CN101567776A - Self-adapting synergizing method and self-adapting synergizing device - Google Patents
Self-adapting synergizing method and self-adapting synergizing device Download PDFInfo
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- CN101567776A CN101567776A CNA2009100863058A CN200910086305A CN101567776A CN 101567776 A CN101567776 A CN 101567776A CN A2009100863058 A CNA2009100863058 A CN A2009100863058A CN 200910086305 A CN200910086305 A CN 200910086305A CN 101567776 A CN101567776 A CN 101567776A
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Abstract
本发明公开了一种自适应协同的方法，包括：移动台根据信道状况，自适应确定划分比例，将数据划分为N1和N2，向基站和中继站发送N1；基站根据N1判断出需要中继站进行协同；中继站根据N1判断出需要移动台进行重传；移动台根据信道状况，自适应确定划分比例，将N2划分为N2/N0个N0，向中继站重传N0；中继站向基站发送N0；基站根据N0判断出需要中继站进行重传；中继站向基站重传N0。本发明还公开了一种自适应协同的装置，包括：移动台发送单元，判断中继站协同单元，判断移动台重传单元，移动台重传单元，中继站发送单元，判断中继站重传单元，中继站重传单元。采用本发明方案，能根据信道状况自适应调整码率，还能降低移动台向基站传输数据的误比特率和误块率，提高资源利用率。
The invention discloses an adaptive coordination method, which includes: the mobile station adaptively determines the division ratio according to the channel condition, divides the data into N 1 and N 2 , and sends N 1 to the base station and the relay station; the base station judges according to N 1 The relay station is required to cooperate; the relay station judges that the mobile station needs to retransmit according to N 1 ; the mobile station adaptively determines the division ratio according to the channel condition, divides N 2 into N 2 /N 0 N 0 , and retransmits N 0 to the relay station ; The relay station sends N 0 to the base station; the base station judges according to N 0 that the relay station needs to retransmit; the relay station retransmits N 0 to the base station. The invention also discloses an adaptive coordination device, comprising: a mobile station sending unit, a relay station coordination unit, a mobile station retransmission unit, a mobile station retransmission unit, a relay station sending unit, a relay station retransmission unit, and a relay station retransmission unit. transfer unit. By adopting the scheme of the invention, the code rate can be adaptively adjusted according to the channel condition, the bit error rate and the block error rate of data transmitted from the mobile station to the base station can be reduced, and the resource utilization rate can be improved.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of self-adapting synergizing method and device.
Background technology
The signal influence that transmission can be declined in wireless channel.For to anti-fading, can use technology such as diversity.Wherein, in this side of up link transmitting terminal, can use the transmission diversity.The basic thought that sends diversity be transmitting terminal with same signal, use different antennae, by different channels, pass to receiving terminal.But in the Cellular Networks mobile communication, travelling carriage can't be settled many antennas, so can't realize traditional transmission diversity in this side of travelling carriage owing to being subjected to reasons such as power, size.
In order to address the above problem, the someone has proposed collaborative notion.Though single mobile station can't be realized traditional transmission diversity, by collaborative,, can realize virtual transmission diversity between a plurality of travelling carriages mutually for the other side sends data.
In the prior art, the scheme of synergistic application under the fixed relay station scene there are two kinds: AF (Amplify-and-Forward amplifies and transmits) and DF (Decode-and-Forward, decoding is transmitted).Two kinds of schemes all are that whole transmission is divided into two time slots.First time slot, travelling carriage is to base station and relay station broadcast data; Second time slot, in the AF scheme, relay station directly amplifies the data of travelling carriage broadcasting, is transmitted to the base station again; In the DF scheme, relay station is earlier with the data decoding of travelling carriage broadcasting, encodes and sends to the base station.
Existing scheme has some shortcomings.At first, AF scheme and DF scheme all can not be carried out the self adaptation adjustment according to channel conditions.Secondly, in the AF scheme, when relay station amplifies useful signal, also can amplify the noise of travelling carriage to this section of relay station link; In the DF scheme, because the error of transmission of link between travelling carriage and the relay station, what relay station was deciphered out may be different with former data, and recompile forwards again in this case, can cause error propagation.In addition, the forwarding of AF scheme and DF scheme no matter be to amplify or decoding, all is to repeat to transmit, and has wasted resource.
Summary of the invention
The embodiment of the invention provides a kind of self-adapting synergizing method and device, to adjust code check according to the channel conditions self adaptation, reduces bit error rate and the Block Error Rate of travelling carriage to the base station transmits data, improves resource utilization.
The embodiment of the invention provides a kind of synergizing method, comprising: travelling carriage is according to channel conditions, and self adaptation is determined division proportion, and data are divided into N
1And N
2, send N to base station and relay station
1The base station is according to N
1Judging needs relay station to work in coordination with; Relay station is according to N
1Judging needs travelling carriage to retransmit; Travelling carriage is according to channel conditions, and self adaptation is determined division proportion, with N
2Be divided into
Individual N
0, retransmit N to relay station
0Relay station sends N to the base station
0The base station is according to N
0Judging needs relay station to retransmit; Relay station retransmits N to the base station
0
The embodiment of the invention provides a kind of collaborative device, comprising: the travelling carriage transmitting element, be used for travelling carriage according to channel conditions, and self adaptation is determined division proportion, and data are divided into N
1And N
2, send N to base station and relay station
1Judge the collaborative unit of relay station, be used for the base station according to N
1Judging needs relay station to work in coordination with; Judge the travelling carriage retransmission unit, be used for relay station according to N
1Judging needs travelling carriage to retransmit; The travelling carriage retransmission unit is used for travelling carriage according to channel conditions, and self adaptation is determined division proportion, with N
2Be divided into
Individual N
0, retransmit N to relay station
0The relay station transmitting element is used for relay station and sends N to the base station
0Judge the relay station retransmission unit, be used for the base station according to N
0Judging needs relay station to retransmit; The relay station retransmission unit is used for relay station and retransmits N to the base station
0
The embodiment of the invention is according to channel conditions adaptively changing N
1And N
2Ratio and N
0Size, can tackle the variation of channel flexibly.The embodiment of the invention is with RCPC codes (Rate Compatible PuncturedConvolutional codes, the rate adaptation convolution code) basic thought is applied under the collaborative scene of fixed relay station, when obtaining diversity gain, also obtained coding gain.Compare with existing scheme, neither can cause the amplification noise of AF scheme, owing to used CRC (Cyclical Redundancy Check, cyclic redundancy check (CRC)) and retransmission mechanism, also can not cause the error propagation of DF scheme, therefore can reduce bit error rate and the Block Error Rate of travelling carriage to the base station transmits data.In addition, because the data with transmitting that relay station receives are two parts of primary data,, therefore improved resource utilization so can as AF scheme and DF scheme, not waste resource.
Description of drawings
Fig. 1 is the Synergistic method schematic diagram of AF scheme in the existing scheme;
Fig. 2 is the Synergistic method schematic diagram of DF scheme in the existing scheme;
Fig. 3 is the self-adapting synergizing method schematic diagram of the embodiment of the invention;
Fig. 4 is the self-adapting synergizing device schematic diagram of the embodiment of the invention.
Embodiment
As shown in Figure 3, the Synergistic method of the embodiment of the invention comprises the steps:
Travelling carriage carries out primary data the CRC coding earlier, and the thought according to RCPC codes is divided into two parts with data then.
The N that the base station sends according to travelling carriage
1Carrying out CRC detects: correct if CRC detects, then transfer of data is correct; If it is incorrect that CRC detects, then need relay station to work in coordination with.
The N that relay station sends according to travelling carriage
1Carry out CRC and detect, correct if CRC detects, then relay station sends N to the base station
0If it is incorrect that CRC detects, then carry out travelling carriage earlier and retransmit N
0, carry out relay station again and send N to the base station
0
Travelling carriage retransmits N
0, base station and relay station can both receive,
As number of retransmissions K
1Be less than or equal to maximum retransmission
The time:
If the K that the base station sends according to travelling carriage
1* N
0The N of travelling carriage transmission before
1Carry out CRC and detect correctly, then transfer of data is correct;
If the K that the base station sends according to travelling carriage
1* N
0The N of travelling carriage transmission before
1It is incorrect to carry out the CRC detection, but the K that relay station sends according to travelling carriage
1* N
0The N of travelling carriage transmission before
1Carry out CRC and detect correctly, then relay station sends N to the base station
0
As number of retransmissions K
1Greater than maximum retransmission
The time, data transmission fault then.
The N that the base station sends according to relaying
0Carrying out CRC detects:
If the N that the base station sends according to relay station
0The N of travelling carriage transmission before
1+ K
1* N
0Carry out CRC and detect correctly, then transfer of data is correct;
If the N that the base station sends according to travelling carriage
0The N of travelling carriage transmission before
1+ K
1* N
0Carry out CRC and detect correctly, then relay station retransmits N to the base station
0
Relay station retransmits N to the base station
0,
As number of retransmissions K
2Be less than or equal to maximum retransmission
The time, if the K that the base station sends according to relay station
2* N
0The N of travelling carriage transmission before
1+ K
1* N
0, the N that sends of relay station
0Carry out CRC and detect correctly, then transfer of data is correct;
As number of retransmissions K
2Greater than maximum retransmission
The time, data transmission fault then.
As shown in Figure 4, the collaborative device of the embodiment of the invention comprises: travelling carriage transmitting element 41, judge the collaborative unit 42 of relay station, judge travelling carriage retransmission unit 43, travelling carriage retransmission unit 44, relay station transmitting element 45, judge relay station retransmission unit 46, relay station retransmission unit 47.
Travelling carriage transmitting element 41 is used for travelling carriage according to channel conditions, and self adaptation is determined division proportion, and data are divided into N
1And N
2, send N to base station and relay station
1
Judge the collaborative unit 42 of relay station, be used for the base station according to N
1Judging needs relay station to work in coordination with;
Judge travelling carriage retransmission unit 43, be used for relay station according to N
1Judging needs travelling carriage to retransmit;
Travelling carriage retransmission unit 44 is used for travelling carriage according to channel conditions, and self adaptation is determined division proportion, with N
2Be divided into
Individual N
0, retransmit N to relay station
0
Relay station transmitting element 45 is used for relay station and sends N to the base station
0
Judge relay station retransmission unit 46, be used for the base station according to N
0Judging needs relay station to retransmit;
Relay station retransmission unit 47 is used for relay station and retransmits N to the base station
0
The explanation of this patent innovative point:
(1) travelling carriage is divided into two parts with data, travelling carriage sends to relay station, and what be transmitted to the base station with relay station is exactly respectively these two parts, therefore the base station sends to travelling carriage after the partial data of base station and partial data that relay station is transmitted to the base station merge, except obtaining diversity gain, can also obtain coding gain.
(2) introduce CRC check and re-transmission, reduced the data probability of errors.
(3) according to channel conditions adaptively changing N
1And N
2Ratio and N
0Size, can tackle the variation of channel flexibly.
Obviously, those skilled in the art can carry out various changes and modification to the embodiment of the invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (9)
1, a kind of self-adapting synergizing method is characterized in that, comprising:
Travelling carriage is according to channel conditions, and self adaptation is determined division proportion, and data are divided into N
1And N
2, send N to base station and relay station
1
The base station is according to N
1Judging needs relay station to work in coordination with;
Relay station is according to N
1Judging needs travelling carriage to retransmit;
Travelling carriage is according to channel conditions, and self adaptation is determined division proportion, with N
2Be divided into
Individual N
0, retransmit N to relay station
0
Relay station sends N to the base station
0
The base station is according to N
0Judging needs relay station to retransmit;
Relay station retransmits N to the base station
0
2, according to claim 1, it is characterized in that the data of travelling carriage comprise CRC (CyclicalRedundancy Check, cyclic redundancy check (CRC)) part.
3, according to claim 1, it is characterized in that travelling carriage is divided into N with data
1And N
2, be to realize by RCPC codes (Rate Compatible Punctured Convolutional codes, rate adaptation convolution code).
4, according to claim 1, it is characterized in that the N that the base station sends according to travelling carriage
1Carrying out CRC detects:
If CRC detects correct, then transfer of data is correct;
If it is incorrect that CRC detects, then need relay station to work in coordination with.
5, according to claim 1, it is characterized in that the N that relay station sends according to travelling carriage
1Carrying out CRC detects:
If CRC detects correct, then relay station sends N to the base station
0
If it is incorrect that CRC detects, then carry out travelling carriage earlier and retransmit N
0, carry out relay station again and send N to the base station
0
As described in the claim 5, it is characterized in that 6, travelling carriage retransmits N
0, base station and relay station can both receive,
As number of retransmissions K
1Be less than or equal to maximum retransmission
The time:
If the K that the base station sends according to travelling carriage
1* N
0The N of travelling carriage transmission before
1Carry out CRC and detect correctly, then transfer of data is correct;
If the K that the base station sends according to travelling carriage
1* N
0The N of travelling carriage transmission before
1It is incorrect to carry out the CRC detection, but the K that relay station sends according to travelling carriage
1* N
0The N of travelling carriage transmission before
1Carry out CRC and detect correctly, then relay station sends N to the base station
0
As number of retransmissions K
1Greater than maximum retransmission
The time, data transmission fault then.
7, according to claim 1, it is characterized in that the N that the base station sends according to relaying
0Carrying out CRC detects:
If the N that the base station sends according to relay station
0The N of travelling carriage transmission before
1+ K
1* N
0Carry out CRC and detect correctly, then transfer of data is correct;
If the N that the base station sends according to travelling carriage
0The N of travelling carriage transmission before
1+ K
1* N
0Carry out CRC and detect correctly, then relay station retransmits N to the base station
0
8, as described in the claim 7, it is characterized in that relay station retransmits N to the base station
0,
As number of retransmissions K
2Be less than or equal to maximum retransmission
The time, if the K that the base station sends according to relay station
2* N
0The N of travelling carriage transmission before
1+ K
1* N
0, the N that sends of relay station
0Carry out CRC and detect correctly, then transfer of data is correct;
As number of retransmissions K
2Greater than maximum retransmission
The time, data transmission fault then.
9, a kind of collaborative device is characterized in that, comprising:
The travelling carriage transmitting element is used for travelling carriage according to channel conditions, and self adaptation is determined division proportion, and data are divided into N
1And N
2, send N to base station and relay station
1
Judge the collaborative unit of relay station, be used for the base station according to N
1Judging needs relay station to work in coordination with;
Judge the travelling carriage retransmission unit, be used for relay station according to N
1Judging needs travelling carriage to retransmit;
The travelling carriage retransmission unit is used for travelling carriage according to channel conditions, and self adaptation is determined division proportion, with N
2Be divided into
Individual N
0, retransmit N to relay station
0
The relay station transmitting element is used for relay station and sends N to the base station
0
Judge the relay station retransmission unit, be used for the base station according to N
0Judging needs relay station to retransmit;
The relay station retransmission unit is used for relay station and retransmits N to the base station
0
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| CNA2009100863058A CN101567776A (en) | 2009-06-10 | 2009-06-10 | Self-adapting synergizing method and self-adapting synergizing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102572963A (en) * | 2012-01-11 | 2012-07-11 | 东南大学 | Cooperation rate self-adaptive transmission method suitable for an orthogonal frequency division multiplexing-ultra-wide bandwidth (OFDM-UWB) system |
| CN102694620A (en) * | 2011-03-25 | 2012-09-26 | 中国移动通信集团公司 | Data partitioning method of coding cooperation transmission and apparatus thereof |
-
2009
- 2009-06-10 CN CNA2009100863058A patent/CN101567776A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694620A (en) * | 2011-03-25 | 2012-09-26 | 中国移动通信集团公司 | Data partitioning method of coding cooperation transmission and apparatus thereof |
| CN102694620B (en) * | 2011-03-25 | 2014-12-31 | 中国移动通信集团公司 | Data partitioning method of coding cooperation transmission and apparatus thereof |
| CN102572963A (en) * | 2012-01-11 | 2012-07-11 | 东南大学 | Cooperation rate self-adaptive transmission method suitable for an orthogonal frequency division multiplexing-ultra-wide bandwidth (OFDM-UWB) system |
| CN102572963B (en) * | 2012-01-11 | 2014-04-16 | 东南大学 | Cooperation rate self-adaptive transmission method suitable for an orthogonal frequency division multiplexing-ultra-wide bandwidth (OFDM-UWB) system |
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Application publication date: 20091028 |