CN111343708B - Method for minimizing total energy consumption of system by considering circuit power consumption - Google Patents
Method for minimizing total energy consumption of system by considering circuit power consumption Download PDFInfo
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- CN111343708B CN111343708B CN202010221257.5A CN202010221257A CN111343708B CN 111343708 B CN111343708 B CN 111343708B CN 202010221257 A CN202010221257 A CN 202010221257A CN 111343708 B CN111343708 B CN 111343708B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a system total considering circuit power consumption under the condition of offline data packet transmissionThe energy consumption minimizing method can complete the transmission of all data packets within the total transmission time, and simultaneously, the total energy consumption of the system is minimized by moving the starting transmission time of each data packet and designing the transmission time of each data packet. The invention adopts internal iteration and external iteration in the optimization process, and in the internal iteration, the transmission time length of the data packet is optimized in turn according to the arrival sequence of the data packet; each external iteration comprisesM-1 internal optimization, comparing total energy consumption of the system after the current external iteration and the last external iteration, and judging whether to end the iteration according to the comparison result. After the iteration is finished, calculating the transmission rate of each data packet, and if the data packet with the transmission rate lower than the optimal transmission rate exists, adjusting the transmission rate of the data packet to be equal to the optimal transmission rate. The invention can effectively reduce the total energy consumption of the system and has low calculation complexity.
Description
Technical Field
The invention relates to a system total energy consumption minimization method considering circuit power consumption under the condition of offline data packet transmission, belonging to the wireless communication technology.
Background
With the development of 5G, the popularity of mobile terminals has increased rapidly, and the energy consumed by data transmission has also increased rapidly. From the viewpoints of environmental protection and sustainable development, improving transmission energy efficiency and reducing energy consumed for transmitting data have become a concern for future wireless transmission.
In order to meet the demands of users on data transmission, delay in the transmission process is reduced, and the traditional network generally enables data packets to be transmitted immediately, but the energy consumption in the data packet transmission process is larger, and the energy efficiency for transmitting the data packets is lower. According to the energy consumption formula when the data packet is transmitted, the longer the transmission time length is, the smaller the total energy consumption is, but the circuit energy consumption in the process of transmitting the data packet is not negligible, if the circuit energy consumption is considered, the total energy consumption is a function of decreasing and increasing the transmission time length. Therefore, on the premise of ensuring transmission delay, the transmission time length of each data packet can be properly regulated so as to achieve the purpose of saving energy.
Disclosure of Invention
The invention aims to: in order to overcome the defects in the prior art, the invention provides a method for minimizing the total energy consumption of a system for transmitting data packets by considering circuit power consumption under the off-line condition, which can design the transmission duration of each data packet with lower complexity within the specified total transmission duration so as to minimize the total energy consumption of the system.
The technical scheme is as follows: in order to achieve the above purpose, the technical scheme adopted by the invention is as follows.
The method for minimizing total energy consumption of the system by considering circuit power consumption under the condition of offline transmission of data packets can finish transmission of all the data packets within the total transmission duration, and simultaneously, the total energy consumption of the system is minimized by moving the starting transmission time of each data packet and designing the transmission duration of each data packet. The method comprises the following steps.
(1) Parameter initialization: the total transmission time length isTThe total number of the data packets isMFirst, theiThe size of each data packet isB i First, theiThe arrival time of each data packet ist i The power consumption of the circuit isε(circuit power consumption with packet transmission isεCircuit power consumption is as follows when no data packet is transmittedε=0), the iteration termination threshold is Δ.
(2) Iterative initialization: let the first orderiThe starting transmission time of each data packets i And the firstiThe arrival time of each data packet ist i Identical, i.eτ i = s i+1 - s i Calculate the firstiTransmission duration of individual data packetsτ i First, theiTransmission rate of individual data packetsr i Data in the presence of circuit power consumptionOptimal transmission rate of packetsr ee (minimizing the overall energy consumption of the system).
(3) Internal and external iterations: in internal iteration, optimizing the transmission time length of the data packets in sequence according to the arrival sequence of the data packets; each external iteration comprisesM-1 internal optimization, comparing total energy consumption of the system after the current external iteration and the last external iteration, and judging whether to end the iteration according to the comparison result.
(4) Transmission rate substitution: calculating the transmission rate of each data packet, if the transmission rate is lower than the optimal transmission rater ee The transmission rate of the data packet is adjusted to be equal to the optimal transmission rate by shortening the transmission time of the data packetr ee 。
(5) The system is based on the adjusted parameters
And transmitting the data packet. />
Specifically, the step (3) includes the following steps.
(31) Calculating total energy consumption of system before optimization
The method comprises the steps of carrying out a first treatment on the surface of the Step (32) is entered.
（32）i=1; step (33) is entered.
(33) Fourth condition adjustmentiStart transmission time of +1 data packetss i+1 。
Case (1): if it isr i ≥r ee And is also provided withr i+1 ≥r ee Then maintainτ i +τ i+1 Delay of the first time under the condition of not changingiStart transmission time of +1 data packetss i+1 To prolongτ i And shortenτ i+1 Until the firstiData packet and the firsti+1 data packetsThe sum of the energy consumption of (2) is minimum; step (34) is entered.
Case (2): if it isr i ≥r ee And is also provided withr i+1 <r ee Then maintainτ i +τ i+1 Delay of the first time under the condition of not changingiStart transmission time of +1 data packetss i+1 To prolongτ i And shortenτ i+1 Until the firstiTransmission rate of +1 data packetsr i+1 Equal to the optimal transmission rater ee The method comprises the steps of carrying out a first treatment on the surface of the Step (34) is entered.
Case (3): if it isr i <r ee And is also provided withr i+1 ≥r ee Maintain the firstiData packet and the firstiThe starting transmission time and transmission time length of +1 data packets are unchanged; step (34) is entered.
Case (4): if it isr i <r ee And is also provided withr i+1 <r ee Maintain the firstiData packet and the firstiThe starting transmission time and transmission time length of +1 data packets are unchanged; step (34) is entered.
(34) Judgingi=M-whether or not 1 holds: if true: step (35) is entered; otherwise the first set of parameters is selected,i = i+1, returning to step (33).
(35) Computing total energy consumption of a system
The method comprises the steps of carrying out a first treatment on the surface of the Step (36) is entered.
(36) JudgingE 0 -EWhether delta is smaller than or equal to: if so, entering the step (4); otherwise the first set of parameters is selected,E 0 =Eand (3) returning to the step (32).
Specifically, in the step (4), the transmission rate of each data packet is calculated, if there is a transmission rate lower than the optimal transmission rater ee Data of (2)A packet, the transmission rate of the data packet is adjusted to be equal to the optimal transmission rate by shortening the transmission time of the data packetr ee The method comprises the steps of carrying out a first treatment on the surface of the And on the premise of ensuring that the starting transmission time of the data packet is later than the arrival time of the data packet, the starting transmission time of the data packet after the data packet is advanced as much as possible, and the maximum value of the advanced time length is the shortened transmission time of the data packet.
The beneficial effects are that: the system total energy consumption minimization method considering circuit power consumption under the condition of offline transmission of the data packets can finish the transmission of the data packets required by a user within the specified total transmission time, and the transmission time of each data packet is designed by moving the starting transmission time of each data packet, so that the system total energy consumption is minimized; meanwhile, the method has lower calculation complexity.
Drawings
Fig. 1 shows an example of the variation of the total energy consumption of the system with the number of external iterations when 10 data packets are transmitted.
FIG. 2 is a comparison of the total energy consumption of the system in the method of the present invention with the total energy consumption of the system in the instant transmission method.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
The invention provides a system total energy consumption minimization method considering circuit power consumption under the condition of off-line transmission of data packets. The method comprises the following steps.
(1) Parameter initialization: the total transmission time length isTThe total number of the data packets isMFirst, theiThe size of each data packet isB i First, theiThe arrival time of each data packet ist i The power consumption of the circuit isε(circuit power consumption with packet transmission isεCircuit power consumption is as follows when no data packet is transmittedε=0), iterative terminalThe stop threshold is delta.
(2) Iterative initialization: let the first orderiThe starting transmission time of each data packets i And the firstiThe arrival time of each data packet ist i Identical, i.eτ i = s i+1 - s i Calculate the firstiTransmission duration of individual data packetsε i First, theiTransmission rate of individual data packetsr i Optimal transmission rate of data packets in the presence of circuit power consumptionr ee 。
(3) Internal and external iterations: in internal iteration, optimizing the transmission time length of the data packets in sequence according to the arrival sequence of the data packets; each external iteration comprisesM-1 internal optimization, comparing total energy consumption of the system after the current external iteration and the last external iteration, and judging whether to end the iteration according to the comparison result; the optimization process can be expressed as
Function (F)>
Comprising the following steps.
(31) Calculating total energy consumption of system before optimization
The method comprises the steps of carrying out a first treatment on the surface of the Step (32) is entered.
（32）i=1; step (33) is entered.
(33) Fourth condition adjustmentiStart transmission time of +1 data packetss i+1 。
Case (1): if it isr i ≥r ee And is also provided withr i+1 ≥r ee Then maintainτ i +τ i+1 Delay of the first time under the condition of not changingiStart transmission time of +1 data packetss i+1 To prolongτ i And shortenτ i+1 Until the firstiData packet and the firstiThe sum of the energy consumption of +1 packets is minimal; step (34) is entered.
Case (2): if it isr i ≥r ee And is also provided withr i+1 <r ee Then maintainτ i +τ i+1 Delay of the first time under the condition of not changingiStart transmission time of +1 data packetss i+1 To prolongτ i And shortenτ i+1 Until the firstiTransmission rate of +1 data packetsr i+1 Equal to the optimal transmission rater ee The method comprises the steps of carrying out a first treatment on the surface of the Step (34) is entered.
Case (3): if it isr i <r ee And is also provided withr i+1 ≥r ee Maintain the firstiData packet and the firstiThe starting transmission time and transmission time length of +1 data packets are unchanged; step (34) is entered.
Case (4): if it isr i <r ee And is also provided withr i+1 <r ee Maintain the firstiData packet and the firstiThe starting transmission time and transmission time length of +1 data packets are unchanged; step (34) is entered.
(34) Judgingi=M-whether or not 1 holds: if true: step (35) is entered; otherwise the first set of parameters is selected,i = i+1, returning to step (33).
(35) Computing total energy consumption of a system
The method comprises the steps of carrying out a first treatment on the surface of the Step (36) is entered.
(36) JudgingE 0 -EWhether delta is smaller than or equal to: if so, entering the step (4); otherwise the first set of parameters is selected,E 0 =Eand (3) returning to the step (32).
(4) Transmission ofRate substitution: calculating the transmission rate of each data packet, if the transmission rate is lower than the optimal transmission rater ee The transmission rate of the data packet is adjusted to be equal to the optimal transmission rate by shortening the transmission time of the data packetr ee The method comprises the steps of carrying out a first treatment on the surface of the And on the premise of ensuring that the starting transmission time of the data packet is later than the arrival time of the data packet, the starting transmission time of the data packet after the data packet is advanced as much as possible, and the maximum value of the advanced time length is the shortened transmission time of the data packet.
(5) The system is based on the adjusted parameters
And transmitting the data packet.
In one embodiment of the method according to the invention, the circuit power consumption isε=8 watts, total transmission duration ofTThe arrival times of 10 packets are 0 seconds, 1 second, 2 seconds, 4 seconds, 5 seconds, 6 seconds, 7 seconds, 8 seconds, and 9 seconds, respectively, and the sizes of 10 packets are randomly allocated between 0.1Mb and 5 Mb. As shown in fig. 1, the result of the 10 packets after 10 external iterations is shown.
Fig. 2 is a comparison of the method of the present invention with a push-to-talk strategy. It can be seen that an algorithm that takes into account circuit consumption to minimize the total energy consumption of transmitting data packets can significantly reduce the total transmission energy consumption compared to just-in-time transmission.
In this embodiment, the beneficial effects of the algorithm that considers circuit consumption to minimize the total energy consumption of the transmitted data packet are mainly represented in two aspects: (1) The invention only needs few iterations, and has low complexity; (2) The present invention can reduce the total energy consumption better than the instant transmission time strategy.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (2)
1. A method for minimizing total energy consumption of a system taking into account circuit power consumption in the case of off-line transmission of data packets, characterized by: the transmission of all the data packets can be completed within the total transmission duration, and meanwhile, the total energy consumption of the system is minimized by moving the starting transmission time of each data packet and designing the transmission duration of each data packet; the method comprises the following steps:
(1) Parameter initialization: the total transmission time length is T, the total number of data packets is M, and the size of the ith data packet is B i The arrival time of the ith data packet is t i The power consumption of the circuit is epsilon, and the iteration termination threshold is delta;
(2) Iterative initialization: let the start transmission time s of the ith data packet i The arrival time with the ith data packet is t i Similarly, calculating the transmission time length tau of the ith data packet i Transmission rate r of ith packet i Optimal transmission rate r of data packets in the presence of circuit power consumption ee ；
(3) Internal and external iterations: in internal iteration, optimizing the transmission time length of the data packets in sequence according to the arrival sequence of the data packets; each external iteration comprises M-1 times of internal optimization, the total energy consumption of the system after the current external iteration and the system after the last external iteration are compared, and whether the iteration is ended or not is judged according to a comparison result; the method comprises the following steps:
(31) Calculating total energy consumption of system before optimization
Step (32) is entered;
(32) i=1; step (33) is entered;
(33) Adjusting the start transmission time s of the (i+1) th data packet according to four conditions i+1 ：
Case (1): if r i ≥r ee And r is i+1 ≥r ee Then maintain τ i +τ i+1 Delay the start transmission time s of the (i+1) th data packet without change i+1 To lengthen tau i And shorten tau i+1 Until the firstThe sum of the energy consumption of the i data packet and the i+1th data packet is minimum; step (34) is entered;
case (2): if r i ≥r ee And r is i+1 ＜r ee Then maintain τ i +τ i+1 Delay the start transmission time s of the (i+1) th data packet without change i+1 To lengthen tau i And shorten tau i+1 Up to the transmission rate r of the (i+1) th data packet i+1 Equal to the optimal transmission rate r ee The method comprises the steps of carrying out a first treatment on the surface of the Step (34) is entered;
case (3): if r i ＜r ee And r is i+1 ≥r ee Maintaining the transmission starting time and the transmission duration of the ith data packet and the (i+1) th data packet unchanged; step (34) is entered;
case (4): if r i ＜r ee And r is i+1 ＜r ee Maintaining the transmission starting time and the transmission duration of the ith data packet and the (i+1) th data packet unchanged; step (34) is entered;
(34) Judging whether i=m-1 holds: if true: step (35) is entered; otherwise, i=i+1, returning to step (33);
(35) Computing total energy consumption of a system
Step (36) is entered;
(36) Judgment E 0 E.ltoreq.Δ is true: if so, entering the step (4); otherwise, E 0 =e, returning to step (32);
(4) Transmission rate substitution: calculating the transmission rate of each data packet, if the transmission rate is lower than the optimal transmission rate r ee The transmission rate of the data packet is adjusted to be equal to the optimal transmission rate r by shortening the transmission time of the data packet ee ；
(5) The system adjusts the parameter tau according to the adjusted parameter tau i ,τ i+1 ,s i+1 ,B i ,B i+1 And transmitting the data packet.
2. According to claim 1The method for minimizing total energy consumption of the system by considering circuit power consumption under the condition of offline data packet transmission is characterized by comprising the following steps: in the step (4), the transmission rate of each data packet is calculated, if there is a transmission rate lower than the optimal transmission rate r ee The transmission rate of the data packet is adjusted to be equal to the optimal transmission rate r by shortening the transmission time of the data packet ee The method comprises the steps of carrying out a first treatment on the surface of the And on the premise of ensuring that the starting transmission time of the data packet is later than the arrival time of the data packet, the starting transmission time of the data packet after the data packet is advanced, and the maximum value of the advanced time length is the shortened transmission time of the data packet.
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| CN102970716A (en) * | 2012-12-17 | 2013-03-13 | 中国科学技术大学 | Transmission method with optimal energy efficiency under actual power consumption model |
| WO2016155945A1 (en) * | 2015-03-31 | 2016-10-06 | Qualcomm Technologies International, Ltd. | Data rate adaptation in a wireless transmitter |
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| US8175100B2 (en) * | 2008-10-15 | 2012-05-08 | Qualcomm Incorporated | Transmission scheduling optimization method and wireless user equipment device |
| CN102612125B (en) * | 2012-03-20 | 2014-04-30 | 北京航空航天大学 | High-energy-efficiency mixed relay transmission method based on time delay limited service |
| CN105657846B (en) * | 2016-03-04 | 2019-04-02 | 金陵科技学院 | A kind of double-layer lap of minimum power is for OFDM Subcarrier Allocation Algorithm |
| CN108966286B (en) * | 2018-07-11 | 2021-09-21 | 郑州航空工业管理学院 | Unmanned aerial vehicle-assisted mobile edge computing system and information bit distribution method thereof |
| CN110913468B (en) * | 2019-12-06 | 2023-06-06 | 金陵科技学院 | Energy saving transmission method based on pre-caching |
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| CN102970716A (en) * | 2012-12-17 | 2013-03-13 | 中国科学技术大学 | Transmission method with optimal energy efficiency under actual power consumption model |
| WO2016155945A1 (en) * | 2015-03-31 | 2016-10-06 | Qualcomm Technologies International, Ltd. | Data rate adaptation in a wireless transmitter |
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