摘要
采用通用微控制器实现电子收费(ETC)专用短程通信的逻辑链路控制(LLC)子层时存在功耗大、速度慢等缺点。针对该问题,通过研究ETC系统中车载单元LLC子层协议的工作原理,提出以专用逻辑电路实现LLC子层的功能,给出2种类型服务在该层的状态转换方式。利用Verilog HDL在FPGA上实现该层的功能,结果证明了该方法的有效性。
There are some disadvantages of high power dissipation,low speed and so on when the general microcontroller is used to implement the Logical Link Control(LLC) sub-layer of Dedicated Short-Range Communication(DSRC) in Electronic Toll Collection(ETC) system.By analyzing working principle of LLC sub-layer protocol of on-board unit in ETC system,this paper proposes a LLC sub-layer protocol which is implemented by specific logical circuit.The state transition modes of two types of services are presented.The function of LLC sub-layer is realized in Verilog HDL,and FPGA experimental results show the effectiveness of the method.
出处
《计算机工程》
CAS
CSCD
北大核心
2011年第8期246-248,共3页
Computer Engineering
基金
中华人民共和国交通运输部基金资助项目(2009-353-332-290)
江苏省交通厅基金资助项目(09X12)
江苏省研究生创新工程基金资助项目(CX09S-022Z)
关键词
电子收费
专用短程通信
逻辑链路控制
状态分析
FPGA实现
VERILOG
HDL语言
Electronic Toll Collection(ETC); Dedicated Short-Range Communication(DSRC); Logical Link Control(LLC); state analysis; implementation with FPGA; Verilog HDL;