AP/ is too high to send upstream data, cause other terminal of AP/ in time not respond.
In technique scheme, preferably, said Service Processing Module also receives the power-save poll frame of said transmit leg through said radio receiving transmitting module, and sends said second Frame to said transmit leg.In this technical scheme,, then send to the other side with data cached at the opposing party's who receives data interaction PS-Poll frame.
The present invention also provides a kind of data communications method, comprising: receive first Frame; Generate and send the affirmation message frame of said first Frame; The affirmation message frame of said first Frame is short acknowledge message frame; Comprise the second Frame indicating bit in the said short acknowledge message frame, the recipient who representes first Frame when value of the said second Frame indicating bit is first value for the transmit leg buffer memory said second Frame.In this technical scheme, can be used as STA and send upstream data to behind the AP, whether be its buffer memory downlink data, do not need to know through blindly sending PS-Poll according to the Short ACK that returns (short affirmation) message if can judge AP; Or send data to other terminal, according to the Short ACK that other terminal is returned, whether be its buffer memory desired data, equally also do not need to send out message authentication separately if can judge other terminal, avoid causing network busy, helps the terminal power saving.
In technique scheme, preferably, the said second Frame indicating bit comprises the one or more positions in the physics frame head of said short acknowledge message frame.In this technical scheme, can utilize the physics frame head of Short ACK to identify.
In technique scheme, preferably, the said second Frame indicating bit comprises the one or more positions in the signal domain in the said physics frame head of said short acknowledge message frame.In this technical scheme, show SIG (signal) territory that can play the sign effect, it will be appreciated by those skilled in the art that to be merely example here that other position equally maybe be as the second Frame indicating bit.
In technique scheme, preferably, when being second value, the value of the said second Frame indicating bit representes that said recipient is not said transmit leg buffer memory second Frame, said transmit leg can dormancy.In this technical scheme, the terminal can definite network in AP or other terminal data that whether have been its buffer memory.
In technique scheme, preferably, also comprise: before receiving said first Frame, with the said transmit leg negotiation communication time, and receive said first Frame at said call duration time, said call duration time is positioned at non-competing phase or competition phase.In this technical scheme, in advance the negotiation communication time, can avoid the time that selecting network is busy or other terminate load of AP/ is too high to send upstream data, cause other terminal of AP/ in time not respond.
In technique scheme, preferably, also comprise: receive the power-save poll frame of said transmit leg, and send said second Frame to said transmit leg.In this technical scheme, when not needing data interaction, keep dormancy to help saving electric weight.
Through above technical scheme; Can realize data communication equipment and data communications method, can guarantee that the terminal does not need to send blindly apply for information and gives the other side, promptly know the other side's data that whether have been its buffer memory; Can not cause network busy, and help the terminal power saving.
Description of drawings
Fig. 1 is the block diagram of data communication equipment according to an embodiment of the invention;
Fig. 2 is the flow chart of data communications method according to an embodiment of the invention;
Fig. 3 is the block diagram of data communication equipment according to an embodiment of the invention;
Fig. 4 is the flow chart of data communications method according to an embodiment of the invention;
Fig. 5 is the workflow diagram of data communication equipment according to an embodiment of the invention;
Fig. 6 is the workflow diagram of data communication equipment according to an embodiment of the invention.
Fig. 7 is the structure chart of data communication equipment transmission data according to an embodiment of the invention.
Embodiment
In order more to be expressly understood above-mentioned purpose of the present invention, feature and advantage, the present invention is further described in detail below in conjunction with accompanying drawing and embodiment.Need to prove that under the situation of not conflicting, the application's embodiment and the characteristic among the embodiment can make up each other.
A lot of details have been set forth in the following description so that make much of the present invention; But; The present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention does not receive the restriction of following disclosed specific embodiment.
Fig. 1 is the block diagram of data communication equipment according to an embodiment of the invention.
As shown in Figure 1; The present invention provides a kind of data communication equipment 100; Comprise: Service Processing Module 102; Generate first Frame and send said first Frame through radio receiving transmitting module 104, and the affirmation message frame that receives said first Frame, the affirmation message frame of said first Frame is short acknowledge message frame; Comprise the second Frame indicating bit in the described short acknowledge message frame, the recipient who representes said first Frame when value of the said second Frame indicating bit is first value for said data communication equipment 100 buffer memorys second Frame; Said radio receiving transmitting module 104 is used for and said data communication equipment 100 outside interaction datas.In this technical scheme; Data communication equipment 100 can be equipment such as mobile phone, panel computer, notebook computer; Service Processing Module 102 is equivalent to handle the chip of wireless local network service, and radio receiving transmitting module 104 is equivalent to the antenna of transmitting/receiving wireless local area network signal, can be used as STA and sends upstream data to behind the AP; Whether be its buffer memory downlink data, do not need to know through blindly sending PS-Poll according to the Short ACK that returns (short affirmation) message if can judge AP; Or send data to other terminal, according to the Short ACK that other terminal is returned, whether be its buffer memory desired data, equally also do not need to send out message authentication separately if can judge other terminal, avoid causing network busy, helps the terminal power saving.
In technique scheme, the said second Frame indicating bit comprises the one or more positions in the physics frame head of said short acknowledge message frame.In this technical scheme, can utilize the physics frame head of Short ACK to identify.
In technique scheme, the said second Frame indicating bit comprises the one or more positions in the signal domain in the said physics frame head of said short acknowledge message frame.In this technical scheme, show SIG (signal) territory that can play the sign effect, it will be appreciated by those skilled in the art that to be merely example here that other position equally maybe be as the second Frame indicating bit.
In technique scheme, when being second value, the value of the said second Frame indicating bit representes that the recipient of said first Frame is not said second Frame of said data communication equipment 100 buffer memorys, said data communication equipment 100 can dormancy.In this technical scheme, the terminal can definite network in AP or other terminal data that whether have been its buffer memory, if judge do not have, the terminal can dormancy.
In technique scheme, said Service Processing Module 102 with said recipient's negotiation communication time, and sent said first Frame at said call duration time before sending said first Frame, and said call duration time is positioned at non-competing phase or competition phase.In this technical scheme, in advance the negotiation communication time, can avoid the time that selecting network is busy or other terminate load of AP/ is too high to send upstream data, cause other terminal of AP/ in time not respond.
In technique scheme, said Service Processing Module 102 carries out dormancy after consulting said call duration time with said recipient, and revives at said call duration time, to send said first Frame.In this technical scheme, when not needing data interaction, keep dormancy to help saving electric weight.
In technique scheme, when said Service Processing Module 102 is said first value in the value of the said second Frame indicating bit, sends the power-save poll frames through said radio receiving transmitting module 104, and receive said second Frame from said recipient.In this technical scheme, when the data of having confirmed the other side's buffer memory, then normally send PS-Poll, obtain this data.
Fig. 2 is the flow chart of data communications method according to an embodiment of the invention.
As shown in Figure 2, the present invention also provides a kind of data communications method, comprising: step 202 generates first Frame; Step 204 is sent said first Frame; Step 206; Receive the affirmation message frame of said first Frame; The affirmation message frame of said first Frame is short acknowledge message frame; Comprise the second Frame indicating bit in the said short acknowledge message frame, the recipient who representes said first Frame when value of the said second Frame indicating bit is first value for the transmit leg buffer memory second Frame.In this technical scheme, upstream data is sent to behind the AP in the terminal, and whether be its buffer memory downlink data, do not need to know through blindly sending PS-Poll if can judge AP according to the Short ACK that returns (short affirmation) message; Or send data to other terminal, according to the Short ACK that other terminal is returned, whether be its buffer memory desired data, equally also do not need to send out message authentication separately if can judge other terminal, avoid causing network busy, helps the terminal power saving.
In technique scheme, the said second Frame indicating bit comprises the one or more positions in the physics frame head of said short acknowledge message frame.In this technical scheme, can utilize the physics frame head of Short ACK to identify.
In technique scheme, the said second Frame indicating bit comprises the one or more positions in the signal domain in the said physics frame head of said short acknowledge message frame.In this technical scheme, show SIG (signal) territory that can play the sign effect, it will be appreciated by those skilled in the art that to be merely example here that other position equally maybe be as the second Frame indicating bit.
In technique scheme, when being second value, the value of the said second Frame indicating bit representes that said recipient is not said second Frame of said transmit leg buffer memory, said transmit leg can dormancy.In this technical scheme, the terminal can definite network in AP or other terminal data that whether have been its buffer memory, if judge do not have, the terminal can dormancy.
In technique scheme, before said step 202, also comprise: with said recipient's negotiation communication time, and send said first Frame at said call duration time, said call duration time is positioned at non-competing phase or competition phase.In this technical scheme, in advance the negotiation communication time, can avoid the time that selecting network is busy or other terminate load of AP/ is too high to send upstream data, cause other terminal of AP/ in time not respond.
In technique scheme, also comprise: after consulting said call duration time, carry out dormancy, and revive, to send said first Frame at said call duration time with said recipient.In this technical scheme, when not needing data interaction, keep dormancy to help saving electric weight.
In technique scheme, also comprise: when the value of the said second Frame indicating bit is said first value, sends the power-save poll frame, and receive said second Frame from said recipient.In this technical scheme, when the data of having confirmed the other side's buffer memory, then normally send PS-Poll, obtain this data.
Fig. 3 is the block diagram of data communication equipment according to an embodiment of the invention.
As shown in Figure 3; The present invention also provides a kind of data communication equipment 300; Comprise: Service Processing Module 302; Receive first Frame through radio receiving transmitting module 304, generate and send the affirmation message frame of said first Frame, the affirmation message frame of said first Frame is short acknowledge message frame; Comprise the second Frame indicating bit in the said short acknowledge message frame, represent when the value of the said second Frame indicating bit is first value said data communication equipment 300 for the transmit leg buffer memory of said first Frame second Frame; Said radio receiving transmitting module 304 is used for and said data communication equipment 300 outside interaction datas.In this technical scheme; Data communication equipment 300 can be equipment such as router, mobile phone, panel computer, notebook computer; Service Processing Module 302 is equivalent to handle the chip of wireless local network service, and radio receiving transmitting module 304 is equivalent to the antenna of transmitting/receiving wireless local area network signal, can be used as the AP of wireless network; After receiving upstream data, can be through Short ACK notice STA promising its buffer memory downlink data whether; Also can be used as the terminal and data interaction is carried out at other terminal, whether promising its prepared data to notify other terminal, avoids the other side's message of need redispatching to confirm, avoids causing network busy, helps the terminal power saving.
In technique scheme, the said second Frame indicating bit comprises the one or more positions in the physics frame head of said short acknowledge message frame.In this technical scheme, can utilize the physics frame head of Short ACK to identify.
In technique scheme, the said second Frame indicating bit comprises the one or more positions in the signal domain in the said physics frame head of said short acknowledge message frame.In this technical scheme, show SIG (signal) territory that can play the sign effect, it will be appreciated by those skilled in the art that to be merely example here that other position equally maybe be as the second Frame indicating bit.
In technique scheme, when being second value, the value of the said second Frame indicating bit representes that said data communication equipment 300 is not said second Frame of said transmit leg buffer memory, said transmit leg can dormancy.In this technical scheme, can clearly notify whether be data interaction the opposing party's buffer memory data.
In technique scheme, said Service Processing Module 302 with the said transmit leg negotiation communication time, and received said first Frame at said call duration time before receiving said first Frame, and said call duration time is positioned at non-competing phase or competition phase.In this technical scheme, in advance the negotiation communication time, can avoid the time that selecting network is busy or other terminate load of AP/ is too high to send upstream data, cause other terminal of AP/ in time not respond.
In technique scheme, said Service Processing Module 302 also receives the power-save poll frame of said transmit leg through said radio receiving transmitting module 304, and sends said second Frame to said transmit leg.In this technical scheme,, then send to the other side with data cached at the opposing party's who receives data interaction PS-Poll frame.
Fig. 4 is the flow chart of data communications method according to an embodiment of the invention.
As shown in Figure 4, the present invention also provides a kind of data communications method, comprising: step 402 receives first Frame; Step 404; Generate and send the affirmation message frame of said first Frame; The affirmation message frame of said first Frame is short acknowledge message frame; Comprise the second Frame indicating bit in the said short acknowledge message frame, the recipient who representes first Frame when value of the said second Frame indicating bit is first value for the transmit leg buffer memory said second Frame.In this technical scheme, can be used as STA and send upstream data to behind the AP, whether be its buffer memory downlink data, do not need to know through blindly sending PS-Poll according to the Short ACK that returns (short affirmation) message if can judge AP; Or send data to other terminal, according to the Short ACK that other terminal is returned, whether be its buffer memory desired data, equally also do not need to send out message authentication separately if can judge other terminal, avoid causing network busy, helps the terminal power saving.
In technique scheme, the said second Frame indicating bit comprises the one or more positions in the physics frame head of said short acknowledge message frame.In this technical scheme, can utilize the physics frame head of Short ACK to identify.
In technique scheme, the said second Frame indicating bit comprises the one or more positions in the signal domain in the said physics frame head of said short acknowledge message frame.In this technical scheme, show SIG (signal) territory that can play the sign effect, it will be appreciated by those skilled in the art that to be merely example here that other position equally maybe be as the second Frame indicating bit.
In technique scheme, when being second value, the value of the said second Frame indicating bit representes that said recipient is not said transmit leg buffer memory second Frame, said transmit leg can dormancy.In this technical scheme, the terminal can definite network in AP or other terminal data that whether have been its buffer memory.
In technique scheme, before said step 402, also comprise: with the said transmit leg negotiation communication time, and receive said first Frame at said call duration time, said call duration time is positioned at non-competing phase or competition phase.In this technical scheme, in advance the negotiation communication time, can avoid the time that selecting network is busy or other terminate load of AP/ is too high to send upstream data, cause other terminal of AP/ in time not respond.
In technique scheme, preferably, also comprise: receive the power-save poll frame, and send said second Frame to said transmit leg.In this technical scheme, when not needing data interaction, keep dormancy to help saving electric weight.
Fig. 5 and Fig. 6 are the workflow diagrams of the data communication equipment of one embodiment of the present of invention.
In existing standard, STA and AP carry out interacting message through the mode of reservation in CFP (contention free period, non-competing phase); Consider the intelligence instrument application scenarios, STA through with the AP negotiation communication time, revive at certain time point STA; Give AP reporting uplink data; AP replys the ACK acknowledgement frame to STA after receiving upstream data, and the data that notice STA reports receive that STA gets into resting state once more then.
And in 11ah, defined a kind of brand-new ACK form, be called the short acknowledgement frame of short ACK; Promptly substitute mac frame with physics frame head SIG signal domain, its form is specifically as shown in Figure 7, has not existed mac frame different in the structure of short ACK; And be to use the SIG territory to substitute the effect of mac frame, and wherein there are 4 to keep position (reserved), can use one of them position as flag; Be used as not having the sign that TIM signaling STA obtains downlink data, this position is set to 0, and expression AP does not have the buffer memory downlink data; This position is set to 1, and expression AP has the buffer memory downlink data.Shown in specifically can seeing the following form:
Figure BDA00001772715900131
As above show, STA can judge whether the downlink data indicating bit is changed to 1 after receiving the short ACK frame that AP replys, if be changed to 1, STA can keep reviving, and sends the PS-Poll frame and gives AP, obtains downlink data.
Particularly, STA that realizes according to downlink data communicator of the present invention and the workflow of AP are as shown in Figure 5:
Step 502, STA sends upstream data and gives AP;
Step 504, AP returns short ACK frame after receiving upstream data, and STA receives and is somebody's turn to do short ACK frame;
Step 506, STA resolves the indicating bit among the short ACK, and the value of confirming this is 1 or 0;
Step 508 if this position is 0, explains that AP is not data cached for STA, and STA also gets into dormancy, revives until call duration time next time and continues to send upstream data, and this call duration time can be chosen in the non-competing phase;
Step 510 if this position is 1, is explained the AP data that have been the STA buffer memory, and then STA continues to send PS-Poll, obtains downlink data from AP then, and the carrying out time of this step can be chosen in the non-competing phase, also can be chosen in the competition phase.
Likewise, technique scheme also can be used for the data interaction between two terminals, and is specifically as shown in Figure 6:
Step 602, terminal A is sent to terminal B with data;
Step 604, terminal B receives these data, returns short ACK frame, and terminal A receives and is somebody's turn to do short ACK frame;
Step 606, terminal A resolves the indicating bit of short ACK, and the value of confirming this is 1 or 0;
Step 608 if this position is 0, explains that terminal B is not data cached for terminal A, and terminal A gets into dormancy, and reviving until call duration time next time continues as terminal B transmission data, and this call duration time can be chosen in the non-competing phase;
Step 610 if this position is 1, is explained the terminal B data that have been terminal A buffer memory, and then terminal A continues to send PS-Poll, and B obtains data in buffer from the terminal then, and the carrying out time of this step can be chosen in the non-competing phase, also can be chosen in the competition phase.
In sum; Through technical scheme of the present invention, can realize downlink data communicator and downlink data communication means, the STA of no TIM signaling blindly sends PS-Poll and obtains downlink data to AP; Help the terminal power saving simultaneously, and improved the effective rate of utilization of network.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (26)

1. a data communication equipment is characterized in that, comprising:
Service Processing Module; Generate first Frame and send said first Frame through radio receiving transmitting module; And the affirmation message frame that receives said first Frame; The affirmation message frame of said first Frame comprises the second Frame indicating bit for short acknowledge message frame in the described short acknowledge message frame, the recipient who representes said first Frame when value of the said second Frame indicating bit is first value second Frame that has been said data communication equipment buffer memory;
Said radio receiving transmitting module is used for and the outside interaction data of said data communication equipment.
2. data communication equipment according to claim 1 is characterized in that, the said second Frame indicating bit comprises the one or more positions in the physics frame head of said short acknowledge message frame.
3. data communication equipment according to claim 2 is characterized in that, the said second Frame indicating bit comprises the one or more positions in the signal domain in the said physics frame head of said short acknowledge message frame.
4. data communication equipment according to claim 1; It is characterized in that; The recipient who representes said first Frame when value of the said second Frame indicating bit is second value is not said second Frame of said data communication equipment buffer memory, and said data communication equipment can dormancy.
5. data communication equipment according to claim 1; It is characterized in that; Said Service Processing Module is before sending said first Frame; With said recipient's negotiation communication time, and send said first Frame at said call duration time, said call duration time is positioned at non-competing phase or competition phase.
6. data communication equipment according to claim 5; It is characterized in that after said Service Processing Module and said recipient consulted said call duration time, said data communication equipment carried out dormancy; And revive at said call duration time, to send said first Frame.
7. according to each described data communication equipment in the claim 1 to 6; It is characterized in that; When said Service Processing Module is said first value in the value of the said second Frame indicating bit; Send the power-save poll frame through said radio receiving transmitting module, and receive said second Frame from said recipient.
8. a data communications method is characterized in that, comprising:
Generate first Frame;
Send said first Frame;
Receive the affirmation message frame of said first Frame; The affirmation message frame of said first Frame is short acknowledge message frame; Comprise the second Frame indicating bit in the said short acknowledge message frame, the recipient who representes said first Frame when value of the said second Frame indicating bit is first value for the transmit leg buffer memory second Frame.
9. data communications method according to claim 8 is characterized in that, the said second Frame indicating bit comprises the one or more positions in the physics frame head of said short acknowledge message frame.
10. data communications method according to claim 9 is characterized in that, the said second Frame indicating bit comprises the one or more positions in the signal domain in the said physics frame head of said short acknowledge message frame.
11. data communications method according to claim 8 is characterized in that, representes when the value of the said second Frame indicating bit is second value that said recipient is not said second Frame of said transmit leg buffer memory, said transmit leg can dormancy.
12. data communications method according to claim 8 is characterized in that, also comprises:
Before sending said first Frame, with said recipient's negotiation communication time, and send said first Frame at said call duration time, said call duration time is positioned at non-competing phase or competition phase.
13. data communications method according to claim 12 is characterized in that, also comprises:
After consulting said call duration time, carry out dormancy, and revive, to send said first Frame at said call duration time with said recipient.
14. each described data communications method in 13 is characterized in that according to Claim 8, also comprises:
When the value of the said second Frame indicating bit is said first value, sends the power-save poll frame, and receive said second Frame from said recipient.
15. a data communication equipment is characterized in that, comprising:
Service Processing Module; Receive first Frame through radio receiving transmitting module; Generate and send the affirmation message frame of said first Frame; The affirmation message frame of said first Frame comprises the second Frame indicating bit for short acknowledge message frame in the said short acknowledge message frame, represent when the value of the said second Frame indicating bit is first value said data communication equipment be said first Frame the transmit leg buffer memory second Frame;
Said radio receiving transmitting module is used for and the outside interaction data of said data communication equipment.
16. data communication equipment according to claim 15 is characterized in that, the said second Frame indicating bit comprises the one or more positions in the physics frame head of said short acknowledge message frame.
17. data communication equipment according to claim 16 is characterized in that, the said second Frame indicating bit comprises the one or more positions in the signal domain in the said physics frame head of said short acknowledge message frame.
18. data communication equipment according to claim 15 is characterized in that, representes when the value of the said second Frame indicating bit is second value that said data communication equipment is not said second Frame of said transmit leg buffer memory, said transmit leg can dormancy.
19. data communication equipment according to claim 15; It is characterized in that; Said Service Processing Module is before receiving said first Frame; With the said transmit leg negotiation communication time, and receive said first Frame at said call duration time, said call duration time is positioned at non-competing phase or competition phase.
20., it is characterized in that said Service Processing Module also receives the power-save poll frame of said transmit leg through said radio receiving transmitting module according to each described data communication equipment in the claim 15 to 19, and send said second Frame to said transmit leg.
21. a data communications method is characterized in that, comprising:
Receive first Frame;
Generate and send the affirmation message frame of said first Frame; The affirmation message frame of said first Frame is short acknowledge message frame; Comprise the second Frame indicating bit in the said short acknowledge message frame, the recipient who representes first Frame when value of the said second Frame indicating bit is first value for the transmit leg buffer memory said second Frame.
22. data communications method according to claim 21 is characterized in that, the said second Frame indicating bit comprises the one or more positions in the physics frame head of said short acknowledge message frame.
23. data communications method according to claim 22 is characterized in that, the said second Frame indicating bit comprises the one or more positions in the signal domain in the said physics frame head of said short acknowledge message frame.
24. data communications method according to claim 21 is characterized in that, representes when the value of the said second Frame indicating bit is second value that said recipient is not said transmit leg buffer memory second Frame, said transmit leg can dormancy.
25. data communications method according to claim 21 is characterized in that, also comprises:
Before receiving said first Frame, with the said transmit leg negotiation communication time, and receive said first Frame at said call duration time, said call duration time is positioned at non-competing phase or competition phase.
26. according to each described data communications method in the claim 21 to 25, it is characterized in that, also comprise:
Receive the power-save poll frame of said transmit leg, and send said second Frame to said transmit leg.
CN201210199222.1A 2012-06-15 2012-06-15 Data communication device and method Active CN102711228B (en)

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