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A power control method for heterogeneous network uplink

A power control and heterogeneous network technology, applied in power management, wireless communication, electrical components, etc., can solve the problems of high data transmission rate and energy efficiency, and achieve the effects of increasing throughput, improving energy efficiency, and improving performance

Inactive Publication Date: 2015-08-19
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

Although the original power control methods have their own technical advantages, they cannot guarantee the high data transmission rate and energy efficiency at the same time.

Method used

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  • A power control method for heterogeneous network uplink
  • A power control method for heterogeneous network uplink
  • A power control method for heterogeneous network uplink

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0021] figure 1 It is a schematic diagram of a system model of U / C (user data plane and control plane) separating heterogeneous networks. Wherein, a macro cell (micro cell) includes M small cells (small cells), and one AP in each small cell provides services for N users therein. Both UE and AP obey Poisson distribution Φ AP and Φ UE , whose densities are λ AP and lambda UE . According to ...

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Abstract

The present invention discloses a power control method for the heterogeneous network (HetNet) uplink. The method includes: firstly, a distance between user equipment (UE) and a corresponding access point (AP) is determined, i.e., the UE sends an uplink pilot signal to the corresponding AP, and the AP receives the uplink pilot signal and determines the distance between the UE and the corresponding AP according to the path loss of the pilot signal; and users at different distances from the AP are provided with different uplink powers in a same small cell, wherein the uplink power decreases with the increment of the distance according to a power function, i.e., the closer the user is to the AP, the greater the transmission uplink power is. The positions of the AP and UE in the present invention are separately modeled as two independent homogeneous Poisson's point distribution (PPP distribution), and the performance of the system is studied via random geometry. The analysis of the simulation result proves that, compared with the conventional power control strategy, the method of the present invention optimizes the energy efficiency to a certain degree while increasing the average transmission rate, thereby effectively improving the performance of the entire system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and more specifically relates to a power control method for uplink of a heterogeneous network. Background technique [0002] With the rapid growth of the number of mobile communication users and business traffic, on the one hand, people expect that future mobile communication systems can provide higher data transmission rates; on the other hand, this will lead to a sharp increase in energy consumption. Therefore, data transmission rate and system energy efficiency become important indicators reflecting system performance. Considering the energy consumption of the system, for the cellular network with a very large user density, the research based on the power control of the mobile terminal is increasingly significant for saving energy consumption. [0003] There are three traditional power control methods as follows: (1) the case of no channel inversion power control (NCI), at this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/14H04W52/26
CPCH04W52/14H04W52/26
Inventor 张靖郑加强张艳霞葛晓虎
Owner HUAZHONG UNIV OF SCI & TECH
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