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Terminal transmit power control with link adaptation

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Terminal transmit power control with link adaptation


Methods for coordinating power usage and link adaptation in wireless communications are described. Terminals and/or access points (APs) may attempt to modify terminals' transmit power in relation to a desired communication data transfer rate. Link adoption may also be used in conjunction with the described methods.
Related Terms: Access Point Communications Data Transfer Data Transfer Rate Wireless Transfer Rate

Browse recent Toshiba America Research, Inc. patents - Piscataway, NJ, US
USPTO Applicaton #: #20140010174 - Class: 370329 (USPTO) -
Multiplex Communications > Communication Over Free Space >Having A Plurality Of Contiguous Regions Served By Respective Fixed Stations >Channel Assignment

Inventors: Ryoko Matsuo, Shuichi Obayashi, Toshikazu Kodama, David Famolari

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The Patent Description & Claims data below is from USPTO Patent Application 20140010174, Terminal transmit power control with link adaptation.

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CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a divisional of U.S. application Ser. No. 10/968,244, filed Oct. 20, 2004, whose contents are expressly incorporated by reference.

TECHNICAL FIELD

Aspects of the present invention relate to wireless communications. More particularly, aspects of the present invention relate to controlling power used to transmit wireless signals.

RELATED ART

The growth of wireless communications and integration with the internet continues to influence the growth of local area networks. Since the expansion of IEEE 802.11-based communication protocols and related devices, wireless local area networks (WLANs) are appearing with regular frequency. WLANs provide high speed wireless connectivity between PCs, PDAs and other equipment in corporate, public and home environments. WLAN users have come to expect access to WLANs and wanting larger coverage areas and higher throughputs. For portable users power consumption concerns are also an issue.

Currently, IEEE 802.11-series protocols are the leading WLAN standards. Some standards (ex: IEEE 802.11a/b/g) have finished standardization. Some of these standards include the ability to modify power on a link to a unit.

At the same time, wireless providers are experimenting with adaptive antenna arrays (also referred to as smart array antennas). Current approaches to adaptive antenna arrays do not address power control issues. Rather, adaptive arrays concentrate on beam steering techniques.

SUMMARY

Aspects of the present invention address one or more of the issues identified above, thereby providing an improved power control system for use with wireless communications.

BRIEF DESCRIPTION OF DRAWINGS

Aspects of the present invention are described in relation to the following drawings.

FIG. 1 shows transmit power control in accordance with aspects of the present invention.

FIGS. 2A and 2B show changing array patterns based on load equalization in accordance with aspects of the present invention.

FIGS. 3A and 3B show changing array patterns based on packet steering in accordance with aspects of the present invention.

FIG. 4 shows a process for reducing power in accordance with aspects of the present invention.

FIG. 5 shows a conventional link adaptation method.

FIGS. 6 and 7 show link adaptation in accordance with aspects of the present invention.

FIGS. 8A and 8B show modifications of antenna parameters in accordance with aspects of the present invention.

FIGS. 9-18 show link adaptation in accordance with aspects of the present invention.

FIG. 19 shows an illustrative example of a base station in accordance with aspects of the present invention.

FIGS. 20-21 show additional illustrative examples of access points in accordance with aspects of the present invention.

FIG. 22 shows a process for determining premium gain in accordance with aspects of the present invention.



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stats Patent Info
Application #
US 20140010174 A1
Publish Date
01/09/2014
Document #
13900096
File Date
05/22/2013
USPTO Class
370329
Other USPTO Classes
International Class
04W52/24
Drawings
21


Access Point
Communications
Data Transfer
Data Transfer Rate
Wireless
Transfer Rate


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