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
CN101617482AInactive Publication Date: 2009-12-30QUALCOMM INC
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Patent Information

Authority / Receiving Office
CN Ā· China
Patent Type
Applications(China)
Current Assignee / Owner
QUALCOMM INC
Publication Date
2009-12-30
Estimated Expiration
Not applicable Ā· inactive patent

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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.
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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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