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Method and device for controlling uplink transmission power of user terminal

A technology of user terminal and transmission power, applied in the field of communication, can solve problems such as poor cell edge performance and avalanche effect, and achieve the effect of avoiding avalanche problems

Active Publication Date: 2014-11-12
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Eventually, the uplink transmission power of many user terminals reaches the maximum value, and thus leads to an avalanche effect of uplink transmission power control
In this case, the IoT of each cell will be very high, and the cell edge performance of the whole system will be very poor

Method used

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  • Method and device for controlling uplink transmission power of user terminal
  • Method and device for controlling uplink transmission power of user terminal
  • Method and device for controlling uplink transmission power of user terminal

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Embodiment Construction

[0015] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0016] figure 1 A wireless communication system 100 in which the present invention may be implemented is schematically shown.

[0017] like figure 1 As shown, the wireless communication system 100 includes a first base station 110 corresponding to a first cell, a second base station 120 corresponding to a second cell, and user terminals 130 and 140 .

[0018] The first base station 110 provides a first coverage area 110-a and the second base station 120 provides a second coverage area 120-a.

[0019] Here, it is assumed that the user terminal 130 is within the first coverage area 110-a. Accordingly, the user terminal 130 communicates with the first base station 110 via the wireless link 150 . The user terminal 140 is within the second coverage area 120-a. Accordingly, the user terminal 140 communicates with the second base station 120 via the wirele...

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Abstract

The invention provides a method and device for controlling the uplink transmission power of a user terminal. The method comprises the steps that the target interference and thermal noise IoT level of an adjacent cell is received from the adjacent cell; path loss from the user terminal in a service cell to the service cell and the adjacent cell is determined; an IoT calibration indicator is received from the adjacent cell; the uplink transmission power of the user terminal is determined regarding the path loss from the user terminal to the adjacent cell, the IoT calibration indicator received from the adjacent cell and the target IoT level of the adjacent cell; the determined uplink transmission power of the user terminal is sent to the user terminal. According to the method and device, the IoT level of each cell can be controlled correctly, and the problem of avalanche of closed-loop uplink transmission power control can be avoided.

Description

technical field [0001] The present invention relates to the communication field, and more specifically, the present invention relates to a method and device for controlling uplink transmission power of a user terminal. Background technique [0002] In a cellular wireless communication system, inter-cell interference exists between a serving cell of a user terminal and an adjacent cell. In order to control the inter-cell interference, the most important mechanism is to control the uplink transmission power of the user terminal, so as to ensure that the serving cell of the user terminal can have the desired signal-to-interference-plus-noise ratio (SINR). Neighboring cells have minimal interference. Generally, the uplink transmission power of a user terminal in a cell depends on the path loss from the user terminal to its serving cell, the target interference and thermal noise IoT (Interference over Thermal) operating point of its serving cell, and the The target SINR is dete...

Claims

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Application Information

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