CN104302005B - The resource allocation methods and system of virtual Private Network based on TD-LTE - Google Patents
The resource allocation methods and system of virtual Private Network based on TD-LTE Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
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Abstract
The present invention provides a kind of resource allocation methods of virtual Private Network based on TD-LTE, include the following steps: CQI value obtaining step, load calculation step, calculate reserved resource block number step, reserved resource block step, resource allocation step.The beneficial effects of the present invention are: the present invention maximizes power system capacity under the resource use for guaranteeing high-priority users, it is proposed the resource allocation methods that improved dynamic priority divides, this method combines the function and frequency diversity gain characteristic of LTE, improves performance of the private network in terms of transmission rate, power system capacity and system multiplexing.
Description
Technical field
The present invention relates to the communications fields, more particularly to the resource allocation methods and system of the virtual Private Network based on TD-LTE.
Background technique
It is increasingly convex for the status of the trunked communication system of the demand of specific industry user in the existing communications field
It is aobvious.Trunked communication system is around scheduling and commanders business mostly using wireless communication system, thus different industries and portion
Door also has different performance requirements to trunked communication system.For example, state security department, very high to network delay requirement, it must
Short time-delay, high reliability and the trunked communication system of safety must be established；Transport and service industry are then to support number of users
Have higher requirements with coverage area, need to establish number of users mostly with the trunked communication system of wide coverage.
On December 4th, 2013, the Ministry of Industry and Information Technology have formally provided to China Mobile, China Telecom, China Unicom
Four third-generation mobile communication business licence plates.TD-LTE system downlink uses OFDM (orthogonal frequency division
Multiplexing) orthogonal frequency division multiplexi, on the one hand, OFDM technology can effectively eliminate intersymbol as modulation technique
Interference；The agile frequency allocation plan that another aspect OFDM is used, data are distributed on multiple resource blocks and are transmitted, and realize frequency
Rate diversity gain also greatly improves throughput of system.Now trunked communication system in practical applications is not based on TD-LTE
Digital clustering communication system, therefore the digital clustering communication system based on TD-LTE needs further research and development.Existing set of digits
Group communication system cost is very high, and can only design for particular requirement, and reusability is very low, while priority fixed partition, makes
It is reduced at resource free time and power system capacity.
Summary of the invention
In order to solve the problems in the prior art, the present invention provides the resources of a kind of virtual Private Network based on TD-LTE point
Method of completing the square.
The present invention provides a kind of resource allocation methods of virtual Private Network based on TD-LTE, include the following steps:
CQI value obtaining step: evolution base station all channel sends reference signal to user, and user estimates CQI value and is reported to
Evolution base station, evolution base station record CQI value；
Load calculation step: according to load threshold table, determination needs to divide priority number；
It calculates reserved resource block number step: according to corresponding priority users in total user's proportion, calculating and need to give
The reserved resource block number of high-priority users, remaining resource block leave non-high priority user use for；
Reserved resource block step: using corresponding reserved resource according to the priority of user, if non-high priority user,
Then using the resource block for not being calibrated priority；
Resource allocation step: first resource block that each accessing user gets is the user in the complete of corresponding priority
The resource block of highest channel gain is obtained in portion's resource block；The first round each user has got a resource block, calculates accordingly
Capacity ratio the R/ γ, R of all users is resource block transmission rate, and γ is signal-to-noise ratio, if in the resource block of corresponding priority
There is the resource block being not used by, then distributed one by one according to capacity than from low to high, then one resource block of every sub-distribution updates every
The capacity data R that a user obtains is distributed after update according to new capacity is more ascending than continuation, one by one until having divided；Commonly
User does not reserve resource block, directly distributes resource in remaining resource block.
As a further improvement of the present invention, in the load calculation step: evolution base station passes through wireless resource management
Entity calculates cell load, ρcIt is cell load reference value, is defined as Physical Resource Block PRBs and total Physical Resource Block
Ratio,M in formulaPREIn cell must material resources block, DuThe business speed of user's application
Rate, R (SINRu) it is the rate that each resource block of user u can provide, SINRuIt is the Signal to Interference plus Noise Ratio of user u, if
ρc>=1 indicates cell-overload；Determine priority number method are as follows: [0,1] is divided into 9 sections, works as ρc∈[0,α1) when, system at this time
Load minimum, using most priority number m, priority number m < 10 are matched the reason is that LTE system provides 9 priority
It sets, works as ρc∈[α1,α2) when, reduce by a priority number, and so on, work as ρc∈[α8,α9) when, can only guarantee one it is preferential
The user group of grade, priority number 2.
As a further improvement of the present invention, it calculates in reserved resource block number step described: being used according to each priority
Amount accounts for the ratio of total number of users, calculates each priority and needs reserved resource block number:
Wherein, RB_num_priority is that each priority users reserve number of resources, and num_priority is corresponding preferential
Grade number of users；
C (i)={ RB_num_priority (i) }, A=A-C；
Wherein, C (i) is all resource set of blocks for keeping for i priority users, and A is whole resource set of blocks.
As a further improvement of the present invention, in the reserved resource block step: according to the channel quality information of CQI,
It is that 1 user group of priority reserves resource by the best Resource Block identification of preceding RB_num_priority (1) a channel quality, according to
Same method is 2 to being priority by the best Resource Block identification of channel quality in remaining resource block, and so on；
Wherein, C (i) is all resource set of blocks for keeping for i priority users, and A is whole resource set of blocks.
As a further improvement of the present invention, in the resource allocation step, high-priority users resource allocation methods
Are as follows: when the user for being 1 to priority distributes resource block, to find each user opposite in keeping for the resource that priority is 1
The resource block for obtaining maximum gain, and allocates it to the user, updates transmission speed data, by remaining reserved resource according to
Capacity is than the ascending user for distributing to all priority and being 1, one RB of every sub-distribution, until reserved resource allocation is complete；It is general
Logical subscriber data distribution method are as follows: for all ordinary users, first distribute 1 relative channel gain maximum resource to each user
Block, remaining resource according to capacity than ascending distribution, until being assigned.
The invention also discloses a kind of resource allocation systems of virtual Private Network based on TD-LTE, comprising:
CQI value obtains module: send reference signal to user for evolution base station all channel, user estimate CQI value and on
Evolution base station is offered, evolution base station records CQI value；
Load computing module: for according to load threshold table, determination to need to divide priority number；
Calculate reserved resource block number module: for, in total user's proportion, calculating to need according to corresponding priority users
The resource block number to reserve to high-priority users, remaining resource block leave non-high priority user use for；
Reserved resource block module: for using corresponding reserved resource according to the priority of user, if non-high priority
User, then using the resource block for not being calibrated priority；
Resource distribution module: first resource block got for each accessing user is the user in corresponding priority
Whole resource blocks in obtain highest channel gain resource block；The first round each user has got a resource block, accordingly
Capacity ratio the R/ γ, R for calculating all users are resource block transmission rate, and γ is signal-to-noise ratio, if in the resource of corresponding priority
There is the resource block being not used by block, is then distributed one by one according to capacity than from low to high, one resource block of every sub-distribution, then more
The capacity data R that new each user obtains is distributed after update according to new capacity is more ascending than continuation, one by one until having divided；
Ordinary user does not reserve resource block, directly distributes resource in remaining resource block.
As a further improvement of the present invention, in the load computing module: evolution base station passes through wireless resource management
Entity calculates cell load, ρcIt is cell load reference value, is defined as Physical Resource Block PRBs and total Physical Resource Block
Ratio,M in formulaPREIn cell must material resources block, DuThe business speed of user's application
Rate, R (SINRu) it is the rate that each resource block of user u can provide, SINRuIt is the Signal to Interference plus Noise Ratio of user u, if
ρc>=1 indicates cell-overload；Determine priority number method are as follows: [0,1] is divided into 9 sections, works as ρc∈[0,α1) when, system at this time
Load minimum, using most priority number m, priority number m < 10 are matched the reason is that LTE system provides 9 priority
It sets, works as ρc∈[α1,α2) when, reduce by a priority number, and so on, work as ρc∈[α8,α9) when, can only guarantee one it is preferential
The user group of grade, priority number m.
As a further improvement of the present invention, it calculates in reserved resource block number module described: being used according to each priority
Amount accounts for the ratio of total number of users, calculates each priority and needs reserved resource block number:
Wherein, RB_num_priority is that each priority users reserve number of resources, and num_priority is corresponding preferential
Grade number of users；
C (i)={ RB_num_priority (i) }, A=A-C；
Wherein, C (i) is all resource set of blocks for keeping for i priority users, and A is whole resource set of blocks.
As a further improvement of the present invention, in the reserved resource block module: according to the channel quality information of CQI,
It is that 1 user group of priority reserves resource by the best Resource Block identification of preceding RB_num_priority (1) a channel quality, according to
Same method is 2 to being priority by the best Resource Block identification of channel quality in remaining resource block, and so on；
Wherein, C (i) is all resource set of blocks for keeping for i priority users, and A is whole resource set of blocks.
As a further improvement of the present invention, in the resource distribution module, high-priority users resource allocation methods
Are as follows: when the user for being 1 to priority distributes resource block, to find each user opposite in keeping for the resource that priority is 1
The resource block for obtaining maximum gain, and allocates it to the user, updates transmission speed data, by remaining reserved resource according to
Capacity is than the ascending user for distributing to all priority and being 1, one RB of every sub-distribution, until reserved resource allocation is complete；It is general
Logical subscriber data distribution method are as follows: for all ordinary users, first distribute 1 relative channel gain maximum resource to each user
Block, remaining resource according to capacity than ascending distribution, until being assigned.
Hold the beneficial effects of the present invention are: the present invention maximizes system under the resource use for guaranteeing high-priority users
Amount, proposes the resource allocation methods that improved dynamic priority divides, and this method combines the function and frequency diversity gain of LTE
Characteristic improves performance of the private network in terms of transmission rate, power system capacity and system multiplexing.
Specific embodiment
The invention discloses a kind of resource allocation methods of virtual Private Network based on TD-LTE, include the following steps:
CQI value obtaining step: evolution base station all channel sends reference signal to user, and user estimates CQI value and is reported to
Evolution base station, evolution base station record CQI value, which is that (cell is special by cell specific reference signal
With reference signal), the value of the CQI of acquisition is and the money that channel quality is best in order to by all resource block sequencings to be allocated
Source block keeps for high-priority users；
Load calculation step: according to load threshold table, determination needs to divide priority number；
It calculates reserved resource block number step: according to corresponding priority users in total user's proportion, calculating and need to give
The reserved resource block number of high-priority users, remaining resource block leave non-high priority user use for；
Reserved resource block step: using corresponding reserved resource according to the priority of user, if non-high priority user,
Then using the resource block for not being calibrated priority；
Resource allocation step: first resource block that each accessing user gets is the user in the complete of corresponding priority
The resource block of highest channel gain is obtained in portion's resource block；The first round each user has got a resource block, calculates accordingly
Capacity ratio the R/ γ, R of all users is resource block transmission rate, and γ is signal-to-noise ratio, if in the resource block of corresponding priority
There is the resource block being not used by, then distributed one by one according to capacity than from low to high, then one resource block of every sub-distribution updates every
The capacity data R that a user obtains is distributed after update according to new capacity is more ascending than continuation, one by one until having divided；Commonly
User does not reserve resource block, resource is directly distributed in remaining resource block, distribution method is same as mentioned above.
In the load calculation step: evolution base station calculates cell load, ρ by radio resource management entitycIt is small
Area's load reference value is defined as the ratio of Physical Resource Block PRBs and total Physical Resource Block,M in formulaPREIn cell must material resources block, DuThe service rate of user's application, R
(SINRu) it is the rate that each resource block of user u can provide, SINRuIt is the Signal to Interference plus Noise Ratio of user u, if ρc≥
1 indicates cell-overload；Determine priority number method are as follows: [0,1] is divided into 9 sections, works as ρc∈[0,α1) when, system load at this time
It is minimum, using most priority number m, priority number m < 10, the reason is that LTE system provides 9 priority configurations, when
ρc∈[α1,α2) when, reduce by a priority number, and so on, work as ρc∈[α8,α9) when, it can only guarantee a priority
User group, priority number 2.
It is calculated in reserved resource block number step described: total number of users is accounted for according to each priority users number
Ratio, calculate each priority and need reserved resource block number:
Wherein, RB_num_priority is that each priority users reserve number of resources, and num_priority is corresponding preferential
Grade number of users；
C (i)={ RB_num_priority (i) }, A=A-C；
Wherein, C (i) is all resource set of blocks for keeping for i priority users, and A is whole resource set of blocks.
In the reserved resource block step: according to the channel quality information of CQI, preceding RB_num_priority (1) is a
The best Resource Block identification of channel quality is that 1 user group of priority reserves resource, after the same method in remaining resource
It is priority by the best Resource Block identification of channel quality in block is 2, and so on；
Wherein, C (i) is all resource set of blocks for keeping for i priority users, and A is whole resource set of blocks.
High-priority users resource allocation:
When the user for being 1 to priority distributes resource block, each user is found in keeping for the resource that priority is 1
The opposite resource block for obtaining maximum gain, and the user is allocated it to,
Ωk=Ωk∪ { n }, C (1)=C (1)-{ n }；
Transmission speed data are updated,
Remaining reserved resource is ascending according to capacity ratio (R/ γ, R are resource block transmission rate, and γ is signal-to-noise ratio)
Distribute to the user that all priority are 1, one RB of every sub-distribution, until reserved resource allocation is complete.
In formula: hk,nIt is channel gain of k-th of user on n-th of RB,It is k-th of user
Interchannel noise ratio on n-th of RB, ΩkIt is allocated to the RB set of user k, nsizeIt is the son load for each RB that system provides
Wave number mesh, pk,nIt is power of k-th of user on n-th of RB (resource block).
Ordinary user's resource allocation:
For all ordinary users, 1 relative channel gain maximum resource block first is distributed to each user.
Ωk=Ωk∪ { n }, A=A- { n }；
Remaining resource is according to capacity ratio (R/ γ) ascending distribution, until being assigned.
n1=argmin | Rk/γk,n|,n∈A
Ωk=Ωk∪{n1, A=A- { n1}；
Update transmission speed data
In formula: hk,nIt is channel gain of k-th of user on n-th of RB,It is k-th of user
Interchannel noise ratio on n-th of RB, ΩkIt is allocated to the RB set of user k, nsizeIt is the son load for each RB that system provides
Wave number mesh, pk,nIt is power of k-th of user on n-th of RB (resource block).
The invention also discloses a kind of resource allocation systems of virtual Private Network based on TD-LTE, comprising:
CQI value obtains module: send reference signal to user for evolution base station all channel, user estimate CQI value and on
Evolution base station is offered, evolution base station records CQI value；
Load computing module: for according to load threshold table, determination to need to divide priority number；
Calculate reserved resource block number module: for, in total user's proportion, calculating to need according to corresponding priority users
The resource block number to reserve to high-priority users, remaining resource block leave non-high priority user use for；
Reserved resource block module: for using corresponding reserved resource according to the priority of user, if non-high priority
User, then using the resource block for not being calibrated priority；
Resource distribution module: first resource block got for each accessing user is the user in corresponding priority
Whole resource blocks in obtain highest channel gain resource block；The first round each user has got a resource block, accordingly
Capacity ratio the R/ γ, R for calculating all users are resource block transmission rate, and γ is signal-to-noise ratio, if in the resource of corresponding priority
There is the resource block being not used by block, is then distributed one by one according to capacity than from low to high, one resource block of every sub-distribution, then more
The capacity data R that new each user obtains is distributed after update according to new capacity is more ascending than continuation, one by one until having divided；
Ordinary user does not reserve resource block, directly distributes resource in remaining resource block.
In the load computing module: evolution base station calculates cell load, ρ by radio resource management entitycIt is small
Area's load reference value is defined as the ratio of Physical Resource Block PRBs and total Physical Resource Block,M in formulaPREIn cell must material resources block, DuThe service rate of user's application, R
(SINRu) it is the rate that each resource block of user u can provide, SINRuIt is the Signal to Interference plus Noise Ratio of user u, if ρc≥
1 indicates cell-overload；Determine priority number method are as follows: [0,1] is divided into 9 sections, works as ρc∈[0,α1) when, system load at this time
It is minimum, using most priority number m, priority number m < 10, the reason is that LTE system provides 9 priority configurations, when
ρc∈[α1,α2) when, reduce by a priority number, and so on, work as ρc∈[α8,α9) when, it can only guarantee a priority
User group, priority number 2.
It is calculated in reserved resource block number module described: total number of users is accounted for according to each priority users number
Ratio, calculate each priority and need reserved resource block number:
Wherein, RB_num_priority is that each priority users reserve number of resources, and num_priority is corresponding preferential
Grade number of users；
C (i)={ RB_num_priority (i) }, A=A-C；
Wherein, C (i) is all resource set of blocks for keeping for i priority users, and A is whole resource set of blocks.
In the reserved resource block module: according to the channel quality information of CQI, preceding RB_num_priority (1) is a
The best Resource Block identification of channel quality is that 1 user group of priority reserves resource, after the same method in remaining resource
It is priority by the best Resource Block identification of channel quality in block is 2, and so on；
Wherein, C (i) is all resource set of blocks for keeping for i priority users, and A is whole resource set of blocks.
In the resource distribution module, high-priority users resource allocation methods are as follows:
When the user for being 1 to priority distributes resource block, each user is found in keeping for the resource that priority is 1
The opposite resource block for obtaining maximum gain, and the user is allocated it to,
Ωk=Ωk∪ { n }, C (1)=C (1)-{ n }；
Transmission speed data are updated,
Remaining reserved resource is ascending according to capacity ratio (R/ γ, R are resource block transmission rate, and γ is signal-to-noise ratio)
Distribute to the user that all priority are 1, one RB of every sub-distribution, until reserved resource allocation is complete.
In formula: hk,nIt is channel gain of k-th of user on n-th of RB,It is k-th of user
Interchannel noise ratio on n-th of RB, ΩkIt is allocated to the RB set of user k, nsizeIt is the son load for each RB that system provides
Wave number mesh, pk,nIt is power of k-th of user on n-th of RB (resource block).
In the resource distribution module, ordinary user's resource allocation:
For all ordinary users, 1 relative channel gain maximum resource block first is distributed to each user.
Ωk=Ωk∪ { n }, A=A- { n }；
Remaining resource is according to capacity ratio (R/ γ) ascending distribution, until being assigned.
n1=argmin | Rk/γk,n|,n∈A
Ωk=Ωk∪{n1, A=A- { n1}；
Update transmission speed data
In formula: hk,nIt is channel gain of k-th of user on n-th of RB,It is k-th of user
Interchannel noise ratio on n-th of RB, ΩkIt is allocated to the RB set of user k, nsizeIt is the son load for each RB that system provides
Wave number mesh, pk,nIt is power of k-th of user on n-th of RB (resource block).
LTE is the abbreviation of Long Term Evolution, is by 3GPP (The 3rd Generation
Partnership Project, third generation affiliate) tissue customization UNTS (Universal Mobile
Telecommunications System, Universal Mobile Communication System) technical standard long term evolution.Virtual Private Network is in public affairs
With dedicated network is established on network, coded communication is carried out.The virtual Private Network under LTE public network is designed, infrastructure can be reduced
Investment, raising private network use scope, while public network easy to accomplish are exchanged with private network.
The present invention maximizes power system capacity under the resource use for guaranteeing high-priority users, proposes improved dynamic priority
The resource allocation methods that grade divides, this method combine the function and frequency diversity gain characteristic of LTE, improve private network and transmitting
Performance in terms of rate, power system capacity and system multiplexing.
And the resource allocation methods and system of the virtual Private Network of the invention based on TD-LTE are based on system load,
It is dynamically determined System Priority number of stages, allocates resource in advance for high priority, in the resource allocation for meeting high-priority users
Under, raising overall system capacity, ordinary user do not allocate resource in advance as far as possible, directly match resource according to capacity score；Dynamically
Priority planning point can be directed to different system load situations and user demand optimization system capacity；Reserved resource block is to high preferential
Grade user can guarantee the use of high-priority users, while the resource allocation in each priority group uses the ratio based on capacity ratio
Example fair allocat, ensure that with this with the fairness between group user.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (4)
1. a kind of resource allocation methods of the virtual Private Network based on TD-LTE, which comprises the steps of:
CQI value obtaining step: evolution base station all channel sends reference signal to user, and user estimates CQI value and is reported to evolution
Base station, evolution base station record CQI value；
Load calculation step: according to load threshold table, determination needs to divide priority number；
Calculate reserved resource block number step: according to corresponding priority users in total user's proportion, calculating is needed to Gao You
The resource block number that first grade user reserves, remaining resource block leave non-high priority user use for；
Reserved resource block step: corresponding reserved resource is used according to the priority of user, if non-high priority user, makes
With the resource block for not being calibrated priority；
Resource allocation step: first resource block that each accessing user gets is whole moneys of the user in corresponding priority
The resource block of highest channel gain is obtained in source block；The first round each user has got a resource block, calculates accordingly all
Capacity ratio the R/ γ, R of user is resource block transmission rate, and γ is signal-to-noise ratio, if had not in the resource block of corresponding priority
The resource block used is then distributed according to capacity than from low to high one by one, then one resource block of every sub-distribution updates each use
The resource block transmission rate R that family obtains is distributed after update according to new capacity is more ascending than continuation, one by one until having divided；It is general
General family does not reserve resource block, directly distributes resource in remaining resource block；
In the load calculation step: evolution base station calculates cell load, ρ by radio resource management entitycIt is cell load
Reference value is defined as the ratio of Physical Resource Block PRBs and total Physical Resource Block,M in formulaPREIt is Physical Resource Block total in cell, DuIt is the service rate of user's application,
R(SINRu) it is the rate that each resource block of user u can provide, SINRuIt is the Signal to Interference plus Noise Ratio of user u, if ρc
>=1 indicates cell-overload；Determine priority number method are as follows: [0,1] is divided into 9 sections, works as ρc∈[0,α1) when, system is negative at this time
Carry it is minimum, using most priority number m, priority number m < 10, the reason is that LTE system provides 9 priority configurations,
Work as ρc∈[α1,α2) when, reduce by a priority number, and so on, work as ρc∈[α8,α9) when, it can only guarantee a priority
User group, priority number 2；
It is calculated in reserved resource block number step described: accounting for the ratio of total number of users according to each priority users number, calculate
Each priority needs reserved resource block number:
Wherein, RB_num_priority is that each priority users reserve number of resources, and num_priority is that corresponding priority is used
Amount mesh；
C (i)={ RB_num_priority (i) }, A=A-C；
Wherein, C (i) is all resource set of blocks for keeping for i priority users, and A is whole resource set of blocks；Described reserved
In resource block step: according to the channel quality information of CQI, by the best resource of preceding RB_num_priority (1) a channel quality
Block identification is that 1 user group of priority reserves resource, after the same method in remaining resource block that channel quality is best
Resource Block identification be priority be 2, and so on；
Wherein, C (i) is all resource set of blocks for keeping for i priority users, and A is whole resource set of blocks.
2. resource allocation methods according to claim 1, which is characterized in that high preferential in the resource allocation step
Grade subscriber resource distribution method are as follows: when the user for being 1 to priority distributes resource block, priority is being kept for be 1 resource
In find the opposite resource block for obtaining maximum gain of each user, and allocate it to the user, update transmission speed data, will
Remaining reserved resource according to capacity than it is ascending distribute to all priority be 1 user, one RB of every sub-distribution, until
Reserved resource allocation is complete；Ordinary user's data distribution method are as follows: for all ordinary users, first distribute 1 phase to each user
To channel gain maximum resource block, remaining resource according to capacity than ascending distribution, until being assigned.
3. a kind of resource allocation system of the virtual Private Network based on TD-LTE characterized by comprising
CQI value obtains module: sending reference signal to user for evolution base station all channel, user estimates CQI value and is reported to
Evolution base station, evolution base station record CQI value；
Load computing module: for according to load threshold table, determination to need to divide priority number；
Calculate reserved resource block number module: for, in total user's proportion, calculating according to corresponding priority users and needing to give
The reserved resource block number of high-priority users, remaining resource block leave non-high priority user use for；
Reserved resource block module: for using corresponding reserved resource according to the priority of user, if non-high priority user,
Then using the resource block for not being calibrated priority；
Resource distribution module: first resource block got for each accessing user is the user in the complete of corresponding priority
The resource block of highest channel gain is obtained in portion's resource block；The first round each user has got a resource block, calculates accordingly
Capacity ratio the R/ γ, R of all users is resource block transmission rate, and γ is signal-to-noise ratio, if in the resource block of corresponding priority
There is the resource block being not used by, then distributed one by one according to capacity than from low to high, then one resource block of every sub-distribution updates every
The resource block transmission rate R that a user obtains is distributed after update according to new capacity is more ascending than continuation, Zhi Daofen one by one
It is complete；Ordinary user does not reserve resource block, directly distributes resource in remaining resource block；In the load computing module:
Evolution base station calculates cell load, ρ by radio resource management entitycIt is cell load reference value, is defined as physics
The ratio of resource block PRBs and total Physical Resource Block,M in formulaPREIt is object total in cell
Manage resource block, DuIt is the service rate of user's application, R (SINRu) it is the rate that each resource block of user u can provide, SINRu
It is the Signal to Interference plus Noise Ratio of user u, if ρc>=1 indicates cell-overload；Determine priority number method are as follows: by [0,1]
It is divided into 9 sections, works as ρc∈[0,α1) when, system load is minimum at this time, using most priority number m, priority number m < 10,
The reason is that LTE system provides 9 priority configurations, work as ρc∈[α1,α2) when, reduce by a priority number, and so on,
Work as ρc∈[α8,α9) when, it can only guarantee the user group of a priority, priority number 2；
It is calculated in reserved resource block number module described: accounting for the ratio of total number of users according to each priority users number, calculate
Each priority needs reserved resource block number:
Wherein, RB_num_priority is that each priority users reserve number of resources, and num_priority is that corresponding priority is used
Amount mesh；
C (i)={ RB_num_priority (i) }, A=A-C；
Wherein, C (i) is all resource set of blocks for keeping for i priority users, and A is whole resource set of blocks；Described reserved
In resource block module: according to the channel quality information of CQI, by the best resource of preceding RB_num_priority (1) a channel quality
Block identification is that 1 user group of priority reserves resource, after the same method in remaining resource block that channel quality is best
Resource Block identification be priority be 2, and so on；
Wherein, C (i) is all resource set of blocks for keeping for i priority users, and A is whole resource set of blocks.
4. resource allocation system according to claim 3, which is characterized in that high preferential in the resource distribution module
Grade subscriber resource distribution method are as follows: when the user for being 1 to priority distributes resource block, priority is being kept for be 1 resource
In find the opposite resource block for obtaining maximum gain of each user, and allocate it to the user, update transmission speed data, will
Remaining reserved resource according to capacity than it is ascending distribute to all priority be 1 user, one RB of every sub-distribution, until
Reserved resource allocation is complete；Ordinary user's data distribution method are as follows: for all ordinary users, first distribute 1 phase to each user
To channel gain maximum resource block, remaining resource according to capacity than ascending distribution, until being assigned.
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| CN103237351A (en) * | 2012-12-05 | 2013-08-07 | 武汉邮电科学研究院 | LTE (long term evolution) system downlink RB (resource block) resource distribution method based on polling scheduling |
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| CN102083211A (en) * | 2010-03-29 | 2011-06-01 | 大唐移动通信设备有限公司 | Determining method and equipment of uplink control channel resources |
| CN103237351A (en) * | 2012-12-05 | 2013-08-07 | 武汉邮电科学研究院 | LTE (long term evolution) system downlink RB (resource block) resource distribution method based on polling scheduling |
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