| CDMA mobile terminals are second generation portable communication devices which based on CDMA technology as its communication standards, Voice call function is a basic function needs realizing in every portable mobile communication device, also in CDMA handsets.The paper discusses based on CDMA mobile communication technology and American Qualcomm Company's mobile development platform (BREW), first introduces CDMA technology from birth to maturity by its developing course, technology features, and current developing actuality in home and abroad; discusses basic communication principles in CDMA mobile communication technology, introduces BREW mobile developing platform multiple task real time operating system(REX),the architecture of BREW platform and its position in the entire handset software, interface encryption mechanism and message handling mechanism, the relationships between BREW and REX. Following the above discuss, the author makes a particular requirement analysis, including requirements modeling, set down software specifications; after requirement analysis begins particular software design of the voice call control system, the paper analyze and design the voice call control system by dividing the voice call control system into two layers: the upper layer is application layer, with the main purpose of realizing user interface part; the nether layer is service layer, with the main purpose of realizing encryption of the bottom functions and providing functionalities to the upper layer applications in the form of interface functions. Finally, the paper do functional test and validations to the realized CDMA mobile terminal voice call software control system and educed test result. |
PDF Full Text Request