Patent Number: 8,798,662

Title: Transmission control for a specific absorption rate compliant communication device

Abstract: Transmission of data from a portable communication device to a station via a radio frequency signal uses a protocol that has recurring frames, each having a plurality of transmission slots, different numbers of which can be used to transmit the data. When the portable communication device desires to send a data transmission, a first value is selected for either a power level for the radio frequency signal or the number of transmission slots to use. Then the first value is used to select a second value for the other one of the power level and the number of transmission slots. The first and second values are selected so that the data transmission at the selected power level using the selected number of transmission slots does not result in a specific absorption rate that is greater than a specific absorption rate limit.

Inventors: Ali; Shirook (Waterloo, CA), Womack; James (Irving, TX), Kanj; Houssam (Waterloo, CA), Mobasher; Amin (Stanford, CA)

Assignee: BlackBerry Limited

International Classification: H04B 7/00 (20060101)

Expiration Date: 8/05/12018