CN101252420B - System and method of multi-user multi-aerial transmission - Google Patents
System and method of multi-user multi-aerial transmission Download PDFInfo
- Publication number
- CN101252420B CN101252420B CN2008101032926A CN200810103292A CN101252420B CN 101252420 B CN101252420 B CN 101252420B CN 2008101032926 A CN2008101032926 A CN 2008101032926A CN 200810103292 A CN200810103292 A CN 200810103292A CN 101252420 B CN101252420 B CN 101252420B
- Authority
- CN
- China
- Prior art keywords
- user
- access control
- service
- media access
- control layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000005540 biological transmission Effects 0.000 title claims abstract description 25
- 239000013598 vector Substances 0.000 description 12
- 239000011159 matrix material Substances 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a multi-user multi-antenna transmission method which includes that; step1, the threshold of the space correlation degree is set; the service priority of the user is determined according to the parameters of the user media access control layer; step2, the user which has the highest priority is selected as the first selected user; step3, the space correlation degree of the unselected users and the lately selected user are computed; the users whose space correlation degrees are lower than the space correlation degree threshold construct a under-selected user set; step4, the user which has the highest priority in the under-selected set is selected as the selected user; step5, the step 3 and the step 4 are repeated to finish the selection of the user; the data of the selected user is encoded and transmitted; thereby, the over-layer optimum of the multi-user multi-antenna transmission is realized; the service requirement of the user is fulfilled; meanwhile, the interference among the users is reduced.
Description
Technical Field
The invention relates to the technical field of wireless communication multi-antenna, in particular to a multi-user multi-antenna transmission system and a multi-user multi-antenna transmission method.
Background
MIMO (Multiple-input and Multiple-output) technology increases system capacity through spatial multiplexing and multi-user diversity, with inherent advantages.
In a multi-user MIMO system, it is assumed that M is arranged at a base stationtAn antenna, and M is arranged at each userrFor each antenna, the channel matrix for user k can be represented as Mr×MtMatrix H ofkThe signal received by user k is
yk＝Hkx+nk
Wherein, ykIs MrThe x 1 vector represents the signal received by user k, nkIs MrThe x 1 vector represents the interference noise received by user k, x is MtThe x 1 vector represents a signal transmitted by the base station.
The wireless transmission channel is decomposed into orthogonal eigen-subchannels by SVD (Singular Value Decomposition) method:
Wherein u isk，iRepresents HkThe ith left singular vector ofk，iRepresents HkOf the ith right singular vector, σk，iRepresents HkThe ith singular value of (1), rank (H)k) Representation matrix HkIs determined.
The eigen transmission mode is that a group of right and left singular vectors are used as the weights of the sending and receiving antennas for transmission, and the equivalent channel gain is the singular value corresponding to the right and left singular vectors.
Decoding at the user side using the left singular vectors, assuming that the user transmits data on one eigen-subchannel, user k1Decoding at the receiving end to obtain:
Wherein,
for user k1In the case of a received signal, the signal,for user k1Corresponding singularity of the intrinsic sub-channelThe value of the one or more of,
for user k1The left singular vector corresponding to the eigen-subchannel,
for user k1The right singular vector corresponding to the eigen-subchannel,
for user k2The right singular vector corresponding to the eigen-subchannel,
sending to user k for base station2N is the number of users,for user k1The received interference noise.
The spatial correlation reflects the degree of information interference between two users. The right singular vector is the spatial feature code of the user.
With the increasing demand for wireless communication services, a new generation of wireless communication network should be able to provide a plurality of different user Service types, such as voice Service, data Service, multimedia Service, etc., which have different QoS (Quality of Service) requirements.
In order to satisfy QoS requirements of various users in a multi-antenna system, and simultaneously reduce interference between the users as much as possible, an effective multi-user transmission mechanism is required in the multi-antenna system. However, in the prior art, the consideration is performed from a single physical layer or a Media Access Control (MAC) layer, which cannot simultaneously satisfy the QoS requirement of each user and the maximum overall transmission capacity of the system, so that the physical layer and the MAC layer need to be considered jointly, and the optimized data transmission of cross-layer multi-user in the multi-antenna system is realized by estimating the channel state information of each user in the physical layer and combining the MAC layer parameters of each user.
Disclosure of Invention
In order to solve the problems, the invention discloses a multi-user multi-antenna transmission system and a multi-user multi-antenna transmission method, and aims to realize cross-layer optimization of multi-user multi-antenna transmission and ensure the QoS requirements of each user while achieving the overall minimization of interference among users.
The invention discloses a multi-user multi-antenna transmission method, which comprises the following steps:
step 1, setting a spatial correlation threshold, and determining the service priority of a user according to parameters of a user media access control layer;
step 2, selecting the user with the highest service priority as a first selected user;
step 3, calculating the spatial correlation degree between the unselected users and the most recently selected user, wherein the unselected users with the spatial correlation degree lower than the spatial correlation degree threshold value form a user set to be selected;
step 4, selecting the user with the highest service priority in the user set to be selected as the selected user;
and 5, judging whether the number of the selected users is equal to the number of the transmitting antennas, if so, coding and then transmitting the data of the selected users, and otherwise, executing the step 3.
The parameter of the user media access control layer is the service quality grade of the user media access control layer,
the process of determining the service priority of the user in the step 1 is further that the service quality grade of the user media access control layer is corresponding to the service priority of the user, and the higher the service quality grade is, the higher the corresponding service priority is.
The parameter of the user media access control layer is the service queue length of the user media access control layer,
the process of determining the service priority of the user in the step 1 is further that the service queue length of the media access control layer of the user is corresponding to the service priority of the user, and the longer the service queue is, the higher the corresponding service priority is.
The invention also discloses a multi-user multi-antenna transmission system, which comprises:
the setting module is used for setting a spatial correlation threshold and determining the service priority of the user according to the parameters of the user media access control layer;
a selecting module, which selects the user with the highest service priority as the first selected user, calculates the spatial correlation between the unselected users and the most recently selected user, the unselected users whose spatial correlation is lower than the spatial correlation threshold form a user set to be selected, selects the user with the highest service priority in the user set to be selected, and repeats the process of forming the user set to be selected and selecting the users in the user set to be selected until the number of the selected users is equal to the number of transmitting antennas;
and the sending module is used for coding and sending the data of the selected user.
The parameter of the user media access control layer is the service quality grade of the user media access control layer,
the setting module is further configured to correspond the user media access control layer service quality level to a service priority of the user, where the higher the service quality level is, the higher the corresponding service priority is.
The parameter of the user media access control layer is the service queue length of the user media access control layer,
the setting module is further configured to correspond the length of the service queue of the user media access control layer to a service priority of the user, where the longer the service queue, the higher the corresponding service priority.
The invention has the advantages that the system and the method for multi-user multi-antenna transmission are provided, the cross-layer optimization of the multi-user multi-antenna transmission can be realized, the spatial multiplexing of multiple users can be realized, and the QoS requirements of each user can be ensured while the interference among the users is minimized.
Drawings
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a system flow diagram of the present invention;
FIG. 3 is a flowchart of a method of example 1 of the present invention;
fig. 4 is a flowchart of the method of embodiment 2 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The process flow of the present invention is shown in FIG. 1.
Step S101, setting a spatial correlation threshold, and determining the service priority of the user according to the parameters of the MAC layer of the user;
step S102, selecting the user with the highest service priority as a first selected user;
step S103, calculating the spatial correlation degree between the unselected users and the most recently selected user, wherein the unselected users with the spatial correlation degree lower than the spatial correlation degree threshold value form a user set to be selected;
step S104, selecting the user with the highest service priority in the user set to be selected as a selected user;
step S105, judging whether the user selection is finished, if so, executing step S106, otherwise, executing step S103;
and step S106, encoding the data of the selected user and then transmitting the encoded data.
The system of the present invention is illustrated in block diagram form in fig. 2.
A setting module 201, configured to set a spatial correlation threshold, and determine a service priority of the user according to a parameter of a user media access control layer;
the selecting module 202 selects a user with the highest service priority as a first selected user, calculates spatial correlation between unselected users and a user selected most recently, wherein the unselected users with the spatial correlation lower than the spatial correlation threshold form a to-be-selected user set, selects the user with the highest service priority in the to-be-selected user set as a selected user, and repeats the processes of forming the to-be-selected user set and selecting the user in the to-be-selected user set to complete user selection;
and a sending module 203, configured to code and send data of the selected user.
Example 1
In embodiment 1, users are selected according to their MAC layer QoS levels and the spatial correlation between the selected users.
The specific process flow is shown in fig. 3.
Step S301, according to the QoS requirement of the user, dividing the QoS into different QoS classes, wherein each class corresponds to a service priority, and the higher the QoS class is, the higher the corresponding service priority is.
Step S302, selecting the user with the highest service priority as the selected user.
Step S303, obtaining the channel matrix of each user, calculating the spatial correlation between the unselected users and the most recently selected user according to formula 1 and formula 2, sorting the spatial correlation, and selecting the unselected users with the spatial correlation lower than the spatial correlation threshold to form a user set to be selected.
And if the user set to be selected already exists before the formation, replacing the original user set to be selected by the newly formed user set to be selected.
If step S303 is performed for the first time, the most recently selected user is the first selected user selected in step S302.
Step S304, the users in the user set to be selected are sorted according to the service priority, and the user with the highest service priority is selected as the selected user.
Step S305, determining whether the number of the selected users is equal to the number of the transmitting antennas, if so, executing step S306, otherwise, executing step S303.
Step S306, encoding and sending user data, wherein the encoding method can adopt an inter-user interference elimination encoding method.
Example 2
In embodiment 2, users are selected according to the length of the user service queue in the MAC layer of the user and the spatial correlation between the selected users.
The specific method flow is shown in fig. 4.
Step S401, according to the length of the user service queue, the service queue is divided into different grades, each grade corresponds to a service priority, and the longer the length of the service queue, the higher the corresponding service priority.
Step S402, selecting the user with the highest service priority as the selected user.
Step S403, obtaining the channel matrix of each user, calculating the spatial correlation between the unselected users and the most recently selected user according to formula 1 and formula 2, sorting the spatial correlation, selecting the unselected users whose spatial correlation is lower than the spatial correlation threshold, and forming a user set to be selected.
And if the user set to be selected already exists before the formation, replacing the original user set to be selected by the newly formed user set to be selected.
If step S403 is performed for the first time, the most recently selected user is the first selected user selected in step S402.
Step S404, sorting the users in the user set to be selected according to the service priority, and selecting the user with the highest service priority as the selected user.
Step S405, determining whether the number of the selected users is equal to the number of the transmitting antennas, if so, executing step S406, otherwise, executing step S403.
Step S406, encoding and sending the user data, where the encoding method may adopt an inter-user interference cancellation encoding method.
Various modifications may be made to the above without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is therefore intended to be limited not by the above description, but rather by the scope of the appended claims.
Claims (6)
1. A method for multi-user multi-antenna transmission, comprising:
step 1, setting a spatial correlation threshold, and determining the service priority of a user according to parameters of a user media access control layer;
step 2, selecting the user with the highest service priority as a first selected user;
step 3, calculating the spatial correlation degree between the unselected users and the most recently selected user, wherein the unselected users with the spatial correlation degree lower than the spatial correlation degree threshold value form a user set to be selected;
step 4, selecting the user with the highest service priority in the user set to be selected as the selected user;
and 5, judging whether the number of the selected users is equal to the number of the transmitting antennas, if so, coding and then transmitting the data of the selected users, and otherwise, executing the step 3.
2. The method for multi-user multi-antenna transmission according to claim 1,
the parameter of the user media access control layer is the service quality grade of the user media access control layer;
the process of determining the service priority of the user in the step 1 is further that the service quality grade of the user media access control layer is corresponding to the service priority of the user, and the higher the service quality grade is, the higher the corresponding service priority is.
3. The method for multi-user multi-antenna transmission according to claim 1,
the parameter of the user media access control layer is the service queue length of the user media access control layer;
the process of determining the service priority of the user in the step 1 is further that the service queue length of the media access control layer of the user is corresponding to the service priority of the user, and the longer the service queue is, the higher the corresponding service priority is.
4. A system for multi-user multi-antenna transmission, comprising:
the setting module is used for setting a spatial correlation threshold and determining the service priority of the user according to the parameters of the user media access control layer;
a selecting module, which selects the user with the highest service priority as the first selected user, calculates the spatial correlation between the unselected users and the most recently selected user, the unselected users whose spatial correlation is lower than the spatial correlation threshold form a user set to be selected, selects the user with the highest service priority in the user set to be selected, and repeats the process of forming the user set to be selected and selecting the users in the user set to be selected until the number of the selected users is equal to the number of transmitting antennas;
and the sending module is used for coding and sending the data of the selected user.
5. The system for multi-user multi-antenna transmission according to claim 4,
the parameter of the user media access control layer is the service quality grade of the user media access control layer;
the setting module is further configured to correspond the user media access control layer service quality level to a service priority of the user, where the higher the service quality level is, the higher the corresponding service priority is.
6. The system for multi-user multi-antenna transmission according to claim 4,
the parameter of the user media access control layer is the service queue length of the user media access control layer;
the setting module is further configured to correspond the length of the service queue of the user media access control layer to a service priority of the user, where the longer the service queue, the higher the corresponding service priority.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101032926A CN101252420B (en) | 2008-04-02 | 2008-04-02 | System and method of multi-user multi-aerial transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101032926A CN101252420B (en) | 2008-04-02 | 2008-04-02 | System and method of multi-user multi-aerial transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101252420A CN101252420A (en) | 2008-08-27 |
| CN101252420B true CN101252420B (en) | 2012-02-22 |
Family
ID=39955618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101032926A Expired - Fee Related CN101252420B (en) | 2008-04-02 | 2008-04-02 | System and method of multi-user multi-aerial transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101252420B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101557611B (en) * | 2009-05-15 | 2011-01-19 | 北京邮电大学 | Downlink multiuser selection method used for multi-aerial system |
| CN101635608B (en) * | 2009-09-02 | 2014-07-09 | 北京邮电大学 | Method and device for selecting MCS and wireless communication system |
| CN107370495A (en) * | 2017-08-02 | 2017-11-21 | 上海斐讯数据通信技术有限公司 | Antenna assignment device and method, radio reception device |
| CN114978249A (en) * | 2021-02-19 | 2022-08-30 | 中兴通讯股份有限公司 | User selection method, information transmission method, communication node, and storage medium |
| CN115835296B (en) * | 2022-11-23 | 2023-08-15 | 上海山源电子科技股份有限公司 | Information interference processing method, device, equipment and medium for 5G network |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1437345A (en) * | 2003-03-21 | 2003-08-20 | 清华大学 | Space-time iterative multiuser detecting algorithm based on soft sensitive bit and space grouping |
| CN1862997A (en) * | 2005-05-11 | 2006-11-15 | 中兴通讯股份有限公司 | Method for discriminating space relativity and method for regulating working mode of multi-antenna system |
| WO2007117218A1 (en) * | 2006-04-12 | 2007-10-18 | Panasonic Corporation | Transmission of multicast/broadcast services in a wireless communication network |
-
2008
- 2008-04-02 CN CN2008101032926A patent/CN101252420B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1437345A (en) * | 2003-03-21 | 2003-08-20 | 清华大学 | Space-time iterative multiuser detecting algorithm based on soft sensitive bit and space grouping |
| CN1862997A (en) * | 2005-05-11 | 2006-11-15 | 中兴通讯股份有限公司 | Method for discriminating space relativity and method for regulating working mode of multi-antenna system |
| WO2007117218A1 (en) * | 2006-04-12 | 2007-10-18 | Panasonic Corporation | Transmission of multicast/broadcast services in a wireless communication network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101252420A (en) | 2008-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7991066B2 (en) | Transmitter, receiver and method for controlling multiple input multiple output system | |
| US9509380B2 (en) | Methods for opportunistic multi-user beamforming in collaborative MIMO-SDMA | |
| US7907912B2 (en) | Apparatus and method for eliminating multi-user interference | |
| US8290539B2 (en) | Beam selection in open loop MU-MIMO | |
| US9191091B2 (en) | Radio communication system using multi-antenna transmission technique, and multi-user scheduler therefor | |
| US7986972B2 (en) | Method for transmitting data in a communication system | |
| EP1366579B1 (en) | Method for controlling the weighting of a data signal in the at least two antenna elements of a radio connection unit, module and communications system | |
| US20070280360A1 (en) | Method of Processing Received Signals in a Multi-Input Multi-Output (Mimo) System | |
| EP2034682A2 (en) | Beamforming using a codebook in a multiple-user MIMO communication system | |
| CN101252383B (en) | System and method of multi-user multi-aerial transmission | |
| EP1820287A1 (en) | Transmitter, receiver and method for controlling multiple input multiple output system | |
| CN103259576A (en) | Method of assigning precoding vectors in a mobile cellular network | |
| CN101822011A (en) | Method and system for managing precoding in multi-user wireless communications system | |
| JP2011518466A (en) | Signal transmission method for reducing feedback overhead and feedback information transmission method therefor | |
| WO2010000568A1 (en) | Method of reducing intra-cell spatial interference in a mobile cellular network | |
| US20110158189A1 (en) | Methods and Apparatus for Multi-Transmitter Collaborative Communications Systems | |
| CN102696180B (en) | Space channel State Feedback Approach and device | |
| CN101252420B (en) | System and method of multi-user multi-aerial transmission | |
| US20100266056A1 (en) | Method and apparatus for scheduling multiple users in a multiple-input multiple-output system | |
| KR100961889B1 (en) | Apparatus and method for performing sequential scheduling in multiple-input multiple-output system | |
| CN100349387C (en) | Detecting method and device for vertical-bell laboratory layered space-time code | |
| CN102104450B (en) | Sending method in MU-MIMO system and equipment | |
| CN104113399B (en) | User choosing method based on Matrix condition number in multi-user MIMO system | |
| KR20090042936A (en) | Efficient cqi signaling in mimo systems with variable numbers of beams | |
| KR101688221B1 (en) | Non-orthogonal multiple access expansion method through cooperation level increase |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: BEIJING ZHONGKE JINGSHANG TECHNOLOGY Co.,Ltd. Assignor: Institute of Computing Technology, Chinese Academy of Sciences Contract record no.: 2011110000143 Denomination of invention: System and method of multi-user multi-aerial transmission License type: Exclusive License Open date: 20080827 Record date: 20110823 |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EC01 | Cancellation of recordation of patent licensing contract | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: BEIJING SYLINCOM TECHNOLOGY CO.,LTD. Assignor: Institute of Computing Technology, Chinese Academy of Sciences Contract record no.: 2011110000143 Date of cancellation: 20181212 |
|
| EM01 | Change of recordation of patent licensing contract | ||
| EM01 | Change of recordation of patent licensing contract |
Change date: 20181212 Contract record no.: 2011110000143 Assignee after: BEIJING SYLINCOM TECHNOLOGY CO.,LTD. Assignee before: BEIJING ZHONGKE JINGSHANG TECHNOLOGY Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120222 |