CN106160813A - A kind of protenchyma networking radio transmitting method based on interference alignment techniques - Google Patents
A kind of protenchyma networking radio transmitting method based on interference alignment techniques Download PDFInfo
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- CN106160813A CN106160813A CN201610410931.8A CN201610410931A CN106160813A CN 106160813 A CN106160813 A CN 106160813A CN 201610410931 A CN201610410931 A CN 201610410931A CN 106160813 A CN106160813 A CN 106160813A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0452—Multi-user MIMO systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2695—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with channel estimation, e.g. determination of delay spread, derivative or peak tracking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention proposes protenchyma networking radio transmitting method based on interference alignment techniques, relates to wireless communication field.This method includes: center control nodes chooses the transmission node pair carrying out cooperation transmission；Multiple cooperation transmitting nodes frame emission synchronizing signal and orthogonal pilot signals simultaneously；Multiple cooperative reception nodes carry out synchronizing and mimo channel estimation；Center control nodes calculates pre-coding matrix and AF panel matrix；Respectively cooperation transmitting node utilizes pre-coding matrix simultaneously with the information after the transmitting precoding of frequency；Each cooperative reception node utilizes AF panel matrix to realize being properly received useful information.The present invention passes through center control nodes, interference alignment techniques is utilized to realize many transmission nodes of NB IoT to simultaneously with the information transmission of frequency, system is transmitted compared to conventional point-to-point FDD and TDD, it is effectively improved power system capacity and spectrum efficiency, reduce propagation delay time and power consumption of terminal, meet the demand of NB IoT magnanimity link.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to a kind of arrowband based on interference alignment techniques multipoint cooperative communication
Internet of Things radio transmitting method.
Background technology
Interference alignment techniques (Interference alignment, IA) is to solve co-channel interference in wireless communication system
Important means, can effectively suppress presence of intercell interference under identical networking mode, improves the handling capacity of Cell Edge User, obtains and use
The degree of freedom gain that amount amount is linear, improves power system capacity.This technology is third generation partner program (3rd
Generation Partnership Project, 3GPP) the collaborative multicast communication Key Implementation of proposition in lte-a system
One of technology.
Protenchyma networking (Narrow Band Internet of Things, NB-IoT) is implemented in cellular network, only needs
Consume a small amount of mandate frequency range, GSM network, UMTS network or LTE network can be deployed directly into, reduce lower deployment cost.Based on honeycomb
NB-IoT significantly connect due to it that node is many, cover wide, the excellent technical advantage of low cost, framework, following will bring more
Abundant application scenarios a, it has also become important branch of all things on earth internet.Meanwhile, study burning hot 4.5G and 5G at present to remove
Have outside the peak rate of up to 1Gbps and 10Gbps, also mean that more multi-link number of based on honeycomb Internet of Things, support sea
Amount M2M (Machine-to-Machine) connects and more low time delay, following by boosting HD video, VoLTE and Internet of Things
The most universal Deng application.But, the spectral bandwidth resource of about 180KHz and TDD and the FDD message transmission mode of routine, sternly
Heavily constrain NB-IoT connect in magnanimity, application in the future scene such as the information transmission of low time delay and higher rate.
Summary of the invention
In order to solve, NB-IoT authorized frequency bands is narrow, connect number is many, frequency spectrum resource is nervous problem, the present invention provide a kind of based on
The NB-IoT radio transmitting method of IA technology.Method proposes a kind of wireless transmitting system having center control nodes, based on
Interference alignment techniques achieves many transmission nodes of NB-IoT to simultaneously with the collaboration communication of frequency.
The present invention is achieved through the following technical solutions, and a kind of protenchyma networking based on interference alignment techniques is wirelessly transferred
Method, comprises the following steps:
(1) protenchyma networking wireless transmitting system is built；Described protenchyma networking wireless transmitting system includes 1 center
Controlling node and the transmission node pair of more than 3, described transmission node forms by two transmission nodes, a transmission node
For transmitting node, another transmission node is receiving node；
(2) center control nodes chooses the transmission node carrying out cooperation transmission to rear in the regional extent that it covers, to
The each transmission node chosen sends indication signal；Using selected transmitting node as cooperation transmitting node, selected reception
Node is as cooperative reception node；
(3) each cooperation transmitting node is simultaneously to each cooperative reception node frame emission synchronizing signal and orthogonal pilot signals；
(4) each cooperative reception node synchronizes respectively according to the frame synchronizing signal received, according to the orthogonal guide frequency received
Signal carries out mimo channel respectively and estimates to obtain channel condition information, and by information feedback to center control nodes；
(5) center control nodes is according to interference alignment precoding algorithms and the channel status of all cooperative reception node feeding back
After information calculates a pre-coding matrix and an AF panel matrix, send pre-coding matrix to each cooperation to launch and save
Point, sends AF panel matrix to each cooperative reception node；
(6) each cooperation transmitting node utilizes pre-coding matrix that transmission information carries out precoding, and simultaneously with frequency to respectively
Cooperative reception node launches the transmission information after precoding；
(7), after the transmission information after each cooperative reception node receives precoding, AF panel matrix is utilized to realize useful
The reception of information.
Wherein, described center control nodes is base station, via node or the main connection node having power supply unit to support, and uses
In controlling transmission node to selecting and the realization of precoding algorithms；Each transmission node configures the antenna of more than two.
Wherein, the center control nodes described in step (2) is chosen in the regional extent that it covers and is carried out cooperation transmission
Transmission node pair, particularly as follows: the cooperative cluster selection mode that center control nodes defines according to 3GPP LTE-A chooses transmission node
Right.
Wherein, the interference alignment precoding algorithms described in step (5) includes classic algorithm and the iterative of closed solutions
Algorithm, the transmission node of cooperation transmission, to during equal to 3, selects the classic algorithm having closed solutions to calculate as interference alignment precoding
Method；The transmission node of cooperation transmission, to during more than 3, selects iterative algorithm as interference alignment precoding algorithms.
The present invention compares the advantage of background technology and is:
The present invention devises a kind of wireless transmitting system having center control nodes, it is achieved many transmission nodes pair of NB-IoT
(more than or equal to 3), simultaneously with the collaboration communication of frequency, solves NB-IoT efficiency in conventional single point point to-point communication low, connects number
Limited shortcoming, is effectively improved spectrum efficiency and power system capacity, reduces propagation delay time and power consumption of terminal simultaneously, so that
Obtain NB-IoT, in future, there is broader practice prospect.
Accompanying drawing explanation
Fig. 1 is the execution flow chart of the present invention.
Fig. 2 is that NB-IOT based on IA transmission system transmits throughput of system comparison curves with NB-IOT based on TDMA.
Detailed description of the invention
The present invention is further illustrated with reference to the accompanying drawings and in conjunction with the embodiments.
A kind of NB-IoT radio transmitting method based on IA technology, concrete execution flow chart is as shown in Figure 1.Including walking as follows
Rapid:
Step 1, structure protenchyma networking wireless transmitting system；
The radio transmitting method of the present invention must be at center control nodes (base station, via node or have power supply unit to prop up
The main connection node etc. of support) control under, it is achieved the collaboration communication of multiple transmission nodes pair, drop while efficiency of transmission to improve
Low power consumption of terminal；Including at least 3 transmission nodes pair in this wireless transmitting system, the most at least 2*k (k is more than or equal to 3) individual biography
Defeated node, each transmission node all configures two or the antenna of more than two.Transmission node is to by a transmitting node, and one connects
Receipts node forms.
Controlling node in the present embodiment centered by base station, wireless transmitting system comprises 3 transmission nodes pair, each transmission
Node all configures two antennas, to realize MIMO transmission, improves cooperative transmission system degree of freedom.
Step 2, center control nodes select to carry out the transmission node pair of cooperation transmission in the regional extent that it covers, to
The each transmission node chosen sends indication signal；
In the transmission node that NB-IoT network is numerous, the cooperative cluster selection mode that base station defines according to 3GPP LTE-A
(such as half dynamic cooperative) chooses the transmission node pair carrying out integration and cooperation transmission, and to the transmission node feedback instruction letter chosen
Number.Selected transmitting node is as cooperation transmitting node, and selected receiving node is as cooperative reception node.
Step 3, each cooperation transmitting node frame emission synchronizing signal and orthogonal pilot signals simultaneously；
Frame synchronizing signal is with reference to the most conventional single carrier frame synchronizing signal production method；Select permanent envelope zero auto-correlation sequence
Sequence based on row (CAZAC sequence), the pilot frequency sequence produced such as chu sequence etc., respectively cooperates on other antennas of transmitting node
Pilot frequency sequence be all the cyclic shift of this basic sequence, cyclic shift amount is relevant with the characteristic of channel, should be greater than channel multi-path and prolongs
Time, length N of basic sequence should be greater than the antenna number of total transmitting node and the product of cyclic shift amount.
Step 4, each cooperative reception node utilize frame synchronizing signal to synchronize respectively, enter respectively according to orthogonal pilot signals
Row mimo channel is estimated to obtain channel condition information, and by information feedback to center control nodes:
The orthogonal pilot signals of the superposition of each 6 antennas of cooperative reception Node extraction, the most orthogonal with every antenna leads
Frequency sequence is multiplied, to obtain the channel condition information (Channel State Information, CSI) of mimo channel.
Step 5, center control nodes are according to interference alignment precoding algorithms and the channel of all cooperative reception node feeding back
Status information calculates pre-coding matrix U and the AF panel matrix V of each cooperative reception node of each cooperation transmitting node, and difference
Feed back to correspondence cooperation transmitting node and cooperative reception node:
Only 3 transmission nodes pair in the present embodiment, select classics interference alignment precoding algorithms direct solution U and V.When
Transmission node, to during more than 3, selects iterative algorithm to solve U and V.
Step 6, each cooperation transmitting node utilize matrix U that transmission information carries out precoding, and simultaneously pre-with transmitting frequently
Transmission information after coding:
After in the present embodiment, each cooperation transmitting node carries out precoding to transmission information, by the transmission information after precoding by
One tunnel becomes two-way, and being launched by two antennas with frequency simultaneously.
Step 7, each cooperative reception node utilize matrix V to realize being properly received useful information.
Each cooperative reception node is multiplied with AF panel matrix V by the reception data on two antennas, it is achieved to interference
The suppression of signal (the transmitting data of other cooperation transmitting nodes) and the reception of corresponding cooperation transmitting node data.
Fig. 2 is that NB-IOT based on IA transmission system transmits system with NB-IOT based on time-sharing multiplex (TDMA), at it
Handling capacity comparison curves in the case of his communication condition is identical.It can be seen that NB-IOT based on IA transmission system because of
It is 3 transmission nodes to using cooperation transmission, can be simultaneously with the transmission information of frequency, its throughput of system can approach TDMA
1.5 times of NB-IOT transmission system, are effectively increased spectrum efficiency, reduce propagation delay time.
Although the foregoing describing the detailed description of the invention of the present invention, but those familiar with the art should managing
Solving, the described in the invention example that is embodied as is illustrative rather than for limiting the scope of the invention, according to this
The modification of the equivalence that bright spirit is made and change, all should contain in the scope of the claimed protection of the present invention.
Claims (4)
1. a protenchyma networking radio transmitting method based on interference alignment techniques, it is characterised in that comprise the following steps:
(1) protenchyma networking wireless transmitting system is built；Described protenchyma networking wireless transmitting system includes that 1 center controls
Node and the transmission node pair of more than 3, described transmission node forms by two transmission nodes, and a transmission node is for sending out
Penetrating node, another transmission node is receiving node；
(2) center control nodes chooses the transmission node carrying out cooperation transmission to rear in the regional extent that it covers, to choosing
Each transmission node send indication signal；Using selected transmitting node as cooperation transmitting node, selected receiving node
As cooperative reception node；
(3) each cooperation transmitting node is simultaneously to each cooperative reception node frame emission synchronizing signal and orthogonal pilot signals；
(4) each cooperative reception node synchronizes respectively according to the frame synchronizing signal received, according to the orthogonal pilot signals received
Carry out mimo channel respectively to estimate to obtain channel condition information, and by information feedback to center control nodes；
(5) center control nodes is according to interference alignment precoding algorithms and the channel condition information of all cooperative reception node feeding back
After calculating a pre-coding matrix and an AF panel matrix, pre-coding matrix is sent to each cooperation transmitting node, will
AF panel matrix sends to each cooperative reception node；
(6) each cooperation transmitting node utilizes pre-coding matrix that transmission information carries out precoding, and simultaneously with frequency to each cooperation
Receiving node launches the transmission information after precoding；
(7), after the transmission information after each cooperative reception node receives precoding, AF panel matrix is utilized to realize useful information
Reception.
A kind of protenchyma networking radio transmitting method based on interference alignment techniques the most according to claim 1, its feature
It is: described center control nodes is base station, via node or the main connection node having power supply unit to support, is used for controlling to pass
Defeated node is to selecting and the realization of precoding algorithms；Each transmission node configures the antenna of more than two.
A kind of protenchyma networking radio transmitting method based on interference alignment techniques the most according to claim 1, its feature
It is: the center control nodes described in step (2) chooses the transmission node carrying out cooperation transmission in the regional extent that it covers
It is right, particularly as follows: the cooperative cluster selection mode that center control nodes defines according to 3GPP LTE-A chooses transmission node pair.
A kind of protenchyma networking radio transmitting method based on interference alignment techniques the most according to claim 1, its feature
It is: the interference alignment precoding algorithms described in step (5) includes classic algorithm and the iterative algorithm of closed solutions, cooperation
The transmission node of transmission, to during equal to 3, selects the classic algorithm having closed solutions as interference alignment precoding algorithms；Cooperation transmission
Transmission node to during more than 3, select iterative algorithm as interference alignment precoding algorithms.
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Cited By (4)
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| CN108112019A (en) * | 2018-01-02 | 2018-06-01 | 重庆邮电大学 | One kind disturbs bypassing method based on cellular narrowband Internet of Things and different standard |
| CN108200650A (en) * | 2016-12-08 | 2018-06-22 | 中国移动通信有限公司研究院 | A kind of resource allocation methods and device |
| CN109743272A (en) * | 2019-01-21 | 2019-05-10 | 哈尔滨工业大学 | Private network system high-precision interference in broadband is aligned Suppression of narrow band interference algorithm |
| CN113708880A (en) * | 2021-07-30 | 2021-11-26 | 电子科技大学 | Frequency spectrum co-occurrence realization method based on co-occurrence interference suppression |
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Cited By (6)
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Application publication date: 20161123 |