Fast CDMA push-to-talk.

ALTHOUGH IT'S A PROBLEM Nextel solved a long time ago on its Direct Connect system, getting a low-latency connection is still a challenge on other mobile phone systems.

Qualcomm wants to provide low-latency PTT (1) (Postal, Telegraph & Telephone) The governmental agency responsible for combined postal, telegraph and telephone services in many European countries.

(2) See push-to-talk.

PTT - Post, Telephone and Telegraph administration capabilities for its CDMA (Code Division Multiple Access) A method for transmitting simultaneous signals over a shared portion of the spectrum. The foremost application of CDMA is the digital cellular phone technology from QUALCOMM that operates in the 800 MHz band and 1.9 GHz PCS band. 2000 and other CDMA 3G networks wireless carrier customers. Its QChat technology provides PTT call set-up of less than two seconds using Voice over IP (VoIP). Qualcomm says QChat also minimizes use of radio resources compared with other PTT systems.

The QChat client runs as an application on Qualcomm's Binary Runtime Environment for Wireless BREW is an application development platform created by Qualcomm for mobile phones. It was originally developed for CDMA handsets, but has since been ported to other air interfaces including GSM/GPRS, UMTS, and CDMA. (BREW (Binary Runtime Environment for Wireless) An application development environment from Qualcomm for enhanced cellphone services (e-mail, games, etc.). BREW is directly supported in the CDMA chipsets from Qualcomm, and BREW-enabled applications work no matter ) platform. It offers dynamic, over-the-air upgrades of handset software, management of group membership by subscribers, and ad hoc For this purpose. Meaning "to this" in Latin, it refers to dealing with special situations as they occur rather than functions that are repeated on a regular basis. See ad hoc query and ad hoc mode. creation of chat groups.

For now, Qualcomm is pitching QChat only to mobile phone carriers in other countries. Its PTT is locked out of the U.S. until 2006 because of an agreement with Nextel; in return, Qualcomm gets to market the technology to Nextel's international affiliates.

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Title Annotation:	News: trends standards products
Publication:	Mobile Business Advisor
Article Type:	Brief Article
Geographic Code:	1USA
Date:	Aug 1, 2003
Words:	157
Previous Article:	Nextel improves push-to-talk.
Next Article:	T-mobile bundles Wi-Fi and wireless phone service.
Topics:	Telecommunications equipment industry Product development VoIP (Network protocols)

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