Preamble based uplink power control for LTE

A technology of power control and power control command, which is applied in the direction of transmission control/equalization, power management, electrical components, etc., and can solve problems such as difficulty in ensuring the reliability level of reception

Inactive Publication Date: 2009-12-30
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reduced overhead for supporting power control adjustments makes it difficult to ensure a sufficient level of reception reliability in all cases, especially with prolonged periods of data inactivity in the UL

Method used

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  • Preamble based uplink power control for LTE
  • Preamble based uplink power control for LTE
  • Preamble based uplink power control for LTE

Examples

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Embodiment Construction

[0037] [36] Various embodiments are now described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that the embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0038] [37] As used in this application, the terms "component," "module," "system," etc., are intended to refer to a computer-related entity, that is, hardware, firmware, a combination of hardware and software, software, or an executing in the software. For example, a component can be a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and / or a computer,...

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Abstract

Systems and methodologies are described that facilitate utilizing power control preambles with closed loop power control techniques in a wireless communication environment. An uplink grant can be transferred over a downlink (e.g., a first uplink grant after uplink inactivity), and a power control preamble can be sent over an uplink in response to the uplink grant. According to an example, transmission of the power control preamble can be explicitly scheduled and / or implicitly scheduled. The power control preamble can be transmitted at a power level determined by an access terminal utilizing an open loop power control mechanism. A base station can analyze the power control preamble and generate a power control command based thereupon to correct the power level employed by the access terminal. The access terminal can thereafter utilize the power control command to adjust the power level for uplink data transmission.

Description

[0001] Cross References to Related Applications [0002] [01] This application claims the benefit of US Provisional Patent Application S. No. 60 / 889,931, filed February 14, 2007, entitled "A METHOD ANDAPPARATUS FOR POWER CONTROL USING A POWER CONTROL PREAMBLE." The aforementioned application is fully incorporated herein by reference. technical field [0003] [02] The following description relates generally to wireless communications and, more particularly, to controlling uplink (UL) power levels used by access terminals in a Long Term Evolution (LTE) based wireless communications system. Background technique [0004] [03] Wireless communication systems are widely used in order to provide various types of communication such as voice and / or data that may be provided via such wireless communication systems. A typical wireless communication system or network may provide multiple users access to one or more shared resources (eg, bandwidth, transmit power, etc.). For example, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005
CPCH04W52/08H04W52/10H04W52/146
Inventor D·P·马拉蒂J·蒙托霍
Owner QUALCOMM INC
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