CN106341210B - The resource allocation methods and system of multicast service - Google Patents
The resource allocation methods and system of multicast service Download PDFInfo
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- CN106341210B CN106341210B CN201510408477.8A CN201510408477A CN106341210B CN 106341210 B CN106341210 B CN 106341210B CN 201510408477 A CN201510408477 A CN 201510408477A CN 106341210 B CN106341210 B CN 106341210B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/30—Resource management for broadcast services
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Abstract
The present invention relates to a kind of resource allocation methods of multicast service and system, this method includes being configured to the Modulation and Coding Scheme grade of session, be grouped to session and being configured according to the Modulation and Coding Scheme grade of session to the session period after grouping.Wherein, the configuration process includes: S1, the midpoint user for determining each cell；S2, calculate respective cell midpoint user channel quality detection average value；S3, Modulation and Coding Scheme grade corresponding to minimum in the channel quality detection average value of each cell is determined；The Modulation and Coding Scheme grade of session on S4, setting Physical Multicast Channel.The present invention realizes the purpose that corresponding Modulation and Coding Scheme grade is chosen according to user's feature, and the packet mode avoids data and overstocks for a long time, completes session as soon as possible.In addition, the session period of conversation group is arranged according to the Modulation and Coding Scheme grade of the session after grouping, make multicast resource rational utilization.
Description
Technical field
The present invention relates to multimedia broadcast multicast technical fields, and in particular to a kind of resource allocation methods of multicast service and
A kind of resource allocation system of multicast service.
Background technique
In order to efficiently use mobile network resource, third generation partner program (3rd Generation
Partnership Project, abbreviation 3GPP) propose multimedia broadcast multi-broadcasting business (Multimedia Broadcast
Multicast Service, abbreviation MBMS).Multimedia broadcast multi-broadcasting business is that one kind is used from a data source to multiple targets
The technology of family equipment transmission data realizes the shared of network (including core net and access net) resource, improves Internet resources
The utilization rate of (especially air interface resource).It is ground in long term evolution (Long Term Evolution, abbreviation LTE) system
The MBMS technology studied carefully, referred to as multimedia broadcast multi-broadcasting business, that is, e-MBMS of evolution.
In e-MBMS, there are two kinds of transmission modes: single cell transmission, multiple cell transmission.Wherein, single cell transmission refers to
Current broadcasting/packet service is only in a certain specific cell transmission, and other cells do not provide the covering of this business, therefore single
Cell transmission lacks multiple cell and merges bring performance gain.Multiple cell transmission refers to that multiple broadcast/group broadcast cell transmissions are same
A specific business, to realize that the merging of receiving end receives.Multiple cell transmission enters single frequency network (Single in access net
Frequency Network, abbreviation SFN) transmission mode be Multicast Broadcast Single Frequency Network (Multicast Broadcast
Single Frequency Network, abbreviation MBSFN) transmission mode is exactly with identical frequency in the same time multiple
Cell synchronizes transmission.
When transmitting e-MBMS business with MBSFN transmission mode, the same time synchronizes the multiple of transmission with identical frequency
Cell is a region MBSFN, and cell is the minimum unit in the region MBSFN.It can be supported in one region MBSFN multiple and different
E-MBMS business, each region MBSFN can at most support the transmission channel of 16 carrying multicast services.Meanwhile a cell can
To belong to multiple regions MBSFN, general cell supports the overlapping covering in 1 to 8 region MBSFN, i.e., user can receive multiple
The business in the region MBSFN.
Currently, generally using multiple cell multicast coordination entity (Multi-cell multicast Coordination
Entity, abbreviation MCE) complete radio resource isochronous schedules.MCE receives business service quality information i.e. QoS information, and root
The distribution of multicast resource is carried out according to QoS information, to carry out resource distribution to evolved base station, that is, eNB.Wherein, the industry received
It include QoS type identification, that is, QCI (QoS Class Identifier), address resolution protocol in the configuration cell for QoS information of being engaged in
Information, that is, ARP (Address Resolution Protocol) information guarantees bit rate (Guranteed Bit Rate, letter
Claim GBR) parameter information.
However, at present MCE according to QoS information carry out resource set when, there are resource allocation it is unreasonable the problems such as.Example
Such as, when configuring to Modulation and Coding Scheme grade, the determination process of entire Modulation and Coding Scheme grade is more complicated, and
The characteristics of user cannot be directed to, configures.
Summary of the invention
In view of the foregoing drawbacks, the present invention provides a kind of resource allocation methods of multicast service and system, this method can be with
The determination process for solving Modulation and Coding Scheme grade in the prior art is more complicated, and cannot match for the characteristics of user
The problem of setting.
In a first aspect, the resource allocation methods of the multicast service include the modulating-coding side to session on Physical Multicast Channel
Case grade is configured, and the configuration process includes:
S1, the midpoint user for determining each cell in multicast broadcast single frequency network region, the midpoint user are affiliated small
User of the Signal to Interference plus Noise Ratio in the first preset range in area；
S2, the channel quality detection value obtained in each detection cycle according to the midpoint user of each cell are calculated
The channel quality detection average value of the midpoint user of respective cell in each detection cycle；
S3, it determines corresponding to minimum in each detection cycle in the channel quality detection average value of each cell
Modulation and Coding Scheme grade；
S4, according to the corresponding Modulation and Coding Scheme grade of the minimum, physical multicast is set in corresponding detection cycle and is believed
The Modulation and Coding Scheme grade of session on road.
Further, in the S2 further include: to being calculated in each detection cycle after first detection cycle
The channel quality detection average value be smoothed；The channel quality detection average value in the S3 is smooth place
Analog value after reason；Or
In the S3 further include: to the identified minimum in each detection cycle after first detection cycle
Corresponding Modulation and Coding Scheme grade is smoothed；The corresponding Modulation and Coding Scheme grade of the minimum in the S4
For the analog value after smoothing processing.
Further, the S4 includes:
Judge the business service quality classification logotype grade of each session and the business service quality class of the second preset range
Not Biao Shi grade relationship；
If the business service quality classification logotype grade of corresponding session is lower than the business service matter of second preset range
Measure the lowest class in classification logotype grade, then it is the corresponding Modulation and Coding Scheme grade up-regulation first of the minimum is default etc.
Grade, and using the Modulation and Coding Scheme grade after up-regulation as the Modulation and Coding Scheme grade of the corresponding session；
If the business service quality classification logotype grade of corresponding session is in the business service quality of second preset range
In classification logotype grade, then using the corresponding Modulation and Coding Scheme grade of the minimum as the modulating-coding of the corresponding session
Scheme grade；
If the business service quality classification logotype grade of corresponding session is higher than the business service matter of second preset range
Measure the highest level in classification logotype grade, then it is the corresponding Modulation and Coding Scheme grade downward second of the minimum is default etc.
Grade, and using the Modulation and Coding Scheme grade after downward as the Modulation and Coding Scheme grade of the corresponding session.
Further, this method further includes being grouped to the session on Physical Multicast Channel, is specifically included:
In a conversation measurement period, the number of the identical session of business service quality classification logotype grade is judged
It whether is more than preset quantity；
If the number is more than the preset quantity, by the identical all sessions of business service quality classification logotype grade
In the session of the shortest preset quantity of minimum latency since session request is initiated to data between transmission be divided into one group.
Further, described to be sent out in the identical all sessions of business service quality classification logotype grade from session request
It rises to the session that data start the shortest preset quantity of minimum latency between transmission and is divided into one group, comprising:
According to the length of the minimum latency since session request is initiated to data between transmission, by business service matter
The identical all sessions of amount classification logotype grade are ranked up；
According to ranking results, the shorter session of the minimum latency more preferentially enters grouping, until entering described point
The quantity of group reaches the preset quantity.
Further, this method further includes matching to subframe total quantity needed for each session on Physical Multicast Channel
It sets, specifically includes:
A1, guarantee bit rate, system band according to corresponding to each of conversation group session on Physical Multicast Channel
Wide and place conversation group Modulation and Coding Scheme grade, calculates the session period of corresponding session；
A2, the least common multiple for calculating the session period of all sessions in the conversation group, the least common multiple is made
For the group period of the conversation group；
A3, the session period for organizing each session in period and the conversation group according to the conversation group, calculate corresponding meeting
Subframe total quantity required for talking about, and corresponding session is configured according to the subframe total quantity.
Further, the session period of corresponding session is calculate by the following formula in the A1:
Wherein, 1≤i≤M, M are the number of session in each conversation group, TiFor the session period of i-th of session, NiFor list
The number of sub frames that i-th of session needs in the time of position, GBRsession-iFor the ensures bit rate of i-th of session, QiFor i-th of session
The data volume transmitted of a subframe, QiThe Modulation and Coding Scheme etc. of conversation group where system bandwidth and i-th of session
Grade determines.
Second aspect, the resource allocation system of the multicast service includes the first configuration module, for Physical Multicast Channel
The Modulation and Coding Scheme grade of upper session is configured, and first configuration module includes:
Midpoint user's determination unit, for determining the midpoint user of each cell in multicast broadcast single frequency network region, institute
Stating midpoint user is user of the Signal to Interference plus Noise Ratio in the first preset range in affiliated subdistrict；
First computing unit, the channel matter obtained in each detection cycle for the midpoint user according to each cell
Detection values calculate the channel quality detection average value of the midpoint user of respective cell in each detection cycle；
Determination unit, for determining in each detection cycle in the channel quality detection average value of each cell most
Modulation and Coding Scheme grade corresponding to low value；
First configuration unit, for corresponding detection week to be arranged according to the corresponding Modulation and Coding Scheme grade of the minimum
In phase on Physical Multicast Channel session Modulation and Coding Scheme grade.
Further, which further includes grouping module, for being grouped to the session on Physical Multicast Channel；
The grouping module is specifically used for:
In a conversation measurement period, the number of the identical session of business service quality classification logotype grade is judged
It whether is more than preset quantity；
If the number is more than the preset quantity, by the identical all sessions of business service quality classification logotype grade
In the session of the shortest preset quantity of minimum latency since session request is initiated to data between transmission be divided into one group.
Further, which further includes the second configuration module, for needed for each session on Physical Multicast Channel
Subframe total quantity is configured；
Second configuration module includes:
Second computing unit, for the ratio of the guarantee according to corresponding to each of conversation group session on Physical Multicast Channel
The Modulation and Coding Scheme grade of special rate, system bandwidth and place conversation group calculates the session period of corresponding session；
Third computing unit, the least common multiple in the session period for calculating all sessions in the conversation group, by institute
State group period of the least common multiple as the conversation group；
Second configuration unit, for the session week according to each session in the group period of the conversation group and the conversation group
Phase calculates subframe total quantity required for corresponding session, and is configured according to the subframe total quantity to corresponding session.
Resource allocation methods and system of the invention only have chosen midpoint user, and it is average to solve its channel quality detection
It is worth, and indicates the channel quality detection average value of entire cell with the channel quality detection average value of midpoint user, reduces work
It measures.Midpoint user can choose according to the characteristics of user, compile it is achieved that choosing corresponding modulation according to user's feature
The purpose of code scheme grade.
Detailed description of the invention
The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, and attached drawing is schematically without that should manage
Solution is carries out any restrictions to the present invention, in the accompanying drawings:
Fig. 1 shows a kind of flow diagram of embodiment of resource allocation methods of multicast service according to the present invention；
Fig. 2 shows in the resource allocation methods of multicast service of the present invention to needed for each session on Physical Multicast Channel
The flow diagram that subframe total quantity is configured；
Fig. 3 shows a kind of structural block diagram of embodiment of resource allocation system of multicast service according to the present invention.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
The present invention provides a kind of resource allocation methods of multicast service, as shown in Figure 1, this method includes believing physical multicast
The Modulation and Coding Scheme grade of session on road is configured, and the configuration process includes:
S1, the midpoint user for determining each cell in multicast broadcast single frequency network region, the midpoint user are affiliated small
User of the Signal to Interference plus Noise Ratio in the first preset range in area, the Signal to Interference plus Noise Ratio are Signal to Interference plus Noise Ratio (Signal to
Interference plus Noise Ratio, i.e. sinr)；
S2, the channel quality detection value obtained in each detection cycle according to the midpoint user of each cell are calculated
The channel quality detection average value of the midpoint user of respective cell in each detection cycle；
S3, it determines corresponding to minimum in each detection cycle in the channel quality detection average value of each cell
Modulation and Coding Scheme grade；
S4, according to the corresponding Modulation and Coding Scheme grade of the minimum, physical multicast is set in corresponding detection cycle and is believed
The Modulation and Coding Scheme grade of session on road.
Wherein, channel quality detection value can be the size of channel quality indicator CQI, naturally it is also possible to being capable of table for other
The size of the parameter of reference road quality.
Wherein, the first preset range sets itself, such as [4,8] according to the actual situation, i.e., Signal to Interference plus Noise Ratio is between 4~8
User be midpoint user.
The present invention only has chosen certain customers, solves its channel quality detection average value, and with the letter of the certain customers
Road quality testing average value indicates the channel quality detection average value of entire cell, reduces workload.Meanwhile realizing basis
User's feature chooses corresponding Modulation and Coding Scheme grade.
In addition, due in channel quality detection average value of the present invention according to each cell in multicast broadcast single frequency network region
Modulation and Coding Scheme grade MCS corresponding to minimuminit, the Modulation and Coding Scheme grade of session is configured, ensure that
User in multicast broadcast single frequency network region in all cells can normally receive data, can use conjunction for edge customer
And the MBMS data of multiple neighboring communities is received to meet the quality of reception.Therefore, The invention also achieves guaranteeing the quality of reception
On the basis of, make the user in multicast broadcast single frequency network region in all cells that can normally receive the purpose of data.
In the specific implementation process of above-mentioned technical proposal, in order to avoid cell in individual detection cycles identified institute
State that Modulation and Coding Scheme change of rank corresponding to minimum is excessive, so that the modulating-coding side configured according to the value to session
Case grade changes excessive therewith, can carry out certain smoothing processing, the process of smoothing processing are as follows:
Modulating-coding corresponding to the minimum identified in each detection cycle after first detection cycle
Scheme grade is smoothed.The corresponding Modulation and Coding Scheme of the identified minimum in current detection cycle
It, can be according to the minimum in a detection cycle of the current period or multiple detection cycles when grade is smoothed
Corresponding Modulation and Coding Scheme grade is smoothed.The corresponding Modulation and Coding Scheme grade of the minimum in the S4
For the analog value after smoothing processing.
Due to the channel quality detection being calculated in the corresponding Modulation and Coding Scheme grade of minimum in S3 and S2
Average value is can be directly corresponding, therefore smoothing processing can be with are as follows:
To the channel quality detection average value being calculated in each detection cycle after first detection cycle
It is smoothed.The channel quality detection average value being calculated within to the current detection period is smoothed
When, it can be carried out according to the channel quality detection average value in a detection cycle of the current period or multiple detection cycles smooth
Processing.Channel quality detection average value in the S3 is the analog value after smoothing processing.
It, can the corresponding Modulation and Coding Scheme of the minimum etc. in the above-mentioned technical solutions in the specific implementation of step S4
Grade MCSinitIt is allocated to each session on Physical Multicast Channel.Certainly, due to the business service quality classification logotype of each session
Grade, that is, QCI grade is different, can also be according to the QCI grade of each session, to its Modulation and Coding Scheme in MCSinitBasis
On be adjusted so that for different multicast services use different Modulation and Coding Scheme grade, that is, MCS grades so that multicast
The configuration of resource is more rationally and flexible.Its detailed process can be with are as follows:
Judge the business service quality classification logotype grade of each session and the business service quality class of the second preset range
Not Biao Shi grade relationship；
If the business service quality classification logotype grade of corresponding session is lower than the business service matter of second preset range
Measure the lowest class in classification logotype grade, then it is the corresponding Modulation and Coding Scheme grade up-regulation first of the minimum is default etc.
Grade, and using the Modulation and Coding Scheme grade after up-regulation as the Modulation and Coding Scheme grade of the corresponding session；
If the business service quality classification logotype grade of corresponding session is in the business service quality of second preset range
In classification logotype grade, then using the corresponding Modulation and Coding Scheme grade of the minimum as the modulating-coding of the corresponding session
Scheme grade；
If the business service quality classification logotype grade of corresponding session is higher than the business service matter of second preset range
Measure the highest level in classification logotype grade, then it is the corresponding Modulation and Coding Scheme grade downward second of the minimum is default etc.
Grade, and using the Modulation and Coding Scheme grade after downward as the Modulation and Coding Scheme grade of the corresponding session.
Above-mentioned detailed process is further illustrated with an example below:
The second preset range is set as { 2,3 }, when the QCI grade of a session is 2 or 3, the modulating-coding etc. of the session
Grade is set as the corresponding Modulation and Coding Scheme grade MCS of minimuminit, i.e., by MCSinitBe allocated to QCI grade be 2 or 3 it is more
Broadcast business.When the QCI grade of a session is 1, then by the Modulation and Coding Scheme grade of the session in MCSinitOn the basis of raise δ
A grade, i.e., by MCSinit+ δ is allocated to the multicast service that QCI grade is 1.When the QCI grade of a session is 4, then by the session
Modulation and Coding Scheme grade in MCSinitOn the basis of lower ξ grade, i.e., by MCSinit- ξ be allocated to QCI grade be 4 it is more
Broadcast business.
In addition, the S3 and S4 can be by multiple cell multicast coordination entities in the specific implementation process of above-mentioned technical proposal
It executes.Specific implementation process can be with are as follows: multiple cell multicast coordination entity obtains the letter of each cell in the region MBSFN
Road quality testing average value, then carries out subsequent operation.
The prior art is only grouped according to QCI grade when being grouped.Due on a Physical Multicast Channel
29 sessions of carrying are only capable of, the case where when the identical number of QCI grade occur and being more than 29, then only according to QCI grade
Grouping is unreasonable.So the present invention is directed to the defect, additionally provide a kind of to broadcasting coordination entity on Physical Multicast Channel
The method that is grouped of session, specifically include:
In a conversation measurement period, the number of the identical session of business service quality classification logotype grade is judged
It whether is more than preset quantity；
If the number is more than the preset quantity, by the identical all sessions of business service quality classification logotype grade
In the session of the shortest preset quantity of minimum latency since session request is initiated to data between transmission be divided into one group.
One Physical Multicast Channel can at most carry 29 sessions, therefore preset quantity can be set as 29.Ginseng therein
Number: the minimum latency since session request is initiated to data between transmission, English are expressed as Minimum Time to
MBMS Data Transfer。
This method first determines whether the business service quality classification logotype grade i.e. number of the identical session of QCI grade, then
For different situations, it is grouped using different methods.Wherein, when the identical session number of QCI grade is more than preset quantity,
It is selected according to parameter " minimum latency since session request is initiated to data between transmission ", selects minimum etc.
It is divided into one group to time shortest preset quantity session.As it can be seen that the invention proposes one kind when the identical session of QCI grade
A kind of solution when number is more than 29, meanwhile, also meet the minimum latency of all sessions.
It wherein, can be by the business service quality classification logotype when the number is less equal than the preset quantity
The identical all sessions of grade are divided into one group.
In the specific implementation process of above-mentioned packet mode, preset quantity can be selected by way of sorting or searching
Session.Wherein, sortord can be with are as follows:
According to the length of the minimum latency since session request is initiated to data between transmission, by business service matter
The identical all sessions of amount classification logotype grade are ranked up；
According to ranking results, the shorter session of the minimum latency more preferentially enters grouping, until entering described point
The quantity of group reaches the preset quantity.
In such a way that sequencing selection goes out the session of preset quantity, simple, Yi Shixian.
The group technology can be executed using multiple cell multicast coordination entity.
In the prior art, when to period assignment is carried out to the conversation group on Physical Multicast Channel, there is no one kind specifically,
Targetedly session cycle determination method.In this regard, the invention also includes the group periods to group session each on Physical Multicast Channel
It is configured with subframe total quantity needed for each session, as shown in Fig. 2, specifically including:
A1, guarantee bit rate, system band according to corresponding to each of conversation group session on Physical Multicast Channel
Wide and place conversation group Modulation and Coding Scheme grade, calculates the session period of corresponding session；
A2, the least common multiple for calculating the session period of all sessions in the conversation group, the least common multiple is made
For the group period of the conversation group；
A3, the session period for organizing each session in period and the conversation group according to the conversation group, calculate corresponding meeting
Subframe total quantity required for talking about, and corresponding session is configured according to the subframe total quantity.
Wherein, the group period should be understood as the session period an of conversation group, due to the session that group period is all sessions
The least common multiple in period, therefore organize the integral multiple in the session period that the period is a session.Here, the concept of conversation group with point
The concept of group is identical, is divided into one group of all sessions and forms words group for a moment.
Wherein, in the specific implementation that the session period is configured, the session period of corresponding session can pass through following sides
Formula obtains:
According to the data volume that the ensures bit rate of corresponding session and a subframe are transmitted, unit of account accordingly can in the time
Talk about the number of sub frames needed；
According to the number of sub frames that session corresponding in the unit time needs, the session period of corresponding session is calculated.
It can specifically be calculated by using the following formula:
Wherein, 1≤i≤M, M are the number of session in each conversation group, TiFor the session period of i-th of session, NiFor list
The number of sub frames that i-th of session needs in the time of position, NiFor the value after rounding up；QiIt is passed by a subframe of i-th of session
Defeated data volume, QiThe Modulation and Coding Scheme grade of conversation group determines where system bandwidth and i-th of session.
Subframe total quantity required for i-th of session is W/Ti。
The configuration process in the session period can be executed by multiple cell multicast coordination entity.The present invention provides a kind of specific
Session period assignment method, and this method have the advantages that calculate it is simple, realize and be easy.
Three major parts in the present invention: (1) the Modulation and Coding Scheme grade of Physical Multicast Channel on session is carried out
Configuration；(2) session on Physical Multicast Channel is grouped；(3) to the session week of group session each on Physical Multicast Channel
Phase is configured.Wherein the configuration of three parts can be associated with, be also possible to (3) partially (1) partially with (2) portion
It is completed on the basis of point.
As shown in figure 3, the system includes first the present invention also provides a kind of resource allocation system 100 of multicast service
Configuration module 101, for being configured to the Modulation and Coding Scheme grade of session on Physical Multicast Channel.The first configuration mould
Block 101 includes:
Midpoint user's determination unit 1011, for determining that the midpoint of each cell in multicast broadcast single frequency network region is used
Family, the midpoint user are user of the Signal to Interference plus Noise Ratio in the first preset range in affiliated subdistrict；
First computing unit 1012, the letter obtained in each detection cycle for the midpoint user according to each cell
Quality testing value in road calculates the channel quality detection average value of the midpoint user of respective cell in each detection cycle；
Determination unit 1013, for determining in each detection cycle in the channel quality detection average value of each cell
Minimum corresponding to Modulation and Coding Scheme grade；
First configuration unit 1014, for corresponding inspection to be arranged according to the corresponding Modulation and Coding Scheme grade of the minimum
Survey the Modulation and Coding Scheme grade of session on Physical Multicast Channel in the period.
Further, which further includes grouping module 102, for being grouped to the session on Physical Multicast Channel；
The grouping module is specifically used for:
In a conversation measurement period, the number of the identical session of business service quality classification logotype grade is judged
It whether is more than preset quantity；
If the number is more than the preset quantity, by the identical all sessions of business service quality classification logotype grade
In the session of the shortest preset quantity of minimum latency since session request is initiated to data between transmission be divided into one group.
Further, which further includes the second configuration module, for needed for each session on Physical Multicast Channel
Subframe total quantity is configured；
Second configuration module 103 includes:
Second computing unit 1031, for the guarantor according to corresponding to each of conversation group session on Physical Multicast Channel
Bit rate, the Modulation and Coding Scheme grade of system bandwidth and place conversation group are demonstrate,proved, the session period of corresponding session is calculated；
Third computing unit 1032, the least common multiple in the session period for calculating all sessions in the conversation group,
Using the least common multiple as the group period of the conversation group；
Wherein, the second computing unit, third computing unit can be integrated the unit of setting, or split settings
Unit.
Second configuration unit 1033, for the meeting according to each session in the group period of the conversation group and the conversation group
The period is talked about, calculates subframe total quantity required for corresponding session, and configure to corresponding session according to the subframe total quantity.
It is having the same beneficial to effect due to the function structure module that the resource allocation system is above-mentioned resource allocation methods
Fruit.Resource allocation side is please referred to each module in the resource allocation system or the explanation of unit, explanation or preferred embodiment
The corresponding portion of method, which is not described herein again.
In conclusion resource allocation methods and the system of multicast service provided by the invention are, it can be achieved that match MCS grade
It sets, the configuration to the grouping of multicast conversation and/or to the session period, ensure that the quality of reception of all cells in the region MBSFN,
Realize the rational utilization of multicast resource.Meanwhile the same of radio resource can be realized using multiple cell multicast coordination entity
Scheduling and planning.
The technical scheme of the present invention has been explained in detail above with reference to the attached drawings, it is contemplated that remains multiple users interference band in the prior art
The problem come.According to the technical solution of the present invention, residual multiple users interference can be reduced, to reduce the various problems of its bring.
In the present invention, term " first ", " second ", " third " are used for description purposes only, and should not be understood as instruction or
Imply relative importance.Term " multiple " refers to two or more, unless otherwise restricted clearly.
Although the embodiments of the invention are described in conjunction with the attached drawings, but those skilled in the art can not depart from this hair
Various modifications and variations are made in the case where bright spirit and scope, such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (8)
1. a kind of resource allocation methods of multicast service, which is characterized in that including the modulation volume to session on Physical Multicast Channel
Code scheme grade is configured, and the configuration process includes:
S1, the midpoint user for determining each cell in multicast broadcast single frequency network region, the midpoint user are in affiliated subdistrict
User of the Signal to Interference plus Noise Ratio in the first preset range；
S2, the channel quality detection value obtained in each detection cycle according to the midpoint user of each cell are calculated every
The channel quality detection average value of the midpoint user of respective cell in one detection cycle；
S3, tune corresponding to minimum in each detection cycle in the channel quality detection average value of each cell is determined
Encoding scheme grade processed；
S4, according to the corresponding Modulation and Coding Scheme grade of the minimum, be arranged in corresponding detection cycle on Physical Multicast Channel
The Modulation and Coding Scheme grade of session；Wherein,
Further include being configured to subframe total quantity needed for each session on Physical Multicast Channel, specifically include:
A1, guarantee bit rate, system bandwidth according to corresponding to each of conversation group session on Physical Multicast Channel and
The Modulation and Coding Scheme grade of place conversation group calculates the session period of corresponding session；
A2, the least common multiple for calculating the session period of all sessions in the conversation group, using the least common multiple as institute
State the group period of conversation group；
A3, the session period for organizing each session in period and the conversation group according to the conversation group, calculate corresponding session institute
The subframe total quantity needed, and corresponding session is configured according to the subframe total quantity.
2. the method according to claim 1, wherein
In the S2 further include: to the channel quality being calculated in each detection cycle after first detection cycle
Detection average value is smoothed；The channel quality detection average value in the S3 is the analog value after smoothing processing；
Or
In the S3 further include: corresponding to the minimum identified in each detection cycle after first detection cycle
Modulation and Coding Scheme grade be smoothed；The corresponding Modulation and Coding Scheme grade of the minimum in the S4 is flat
Sliding treated analog value.
3. the method according to claim 1, wherein the S4 includes:
Judge the business service quality classification logotype grade of each session and the business service quality classification mark of the second preset range
Know the relationship of grade；
If the business service quality classification logotype grade of corresponding session is lower than the business service quality class of second preset range
Not Biao Shi the lowest class in grade, then the corresponding Modulation and Coding Scheme grade of the minimum is raised into the first predetermined level,
And using the Modulation and Coding Scheme grade after up-regulation as the Modulation and Coding Scheme grade of the corresponding session；
If the business service quality classification logotype grade of corresponding session is in the business service quality classification of second preset range
It identifies in grade, then using the corresponding Modulation and Coding Scheme grade of the minimum as the Modulation and Coding Scheme of the corresponding session
Grade；
If the business service quality classification logotype grade of corresponding session is higher than the business service quality class of second preset range
Not Biao Shi highest level in grade, then the corresponding Modulation and Coding Scheme grade of the minimum is lowered into the second predetermined level,
And using the Modulation and Coding Scheme grade after downward as the Modulation and Coding Scheme grade of the corresponding session.
4. the method according to claim 1, wherein further including dividing the session on Physical Multicast Channel
Group specifically includes:
In a conversation measurement period, judge the identical session of business service quality classification logotype grade number whether
More than preset quantity；
If the number be more than the preset quantity, by the identical all sessions of business service quality classification logotype grade from
The session that session request initiates to data to start the shortest preset quantity of minimum latency between transmission is divided into one group.
5. according to the method described in claim 4, it is characterized in that, described that business service quality classification logotype grade is identical
The session of the shortest preset quantity of minimum latency in all sessions since session request is initiated to data between transmission
It is divided into one group, comprising:
According to the length of the minimum latency since session request is initiated to data between transmission, by business service quality class
Not Biao Shi the identical all sessions of grade be ranked up；
According to ranking results, the shorter session of the minimum latency more preferentially enters grouping, until entering the grouping
Quantity reaches the preset quantity.
6. the method according to claim 1, wherein the session period of corresponding session passes through following formula meter in the A1
It calculates:
Wherein, 1≤i≤M, M are the number of session in each conversation group, TiFor the session period of i-th of session, NiWhen for unit
The number of sub frames that interior i-th of session needs, GBRsession-iFor the ensures bit rate of i-th of session, QiIt is the one of i-th of session
The data volume that a subframe is transmitted, QiThe Modulation and Coding Scheme grade of conversation group determines where system bandwidth and i-th of session.
7. a kind of resource allocation system of multicast service, which is characterized in that including the first configuration module, for believing physical multicast
The Modulation and Coding Scheme grade of session on road is configured, and first configuration module includes:
Midpoint user's determination unit, for determining the midpoint user of each cell in multicast broadcast single frequency network region, it is described in
Point user is user of the Signal to Interference plus Noise Ratio in the first preset range in affiliated subdistrict；
First computing unit, the channel quality inspection obtained in each detection cycle for the midpoint user according to each cell
Measured value calculates the channel quality detection average value of the midpoint user of respective cell in each detection cycle；
Determination unit, for determining the minimum in each detection cycle in the channel quality detection average value of each cell
Corresponding Modulation and Coding Scheme grade；
First configuration unit, for being arranged in corresponding detection cycle according to the corresponding Modulation and Coding Scheme grade of the minimum
The Modulation and Coding Scheme grade of session on Physical Multicast Channel；Wherein,
It further include the second configuration module, for being configured to subframe total quantity needed for each session on Physical Multicast Channel；
Second configuration module includes:
Second computing unit, for the speed of the guarantee bit according to corresponding to each of conversation group session on Physical Multicast Channel
The Modulation and Coding Scheme grade of rate, system bandwidth and place conversation group calculates the session period of corresponding session；
Third computing unit, the least common multiple in the session period for calculating all sessions in the conversation group, by described in most
Group period of the small common multiple as the conversation group；
Second configuration unit, for according to the conversation group group the period and the conversation group in each session the session period,
Subframe total quantity required for corresponding session is calculated, and corresponding session is configured according to the subframe total quantity.
8. system according to claim 7, which is characterized in that further include grouping module, for Physical Multicast Channel
Session be grouped；
The grouping module is specifically used for:
In a conversation measurement period, judge the identical session of business service quality classification logotype grade number whether
More than preset quantity；
If the number be more than the preset quantity, by the identical all sessions of business service quality classification logotype grade from
The session that session request initiates to data to start the shortest preset quantity of minimum latency between transmission is divided into one group.
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| CN1866782A (en) * | 2005-05-18 | 2006-11-22 | 华为技术有限公司 | Method for realizing system broadcast multicast service |
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| CN102186147A (en) * | 2011-05-16 | 2011-09-14 | 大唐移动通信设备有限公司 | Multimedia broadcast and multicast service (MBMS) data stream transmission method, base station and user equipment (UE) |
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| US20100269142A1 (en) * | 2009-04-16 | 2010-10-21 | Nec Laboratories America, Inc. | Utility optimization for scalable video multicast in wireless systems |
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| CN1866782A (en) * | 2005-05-18 | 2006-11-22 | 华为技术有限公司 | Method for realizing system broadcast multicast service |
| CN101242566A (en) * | 2007-02-08 | 2008-08-13 | 鼎桥通信技术有限公司 | Transmission method, system and base station for multimedia broadcasting and multicast service |
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