CN106559758B - The real-time network dispatching method of multimedia broadcasting based on LTE system - Google Patents
The real-time network dispatching method of multimedia broadcasting based on LTE system Download PDFInfo
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- CN106559758B CN106559758B CN201611039851.2A CN201611039851A CN106559758B CN 106559758 B CN106559758 B CN 106559758B CN 201611039851 A CN201611039851 A CN 201611039851A CN 106559758 B CN106559758 B CN 106559758B
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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
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Abstract
The invention discloses a kind of real-time network dispatching methods of multimedia broadcasting based on LTE system, the multicast broadcast multimedia service in LTE system proposed based on 3GPP, consider that there are the different scenes of the hot information of multiple hot informations and each cell for each cell in the entire network, it proposes a kind of under the protocol frame of LTE, with lower operand, according to heatrate caused by active user program request demand, the method for rapid configuration multicast broadcast multimedia service network.With this method, LTE system multicast broadcast multimedia service rapid Optimum network performance while meeting user's program request demand can be made.
Description
Technical field
The present invention relates to a kind of Configuration network methods required when multicast broadcast multimedia service, and it is mobile to belong to LTE honeycomb
Network transmission technology field.
Background technique
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 technology that can satisfy IMT-Advanced demand.The technology is it is intended that mobile subscriber provides more
Quick message transmission rate and more stable and reliable network performance.Multicast broadcast multimedia service (MBMS) is included in 3GPP
Important component in LTE protocol, the service are taken mainly for the hot information in cellular network from multiple adjacent numbers
According to the method that source (base station) transmits this hot information using the synchronous multiple users into network of identical frequency spectrum resource, make user
Faster transmission rate is obtained, while realizing the shared of Internet resources, improves the utilization rate of Internet resources.The service exists
In the scenes such as video conference, television broadcasting, advertisement, venue live streaming, interactive game, the data volume of transmission information needed for being utilized
Greatly, the feature that the duration is long, delay requirement is small, not only can satisfy the diverse requirements of user, but also bring for operator new
Business growth point.
MBMS is updated in LTE protocol by further evolution, increases the function of counting to heatrate and service is continuous
The extension of property, referred to as eMBMS.(region of MBSFNarea1, MBSFNarea2 are used to be added with the oblique line of different directions Fig. 1 respectively
To indicate) network architecture of eMBMS is illustrated, it include MBMS gateway (MBMS-GW), multiple cell/multicast coordination function entity
(MCE), mobile management entity (MME) and the NodeB (eNB) of evolution.Wherein, MCE is for accessing control and resource allocation
Controlled entity, for single MBMS business, MCE is mainly used for the scheduling of business, that is, select suitable resource (including frequency,
The parameters such as time), carry out multimedia broadcast multicast single frequency network (MBSFN) transmission；For multiple MBMS business, MCE needs to coordinate
Its corresponding multiple MBSFN transmission, the size including the region MBSFN, radio resource use etc., so as to reasonably,
Efficiently use 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 judging that information needs are broadcasted to heatrate counting,
Then MCE can establish the region MBSFN comprising several cellular cells.In a region MBSFN, multiple eNB utilize phase
Same Internet resources broadcast identical content, and the content that the different regions MBSFN is broadcasted is different, but the area MBSFN
Allow to overlap each other between domain, thus between the region MBSFN how reasonable distribution Internet resources concerning whole network performance.Such as
Fruit measures the effect of eMBMS network configuration with network throughput, and the user in MBSFN is not will receive eNB in the region to send out
The interference signal penetrated, but the interference signal of the transmitting of the eNB except the MBSFN can be received, therefore the selection of MBSFN networking
The Signal to Interference plus Noise Ratio of user is influenced simultaneously.
In view of in cellular mobile network, the position of user can change, and there is a possibility that across cell, and user is internal
The interest-degree of appearance can also change, and temperature of each multimedia content in cell is caused 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 multimedia content in conjunction with user.
Summary of the invention
To solve the deficiencies in the prior art, the purpose of the present invention is to provide a kind of multimedia broadcastings based on LTE system
Realtime networking method for building up, this dispatching method calculation amount is small, using for the more of downloading needed for each intra-cell users
The real-time results that the temperature of media content counts, rapid coordination cell establishes MBSFN network, and institute is configured in MBSFN network
Need broadcasted content.
In order to achieve the above objectives, the present invention adopts the following technical scheme that:
A kind of real-time network dispatching method of the multimedia broadcasting based on LTE system, characterized in that include the following steps:
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, limits in LTE protocol
Maximum element number is 256 in set A, and the set of all multimedia content is denoted as S；
For one of cell c, the region a MBSFN a, a multimedia content m, the neighboring community of cell c with
Itself constitute set Nc；Temperature of the content m in cell c is denoted as(it can be regarded as how much content m is used in cell c
Family program request)；The Internet resources that transferring content m at least needs in cell c are denoted as(unit is radio resource block, RB)；It is small
The set in the affiliated region MBSFN area c is denoted as Ac, the set for the multimedia content broadcasted in cell c is denoted as Mc；
2) setting control variable and the required condition met of control variable:
A) binary variableIndicate whether cell c is dispensed in a of the region MBSFN, if thenIt is 1, if otherwise
It is 0；
B) discrete variable μaIndicate the multimedia content being broadcasted in a of the region MBSFN；
C) integer variable xaIt is represented to the RB number of the region MBSFN a distribution；
Based on above-mentioned model and LTE protocol, controls variable and the condition met is needed to have:
i)
ii)γ indicates that the LTE that can be used as most in a time frame is broadcasted in formula
RB number；
iii)The neighboring community of c ' expression cell c, summation are to be directed in formula
For all regions MBSFN that the neighboring community of cell c and cell c itself are belonged to；
3) user's satisfaction is calculated according to the data that step 1-2) is formed, for portraying the internetworking based on this network model
Can, user's satisfaction is defined asWherein, R is indicated in a time frame
The interior RB sum that can be distributed, μ indicate the content for being used for unicast transmission,Indicate that LTE broadcasts the user being met by
Number, right half partIndicate that residue RB resource was used for that unicast multimedia content is met by puts down
Equal number of users, β indicate to receive user group's satisfaction of the satisfaction of the user group of unicast signal and reception broadcast singal
Coefficient ratio；
4) it is arranged based on the fixed region MBSFN, determines the multimedia content of the required broadcast in each region, it is specific to walk
It is rapid as follows:
Region C of the step 401) according to the obtained overall network model covering of step 1), the collection in all regions MBSFN
Close A and binary variable setThe element in A is divided by the number of users of IP Information On Demand in each region MBSFN
Class；
Step 402) is according to the order of elements classified in set A, and selection meets condition iii from properties collection M) member
Element composition set viable_content_set；
Step 403) determines set viable_content_set:
If viable_content_set is empty set, step 402) is returned to, selects the element in next set A；
If viable_content_set is not empty set, selection can maximize V from viable_content_setc's
Element μaAs the broadcasted content in the region MBSFN；
5) determine how to configure the region MBSFN, specific steps are as follows:
Step 501) selects each of these cell c, and c is enabled to constitute the region a MBSFN a, is counted according to step 4)
It calculates and maximizes VcValue V0 c；
Step 502) is to any region MBSFN a1Arbitrary neighborhood region a2Merge a if calculated1And a2It is same
Behind the region MBSFN, by the calculated V of step 4) institutecValue.
Step 503) selecting step 502) in the maximum V that can obtaincValue, if the value is greater than V0 cValue, then it is corresponding adjacent
Region and the region MBSFN a1Merge, and by V0 cValue update maximum value thus.
Step 504) traverses all nearby MBSFN Areas, to each adjacent area, step 502) is repeated, if can not obtain
Obtain bigger V0 cValue or the number in all regions MBSFN terminate this algorithm less than 256；
Step 505) is obtained according to the setting of the region the MBSFN configuration mode at the end of algorithm and broadcasted content in region
To a kind of real-time network scheduling scheme.
Further, this method meets the limitation in the eMBMS agreement of 3GPP.
Advantageous effects of the invention: this method is under the protocol frame of LTE, with lower operand, according to reality
When user's program request demand caused by heatrate, rapid configuration multicast broadcast multimedia service network, while LTE can be made
Multimedia system broadcast/multicast service rapid Optimum network performance while meeting user's program request demand.
Detailed description of the invention
Fig. 1 is eMBMS system architecture diagram in the present invention；
Fig. 2 is cellular network architecture figure in embodiment；
The MBSFN network configuration figure generated in embodiment by proposed real time algorithm when Fig. 3.
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.
Step 1) -3 of the invention) for establishing model and corresponding control variable and objective function being arranged.Step 4) -5)
It is the practical use for carrying out algorithm on the basis of the model, rapid coordination cell establishes MBSFN network, and determines in MBSFN
Broadcasted content needed for being configured in network.
In the present embodiment, in Simulation Test Environment, in the synchronizing network that test one is made of 57 cellular cells
EMBMS network configuration.Wireless network transmissions bandwidth is set as 10MHz, and the center bin of transmission is 2.5GHz, the face of this synchronizing network
Product is 12.34km2, a total of 3420 registration users.
Assuming that a intra-cell users are shown in table 1 to the interested ratio of each multimedia content, wherein m1, m2, m3 divide
Not Biao Shi three kinds of multimedia content by user's program request, uni indicates to need the contents of unicast services.
Table 1 be in embodiment in each cell to broadcast or the interested user's number list of unicast info
The foundation that model is carried out based on the above content, the real-time LTE broadcast generated after algorithm configuration of the invention
As shown in figure 3, the distribution in specific region corresponds to the letter in figure before each cell label, identical letter indicates network configuration
Cell is in some region MBSFN.
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 real-time network dispatching method of the multimedia broadcasting based on LTE system, characterized in that include the following steps:
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 m, the neighboring community of cell c and its
Body constitutes set Nc；Temperature of the content m in cell c is denoted asThe network money that transferring content m at least needs in cell c
Source is denoted asThe set in the affiliated region MBSFN cell c is denoted as Ac, the set for the multimedia content broadcasted in cell c is denoted as Mc；
2) setting control variable and the required condition met of control variable:
A) binary variableIndicate whether cell c is dispensed in a of the region MBSFN, if thenIt is 1, if otherwiseIt is 0；
B) discrete variable μaIndicate the multimedia content being broadcasted in a of the region MBSFN；
C) integer variable xaIt is represented to RB (Radio block) number of the region MBSFN a distribution；
Above-mentioned control variable needs the condition met to have:
i)
ii)γ indicates the RB that can be used as LTE broadcast most in a time frame in formula
Number；
iii)The neighboring community of c ' expression cell c in formula, summation are for cell c
Neighboring community and all regions MBSFN that are belonged to cell c itself for；
3) user's satisfaction is calculated according to the network topology structure that step 1-2) is formed, for portraying the net based on this network model
Network performance, user's satisfaction are defined asWherein, R is indicated at one
The RB sum that can be distributed in time frame, μ indicate the content for being used for unicast transmission,Indicate that LTE broadcast is met by
Number of users,Right half part indicates that leftover radio resources block is used for unicast multimedia content
The average user number being met by, β are indicated to receive the satisfaction of the user group of unicast signal and are received the user of broadcast singal
The coefficient ratio of group's satisfaction；
4) it is arranged based on the fixed region MBSFN, determines the multimedia content of the required broadcast in each region, specific steps are such as
Under:
Region C, the set A in all regions MBSFN that step 401) is covered according to the obtained overall network model of step 1),
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 region MBSFN
Sequence；
Step 402) successively selects the region MBSFN according to the order of elements classified in set A, then from properties collection M
Selection meet condition iii) element composition set viable_content_set；
Step 403) determines set viable_content_set:
If viable_content_set is empty set, step 402) is returned to, selects the element in next set A；
If viable_content_set is not empty set, selection can maximize V from viable_content_setcElement
μaAs the broadcasted content in the region MBSFN；
5) determine how to configure the region MBSFN, specific steps are as follows:
Step 501) selects each of these cell c, enables c constitute the region a MBSFN a, is calculated according to step 4)
Maximize VcValue V0 c；
Step 502) is to any region MBSFN a1Arbitrary neighborhood region a2Merge a if calculated1And a2For the same area MBSFN
Behind domain, by the calculated V of step 4) institutecValue；
Step 503) selecting step 502) in the maximum V that can obtaincValue, if the value is greater than V0 cValue, then corresponding adjacent area
With the region MBSFN a1Merge, and by V0 cValue update maximum value thus；
Step 504) traverses all nearby MBSFN Areas, to each adjacent area, step 502) is repeated, if can not obtain more
Big V0 cValue or the number in all regions MBSFN terminate this algorithm less than 256；
Step 505) obtains reality according to the setting of the region the MBSFN configuration mode at the end of algorithm and broadcasted content in region
When network scheduling scheme.
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| CN102118690B (en) * | 2009-12-31 | 2014-01-22 | 华为技术有限公司 | Method and device for carrying out measurement on MBSFN (Multicast/Broadcast Single-frequency Network) cells |
| US20110182272A1 (en) * | 2010-01-25 | 2011-07-28 | Qualcomm Incorporated | Application-layer handoff of an access terminal from a first system of an access network to a second system of the access network during a communication session within a wireless communications system |
| US9160592B2 (en) * | 2011-02-23 | 2015-10-13 | Qualcomm Incorporated | System and method for single carrier optimization for evolved multimedia broadcast multicast service |
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