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Method and apparatus to control transmission power and transmission rate of an air link

A technology of transmission power and transmission rate, which is applied in the direction of transmission modification based on link quality, adjustment of transmission rate, power management, etc., and can solve problems such as power control issues that have not been raised

Inactive Publication Date: 2012-04-25
INTEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, WLAN standards such as "IEEE802.11b, 1999 version" neither address power control issues nor provide enough information to MUs to utilize closed-loop power control methods

Method used

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  • Method and apparatus to control transmission power and transmission rate of an air link
  • Method and apparatus to control transmission power and transmission rate of an air link
  • Method and apparatus to control transmission power and transmission rate of an air link

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Embodiment Construction

[0025] In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be understood by one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to obscure the present invention.

[0026] Some portions of the detailed description below are described in terms of algorithms and symbolic representations of operations on data bits or binary digital signals in a computer memory. These algorithmic descriptions and representations may be the techniques used by those skilled in the data processing arts to convey the substance of their work to others skilled in the art.

[0027] Unless expressly stated otherwise, it should be apparent from the following discussion that discussions using terms such as "process," "c...

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Abstract

Briefly, the invention provides a method to control data transmission rate and transmission power level of a mobile unit. The method may include varying a data transmission rate value based on a difference between a received signal strength and a receiver sensitivity value and reducing the transmission power level when transmission is at the highest data transmission rate.

Description

Background technique [0001] In modern wireless communication systems, such as wireless local area network (WLAN) communication systems, radio transmitters may transmit signals at a fixed power level. Transmission at a fixed power level may become excessive as the communication distance between the mobile unit (MU) and the access point (AP) may decrease. In addition, when the communication distance between MU and AP increases, the transmission signal may be too weak. Therefore, the data transfer rate may be reduced. [0002] One approach to overcome the above disadvantages may be by utilizing closed-loop power control to adjust the transmission power level. In the closed-loop power control method, the transmit power level from eg the AP can be obtained by exchanging messages between the AP and the MU. However, WLAN standards such as "IEEE 802.11b, 1999 version" neither address the power control issue nor provide enough information for the MU to utilize the closed-loop power ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/005H04L1/00
CPCH04L1/0002H04W52/50H04W52/267Y02B60/50
Inventor 钱志成刘洁文
Owner INTEL CORP