CN107148083B - Data and energy cooperation method based on price mechanism - Google Patents
Data and energy cooperation method based on price mechanism Download PDFInfo
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- CN107148083B CN107148083B CN201710186398.6A CN201710186398A CN107148083B CN 107148083 B CN107148083 B CN 107148083B CN 201710186398 A CN201710186398 A CN 201710186398A CN 107148083 B CN107148083 B CN 107148083B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005457 optimization Methods 0.000 claims abstract description 10
- 238000012546 transfer Methods 0.000 claims description 30
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000004891 communication Methods 0.000 abstract description 11
- 238000013468 resource allocation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
Abstract
The invention discloses a data and energy cooperation method based on a price mechanism. According to the price mechanism, the data and energy cooperation method for bandwidth and energy distribution is realized by solving the optimization problem, and the purpose of optimizing the system performance is achieved. The method can solve the problems of bandwidth and energy distribution of the nodes, can also be used for solving the problem of relay selection of the wireless EH cooperative communication system, and has wide applicability.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a data and energy cooperation method of a cooperative communication system.
Background
Increasing concerns over the energy consumption of wireless networks and the rise in earth temperature have prompted the development of more energy efficient communication technologies. Energy harvesting technology (EH) technology, which derives energy from renewable energy sources such as solar, wind, thermal and Radio Frequency (RF) energy, can drive communication devices and networks, presenting bright prospects for green communications.
In a wireless EH communication system, bidirectional cooperative transmission of data and energy between two EH-capable nodes a and B is currently studied, and data or energy may be transmitted from node a to node B, and data or energy may also be transmitted from node B to node a. In a cooperative communication network, existing research generally considers that a source node and a relay node have EH capabilities, the source node transmits data or energy to the relay node, and the relay node and a destination node cannot transfer energy. However, the current research is not deep enough, for example, because the relay node may have its own traffic in addition to relaying traffic from other nodes, how much bandwidth and energy the relay node allocates for transmitting its own traffic and how much bandwidth and energy the relay node allocates for forwarding the traffic is still a problem to be researched and solved.
Disclosure of Invention
Based on the above background, the present invention provides a data and energy cooperation method for realizing bandwidth and energy allocation by solving an optimization problem in a wireless EH cooperative communication system according to a price mechanism, so as to achieve the purpose of optimizing system performance. In the market balance problem, the factors of data services are considered, energy collection and transfer are also considered, and an innovative thought is provided for solving the problem of data and energy cooperation; the method can solve the problems of bandwidth and energy distribution of the nodes, can also be used for solving the problem of relay selection of the wireless EH cooperative communication system, and has wide applicability.
The main technical scheme of the invention is as follows:
(one) self-service transmission rate x of relay node nnRelay service transmission rate y with relay node nnThe sum of the bandwidths is less than or equal to the total bandwidth C of the relay node n for the self service and the relay servicenRelay service transmission rate y of relay node nnLess than or equal to the relay traffic I per unit time at the noden(μn,μ-n,n,-n) Energy transfer rate t of relay node nnLess than or equal to the energy transfer amount per unit time E at the noden(μn,μ-n,n,-n) In time, the bandwidth and energy distribution between the relay node and the destination node, which can transmit data and transfer energy, is solved by the following optimization problems:
energy transfer rate t in relay node nnIs less than or equal to the energy transfer amount E per unit time when only the energy transfer is considered at the noden,2(n,-n) And then, only considering the bandwidth and energy distribution problem during energy transfer between the relay node and the destination node, and solving the problem through the following optimization problems:
wherein: z is a radical ofnRepresenting the energy collection rate of the relay node n; lambda [ alpha ]nThe cost of the relay node n for the transmission rate of the unit service including the self service and the relay service is represented;nrepresenting the cost paid by the relay node n for the unit energy transfer rate; u shapen(xn,zn) The utility function of the relay node n for sending self service and collecting energy is shown; u shapen,2(zn) Is a utility function of the energy collected by the relay node n; mu.snRepresenting the price charged by the relay node n for the relay service; mu.s-nRepresenting the price charged by other relay nodes except the relay node n for the relay service;nrepresents the price charged by the relay node n for the transfer energy;-nindicating the price charged for the transferred energy by other relay nodes than relay node n.
Detailed Description
The wireless EH cooperative communication system model comprises a source node, a plurality of relay nodes and a destination node, and has energy collection capacity. The technical scheme of the invention respectively considers two situations, namely the problem of resource allocation when data can be transmitted and energy can be transferred between the relay node and the target node, and the problem of resource allocation when energy is transferred between the relay node and the target node.
And (I) resource allocation when the relay node and the destination node can transmit data and transfer energy.
Definition of xnThe self service transmission rate of the relay node n is obtained; y isnThe relay service transmission rate of the relay node n; z is a radical ofnIs the energy collection rate of the relay node n; t is tnIs the energy transfer rate of the relay node n; lambda [ alpha ]nThe cost is paid by the transmission rate of the unit service (including the self service and the relay service) by the relay node n;nis the cost of the relay node n to pay for the rate of energy transfer per unit. U shapen(xn,zn) Is a utility function of the relay node n for sending self-service and collecting energy, and the expression of the utility function can adopt one of various known forms, such as Un(xn,zn)＝log(1+xn+zn) And is not limited herein. I isn(μn,μ-n,n,-n) Relaying traffic for unit time at relay node n; en(μn,μ-n,n,-n) Is the amount of energy transfer per unit time at the relay node n. Wherein munThe price charged to the relay service for the relay node n; mu.s-nRelaying for other relay nodes than relay node nThe price of the service charge;na price charged for the transfer energy by the relay node n;-na price charged for transferring energy for other relay nodes than the relay node n; cnThe total bandwidth for the relay node n for its own traffic and relay traffic.
The bandwidth and energy allocation can then be solved by the following optimization problem:
the limiting conditions are: x is the number ofn+yn≤Cn；yn≤In(μn,μ-n,n,-n)；tn≤En(μn,μ-n,n,-n)；xn,yn,zn,tn,λn,n,μn,μ-n,n，,-nIs not less than 0. The optimization problem can be solved by various methods, and the various methods do not influence the solution of the problem of the invention and are not elaborated here.
And (II) only considering resource allocation during energy transfer between the relay node and the destination node.
Definition En,2(n,-n) The energy transfer amount per unit time at the relay node n when only the energy transfer is considered; u shapen,2(zn) Is a utility function of the energy collected by the relay node n, whose expression may take one of several forms known as Un,2(zn)＝log(1+zn) And is not limited herein. The bandwidth and energy allocation problem can then be solved by the following optimization problem:
the limiting conditions are: t is tn≤En，,2(n,-n)；zn,tn,n,n，,-nIs not less than 0. There are many existing methods for solving this optimization problem, and none of them affect the solution of the present invention, and are not described in detail here.
Claims (2)
1. A method of price mechanism based data and energy collaboration, the method comprising:
self-service transmission rate x of relay node nnRelay service transmission rate y with relay node nnThe sum of the bandwidths is less than or equal to the total bandwidth C of the relay node n for the self service and the relay servicenRelay service transmission rate y of relay node nnLess than or equal to the relay traffic I per unit time at the noden(μn,μ-n,n,-n) Energy transfer rate t of relay node nnLess than or equal to the energy transfer amount per unit time E at the noden(μn,μ-n,n,-n) In time, the bandwidth and energy distribution between the relay node and the destination node, which can transmit data and transfer energy, is solved by the following optimization problems:
wherein: z is a radical ofnRepresenting the energy collection rate of the relay node n; lambda [ alpha ]nThe cost of the relay node n for the transmission rate of the unit service including the self service and the relay service is represented;nrepresenting the cost paid by the relay node n for the unit energy transfer rate; u shapen(xn,zn) The utility function of the relay node n for sending self service and collecting energy is shown; mu.snRepresenting the price charged by the relay node n for the relay service; mu.s-nRepresenting the price charged by other relay nodes except the relay node n for the relay service;nrepresents the price charged by the relay node n for the transfer energy;-nindicating the price charged for the transferred energy by other relay nodes than relay node n.
2. A method of price mechanism based data and energy collaboration, the method comprising:
when the energy transfer rate t of the relay node nnIs less than or equal to the energy transfer amount E per unit time when only the energy transfer is considered at the noden,2(n,-n) And then, only considering the bandwidth and energy distribution problem during energy transfer between the relay node and the destination node, and solving the problem through the following optimization problems:
wherein: z is a radical ofnRepresenting the energy collection rate of the relay node n;nrepresenting the cost paid by the relay node n for the unit energy transfer rate;nrepresents the price charged by the relay node n for the transfer energy;-nrepresenting the price charged to the transferred energy by other relay nodes than the relay node n; u shapen,2(zn) Is a utility function of the energy collected by the relay node n.
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Citations (5)
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| CN102238685A (en) * | 2010-05-06 | 2011-11-09 | 华为技术有限公司 | Method and equipment for relay node selection and power distribution in wireless relay network |
| CN103619059A (en) * | 2013-12-09 | 2014-03-05 | 西安科技大学 | Power distribution method of bi-directional collaboration transmission system based on physical-layer network coding |
| CN104640123A (en) * | 2015-01-30 | 2015-05-20 | 南京邮电大学 | Multi-relay-node non-cooperative game motivating method |
| CN106304164A (en) * | 2016-08-12 | 2017-01-04 | 梁广俊 | A kind of federated resource distribution method based on energy acquisition cooperation communication system |
| CN106454990A (en) * | 2016-12-12 | 2017-02-22 | 广西师范大学 | Relay selection method considering energy transmission |
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Patent Citations (5)
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| CN102238685A (en) * | 2010-05-06 | 2011-11-09 | 华为技术有限公司 | Method and equipment for relay node selection and power distribution in wireless relay network |
| CN103619059A (en) * | 2013-12-09 | 2014-03-05 | 西安科技大学 | Power distribution method of bi-directional collaboration transmission system based on physical-layer network coding |
| CN104640123A (en) * | 2015-01-30 | 2015-05-20 | 南京邮电大学 | Multi-relay-node non-cooperative game motivating method |
| CN106304164A (en) * | 2016-08-12 | 2017-01-04 | 梁广俊 | A kind of federated resource distribution method based on energy acquisition cooperation communication system |
| CN106454990A (en) * | 2016-12-12 | 2017-02-22 | 广西师范大学 | Relay selection method considering energy transmission |
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| Title |
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| Mohsen Guizani;Bassem Khalfi;Bechir Hamdaoui.Cooperative Joint Power Splitting and Allocation Approach for Simultaneous Energy Delivery and Data Transfer.《2015 International Wireless Communications and Mobile Computing Conference (IWCMC)》.2015, * |
| Yi Zhang;Kun Xiao.Load balancing relay selection of the two-hop cooperative networks.《2013 15th IEEE International Conference on Communication Technology》.2014, * |
| 基于效用的无线传感器网络能量分配优化策略;廖盛斌，等;《电子与信息学报》;20080915;全文 * |
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