A Joint Dynamic Resource Allocation Method for Energy Efficiency Optimization in LTE Systems
An energy-efficient and allocated technology, applied in network traffic/resource management, wireless communication, power management, etc., can solve the problems of high implementation complexity, limited application, and no consideration of user service quality, user minimum data transmission rate, maximum transmission power of base station, etc. problem, to achieve the effects of reducing computational complexity, communication energy saving and environmental protection, and avoiding waste of frequency band resources
Active Publication Date: 2018-10-12
CHONGQING UNIV OF POSTS & TELECOMM
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However, none of the above literatures considers the user's service quality, such as the minimum data transmission rate requirements of each user and the maximum transmission power of the base station, so it is difficult to apply to the actual system
The literature ("Energy-Efficient Link Adaptation on a Rayleigh Fading Channel with ReceiverCSI," in Communications (ICC), 2011IEEE International Conference on, 2011, pp.1-5) puts forward a A resource allocation method for the optimal power closed-form solution that optimizes energy efficiency. However, this method can only be applied to single-user single-carrier systems and the circuit power is modeled as a constant, which greatly limits the application of this method.
Literature ("An Accurate Closed-Form Approximation of the EnergyEfficiency-Spectral Efficiency Trade-Off over the MIMO Rayleigh FadingChannel," in Communications Workshops (ICC), 2011IEEE International Conferenceon, 2011, pp.1-6) proposed a solution approximation Optimal energy-efficient iterative resource allocation algorithm, which includes internal iteration and external iteration, seeks an approximate optimal solution in the form of step-by-step search, and the implementation complexity is too high
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[0014] A joint dynamic resource allocation method for energy efficiency optimization in an LTE system provided by the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments.
[0015] Before setting forth the specific embodiment mode, at first the mathematical model used is introduced:
[0016] Taking the optimization of energy efficiency as an example, assuming that the eNB can accurately obtain the channel state information (CSIT) of all users, the channel is a block fading channel, that is, the channel of each user remains unchanged within a symbol interval (TTI), and are independent of each other on different TTIs. Establish an optimal energy efficiency model:
[0017]
[0018] s.t.
[0019]
[0020]
[0021]
[0022] P t ≤P total (5)
[0023] The circuit power includes two parts: the fixed paranoid power and the dynamic power, and the dynamic power can be expressed as a linear functi...
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The present invention provides a united dynamic resource allocation method of the energy efficiency optimization in an LTE system, relating to the united dynamic resource allocation method of the energy efficiency optimization in an LTE system. According to the method, stepwise resource scheduling is used, and the convex function of LTE system energy efficiency about spectral efficiency is used, which means that the energy efficiency is the convex function of transmission rate. When user dispatch is finished, an energy efficiency function is a section derivative continuous function, an optimal solution under an unconstrained condition is obtained, and thus an optimal rate closed-form solution under a satisfied constraint condition is obtained. Finaly the transmission power allocation is carried out according to the allocated transmission rate, the calculation complexity is effectivvey reduced through a stepwise resource scheduling strategy, a lot of iterative approximations are avoided, in the condition of ensuring user QoS requirements and spectrum efficiency, the energy efficiency is optimal, the energy utilization efficiency is improved, and thus the mobile communications is more environmentally friendly.
Description
technical field [0001] The invention relates to a dynamic resource allocation method for resource joint allocation, which belongs to the technical field of wireless and mobile communications, and in particular to a joint dynamic resource allocation method for energy efficiency optimization in an LTE (Long Term Evolution, long-term evolution) system. Background technique [0002] With the rapid development of modern communication technology and social science and technology and the gradual commercialization of 4G technology around the world, and the explosive growth of emerging services and mobile applications, mobile users have put forward higher requirements for transmission rates. LTE (Long Term Evolution, Long Term Evolution) communication system, as a transitional technology from 3G to 4G, will definitely bring a new communication service experience to human beings in the foreseeable future. [0003] However, with the rapid increase in the number of users and the continu...
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IPC IPC(8): H04W28/22H04W52/34H04W72/04H04W72/12
Inventor 蒋青张佳星李兆玉任行帆粟根花余瑶曾迪黄锐
Owner CHONGQING UNIV OF POSTS & TELECOMM