Abstract: Based on the study of the application layer of Dedicated Short Range Communication (DSRC) protocol stack, as for the ASN.1 PER encoding and decoding module, a framework for encoding and decoding was designed and implemented, which included ASN.1 mapping rules, a general procedure for encoding and decoding, and a memory management method specifically designed for small devices. The framework is of good generality because of well-organized modules. The test results show that the framework has good performance, and it meets the real-time requirement of the protocol.

Key words: Dedicated Short Range Communication (DSRC), Abstract Syntax Notation One (ASN.1), Packed Encoding Rules (PER), memory management

摘要： 通过研究专用短程通信（DSRC）协议栈中的应用层部分，针对其中的ASN.1 PER编解码模块，设计并实现了一种编解码框架，框架包括ASN.1映射规则、通用编解码流程以及符合小设备应用的内存管理机制。良好的模块划分使得此框架具有较好的通用性。测试结果表明，此实现框架具有良好的性能，满足协议的实时性要求。

关键词: 专用短程通信, ASN.1, 紧缩编码规则, 内存管理