CN106559758A - Real-time network dispatching method based on the multimedia broadcasting of LTE system - Google Patents
Real-time network dispatching method based on the multimedia broadcasting of LTE system Download PDFInfo
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- CN106559758A CN106559758A CN201611039851.2A CN201611039851A CN106559758A CN 106559758 A CN106559758 A CN 106559758A CN 201611039851 A CN201611039851 A CN 201611039851A CN 106559758 A CN106559758 A CN 106559758A
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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
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Abstract
The invention discloses a kind of real-time network dispatching method of the multimedia broadcasting based on LTE system, based on the multicast broadcast multimedia service in the LTE system that 3GPP is proposed, consider that each cell has the scene that the hot information of multiple hot informations and each cell is differed in the entire network, propose a kind of under the protocol frame of LTE, with relatively low operand, heatrate according to produced by active user program request demand, the method for rapid configuration multicast broadcast multimedia service network.With the method, LTE system multicast broadcast multimedia service rapid Optimum network performance while user's program request demand is met can be caused.
Description
Technical field
The present invention relates to a kind of Configuration network method required during multicast broadcast multimedia service, belongs to the movement of LTE honeycombs
Network transmission technology field.
Background technology
3GPP (third generation partner program) LTE (Long Term Evolution) mobile communications network is International Telecommunication Union's channel radio
Letter department (ITU-R) confirms the 4G technologies that can meet IMT-Advanced demands.The technology is it is intended that mobile subscriber provides more
Quick message transmission rate and more stable reliable network performance.Multicast broadcast multimedia service (MBMS) is included in 3GPP
Important component part in LTE protocol, the service are taken from multiple adjacent numbers mainly for the hot information in cellular network
According to the method that source (base station) synchronously transmits this hot information to the multiple users in network using identical frequency spectrum resource, user is made
Faster transfer rate is obtained, while realizing the shared of Internet resources, the utilization rate of Internet resources is improve.The service exists
In the scenes such as video conference, television broadcasting, advertisement, the live, interactive game of venue, the data volume of required transmission information is make use of
Greatly, the characteristics of duration is long, delay requirement is little, can both meet the diverse requirements of user, and bring for operator new
Business growth point.
MBMS is updated by further evolution in LTE protocol, increased the function of counting to heatrate continuous with service
The extension of property, referred to as eMBMS.Fig. 1 (is used and is added with the oblique line of different directions respectively in the region of MBSFNarea1, MBSFNarea2
To represent) network architecture of eMBMS is illustrated, include MBMS gateways (MBMS-GW), multiple cell/multicast coordination function entity
(MCE), mobile management entity (MME), and evolution NodeB (eNB).Wherein, MCE is for Access Control and resource allocation
Controlled entity, for single MBMS, MCE is mainly used in the scheduling of business, that is, select suitable resource (include frequency,
The parameters such as time), carry out multimedia broadcast multicast SFN (MBSFN) transmission；For multiple MBMSs, MCE needs to coordinate
Its corresponding multiple MBSFN transmission, including the size in MBSFN regions, Radio Resource is used etc., so as to reasonably,
Resource is used efficiently.MBMS-GW is mainly responsible for the content information of broadcast being transmitted to eNB.Judge whether to need to set up MBSFN
Broadcast message, depending on temperature of this information in network, if needing to be broadcasted by counting heatrate judgement information,
Then MCE can set up a MBSFN region comprising several cellular cells.In a MBSFN region, multiple eNB utilize phase
With Internet resources broadcast identical content, and the content broadcasted by different MBSFN regions be it is different, but MBSFN areas
Allow to overlap each other between domain, therefore how performance of the reasonable distribution Internet resources concerning whole network between MBSFN regions.Such as
Fruit weighs the effect of eMBMS network configurations with network throughput, and the user in MBSFN is will not to receive eNB in the region to send out
The interference signal penetrated, but the interference signal of the eNB transmittings outside receiving the MBSFN, therefore the selection of MBSFN networkings
The Signal to Interference plus Noise Ratio of user is affected simultaneously.
In view of in cellular mobile network, the position of user can change, and there is a possibility that, across cell, user is internal
The interest-degree of appearance can also change, and cause temperature of each content of multimedia in cell to change also with the time, need
There is a kind of method that fast network scheduling can be made to the real-time interest-degree of content of multimedia with reference to user.
The content of the invention
To solve the deficiencies in the prior art, it is an object of the invention to provide a kind of multimedia broadcasting based on LTE system
Realtime networking method for building up, this dispatching method amount of calculation is little, using many for what is downloaded needed for each intra-cell users
The real-time results that the temperature of media content is counted, rapid coordination cell sets up MBSFN networks, and institute is configured in MBSFN networks
Need broadcasted content.
In order to realize above-mentioned target, the present invention is adopted the following technical scheme that：
A kind of real-time network dispatching method of the multimedia broadcasting based on LTE system, is characterized in that, comprise the steps：
1) data set up required for model, including cell are gathered, under content of multimedia and each intra-cell users institute
The temperature of the content of multimedia of load is counted, and forms data acquisition system：
The region that overall network model is covered is designated as C, and the set in all MBSFN regions is designated as A, limits in LTE protocol
In set A, maximum element number is 256, and the set of all content of multimedia is designated as S；
For one of cell c, a MBSFN regions a, a content of multimedia m, the neighbor cell of cell c with
Set N is constituted itselfc；Temperature of content m in cell c is designated as(can be regarded as how many contents m is used in cell c
Family program request)；The Internet resources that transferring content m at least needs in cell c are designated as(unit be radio resource block, RB)；It is little
The set in the affiliated MBSFN regions of area c is designated as Ac, the set of the content of multimedia broadcasted in cell c is designated as Mc；
2) condition met required for control variables and control variables is set：
A) binary variableRepresent whether cell c is dispensed in a of MBSFN regions, if thenFor 1, if otherwise
For 0；
B) discrete variable μaThe content of multimedia that expression is broadcasted in a of MBSFN regions；
C) integer variable xaIt is represented to the RB numbers of MBSFN regions a distribution；
Based on above-mentioned model and LTE protocol, control variables needs the condition for meeting to have：
i)
ii)During in formula, γ represents a time frame, most LTE that can be used as is broadcasted
RB numbers；
iii)In formula, c ' represents the neighbor cell of cell c, and summation is to be directed to
For all MBSFN regions that the neighbor cell of cell c and cell c itself are belonged to；
3) according to step 1-2) data that formed calculate user's satisfaction, for portraying the internetworking based on this network model
Can, user's satisfaction is defined asWherein, R is represented in a time frame
The interior RB that can distribute is total, and μ represents the content for unicast transmission,Represent the user that LTE broadcast is met by
Number, right half partRepresent that what residue RB resources were used for that unicast multimedia content is met by puts down
Equal number of users, β represent the satisfaction and the user group's satisfaction for receiving broadcast singal of the user group for receiving unicast signal
Coefficient ratio；
4) arranged based on fixed MBSFN regions, determined in the content of multimedia broadcasted needed for regional, it is concrete to walk
It is rapid as follows：
Step 401) according to step 1) obtained by overall network model cover region C, the collection in all MBSFN regions
Close A, and binary variable setElement in A is carried out point by the number of users of IP Information On Demand in each MBSFN regions
Class；
Step 402) according to the order of elements classified in set A, select to meet condition iii from properties collection M) unit
Element composition set viable_content_set；
Step 403) set viable_content_set is judged：
If viable_content_set is empty set, step 402 is returned to), select the element in next set A；
If viable_content_set is not empty set, select to maximize V from viable_content_setc's
Element μaAs the broadcasted content in MBSFN regions；
5) determine how to configure MBSFN regions, concretely comprise the following steps：
Step 501) each cell c is selected, make c constitute a MBSFN regions a, according to step 4) meter
Calculate maximization VcValue V0 c；
Step 502) to any MBSFN regions a1Arbitrary neighborhood region a2If calculating and merging a1And a2For same
Behind MBSFN regions, through step 4) V that calculatedcValue.
Step 503) selecting step 502) in the maximum V that can obtaincValue, if the value is more than V0 cValue, then it is corresponding adjacent
Region and MBSFN regions a1Merge, and by V0 cValue be updated to this maximum.
Step 504) all nearby MBSFN Areas of traversal, to each adjacent area, repeat step 502), if cannot obtain
Obtain bigger V0 cIt is worth, or the number in all MBSFN regions is less than 256, terminates this algorithm；
Step 505) according to the setting of broadcasted content in the MBSFN regions configuration mode at the end of algorithm and region, obtain
To a kind of real-time network scheduling scheme.
Further, this method meets the restriction in the eMBMS agreements of 3GPP.
The beneficial effect reached by the present invention：This method under the protocol frame of LTE, with relatively low operand, according to reality
When user's program request demand produced by heatrate, rapid configuration multicast broadcast multimedia service network, while LTE can be caused
Multimedia system broadcast/multicast service rapid Optimum network performance while user's program request demand is met.
Description of the drawings
Fig. 1 is eMBMS system architecture diagrams in the present invention；
Fig. 2 is cellular network architecture figure in embodiment；
Pass through the MBSFN network configuration figures that proposed real time algorithm is generated during Fig. 3 in embodiment.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
The step 1 of the present invention) -3) for setting up model and arrange corresponding control variables and object function.Step 4) -5)
It is the use for actually entering line algorithm on the basis of the model, rapid coordination cell sets up MBSFN networks, and determines in MBSFN
Broadcasted content needed for configuring in network.
In the present embodiment, in Simulation Test Environment, test in a synchronizing network being made up of 57 cellular cells
EMBMS network configurations.Wireless network transmissions bandwidth is set to 10MHz, and the center bin of transmission is 2.5GHz, the face of this synchronizing network
Product is 12.34km2, a total of 3420 register users.
Assume that an intra-cell users ratio interested in each content of multimedia is wherein m1, m2, m3 point shown in table 1
Not Biao Shi three kinds of content of multimedia by user's program request, uni represents the content for needing unicast services.
Table 1 is user's number list interested in broadcast or unicast info in each cell in embodiment
The foundation of model is carried out based on above content, the real-time LTE broadcast generated after the algorithm configuration of the present invention
Network configuration is as shown in figure 3, the distribution in concrete region is corresponding to the letter before each cell label in figure, identical letter representation
Cell is in certain MBSFN region.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, on the premise of without departing from the technology of the present invention principle, some improvement and deformation can also be made, these improve and deform
Also should be regarded as protection scope of the present invention.
Claims (1)
1. a kind of real-time network dispatching method of the multimedia broadcasting based on LTE system, is characterized in that, comprise the steps：
1) what the data that collection is set up required for model, including cell, content of multimedia and each intra-cell users were downloaded
The temperature of content of multimedia is counted, and forms data acquisition system：
The region that overall network model is covered is designated as C, and the set in all MBSFN regions is designated as A, the collection of all content of multimedia
Conjunction is designated as S；
For one of cell c, a MBSFN regions a, a content of multimedia m, the neighbor cell of cell c and its
Body constitutes set Nc；Temperature of content m in cell c is designated asThe network money that transferring content m at least needs in cell c
Source is designated asThe set in the affiliated MBSFN regions of cell c is designated as Ac, the set of the content of multimedia broadcasted in cell c is designated as Mc；
2) condition met required for control variables and control variables is set：
A) binary variableRepresent whether cell c is dispensed in a of MBSFN regions, if thenFor 1, if otherwiseFor 0；
B) discrete variable μaThe content of multimedia that expression is broadcasted in a of MBSFN regions；
C) integer variable xaIt is represented to RB (Radio block) number of MBSFN regions a distribution；
Above-mentioned control variables needs the condition for meeting to have：
i)
ii)In formula, γ represents most RB that can be used as LTE broadcast in a time frame
Number；
iii)In formula, c ' represents the neighbor cell of cell c, and summation is for cell c
Neighbor cell and all MBSFN regions for being belonged to of cell c itself for；
3) according to step 1-2) network topology structure that formed calculates user's satisfaction, for portraying the net based on this network model
Network performance, user's satisfaction are defined asWherein, R is represented at one
The RB that time frame in can be distributed is total, and μ represents the content for unicast transmission,Represent that LTE broadcast is met by
Number of users,Right half part represents that leftover radio resources block is used for unicast multimedia content
The average user number being met by, β represent the satisfaction of the user group for receiving unicast signal and the user for receiving broadcast singal
The coefficient ratio of colony's satisfaction；
4) arranged based on fixed MBSFN regions, determined in the content of multimedia broadcasted needed for regional, concrete steps are such as
Under：
Step 401) according to step 1) obtained by overall network model cover region C, the set A in all MBSFN regions,
And binary variable setClassification row is carried out to the element in A by the number of users of IP Information On Demand in each MBSFN regions
Sequence；
Step 402) according to the order of elements classified in set A, a MBSFN region is selected successively, then from properties collection M
Selection meets condition iii) element composition set viable_content_set；
Step 403) set viable_content_set is judged：
If viable_content_set is empty set, step 402 is returned to), select the element in next set A；
If viable_content_set is not empty set, select to maximize V from viable_content_setcElement
μaAs the broadcasted content in MBSFN regions；
5) determine how to configure MBSFN regions, concretely comprise the following steps：
Step 501) each cell c is selected, make c constitute a MBSFN regions a, according to step 4) calculate
Maximize VcValue V0 c；
Step 502) to any MBSFN regions a1Arbitrary neighborhood region a2If calculating and merging a1And a2For same MBSFN areas
Behind domain, through step 4) V that calculatedcValue.
Step 503) selecting step 502) in the maximum V that can obtaincValue, if the value is more than V0 cValue, then corresponding adjacent area
With MBSFN regions a1Merge, and by V0 cValue be updated to this maximum；
Step 504) all nearby MBSFN Areas of traversal, to each adjacent area, repeat step 502), if cannot obtain more
Big V0 cIt is worth, or the number in all MBSFN regions is less than 256, terminates this algorithm；
Step 505) according to the setting of broadcasted content in the MBSFN regions configuration mode at the end of algorithm and region, obtain reality
When network scheduling scheme.
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