CN106254053B - A kind of LTE-A carrier wave polymeric composition carrier allocation method based on CQI - Google Patents
A kind of LTE-A carrier wave polymeric composition carrier allocation method based on CQI Download PDFInfo
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- CN106254053B CN106254053B CN201610682992.XA CN201610682992A CN106254053B CN 106254053 B CN106254053 B CN 106254053B CN 201610682992 A CN201610682992 A CN 201610682992A CN 106254053 B CN106254053 B CN 106254053B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
Abstract
The present invention provides a kind of LTE-A carrier wave polymeric composition carrier allocation method based on CQI, comprising: will be divided into main plot carrier wave PCC and secondary cell carrier wave SCC at sub-carrier CC according to the coupling loss CL of carrier wave；2) current each channel quality indicator (CQI) value at sub-carrier CC is calculated；Effective Signal to Interference plus Noise Ratio is mapped directly into channel quality indicator (CQI)；The sequence of calculated channel quality indicator (CQI) value from high to low is arranged, is accessed at sub-carrier by CQI value is high, i.e., is preferentially carried out data transmission with channel condition is good at sub-carrier first when there is user to carry out data transmission.The availability of frequency spectrum and throughput of system can be improved in the present invention, and promotes the satisfaction of end user.
Description
Technical field
The present invention relates to mobile communication fields, and in particular to a kind of distribution method of LTE-A carrier wave polymeric composition carrier wave.
Background technique
LTE-A is the evolution version of long evolving system LTE, in order to meet LTE-A downlink 1Gbit/s, uplink
The peak rate of 500Mbit/s defines a crucial new features of LTE-A, i.e. carrier aggregation technology in 3GPP R10.By
In the frequency spectrum resource in current global range, the Continuous Band of 100M is not for LTE-A use, so carrier aggregation technology
Exactly multiple continuous or discrete carrier wave is condensed together, a broader frequency spectrum is formed, wide bandwidth can not only be met
Demand can also improve the utilization rate of fragment frequency spectrum, avoid frequency spectrum waste.
Due to having introduced carrier aggregation technology in LTE-A, the different modules of corresponding system will make corresponding change,
Wherein scheduling of resource also and before has apparent difference as the important module of communication.It is existing about Resource Allocation Formula master
Will there are two types of, one is federated resource distribute JCS scheme, another kind be independent resource distribute ICS scheme.Federated resource distributes
Polymerization is regarded as a carrier wave at sub-carrier CC, only carries out level-one scheduling of resource, and independent resource distribution is that have two-stage resource
Distribution, respectively at RB grades of scheduling of resource of CC grades of scheduling of resource of sub-carrier and resource block, Lai Shixian resource allocation.
Refer at CC grades of sub-carrier scheduling and business packet is assigned in corresponding carriers according to allocation algorithm, at present at sub-carrier
CC grades of resource allocation algorithms are largely all based on load balancing, and traditional algorithm includes random selection RS algorithm, circulation choosing
Select CS algorithm and minimum load LL algorithm etc..Traditional algorithm is all based on load balancing to improve system performance, but business is negative
The equilibrium of load is not sufficient to ensure that good system performance.For the carrier wave polymerization between frequency band, due to each covering at sub-carrier
Difference makes at user option ingredient carrier number different, so system is not only wanted when carrying out into CC grades of resource allocations of sub-carrier
Business load is considered, it is also contemplated that the propagation characteristic of wireless channel.
Summary of the invention
The purpose of the present invention is to provide a kind of handling capacities that community user can be improved, and improve the LTE- of user satisfaction
A carrier wave polymeric composition carrier allocation method.Technical scheme is as follows:
A kind of LTE-A carrier wave polymeric composition carrier allocation method based on CQI, including the following aspects:
1) main plot carrier wave PCC and secondary cell carrier wave SCC will be divided at sub-carrier CC according to the coupling loss CL of carrier wave: made
For select PCC foundation, using coupling loss CL it is the smallest at sub-carrier CC as main plot carrier wave PCC；Later most according to user
What is polymerize greatly adds secondary cell carrier wave SCC at sub-carrier CC number；
2) current each channel quality indicator (CQI) value at sub-carrier CC, method are calculated are as follows:
1. calculating effective Signal to Interference plus Noise Ratio SINReff:
Wherein i is that user uses the number at the subcarrier on sub-carrier
Mesh, SINRiFor the Signal to Interference plus Noise Ratio on subcarrier i, β is scale factor, and L is the ingredient carrier number of polymerization；
2. by effective Signal to Interference plus Noise Ratio SINReffIt is mapped directly into channel quality indicator (CQI), corresponding formula are as follows:
Wherein,Represent i-th of effective Signal to Interference plus Noise Ratio SINReffValue,What is indicated is that i-th of channel quality refers to
Show CQI value；
3) sequence of calculated channel quality indicator (CQI) value from high to low is arranged, when there is user to count
It is accessed at sub-carrier by CQI value is high, i.e., is preferentially carried out data transmission with channel condition is good at sub-carrier first according to when transmission.
Compared with prior art, the present invention is by coupling loss and channel quality instruction in conjunction with reflecting current component carrier wave CC
Channel quality, and preferentially carry out data transmission at sub-carrier by channel condition is good.The availability of frequency spectrum can be improved in the present invention
And throughput of system, and improve the satisfaction of end user.
Detailed description of the invention
Fig. 1 .LTE-A carrier wave polymerize schematic diagram.
Fig. 2 .LTE-A system carrier aggregation resource allocation flow chart.
Independent resource distribution method schematic diagram under Fig. 3 .LTE-A system carrier aggregation.
The present invention is based on the general flow charts of the ingredient carrier allocation method of channel quality indicator (CQI) by Fig. 4.
Specific embodiment
The present invention is a kind of LTE-A carrier wave polymeric composition carrier allocation method based on channel quality indicator (CQI), main to think
Want that, the study found that channel condition is better, the modulating-coding order of system is just in view of the channel quality of heterogeneity carrier wave is different
Higher, the order of modulating-coding is higher, and the handling capacity of system is bigger, for this purpose, proposing the component carrier distribution side based on CQI
Method.It is preferential to select CQI higher into sub-carrier in user data transmission, it realizes the data transmission of high-speed, improves system
Performance.
It is understandable to be more clear the purpose of the present invention, technical method and advantage, with reference to the accompanying drawing with specific steps into
The present invention will be described in detail for one step.
Fig. 1 is LTE-A carrier wave polymerization schematic diagram.Wherein the bandwidth of system is by being polymerized at sub-carrier, wherein often
It is a at sub-carrier with single carrier it is identical have corresponding subcarrier, can make continuously to be also possible at sub-carrier it is discrete,
What is be used in the present invention is continuously at sub-carrier.
Fig. 2 is lte-a system carrier wave aggregate resource distribution schematic diagram.Resource allocation can be divided into following process: money
The configuration of source scheduler, user are to each selection at sub-carrier and respectively at the distribution of resource block on sub-carrier.Specifically include with
Lower step:
Step 201: by carrier aggregation subdistrict actual conditions determine the cell at sub-carrier CC；
Step 202: configuring suitable resource to base station according at resource allocation methods used in sub-carrier and system
Scheduler；
Step 203: user being waited to initiate the request message of data access；
Step 204: base station considers the service condition of radio resource in wireless access network, according to selected CC distribution method
To allow the customer service accessed to distribute suitably at sub-carrier；
Step 205: after customer service is assigned to special component carrier wave, base station is to this at the resource block on sub-carrier
It is allocated；
Step 206: base station being gathered by the data cell on heterogeneity carrier wave in its medium access control MAC layer
It closes, carries out hybrid automatic repeat-request HARQ detection；
Step 207: configuring the configured transmissions such as respective transimission power, modulation coding method on a physical layer；
Step 208: independent data transmission is finally carried out on heterogeneity carrier wave CC.
Fig. 3 is that lte-a system carrier wave polymerize lower independent resource distribution method schematic diagram, and carrier wave polymerization dispatching algorithm can divide
It is dispatched for Independent Carrier Wave scheduling with united carrier, the present invention is realized on the basis of Independent Carrier Wave scheduling, Independent Carrier Wave tune
Degree is one kind of two-level scheduler, and the first order first provides the member that it is selected to each user according to corresponding CC distribution method and carries
Wave carries out the distribution of resource block in the second level, and Resource Scheduler is then provided a user according to corresponding resource scheduling algorithm can
With the resource block used.It the described method comprises the following steps:
Step 301: system is configured with L (at the total number of sub-carrier in L expression system) a Resource Scheduler to base station, often
A Resource Scheduler manages one into the resource on sub-carrier；
Step 302: when data flow reaches base station, base station is first that user selection is suitable according at sub-carrier selection strategy
At sub-carrier；
Step 303: being placed on this in sub-carrier in the buffer queue of user k user data is temporary；
Step 304: Resource Scheduler is to distribute resource block at the user data on sub-carrier positioned at this and carry out data biography
It is defeated.
Fig. 4 is the general flow chart of the LTE-A carrier wave polymeric composition carrier allocation method the present invention is based on CQI, the method
The following steps are included:
Step 401: configuring the parameter of system, the information of system is initialized；
Step 402: system to offer at sub-carrier including safety input, Radio Link Detection, physical uplink by controlling
A series of functions including channel can be classified as principal component according to the function and its corresponding process that provide at sub-carrier and carry
Wave PCC, He Fucheng sub-carrier SCC.In the present invention according to the coupling loss CL of carrier wave alternatively principal component carrier wave PCC according to
According to calculation formula CL=PL+ANT+SHAD+PENTR, wherein PL is path loss；ANT is antenna gain；SHAD declines for shade
It falls；PENTR is penetration loss.Using calculated coupling loss it is minimum at sub-carrier as principal component carrier wave PCC, add it is auxiliary at
Sub-carrier SCC is the CC number according to the polymerization of user's maximum；
Step 403: user will report after calculating the value of channel quality indicator (CQI), and there are many modes reported, this
CQI is reported using UE selection subband in invention, specific step:
1) system bandwidth of user is divided into J portions of bandwidth (BP)；
2) optimal sub-band is selected in each portions of bandwidth BP to be reported；
3) CQI that user updates all subbands in BP takes；
4) value that the CQI value at sub-carrier CC obtained is the optimal sub-band CQI reported；
It is related to the calculating of CQI in step 403, steps are as follows for specific calculating:
(1) effective Signal to Interference plus Noise Ratio SINR value is obtained using EESM algorithm, the formula that when calculating uses is as follows:
SINRiFor the Signal to Interference plus Noise Ratio on each subcarrier.L is the ingredient carrier number of polymerization.β is scale factor, in difference
Corresponding value is different under modulation system and code rate, as shown in table 1 specific corresponding to relationship.
The modulation of table 1 and the coding strategy MCS- β table of comparisons
| Modulation system | Code rate | β |
| QPSK | 1/3 | 1.49 |
| 1/2 | 1.57 | |
| 2/3 | 1.69 | |
| 3/4 | 1.69 | |
| 4/5 | 1.65 | |
| 16QAM | 1/3 | 3.36 |
| 1/2 | 4.56 | |
| 2/3 | 6.42 | |
| 3/4 | 7.33 | |
| 4/5 | 7.68 |
(2) mapping from Signal to Interference plus Noise Ratio SINR to channel quality indicator (CQI) is using the method directly mapped, in AWGN
Under environment, in the case that the value of block error rate BLER is fixed as 0.1, by the simulation curve of system determine Signal to Interference plus Noise Ratio SINR and
The linear corresponding relation of channel quality indicator (CQI).Specific formula is as follows:
WhereinThe value of i-th of Signal to Interference plus Noise Ratio SINR is represented,What is indicated is the value of i-th of CQI.
Step 404: the CQI value that step 403 is found out is ranked up from big to small；
Step 405: when there is user data to access, access CQI first is maximum at sub-carrier CC；
Step 406: the user data at sub-carrier CC will be assigned in step 405 according to corresponding resource scheduling algorithm
Resource block is distributed for it and is carried out data transmission.
Step 407: judging whether the user also has data to transmit；
Step 408: if the user also has data to transmit, call it is next at sub-carrier CC, in the unallocated use
It selects CQI value is maximum to distribute resource at sub-carrier CC in the residual components carrier wave CC of the data at family, repeats step 404；
Step 409: if the user does not have data to transmit, calling next user；
Step 410: judging whether active user is user that the last one will distribute data resource；
Step 411: if it is not, then continuing to repeat step 403；
Step 412: if it is the last one user, then terminating entire scheduling of resource process.
Claims (1)
1. a kind of LTE-A carrier wave polymeric composition carrier allocation method based on CQI, including the following aspects
1) main plot carrier wave PCC and secondary cell carrier wave SCC will be divided at sub-carrier CC according to the coupling loss CL of carrier wave: as choosing
The foundation for selecting PCC, using coupling loss CL it is the smallest at sub-carrier CC as main plot carrier wave PCC；It is poly- according to user's maximum later
That closes adds secondary cell carrier wave SCC at sub-carrier CC number；
2) current each channel quality indicator (CQI) value at sub-carrier CC, method are calculated are as follows:
1. calculating effective Signal to Interference plus Noise Ratio SINReff:
Wherein i be user use at the subcarrier on sub-carrier number,
SINRiFor the Signal to Interference plus Noise Ratio on subcarrier i, β is scale factor, and L is the ingredient carrier number of polymerization；
2. by effective Signal to Interference plus Noise Ratio SINReffIt is mapped directly into channel quality indicator (CQI), corresponding formula are as follows:
Wherein,Represent i-th of effective Signal to Interference plus Noise Ratio SINReffValue,What is indicated is i-th of channel quality indicator (CQI)
Value；
3) sequence of calculated channel quality indicator (CQI) value from high to low is arranged, when there is user to carry out data biography
It is accessed at sub-carrier by CQI value is high, i.e., is preferentially carried out data transmission with channel condition is good at sub-carrier first when defeated.
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| CN101242664A (en) * | 2007-12-27 | 2008-08-13 | 华为技术有限公司 | A realization method and device for multi-carrier wave power share |
| CN101615984A (en) * | 2009-08-07 | 2009-12-30 | 中兴通讯股份有限公司 | The method and apparatus of periodicity CQI feedback under the carrier aggregation |
| CN103874208A (en) * | 2012-12-14 | 2014-06-18 | 电信科学技术研究院 | Shared channel resource distribution method and equipment based on multi-carrier system |
| CN105392193A (en) * | 2010-08-10 | 2016-03-09 | 三星电子株式会社 | Method and apparatus for configuring power headroom information in mobile communication system |
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| US8687555B2 (en) * | 2010-09-29 | 2014-04-01 | Lg Electronics Inc. | Method and apparatus for performing effective feedback in wireless communication system supporting multiple antennas |
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| CN101242664A (en) * | 2007-12-27 | 2008-08-13 | 华为技术有限公司 | A realization method and device for multi-carrier wave power share |
| CN101615984A (en) * | 2009-08-07 | 2009-12-30 | 中兴通讯股份有限公司 | The method and apparatus of periodicity CQI feedback under the carrier aggregation |
| CN101615984B (en) * | 2009-08-07 | 2013-03-27 | 中兴通讯股份有限公司 | Method and device of periodic CQI feedback under carrier polymerization |
| CN105392193A (en) * | 2010-08-10 | 2016-03-09 | 三星电子株式会社 | Method and apparatus for configuring power headroom information in mobile communication system |
| CN103874208A (en) * | 2012-12-14 | 2014-06-18 | 电信科学技术研究院 | Shared channel resource distribution method and equipment based on multi-carrier system |
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