The Design Of COS Platform Of 32-Bit UICC Which Is Multi-Application And Suitable For Re-Development

The kernel technique of software is the operating system(abbr. COS). The powerful COS can greatly promote the card system to be acceptable and feasible.The telecommunication smart card based on the 2G, especially in China, various cards business mostly has own COS platform based on Native; Specially the domestic enterprise, devote to the smart card chip development, independently researches and develops from the hardware to the software, polymorphism becomes the early time face SIM primary COS, but the portability ,the versatility and the maintenance are not good, most of them are single document systematic, sole application, single channel, they have not considered the multi-applications the realization,such as realization between multi-application filing system , different application document isolation, mapping, kinds of PIN management, multichannel realization and so on,the JAVA card platform is good onversatility , but it is extremely high to the hardware resources request,it is weak in realizes on the multiple file system. In view of in the above situation, this article has provided a kind of new COS platform design proposal. This article develops the platform of UICC COS, in the overall design through the reasonable hierarchical structure, causes the upper formation the application and the first floor hardware separates, it is advantageous for the platform the transplant operation, the maintenance is good; In the filing system design, it has used the general filing system which enables the platform to have the good versatility; It has made the full design in the security; In depended upon the multichannel, the multiple files using the design in systematic as well as the multistage PIN correlation techniques has realized the multi-applications; Proposed re-development's innovative designs, safeguarded above the COS level the application cooperation development security to be possible to realize; In addition, it also did in the power failure protection aspect has designed and realizes, has safeguarded the user data in the use process security and the reliability. This article has carried on the reliable script test and the solid net confirmation work in view of the above design, the success has realized UICC SIM and the USIM function, COS can ascend the net and communicate normally.