JAVACARD SIM内存管理方法优化研究

Optimization Study on JAVACARD SIM Memory Management Method

在移动通信网络中,SIM主要负责移动通信网络接入鉴权认证,并承载各种行业应用,当前SIM芯片物理内存资源有限,需提升SIM内存利用率从而加载更多行业应用。首先对SIM的内存架构进行分析,将物理内存分为固定内存和剩余待分配内存。其次明确了待分配内存中DTR和RTR内存的管理原则。最后结合应用的安装、删除等管理操作,阐述了待分配内存申请占用、释放回收、内存溢出等管理原则。通过对待分配内存优化管理可提升SIM物理内存利用率,加载并运行更多的行业应用。

In the mobile communication network,SIM is mainly responsible for the authentication of mobile communication network ac-cess,and carrying various industrial applications.Currently,the physical memory resources of SIM chips are limited,so SIM memory utilization needs to be improved to load more industrial applications.Firstly,the memory architecture of SIM is ana-lyzed,and the physical memory is divided into fixed memory and the remaining memory to be allocated.Secondly,the man-agement principles of DTR and RTR memory in the pending allocated memory are defined.Finally,combined with the man-agement operations of application installation and deletion,the management principles of memory request,release,recycle,and memory overflow are expounded.Memory allocation optimization management improves SIM physical memory utilization and can load and run more industry applications.