CN104883397A - CoMP transmission method based on cloud computing - Google Patents
CoMP transmission method based on cloud computing Download PDFInfo
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- CN104883397A CN104883397A CN201510240303.5A CN201510240303A CN104883397A CN 104883397 A CN104883397 A CN 104883397A CN 201510240303 A CN201510240303 A CN 201510240303A CN 104883397 A CN104883397 A CN 104883397A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Multimedia (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a CoMP transmission method based on cloud computing. Whether there is a cooperation cluster user in an adjacent sector is judged via a cloud cooperation processing center, and data processing scheme for different users are executed according to the judging result. Edge user covering performance is effectively improved; system interference is reduced; and the system capacity is improved.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to a kind of CoMP transmission method based on cloud computing.
Background technology
In recent years, along with the development of mobile communication technology, although the tenability of communication system to radio communication service is significantly improved, user there has also been higher expectation to two-forty, high-quality multimedia service simultaneously.Therefore, in the research of next generation mobile communication technology, higher requirement be it is also proposed to aspects such as spectrum efficiency, transmission rate, throughput of system and covering edge performances.
For covering edge customer, valid signal strengths is little, simultaneously large from the interference signal intensity of adjacent sectors/sector, which has limited the signal to noise ratio (SINR) covering edge customer, cause its throughput degradation, make edge customer can not get satisfied service quality, seriously constrain the raising of systematic function and system fairness.Therefore, interval AF panel becomes problem demanding prompt solution in TD-LTE system.
Coordinate multipoint (CoMP) transmission technology can effectively improve covering marginal user performance, improve throughput of system, to cause extensive concern and the research of industry in recent years, and one of important research project becoming 3GPPLTE-Advanced standardization effort.
Cloud computing technology is the cooperation computing of new rise in recent years, the product that the traditional computers such as it is Distributed Calculation, parallel computation, load balancing and network technology merge.Cloud computing technology is used for wireless network and also brings useful technique effect, such as, greatly alleviated the bottleneck of single site disposal ability by multi-site collaborative process.
Therefore, how utilizing above-mentioned technology to reduce system interference and improve power system capacity is research emphasis of the present invention.
Summary of the invention
The object of the invention is to be achieved through the following technical solutions.
According to the embodiment of the present invention, propose a kind of CoMP transmission method based on cloud computing, described method comprises the steps:
A. obtained the channel condition information (CSI) of current business sector and each adjacent sectors respectively by the NodeB of current business sector and adjacent sectors, and described CSI is reported cloud collaborative process center;
B. described cloud collaborative process center judges the user whether having cooperation cluster in adjacent sectors;
If C. there is the user of cooperation cluster adjacent sectors, described current business sector NodeB performs collaboration set group user's data processing scheme, to obtain the transmission data of specific user;
If D. adjacent sectors does not cooperate the user of cluster, described current business sector NodeB performs non-cooperating cluster user data processing scheme, to obtain the transmission data of specific user.
According to the embodiment of the present invention, the cloud collaborative process center of described step B judges whether have the user of cooperation cluster specifically to comprise in adjacent sectors:
B1. cloud collaborative process center judges whether each adjacent sectors has the user of cooperation cluster, as long as there is an adjacent sectors to have then feedback acknowledgment information, and records the adjacent sectors identification code of cooperation cluster user, otherwise feedback nonacknowledgement information;
B2. feedback result and sector id information are sent to current business sector NodeB by cloud collaborative process center, then send to specific user and real-time update by current business sector NodeB by BCCH channel;
According to the embodiment of the present invention, the execution collaboration set group user's data processing scheme of described step C, specifically comprises with the transmission data obtaining specific user:
C1. the CoMP mode utilizing interference to eliminate obtains the detection signal of the signal from current business sector and each adjacent sectors;
C2. divide carrying out set from the detection signal of different sector signals in step C1;
C3. the transmission data of specific user are obtained according to CSI and set division result.
According to the embodiment of the present invention, described step C2 to the detection signal from different sector signals carry out set divide specifically comprise:
C21. the signal of adjacent sectors and current business sector signals that comprise cooperation cluster user are divided in the set of dash signal, the adjacent sectors signal not comprising cooperation cluster user is assigned in interference sector signal set;
C22. the signal comprised in the set of useful signal is divided again, divide by received signal strength size, by the signal of sector to be detected and current business sector, and the signal strength signal intensity adjacent sectors division of signal that is greater than threshold value is in the set of CoMP participating and equal gain combination, and remaining assigning to is given up in set.
According to the embodiment of the present invention, the execution non-cooperating cluster user data processing scheme of described step D, specifically comprises with the transmission data obtaining specific user:
D1. carry out set division to the signal of different cluster that sends to from different sector, described set dividing mode is that the set divided based on received signal strength size divides;
D2. according to CSI and the set division result of multiple sector, the transmission data of specific user are obtained by many sectors CoMP mode of unit linear equalization.
CoMP transmission method based on cloud computing of the present invention judges by cloud collaborative process center the user whether having cooperation cluster in adjacent sectors, and performing different user data processing schemes according to judged result, effective improvement covers marginal user performance, reduces system interference and improve power system capacity.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Figure 1 show the CoMP transmission method flow diagram based on cloud computing according to embodiment of the present invention.
Embodiment
Below with reference to accompanying drawings illustrative embodiments of the present disclosure is described in more detail.Although show illustrative embodiments of the present disclosure in accompanying drawing, however should be appreciated that can realize the disclosure in a variety of manners and not should limit by the execution mode of setting forth here.On the contrary, provide these execution modes to be in order to more thoroughly the disclosure can be understood, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
According to the embodiment of the present invention, propose a kind of CoMP transmission method based on cloud computing, as shown in Figure 1, described method comprises the steps:
A. obtained the channel condition information (CSI) of current business sector and each adjacent sectors respectively by the NodeB of current business sector and adjacent sectors, and described CSI is reported cloud collaborative process center;
B. described cloud collaborative process center judges the user whether having cooperation cluster in adjacent sectors;
If C. there is the user of cooperation cluster adjacent sectors, described current business sector NodeB performs collaboration set group user's data processing scheme, to obtain the transmission data of specific user;
If D. adjacent sectors does not cooperate the user of cluster, described current business sector NodeB performs non-cooperating cluster user data processing scheme, to obtain the transmission data of specific user.
According to the embodiment of the present invention, the CSI obtaining current business sector and each adjacent sectors by the NodeB of current business sector and adjacent sectors respectively of described steps A specifically comprises:
A1. all square estimated value of minimal error of pilot signal is calculated according to Received signal strength;
A2. according to present frame pilot signal CSI data and reserved deferred frame pilot signal CSI data at temporal interpolation, the pilot matrix after calculating modulation;
A3. estimate channel Doppler spread according to all square estimated value of pilot signal minimal error, then select time domain channel filter factor according to doppler spread, calculate time domain CSI value.
According to the embodiment of the present invention, the calculating all square estimated value of minimal error of pilot signal according to Received signal strength and specifically comprise of described steps A 1:
A11.NodeB, according to different pilot signal patterns, generates pilot signal pseudorandom sequence according to TD-LTE standard;
A12. all square estimated value of minimal error of pilot signal is calculated according to the pilot signal of the signal that receives and generation.
According to the embodiment of the present invention, described steps A 2 according to present frame pilot signal CSI data and reserved deferred frame pilot signal CSI data at temporal interpolation, the pilot matrix after calculating modulation specifically comprises:
A21. determine pilot signal modulation system according to different antenna ports;
A22. within coherence time, first the channel information of actual pilot position is all just estimated by minimal error, then use the mode of linear interpolation according to all square estimated value of the minimal error of actual pilot position, in time domain, interpolation calculates the CSI of virtual pilot frequency position.
According to the embodiment of the present invention, described steps A 3 estimate channel Doppler spread according to all square estimated value of pilot signal minimal error, then select time domain channel filter factor according to doppler spread, calculate time domain CSI value and specifically comprise:
A31. in the given time, a Doppler shift is estimated;
A32. calculate the sampling value of mean intensity as the mean intensity of this time slot of the 5th symbol in each time slot, judge whether this point is extreme point by the relative size of each intensity limit and left and right intensity limit;
A33. compare the intensity difference between adjacent extreme point, if intensity difference is greater than threshold value, then think to be a crest or trough herein, if be less than threshold value, think be only herein noise cause float, be not counted in Doppler's fluctuation number;
A34. according to the number of Wave crest and wave trough in the subframe of statistics, the Doppler shift value close to this value is provided; Estimator, according to crest and trough number, and presets exemplary Doppler frequency offseting value, therefrom chooses suitable frequency offseting value.
A34. select time domain channel filter factor according to the frequency offseting value chosen and channel time domain correlation matrix, and calculate time domain CSI according to time domain channel filter factor.
According to the embodiment of the present invention, the cloud collaborative process center of described step B judges whether have the user of cooperation cluster specifically to comprise in adjacent sectors:
B1. cloud collaborative process center judges whether each adjacent sectors has the user of cooperation cluster, as long as there is an adjacent sectors to have then feedback acknowledgment information, and records the adjacent sectors identification code of cooperation cluster user, otherwise feedback nonacknowledgement information;
B2. feedback result and sector id information are sent to current business sector NodeB by cloud collaborative process center, then send to specific user and real-time update by current business sector NodeB by BCCH channel;
According to the embodiment of the present invention, the execution collaboration set group user's data processing scheme of described step C, specifically comprises with the transmission data obtaining specific user:
C1. the CoMP mode utilizing interference to eliminate obtains the detection signal of the signal from current business sector and each adjacent sectors;
C2. divide carrying out set from the detection signal of different sector signals in step C1;
C3. the transmission data of specific user are obtained according to CSI and set division result.
According to the embodiment of the present invention, the detection signal that the CoMP mode that the utilization interference of described step C1 is eliminated obtains from the signal of current business sector and each adjacent sectors specifically comprises:
C11. according to the channel code configuration information of current business sector and adjacent sectors, the detection signal of the transmission signal from current business sector and each adjacent sectors is obtained by the mode of optimum linear filtering;
C12. judge whether cycle-index exceeds maximum restriction, if it is export the detection signal of the transmission signal of each sector, otherwise carry out step C13;
C13. the detection signal sending signal by sector each in CSI and C11 recovers the interference component responded from each sector receive signal, total Received signal strength deducts interference component, obtain the purified signal of the Received signal strength from each sector, using the input that the purified signal of the Received signal strength from each sector processes as next step, forward step C11 to.
According to the embodiment of the present invention, described step C2 to the detection signal from different sector signals carry out set divide specifically comprise:
C21. the signal of adjacent sectors and current business sector signals that comprise cooperation cluster user are divided in the set of dash signal, the adjacent sectors signal not comprising cooperation cluster user is assigned in interference sector signal set;
C22. the signal comprised in the set of useful signal is divided again, divide by received signal strength size, by the signal of sector to be detected and current business sector, and the signal strength signal intensity adjacent sectors division of signal that is greater than threshold value is in the set of CoMP participating and equal gain combination, and remaining assigning to is given up in set.
According to the embodiment of the present invention, the transmission data obtaining specific user according to CSI and set division result of described step C3 specifically comprise:
C31. according to channel code configuration information and CSI, the detection signal of each sector in the set of CoMP participating and equal gain combination is carried out respectively to the unit linear equalization CoMP of single sector, the specific user obtaining these sectors transmits data;
C32. the mode transmitting data acquisition equal gain combination to the specific user of the described sector that step C31 obtains obtains final specific user and transmits data.
According to the embodiment of the present invention, the unit linear equalization CoMP mode of the single sector described in described step C31 specifically comprises:
The signal of each sector in C311. dividing for CoMP participating and equal gain combination set, finds the activation cluster that described sector comprises, by the CSI of described sector and channel code configuration information obtain in described sector each activate the equivalent CSI of cluster;
C312. the transmission matrix activating cluster is constructed with the equivalent CSI of each cluster;
C313. according to transmission matrix, carry out CoMP by the CoMP mode of unit linear equalization to described sector signals, the specific user obtaining described sector transmits data.
According to the embodiment of the present invention, the execution non-cooperating cluster user data processing scheme of described step D, specifically comprises with the transmission data obtaining specific user:
D1. carry out set division to the signal of different cluster that sends to from different sector, described set dividing mode divides based on received signal strength size or divides based on the set activating spread spectrum code channel correlation;
D2. according to CSI and the set division result of multiple sector, the transmission data of specific user are obtained by many sectors CoMP mode of unit linear equalization.
According to the embodiment of the present invention, the set based on the division of received signal strength size of described step D1 divides and comprises: by the Output rusults of optimum linear filter, or obtain by CSI the equivalent CSI sending to each cluster signal, estimate the amplitude of each cluster signal; By cluster signal to be detected and specific user's signal, and amplitude is greater than the cluster division of signal of threshold value in the set of CoMP participating, by remaining cluster division of signal in interference cluster signal;
The described set based on activating spread spectrum code channel correlation divides and comprises: the equivalent CSI being obtained each activation spread spectrum code channel by the CSI of channel code configuration information, current business sector and each adjacent sectors, estimate that each activates the correlation between spread spectrum code channel, by cluster signal to be detected, and spread spectrum code channel correlation is greater than the corresponding cluster division of signal of threshold value in the set division of CoMP participating, by remaining cluster division of signal in interference cluster signal.
According to the embodiment of the present invention, many sectors CoMP of the described unit linear equalization of described step D2 specifically comprises:
D21. the cluster signal in being divided by the set of CoMP participating, the current business sector finding each cluster corresponding or the CSI of adjacent sectors, then obtain by channel code configuration information the equivalent CSI that each activates cluster or spread spectrum code channel;
D22. the cluster of CoMP participating or the transmission matrix of spread spectrum code channel is constructed with the equivalent CSI that each activates spread spectrum code channel;
D23. according to transmission matrix, by the CoMP mode of unit linear equalization, CoMP is carried out to total Received signal strength, obtain final specific user and transmit data.
Described channel code configuration information can include, but not limited to distinguish the orthogonal variable frequency extension factor code of different cluster and the pseudorandom sequence code distinguishing different sector; These channel code configuration informations are all carry out active coding check processing by cloud collaborative process center, the channelization code information activated is sent to current business sector NodeB, send to specific user by BCCH channel as system message by current business sector NodeB again, and these channelization code information can real-time update.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.
Claims (5)
1., based on a CoMP transmission method for cloud computing, described method comprises the steps:
A. obtained the channel condition information (CSI) of current business sector and each adjacent sectors respectively by the NodeB of current business sector and adjacent sectors, and described CSI is reported cloud collaborative process center;
B. described cloud collaborative process center judges the user whether having cooperation cluster in adjacent sectors;
If C. there is the user of cooperation cluster adjacent sectors, described current business sector NodeB performs collaboration set group user's data processing scheme, to obtain the transmission data of specific user;
If D. adjacent sectors does not cooperate the user of cluster, described current business sector NodeB performs non-cooperating cluster user data processing scheme, to obtain the transmission data of specific user.
2. a method of claim 1, the cloud collaborative process center of described step B judges whether have the user of cooperation cluster specifically to comprise in adjacent sectors:
B1. cloud collaborative process center judges whether each adjacent sectors has the user of cooperation cluster, as long as there is an adjacent sectors to have then feedback acknowledgment information, and records the adjacent sectors identification code of cooperation cluster user, otherwise feedback nonacknowledgement information;
B2. feedback result and sector id information are sent to current business sector NodeB by cloud collaborative process center, then send to specific user and real-time update by current business sector NodeB by BCCH channel.
3. a method as claimed in claim 2, the execution collaboration set group user's data processing scheme of described step C, specifically comprises with the transmission data obtaining specific user:
C1. the CoMP mode utilizing interference to eliminate obtains the detection signal of the signal from current business sector and each adjacent sectors;
C2. divide carrying out set from the detection signal of different sector signals in step C1;
C3. the transmission data of specific user are obtained according to CSI and set division result.
4. a method as claimed in claim 3, described step C2 to the detection signal from different sector signals carry out set divide specifically comprise:
C21. the signal of adjacent sectors and current business sector signals that comprise cooperation cluster user are divided in the set of dash signal, the adjacent sectors signal not comprising cooperation cluster user is assigned in interference sector signal set;
C22. the signal comprised in the set of useful signal is divided again, divide by received signal strength size, by the signal of sector to be detected and current business sector, and the signal strength signal intensity adjacent sectors division of signal that is greater than threshold value is in the set of CoMP participating and equal gain combination, and remaining assigning to is given up in set.
5. a method as claimed in claim 4, the execution non-cooperating cluster user data processing scheme of described step D, specifically comprises with the transmission data obtaining specific user:
D1. carry out set division to the signal of different cluster that sends to from different sector, described set dividing mode is that the set divided based on received signal strength size divides;
D2. according to CSI and the set division result of multiple sector, the transmission data of specific user are obtained by many sectors CoMP mode of unit linear equalization.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108577855A (en) * | 2018-05-07 | 2018-09-28 | 北京大学 | A kind of non-contact type body building monitoring method |
| CN108990114A (en) * | 2017-05-31 | 2018-12-11 | 安移通网络公司 | By the subset allocation of the access point in wireless network to high priority level |
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| CN101583194A (en) * | 2009-06-18 | 2009-11-18 | 清华大学 | Resource allocation method based on the cooperation between base stations of virtual subdistrict and system thereof |
| CN102014492A (en) * | 2009-09-04 | 2011-04-13 | 中国移动通信集团公司 | Cooperative multipoint communication system and method |
| CN102711189A (en) * | 2012-05-25 | 2012-10-03 | 中兴通讯股份有限公司 | Server for inter-cell multi-antenna cooperative processing, system and method |
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Patent Citations (3)
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| CN101583194A (en) * | 2009-06-18 | 2009-11-18 | 清华大学 | Resource allocation method based on the cooperation between base stations of virtual subdistrict and system thereof |
| CN102014492A (en) * | 2009-09-04 | 2011-04-13 | 中国移动通信集团公司 | Cooperative multipoint communication system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108990114A (en) * | 2017-05-31 | 2018-12-11 | 安移通网络公司 | By the subset allocation of the access point in wireless network to high priority level |
| CN108577855A (en) * | 2018-05-07 | 2018-09-28 | 北京大学 | A kind of non-contact type body building monitoring method |
| CN108577855B (en) * | 2018-05-07 | 2021-06-18 | 北京大学 | Non-contact type body-building exercise monitoring method |
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