Optimal power allocation method for energy efficiency of air platform with limited satellite backhaul
An optimal power, aerial platform technology, applied in the direction of reducing energy consumption, advanced technology, wireless communication, etc., can solve problems such as excessive load and paralysis of ground network, reduce energy consumption, reduce computational complexity, and prolong effective survival time Effect
Active Publication Date: 2019-08-16
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
[0005] In order to solve the problem of excessive load or even paralysis of the ground network caused by large-scale disasters or emergencies, the present invention proposes an optimal power allocation method for energy efficiency of air platforms with limited satellite backhaul. The method considers the total power constraint, and the peak Power constraints, QoS requirements per user, and satellite backhaul link capacity constraints
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[0052] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0053] The flowchart of the method of the present invention is as figure 1 As shown, it specifically includes the following steps:
[0054] Step 1: Obtain the system parameters required for energy-efficient power allocation.
[0055] In this embodiment, the OFDM network carriers of 20 users in total work in the 2GHz frequency band, and the total bandwidth is 0.5MHz, which is divided into 20 subcarriers, and the bandwidth of each subcarrier is 25kHz for W, and the circuit power P c It is 35W. Total power constraint P Tot 40W, backhaul link capacity C backhaul 5Mbit, the peak power limit of a single user P peak is 10W, each user's QoS requirement r k,min It is 100kbit...
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The invention relates to a method for energy-efficient optimal power allocation of air platforms with limited satellite backhaul, including: obtaining system parameters required for power allocation; establishing consideration of total power constraints, peak power limitations, user QoS requirements, and satellite backhaul link capacity Restricted energy efficiency optimal model; introducing non-negative parameter λ to convert the objective function into an equivalent parameter-containing objective function; regardless of the limitations of total power and backhaul link capacity, the power allocation and Objective function value; update parameter λ; repeat the first two steps until the objective function value is less than a given threshold; get the lower bound of parameter λ from the total power limit and backhaul link capacity limit λ min ; Determine the optimal parameter λ * ;according to λ * Get the optimal power allocation of users. The energy efficiency optimal power allocation method proposed by the present invention considers the total power constraint, the peak power limit, the user QoS requirement and the backhaul link capacity limit, and has low algorithm complexity and strong realizability.
Description
technical field [0001] The invention relates to the technical field of space-space-ground joint communication, in particular to a method for optimal power allocation of air platforms with limited backhaul of satellites. Background technique [0002] When a large-scale disaster or unexpected emergency occurs, the affected people need to call for assistance or contact their relatives to find out if they are safe, so the ground communication network may be overloaded or even paralyzed. But at the same time communication systems play a very important role in public safety. Therefore, effective Public Protection and Disaster Relief (PPDR) systems are very important to satisfy victims and first responders, and unlike traditional cellular network communications, PPDR systems have specific requirements for underlying wireless technologies. The system should be quick to install, provide high-capacity coverage, and be flexible and stable. [0003] In this regard, the ABSOLUTE progra...
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IPC IPC(8): H04W72/04H04L27/26
CPCH04L27/2601H04W72/0473H04W72/54H04W72/53Y02D30/70
Inventor 王莹孙瑞锦许怡春陈勇策
Owner BEIJING UNIV OF POSTS & TELECOMM