CN103166744A - Method for dynamically sending acknowledgement (ACK) bitmap in automatic repeat request (ARQ) mechanism - Google Patents
Method for dynamically sending acknowledgement (ACK) bitmap in automatic repeat request (ARQ) mechanism Download PDFInfo
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- CN103166744A CN103166744A CN2011104050186A CN201110405018A CN103166744A CN 103166744 A CN103166744 A CN 103166744A CN 2011104050186 A CN2011104050186 A CN 2011104050186A CN 201110405018 A CN201110405018 A CN 201110405018A CN 103166744 A CN103166744 A CN 103166744A
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Abstract
The invention provides a method for dynamically sending an acknowledgement (ACK) bitmap in an automatic repeat request (ARQ) mechanism. The method for dynamically sending the ACK bitmap in the ARQ mechanism comprises that a receiver judges whether the ACK bitmap needs to be carried by a receipt confirmation message in each radio frame; when the ACK bitmap needs to be carried, the receiver calculates a largest length of the ACK bitmap which can be carried according to resources which can be occupied, builds the ACK bitmap according to a data unit receiving state, and returns the receipt confirmation message with the ACK bitmap to a sender, wherein the length of the ACK bitmap is smaller than or equal to the largest length of the ACK bitmap. When the method for dynamically sending the ACK bitmap in the ARQ mechanism is used, no matter how many radio resources which can be occupied the receiver has, each radio frame can return a latest receipt confirmation message to the sender in the process of data transmission, data retransmission of the sender due to delayed return of the receipt confirmation message is avoided, and thus waste of the radio resources is avoided, and data transmission efficiency is improved.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of method that dynamically sends the ACK bitmap in ARQ mechanism.
Background technology
In wireless communication system; affected by the various extraneous factors such as space electromagnetic interference; the channel conditions fluctuation is larger, for guaranteeing the reliability of transfer of data, usually can enable automatic retransmission request mechanism (ARQ) when wireless communication system carries out transfer of data.So-called ARQ mechanism is exactly in data transmission procedure, the recipient will obtain from the accepting state of data cell " replying (acknowledge) information " (ACK), ACK information is mapped to the ACK bitmap, and it is returned to transmit leg, transmit leg retransmits the data unit according to the ACK bitmap.
In the existing wireless communications system (as McWiLL), in data transmission procedure, the process that the recipient sends the ACK bitmap as shown in Figure 1:
101, in data transmission procedure, the recipient must construct confirmation of receipt message in each radio frames;
102, the recipient judges whether carry the ACK bitmap in confirmation of receipt message according to the data cell accepting state, if having mistake in the data cell that the recipient receives, need carry the ACK bitmap in confirmation of receipt message;
103, if confirmation of receipt message need be carried the ACK bitmap, the recipient receives information mapping ACK bitmap according to the data cell of data cell accepting state judgement reception reflection;
104, if the data cell of the present frame that the recipient correctly receives, need not to carry the ACK bitmap in confirmation of receipt message, only need in last correct data cell that receives of confirmation of receipt message indicating;
105, current wireless frame confirmation of receipt message constructing is completed, and will send to transmit leg by the recipient with form of message;
106, the Radio Resource that the recipient can take not is unlimited, if the Radio Resource that the current wireless frame takies is not enough to send the confirmation of receipt message of present frame structure, will leave over part message burst sends to next frame, if and present frame has the confirmation of receipt message burst of leaving over not send, send because of the confirmation of receipt message that has precedence over the present frame structure;
107, present frame has the confirmation of receipt message burst of leaving over not send, and first sends the confirmation of receipt message burst of leaving over;
108, the Radio Resource that the recipient takies according to present frame, and the confirmation of receipt message burst length of leaving over, judge whether the present frame Radio Resource enough sends the confirmation of receipt message burst of leaving over, if if the Radio Resource that present frame takies enough sends the confirmation of receipt message burst of leaving over, continue to send the confirmation of receipt message of present frame structure;
109, if if the Radio Resource that present frame takies enough sends the confirmation of receipt message burst of leaving over, perhaps present frame without the confirmation of receipt message burst of leaving over, sends the confirmation of receipt message of present frame structure;
110, the Radio Resource that the recipient takies according to present frame, and confirmation of receipt message-length judge whether the present frame Radio Resource enough sends confirmation of receipt message;
111, if the present frame Radio Resource does not enough send confirmation of receipt message, with confirmation of receipt message burst, leave over the message burst next frame that can't send and send;
112, if the present frame Radio Resource enough sends confirmation of receipt message, the present frame recipient is sent completely to the confirmation of receipt message of transmit leg.
In prior art, there are the following problems at least:
in step 103, if need carry the ACK bitmap in confirmation of receipt, the recipient is only according to the accepting state mapping ACK bitmap of data cell, and do not consider whether be enough to send the confirmation of receipt message of carrying longer ACK bitmap when its Radio Resource that takies of frame, again by following step 106～112, Radio Resource can be taken the recipient less, when being not enough to send the confirmation of receipt message of carrying longer ACK bitmap, a confirmation of receipt message may occur need to divide several frames just can be sent completely, the transmission priority of the confirmation of receipt message burst of leaving over is again higher than the confirmation of receipt message of neotectonics, therefore, in the situation that the Radio Resource that the recipient can take is less, as long as confirmation of receipt message transmission lag, affect continuously the confirmation of receipt message that sends thereafter, cause transmit leg can't obtain up-to-date confirmation of receipt message always and carry out data unit retransmission, cause waste of radio resources and then affect data transmission quality.
In sum, the ARQ mechanism of transmission ACK bitmap of the prior art in the less situation of Radio Resource that transmit leg can take, can not in time be returned to up-to-date confirmation of receipt message, causes the transmit leg data retransmission to cause waste of radio resources.
Summary of the invention
Embodiments of the invention provide a kind of method that dynamically sends the ACK bitmap in ARQ mechanism, up-to-date confirmation of receipt message can be returned to transmit leg in each radio frames, avoid confirmation of receipt message to return to the untimely transmit leg data re-transmission that causes, improve data transmission efficiency.
Dynamically send the method for ACK bitmap in a kind of ARQ mechanism, the method comprises: the recipient judges in each radio frames whether confirmation of receipt message needs to carry the ACK bitmap; If need carry the ACK bitmap, the recipient is according to the maximum length that can take Resource Calculation portability ACK bitmap, and constructs the ACK bitmap that is no more than described maximum length according to the data cell accepting state, is carried in confirmation of receipt message and returns to transmit leg.Wherein, can take channel resource, time-frequency piece resource, power resource or its combination in any that resource comprises that the recipient can take; Issuable redundant bit in the modulating-coding process when maximum length of portability ACK bitmap has been deducted wireless transmission.
Especially, in the data double-way transmitting procedure, if the recipient has data cell need send to transmit leg simultaneously, described confirmation of receipt message has precedence over the data cell transmission.
Preferably, if the data cell that the recipient receives all by verification, and data cell is order, confirmation of receipt message is not carried the ACK bitmap, and indicate last correct data cell that receives.If exist not by verification in the received data cell of recipient, perhaps due to do not receive some data cell make the data cell that receives be not the order, confirmation of receipt message is carried the ACK bitmap, and the data cell of indicating first not receive.Wherein, but described indication can complete by any sign of this data cell of unique identification; The confirmation of receipt message that but the length of any sign of unique identification data unit is less than or equal to the recipient can be transmitted when taking minimum of resources allows the corresponding field maximum length of carrying.
Preferably, the ACK bitmap forms according to the data cell reception information mapping of data cell accepting state reflection; From first by verification or the data cell that does not receive do not begin Sequential Mapping, 1 bit corresponding data unit, if by verification or the data cell that do not receive with bit 0 indication, use bit 1 to indicate by the data cell of verification.
Adopt this mechanism, the recipient according to the data cell accepting state with and the Radio Resource that can take structure confirmation of receipt message, make the Radio Resource that present frame takies enough send the confirmation of receipt message that present frame is constructed, guarantee to receive and in each radio frames, up-to-date confirmation of receipt message to be sent to transmit leg, avoid confirmation of receipt to send the untimely data re-transmission that causes, guaranteed data transmission quality on the basis of not wasting Radio Resource.
Description of drawings
Fig. 1 is the transmission ACK bitmap process schematic diagram of ARQ mechanism in prior art;
Fig. 2 is the process schematic diagram of the dynamic transmission ACK bitmap of the embodiment of the present invention.
Embodiment
The embodiment of the present invention, can but and only limit to the McWiLL wireless communication system.
Understanding for ease of to the embodiment of the present invention is described in further details embodiments of the present invention below in conjunction with accompanying drawing.
Dynamically send the realization flow of ACK bitmap in the ARQ mechanism of the present embodiment as shown in Figure 2, concrete steps are as follows:
201, in data transmission procedure, the recipient must construct confirmation of receipt message in each radio frames;
202, recipient's judgement, whether confirmation of receipt message needs to carry the ACK bitmap, if exist not by verification in the received data cell of recipient, perhaps due to do not receive some data cell make the data cell that receives be not the order, need carry the ACK bitmap in confirmation of receipt message;
203, if confirmation of receipt message need be carried the ACK bitmap, the Radio Resource that first takies according to present frame of recipient, calculate the maximum length of the confirmation of receipt message portability ACK bitmap of current wireless frame structure, and receive information mapping ACK bitmap according to the data cell of data cell accepting state reflection;
Recipient's Radio Resource shared according to it calculates the maximum length of portability ACK bitmap in confirmation of receipt message, issuable redundant bit in the modulating-coding process in the time of should deducting wireless transmission during calculating guarantees that with this current wireless frame can be sent completely confirmation of receipt message;
The ACK bitmap is not begin Sequential Mapping by the data cell of verification or not reception from first, the corresponding data unit of 1 bit, if do not indicate with bit 0 by the data cell of verification or not reception, indicate with bit 1 by the data cell of verification, the ACK bitmap lengths is no more than the maximum length of the current wireless frame permission of recipient's calculating;
Carry the ACK bitmap simultaneously, also need indicate first not by verification or the data cell of reception not, but this is being designated as any sign of this data cell of unique identification, as the data element number, data cell keyword segment number etc.;
204, if all data cells that recipient's current wireless frame receives all by verification, and data cell is order, need not to carry the ACK bitmap in confirmation of receipt message, only needs in last correct data cell that receives of confirmation of receipt message indicating.But indication herein can realize by any sign of this data cell of unique identification, such as data cell numbering, data cell keyword segment number etc.; Any sign of unique identification data unit, as the data element number, data cell keyword segment number etc., the confirmation of receipt message that can transmit when its length should be less than or equal to the recipient and takies minimum of resources allows the corresponding field maximum length of carrying, and confirmation of receipt message all can be sent completely at present frame to guarantee the recipient;
205, current wireless frame confirmation of receipt message constructing is completed;
206, the recipient sends to transmit leg at present frame fully with confirmation of receipt message;
If in the data double-way transmitting procedure, namely the recipient has data cell need send to transmit leg simultaneously, and confirmation of receipt message need have precedence over data cell and send.
In said process, the recipient judges that the criterion of whether carrying the ACK bitmap in confirmation of receipt message can arrange flexibly according to each system business characteristics, be not limited to the given determination methods of the present embodiment, the structure of correspondingly, confirmation of receipt message and ACK bitmap also can be different because of the difference of judgment criterion business.
Dynamically send the method for ACK bitmap in the ARQ mechanism that the embodiment of the present invention provides, the recipient according to the data cell accepting state with and the Radio Resource that can take structure confirmation of receipt message, make the Radio Resource that present frame takies enough send the confirmation of receipt message that present frame is constructed, guarantee to receive and in each radio frames, up-to-date confirmation of receipt message to be sent to transmit leg, avoid confirmation of receipt to send the untimely data re-transmission that causes, guaranteed data transmission quality on the basis of not wasting Radio Resource.
The above; only for the better embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement are within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. dynamically send the method for ACK bitmap in an ARQ mechanism, it is characterized in that:
A, recipient judge in each radio frames whether confirmation of receipt message needs to carry the ACK bitmap;
If b need carry the ACK bitmap, the recipient is according to the maximum length that can take Resource Calculation portability ACK bitmap, and constructs the ACK bitmap that is no more than described maximum length according to the data cell accepting state, is carried in confirmation of receipt message and returns to transmit leg.
2. method according to claim 1, is characterized in that, in the data double-way transmitting procedure, if the recipient has data cell need send to transmit leg simultaneously, described confirmation of receipt message has precedence over the data cell transmission.
3. method according to claim 1, it is characterized in that step a, if the data cell that the recipient receives all by verification, and data cell be the order, confirmation of receipt message is not carried the ACK bitmap, and indicates last correct data cell that receives.
4. method according to claim 1, it is characterized in that step a, if exist not by verification in the received data cell of recipient, perhaps due to do not receive some data cell make the data cell that receives be not the order, confirmation of receipt message is carried the ACK bitmap, and indicates first not by the data cell of verification or the data cell that does not receive.
5. one of according to claim 3 or 4 described methods, is characterized in that, but described indication is completed by any sign of this data cell of unique identification.
6. method according to claim 5, is characterized in that, but any sign of described this data cell of unique identification, and the confirmation of receipt message that can transmit when its length is less than or equal to the recipient and takies minimum of resources allows the corresponding field maximum length of carrying.
7. method according to claim 1, is characterized in that step b, describedly takies channel resource, time-frequency piece resource, power resource or its combination in any that resource comprises that the recipient can take.
8. method according to claim 1, is characterized in that step b, issuable redundant bit in the modulating-coding process when maximum length of described portability ACK bitmap has been deducted wireless transmission.
9. method according to claim 1, is characterized in that step b, and described ACK bitmap is to shine upon according to the data cell reception information of data cell accepting state reflection to form.
10. method according to claim 9, it is characterized in that, described mapping is specially from first and does not begin Sequential Mapping by the data cell of verification or not reception, the corresponding data unit of 1 bit, indicate with bit 0 by the data cell of verification or not reception, indicate with bit 1 by the data cell of verification.
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| CN2011104050186A CN103166744A (en) | 2011-12-08 | 2011-12-08 | Method for dynamically sending acknowledgement (ACK) bitmap in automatic repeat request (ARQ) mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104954446A (en) * | 2015-05-28 | 2015-09-30 | 北京中亦安图科技股份有限公司 | Message pushing method and system |
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| US20050201325A1 (en) * | 2004-03-12 | 2005-09-15 | Samsung Electronics Co., Ltd. | Method for operation of HARQ in a broadband wireless access communication system |
| CN1996820A (en) * | 2006-01-04 | 2007-07-11 | 上海原动力通信科技有限公司 | Data transfer method and device based on the double layer automatic re-transfer request structure |
| CN101222303A (en) * | 2007-01-09 | 2008-07-16 | 中兴通讯股份有限公司 | Method for implementing media access control layer ascending feedback |
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- 2011-12-08 CN CN2011104050186A patent/CN103166744A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050201325A1 (en) * | 2004-03-12 | 2005-09-15 | Samsung Electronics Co., Ltd. | Method for operation of HARQ in a broadband wireless access communication system |
| CN1996820A (en) * | 2006-01-04 | 2007-07-11 | 上海原动力通信科技有限公司 | Data transfer method and device based on the double layer automatic re-transfer request structure |
| CN101222303A (en) * | 2007-01-09 | 2008-07-16 | 中兴通讯股份有限公司 | Method for implementing media access control layer ascending feedback |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104954446A (en) * | 2015-05-28 | 2015-09-30 | 北京中亦安图科技股份有限公司 | Message pushing method and system |
| CN104954446B (en) * | 2015-05-28 | 2019-02-12 | 北京中亦安图科技股份有限公司 | Information push method and system |
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Application publication date: 20130619 |