CN106358158B - Multicast broadcast multimedia service network collocating method based on lte-a system - Google Patents
Multicast broadcast multimedia service network collocating method based on lte-a system Download PDFInfo
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- CN106358158B CN106358158B CN201610990814.3A CN201610990814A CN106358158B CN 106358158 B CN106358158 B CN 106358158B CN 201610990814 A CN201610990814 A CN 201610990814A CN 106358158 B CN106358158 B CN 106358158B
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
Abstract
The invention discloses a kind of multicast broadcast multimedia service network collocating method based on lte-a system, the multicast broadcast multimedia service in lte-a system proposed based on 3GPP, comprehensively considering in whole network has multiple hot informations and existing range is not identical, the configuration of MBSFN influences whether the Signal to Interference plus Noise Ratio of user, and remaining Internet resources can be used to provide the factors such as unicast services after configuring broadcast/multicast service, propose it is a kind of can be based on use above scene, under the protocol frame of LTE-A, both user's program request demand had been met, optimize the multicast broadcast multimedia service network collocating method of network throughput again.
Description
Technical field
The present invention relates to a kind of multicast broadcast multimedia service network collocating method based on lte-a system, belongs to LTE-A
Cellular mobile network transmission technique field.
Background technique
3GPP (third generation partner program) LTE-A (the later period evolution of long-term evolving network) mobile communications network is state
Border telecommunication union radio communication department (ITU-R) confirms the 4G technology that can satisfy IMT-Advanced demand.The technology is intended to
Faster message transmission rate and more stable and reliable network performance are provided for mobile subscriber.Multicast broadcast multimedia service
(MBMS) important component being included in 3GPP LTE/LTE-A agreement, the service is mainly for the heat in cellular network
Point information is taken and is passed from multiple adjacent data sources (base station) using the synchronous multiple users into network of identical frequency spectrum resource
The method of this defeated hot information makes user obtain higher Signal to Interference plus Noise Ratio and faster transmission rate, while realizing network
Sharing for resource, improves the utilization rate of Internet resources.The service is broadcast live, mutually in video conference, television broadcasting, advertisement, venue
In the scenes such as dynamic game, the feature that the data volume of transmission information is big needed for being utilized, the duration is long, delay requirement is small both may be used
To meet the diverse requirements of user, and new business growth point is brought for operator.
MBMS is updated in LTE-A agreement by further evolution, increases the function of counting to heatrate and service company
The extension of continuous property, referred to as eMBMS.(region of MBSFNarea1, MBSFNarea2 are used uses the oblique of different directions to attached drawing 1 respectively
Line is indicated) network architecture of eMBMS is illustrated, it include MBMS gateway (MBMS-GW), multiple cell/multicast coordination function
The NodeB (eNB) of entity (MCE), mobile management entity (MME) and evolution.Wherein, MCE is for accessing control and resource
The controlled entity of distribution, for single MBMS business, MCE is mainly used for the scheduling of business, that is, select suitable resource (including frequency
The parameters such as rate, time), carry out multimedia broadcast multicast single frequency network (MBSFN) transmission；For multiple MBMS business, MCE needs to assist
Adjust its corresponding multiple MBSFN transmission, the size including the region MBSFN, radio resource uses etc., so as to rationally
Ground efficiently uses resource.MBMS-GW, which is mainly responsible for, is transmitted to eNB for the content information of broadcast.Judge whether to need to establish
MBSFN broadcast message, depending on temperature of this information in network, if by heatrate counting judge information need by
Broadcast, then MCE can establish the region MBSFN comprising several cellular cells.In a region MBSFN, multiple eNB benefits
Identical content is broadcasted with identical Internet resources, and the content that the different regions MBSFN is broadcasted is different, still
Allow to overlap each other between the region MBSFN, therefore how reasonable distribution Internet resources are concerning whole network between the region MBSFN
Performance.If measuring the effect of eMBMS network configuration with network throughput, the user in MBSFN is not will receive the region
The interference signal of interior eNB transmitting, but the interference signal of the transmitting of the eNB except the MBSFN can be received, therefore MBSFN networking
Selection also influence the Signal to Interference plus Noise Ratio of user simultaneously.
Summary of the invention
To solve the deficiencies in the prior art, the purpose of the present invention is to provide a kind of multi-media broadcasts based on lte-a system
Multicast service network collocating method is broadcast, under the protocol frame of 3GPP, proposes a kind of configuration method for optimizing network throughput, solution
Certainly the problem of this aspect allocation plan blank.
In order to achieve the above objectives, the present invention adopts the following technical scheme that:
A kind of multicast broadcast multimedia service network collocating method based on lte-a system, characterized in that including walking as follows
It is rapid:
1) it acquires and establishes data required for model, including cell, under multimedia content and each intra-cell users institute
The temperature of the multimedia content of load counts, and forms data acquisition system:
The region of overall network model covering is denoted as C, and the set in all regions MBSFN is denoted as A, all multimedia content
Set be denoted as S；
For one of cell c, the region a MBSFN a, a multimedia content s, the neighboring community of cell c with
Itself constitute set Nc；Temperature of the content s in cell c is denoted asThe net that transferring content s at least needs in cell c
Network resource is denoted asThe gain of wireless channel in cell c is determined by the minimum path channels of gain in cell, is denoted as hc, and
pcIndicate the transmission power of the eNB in the cell；
2) setting control variable:
A) binary variable ba,cIndicate whether cell c is dispensed in a of the region MBSFN, if then value is 1, if being otherwise worth
It is 0；
B) binary variable ds,aWhether expression content s can be broadcasted in a of the region MBSFN or multicast, if then value is
1, if otherwise value is 0；
C) integer variable Ns,aIndicate content s be broadcasted in a of the region MBSFN or multicast needed for distribution RB number, and
Have
3) objective function is set, and is optimized:
301) in cell c, the number for the user that eMBMS is covered isWhat residue was got off
RB (Radio Block) resource is assigned to unicast service, and the number of users that unicast service is covered is ηcAnd meetWherein R indicates available RB sum in a frame；
302) only it will receive the interference that next door is not belonging to the cell in the same region MBSFN in the cell of MBSFN network edge,
Interference signal is expressed as ∑i∈Neigh(c)∑s∈S∑a∈Aba,cNs,a(1-ba,i), wherein Neigh (c) indicates that cell c's is adjacent small
Area, i are any cell in neighbor set, ba,iThe same b of definitiona,c；
303) objective function to be optimized is set up, is expressed as maximizing the value of following equation:
Wherein, α is an adjustable parameter；
By the value of debugging control variable so that objective function is maximized, formed one not only met user demand but also
The network configuration scheme of network throughput can be optimized.
Advantageous effects of the invention: this method is utilized in the multimedia of downloading needed for each intra-cell users
It is that the temperature of appearance counts as a result, judge whether to need to establish MBSFN network, comprehensively consider the range of multiple MBSFN networks, network
The distribution of resource and the unicast transmission of idling-resource, optimize the entire throughput of network, promote the overall performance of network.
Detailed description of the invention
Fig. 1 is eMBMS system architecture diagram in the present invention；
Fig. 2 is the user interest distribution map that the present invention assumes in a specific embodiment；
Fig. 3 is the network configuration figure that the present invention is obtained by changing parameter alpha in a specific embodiment, wherein Fig. 3 (a),
The value of 3 (b), 3 (c) corresponding α is respectively 0,2 and 10；
Fig. 4 is the histogram for the network throughput that the present invention is obtained by change parameter alpha in a specific embodiment.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
In Simulation Test Environment, the eMBMS service in synchronizing network that test one is made of 21 cellular cells
Energy.Wireless network transmissions bandwidth is set as 10MHz, and the center bin of transmission is 2.5GHz, and the area of this synchronizing network is
12.34km2, it is assumed that the transmission power of eNB is 43dBm, and the spectral density of noise is -174dBm/Hz, has 50 in each cell
Register user.Assuming that a intra-cell users are (more in the present embodiment shown in Fig. 2 to the interested ratio of each multimedia content
Media content includes four, is denoted as s1~s4 respectively).
Setting control variable:
1) binary variable ba,cIndicate whether cell c is dispensed in a of the region MBSFN, if value is 1, value is 0 if not；
2) binary variable ds,aWhether expression content s can be broadcasted in a of the region MBSFN or multicast, if value is 1,
Value is 0 if not；
3) integer variable Ns,aIndicate content s be broadcasted in a of the region MBSFN or multicast needed for distribution RB number,
Therefore this relationship is set up:
In cell c, the number for the user that eMBMS is covered isThe RB that residue is got off
Resource can be assigned to unicast service, therefore the number of users that unicast service is covered is ηcAnd meet
Only it will receive the interference that next door is not belonging to the cell in the same region MBSFN in the cell of MBSFN network edge, therefore
Interference signal can be expressed as ∑i∈Neigh(c)∑s∈s∑a∈Aba,cNs,a(1-ba,i)。
The objective function of optimization can be expressed as maximizing the value of following equation: Wherein, α is an adjustable parameter.
The value that α is set separately is 0,2 and 10, the network configuration such as Fig. 3 (a) obtained by solution objective function, 3 (b), 3
(c) shown in.In figure, homochromy region is a region MBSFN.The value of α is further adjusted, the comparison of overall network throughput is such as
Shown in Fig. 4.
In Fig. 4, with the increase of the value of α, system increasingly tends to reduce the interference in network, so that MBSFN
The area in region increases, and is consequently increased in this way in the region MBSFN to the uninterested number of users of region institute broadcast message.
Therefore, it can be seen that, in α=2, being optimal of overall network configures, at this moment the handling capacity of network by adjusting the value of α
Obtain maximum value.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (1)
1. a kind of multicast broadcast multimedia service network collocating method based on lte-a system, characterized in that including walking as follows
It is rapid:
1) data required for model, including cell are established in acquisition, what multimedia content and each intra-cell users were downloaded
The temperature of multimedia content counts, and forms data acquisition system:
The region of overall network model covering is denoted as C, and the set in all regions MBSFN is denoted as A, the collection of all multimedia content
Conjunction is denoted as S；
For one of cell c, the region a MBSFN a, a multimedia content s, the neighboring community of cell c and its
Body constitutes set Nc；Temperature of the content s in cell c is denoted asThe network money that transferring content s at least needs in cell c
Source is denoted asThe gain of wireless channel in cell c is determined by the minimum path channels of gain in cell, is denoted as hc, and pcTable
Show the transmission power of the eNB in the cell；
2) setting control variable:
A) binary variable ba,cIndicate whether cell c is dispensed in a of the region MBSFN, if then value is 1, if otherwise value is 0；
B) binary variable ds,aWhether expression content s can be broadcasted in a of the region MBSFN or multicast, if then value is 1, if
Otherwise value is 0；
C) integer variable Ns,aIndicate content s be broadcasted in a of the region MBSFN or multicast needed for distribution RB number, and have
3) objective function is set, and is optimized:
301) in cell c, the number for the user that eMBMS is covered isThe RB money that residue is got off
Source is assigned to unicast service, if the Internet resources that unicast transmission content at least needs are denoted as ρuAnd unicast service is covered
Number of users is ηc, then meet following relationshipIt wherein can in one frame of R expression
The RB sum utilized；
302) it only will receive the interference that next door is not belonging to the cell in the same region MBSFN in the cell of MBSFN network edge, interfere
Signal is expressed as ∑i∈Neigh(c)∑s∈S∑a∈Aba,cNs,a(1-ba,i), wherein Neigh (c) indicates neighboring community's collection of cell c
It closes, i is any cell in neighbor set；
303) objective function to be optimized is set up, is expressed as maximizing the value of following equation:
Wherein, α is an adjustable parameter, empirically value selection；
By the value of debugging control variable, so that objective function is maximized, forms one and not only met user demand but also optimized
The network configuration scheme of network throughput.
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| CN101820687A (en) * | 2010-05-05 | 2010-09-01 | 中国科学院计算技术研究所 | Self-adaptive allocation system and method for broadcasting multicast radio resources |
| CN102270207A (en) * | 2010-06-02 | 2011-12-07 | 中国科学院计算技术研究所 | Online multimedia information mining oriented data caching method and system |
| CN102761831A (en) * | 2011-04-27 | 2012-10-31 | 中兴通讯股份有限公司 | Multimedia broadcast multicast service counting method and system |
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| US9030988B2 (en) * | 2012-06-29 | 2015-05-12 | Alcatel Lucent | Method and apparatus for switching between multicast/broadcast and unicast service |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101820687A (en) * | 2010-05-05 | 2010-09-01 | 中国科学院计算技术研究所 | Self-adaptive allocation system and method for broadcasting multicast radio resources |
| CN102270207A (en) * | 2010-06-02 | 2011-12-07 | 中国科学院计算技术研究所 | Online multimedia information mining oriented data caching method and system |
| CN102761831A (en) * | 2011-04-27 | 2012-10-31 | 中兴通讯股份有限公司 | Multimedia broadcast multicast service counting method and system |
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