目录
1 引言 ...............................................................................................................................................1
1.1 目的 .................................................................................................................................1
1.2 范围 ....................................................................................................................................1
1.3 定义、简写和缩略语 ........................................................................................................1
1.4 引用文件 ............................................................................................................................1
1.5 综述 ....................................................................................................................................2
2 总体描述 .......................................................................................................................................2
2.1 产品描述 ............................................................................................................................2
2.1.1 系统接口 .................................................................................................................2
2.1.2 用户界面 .................................................................................................................3
2.1.3 硬件接口 .................................................................................................................3
2.1.4 软件接口 .................................................................................................................3
2.1.5 通信接口 .................................................................................................................3
2.1.6 内存约束 .................................................................................................................3
2.1.7 操作 .........................................................................................................................4
2.1.8 现场适应性需求 .....................................................................................................4
2.2 产品功能 ............................................................................................................................4
2.3 用户特点 ............................................................................................................................4
2.4 约束 ....................................................................................................................................4
2.5 假设和依赖关系 ................................................................................................................5
2.6 需求分配 ............................................................................................................................5
3 具体需求 .......................................................................................................................................5
3.1 外部接口 ............................................................................................................................6
3.2 功能 ....................................................................................................................................6
3.2.1 SR.FUNC.001 支持用户上线 ..................................................................................6
3.2.2 SR.FUNC.002 支持用户下线 ..................................................................................7
3.2.2 SR.FUNC.003 支持用户移动切换...........................................................................7
3.3 性能需求 ............................................................................................................................7
3.4 数据库逻辑需求 ................................................................................................................8
3.5 设计约束 ............................................................................................................................8
3.5.1 标准依从性 .............................................................................................................8
3.6 软件系统属性 ....................................................................................................................8
3.6.1 可靠性 .....................................................................................................................9
3.6.2 可用性 .....................................................................................................................9
3.6.3 安全保密性 .............................................................................................................9
3.6.4 可维护性 .................................................................................................................9
3.6.5 可移植性 .................................................................................................................9
3.6.6 可测试性 .................................................................................................................9
4 专利识别 .......................................................................................................................................9
5 附录 .............................................................................................................................................10
