CN101848500B - Sorting method of Qos scheduling - Google Patents
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Abstract
The present invention discloses a sorting method of Qos scheduling, which comprises the following steps: respectively setting a priority curve for each business type, and respectively setting a control parameter for each priority curve; generating sorting parameters according to the priority curve of each business type and a scheduling metric value, and determining the business type the priority of which needs to be increased and the business type the priority of which needs to be decreased according to the Qos parameters needed by a communication system and Qos parameters obtained by actual measurement, and adjusting the control parameters of the priority curves; adjusting the priority curves according to the adjusted control parameters, and adjusting the sorting parameters according to the adjusted priority curves; and sorting for queues of all business types according to the adjusted sorting parameters. The sorting method can maximize the capacity of the system under the condition of meeting the Qos requirements of the business types, and ensures the Qos requirements of the business type with high priority when the load of the system is excess.
Description
Technical field
The present invention relates to mobile communication technology, particularly relate to the sort method of a kind of service quality (Qos) scheduling.
Background technology
At present, insert in the wireless communication system of (HSPA) and Long Term Evolution (LTE), higher user throughput is provided through the chance scheduling in high-speed packet.The Qos scheduler need and keep the Qos balance between the user to weigh between the two in user rate summation maximization; Though certain user's real time channel quality is not fine sometimes; But because this user's actual time delay is bigger, so the Qos scheduler still need be dispatched it.Therefore, the chance in the present wireless communication system is dispatched to differ and as wired communication system, is changed into the QoS of better user's impression surely.
Need to support the multiple business type in the present communication system, and different business types has different Qos calling hierarchies, therefore need distinguish the priority of each type of service.In HSPA and LTE system, distinguish the priority of different service types through service priority indication (SPI).Therefore; The Qos scheduler need consider how between the Qos requirement of satisfying miscellaneous service and maximized system capacity, to obtain best balance; And; When the load of system increases or be excessive, need consider like the Qos scheduler what is dispersed in the reduction of Qos in the business of low SPI, so that Qos to be provided mild service of degenerating.
Present in HSPA and LTE system; Traditional sort method that the Qos scheduler uses comprises: training in rotation scheduling method, maximum are stated from than scheduling method and Proportional Fair sort method; Above-mentioned three kinds of sort methods are not all distinguished type of service SPI, are not suitable for the hybrid communication system that has multiple different service types.
The sort method of differentiated service type SPI comprises 2 kinds at present.In first method; SPI according to type of service sorts to the user fully; This method is simply distinguished the SPI of different service types; When system resource is not enough, can guarantee the user's of high priority Qos, but not consider user's instant channel quality and system loading, so sort method is reasonable inadequately.In another approach; Type of service for different SPI provides different priority curves respectively; Adopt fixing priority curve in the method, for polygon wireless communications environment, owing to there is dynamic system load; Therefore this method can't be adjusted the ordering of the type of service of different SPI according to dynamic change, and sort method is reasonable inadequately.In a word, in the sort method of all at present Qos scheduling, adopt any sort method to carry out the Qos scheduling, all can't in the communication system that comprises the multiple business type, realize satisfying the Qos requirement of miscellaneous service and the balance between the maximized system capacity.
Summary of the invention
The invention provides the sort method of a kind of Qos scheduling, adopt this sort method to carry out the Qos scheduling and can be in the communication system that comprises the multiple business type satisfying maximized system capacity under the situation that professional Qos requires.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses a kind of sort method of Qos scheduling, this method comprises:
For each type of service is provided with a priority curve respectively; For each bar priority curve is provided with the control parameter respectively; Confirm the scheduling metric based on scheduling type, generate the parameters sortnig of this type of service based on the priority curve and the scheduling metric of each type of service respectively;
Qos parameter according to the required Qos parameter of communication system and actual measurement obtain is confirmed type of service and the priority type of service to be reduced that priority is to be improved;
Control Parameter to above-mentioned priority type of service to be improved and priority type of service corresponding priorities curve to be reduced is adjusted;
According to adjusted Control Parameter adjustment priority curve,, type of service is sorted according to adjusted parameters sortnig according to adjusted priority curve adjustment parameters sortnig;
Wherein:
Said priority curve is linear function curve: PW
i=S*p
i* a
i* m
i, wherein, i is the formation numbering, PW
iBe the priority curve, S is the type of service number, p
iBe the Control Parameter of priority curve, m
iBe the Qos parameter that actual measurement obtains, a
iRelevant parameter for the required Qos parameter of communication system;
Or,
Said priority curve is log function curve: PW
i=log (c+S*p
i* a
i* m
i), wherein, i is the formation numbering, PW
iBe the priority curve, c is a constant, and S is the type of service number, p
iBe the Control Parameter of priority curve, m
iBe the Qos parameter that actual measurement obtains, a
iRelevant parameter for the required Qos parameter of communication system;
The said Qos parameter that obtains according to the required Qos parameter of communication system and actual measurement is confirmed type of service and the priority type of service to be reduced that priority is to be improved, and comprising:
Wait for that one is upgraded at interval;
The priority adjustment metric of this type of service of Qos calculation of parameter that obtains according to the required Qos parameter of the communication system of each type of service and actual measurement;
Judge whether to exist priority adjustment metric greater than zero type of service;
If not, return the step of carrying out a renewal interval of wait;
If priority is adjusted metric confirms as priority type of service to be improved, and judge whether to exist the minus type of service of priority adjustment metric greater than zero type of service;
If priority is adjusted the minus type of service of metric confirms as priority type of service to be reduced;
If, do not confirm not exist priority type of service to be reduced;
Said Control Parameter to above-mentioned priority type of service to be improved and priority type of service corresponding priorities curve to be reduced is adjusted, and comprising:
If confirm to exist priority type of service to be improved and priority type of service to be reduced; From priority type of service to be reduced, select one or more composition first set; From priority type of service to be improved, select one or more composition second set, the Control Parameter of the priority curve of the type of service during first set and second is gathered is adjusted;
If confirm the type of service that exists priority to be improved; And there is not priority type of service to be reduced; From priority type of service to be improved, select one or more composition first set; Less than selecting one or more composition second set the type of service of the SPI of all priority of selecting type of service to be improved, the Control Parameter of the priority curve of the type of service during first set and second is gathered is adjusted from service priority indication SPI;
The said Control Parameter adjustment of priority curve to the type of service in first set and second set comprises: according to the Control Parameter of the adjusted priority curve of following formula each type of service of calculating:
p
iu＝p
iu0+δ
iup
id0，
p
id＝p
id0-δ
idp
id0，
∑δ
iu＝∑δ
id，
δ
iu＝t，
Wherein, p
IuBe that type of service in first set is at the Control Parameter of adjusted priority curve, p
Iu0Be the Control Parameter of the priority curve of type of service before adjustment in first set, δ
IuFor adjusting the adjustment step-length of the type of service in first set of back, t is the first set step parameter; p
IdBe that type of service in second set is at the Control Parameter of adjusted priority curve, p
Id0Be the Control Parameter of the priority curve of type of service before adjustment in second set, δ
IdFor adjusting the adjustment step-length of the type of service in second set of back, δ
Id0For adjusting the adjustment step-length of the type of service in preceding second set, n is the element sum of second set.
Said parameters sortnig is:
Rank
i=PW
i* SM
i, wherein, i is the formation numbering, Rank
iBe the parameters sortnig of formation i, PW
iBe priority curve, SM
iBe the scheduling metric.
Said scheduling type is a Proportional Fair, and then said scheduling metric does
Wherein, i is the formation numbering, r
iBe the momentary rate of formation i,
Be the passing Mean Speed of formation i.
The priority adjustment metric of said this type of service of Qos calculation of parameter that obtains according to the required Qos parameter of the communication system of each type of service and actual measurement comprises:
Wherein, i is the formation numbering, α
iBe the priority adjustment metric of formation i, m
iBe the Qos parameter that actual measurement obtains, d
iBe the required Qos parameter of communication system, T is a priority adjustment thresholding, is used for α
iBe controlled between 1 and-1.
Said m
iBe the average delay in the certain hour section of actual measurement acquisition;
Said d
iBe the required average delay requirement of communication system;
Said T is the average delay thresholding of priority adjustment.
Said according to adjusted Control Parameter adjustment priority curve, according to adjusted priority curve adjustment parameters sortnig, after according to adjusted parameters sortnig the formation of all types of service being sorted, return to carry out and wait for that is upgraded a step at interval.
Visible by above summary of the invention; To the parameter among some Qos,, therefrom respectively select one or more types of service through investigating type of service and the priority type of service to be reduced that its Qos required value and actual measured value confirm that priority is to be improved; The Control Parameter of adjustment priority curve in selected type of service; Adjust the priority curve of selected type of service through this Control Parameter, confirm its parameters sortnig, sort according to this parameter according to the priority curve and the traditional scheduler metric of each type of service; Dispatch the formation of each type of service successively; Therefore, relevant to the ordering of type of service with the actual transmissions quality, thus can the high type of service of priority scheduling transmission quality.Thereby can under the situation that the Qos that satisfies type of service requires, maximize the capacity of system; And; When switch owing to the user minizone, cell channel sharply descends or other reason when causing system load excessive, can guarantee the Qos requirement of the type of service of high priority.
Description of drawings
Fig. 1 is the ordering system sketch map of GSM Qos scheduler;
Fig. 2 is the sort method flow chart of the Qos scheduling of first embodiment of the invention;
Fig. 3 is the sort method flow chart of the Qos scheduling of second embodiment of the invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer, describe the present invention below in conjunction with accompanying drawing and specific embodiment.
Basic thought of the present invention is; For each type of service is provided with the priority curve by Control Parameter control; Qos parameter according to the required Qos parameter of communication system and actual measurement obtain is confirmed type of service and the priority type of service to be reduced that priority is to be improved; Control Parameter to above-mentioned type of service corresponding priorities curve is adjusted; According to adjusted Control Parameter adjustment priority curve, according to the priority curve parameters sortnig is set, according to parameters sortnig type of service is sorted.
Fig. 1 is the ordering system sketch map of GSM Qos scheduler.As shown in Figure 1, the multiple business type is arranged in the system, in Fig. 1, represent to type of service n with type of service 1, type of service 2.Different business types has different SPI, and for example, IP phone (VoIP) business has higher SPI, and best effort (Best-Effort) business has minimum SPI, shows the Qos of the preferential VoIP of assurance of system's needs.Ordering system need determine the user of scheduling next time according to which kind of sequential scheduling different service types, and for example as shown in Figure 1, system possibly dispatch following radio bearer formation (RB): RB1 in order successively, and RB 2, RB K2, RB K
N-1+ 2 or the like.
Below through concrete execution mode, the sort method of Qos scheduler shown in Figure 1 is described.Fig. 2 is the sort method flow chart of the Qos scheduling of first embodiment of the invention.Fig. 3 is the sort method flow chart of the Qos scheduling of second embodiment of the invention.In second embodiment of the invention shown in Figure 3, carried out bright more in detail specifically to the sort method of first embodiment shown in Figure 2.Referring to Fig. 2 and shown in Figure 3, this method comprises the steps:
Step 21: for each type of service is provided with a priority curve respectively; For each bar priority curve is provided with Control Parameter respectively; Confirm the scheduling metric according to scheduling type, generate the parameters sortnig of this type of service according to the priority curve and the scheduling metric of each type of service respectively.
In this step, the parameters sortnig of Qos scheduler is defined as: Rank
i=PW
i* SM
i, wherein, i is the formation numbering.Rank
iBe the parameters sortnig of formation i, system is according to Rank
iRB to each type of service carries out descending sort.
SM
iFor the scheduling metric, for example, be the situation of Proportional Fair for scheduling type, this scheduling metric can be confirmed as
Wherein, i is the formation numbering, r
iBe the momentary rate of formation i,
Be the passing Mean Speed of formation i.
PW
iBe the priority curve.In the starting stage, scheduler defines a basic priority curve PW respectively for the type of service of each SPI
iPW
iBoth can be the linear function curve, also can be the curve of log function curve or other type of functions.For example, with linear function curve priority curve be: PW
i=S*p
i* a
i* m
i, perhaps, be example with the log function curve, the priority curve is: PW
i=log (c+S*p
i* a
i* m
i), in last two formulas, i is the formation numbering; PW
iBe the priority curve; C is a constant, and a kind of preferred implementation is c=1.1; S is the type of service number, also is a constant, and a kind of preferred implementation is S=15; p
iBe the Control Parameter of priority curve, and all p
iSummation be 1; m
iBe the Qos parameter that actual measurement obtains, for example actual time delay measured value; a
iBe the relevant parameter of the required Qos parameter of communication system, for example a
i=5/d
i, d
iBe the required Qos parameter of communication system, for example Qos delay requirement.
Step 22: the Qos parameter according to the required Qos parameter of communication system and actual measurement obtain is confirmed type of service and the priority type of service to be reduced that priority is to be improved.
In this step, specifically can adopt step 221 as shown in Figure 3 to step 224 to accomplish, detailed process is following:
Step 221: wait for that one is upgraded at interval.
Step 222: the priority adjustment metric of this type of service of Qos calculation of parameter that obtains according to the required Qos parameter of the communication system of each type of service and actual measurement.
Concrete computational methods are:
Wherein, i is the formation numbering, α
iBe the priority adjustment metric of formation i, m
iBe the Qos parameter that actual measurement obtains, d
iBe the required Qos parameter of communication system, T is a constant, and expression priority adjustment thresholding is used for α
iBe controlled between 1 and-1, in practical application, the value of T can require to adjust according to different system.Can adopt various Qos performances to consider here, for example, suppose that the Qos performance of being considered is meant average delay, then m
iBe the average delay in the certain hour section of actual measurement acquisition; d
iBe the required average delay requirement of communication system; T is the average delay thresholding of priority adjustment.
Step 223: judge whether to exist priority adjustment metric greater than zero type of service; If, do not return step 221; If, execution in step 224.
In this step, to whether there being α
i＞0 type of service is judged, α
i＞0 expression actual performance is worse than the Qos requirement, needs to improve the priority of this type of service.Still to consider that average delay is an example, α
i＞0 expression average delay then should business enough do not satisfied the transmission opportunity that its Qos requires, so the priority weighting of this type of service needs to improve greater than the Qos delay requirement.
Step 224: priority is adjusted metric confirm as priority type of service to be improved greater than zero type of service.
Step 225: judge whether to exist the minus type of service of priority adjustment metric; If, execution in step 226; If not, execution in step 227.
Step 226: priority is adjusted the minus type of service of metric confirm as priority type of service to be reduced.After step 226, execution in step 231.
Step 227: confirm not exist priority type of service to be reduced.After step 227, execution in step 232.
In step 225, to whether there being α
i＜0 type of service is judged, α
i＜0 expression actual performance is superior to the Qos requirement, can suitably reduce the priority of this type of service.Still to consider that average delay is an example, α
i＜0 expression average delay is less than the Qos delay requirement, and then this business has obtained enough satisfying the transmission opportunity that its Qos requires, and therefore can suitably reduce the priority weighting of this type of service, so that other has the business that needs to obtain more transmission opportunity.
After completing steps 22, continue to carry out following steps 23.
Step 23: the Control Parameter to above-mentioned priority type of service to be improved and priority type of service corresponding priorities curve to be reduced is adjusted.
In this step, specifically can adopt step 231 as shown in Figure 3 to step 234 to accomplish, detailed process is following:
If confirm to exist priority type of service to be improved and priority type of service to be reduced in the step 22, then execution in step 231, step 233 and step 235 successively.
Step 231: from priority type of service to be improved, select one or more composition first set.After step 231, execution in step 233.
Step 233: from priority type of service to be reduced, select one or more composition second set.After step 233, execution in step 235.
If confirm the type of service that exists priority to be improved in the step 22, and do not have priority type of service to be reduced, then execution in step 232, step 234 and step 235 successively.
Step 232: from priority type of service to be improved, select one or more composition first set.After step 232, execution in step 234.
Step 234: gather less than the one or more compositions second of selection the type of service of the SPI of all priority of selecting type of service to be improved from SPI.After step 234, execution in step 235.
Step 235: the Control Parameter of the priority curve of the type of service during first set gathered with second is adjusted.
In step 235, calculate the Control Parameter of the adjusted priority curve of each type of service according to following formula:
p
iu＝p
iu0+δ
iup
id0，
p
id＝p
id0-δ
idp
id0，
∑δ
iu＝∑δ
id，
δ
iu＝t，
Wherein, p
IuBe that type of service in first set is at the Control Parameter of adjusted priority curve, p
Iu0Be the Control Parameter of the priority curve of type of service before adjustment in first set, δ
IuFor adjusting the adjustment step-length of the type of service in first set of back, t is the first set step parameter, and in practical application, according to different system requirements, t can get different constant values; p
IdBe that type of service in second set is at the Control Parameter of adjusted priority curve, p
Id0Be the Control Parameter of the priority curve of type of service before adjustment in second set, δ
IdFor adjusting the adjustment step-length of the type of service in second set of back, δ
Id0For adjusting the adjustment step-length of the type of service in preceding second set, n is the element sum of second set.
After completing steps 23, continue to carry out following steps 24.
Step 24:,, type of service is sorted according to adjusted parameters sortnig according to adjusted priority curve adjustment parameters sortnig according to adjusted Control Parameter adjustment priority curve.
In step 24, according to adjusted Control Parameter adjustment priority curve in the step 23.
Visible by above embodiment; To the parameter among some Qos; Through investigating type of service and the priority type of service to be reduced that its Qos required value and actual measured value confirm that priority is to be improved, therefrom respectively select one or more types of service, the Control Parameter of adjustment priority curve in selected type of service; Adjust the priority curve of selected type of service through this Control Parameter; Priority curve and traditional scheduler metric according to each type of service are confirmed its parameters sortnig, sort according to this parameter, dispatch the formation of each type of service successively.Because to the parameter among some Qos of type of service; Through investigating its Qos required value and actual measured value priority is adjusted, therefore, relevant with the actual transmissions quality to the ordering of type of service; Thereby can the high type of service of priority scheduling transmission quality; Therefore, can under the situation that the Qos that satisfies type of service requires, maximize the capacity of system, and; When switch owing to the user minizone, cell channel sharply descends or other reason when causing system load excessive, can guarantee the Qos requirement of the type of service of high priority.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.
Claims (6)
1. the sort method of a Qos scheduling is characterized in that, this method comprises:
For each type of service is provided with a priority curve respectively; For each bar priority curve is provided with the control parameter respectively; Confirm the scheduling metric based on scheduling type, generate the parameters sortnig of this type of service based on the priority curve and the scheduling metric of each type of service respectively;
Qos parameter according to the required Qos parameter of communication system and actual measurement obtain is confirmed type of service and the priority type of service to be reduced that priority is to be improved;
Control Parameter to above-mentioned priority type of service to be improved and priority type of service corresponding priorities curve to be reduced is adjusted;
According to adjusted Control Parameter adjustment priority curve,, type of service is sorted according to adjusted parameters sortnig according to adjusted priority curve adjustment parameters sortnig;
Wherein:
Said priority curve is linear function curve: PW
i=S*p
i* a
i* m
i, wherein, i is the formation numbering, PW
iBe the priority curve, S is the type of service number, p
iBe the Control Parameter of priority curve, m
iBe the Qos parameter that actual measurement obtains, a
iRelevant parameter for the required Qos parameter of communication system;
Or,
Said priority curve is log function curve: PW
i=log (c+S*p
i* a
i* m
i), wherein, i is the formation numbering, PW
iBe the priority curve, c is a constant, and S is the type of service number, p
iBe the Control Parameter of priority curve, m
iBe the Qos parameter that actual measurement obtains, a
iRelevant parameter for the required Qos parameter of communication system;
The said Qos parameter that obtains according to the required Qos parameter of communication system and actual measurement is confirmed type of service and the priority type of service to be reduced that priority is to be improved, and comprising:
Wait for that one is upgraded at interval;
The priority adjustment metric of this type of service of Qos calculation of parameter that obtains according to the required Qos parameter of the communication system of each type of service and actual measurement;
Judge whether to exist priority adjustment metric greater than zero type of service;
If not, return the step of carrying out a renewal interval of wait;
If priority is adjusted metric confirms as priority type of service to be improved, and judge whether to exist the minus type of service of priority adjustment metric greater than zero type of service;
If priority is adjusted the minus type of service of metric confirms as priority type of service to be reduced;
If, do not confirm not exist priority type of service to be reduced;
Said Control Parameter to above-mentioned priority type of service to be improved and priority type of service corresponding priorities curve to be reduced is adjusted, and comprising:
If confirm to exist priority type of service to be improved and priority type of service to be reduced; From priority type of service to be improved, select one or more composition first set; From priority type of service to be reduced, select one or more composition second set, the Control Parameter of the priority curve of the type of service during first set and second is gathered is adjusted;
If confirm the type of service that exists priority to be improved; And there is not priority type of service to be reduced; From priority type of service to be improved, select one or more composition first set; Less than selecting one or more composition second set the type of service of the SPI of all priority of selecting type of service to be improved, the Control Parameter of the priority curve of the type of service during first set and second is gathered is adjusted from service priority indication SPI;
The said Control Parameter adjustment of priority curve to the type of service in first set and second set comprises: according to the Control Parameter of the adjusted priority curve of following formula each type of service of calculating:
p
iu＝p
iu0+δ
iup
id0，
p
id＝p
id0-δ
idp
id0，
∑δ
iu＝∑δ
id，
δ
iu＝t，
Wherein, p
IuBe that type of service in first set is at the Control Parameter of adjusted priority curve, p
Iu0Be the Control Parameter of the priority curve of type of service before adjustment in first set, δ
IuFor adjusting the adjustment step-length of the type of service in first set of back, t is the first set step parameter; p
IdBe that type of service in second set is at the Control Parameter of adjusted priority curve, p
Id0Be the Control Parameter of the priority curve of type of service before adjustment in second set, δ
IdFor adjusting the adjustment step-length of the type of service in second set of back, δ
Id0For adjusting the adjustment step-length of the type of service in preceding second set, n is the element sum of second set.
2. sort method according to claim 1 is characterized in that, said parameters sortnig is:
Rank
i=PW
i* SM
i, wherein, i is the formation numbering, Rank
iBe the parameters sortnig of formation i, PW
iBe priority curve, SM
iBe the scheduling metric.
3. sort method according to claim 1 and 2 is characterized in that,
Said scheduling type is a Proportional Fair, and then said scheduling metric does
Wherein, i is the formation numbering, r
iBe the momentary rate of formation i,
Be the passing Mean Speed of formation i.
4. sort method according to claim 1 is characterized in that, the priority adjustment metric of said this type of service of Qos calculation of parameter that obtains according to the required Qos parameter of the communication system of each type of service and actual measurement comprises:
Wherein, i is the formation numbering, α
iBe the priority adjustment metric of formation i, m
iBe the Qos parameter that actual measurement obtains, d
iBe the required Qos parameter of communication system, T is a priority adjustment thresholding, is used for α
iBe controlled between 1 and-1.
5. sort method according to claim 4 is characterized in that,
Said m
iBe the average delay in the certain hour section of actual measurement acquisition;
Said d
iBe the required average delay requirement of communication system;
Said T is the average delay thresholding of priority adjustment.
6. sort method according to claim 1; It is characterized in that; Said according to adjusted Control Parameter adjustment priority curve; Adjust parameters sortnig according to adjusted priority curve, after according to adjusted parameters sortnig the formation of all types of service being sorted, return to carry out and wait for that is upgraded a step at interval.
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| CN105407059B (en) * | 2015-10-21 | 2019-05-10 | 浪潮(北京)电子信息产业有限公司 | A kind of QoS scheduler and dispatching method applied to scsi target device |
| CN106793133B (en) * | 2017-01-06 | 2020-05-12 | 国网江苏省电力公司信息通信分公司 | Scheduling method for guaranteeing multi-service QoS in electric power wireless communication system |
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| CN1964320A (en) * | 2006-09-21 | 2007-05-16 | 电子科技大学 | A method for packet dispatching of variable parameter for real-time mixed service environment |
| CN1968195A (en) * | 2006-05-29 | 2007-05-23 | 华为技术有限公司 | Communication system scheduling method |
| CN101030925A (en) * | 2006-03-03 | 2007-09-05 | 中兴通讯股份有限公司 | Method for scheduling Internet telephone protocol service |
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| CN101030925A (en) * | 2006-03-03 | 2007-09-05 | 中兴通讯股份有限公司 | Method for scheduling Internet telephone protocol service |
| CN1968195A (en) * | 2006-05-29 | 2007-05-23 | 华为技术有限公司 | Communication system scheduling method |
| CN1964320A (en) * | 2006-09-21 | 2007-05-16 | 电子科技大学 | A method for packet dispatching of variable parameter for real-time mixed service environment |
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