CN101562890A - Admission control method for determining priority of resource allocation and related device - Google Patents

Admission control method for determining priority of resource allocation and related device Download PDF

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Publication number
CN101562890A
CN101562890A CNA2008101044459A CN200810104445A CN101562890A CN 101562890 A CN101562890 A CN 101562890A CN A2008101044459 A CNA2008101044459 A CN A2008101044459A CN 200810104445 A CN200810104445 A CN 200810104445A CN 101562890 A CN101562890 A CN 101562890A
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real time
time business
resource
value
business
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CN101562890B (en
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于明亮
王亚峰
杨大成
沈晓冬
李男
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China Mobile Communications Group Co Ltd
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China Mobile Communications Group Co Ltd
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Abstract

The invention discloses an admission control method. The method comprises the following steps: receiving a request message for requesting admission of a service in the current admission control period; judging the type of service for admission which is requested by the request message; admitting non-real-time service of the request in case the type of the requested service for admission is of non-real-time service; determining admission priority of the requested real-time service in case the type of the requested service for admission is of real-time service; judging whether real-time service resources are available for the request based on the determined admission priority; and admitting the requested real-time service when a judgment result is that the real-time service resources are available for the request. Correspondingly, the invention further discloses an admission controller, a method for allocating resources for a real-time service and a device thereof, as well as a method for determining priority of resource allocation and a device thereof. The proposal can help meet various new requirements brought forward by next generation wireless communication system for admission control.

Description

Admit method, the relevant device of control and definite priority of resource allocation
Technical field
The present invention relates to communication technical field, relate in particular to a kind of acceptance controlling method and admit the method for controller, a kind of definite priority of resource allocation and device and a kind ofly be real time business method of allocating resources and device thereof.
Background technology
RRM (RRM, Radio Resource Management) subsystem is a very important module in the RNS, and Call Admission Control (CAC, Call Admission Control) be the important component part of RRM, Call Admission Control module (CACM) can be according to the current Radio Resource in sub-district and the service quality (QoS of load condition and calling, Quality of Service), according to certain algorithm, the issuable load recruitment of new call request is predicted, according to certain access criterion, determine that new calling is allowed to access or is rejected then.The purpose of admitting control is traffic overload to occur and guarantee calling out under the prerequisite of QoS at anti-locking system, guarantees and improve the capacity of system as far as possible.
Based on OFDM (OFDM, Orthogonal Frequency Division Multiplex) the next generation wireless communication system of technology, every technology in the existing second generation (2G) and the third generation (3G) wireless communication system has all been proposed brand-new challenge, since based on the next generation wireless communication system of OFDM technology need support the mobile subscriber high-speed mobile, need satisfy the qos requirement of multiple business, and need realize the seamless switching of user between diverse network etc., therefore, accordingly to admitting control technology also to propose many brand-new requirements.
Existing admittance controlling schemes based on the 2G/3G wireless communication system, and it is as follows that it is applied to the problem that exists in the next generation wireless communication system:
Scheme 1, the admittance controlling schemes that keeps based on channel, keep a part of resource promptly in advance the switching user, this scheme has been considered the performance of class of call, but does not consider the different QoS requirement of multiple business in the wireless system of future generation and the qos requirement of package level;
Scheme 2, based on the admittance controlling schemes that local channel keeps, promptly according to the Radio Resource operating position, whether be access in certain probability decision call request user, this scheme can not accurately be judged the overload situations of system, can not guarantee the QoS performance of package level;
Scheme 3, admit controlling schemes based on the collaboration type of estimating, the situation information of promptly utilizing the neighbor cell resource to use, the reserve part Radio Resource is given and is switched the user, and shortcoming is identical with scheme 1, and overhead is bigger;
Scheme 4, based on the admittance controlling schemes of user mobile information, promptly utilize user's mobile message, keep Radio Resource for switching the user, but this scheme is in order to obtain user's mobile message, cause bigger system resource overhead, in the next generation wireless communication system, be difficult to use this scheme;
In sum, existing admittance controlling schemes system can't satisfy the next generation wireless communication system based on the OFDM technology, to the every brand-new requirement of admitting control to propose, for example, can't distinguish vertical switching user (neighbor cell beyond promptly from this sub-district switches the user who comes) and initiate the new requesting users (being that requesting users is newly initiated to insert in this sub-district) that inserts; Can't support the multiple business type and satisfy the qos requirement of different service types; The service quality of continuation assurance system can not switched and multiple business type when bringing interim overload; Can not satisfy the qos requirement of package level and class of call etc., thereby can't under the prerequisite that guarantees service quality, guarantee and improve the capacity of system.
Summary of the invention
The invention provides a kind of acceptance controlling method and admit controller, so that when interim overload takes place, still can guarantee the service quality of system.
The embodiment of the invention provides a kind of acceptance controlling method, comprising: the admittance control period current, receive the request message that is used to ask admission service; Judge the type of described request message request admission service; If the type of request admission service is a non-real-time service, then admit the non-real-time service of this request; If the type of request admission service is a real time business, then determine the admittance priority of the real time business of this request; And, judge whether to distribute to the resource of the real time business of this request based on described definite admittance priority; In judged result is when the resource of the real time business that can distribute to this request is arranged, to admit the real time business of this request.
The embodiment of the invention provides a kind of admittance controller, comprising: receiving element is used for receiving the request message that is used to ask admission service in the current admittance control period; First judging unit is used to judge the request message that receiving element receives, the type of request admission service; Non-real-time service is admitted the unit, is used for admitting the non-real-time service of this request when the judged result of first judging unit is non-real-time service for the type of asking admission service; Determining unit is used for determining the admittance priority of the real time business of this request when the judged result of first judging unit is real time business for the type of asking admission service; Second judging unit is used for the admittance priority determined based on determining unit, judges whether to distribute to the resource of the real time business of this request; Real time business is admitted the unit, and the judged result that is used at second judging unit is when the resource of the real time business that can distribute to this request is arranged, to admit the real time business of this request.
Acceptance controlling method that the embodiment of the invention proposes and admittance controller by when non-real-time service is admitted in request, are admitted this non-real-time service; When real time business is admitted in request, admittance priority based on this real time business, whether judge currently has resource can distribute to this real time business, if any, admit this real time business, the feasible connection that has kept some non real-times user is transshipped when taking place thereby avoid interim, poor system performance, even be in the situation of overload for a long time.
The invention provides a kind of be real time business method of allocating resources and device thereof, so that when interim overload takes place, still can guarantee the service quality of system.
The invention provides a kind ofly for the real time business method of allocating resources, comprising: obtain the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value; Based on the total resources value and the described ratio that obtains of system, determine the current admittance control period and can distribute to the resource total value of all real time business.
What the embodiment of the invention proposed be the device of real time business Resources allocation, comprising: acquiring unit is used to obtain current admittance and controls the ratio that resource total value that the period can distribute to all real time business accounts for system's total resources value; Determining unit is used for the ratio that total resources value and acquiring unit based on system obtain, and determines the current admittance control period and can distribute to the resource total value of all real time business.
What the embodiment of the invention proposed is real time business method of allocating resources and device thereof, total resources value by system, and the resource total value of obtaining of distributing to all real time business accounts for the ratio of system's total resources value, obtaining the current admittance control period can distribute to the resource total value of all real time business, thereby when having avoided that whole system resource values distributed to real time business, cause when interim overload takes place, poor system performance, even be in the situation of overload for a long time.
The invention provides a kind of method and device thereof of definite priority of resource allocation, with enable to channel condition preferably real time business with bigger transmission opportunity.
The embodiment of the invention provides a kind of method of definite priority of resource allocation, comprising: obtain and admit the object transmission time delay value of real time business in the current resource allocation period; Judge that this real time business is at the actual transmissions time delay value of current resource allocation period, whether greater than the described object transmission time delay value that obtains; When being,, determine the adjustment parameter of the priority of resource allocation of adjusting this real time business in judged result based on the actual transmissions time delay value and the object transmission time delay value of described real time business; Based on the described adjustment parameter of determining, adjust the priority of resource allocation of this real time business.
The embodiment of the invention provides a kind of device of definite priority of resource allocation, comprising: acquiring unit is used to obtain and has admitted the object transmission time delay value of real time business in the current resource allocation period; Whether judging unit is used to judge this real time business at the actual transmissions time delay value of current resource allocation period, the object transmission time delay value that obtains greater than acquiring unit; Determining unit is used in the judged result of judging unit based on the actual transmissions time delay value and the object transmission time delay value of described real time business, determining the adjustment parameter of the priority of resource allocation of adjusting this real time business when being; Adjustment unit is used for the adjustment parameter determined based on determining unit, adjusts the priority of resource allocation of this real time business.
The method and the device thereof of definite priority of resource allocation that the embodiment of the invention proposes, by at the actual transmissions time delay value of real time business during greater than the object transmission time delay value, determine the adjustment parameter of the priority of resource allocation of this real time business of adjustment, and based on the described adjustment parameter of determining, adjust the priority of resource allocation of this real time business, make can to channel condition preferably real time business with bigger transmission opportunity.
Description of drawings
Fig. 1 is the schematic diagram of the two-stage acceptance control system of embodiment of the invention proposition;
Fig. 2 a is the schematic flow sheet of the acceptance controlling method of embodiment of the invention proposition;
Fig. 2 b be the embodiment of the invention propose be real time business method of allocating resources schematic flow sheet;
Fig. 2 c is the schematic flow sheet of the acceptance controlling method of the embodiment of the invention one proposition;
Fig. 3 a is the method flow schematic diagram of definite priority of resource allocation of embodiment of the invention proposition;
Fig. 3 b is the schematic flow sheet that obtains the object transmission time delay value that the embodiment of the invention two proposes;
Fig. 4 is the structural representation of the admittance controller of embodiment of the invention proposition;
Fig. 5 is the apparatus structure schematic diagram of real time business Resources allocation for embodiment of the invention proposition;
Fig. 6 is the apparatus structure schematic diagram of definite priority of resource allocation of embodiment of the invention proposition.
Embodiment
The admittance controlling schemes that the embodiment of the invention proposes is: when non-real-time service arrives, unconditionally admit this business; When real time business arrives, judged whether that resource can distribute to this real time business, for sometimes, admit this real time business in judged result.
What the embodiment of the invention proposed for the scheme of real time business Resources allocation is: according to certain ratio, tell the resource that partly can distribute to real time business from system's total resources.
The scheme of definite priority of resource allocation that the embodiment of the invention proposes is: according to the actual transmissions time delay value of real time business and the magnitude relationship between the object transmission time delay value, determine the adjustment parameter of the priority of resource allocation of adjusting this real time business, adjust parameter based on this, adjust the priority of resource allocation of this real time business.
Below in conjunction with Figure of description the specific embodiment of the present invention is described.
Fig. 1 is the schematic diagram of the two-stage acceptance control system of embodiment of the invention proposition, so-called two-stage is admitted control to be meant and is admitted controller 11 and resource allocator 12 collaborative works, consider the QoS of class of call and package level, and admit the scheme of control and resource allocation process.Basic workflow is: when receiving the request message of the request admission service that user k sends, admit controller 11 to judge whether it allows to be admitted, user (for example user in figure 1, user 2...... user the N admitted) Resources allocation of resource allocator 12 for allowing to be admitted, and will give in the QoS feedback information that terminal is measured and admit controller 11 and resource allocator 12, thereby realized brand-new two-stage admittance control.
Introduce the admittance controlling schemes that the embodiment of the invention proposes below in detail, shown in Fig. 2 a, concrete process description is as follows:
Step 201: the admittance control period current, receive the request message that is used to ask admission service;
Step 202: the type of judging described request message request admission service;
Step 203:, then admit the non-real-time service of this request if the type of request admission service is a non-real-time service; Promptly when non-real-time service arrives, because this kind business is insensitive to time delay, so unconditional this non-real-time service of admitting;
Step 204:, then determine the admittance priority of the real time business of this request if the type of request admission service is a real time business;
The method of definite admittance priority has multiple, introduces two kinds of typical definite schemes below:
Scheme one: not with real time business according to being the new real time business of initiating in this sub-district, or the real time business of coming, the scheme of distinguishing are switched in other sub-district beyond from this sub-district;
According to the time that receives each request message by the order after arriving first, determine each real time business admittance priority from high to low that described each request message requests is admitted;
Scheme two: according to being the new real time business of initiating in this sub-district, or the real time business of coming, the scheme of distinguishing are switched in other sub-district beyond from this sub-district with real time business;
The admittance priority of each real time business that comes is switched in sub-district beyond determining from this sub-district, all is higher than the admittance priority of new each real time business of initiating in this sub-district;
According to the time that receives each request message by the order after arriving first, determine that described each request message requests admits from this sub-district beyond the sub-district switch each real time business admittance priority from high to low of coming;
According to the time that receives each request message by the order after arriving first, determine new each real time business admittance priority from high to low initiated in this sub-district that described each request message requests is admitted.
Step 205:, judge whether to distribute to the resource of the real time business of this request based on described definite admittance priority;
Step 206: in judged result is when the resource of the real time business that can distribute to this request is arranged, to admit the real time business of this request;
Step 207: in judged result is that cache request is admitted the request message of this real time business when not having to distribute to the resource of real time business of this request;
Step 208: in follow-up official hour,, judge whether to distribute to the resource of the real time business of this request based on the admittance priority of the real time business of this request of determining;
Step 209: for sometimes, admit the real time business of this request in judged result, and delete the request message of described buffer memory;
Step 210: when not having, delete the request message of described buffer memory in judged result.
The admittance priority based on the real time business of determining of carrying out in above-mentioned steps 205 and step 208 judges whether to distribute to the process of resource of the real time business of this request, specifically comprises:
Obtain the resource total value that the current admittance control period can distribute to all real time business;
Admittance priority at the real time business of this request of determining, when being higher than the admittance priority of all unaccepted each real time business, judge the shared resource value of having been admitted of each real time business, add the required resource value sum that takies of real time business of this request, whether be not more than the described resource total value of obtaining;
If then judge the resource of the real time business that can distribute to this request;
If not, then judge the resource of the real time business that does not have to distribute to this request.
Highlight the described process that the current admittance control period can distribute to the resource total value of real time business of obtaining below, promptly introduce and be the process of real time business Resources allocation, Fig. 2 b be the embodiment of the invention propose be real time business method of allocating resources schematic flow sheet, concrete process description is as follows:
Step 21: obtain the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value;
The described process of obtaining can but be not limited to adopt following flow process:
Whether the packet loss of the real time business that judgement was admitted in the last admittance control period of current admittance control period is greater than default target packet loss;
If, then the resource total value that can distribute to all real time business based on the last admittance control period accounts for the ratio of system's total resources value, utilize first relational expression, determine the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value;
Described first relational expression can but be not limited to: λ (k)=max (λ, λ (k-1)-γ); Wherein λ and γ are constant, the resource total value that can distribute to all real time business of current admittance control period of λ (k) expression accounts for the ratio of system's total resources value, and the resource total value that can distribute to all real time business of last admittance control period of λ (k-1) expression accounts for the ratio of system's total resources value.
If not, then the resource total value that can distribute to all real time business based on the last admittance control period accounts for the ratio of system's total resources value, utilize second relational expression, determine the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value;
Described second relational expression can but be not limited to λ (k)=min (λ (k-1)+γ, 1.0); Wherein γ is a constant, the resource total value that can distribute to all real time business of current admittance control period of λ (k) expression accounts for the ratio of system's total resources value, and the resource total value that can distribute to all real time business of last admittance control period of λ (k-1) expression accounts for the ratio of system's total resources value.
Step 22:, determine the resource total value that to distribute to all real time business based on the total resources value and the described ratio that obtains of system.
With a specific embodiment admittance controlling schemes provided by the invention is described below.
Embodiment one:
Shown in Fig. 2 c, the schematic flow sheet of the acceptance controlling method that proposes for the embodiment of the invention one, concrete process description is as follows:
Step 1 receives the admittance request message that is used to ask admission service;
Step 2, the admittance controller of base station side is judged the type of the business that request is admitted, if non-real-time service (NRT) is admitted in request, then admits this non-real-time service, and enters resource allocator and carry out follow-up resource allocation flow process;
Step 3 if real time business is admitted in request, is then divided into it two classes, and a class is that the real time business (RT_handover) of coming is switched in the sub-district beyond from this sub-district, and another kind of is the new real time business (RT) of initiating in this sub-district; Determine that the admittance priority of all RT_handover all is higher than the admittance priority of all RT; And respectively at RT_handover and RT, according to the time that receives each request message by the order after arriving first, determine each RT_handover that described each request message requests admits and the admittance priority of each RT;
Step 4 is distinguished the type of the real time business of this request admittance according to above-mentioned differentiating method, and determines the admittance priority of this real time business; Based on described definite admittance priority, judge whether to distribute to the resource of this real time business,, it is deposited in high-priority queue (promptly being used for the formation of buffer memory RT_handover) or deposits Low Priority Queuing (promptly being used for the formation of buffer memory RT) in for not the time in judged result according to the type of this real time business of distinguishing;
Certainly, if judged result for being, is then admitted this real time business, and is entered follow-up resource allocation process (not shown).
Step 5, follow-up in official hour, based on described definite admittance priority, continue to judge whether to distribute to the resource of this real time business;
In the above-mentioned steps 4 when not depositing real time business in formation, judge whether to distribute to the process of the resource of this real time business, after depositing real time business in formation in the above-mentioned steps 5, the process of resource that continues to judge whether to distribute to this real time business is similar, is specially:
A, determine the ratio that the current resource total value of distributing to all real time business accounts for system's total resources value.
In order to overcome the interim overload that switching and multiple business type are brought, the embodiment of the invention does not have the admittance thresholding of using system total resources as real time business, because the priority of video traffic is higher, if most of resources (even all resources) are shared by real time business, when interim overload takes place (user or MPEG video etc. are professional to be produced by switching) so, systematic function meeting variation, even be in overload for a long time, and the connection that keeps certain non real-time user can be avoided the generation of this situation, determines at first that therefore the current resource total value of distributing to all real time business accounts for the ratio of system's total resources value:
The packet loss δ of a last Transmission Time Interval (a last TTI) of receiving terminal feedback I-1, judge described δ I-1Whether greater than target packet loss η, if judge δ I-1Utilize following relational expression during＞η, calculate in current TTI, the resource that can distribute to real time business accounts for the ratio λ (i) of system's total resources:
λ (i)=max (λ, λ (i-1)-γ), wherein λ and γ are constant, the resource total value that λ (i) expression current TTI can be distributed to all real time business accounts for the ratio of system's total resources value, and the resource total value that the last TTI of λ (i-1) expression can distribute to all real time business accounts for the ratio of system's total resources value;
If judge δ I-1During≤η, utilize following relational expression, calculate in current TTI, the resource that can distribute to real time business accounts for the ratio λ (i) of system's total resources:
λ (i)=max (λ (i-1)+γ, 1.0), wherein γ is a constant, the resource total value that λ (i) expression current TTI can be distributed to all real time business accounts for the ratio of system's total resources value, and the resource total value that the last TTI of λ (i-1) expression can distribute to all real time business accounts for the ratio of system's total resources value.
B, determine the total resources value of system.
System's total resources value is a cell capacity in the present embodiment, with the estimation of the successful bit number that transmits as cell capacity, that is:
μ ( i ) = ( Σ m = 1 N ( k ) β m ( i ) × 1 T ) , Wherein, T represents Transmission Time Interval (TTI); I TTI of μ (i) expression goes up the bit rate of estimating transmission, the sum of the connection that N (i) expression sub-district is activated on i TTI, β m(i) last m of i TTI of expression connects the bit number of going up the success transmission.
The capacity C (i) of sub-district is during i TTI:
C (i)=C (i-1) * (1-α)+μ (i) * α, the capacity of sub-district when wherein C (i) is i TTI, the capacity of sub-district when C (i-1) is i-1 TTI, α is a weighted factor.
C, account for the ratio λ (i) of system's total resources value based on the described current resource total value of determining of distributing to all real time business, and the total resources value C of system (i) that determines, can determine current resource total value λ (the i) * C (i) that distributes to all real time business;
D, based on the admittance priority of determining, judge whether to distribute to the resource of this real time business.
Admittance priority at the real time business of this request of determining, when being higher than the admittance priority of all unaccepted each real time business, judge the shared resource value of having been admitted of each real time business, add the required resource value sum that takies of real time business of this request, whether be not more than the described resource total value of obtaining; Promptly admit high-priority service earlier, admit low priority traffice again.
Admittance condition for this real time business is:
Σ I RT ( i ) L req , m + L req ≤ C ( i ) × λ ( i ) , Wherein, 1≤m≤N (i), N (i) is I RTThe set of the real time business that i TTI admitted (i), m is the index of the real time business admitted, L Req, mBe the speed that the real-time business request of having been admitted is transmitted, L ReqFor this asks the request transmission rate of the real time business of admittance.
If satisfy above-mentioned admittance condition, then admit the real time business of this request, and enter resource allocator;
If do not satisfy above-mentioned admittance condition, then from described formation, delete the real time business of this request.
After admitting controller to finish above-mentioned admittance control operation, resource allocator is the priority that the business of admittance is determined resource allocation, and Fig. 3 a is the method flow schematic diagram of definite priority of resource allocation of embodiment of the invention proposition, and concrete process description is as follows:
Step 31: obtain and admit the object transmission time delay value of real time business in the current resource allocation period;
The described process of obtaining can but be not limited to following flow process:
Judge that this has admitted real time business at the packet loss of the last resource allocation period of current resource allocation period, whether greater than default target packet loss;
If, then, utilize first relational expression based on the object transmission time delay value of this real time business of last resource allocation period, determine the object transmission time delay value of current this real time business of resource allocation period;
Described first relational expression can but be not limited to: Δ T (t)=min (Δ T (t-1)+Δ T, T);
Certainly, also can be based on the kind of this real time business and the object transmission time delay value of this real time business of last resource allocation period, the second subrelation formula of utilizing first relational expression to comprise is determined the object transmission time delay value of current this real time business of resource allocation period;
The described second subrelation formula can but be not limited to: Δ T m(t)=min (Δ T m(t-1)+Δ T, T);
If not, then, utilize second relational expression, determine the object transmission time delay value of current this real time business of resource allocation period based on the object transmission time delay value of this real time business of last resource allocation period;
Described second relational expression can but be not limited to: Δ T (t)=max (Δ T (t-1)-Δ T, 0);
Certainly, also can be based on the kind of this real time business and the object transmission time delay value of this real time business of last resource allocation period, the 3rd subrelation formula of utilizing second relational expression to comprise is determined the object transmission time delay value of current this real time business of resource allocation period;
Described the 3rd subrelation formula can but be not limited to: Δ T m(t)=max (Δ T m(t-1)-and Δ T, 0)
Described first relational expression and second relational expression, and in the second subrelation formula and the 3rd subrelation formula, Δ T is a constant, m is the index of variety classes business, T-Δ T m(t) be real time business in the object transmission time interval of current resource allocation period, T-Δ T m(t-1) be that real time business is at the object transmission time interval of last resource allocation period, Δ T m(t) the expression real time business is at the transmission protection interval of current resource allocation period, Δ T m(t-1) the expression real time business is at the transmission protection interval of last resource allocation period, and T is the maximum transmitted time delay of real time business.
Step 32: judge that this real time business is at the actual transmissions time delay value of current resource allocation period, whether greater than the described object transmission time delay value that obtains;
Step 33: when being, actual transmissions time delay value and object transmission time delay value based on described real time business utilize relational expression in judged result, determine the adjustment parameter of the priority of resource allocation of adjusting this real time business;
Described relational expression can but be not limited to: Q (t)=max (1, exp[α (W (t)+Δ T (t)-T)]);
Certainly, also can be based on the kind of this real time business and the actual transmissions time delay value and the object transmission time delay value of described real time business, the first subrelation formula of utilizing described relational expression to comprise is determined the adjustment parameter of the priority of resource allocation of adjusting this real time business;
The described first subrelation formula can but be not limited to:
Q(t)＝max(1，exp[α m(W(t)+ΔT m(t)-T)])
Concern in the minor that in above-mentioned relation formula and first m is the index of variety classes business, α mBe weighted factor, W (t) is a real time business at the actual transmissions time delay value of current resource allocation period, T-Δ T m(t) be real time business at the object transmission time delay value of current resource allocation period, Q (t) is the adjustment parameter of priority of resource allocation, and T is the maximum transmitted time delay of real time business, Δ T m(t) be the transmission protection interval of real time business in the current resource allocation period;
Step 34:, adjust the priority of resource allocation of this real time business based on the described adjustment parameter of determining;
For example the priority of resource allocation with this real time business multiply by the described adjustment parameter of determining.
The scheme of definite priority of resource allocation provided by the invention is described with a specific embodiment below.
Embodiment two:
In the present embodiment, to each carrier wave bunch, the priority of all customer services on certain carrier wave bunch is calculated by following formula with traditional PF algorithm application:
k n , m = arg max 1 ≤ k ≤ K ( r k , n r k , n ‾ ) ( R req k λ k ‾ ) , 1 ≤ n ≤ N sub -----Shi (1)
Wherein, λ kFor at time delay time window τ kThe average throughput of k interior customer service, r K, nAnd r K, nMomentary rate that is k customer service on n carrier wave bunch and average transmission rate when long, R Req kBe the speed of k customer service application, N SubBe the number of carrier wave bunch, m is the index of different types of business.
In order to support the qos requirement of different stage, present embodiment is introduced the function Q (t) of indication QoS satisfaction, i.e. the adjustment parameter Q (t) of priority of resource allocation:
Q (t)=max (1, exp[α m(W (t)+Δ T m(t)-T)])----formula (2)
Wherein, α m, Δ T m(t) represent that respectively (m is the index of different types of business, the α of every kind of business at interval for time delay weighted factor and transmission protection mWith Δ T m(t) value is inequality); W (t) is a packet delay; T is the maximum delay of bag; For non-real-time service, α is set m Be 0.
Wushu (2) adds formula (1) to, carries out the adjustment of priority of resource allocation, obtains adjusted priority k N, mFor:
k n , m = arg max 1 ≤ k ≤ K ( r k , n r k , n ‾ ) ( R req k λ k ‾ ) Q k ( t ) , 1 ≤ n ≤ N sub -----Shi (3)
As seen from formula (3), right overhead packet delay W (t) ∈ [0, T-Δ T m(t)], the delay requirement of expression real time business is satisfied fully, the priority of all bags is identical, this is compared with the algorithm that unconditionally gives the real time business higher priority, can obtain more multi-user diversity gain, because the method for definite priority of resource allocation that the employing present embodiment provides can be given the channel condition bigger transmission opportunity of customer service preferably;
If user's packet delay W (t) ∈ [T-Δ T m(t), T], for the qos requirement of the active user that guarantees to have been admitted, the dispatching priority of this active user business will be W (t)+Δ T with the parameter m(t)-the exponential growth of T.
Wherein, resource allocator feeds back QoS information dynamically to Δ T according to terminal m(t) value is adjusted, and when packet loss surpasses desired value η, makes Δ T m(t) value improves, otherwise then reduces Δ T m(t) value so that other business of giving with bigger transmission opportunity, improves resource utilization ratio, shown in Fig. 3 b, is the schematic flow sheet that obtains the object transmission time delay of the embodiment of the invention two propositions.
The embodiment of the invention provides a kind of admittance controller, as shown in Figure 4, comprising: receiving element 41 is used for receiving the request message that is used to ask admission service in the current admittance control period; First judging unit 42 is used to judge the request message that receiving element 41 receives, the type of request admission service; Non-real-time service is admitted unit 43, is used for admitting the non-real-time service of this request when the judged result of first judging unit 42 is non-real-time service for the type of asking admission service; Determining unit 44 is used for determining the admittance priority of the real time business of this request when the judged result of first judging unit 42 is real time business for the type of asking admission service; Second judging unit 45 is used for the admittance priority determined based on determining unit 44, judges whether to distribute to the resource of the real time business of this request; Real time business is admitted unit 46, and the judged result that is used at second judging unit 45 is when the resource of the real time business that can distribute to this request is arranged, to admit the real time business of this request.
Described admittance controller also comprises: buffer memory trigger element 47, when being used for judged result at second judging unit 45 and being not having to distribute to the resource of real time business of this request, cache request is admitted the request message of this real time business, and trigger second judging unit 45 in follow-up official hour, the admittance priority of this real time business that continuation is determined based on determining unit 44 judges whether to distribute to the resource of the real time business of this request; Real time business admit unit 46 in the continuation judged result of second judging unit 45 for sometimes, admit the real time business of this request; Delete cells 48, be used for after real time business admits unit 46 to admit the real time business of this request, this request message of deletion buffer memory trigger element 47 buffer memorys, and in the continuation judged result of second judging unit 45 when not having, delete this request message of buffer memory trigger element 47 buffer memorys.
Described second judging unit 45 specifically comprises: obtain subelement, be used to obtain the current admittance control period can distribute to the resource total value of all real time business; Judgment sub-unit, the admittance priority that is used for the real time business of this request of determining in determining unit 44, when being higher than the admittance priority of all unaccepted each real time business, judge the shared resource value of having been admitted of each real time business, add the required resource value sum that takies of real time business of this request, whether be not more than and obtain the resource total value that subelement obtains; If then judge the resource of the real time business that can distribute to this request; If not, then judge the resource of the real time business that does not have to distribute to this request.
The embodiment of the invention provides a kind of device of real time business Resources allocation that is, as shown in Figure 5, comprising: acquiring unit 51 is used to obtain the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value; Determining unit 52 is used for the ratio that total resources value and acquiring unit 51 based on system obtain, and determines the current admittance control period and can distribute to the resource total value of all real time business.
Described acquiring unit 51 specifically comprises: judgment sub-unit is used to judge the packet loss of the real time business of having been admitted in the last admittance control period of current admittance control period, whether greater than default target packet loss; First determines subelement, be used in the judged result of judgment sub-unit when being, the resource total value that can distribute to all real time business based on the last admittance control period accounts for the ratio of system's total resources value, utilize first relational expression, determine the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value; Second determines subelement, be used in the judged result of judgment sub-unit for not the time, the resource total value that can distribute to all real time business based on the last admittance control period accounts for the ratio of system's total resources value, utilize second relational expression, determine the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value.
The embodiment of the invention provides a kind of device of definite priority of resource allocation, as shown in Figure 6, comprising: acquiring unit 61 is used to obtain and has admitted the object transmission time delay value of real time business in the current resource allocation period; Whether judging unit 62 is used to judge this real time business at the actual transmissions time delay value of current resource allocation period, the object transmission time delay value that obtains greater than acquiring unit 61; Determining unit 63 is used in the judged result of judging unit 62 based on the actual transmissions time delay value and the object transmission time delay value of described real time business, determining the adjustment parameter of the priority of resource allocation of adjusting this real time business when being; Adjustment unit 64 is used for the adjustment parameter determined based on determining unit 63, adjusts the priority of resource allocation of this real time business.
Described acquiring unit 61 specifically comprises: judgment sub-unit is used to judge that this has admitted real time business at the packet loss of the last resource allocation period of current resource allocation period, whether greater than default target packet loss; First determines subelement, be used in the judged result of judgment sub-unit when being, object transmission time delay value based on this real time business of last resource allocation period utilizes first relational expression, determines the object transmission time delay value of current this real time business of resource allocation period; Second determines subelement, be used in the judged result of judgment sub-unit for not the time, object transmission time delay value based on this real time business of last resource allocation period utilizes second relational expression, determines the object transmission time delay value of current this real time business of resource allocation period.
The embodiment of the invention adopts two-stage to admit controlling Design thought, by the performance of admitting controller and resource allocator to come other performance of Combined Protection customer call level and package level.The embodiment of the invention is not used the admittance thresholding of all told of sub-district as real time business, but keep certain non real-time user's connection, can when interim overload takes place, still can guarantee the service quality of system, promptly guarantee certain cutting off rate and call barring rate indirectly; Because the scheme that the embodiment of the invention proposes is the certain non real-time user's of maintenance a number of connection, so compared with general resource reservation scheme, improved resource utilization.
The admittance controlling schemes that the embodiment of the invention proposes has effectively been distinguished the vertical user of switching of difference ((the real time business user of switching) and new access requesting users (the new active user of initiating in this sub-district).
Adopting the present invention is admittance controlling schemes and the Resource Allocation Formula that embodiment proposes, and can make the packet loss of system maintain target packet loss level, has satisfied based on the next generation wireless communication system docking of OFDM technology and has received the corresponding requirements that control proposes.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (24)

1, a kind of acceptance controlling method is characterized in that, comprising:
The admittance control period current, receive the request message that is used to ask admission service;
Judge the type of described request message request admission service;
If the type of request admission service is a non-real-time service, then admit the non-real-time service of this request;
If the type of request admission service is a real time business, then determine the admittance priority of the real time business of this request; And
Based on described definite admittance priority, judge whether to distribute to the resource of the real time business of this request;
In judged result is when the resource of the real time business that can distribute to this request is arranged, to admit the real time business of this request.
2, the method for claim 1 is characterized in that, determines the admittance priority of real time business, specifically comprises:
According to the time that receives each request message by the order after arriving first, determine each real time business admittance priority from high to low that described each request message requests is admitted.
3, the method for claim 1 is characterized in that, determines the admittance priority of real time business, specifically comprises:
The admittance priority of each real time business that comes is switched in sub-district beyond determining from this sub-district, all is higher than the admittance priority of new each real time business of initiating in this sub-district;
According to the time that receives each request message by the order after arriving first, determine that described each request message requests admits from this sub-district beyond the sub-district switch each real time business admittance priority from high to low of coming;
According to the time that receives each request message by the order after arriving first, determine new each real time business admittance priority from high to low initiated in this sub-district that described each request message requests is admitted.
4, the method for claim 1 is characterized in that, when also being included in judged result and being the resource of the real time business that does not have to distribute to this request, cache request is admitted the request message of this real time business;
In follow-up official hour,, judge whether to distribute to the resource of the real time business of this request based on the admittance priority of the real time business of this request of determining;
For sometimes, admit the real time business of this request in judged result, and delete the request message of described buffer memory;
When not having, delete the request message of described buffer memory in judged result.
5, as each described method of claim 1-4, it is characterized in that,, judge whether to distribute to the resource of the real time business of this request, specifically comprise based on the admittance priority of the real time business of determining:
Obtain the resource total value that the current admittance control period can distribute to all real time business;
Admittance priority at the real time business of this request of determining, when being higher than the admittance priority of all unaccepted each real time business, judge the shared resource value of having been admitted of each real time business, add the required resource value sum that takies of real time business of this request, whether be not more than the described resource total value of obtaining;
If then judge the resource of the real time business that can distribute to this request;
If not, then judge the resource of the real time business that does not have to distribute to this request.
6, method as claimed in claim 5 is characterized in that, describedly obtains the resource total value that the current admittance control period can distribute to real time business, specifically comprises:
Obtain the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value;
Based on the total resources value and the described ratio that obtains of system, determine the current admittance control period and can distribute to the resource total value of all real time business.
7, method as claimed in claim 6 is characterized in that, describedly obtains the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value, specifically comprises:
Whether the packet loss of the real time business that judgement was admitted in the last admittance control period of current admittance control period is greater than default target packet loss;
Based on described judged result, and account for the ratio of system's total resources value based on the resource total value that the last admittance control period can be distributed to all real time business, determine the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value.
8, method as claimed in claim 7 is characterized in that, the described resource total value of determining that the current admittance control period can distribute to all real time business accounts for the ratio of system's total resources value, specifically comprises:
When being, (λ, λ (k-1)-γ) determine the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value to utilize first relational expression: λ (k)=max in judged result;
For not the time, utilize second relational expression: λ (k)=min (λ (k-1)+γ, 1.0) in judged result, determine the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value;
Wherein λ and γ are constant, the resource total value that can distribute to all real time business of current admittance control period of λ (k) expression accounts for the ratio of system's total resources value, and the resource total value that can distribute to all real time business of last admittance control period of λ (k-1) expression accounts for the ratio of system's total resources value.
9, a kind of admittance controller is characterized in that, comprising:
Receiving element is used for receiving the request message that is used to ask admission service in the current admittance control period;
First judging unit is used to judge the request message that receiving element receives, the type of request admission service;
Non-real-time service is admitted the unit, is used for admitting the non-real-time service of this request when the judged result of first judging unit is non-real-time service for the type of asking admission service;
Determining unit is used for determining the admittance priority of the real time business of this request when the judged result of first judging unit is real time business for the type of asking admission service;
Second judging unit is used for the admittance priority determined based on determining unit, judges whether to distribute to the resource of the real time business of this request;
Real time business is admitted the unit, and the judged result that is used at second judging unit is when the resource of the real time business that can distribute to this request is arranged, to admit the real time business of this request.
10, admittance controller as claimed in claim 9, it is characterized in that, also comprise the buffer memory trigger element, when being used for judged result at second judging unit and being not having to distribute to the resource of real time business of this request, cache request is admitted the request message of this real time business, and trigger second judging unit in follow-up official hour, and continue the admittance priority of this real time business of determining based on determining unit, judge whether to distribute to the resource of the real time business of this request;
Real time business admit the unit in the continuation judged result of second judging unit for sometimes, admit the real time business of this request;
Delete cells, be used for after real time business admits the unit to admit the real time business of this request, this request message of deletion buffer memory trigger element buffer memory, and in the continuation judged result of second judging unit when not having, delete this request message of buffer memory trigger element buffer memory.
11, as claim 9 or 10 described admittance controllers, it is characterized in that described second judging unit specifically comprises:
Obtain subelement, be used to obtain the current admittance control period can distribute to the resource total value of all real time business;
Judgment sub-unit, the admittance priority of the real time business of this request that is used for determining in determining unit, when being higher than the admittance priority of all unaccepted each real time business, judge the shared resource value of having been admitted of each real time business, add the required resource value sum that takies of real time business of this request, whether be not more than and obtain the resource total value that subelement obtains; If then judge the resource of the real time business that can distribute to this request; If not, then judge the resource of the real time business that does not have to distribute to this request.
12, a kind of is the real time business method of allocating resources, it is characterized in that, comprising:
Obtain the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value;
Based on the total resources value and the described ratio that obtains of system, determine the current admittance control period and can distribute to the resource total value of all real time business.
13, method as claimed in claim 12 is characterized in that, describedly obtains the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value, specifically comprises:
Whether the packet loss of the real time business that judgement was admitted in the last admittance control period of current admittance control period is greater than default target packet loss;
Based on described judged result, and account for the ratio of system's total resources value based on the resource total value that the last admittance control period can be distributed to all real time business, determine the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value.
14, method as claimed in claim 13 is characterized in that, the described resource total value of determining that the current admittance control period can distribute to all real time business accounts for the ratio of system's total resources value, specifically comprises:
When being, (λ, λ (k-1)-γ) determine the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value to utilize first relational expression: λ (k)=max in judged result;
For not the time, utilize second relational expression: λ (k)=min (λ (k-1)+γ, 1.0) in judged result, determine the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value;
Wherein λ and γ are constant, the resource total value that can distribute to all real time business of current admittance control period of λ (k) expression accounts for the ratio of system's total resources value, and the resource total value that can distribute to all real time business of last admittance control period of λ (k-1) expression accounts for the ratio of system's total resources value.
15, a kind of is the device of real time business Resources allocation, it is characterized in that, comprising:
Acquiring unit is used to obtain the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value;
Determining unit is used for the ratio that total resources value and acquiring unit based on system obtain, and determines the current admittance control period and can distribute to the resource total value of all real time business.
16, device as claimed in claim 15 is characterized in that, described acquiring unit specifically comprises:
Judgment sub-unit is used to judge the packet loss of the real time business of having been admitted in the last admittance control period of current admittance control period, whether greater than default target packet loss;
First determines subelement, be used in the judged result of judgment sub-unit when being, the resource total value that can distribute to all real time business based on the last admittance control period accounts for the ratio of system's total resources value, utilize first relational expression, determine the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value;
Second determines subelement, be used in the judged result of judgment sub-unit for not the time, the resource total value that can distribute to all real time business based on the last admittance control period accounts for the ratio of system's total resources value, utilize second relational expression, determine the ratio that resource total value that the current admittance control period can distribute to all real time business accounts for system's total resources value.
17, a kind of method of definite priority of resource allocation is characterized in that, comprising:
Obtain and admit the object transmission time delay value of real time business in the current resource allocation period;
Judge that this real time business is at the actual transmissions time delay value of current resource allocation period, whether greater than the described object transmission time delay value that obtains;
When being,, determine the adjustment parameter of the priority of resource allocation of adjusting this real time business in judged result based on the actual transmissions time delay value and the object transmission time delay value of described real time business;
Based on the described adjustment parameter of determining, adjust the priority of resource allocation of this real time business.
18, method as claimed in claim 17 is characterized in that, the adjustment parameter of the priority of resource allocation of described definite this real time business of adjustment also will be based on the kind of this real time business.
19, method as claimed in claim 18, it is characterized in that, based on the kind of actual transmissions time delay value and object transmission time delay value and this real time business of described real time business, determine the adjustment parameter of the priority of resource allocation of adjusting this real time business according to following relational expression:
Q(t)＝max(1，exp[α m(W(t)+ΔT m(t)-T)])
Wherein m is the index of variety classes business, α mBe weighted factor, W (t) is a real time business at the actual transmissions time delay value of current resource allocation period, T-Δ T m(t) be real time business at the object transmission time delay value of current resource allocation period, Q (t) is the adjustment parameter of priority of resource allocation, and T is the maximum transmitted time delay of real time business, Δ T m(t) be the transmission protection interval of real time business in the current resource allocation period;
Described based on the adjustment parameter of determining, the priority of resource allocation of adjusting this real time business is:
The priority of resource allocation of this real time business be multiply by the described adjustment parameter of determining.
20, method as claimed in claim 17 is characterized in that, described obtaining admits real time business at the object transmission time delay value of current resource allocation period, specifically comprises:
Judge that this has admitted real time business at the packet loss of the last resource allocation period of current resource allocation period, whether greater than default target packet loss;
Based on described judged result, and, determine the object transmission time delay value of current this real time business of resource allocation period based on the object transmission time delay value of this real time business of last resource allocation period.
21, method as claimed in claim 20 is characterized in that, the object transmission time delay value of described definite current this real time business of resource allocation period also will be based on the kind of this real time business.
22, method as claimed in claim 21 is characterized in that, the described object transmission time delay value of determining current this real time business of resource allocation period specifically comprises:
When being, utilize first relational expression: Δ T in judged result m(t)=min (Δ T m(t-1)+and Δ T, T), determine the object transmission time delay value of current this real time business of resource allocation period;
For not the time, utilize second relational expression: Δ T in judged result m(t)=max (Δ T m(t-1)-and Δ T, 0), determine the object transmission time delay value of current this real time business of resource allocation period;
Wherein Δ T is a constant, and m is the index of variety classes business, T-Δ T m(t) be real time business in the object transmission time interval of current resource allocation period, T-Δ T m(t-1) be that real time business is at the object transmission time interval of last resource allocation period, Δ T m(t) the expression real time business is at the transmission protection interval of current resource allocation period, Δ T m(t-1) the expression real time business is at the transmission protection interval of last resource allocation period, and T is the maximum transmitted time delay of real time business.
23, a kind of device of definite priority of resource allocation is characterized in that, comprising:
Acquiring unit is used to obtain and has admitted the object transmission time delay value of real time business in the current resource allocation period;
Whether judging unit is used to judge this real time business at the actual transmissions time delay value of current resource allocation period, the object transmission time delay value that obtains greater than acquiring unit;
Determining unit is used in the judged result of judging unit based on the actual transmissions time delay value and the object transmission time delay value of described real time business, determining the adjustment parameter of the priority of resource allocation of adjusting this real time business when being;
Adjustment unit is used for the adjustment parameter determined based on determining unit, adjusts the priority of resource allocation of this real time business.
24, device as claimed in claim 23 is characterized in that, described acquiring unit specifically comprises:
Judgment sub-unit is used to judge that this has admitted real time business at the packet loss of the last resource allocation period of current resource allocation period, whether greater than default target packet loss;
First determines subelement, be used in the judged result of judgment sub-unit when being, object transmission time delay value based on this real time business of last resource allocation period utilizes first relational expression, determines the object transmission time delay value of current this real time business of resource allocation period;
Second determines subelement, be used in the judged result of judgment sub-unit for not the time, object transmission time delay value based on this real time business of last resource allocation period utilizes second relational expression, determines the object transmission time delay value of current this real time business of resource allocation period.
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