CN101667903B - Method and device for transmitting data, and method and device for retransmitting data - Google Patents
Method and device for transmitting data, and method and device for retransmitting data Download PDFInfo
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- CN101667903B CN101667903B CN 200810215041 CN200810215041A CN101667903B CN 101667903 B CN101667903 B CN 101667903B CN 200810215041 CN200810215041 CN 200810215041 CN 200810215041 A CN200810215041 A CN 200810215041A CN 101667903 B CN101667903 B CN 101667903B
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Abstract
The invention discloses a method and a device for transmitting data, and a method and a device for retransmitting the data. The method for transmitting the data comprises the following steps: dividing users into a first user group and a second user group according to the channel situations of the users; pairing the users in the first user group and the second user group two by two; determining a user pair set, wherein one user in each user pair belongs to the first user group and the other belongs to the second user group, and the channel characteristic index of each user pair in the user pair set accords with a predetermined condition, the user pairs in the user pair set contain no same user with each other; and transmitting the data to a network side by each user pair. By using the technical scheme of the invention, the users are grouped and paired according to the magnitude of a signal-to-noise ratio and the data are transmitted to the network side by the user pairs, so that the dimensionality of an orthogonal system is reduced and the capacity of an uplink channel and the throughput of the users are increased.
Description
Technical field
The present invention relates to the communications field, particularly, relate to a kind of data transmission method for uplink and device, data repeating method and device.
Background technology
Because multiple-input and multiple-output (Multiple Input and Multiple Output, referred to as MIMO) system can the Effective Raise channel capacity, make it become Long Term Evolution (Long-TermEvolution, referred to as LTE) technology of paying close attention to of people extremely in the research, and use precoding technique to carry out multiplexing between multiple data stream and the antenna and can more effectively utilize the existing channel resource.
At present, in the precoding technique that the multi-user uses, known all users' of transmitter of transmitting terminal channel information, and according to all users' channel information, by the multi-user signal separation algorithm signal between the multi-user is separated, eliminate the interference between the user, reach simultaneously with the purpose that keeps pouring in defeated multiple user signals.
But for up link, because the restriction of complexity, generally subscriber equipment (User Equipment is referred to as UE) can only have a cover power amplification emitter as transmitter.That is to say, although UE has many antennas, when emission, usually only can use one of them antenna, like this, can increase the dimension of orthogonal system, reduce capacity and the user throughput of up channel.
Summary of the invention
When considering the transfer of data of carrying out up link in the correlation technique, the problem that up channel capacity and user throughput are restricted and make the present invention, for this reason, main purpose of the present invention is to provide a kind of data transmission method for uplink and device, data repeating method and device, in order to solve the problems referred to above in the correlation technique.
According to an aspect of the present invention, provide a kind of data transmission method for uplink.
Data transmission method for uplink according to the present invention comprises: according to all users' channel situation, all users are divided into first user group and the second user group; User in first user group and the second user group is matched in twos, determine user pair set, wherein, a user of each user's centering belongs to the first user group, another user belongs to the second user group, the characteristic of channel index that each user in the user pair set is right satisfies predetermined condition, and the user in the user pair set is not to comprising each other same subscriber; Each user's subtend network side sends data.
Wherein, the operation that all users is divided into first user group and the second user group is specially: in all users, the a plurality of users that signal to noise ratio are higher than the snr threshold that sets in advance are defined as the first user group, and a plurality of users that signal to noise ratio are lower than the snr threshold that sets in advance are defined as the second user group.
In addition, the characteristic of channel index that each user is right satisfies predetermined condition and refers to: the corresponding channel matrix of user's centering first user is H
1=[h
11h
21]
T, channel matrix corresponding to user's centering the second user is H
2=[h
12h
22]
T, wherein, h11, h21 are the corresponding channel coefficients of first user, h12, h22 are the corresponding channel coefficients of the second user;
Situation under, the user is to for satisfying the user couple of predetermined condition, wherein, △ is the channel index threshold.
According to an aspect of the present invention, provide a kind of data repeating method, the method can be used for utilizing above-mentioned data transmission method for uplink to carry out carrying out data re-transmission after the data transmission.
Data repeating method according to the present invention comprises: network side obtains the right data total amount of at least one user that terminal sends; For each user couple, detect the first data volume of the higher first user of user's centering signal to noise ratio, and the first data volume is decoded; In the situation to the first data volume decoding error, send the first nack message to terminal, two users of request user centering retransmit; Otherwise, the data total amount is deducted the first data volume, obtain the second data volume of the second lower user of signal to noise ratio, and the second data volume decoded, in the situation to the second data volume decoding error, send the second nack message to terminal, ask the second user to retransmit.
According to another aspect of the present invention, provide a kind of data sending device, wherein, this device can be positioned at end side.
Data sending device according to the present invention comprises: grouping module, be used for the channel situation according to all users, and all users are divided into first user group and the second user group; Matching module, be used for the user of first user group and the second user group is matched in twos, determine user pair set, wherein, a user of each user's centering belongs to the first user group, another user belongs to the second user group, and the characteristic of channel index that each user in the user pair set is right satisfies predetermined condition, and the user in the user pair set is not to comprising each other same subscriber; Sending module is used for each user's subtend network side and sends data.
Wherein, above-mentioned grouping module specifically is used for all users, and a plurality of users that signal to noise ratio are higher than the snr threshold that sets in advance are defined as the first user group, and a plurality of users that signal to noise ratio are lower than the snr threshold that sets in advance are defined as the second user group.
According to another aspect of the present invention, provide a kind of data sink, wherein, this device can be positioned at network side.
Data re-transmission device according to the present invention comprises: acquisition module is used for obtaining the right data total amount of at least one user that terminal sends; Detection module deducts the first data volume for detection of the first data volume of the higher first user of each user's centering signal to noise ratio and/or with the data total amount, obtains the second data volume of the second lower user of signal to noise ratio; Decoder module is used for the first data volume is decoded and/or the second data volume is decoded; Retransmission module is used for sending the first nack message to terminal, and two users of request user centering retransmit, and/or sends the second nack message to terminal and ask the second user is retransmitted.
By technique scheme of the present invention, the height by signal to noise ratio divides into groups to the user and matches, and sends data by user's subtend network side, thereby has reduced the dimension of orthogonal system, has increased capacity and the user throughput of up channel.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of writing, claims and accompanying drawing.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the working method of uplink multi-users V-MIMO;
Fig. 2 is the structured flowchart according to the data sending device of apparatus of the present invention embodiment one;
Fig. 3 is the process chart according to the data transmission method for uplink of the inventive method embodiment one;
Fig. 4 is the schematic diagram according to user's pairing of the data transmission method for uplink of the inventive method embodiment one;
Fig. 5 is the structured flowchart according to the data re-transmission device of apparatus of the present invention embodiment two;
Fig. 6 is the process chart according to the data repeating method of the inventive method embodiment two;
Fig. 7 is the process chart of data repeating method according to the preferred embodiment of the invention;
Fig. 8 is another process chart according to the data repeating method of the inventive method embodiment two;
Fig. 9 is the signaling transmission schematic diagram according to the applicable cases one of the data repeating method of the inventive method embodiment two;
Figure 10 is the signaling transmission schematic diagram according to the applicable cases two of the data repeating method of the inventive method embodiment two.
Embodiment
Functional overview
As mentioned above, at present, when carrying out the transfer of data of up link, the problem that up channel capacity and user throughput are restricted, the present invention is directed to this problem, proposed a kind of data transmission method for uplink and device, data repeating method and device, this scheme is divided into groups to the user according to the height of signal to noise ratio and is matched, and by user's subtend network side transmission data, network side detects the data that receive.
Before inventive embodiment is described, first the working method of the virtual multiple-input and multiple-output of uplink multi-users (V-MIMO) described.
Fig. 1 shows the working method of uplink multi-users V-MIMO, and as shown in Figure 1, up V-MIMO allows two users with single transmit antenna to transmit at same subchannel.Yet base station (Node B) need to and distribute two users at pairing occupation mode dispatching.Two users among the V-MIMO need to utilize orthogonal guide frequency to carry out channel estimating.
Use the method for quadrature pairing to be between the user: each subscriber equipment (UE) only uses 1 transmit antennas, Node B that 2 reception antennas are arranged when sending data, and then the channel matrix between user 1 and NodeB is H
1=[h
11h
21]
T, the channel matrix between user 2 and NodeB is H
2=[h
12h
22]
T, wherein, h11, h21 are the channel coefficients of user's 1 correspondence, h12, h22 are respectively the channel coefficients of user's 2 correspondences.
At network side, the antenna reception user 1 of Node B is at channel parameter h
11The data of the lower transmission of reference and user 2 at the h of channel parameter
12The data of the lower transmission of reference, another root antenna reception user 1 is at the h of channel parameter
21The data of the lower transmission of reference and user 2 at the h of channel parameter
22The data of the lower transmission of reference.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, is not intended to limit the present invention.
Device embodiment one
According to present embodiment, a kind of data sending device is provided, this device is positioned at end side.
Fig. 2 shows the structural framing figure according to the data sending device of apparatus of the present invention embodiment one, and as shown in Figure 2, this device comprises: grouping module 20, matching module 22, sending module 24.
Below in conjunction with Fig. 2 above-mentioned module is elaborated.
Grouping module 20 is used for the channel situation according to all users, and all users are divided into first user group and the second user group; Particularly, this grouping module 20 is used for all users, and a plurality of users that signal to noise ratio are higher than the snr threshold that sets in advance are defined as the first user group, and a plurality of users that signal to noise ratio are lower than the snr threshold that sets in advance are defined as the second user group.
Matching module 22, be connected to grouping module 20, be used for the user of first user group and the second user group is matched in twos, determine user pair set, wherein, a user of each user's centering belongs to the first user group, and another user belongs to the second user group, the characteristic of channel index that each user in the user pair set is right satisfies predetermined condition, and the user in the user pair set is not to comprising each other same subscriber.
Sending module 24 is connected to matching module 22, is used for each user's subtend network side and sends data.
The data sending device that provides by present embodiment, can be before terminal sends data, the user is divided into groups and match according to channel situation, and utilize the user after the pairing to send data to network side, thereby reduced the dimension of orthogonal system, increased capacity and the user throughput of up channel.
Need to prove that the embodiment of the invention has 2 reception antennas to describe as example take Node B, but is not limited to this, Node B has the situation of 2 above antennas of antenna still within protection scope of the present invention.
Embodiment of the method one
According to present embodiment, a kind of data transmission method for uplink is provided, the method can use above-mentioned data sending device to realize.
Fig. 3 shows the handling process according to the data transmission method for uplink of the inventive method embodiment one, and as shown in Figure 3, this processing procedure may further comprise the steps:
Step S302 according to all users' channel situation, is divided into first user group and the second user group with all users.
Step S304, user in first user group and the second user group is matched in twos, determine user pair set, wherein, a user of each user's centering belongs to the first user group, another user belongs to the second user group, and the characteristic of channel index that each user in the user pair set is right satisfies predetermined condition, and the user in the user pair set is not to comprising each other same subscriber.
Step S306, each user's subtend network side sends data.
The below is elaborated to above-mentioned steps.
(1) step S302
All users are divided into the processing of first user group and the second user group, particularly, in all users, the a plurality of users that signal to noise ratio are higher than the snr threshold that sets in advance are defined as the first user group, and a plurality of users that signal to noise ratio are lower than the snr threshold that sets in advance are defined as the second user group.
(2) step S304
Fig. 4 is the schematic diagram that the user matches, as shown in Figure 4, all users are divided into two groups, the first user group is comprised of the user that signal to noise ratio is higher than the snr threshold that sets in advance, the second user group is comprised of the user that signal to noise ratio is lower than the snr threshold that sets in advance, user j in user i in the first user group and the second user group is matched, and user i and user j form a user couple.
Wherein, the characteristic of channel index that each user is right satisfies predetermined condition and refers to:
The corresponding channel matrix of user's centering first user is H
1=[h
11h
21]
T, channel matrix corresponding to user's centering the second user is H
2=[h
12h
22]
T, wherein, h
11, h
21Be the corresponding channel coefficients of first user, h12, h22 are respectively the corresponding channel coefficients of the second user;
Need to prove that the predetermined condition that each user is set right characteristic of channel index will satisfy is in order to eliminate the interference between the user.
Particularly, do not have noisy prerequisite to be fully between two users so:
When satisfying this condition, pairing is carried out not disturbing between two users in the situation that the multi-user sends simultaneously as V-MIMO.Two users are matched the new channel matrix of rear formation is:
But it is too harsh not having noisy condition between two users fully, with predetermined condition relax for: a threshold delta (value of Δ need to be determined according to different situations) is set, when
Value satisfy the pairing condition during less than Δ.
The method that provides by present embodiment can be divided into groups to the user and pairing becomes user couple according to channel situation, and send data by user's subtend network side, thereby reduced the dimension of orthogonal system, has increased capacity and the user throughput of up channel.
Device embodiment two
According to present embodiment, a kind of data re-transmission device is provided, this device is positioned at network side.
Fig. 5 shows the structure according to the data re-transmission device of apparatus of the present invention embodiment two, and as shown in Figure 5, this device comprises acquisition module 50, detection module 52, decoder module 54, retransmission module 56.
Below in conjunction with Fig. 5 the function of above-mentioned module is elaborated.
Acquisition module 50 is used for obtaining the right data total amount of at least one user that terminal sends;
Detection module 52 is connected to heavy acquisition module 50, deducts the first data volume for detection of the first data volume of the higher first user of each user's centering signal to noise ratio and/or with the data total amount, obtains the second data volume of the second lower user of signal to noise ratio;
Decoder module 54 is connected to detection module 52, is used for the first data volume is decoded and/or the second data volume is decoded;
Retransmission module 56 is connected to decoder module 54, is used for sending the first nack message to terminal, and two users of request user centering retransmit, and/or sends the second nack message to terminal and ask the second user is retransmitted.
By the device that present embodiment provides, network side can be determined the correctness of the right data of the user that receives, and has reduced the dimension of orthogonal system, has increased capacity and the user throughput of up channel.
Embodiment of the method two
According to present embodiment, a kind of data repeating method is provided, the data receiver normal direction network side that terminal utilizes embodiment of the method one to provide is provided sends after the data, network side judges whether the data that receive are retransmitted.
Fig. 6 shows the handling process according to the data repeating method of the inventive method embodiment two, as shown in Figure 6, comprises following handling process:
Step S602, network side obtains the right data total amount of at least one user that terminal sends;
Step S604 for each user couple, detects the first data volume of the higher first user of user's centering signal to noise ratio, and the first data volume is decoded;
Wherein, can utilize serial interference (SIC) algorithm that user data is detected, (that is the user who, is comprised of the high user of signal to noise ratio organizes data and quantizes the SIC algorithm to first user's group first, and, it is cut from total amount as correct amount.Perhaps also can utilize MMSE-SIC algorithm, ZF-SIC algorithm etc. that user data is detected;
Step S606 in the situation to the first data volume decoding error, sends the first nack message to terminal, and two users of request user centering retransmit; Otherwise, the data total amount is deducted the first data volume, obtain the second data volume of the second lower user of signal to noise ratio, and the second data volume decoded, in the situation to the second data volume decoding error, send the second nack message to terminal, ask the second user to retransmit.
By the method that present embodiment provides, network side can be determined the correctness of the right data of the user that receives, and has reduced the dimension of orthogonal system, has increased capacity and the user throughput of up channel.
Fig. 7 shows the according to the preferred embodiment of the invention handling process of data repeating method, and as shown in Figure 7, this processing procedure comprises step 701a to 713.
Below in conjunction with Fig. 7 above-mentioned steps is elaborated.
701a, user uplink V-MIMO system receive the user to data, simultaneously execution in step 701b.
701b estimates channel quality status, determines the user that channel quality is good, execution in step 702.
702, detection module (with reference to figure 5) detects data the user who receives, and specifically can adopt MMSE-SIC or ZF-SIC scheduling algorithm, execution in step 703.
703, detection module is picked out user i (user's that signal to noise ratio is high) information, and execution in step 704.
704, extract the data of user i, execution in step 705 by hard decision.
705, carry out CRC check for the data hard decision result of user i (user that channel quality is good), and execution in step 706 or 707.
706, such as the CRC check erroneous results, return NACK to user i and user j (user that signal to noise ratio is low), and to user i and user j request repeat data, data retransmission stream will take a subframe at sending time slots next time and send, and so far, handling process finishes.
707, the result is correct such as CRC check, returns ACK to user i, receives the data of user i, and execution in step 708.
708, network side has been received data after the data of user i carried out SIC and detect (partial parallel interference cancellation processing), in order to extracting the data of user j, and execution in step 709.
709, obtain the information of user j and execution in step 710.
710, extract the data of user j and execution in step 711 by hard decision.
711, carry out CRC check for the data hard decision result of user j (user of bad channel quality), in the situation of CRC check erroneous results, carry out 712, otherwise, carry out 713.
712, such as the CRC check erroneous results, return NACK to user j, and to user j request repeat data, data retransmission stream will take a subframe at sending time slots next time and send, and so far, handling process finishes.
713, the result is correct such as CRC check, returns ACK to user j, and receives the data of user j, and so far, flow process finishes.
Fig. 8 shows another handling process according to the data repeating method of the inventive method embodiment two, and as shown in Figure 8, this processing procedure comprises:
802, the data of user i are carried out CRC check, and, under check results is correct situation, execution in step 804, otherwise, execution in step 806.
804, the data of re-transmission user i and user j, flow process finishes.
806, the data of user j are carried out CRC check, in correct situation, execution in step 808, otherwise, execution in step 810.
808, user i and j send new data, and flow process finishes.
810, user i sends new data, and user j sends data retransmission, and flow process finishes.
In the situation that Fig. 9 shows that user (user i) data flow verification in user's centering first user group is correct, the data flow verification of the user (user j) in the second user group makes mistakes, the signaling of detection and mixed automatic retransmission sends schematic diagram, as shown in Figure 9, detecting correct and new data user j of the new data of user i makes mistakes, at this moment, network side receives the data of user i, and to user j request repeat data, like this, the data that receive in next sending time slots are exactly the new data of user i and the data that user j retransmits.
Figure 10 shows in the situation that the equal verification of data flow of the user (user j) in user's (user i) data flow in user's centering first user group and the second user group makes mistakes, the schematic diagram of detection and mixed automatic retransmission, as shown in figure 10, detecting the new data of user i and the new data of user j makes mistakes, at this moment, network side is to user i and user j request repeat data, like this, the data that receive in next sending time slots are exactly the retransmission data of user i and the data that user j retransmits.
In sum, by means of technical scheme of the present invention, by the user being divided into groups according to the height of signal to noise ratio in terminal and matching, user's subtend network side sends data, network side detects the data that receive, thereby reduced the dimension limit of orthogonal system, increased capacity and the user throughput of up channel.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a data transmission method for uplink is characterized in that, comprising:
According to all users' channel situation, described all users are divided into first user group and the second user group;
User in described first user group and described the second user group is matched in twos, determine user pair set, wherein, a user of each user's centering belongs to described first user group, another user belongs to described the second user group, the characteristic of channel index that each user in the described user pair set is right satisfies predetermined condition, and the user in the described user pair set is not to comprising each other same subscriber;
Each user's subtend network side sends data.
2. method according to claim 1 is characterized in that, described all users is divided into first user group and the second user group is specially:
In described all users, a plurality of users that signal to noise ratio are higher than the snr threshold that sets in advance are defined as the first user group, and a plurality of users that signal to noise ratio are lower than the snr threshold that sets in advance are defined as the second user group.
3. method according to claim 1 is characterized in that, the characteristic of channel index that each user is right satisfies predetermined condition and refers to:
The corresponding channel matrix of described user's centering first user is H
1=[h
11h
21]
T, channel matrix corresponding to described user's centering the second user is H
2=[h
12h
22]
T, wherein, h
11, h
21Be the corresponding channel coefficients of described first user, h
12, h
22Be the corresponding channel coefficients of described the second user;
4. a data repeating method is used for carrying out to 3 each described data transmission method for uplink according to claim 1 carrying out data re-transmission after the data transmission in utilization, it is characterized in that, comprising:
Network side obtains the right data total amount of at least one user that terminal sends;
For each user couple, detect the first data volume of the higher first user of described user's centering signal to noise ratio, and described the first data volume is decoded;
In the situation to described the first data volume decoding error, send the first nack message to described terminal, ask two users of described user's centering to retransmit; Otherwise, described data total amount is deducted described the first data volume, obtain the second data volume of the second lower user of signal to noise ratio, and described the second data volume decoded, in the situation to described the second data volume decoding error, send the second nack message to described terminal, ask described the second user to retransmit.
5. a data sending device is positioned at end side, it is characterized in that, comprising:
Grouping module is used for the channel situation according to all users, and described all users are divided into first user group and the second user group;
Matching module, be used for the user of described first user group and described the second user group is matched in twos, determine user pair set, wherein, a user of each user's centering belongs to described first user group, another user belongs to described the second user group, and the characteristic of channel index that each user in the described user pair set is right satisfies predetermined condition, and the user in the described user pair set is not to comprising each other same subscriber;
Sending module is used for each user's subtend network side and sends data.
6. device according to claim 5, it is characterized in that, described grouping module specifically is used for described all users, the a plurality of users that signal to noise ratio are higher than the snr threshold that sets in advance are defined as the first user group, and a plurality of users that signal to noise ratio are lower than the snr threshold that sets in advance are defined as the second user group.
7. a data re-transmission device is positioned at network side, it is characterized in that, comprising:
Acquisition module is used for obtaining the right data total amount of at least one user that terminal sends;
Detection module deducts described the first data volume for detection of the first data volume of the higher first user of each user's centering signal to noise ratio and/or with described data total amount, obtains the second data volume of the second lower user of signal to noise ratio;
Decoder module is used for described the first data volume is decoded and/or described the second data volume is decoded;
Retransmission module is used for sending the first nack message to described terminal, asks two users of described user's centering to retransmit, and/or sends the second nack message to described terminal and ask described the second user is retransmitted.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101577615B (en) * | 2009-06-02 | 2013-09-11 | 中兴通讯股份有限公司 | Data transfer method and device |
| CN102215095A (en) * | 2010-04-09 | 2011-10-12 | 中兴通讯股份有限公司 | Data retransmission control method and system |
| CN102377463B (en) * | 2010-08-09 | 2014-12-31 | 中兴通讯股份有限公司 | Pairing method in multiuser multiple input and multiple output system and apparatus thereof, data transmission method and apparatus thereof |
| CN102386958A (en) * | 2010-09-01 | 2012-03-21 | 中兴通讯股份有限公司 | Method for notifying site to receive data and access point |
| CN102439867B (en) | 2011-06-17 | 2015-04-08 | 华为技术有限公司 | Method and device for virtualizing multiple input and multiple output communication |
| CN103297367A (en) * | 2012-02-22 | 2013-09-11 | 中兴通讯股份有限公司 | Uplink data receiving processing method and device |
| CN112312332B (en) * | 2019-07-26 | 2022-04-05 | 大唐移动通信设备有限公司 | Multi-user pairing method and device |
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| US6317418B1 (en) * | 1997-04-28 | 2001-11-13 | Nokia Mobile Phones Limited | Method for transmitting packet switched data in a mobile communications system |
| CN101034935A (en) * | 2006-03-06 | 2007-09-12 | 华为技术有限公司 | Data multiplexing method of multi-user device for the mobile communication network and its system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6317418B1 (en) * | 1997-04-28 | 2001-11-13 | Nokia Mobile Phones Limited | Method for transmitting packet switched data in a mobile communications system |
| CN101034935A (en) * | 2006-03-06 | 2007-09-12 | 华为技术有限公司 | Data multiplexing method of multi-user device for the mobile communication network and its system |
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