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Uplink power control method and device

A technology of power control and equipment, applied in power management, wireless communication, electrical components, etc., can solve the problems of unbalanced avalanche effect of heterogeneous network path loss and failure to clearly consider UE interference, etc., to reduce interference fluctuations, The effect of reducing the noise mean

Active Publication Date: 2017-10-27
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, PLD-based power control still relies on path loss measurements and does not explicitly consider UE-generated interference in neighboring cells
Therefore, PLD-based power control cannot solve the problem of unbalanced path loss in heterogeneous networks and the avalanche effect caused by the inability to directly reduce interference changes

Method used

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  • Uplink power control method and device

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Embodiment Construction

[0022] In a first aspect, embodiments of the present invention provide a method for user equipment to perform uplink power control. figure 1 It is a flowchart schematically showing a method for user equipment to perform uplink power control according to an embodiment of the present invention, and the method can be executed by a UE. In the following, without loss of generality, UE(i) is used to represent a specific user equipment, and a parameter with subscript i is used to represent parameters related to UE(i).

[0023] Such as figure 1 As shown, in step S101, the path loss from UE(i) to the serving cell and the neighboring cell with the strongest interference from UE(i) is estimated.

[0024] Although not shown in the figure, in one embodiment, the method further includes determining at UE(i) the neighbor cell most interfered by UE(i). In one implementation, UE(i) may determine the neighbor cell most interfered by it in the following manner.

[0025] First, UE(i) receives ...

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Abstract

Embodiments of the present invention provide a method and device for user equipment (UE) and eNode B to perform uplink power control, one of the methods includes: estimating the path from the UE to the serving cell and to the neighboring cell with the strongest interference from the UE Based on the path loss of the serving cell, the path loss of the adjacent cell, and the expected received power spectral density and path loss compensation factor obtained from the serving eNode B, determine the first candidate transmit power spectral density; based on the obtained from the serving eNode B The sum of the inter-cell interference power spectral density target value and the path loss of the adjacent cell determines the second candidate transmit power spectral density; the maximum transmit power spectral density allowed by the UE, the first candidate transmit power spectral density and the second The minimum value among the alternative transmit power spectral densities is determined as the uplink transmit power spectral density. The uplink power control method and device of the present invention can directly reduce large interference fluctuations caused by unbalanced path loss, and at the same time reduce the average value of interference by setting a clear ICI target value.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of wireless communication, and more specifically relate to an uplink power control method and device. Background technique [0002] The LTE uplink (UL) power control mechanism consists of a closed-loop component that operates around an open-loop operating point. LTE releases 8-11 have defined an open-loop power control scheme known as Fractional Power Control (FPC). The FPC solution allows partial compensation for the path loss (Path Loss, PL, path loss for short) of the serving cell. The FPC scheme relies only on the measurement of the path loss to the serving cell, under the assumption that the closer to the serving cell, the farther away from neighboring cells. Based on this assumption, in order to cause less interference to neighboring cells, the FPC scheme forces UEs at the cell edge to transmit at lower power compared to full compensation. The target SINR is set to increase as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/24H04W52/14
Inventor 刘瑾刘建国
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD