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Uplink power control method and system of LTE (Long Term Evolution) system

A technology of power control and power authorization, applied in the field of communication, can solve problems such as not considering system performance and not guaranteeing the maximum utilization of transmission power

Inactive Publication Date: 2014-08-13
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The domestic patent application number is 200810096198.2, and the invention name is "path loss compensation factor configuration method and device". A method for adjusting the path loss compensation coefficient for the LTE system is given. Considering the interference factor, the base station adjusts the path loss compensation coefficient to adjust The uplink transmission power is notified to the UE, but the maximum utilization of the transmission power cannot be guaranteed, and the combination of power control and resource allocation is not considered to improve the overall system performance

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  • Uplink power control method and system of LTE (Long Term Evolution) system
  • Uplink power control method and system of LTE (Long Term Evolution) system
  • Uplink power control method and system of LTE (Long Term Evolution) system

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Embodiment Construction

[0034] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0035] The purpose of the uplink power control method of the present invention is to dynamically adjust the path loss compensation coefficient according to the path loss of the user equipment UE under the restriction of adjacent cell interference, so as to determine the power authorization on the unit RB when the adjacent cell interference is considered, while taking into account For resource allocation, a reasonable number of RBs and MCS (Modulation and Code Scheme, modulation and coding scheme) are determined according to the power authorization and notified to the UE to adjust the transmission power, which improves the performance of the system.

[0036] Firstly, the content related to the uplink power control of the LTE system is introduced.

[0037] The uplink power control of the LTE system is as follows: all UEs in the cell...

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Abstract

A method and system for uplink power control in a Long Term Evolution (LTE) system are disclosed by the present invention. A base station determines the lower limit M of the average interference to the neighboring cells from a user equipment and configures the upper limit M' of the average interference to the neighboring cells from the user equipment, and determines path loss compensation coefficient of the base station according to the upper limit and lower limit of the average interference to the neighboring cells from the user equipment and the pass loss of the user equipment; the base station calculates the power authorization for per Resource Block (RB) when considering the neighboring cell interference according to the path loss compensation coefficient, and thus obtains the number of RBs occupied by the Physical Uplink Shared Channel (PUSCH) and Modulation and Code Scheme (MCS); the base station transmits the RB number, MCS and the deference between target Signal to Interference pulse Noise Ratio (SINR) and the actual received SINR to the user equipment; the user equipment obtains by calculation or table-look-up according to the RB number and the MCS, and then adjusts transmission power according to, and. With the method and system of the present invention, the system performance can be improved efficiently.

Description

technical field [0001] The invention belongs to the technical field of communications, and in particular relates to a method and system for uplink power control of an LTE system. Background technique [0002] Since 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution, Long Term Evolution) uplink adopts single-carrier frequency division multiple access (Single-Carrier Frequency Division Multiple Access, SC- FDMA) technology, the uplink signals of different user equipment (User Equipment, UE) in a cell are mutually orthogonal, so there is no code division multiple access (CDMA) system that performs power control due to the near-far effect necessity. [0003] LTE uplink power control is mainly used to compensate channel path loss and suppress inter-cell interference. The power control mechanism of inter-cell interference suppression is different from that of single-cell power control. Single-cell power control is only used for path loss compensation. When a UE'...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/14H04W52/24
CPCH04W52/244H04W52/146
Inventor 杨晓玉赵刚
Owner ZTE CORP