CN101621744A - Method, device and system for sending downlink acknowledge message - Google Patents

Abstract

The invention discloses a method for sending a downlink acknowledge message. The method comprises the following steps of: sending at least two multicast messages from a base station BS, wherein each multicast message comprises an uplink resource allocation message of a mobile station MS; establishing an acknowledge ACK bit map for each multicast message; receiving data from the MS and setting the ACK bit map according to the multicast message in the uplink resource allocation message corresponding to the MS; and sending the ACK bit map. The invention also discloses base station equipment and a system for sending the downlink acknowledge message.

Description

A kind of downlink acknowledge message sending method, Apparatus and system

Technical field

The present invention relates to the mobile communication technology field, relate in particular to method, the Apparatus and system of a kind of descending affirmation of transmission (Acknowledgement:ACK).

Background technology

In order to finish data communication, base station (Base Station:BS) and portable terminal (MobileStation:MS) need be set, and message is transmitted the requirement that need satisfy agreement between base station and portable terminal.For example, the control messages of Institute of Electrical and Electronics Engineers (Institute of Electrical and Electronic Engineers:IEEE) 802.16 agreements adopts the form of broadcasting to send to MS, BS can't learn MS whether correct received message, in order to guarantee that MS also can receive the broadcast that BS sends in the poorest channel circumstance, so BS adopts the modulation coding mode (ModulationCoding Scheme:MCS) than lower-order to transmit this control messages.

Wherein, control messages is made up of cell (Information Element:IE), and a control messages can be made up of one or more cells.

Mixing automatic retransmission technique (Hybrid automatic repeat request:HARQ) is an important techniques, based on automatic retransmission technique (Automatic Repeat request:ARQ) and forward error correction technique (Forward Error Correction:FEC).If receiving terminal then passes through ARQ request repeat data by the wrong generation of data decode in packet of cyclic redundancy detection (CyclicRedundancy Check:CRC) verification discovery, and then improves the reliability of the correct decoding of misdata bag.What HARQ adopted is the ARQ mode of stopping grade, just the receiving terminal feedback error is confirmed (Negative Acknowlegement:NACK) when the CRC check mistake, transmitting terminal just can be judged the incorrect reception packet of receiving terminal by receiving NACK, and then transmitting terminal can select appropriate information to resend packet.

In the prior art, the flow chart of descending ACK transmission is as shown in Figure 1:

Step 1, BS comprises the message of ascending resource for the MS assignment by broadcast;

Wherein, the full name of described broadcast in existing protocol is sub-down link up link media access protocol (DownLink-UpLink-Medium Access Protocol:DL-UL-MAP).

Step 2, MS sends data according to the message of BS assignment on the position of correspondence;

Step 3, BS is after receiving the data that MS sends, if decoding is correct, just with the bit diagram (bitmap) in ACK bit figure (the Acknowledgement bitmap:ACK bitmap) cell to bit position 0 that should MS, otherwise just with the bit diagram in the ACK bit figure cell to bit position 1 that should MS.Afterwards, BS will comprise the assignment message of ACK bit figure cell as the affirmation (ACK) to MS, send to MS.

Wherein, ACK bit figure cell just mixes automatic re-transmission cell, and the bit diagram in the ACK bit figure cell is to determine according to the resource of assignment in the described multicast message to bit that should MS.

In the prior art, only set up an ACK bit figure cell.

After MS received downlink acknowledge message, the bit diagram in the ACK bit figure cell of determining according to assigned resources in the described broadcast determined to bit that should MS whether institute's data that send are correct after BS decodes.

To confirm that BS is not correctly decoded own when sending out data as MS, can re-execute step 1 to 3, promptly wait for BS assigned resources or MS can applying step 1 in BS the resource selection appropriate information of assignment retransmit, or do not retransmit.In addition, can limit the frequency threshold value that MS sends data, surpass this threshold value MS and stop to send data.

The inventor finds that there are the following problems at least in the prior art: can determine data that MS the sends out correct problem of whether decoding though prior art has solved BS, but, because the ACK bit figure that is set up has only one, in order to guarantee that the MS in the poorest channel circumstance also can receive the broadcast that BS sends, BS has to adopt the modulation coding mode than lower-order to transmit descending ACK, thereby caused the waste of resource, also strengthened simultaneously the transmitting power of BS, increased interference the adjacent area.

Summary of the invention

In view of this, the embodiment of the invention provides a kind of method, Apparatus and system that sends downlink acknowledge message, in order to transmitting power that reduces BS and the interference that reduces the adjacent area.

A kind of method that sends downlink acknowledge message that the embodiment of the invention provides comprises step:

Base station BS sends at least two multicast messages, and each multicast message includes the ascending resource assignation information of mobile station MS; For each multicast message is set up affirmation ACK bit figure; Reception is from the data of MS, according to the multicast message at the ascending resource assignation information place corresponding with described MS, to described ACK bit figure set; Send described ACK bit figure.

The embodiment of the invention also provides a kind of base station equipment, comprising:

The multicast message transmitting element is used for sending at least two multicast messages, and each multicast message includes the ascending resource assignation information of mobile station MS;

ACK bit figure generation unit is used to each multicast message to set up ACK bit figure;

The set unit receives the data from MS, according to the multicast message at the ascending resource assignation information place corresponding with described MS, to described ACK bit figure set;

ACK bit figure transmitting element is used to send the ACK bit figure after described set unit set.

The embodiment of the invention also provides a kind of communication system, comprises BS:

Described BS is used for sending at least two multicast messages to MS, and each multicast message includes the ascending resource assignation information of mobile station MS; For each multicast message is set up affirmation ACK bit figure; Reception is from the data of MS, according to the multicast message at the ascending resource assignation information place corresponding with described MS, to described ACK bit figure set and the ACK bit figure after MS sends set.

As seen, the method of the transmission downlink acknowledge message that the application embodiment of the invention provides, BS can set up the ACK bit figure based on different multicast messages, can adopt different modulation coding modes, reduce the transmitting power of BS, and reached the purpose that reduces the adjacent area interference.

Description of drawings

The flow chart that downlink acknowledge message sends in Fig. 1 prior art;

Fig. 2 is the flow chart that the downlink acknowledge message of the embodiment of the invention one sends;

Fig. 3 is a system embodiment schematic diagram of the present invention;

Fig. 4 is the base station module figure of the embodiment of the invention.

Embodiment

By in the background technology to the description that sends the downlink acknowledge message method as can be known, BS has only one according to the ACK bit figure that decoding MS sends the foundation of data correctness, in order to reach the transmitting power that reduces BS and to reduce the purpose that the adjacent area is disturbed, if can set up ACK bit figure based on different multicast messages, adopt different modulation coding modes, so, just can reach the transmitting power that reduces BS and reduce the purpose that the adjacent area is disturbed.

Below in conjunction with drawings and the specific embodiments the present invention is elaborated.

Fig. 2 is the flow chart that downlink acknowledge message sends in the embodiment of the invention, in the figure:

1. base station BS sends at least two multicast messages, and each multicast message includes the ascending resource assignation information of mobile station MS, sets up for each multicast message and confirms ACK bit figure;

2.BS receive data from MS;

3.BS after receiving data, according to the multicast message at the ascending resource assignation information place corresponding, to described ACK bit figure set with described MS from MS; BS sends described ACK bit figure.

Wherein, concrete set mode can be if decoding is correct, just with the bit position 0 of the corresponding MS of the bit diagram in the ACK bit figure cell, otherwise just with the bit position 1 of the correspondence of the bit diagram in ACK bit figure cell MS.In addition, after judging that data that decoding MS sends are whether correct, if correct, also can with ACK bit figure cell in the bit position 1 of the corresponding MS of bit diagram, otherwise with the bit position 0 of the correspondence of the bit diagram in ACK bit figure cell MS.

Each corresponding relation is as shown in table 1 in the step 3, and table 1 is just understood for convenience, is not limited only to the situation shown in the table 1.

Table 1

BS is that described each multicast message is set up the SUB-MAP label, the corresponding relation of sign ACK bitmap and SUB-MAP.After MS receives described ACK message, SUB-MAP label according to this multicast message correspondence obtains the ACK bit figure corresponding with this multicast message, obtain the bit of data that this MS sends correspondence in described corresponding A CK bit diagram according to the assigned resources that has obtained, thereby determine whether the data of sending out are correctly decoded by BS.

To confirm that BS is not correctly decoded own when sending out data as MS, can re-execute step 1 to 3, promptly wait for the BS assigned resources or can applying step 1 in BS the resource selection appropriate information of assignment retransmit or do not retransmit.In addition, can limit the frequency threshold value that MS sends data, surpass this threshold value MS and stop to send data.

Wherein, described ACK bit figure cell is included in the descending assignment message of multicast, or the up assignment message of multicast, or is included in the newly-built multicast message that is used for confirming.Descending assignment message of multicast and the up assignment message of multicast also can be called descending assignment message of multicast and the up assignment message of multicast respectively.

Provide the method that BS in the step 3 sends a plurality of ACK bit figure below:

Set up ACK bit figure cell under the agreement of existing IEEE 802.16 Rev2 P802.16 D4 versions, this cell comprises the ACK bit figure of SUB-MAP label and this SUB-MAP label correspondence.

Concrete, the adding method of ACK bit figure is described below by three tables.Table 2 is cell formats of a plurality of ACK bit figure of portability

Table 2

Grammer	Length	Note
			??ACK?BIT?MAP?ACK?IE{		Descending ACK BIT MAP ACK bitmap
??Extended-2DIUC＝0x0F	??4bits	Types value=the 0x0F of cell
			??Length	??8bits	The length of cell information

Num?ACK?bitmap(p)	??4bits	The number of ACK bitmap
			for(i＝1；i＜＝p；i++){	??-	Enumerate each ACK bitmap
SUB-MAP?indicator	??4bits	SUB-MAP label (SUB-MAP of the ACK bitmap correspondence below the sign)
			ACK?bitmap?Length	??4bits	The length of ACK bitmap
ACK?bitmap	??variable	ACK bitmap (ACK of 1 corresponding data of bit)
			}
padding	??variable	Fill
			}

Table 2 is cell formats of a plurality of ACK bitmap of portability, uses this method, and a cell can carry a plurality of ACK bitmap.

As shown in table 3, table 3 is just understood for convenience, is not limited only to the situation shown in the table 3.

Table 3

Table 4 is ACK bit figure and cell cell format I one to one

Table 4

Grammer	Length	Note
			?ACK?BIT?MAP?ACK?IE{		Descending ACK BIT MAP ACK bitmap

??Extended-2DIUC＝0x0F	??4bits	Types value=the 0x0F of cell
			??Length	??8bits	The length of cell information
??SUB-MAP?indicator	??4bits	SUB-MAP label (SUB-MAP of the ACK bitmap correspondence below the sign)
			??ACK?bitmap?Length	??4bits	The length of ACK bitmap
??ACK?bitmap	??variable	ACK bitmap (ACK of 1 corresponding data of bit)
			??padding	??variable	Fill
??}

In this method, a cell can only carry an ACK bitmap, and each ACK bitmap produces a cell, and this method has provided ACK bitmap and the cell form of cell one to one.

Table 5 is ACK bitmap and cell cell format II one to one

Table 5

Grammer	Length	Note
			??ACK?BIT?MAP?ACK?IE{		Descending ACK BIT MAP ACK bitmap
??Extended-2DIUC＝0x0F	??4bits	Types value=the 0x0F of cell
			??Length	??8bits	The length of cell information
??SUB-MAP?indicator	??4bits	SUB-MAP label (SUB-MAP of the ACK bitmap correspondence below the sign)
			??ACK?bitmap	??variable	ACK bitmap (ACK of 1 corresponding data of bit)

?padding	??variable	Fill
			?}

In this method, a cell can only carry an ACK bitmap, each ACK bitmap can produce a cell, the difference of the method maximum in this method and the table 4 is that the length of ACK bitmap can be obtained by the number that MS resolves the assignment of a preceding SUB MAP, and the length of ACKbitmap directly obtains in the method in the table 4.

As shown in Figure 3, the present invention also provides a system that sends descending acknowledge message, comprising:

BS310 is used for sending at least two multicast messages to MS, and each multicast message includes the ascending resource assignation information of mobile station MS; For each multicast message is set up affirmation ACK bit figure; Reception is from the data of MS, according to the multicast message at the ascending resource assignation information place corresponding with described MS, to described ACK bit figure set and the ACK bit figure after MS sends set.

MS 320, are used to receive downlink acknowledge message, determine whether the data of sending out are correctly decoded by BS.

Wherein, the present invention does not limit MS and how to respond the error in data that BS decoding MS sends.

With reference to Fig. 4, base station equipment embodiment of the present invention below is described, comprising:

Multicast message transmitting element 401 is used to send a plurality of multicast messages, and described multicast message includes the ascending resource assignation information of MS;

ACK bit figure generation unit 402 is used to each multicast message to set up ACK bit figure;

Set unit 403, be used to receive data from MS after, according to the multicast message at the ascending resource assignation information place corresponding with described MS, the ACK bit figure set that described ACK bit figure generation unit is generated;

ACK bit figure transmitting element 405 is used to send the ACK bit figure after described set unit set.

Above-mentioned base station can also comprise SUB-MAP label generation unit 404, is used to described each multicast message to set up the SUB-MAP label, the corresponding relation of sign ACK bit figure and SUB-MAP.

The present invention has set up the ACK bit figure based on different multicast messages, can adopt different modulation coding modes, like this, just can reach the transmitting power that reduces BS and reduce the purpose that the adjacent area is disturbed.

Need to prove, one of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, this program comprises the step of said method when carrying out; Described storage medium, as: ROM/RAM, magnetic disc, CD etc.

It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in the accompanying drawing might not be that enforcement the present invention is necessary.

The scheme of the content record of claim also is the protection range of the embodiment of the invention.

The explanation of above embodiment just is used for helping to understand method of the present invention and thought thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (9)

1, a kind of downlink acknowledge message sending method is characterized in that, comprising:

Base station BS sends at least two multicast messages, and each multicast message includes the ascending resource assignation information of mobile station MS;

For each multicast message is set up affirmation ACK bit figure;

Reception is from the data of MS, according to the multicast message at the ascending resource assignation information place corresponding with described MS, to described ACK bit figure set;

Send described ACK bit figure.

2, sending method as claimed in claim 1 is characterized in that, described set is specially to ACK bit figure:

To receiving the decoded result of described data from MS, bit corresponding with described MS among the ACK bit figure is carried out set according to BS.

3, method according to claim 2 is characterized in that, the bit of MS correspondence is determined by the position of described resource assignment information in multicast message among the described ACK bit figure.

4, method according to claim 1 is characterized in that, described ACK bit figure is included in the ACK bit figure cell.

5, method according to claim 4 is characterized in that, described ACK bit figure cell is included in the descending assignment message of multicast, or the up assignment message of multicast, or is included in the newly-built multicast message that is used for confirming.

6, method according to claim 1 is characterized in that, described foundation for each multicast message confirmed ACK bit figure, comprising:

BS is that described each multicast message is set up the SUB-MAP label, the corresponding relation of sign ACK bit figure and SUB-MAP.

7, a kind of base station equipment is characterized in that, comprising:

The multicast message transmitting element is used for sending at least two multicast messages, and each multicast message includes the ascending resource assignation information of mobile station MS;

ACK bit figure generation unit is used to each multicast message to set up ACK bit figure;

The set unit receives the data from MS, according to the multicast message at the ascending resource assignation information place corresponding with described MS, to described ACK bit figure set;

ACK bit figure transmitting element is used to send the ACK bit figure after described set unit set.

8, base station equipment according to claim 7 is characterized in that, also comprises:

SUB-MAP label generation unit is used to described each multicast message to set up the SUB-MAP label, the corresponding relation of sign ACK bit figure and SUB-MAP.

9, a kind of communication system is characterized in that, comprises BS, but is connected with communication mode with MS, it is characterized in that,

Described BS is used for sending at least two multicast messages to MS, and each multicast message includes the ascending resource assignation information of mobile station MS; For each multicast message is set up affirmation ACK bit figure; Reception is from the data of MS, according to the multicast message at the ascending resource assignation information place corresponding with described MS, to described ACK bit figure set and the ACK bit figure after MS sends set.

Images