The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 09, 2013
Filed:
Apr. 16, 2002
John Coffee, Tempe, AZ (US);
Kevin Marvin, Gilbert, AZ (US);
Terry Gin, Chandler, AZ (US);
David Anderson, Gilbert, AZ (US);
John Coffee, Tempe, AZ (US);
Kevin Marvin, Gilbert, AZ (US);
Terry Gin, Chandler, AZ (US);
David Anderson, Gilbert, AZ (US);
Trimble Navigation Limited, Sunnyvale, CA (US);
Abstract
A method and system for efficient extended data communications using a GPRS (General Packet Radio Service) carrier network. In a communications system having a server and client device coupled by a GPRS network, a communication session is initiated by the client. A combination of data packet transmission frequency adjustment and the transmission of 'keep alive' packets are used to prevent carrier network time-out of the communication session. In multiple server environments such as those using load sharing, a queuing mechanism is provided for outbound messages to client devices.