CN106850147A - A kind of scheduling method for wireless resource and device for interference coordination system - Google Patents
A kind of scheduling method for wireless resource and device for interference coordination system Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
- H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
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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
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
- H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
- H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information
Abstract
The invention discloses a kind of scheduling method for wireless resource for interference coordination system, Resource Block in base station is divided into interference resource UPRB higher and the relatively low resource PRRB of interference, fed back according to user channel quality base station, using the modulating-coding rule of down link self adaption, assessment spectrum efficiency, the influence degree that user receives interference is described by the interference effect factor；Calculate dispatching priority；Packet information, respectively what PRRB resource of user's distribution UPRB are overstock according to dispatching priority and user.Enable to the user that spectrum efficiency differs greatly on UPRB and PRRB there can be more chances to call PRRB using the present invention, the scope that user is dispatched on different resource is not limited, avoid wasting situation because unreasonable user divides the part resource for bringing, improve the validity of the utilization of resources of PRRP, and UPRB and PRRB resources utilization rate.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of wireless resource scheduling side for interference coordination system
Method and device.
Background technology
In recent years, with the fast development of intelligent terminal, user is presented explosion type for the traffic demand of mobile communication
Increase.In order to cater to the demand of user, following 5G networks are just towards diversification, broadband, synthesization, intelligentized direction hair
Exhibition.LTE-Advanced systems introduce the concept of heterogeneous network (HetNet, Heterogeneous Network), in macrocellular
Dispose low power nodes in coverage to strengthen covering, while the expense of power and lower deployment cost is increased, by frequency
Multiplexed band improves the spectrum efficiency of system, can greatly improve network capacity.The network design of this layer-stepping can strengthen
The covering quality of specific region, improves the performance of edge customer, while reducing the load of macrocellular.However as the intensive of network
Change and variation, the problem of interference is also more serious.For different interference problems, minizone is proposed in 3GPPRel 8 and is done
Coordination (ICIC, Intercell Interference Coordination) is disturbed, it is main to consider multiplexing of the base station from frequency domain resource
On avoid and reduce interference, the technology of representative is soft-frequency reuse.Cross-layer interference in 3GPP Rel 10 for heterogeneous network is asked
Topic, it is proposed that enhanced edition coordinating district interference (eICIC, Enhanced ICIC) technology, introduces ABS (Almost Blank
Subframe concept), is generally disposed in macro base station, for reduce macro base station for cellulor cell range extension (CRE,
Cell Range Expansion) zone user interference.Further improvement is done in 3GPP Rel 11, it is proposed that FeICIC
(Further Ehanced ICIC), introduces the concept of PR-ABS, and it is completely quiet in ABS to reduce macro base station compared to eICIC
The silent loss for bringing.
At present, the scheduling in Long Term Evolution (LTE, Long Term Evolution) system includes：According to dispatching algorithm meter
Calculate the dispatching priority of each user equipment；User is ranked up according to user equipment priority, according to priority orders
It is user resource allocation.When network employs interference coordination technique, the resource of base station will be present disturbs relatively low and higher
Resource, i.e. PRRP and UPRP.It is larger in view of the suffered interference on UPRP of edge customer, it is impossible to effectively to transmit data, because
The main purpose of this interference coordination is exactly to allow on edge customer PRRP dispatch.If not considering the disturbed condition of user, still use
Original priority calculation, can cause that competition priority of the central user on PRRP is larger, but central user exists
The data volume difference that can be transmitted on PRRP and UPRP less, so that UPRP cannot be utilized effectively, is not reached dry simultaneously
Disturb the purpose of coordination.Be also proposed in existing research and divide edge customer and central user, Ran Hou by user channel quality
Two kinds of users are dispatched in different resources respectively, the problem that this scheduling mode is present is that user divides and two class resource capacities
On mismatch may result in certain slot center user PRRP it is not enough, and the UPRP of edge customer also has residue.
The content of the invention
An object of the present invention is to propose a kind of scheduling method for wireless resource for interference coordination system；It is of the invention
The second purpose is to propose a kind of wireless resource scheduling device for interference coordination system；The technical scheme considers user in difference
The difference of the disturbed condition being subject in resource, introduces the interference effect factor so that be disturbed shadow in User Priority calculating
The larger user of sound can have more chances to call the relatively low resource PRRB of interference, while not to dispatching user on different resource
Scope limit, it is to avoid waste situation because unreasonable user divides the part resource that brings, improve the utilization of resources of PRRP
Validity, and UPRB and PRRB resources utilization rate.
An object of the present invention is achieved through the following technical solutions：
Provided by the present invention for the scheduling method for wireless resource of interference coordination system, comprise the following steps：
Base station is fed back according to user channel quality, using the modulating-coding rule of down link self adaption, is calculated user and is existed
Spectrum efficiency on high interference resource UPRB and low interfering resource PRRB；
User is calculated in the tune on high interference resource UPRB and low interfering resource PRRB according to the interference effect factor respectively
Degree priority；
Accumulated in the dispatching priority on high interference resource UPRB and low interfering resource PRRB and user according to the user
Pressure packet information, respectively user's distribution is in high interference resource UPRB and low interfering resource PRRB resources.
Further, on the high interference resource UPRB and low interfering resource PRRB on spectrum efficiency in such a way
Calculate：
When PRRB and URRB are that when being divided from frequency domain, user feeds back it in UPRB in each TTI to serving BS
The broadband CQI of correspondence frequency band frequency band corresponding with PRRB, according to down link self adaption modulating-coding principle in 3GPP agreements, obtains and comments
Estimate spectrum efficiency of the family in URRB and PRRB；
When PRRB and URRB are user feedback ABS and conventional subframe corresponding broadband CQI when being divided from time domain,
According to down link self adaption modulating-coding rule in 3GPP agreements, the frequency spectrum effect in the resource of corresponding PRRB and URRB is obtained
Rate.
Further, the interference effect factor, defines in such a way：
Wherein,For user on high interference resource UPRB corresponding spectrum efficiency；It is user in low interfering resource PRRB
Upper corresponding spectrum efficiency.
Further, the user the dispatching priority on high interference resource UPRB and low interfering resource PRRB according to
Under type is calculated：
When system uses frequency domain interference coordination technique, base station first calculates dispatching priority of the user on UPRB, then
Dispatching priority according to user dispatches user and updates queuing message and throughput information, recycles the information after updating to calculate
Dispatching priority of the user on PRRB, and two times scheduling is carried out to user.
Further, the dispatching priority is specifically calculated in such a way：
Original User Priority is calculated first with original priority computing formula, then using the interference effect factor
With the dispatching priority that original priority calculates user；
Calculate UPRB priority：Inverse using original priority divided by the interference effect factor or with the interference effect factor
It is weighted summation；
After UPRB resources have been dispatched, the queue of user and throughput information are updated, the information weight after by renewal
It is new to calculate original priority, and original priority and the interference effect factor are combined into the new priority of calculating；
When priority of the user on PPRB is calculated, by original priority and interference effect fac-tor, or will be original
Priority and the interference effect factor are weighted summation；
When system uses time domain interference coordination technology, user is calculated in UPRB or PRRB resources according to the interference effect factor
On dispatching priority, it is specific as follows and according to priority scheduling user：
Further, when present sub-frame dispatches UPRB, the priority of calculating using original priority divided by interference effect because
Result sub or that summation is weighted with the inverse of the interference effect factor；If the resource of present sub-frame scheduling belongs to PPRB, in meter
When calculating priority, by original priority and interference effect fac-tor, or by original priority and the carrying out of the interference effect factor
Weighted sum；Comprise the following steps that：
Selection current priority highest user, obtains its data volume to be passed for xbit, and the corresponding frequency of the user
Spectrum efficiency a bit/RB, wherein, if present sub-frame scheduling UPRB, spectrum efficiency should be the spectrum efficiency measured on UPRB；If
Present sub-frame dispatches PPRB, then spectrum efficiency corresponds to the spectrum efficiency measured on PPRB；
The resource quantity of user's request is estimated, if Resource Block quantity is to the maximumIt is individual；Random in Current resource is to be somebody's turn to do
User selectsIndividual Resource Block；Then the user of priority second is selected, is adopted and is distributed resource in a like fashion, by preferential
Level order is followed successively by user resource allocation, until all resources are all distributed or all users are assigned to resource.
The second object of the present invention is achieved through the following technical solutions：
Provided by the present invention for the wireless resource scheduling device of interference coordination system, including spectrum efficiency computing module,
Dispatching priority computing module and scheduler module；
The spectrum efficiency computing module, feeds back, using down link self adaption for base station according to user channel quality
Modulating-coding rule, calculate spectrum efficiency of the user on high interference resource UPRB and low interfering resource PRRB；
The dispatching priority computing module, for calculating user respectively in high interference resource according to the interference effect factor
Dispatching priority on UPRB and low interfering resource PRRB；
The scheduler module, for according to the user in the tune on high interference resource UPRB and low interfering resource PRRB
Degree priority and user overstock packet information, and respectively user's distribution is provided in high interference resource UPRB and low interfering resource PRRB
Source；
The spectrum efficiency computing module, on the high interference resource UPRB and low interfering resource PRRB
Spectrum efficiency is calculated in such a way：
When PRRB and URRB are that when being divided from frequency domain, user feeds back it in UPRB in each TTI to serving BS
The broadband CQI of correspondence frequency band frequency band corresponding with PRRB, according to down link self adaption modulating-coding principle in 3GPP agreements, obtains and comments
Estimate spectrum efficiency of the family in URRB and PRRB；
When PRRB and URRB are user feedback ABS and conventional subframe corresponding broadband CQI when being divided from time domain,
According to down link self adaption modulating-coding rule in 3GPP agreements, the frequency spectrum effect in the resource of corresponding PRRB and URRB is obtained
Rate.
Further, the interference effect factor, defines in such a way：
Wherein,For user on high interference resource UPRB corresponding spectrum efficiency；It is user in low interfering resource
The upper corresponding spectrum efficiencies of PRRB；
The user in the dispatching priority on high interference resource UPRB and low interfering resource PRRB in such a way
Calculate：
When system uses frequency domain interference coordination technique, base station first calculates dispatching priority of the user on UPRB, then
Dispatching priority according to user dispatches user and updates queuing message and throughput information, recycles the information after updating to calculate
Dispatching priority of the user on PRRB, and two times scheduling is carried out to user.
Further, the dispatching priority is specifically calculated in such a way：
Original User Priority is calculated first with original priority computing formula, then using the interference effect factor
With the dispatching priority that original priority calculates user；
Calculate UPRB priority：Inverse using original priority divided by the interference effect factor or with the interference effect factor
It is weighted summation；
After UPRB resources have been dispatched, the queue of user and throughput information are updated, the information weight after by renewal
It is new to calculate original priority, and original priority and the interference effect factor are combined into the new priority of calculating；
When priority of the user on PPRB is calculated, by original priority and interference effect fac-tor, or will be original
Priority and the interference effect factor are weighted summation；
When system uses time domain interference coordination technology, user is calculated in UPRB or PRRB resources according to the interference effect factor
On dispatching priority, it is specific as follows and according to priority scheduling user：
Further, when present sub-frame dispatches UPRB, the priority of calculating using original priority divided by interference effect because
Result sub or that summation is weighted with the inverse of the interference effect factor；If the resource of present sub-frame scheduling belongs to PPRB, in meter
When calculating priority, by original priority and interference effect fac-tor, or by original priority and the carrying out of the interference effect factor
Weighted sum；Comprise the following steps that：
Selection current priority highest user, obtains its data volume to be passed for xbit, and the corresponding frequency of the user
Spectrum efficiency a bit/RB, wherein, if present sub-frame scheduling UPRB, spectrum efficiency should be the spectrum efficiency measured on UPRB；If
Present sub-frame dispatches PPRB, then spectrum efficiency corresponds to the spectrum efficiency measured on PPRB；
The resource quantity of user's request is estimated, if Resource Block quantity is to the maximumIt is individual；Random in Current resource is to be somebody's turn to do
User selectsIndividual Resource Block；Then the user of priority second is selected, is adopted and is distributed resource in a like fashion, by preferential
Level order is followed successively by user resource allocation, until all resources are all distributed or all users are assigned to resource.
By adopting the above-described technical solution, the present invention has the advantage that：
Provided by the present invention for the scheduling method for wireless resource of interference coordination system, when using interference coordination skill in system
During art, the Resource Block in base station will be corresponded to and be divided into interference resource (UPRB, Unprotected Resource higher
Block) and relatively low resource (PRRB, Protect Resource Block) is disturbed, base station is fed back according to user channel quality,
Using the modulating-coding rule of down link self adaption, average spectral efficiency (ase) of the assessment user on UPRB and PRRB, it is considered to use
The difference of spectrum efficiency of the family in both resources, defines the interference effect factor, and the shadow of interference is received for describing user
The degree of sound；Using the described interference effect factor, different formula are respectively adopted and calculate scheduling of the user in this two classes resource
Priority；Dispatching priority and user according to the user on UPRB and PRRB overstock packet information, respectively user
Distribution UPRB is what PRRB resource.The invention also discloses a kind of resource scheduling device.Enabled in UPRB using the present invention and
The user that the upper spectrum efficiencies of PRRB differ greatly can have more chances to call PRRB, not to dispatching user's on different resource
Scope is limited, it is to avoid is wasted situation because unreasonable user divides the part resource for bringing, is improve the utilization of resources of PRRP
Validity, and UPRB and PRRB resources utilization rate.
The method that the present invention is provided considers the spectrum efficiency using user scheduling different resource in interference coordination system, calculates
The influence degree to different user is disturbed in the interference effect factor of user, assessment, and is existed using interference effect factor calculating user
Dispatching priority on different resource, can effectively improve the validity of utilization rate and the PRRB scheduling of overall resource, it is to avoid
The priority of central user competition PRRB is too high, improves the overall spectrum efficiency of system.
Other advantages of the invention, target and feature will be illustrated in the following description to a certain extent, and
And to a certain extent, based on being will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.Target of the invention and other advantages can be realized by following specification and
Obtain.
Brief description of the drawings
Brief description of the drawings of the invention is as follows.
Fig. 1 is the schematic flow sheet of resource regulating method of the present invention；
Fig. 2 is that the frequency domain interference of the embodiment of the present invention one coordinates system schematic；
Fig. 3 is the time domain interference coordination system schematic of the embodiment of the present invention two；
Fig. 4 is the resource scheduling device composition structural representation of the frequency domain interference of embodiment one coordination system in the present invention；
Fig. 5 is the resource scheduling device composition structural representation of the time domain interference coordination system of embodiment two in the present invention；
Fig. 6 is the scheduling of resource schematic flow sheet that frequency domain interference of the present invention coordinates system.
Fig. 7 is the scheduling of resource schematic flow sheet of time domain interference coordination system of the present invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment 1
As illustrated, the resource regulating method that the present embodiment is provided, comprises the following steps：
A, define the interference effect factor, effect be disturbed for weighing user, using user respectively in UPRB and
Channel feedback information on PRRB, assessment user calculates the interference effect factor of user using the spectrum efficiency of UPRB and PRRB；
B, the interference effect factor using user, calculate dispatching priority of the user on UPRB and PRRB respectively.
The dispatching priority of c, the user according on UPRB and PRRB is ranked up to user, with reference to the number of user
It is user resource allocation according to backlog information, it is not necessary to limit which user which user dispatches with PRRB rises on UPRB
Degree.
Spectrum efficiency of the user on UPRB and PRRB is assessed in such a way：
When PRRB and URRB are divided from frequency domain, i.e., network carries out interference coordination (such as using ICIC from frequency domain
Partial frequency multiplexing) technology when, user need each TTI to serving BS feed back its UPRB correspondence frequency band it is corresponding with PRRB
The broadband CQI of frequency band, according to down link self adaption modulating-coding principle in 3GPP agreements, obtains user URRB's and PRRB
Spectrum efficiency.The corresponding CQI of ABS and the corresponding CQI of conventional subframe respectively according to user feedback, reflecting with reference to defined in 3GPP
Firing table, calculates spectrum efficiency.
When PRRB and URRB are divided from time domain, i.e., network is using the ABS (PR-ABS) in eICIC (FeICIC)
When, user needs feedback ABS (PR-ABS) and conventional subframe corresponding broadband CQI, adaptive according to downlink in 3GPP agreements
Modulating-coding rule is answered, the average spectral efficiency (ase) in the resource of corresponding PRRB and URRB is obtained.
Specifically, reporting of user broadband CQI, wherein CQI are divided into 0~15, totally 16 grades, if wherein be fed back to 0,
Channel quality is poor, and base station cannot provide the user service, and CQI is 1~15 15 groups of different modulation coding modes of correspondence, for example
When CQI is 1, the modulation system and coded system that code check is 78/1024 of correspondence 4QAM, then spectrum efficiency is 78*log4/1000
=0.1523bit/cu, is 0.1523*12*2*7 if corresponding be converted into the data volume that a Resource Block can be transmitted
=25.59bit/RB, one of Resource Block correspondence 12 subcarriers and 2 time slots, 7 OFDM symbols of each time slot.
Using the definition of the described interference effect factor, using the broadband CQI of user feedback, according to down link self adaption
The rule of modulating-coding obtains user and corresponding spectrum efficiency is distinguished in both resourcesWithThe interference effect factor is defined
ForThe interference effect factor of each user, the wherein interference effect factor is bigger, shows that user is interfered to it
The influence of channel capacity is bigger.
User is calculated using the interference effect factor of each UE obtain the corresponding priority of the UE, user in UPRB and PRRB
The priority for dispatching PRRB is directly proportional to the interference effect factor, is inversely proportional with the interference effect factor during scheduling UPRB.
The device of the scheduling of resource of the present embodiment, the device includes：Interference effect factor computing module, priority calculate mould
Block 1 and 2, scheduler module 1 and 2；Wherein：
A, when system uses frequency domain interference coordination approach, base station in any subframe scheduling, be required for scheduling
UPRB and PRRB resources, then the functions and job order of the device are as follows：
Interference effect factor computing module, for the definition using the interference effect factor, calculates present sub-frame scheduling queue
The interference effect factor of middle user, and the interference effect factor of each user is sent to priority computation module；
Priority computation module 1, for calculating dispatching priority of the user on UPRB using the interference effect factor.
Scheduler module 1, for being user's distribution UPRB using the user priority information obtained in priority computation module 1
Resource, while updating the queuing message of user.
Priority computation module 2, the Subscriber Queue information after being updated for the utilization interference effect factor and scheduler module 1,
The scheduling for calculating user's distribution PRRB resources has first level.
Scheduler module 2, for being user's distribution using the user priority information obtained in priority computation module 2
PRRB resources.
B, when system uses time domain interference coordination method, base station only needed in any subframe scheduling, all scheduling
One kind of UPRB and PRRB resources, then the functions and job order of the device are as follows：
Interference effect factor computing module, calculates the interference effect factor of user and sends, if base station is in present sub-frame pair
The resource answered belongs to UPRB, then the interference effect factor is sent into priority computation module 1, is otherwise sent to priority and calculates mould
Block 2；
Priority computation module 1 (or 2), calculates dispatching priority of the user on UPRB or (PRRB) and is sent to scheduling
Module 1 (or 2).
Scheduler module 1 (or 2), according to the User Priority obtained from corresponding priority computation module, with reference to user's
Type of service and data backlog information are user resource allocation.
Base station first calculates dispatching priority of the user on UPRB, and then the dispatching priority according to user dispatches user simultaneously
Queuing message and throughput information are updated, recycles the information after updating to calculate dispatching priority of the user on PRRB, and it is right
User carries out two times scheduling；
Specifically, original User Priority is calculated first with original priority computing formula, then using interference
Factor of influence and original priority calculate the dispatching priority of user.
Depending on the calculation of original priority is by actual conditions, according to the QoS demand of business, the scheduling of different business is excellent
First level calculation is different, the calculation of the interference effect factor and original priority also by actual conditions depending on.
When priority is calculated can be original priority divided by the interference effect factor or and interference effect for UPRB
The inverse of the factor is weighted summation etc..
After UPRB resources have been dispatched, the queue of user and throughput information can be updated, the letter after by renewal
Breath recalculates original priority, and original priority and the interference effect factor are combined into the new priority of calculating, is calculating
During priority of the user on PPRB, can be by original priority and interference effect fac-tor, it is also possible to by original priority
Summation is weighted with the interference effect factor.
When system uses time domain interference coordination technology, user is calculated in UPRB or PRRB resources according to the interference effect factor
On dispatching priority, and according to priority scheduling user.
Specifically, when present sub-frame dispatches UPRB, the priority of calculating can be original priority divided by interference effect
The factor or it is weighted result of summation etc. with the inverse of the interference effect factor；If the resource of present sub-frame scheduling belongs to
PPRB, when priority is calculated, can be by original priority and interference effect fac-tor, it is also possible to by original priority and dry
That disturbs factor of influence is weighted summation.
Specifically, the conventional method of the scheduling of user may comprise steps of：
Selection current priority highest user, obtains its data volume to be passed for xbit, and the corresponding frequency of the user
Spectrum efficiency a bit/RB, wherein, if present sub-frame scheduling UPRB, spectrum efficiency should be the spectrum efficiency measured on UPRB, if
Present sub-frame dispatches PPRB, then spectrum efficiency corresponds to the spectrum efficiency measured on PPRB；
The resource quantity of user's request is estimated, if Resource Block quantity is to the maximumIt is individual.Can be random in Current resource
For the user selectsIndividual Resource Block；
Then the user of priority second is selected, is adopted and is distributed resource in a like fashion, so according to priority sequentially successively
It is user resource allocation, until all resources are all distributed or all users have been assigned to enough resources.
Embodiment 2
The unlimited resources dispatching method for interference coordination system that the present embodiment is provided, comprises the following steps：
Using user, user is disturbing stronger resource (UPRB) and the weaker resource of interference in interference coordination system
(PRRB) channel feedback information on, according to the criterion of down link self adaption, mapping obtains user respectively in both resources
On spectrum efficiency, it is the interference effect factor of user to define the ratio between spectrum efficiency in PRRB upper spectrum efficiency and UPRB, use
In the influence degree that measurement user is disturbed.Using the interference effect factor, scheduling of the user on UPRB and PRRB is calculated respectively
Priority.
Specifically, when system uses frequency domain interference coordination technique, base station needs first to calculate scheduling of the user on UPRB
Priority, the then dispatching priority scheduling according to user and updates the information such as queuing message and handling capacity at user, recycles more
Information after new calculates dispatching priority of the user on PRRB, and carries out two times scheduling to user；When system is dry using time domain
When disturbing coordination technique：UPRB and PRRB distinguishes on different sub frames, therefore corresponding each subframe, and base station is only needed to according to described
The interference effect factor, calculate dispatching priority of the user in a kind of resources of UPRB or PRRB, and use according to priority scheduling
Family.
Specifically, the calculating of dispatching priority, specific for each in the scheduling queue for utilizing the present sub-frame one by one
The original priority of individual UE, the interference effect factor with the UE is calculated, and obtains the corresponding priority of the UE.Preferential
After the interference effect factor being introduced in level computing formula, if the interference effect factor of user is larger, its scheduling of correspondence on UPRB
Priority can relative reduction, the relative lifting of dispatching priority meeting on PRRB.
The device of the scheduling of resource that the present embodiment is provided, including：Interference effect factor computing module, priority calculate mould
Block, scheduler module；Wherein：
Interference effect factor computing module, for the channel quality feedback information according to user, according to the rigid factor of interference
Definition, calculate the interference effect factor of user, and the corresponding interference effect factor of user is sent to priority computation module.
Priority computation module, for using from interference effect factor computing module send described in each user interference
The original priority of factor of influence combination user, calculates dispatching priority of the user on UPRB and PRRB, and be sent to correspondence
Scheduler module.In frequency domain interference coordination system, base station needs two priority computation modules, is calculated respectively in each subframe
Dispatching priority of the user on UPRB and PRRB；In time domain interference coordination system, base station only needs to a priority and calculates
Module, in the type according to subframe, the different priority computational methods of selective use, user is on UPRB or PRRB for calculating
Dispatching priority.
Scheduler module, the precedence information for the user sent according to correspondence priority computation module is provided for user distributes
Source.In frequency domain interference coordination system, base station needs two scheduler modules, and basis is obtained from different priority computation modules respectively
The User Priority for taking, performs the scheduling of resource of UPRB and PRRB.In time domain interference coordination system, base station only needs to a tune
Degree module, is scheduled according to the dispatching priority of users obtained from priority computation module in different subframes to user.
Embodiment 3
Fig. 2 is that frequency domain interference used in the present invention coordinates system schematic, specifically, base station resource is drawn from frequency
Different band resources corresponds to different reusing degrees respectively, and wherein reusing degree resource higher belongs to UPRB, the low money of reusing degree
Source belongs to PRRB.
The time domain interference coordination system schematic that Fig. 3 is used by the present embodiment, specifically, when system uses eICIC skills
When art is macro base station configuration ABS subframes, the resource category that the low power nodes (LPN) in macro base station coverage are dispatched in ABS
In PRRB, the resource of conventional subframe scheduling belongs to UPRB；
When system is macro base station configuration PR-ABS using FeICIC, the LPN in macro base station coverage is in PR-ABS
The resource of scheduling belongs to PRRB, and UPRB, the money that opposite macro base station is dispatched in PR-ABS are belonged in the resource of conventional subframe scheduling
Source interference belongs to more by force UPRB, and the resource in conventional subframe scheduling belongs to PRRB.
As shown in fig. 6, it is applied to the resource regulating method that frequency domain interference coordinates system in the present embodiment, including following step
Suddenly：
Step 600, using the CQI of the UPRB and PRRB of user feedback, criterion (such as table according to down link self adaption
1), mapping obtains corresponding MCS, obtains spectrum efficiency of the user on UPRB and PRRBWithUnit is bit/cu.
Table 1
Step 601, interference effect factor computing module is imitated using the average frequency spectrum on PRRB and URRB of each user
RateWithCalculate the interference effect factor of userAnd the interference effect factor that will be calculated is sent to preferentially
Level computing module.
Step 602, priority computation module 1, according to the user's interference effect obtained from interference effect factor calculating unit
The factor, calculates dispatching priority of the user on UPRB.
Specifically, original User Priority is calculated first with original priority computing formula, then using interference
Factor of influence and original priority calculate the dispatching priority of user.
Step 603, the dispatching priority according to user on UPRB, user is ranked up, and gives user's distribution successively
Resource；
Specifically, depending on the calculation of original priority is by actual conditions, according to the QoS demand of business, different business
Dispatching priority calculation it is different, the calculation of the interference effect factor and original priority also by actual conditions depending on,
Can be that original priority is weighted summation etc. divided by the interference effect factor or with the inverse of the interference effect factor.
Step 604, dispatching priority of the scheduler module 1 according to user on UPRB carries out resource allocation to user successively,
Update the service queue information of user.
Specifically, being that any user is distributed after a UPRB Resource Block, it is necessary to assess user using this during scheduling
The data volume that Resource Block can send, and the volume of transmitted data that distributed resource is brought, one are subtracted from data to be sent
Denier user is assigned with enough resources, by from the competition for exiting surplus resources.
Step 605, according to Subscriber Queue information and Mean Speed information after renewal, recalculates original of the user in PRRB
Beginning dispatching priority, then calculates the dispatching priority of user using the interference effect factor and original priority.
Specifically, depending on the calculation of original priority is by actual conditions, according to the QoS demand of business, different business
Dispatching priority calculation it is different, the calculation of the interference effect factor and original priority also by actual conditions depending on,
Can be that original priority is weighted summation etc. with interference effect fac-tor or with the interference effect factor.
Step 606, dispatching priority of the scheduler module according to user on PRRB carries out resource allocation to user successively.
Specifically, being that any user is distributed after a PRRB Resource Block, it is necessary to assess user using this during scheduling
The data volume that Resource Block can send, and the volume of transmitted data that distributed resource is brought, one are subtracted from data to be sent
Denier user is assigned with enough resources, by from the competition for exiting surplus resources.
Resource allocation methods described here are existing technology, only do simple description.
Suitable for the resource regulating method of time domain interference coordination system in the present embodiment, as shown in fig. 7, comprises following step
Suddenly：
Step 700, the CQI information fed back in the subframe of correspondence UPRB and the subframe of PRRB using user feedback, foundation
The criterion (such as table 1) of down link self adaption, mapping obtains corresponding MCS, and user is on UPRB and PRRBZIAU for acquisition
Spectrum efficiencyWithUnit is bit/cu.
Step 701, interference effect factor computing module is imitated using the average frequency spectrum on PRRB and URRB of each user
RateWithCalculate the interference effect factor of userAnd the interference effect factor that will be calculated is sent to preferentially
Level computing module.
Step 702, resource type judge module judges that the resource type of present sub-frame scheduling is UPRB or PRRB.
Specifically, for LPN, if present sub-frame is ABS or PR-ABS, corresponding scheduling resource belongs to PRRB, otherwise for
UPRB；For macro base station, only when there is PR-ABS configurations, resource just has dividing for UPRB and PRRB, if present sub-frame is
Then scheduling resource belongs to UPRB to PR-ABS, otherwise belongs to PRRB.
Step 703, priority computation module, according to the user's interference effect obtained from interference effect factor Computing Meta because
Son, and result is obtained from resource type judging unit, specific priority calculation is selected, calculate present sub-frame user's
Priority.
Specifically, original User Priority is calculated first with original priority computing formula, according to the QoS of business
Demand, the dispatching priority calculation of different business is different, and User Priority is calculated then in conjunction with the interference effect factor.
Specifically, the calculation selection of the interference effect factor and original priority is relevant with resource type.If current son
Frame correspondence scheduling resource belong to UPRB, then by original priority divided by the interference effect factor or with the interference effect factor fall
Number be weighted and etc.；If the resource of present sub-frame correspondence scheduling belongs to PRRB, by original priority and interference effect because
Son is multiplied, or the weighted sum for asking original priority and the interference effect factor.
Specifically, consider interference priority calculation because depending on actual conditions, it is necessary to the criterion for following is：
Introduce after the interference effect factor, disturbing the relative priority that the larger user of factor of influence dispatches on PRRB will carry
Height, conversely the dispatching priority on UPRB will reduction.
Step 704, the type of service according to user and the dispatching priority from priority computation module acquisition, are user
Distribution resource.
Specifically, during scheduling, be any user distribution present sub-frame a Resource Block after, it is necessary to assess user
The data volume that can be sent using the Resource Block, and the data transfer that distributed resource is brought is subtracted from data to be sent
Amount, once user is assigned with enough resources, by from the competition for exiting surplus resources.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to skill of the invention
Art scheme is modified or equivalent, and without deviating from the objective and scope of the technical program, it all should cover in the present invention
Protection domain in the middle of.
Claims (10)
1. a kind of scheduling method for wireless resource for interference coordination system, it is characterised in that：Comprise the following steps：
Base station is fed back according to user channel quality, using the modulating-coding rule of down link self adaption, calculates user in high level cadre
Disturb the spectrum efficiency on resource UPRB and low interfering resource PRRB；
User is calculated according to the interference effect factor respectively excellent in the scheduling on high interference resource UPRB and low interfering resource PRRB
First level；
According to the user in the dispatching priority on high interference resource UPRB and low interfering resource PRRB and user's backlog
According to package informatin, respectively user's distribution is in high interference resource UPRB and low interfering resource PRRB resources.
2. the scheduling method for wireless resource of interference coordination system is used for as claimed in claim 1, it is characterised in that：The high level cadre
The spectrum efficiency disturbed on resource UPRB and low interfering resource PRRB is calculated in such a way：
When PRRB and URRB are that when being divided from frequency domain, user feeds back it in UPRB correspondences in each TTI to serving BS
The broadband CQI of frequency band frequency band corresponding with PRRB, according to down link self adaption modulating-coding principle in 3GPP agreements, obtains assessment family
In the spectrum efficiency of URRB and PRRB；
When PRRB and URRB are user feedback ABS and conventional subframe corresponding broadband CQI when being divided from time domain, according to
Down link self adaption modulating-coding rule, obtains the spectrum efficiency in the resource of corresponding PRRB and URRB in 3GPP agreements.
3. the scheduling method for wireless resource of interference coordination system is used for as claimed in claim 1, it is characterised in that：The interference
Factor of influence IIFu, define in such a way：
Wherein,For user on high interference resource UPRB corresponding spectrum efficiency；For user is right on low interfering resource PRRB
The spectrum efficiency answered.
4. the scheduling method for wireless resource of interference coordination system is used for as claimed in claim 1, it is characterised in that：The user
Calculated in such a way in the dispatching priority on high interference resource UPRB and low interfering resource PRRB：
When system uses frequency domain interference coordination technique, base station first calculates dispatching priority of the user on UPRB, then basis
The dispatching priority scheduling user of user simultaneously updates queuing message and throughput information, recycles the information after updating to calculate user
Dispatching priority on PRRB, and two times scheduling is carried out to user.
5. the scheduling method for wireless resource of interference coordination system is used for as claimed in claim 1, it is characterised in that：The scheduling
Priority is specifically calculated in such a way：
Original User Priority is calculated first with original priority computing formula, then using the interference effect factor and original
Beginning priority calculates the dispatching priority of user；
Calculate UPRB priority：Carried out divided by the interference effect factor or with the inverse of the interference effect factor using original priority
Weighted sum；
After UPRB resources have been dispatched, the queue of user and throughput information are updated, and the information after by renewal is counted again
Original priority is calculated, and original priority and the interference effect factor are combined into the new priority of calculating；
When priority of the user on PPRB is calculated, by original priority and interference effect fac-tor, or by original priority
Level and the interference effect factor are weighted summation；
When system uses time domain interference coordination technology, according to interference effect factor calculating user in UPRB or PRRB resources
Dispatching priority, and according to priority scheduling user, it is specific as follows：
6. the scheduling method for wireless resource of interference coordination system is used for as claimed in claim 1, it is characterised in that：In current son
During frame scheduling UPRB, the priority of calculating uses inverse of the original priority divided by the interference effect factor or with the interference effect factor
It is weighted the result of summation；If present sub-frame scheduling resource belong to PPRB, calculate priority when, by original priority with
Interference effect fac-tor, or original priority and the interference effect factor are weighted summation；Comprise the following steps that：
Selection current priority highest user, obtains its data volume to be passed for xbit, and the corresponding frequency spectrum effect of the user
Rate a bit/RB, wherein, if present sub-frame scheduling UPRB, spectrum efficiency should be the spectrum efficiency measured on UPRB；If current
Subframe scheduling PPRB, then spectrum efficiency correspond to the spectrum efficiency measured on PPRB；
The resource quantity of user's request is estimated, if Resource Block quantity is to the maximumIt is individual；It is at random the user in Current resource
SelectionIndividual Resource Block；Then the user of priority second is selected, is adopted and is distributed resource in a like fashion, it is according to priority suitable
Sequence is followed successively by user resource allocation, until all resources are all distributed or all users are assigned to resource；
Wherein,Represent.
7. a kind of wireless resource scheduling device for interference coordination system, it is characterised in that：Including spectrum efficiency computing module,
Dispatching priority computing module and scheduler module；
The spectrum efficiency computing module, feeds back, using the tune of down link self adaption for base station according to user channel quality
Coding rule processed, calculates spectrum efficiency of the user on high interference resource UPRB and low interfering resource PRRB；
The dispatching priority computing module, for calculating user respectively in high interference resource UPRB according to the interference effect factor
With the dispatching priority on low interfering resource PRRB；
The scheduler module, for excellent in the scheduling on high interference resource UPRB and low interfering resource PRRB according to the user
First level and user overstock packet information, and respectively user's distribution is in high interference resource UPRB and low interfering resource PRRB resources；
The spectrum efficiency computing module, for the frequency spectrum on the high interference resource UPRB and low interfering resource PRRB
Efficiency is calculated in such a way：
When PRRB and URRB are that when being divided from frequency domain, user feeds back it in UPRB correspondences in each TTI to serving BS
The broadband CQI of frequency band frequency band corresponding with PRRB, according to down link self adaption modulating-coding principle in 3GPP agreements, obtains assessment family
In the spectrum efficiency of URRB and PRRB；
When PRRB and URRB are user feedback ABS and conventional subframe corresponding broadband CQI when being divided from time domain, according to
Down link self adaption modulating-coding rule, obtains the spectrum efficiency in the resource of corresponding PRRB and URRB in 3GPP agreements.
8. the wireless resource scheduling device of interference coordination system is used for as claimed in claim 7, it is characterised in that：The interference
Factor of influence IIFu, define in such a way：
Wherein,For user on high interference resource UPRB corresponding spectrum efficiency；For user is right on low interfering resource PRRB
The spectrum efficiency answered；
The user calculates in such a way in the dispatching priority on high interference resource UPRB and low interfering resource PRRB：
When system uses frequency domain interference coordination technique, base station first calculates dispatching priority of the user on UPRB, then basis
The dispatching priority scheduling user of user simultaneously updates queuing message and throughput information, recycles the information after updating to calculate user
Dispatching priority on PRRB, and two times scheduling is carried out to user.
9. the wireless resource scheduling device of interference coordination system is used for as claimed in claim 7, it is characterised in that：The scheduling
Priority is specifically calculated in such a way：
Original User Priority is calculated first with original priority computing formula, then using the interference effect factor and original
Beginning priority calculates the dispatching priority of user；
Calculate UPRB priority：Carried out divided by the interference effect factor or with the inverse of the interference effect factor using original priority
Weighted sum；
After UPRB resources have been dispatched, the queue of user and throughput information are updated, and the information after by renewal is counted again
Original priority is calculated, and original priority and the interference effect factor are combined into the new priority of calculating；
When priority of the user on PPRB is calculated, by original priority and interference effect fac-tor, or by original priority
Level and the interference effect factor are weighted summation；
When system uses time domain interference coordination technology, according to interference effect factor calculating user in UPRB or PRRB resources
Dispatching priority, and according to priority scheduling user, it is specific as follows：
10. the wireless resource scheduling device of interference coordination system is used for as claimed in claim 1, it is characterised in that：Current
During subframe scheduling UPRB, the priority of calculating is fallen using original priority divided by the interference effect factor or with the interference effect factor
Number is weighted the result of summation；If the resource of present sub-frame scheduling belongs to PPRB, when priority is calculated, by original priority
With interference effect fac-tor, or original priority and the interference effect factor are weighted summation；Comprise the following steps that：
Selection current priority highest user, obtains its data volume to be passed for xbit, and the corresponding frequency spectrum effect of the user
Rate a bit/RB, wherein, if present sub-frame scheduling UPRB, spectrum efficiency should be the spectrum efficiency measured on UPRB；If current
Subframe scheduling PPRB, then spectrum efficiency correspond to the spectrum efficiency measured on PPRB；
The resource quantity of user's request is estimated, if Resource Block quantity is to the maximumIt is individual；It is at random the user in Current resource
SelectionIndividual Resource Block；Then the user of priority second is selected, is adopted and is distributed resource in a like fashion, it is according to priority suitable
Sequence is followed successively by user resource allocation, until all resources are all distributed or all users are assigned to resource.
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